A B. SICAM Feeder Condition Monitor. Preface. Open Source Software. Table of Contents. Delivery 1. Introduction 2. Hardware Components and Drawings 3

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1 Preface Open Source Software SICAM Feeder Condition Monitor v2.61 Manual Table of Contents Delivery 1 Introduction 2 Hardware Components and Drawings 3 Device Functions 4 Technical Data 5 Type Testing 6 Connection Diagrams 7 Parameterization Modbus Registers A B Index E50417-H8940-C509-A7

2 i NOTE For your own safety, observe the warnings and safety instructions contained in this document, if available. Disclaimer of Liability This document has been subjected to rigorous technical review before being published. It is revised at regular intervals, and any modifications and amendments are included in the subsequent issues. The content of this document has been compiled for information purposes only. Although Siemens AG has made best efforts to keep the document as precise and up-to-date as possible, Siemens AG shall not assume any liability for defects and damage which result through use of the information contained herein. This content does not form part of a contract or of business relations; nor does it change these. All obligations of Siemens AG are stated in the relevant contractual agreements. Siemens AG reserves the right to revise this document from time to time. Document version: E50417-H8940-C509-A7.01 Edition: Version of the product described: v2.61 Copyright Copyright Siemens AG All rights reserved. The disclosure, duplication, distribution and editing of this document, or utilization and communication of the content are not permitted, unless authorized in writing. All rights, including rights created by patent grant or registration of a utility model or a design, are reserved. Trademarks SIPROTEC, DIGSI, SIGUARD, SIMEAS, and SICAM are trademarks of Siemens AG. Any unauthorized use is illegal. All other designations in this document can be trademarks whose use by third parties for their own purposes can infringe the rights of the owner.

3 Preface Purpose of the Manual This manual describes the application, functions, installation, and operation of the SICAM Feeder Condition Monitor (FCM) 6MD232xx. Target Audience Protection system engineers, commissioning engineers, persons entrusted with the setting, testing and maintenance of automation, selective protection and control equipment, and operational crew in electrical installations and power plants. Scope This manual applies to SICAM Feeder Condition Monitor (FCM) 6MD232xx; firmware version v2.61. Indication of Conformity This product complies with the directive of the Council of the European Communities on the harmonization of the laws of the Member States relating to electromagnetic compatibility (EMC Directive 2014/30/EU) and concerning electrical equipment for use within specified voltage limits (Low Voltage Directive 2014/35/EU) as well as restriction on usage of hazardous substances in electrical and electronic equipment (RoHS Directive 2011/65/EU). This conformity has been proved by tests performed according to the Council Directive and in accordance with the generic standard IEC/EN (for EMC directive) and with the standards IEC/EN and IEC/EN (for Low Voltage Directive) by Siemens AG. The device is designed and manufactured for application in an industrial environment. RoHS directive 2011/65/EU is met using the standard EN The product conforms with the international standards of IEC Other Standards IEEE Std C and EN IEC/EN : IEC/EN : Support Our Customer Support Center provides a 24-hour service. Phone: +49 (180) Fax: +49 (180) support.energy@siemens.com Additional Support For questions about the system, please contact your Siemens sales partner. SICAM, Feeder Condition Monitor, Manual 3

4 Preface Training Courses Inquiries regarding individual training courses should be addressed to our Training Center: Siemens AG Siemens Power Academy TD Humboldtstraße Nürnberg Germany Phone: +49 (911) Fax: +49 (911) Internet: Notes on Safety This document is not a complete index of all safety measures required for operation of the equipment (module or device). However, it comprises important information that must be followed for personal safety, as well as to avoid material damage. Information is highlighted and illustrated as follows according to the degree of danger:! DANGER DANGER means that death or severe injury will result if the measures specified are not taken. ² Comply with all instructions, in order to avoid death or severe injuries.! WARNING WARNING means that death or severe injury may result if the measures specified are not taken. ² Comply with all instructions, in order to avoid death or severe injuries.! CAUTION CAUTION means that medium-severe or slight injuries can occur if the specified measures are not taken. ² Comply with all instructions, in order to avoid moderate or minor injuries. NOTICE NOTICE means that property damage can result if the measures specified are not taken. ² Comply with all instructions, in order to avoid property damage. i NOTE Important information about the product, product handling or a certain section of the documentation which must be given particular attention. 4 SICAM, Feeder Condition Monitor, Manual

5 Preface Qualified Electrical Engineering Personnel Only qualified electrical engineering personnel may commission and operate the equipment (module, device) described in this document. Qualified electrical engineering personnel in the sense of this manual are people who can demonstrate technical qualifications as electrical technicians. These persons may commission, isolate, ground and label devices, systems and circuits according to the standards of safety engineering. Proper Use The equipment (device, module) may be used only for such applications as set out in the catalogs and the technical description, and only in combination with third-party equipment recommended and approved by Siemens. Problem-free and safe operation of the product depends on the following: Proper transport Proper storage, setup and installation Proper operation and maintenance When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper action is not taken, death, severe injury or property damage can result: The equipment must be grounded at the grounding terminal before any connections are made. All circuit components connected to the power supply may be subject to dangerous voltage. Hazardous voltages may be present in equipment even after the supply voltage has been disconnected (capacitors can still be charged). Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the equipment, ensure that the current-transformer circuits are short-circuited. The limiting values stated in the document must not be exceeded. This must also be considered during testing and commissioning. SICAM, Feeder Condition Monitor, Manual 5

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7 Open Source Software The product contains, among other things, Open Source Software developed by third parties. The Open Source Software used in the product and the license agreements concerning this software can be found in the Readme_OSS. These Open Source Software files are protected by copyright. Your compliance with those license conditions will entitle you to use the Open Source Software as foreseen in the relevant license. In the event of conflicts between Siemens license conditions and the Open Source Software license conditions, the Open Source Software conditions shall prevail with respect to the Open Source Software portions of the software. The Open Source Software is licensed royalty-free. Insofar as the applicable Open Source Software License Conditions provide for it you can order the source code of the Open Source Software from your Siemens sales contact - against payment of the shipping and handling charges - for a period of at least 3 years since purchase of the Product. We are liable for the Product including the Open Source Software contained in it pursuant to the license conditions applicable to the Product. Any liability for the Open Source Software beyond the program flow intended for the Product is explicitly excluded. Furthermore any liability for defects resulting from modifications to the Open Source Software by you or third parties is excluded. We do not provide any technical support for the Product if it has been modified. SICAM, Feeder Condition Monitor, Manual 7

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9 Table of Contents Preface...3 Open Source Software Delivery Delivery Introduction Overview Hardware Components and Drawings Hardware Components Terminal Diagram Dimensional Drawings Device Functions Description Measurements and Derived Values Fault Detection Fault-Reset Mechanism Enhanced Fault Validation and Fault-Reset Function Trip Time DMT and IDMT Ground-Fault Parameter Active Group Setting Fault Indication Relay Configuration Operating Modes Power-Flow Direction Reversal P,Q Sign Phase Angle Calculations Determination of Fault Direction Direction Determination of Phase Elements Directional Ground Fault (Compensated/Resonant-Grounded) Directional Ground Fault (Isolated) Ground-Fault Direction for Solidly Grounded System Ground-Fault Detection with Cos ϕ/sin ϕ Measurement Determination of Repeated Phase Faults with Automatic Reclosing Intermittent Ground Fault Inrush-Current Detection/Blocking Primary Current Settings Ground-Current Calculation Network Voltage Ratio SICAM, Feeder Condition Monitor, Manual 9

10 Table of Contents Voltage Measurements with Sensors as per IEC and with Conventional Voltage Sensors Low-Voltage Measurement Determination of Medium Voltage via Low-Voltage Measurements Voltage Measurement via Integrated Voltage-Detecting Systems Energy Measurement RTC Synchronization Remote Firmware Updates Password Menu Access Device Alerts Archive Logging Battery Freshness Mode Technical Data Device Technical Data Type Testing Type Testing Connection Diagrams Connection Diagrams Installing the Device Sensor Connections Modbus Connection of SICAM FCM with RTU A Parameterization A.1 Parameterization...76 A.2 Parameterizing the User Interface...77 A.3 Editing the Device Settings...83 B Modbus Registers B.1 Modbus Registers...86 B.2 Implementation of the Modbus Protocol...87 B.3 Bit-Type Data B.4 Register-Type Data Holding Registers B.5 Register-Type Data Input Registers B.6 Register-Type Data Analog Input Registers B.7 Register-Type Data Events B.8 Register-Type Data Trailing Pointers B.9 Self-Test Mode Index SICAM, Feeder Condition Monitor, Manual

11 1 Delivery 1.1 Delivery 12 SICAM, Feeder Condition Monitor, Manual 11

12 Delivery 1.1 Delivery 1.1 Delivery Delivery Note The SICAM FCM device is delivered in a cardboard box containing the Siemens logo. Contents of Delivery 1 SICAM FCM device 1 document with safety instructions 1 ground wire! DANGER Danger of explosion of the battery. Noncompliance with the safety instructions means that death, severe injuries, or considerable material damages can occur. ² Do not throw the SICAM FCM device containing a battery into a fire.! WARNING Warning about battery disposal. Noncompliance with the safety instructions means that severe injuries or considerable material damages can occur. ² When discharged, or when properly secured against short-circuit, lithium batteries can be disposed of through retailers or at depots run by competent organizations (for example, in Germany GRS collection points). i i NOTE SICAM FCM with 1 contained lithium metal cell (0.6 g lithium content) meets the preconditions of Special Provision 188 of the UN Recommendations on the Transport of Dangerous Goods, 17th revised edition and is classified according to: ADR/RID/ADN/IMDG-Code: UN 3091 lithium metal batteries contained in equipment, 9, preconditions of SP 188 ICAO-TI/IATA-DGR: UN 3091 lithium metal batteries contained in equipment, 9, preconditions of Section II PI 970 NOTE Do not transport the SICAM FCM when it is activated. Before transportation, ensure that the SICAM FCM is in Battery Freshness Mode (BFM). 12 SICAM, Feeder Condition Monitor, Manual

13 2 Introduction 2.1 Overview 14 SICAM, Feeder Condition Monitor, Manual 13

14 Introduction 2.1 Overview 2.1 Overview SICAM Feeder Condition Monitor (FCM) is an Intelligent Electronic Device (IED) used for detecting and indicating short circuits or ground faults with and without directional information. SICAM FCM accurately monitors, measures, and displays operational measured values and performs the condition monitoring task in a medium-voltage distribution system. SICAM FCM is typically used in the medium-voltage and low-voltage secondary substation that ranges from 0.4 kv up to 36 kv. SICAM FCM measures the RMS value for alternating voltage, alternating current, and power frequency. SICAM FCM calculates the active power (P), reactive power (Q), apparent power (S), power factor (cos Φ), phase angle, energy, and other relevant values. SICAM FCM consists of the following hardware interfaces: 3 current inputs 3 voltage inputs 1 digital input 2 digital outputs 1 RS 485 interface (Modbus RTU) 1 auxiliary power supply [dw_sfcmblkd , 5, en_us] Figure 2-1 SICAM FCM Block Diagram for MLFB 6MD2321-0AA10-1AA0 14 SICAM, Feeder Condition Monitor, Manual

15 Introduction 2.1 Overview Applications Flush Mounting [dw_sfcmblkd , 2, en_us] Figure 2-2 SICAM FCM Block Diagram for MLFB 6MD2322-0AA10-1AA0 SICAM FCM is used: As a directional and non-directional short circuit and ground-fault detector suitable for solid, isolated, and compensated networks in medium-voltage and low-voltage distribution systems As a simple power quality meter and energy measurements in various applications SICAM FCM can be flush-mounted in the panel and operated inside an enclosed dry room. To mount SICAM FCM in the panel, proceed as follows: Cut a rectangle in the Ring-Main Unit (RMU) panel measuring mm x mm (W x H). Carry out all the required internal wiring connections. For more information about terminal diagrams, refer to 3.2 Terminal Diagram. Flush SICAM FCM into the panel and lock with the clamps. For more information about installation, refer to 7.2 Installing the Device. Device Ordering Information Use the following ordering information to order SICAM FCM and other related accessories. Table 2-1 SICAM FCM and Accessories Ordering Information Description SICAM FCM Voltage measurements: VTs according to IEC , conventional VT and 230 V Fault indicator with directional information and measurements of V, I, f, P, Q, S, cosφ, and power-flow direction Panel mounted Dimensions in mm: 96 x 48 x digital input 2 digital outputs Modbus RTU Order Number 6MD2321-1AA00-1AA0 SICAM, Feeder Condition Monitor, Manual 15

16 Introduction 2.1 Overview Description SICAM FCM For voltage measurement in voltage detecting systems as per IEC Fault indicator with directional information and measurements of V, I, f, P, Q, S, cosφ, and power-flow direction Panel mounted unit with display Dimensions in mm: 96 x 48 x digital input 2 digital outputs Modbus RTU Adapter 1 A to low power IEC inputs, transformer ratio 225 mv@1 A Accuracy class: 1 Thermal overload: 100 A for 1 s Coil diameter: 5.8 mm Adapter 5 A to low power IEC inputs, transformer ratio 225 mv@5 A Accuracy class: 3 Thermal overload: 100 A for 1 s Coil diameter: 5.8 mm Phase current sensor split core Ratio: 225 mv@300 A, IEC Accuracy class: 1 extension 200 %, 5P10 Connection cable: 3.5 m, open end Internal diameter: 55 mm Phase current sensor closed ring core Ratio: 225 mv@700 A, IEC Accuracy class: 0.5 extension 200 %, 5P10 Connection cable: 3.5 m, open end Internal diameter: 55 mm GOST certificate Core balance current sensor split core Ratio: 225 mv@60 A, IEC Accuracy class: 1, 0.4 A ε < 10 %, 200 A ε < 20 % Connection cable: 3.5 m Window diameter: 120 mm Core balance current sensor split core Ratio: 225 mv@60 A, IEC Accuracy class: 1, 0.4 A ε < 10 %, 200 A ε < 20 % Connection cable: 3.5 m Window diameter: 120 mm GOST certificate Voltage Sensor 10 kv 10 kv/ 3 : 3.25/ 3 Accuracy class: 1 IEC for symmetrical T connectors with C cone Voltage factor: 1.2 V N Voltage factor: 1.9 V N for maximum of 8 hours Order Number 6MD2322-0AA10-1AA0 6MD2320-0AA10-1AA0 6MD2320-0AA20-1AA0 6MD2320-0GA00-1AA0 6MD2320-0JA00-0BA1 6MD2320-0AF00-1AA0 6MD2320-0AF00-1AA1 6MD2320-0AA04-1AA0 16 SICAM, Feeder Condition Monitor, Manual

17 Introduction 2.1 Overview Description Voltage Sensor 10 kv 10 kv/ 3 : 3.25/ 3 Accuracy class: 1 IEC for asymmetric T connectors of nkt cables type CB-24 and TE connectivity Type RSTI-58xx, RSTI-CC 58xx Voltage factor: 1.2 V N Voltage factor: 1.9 V N for maximum of 8 hours Voltage Sensor 10 kv 10 kv/ 3 : 3.25/ 3 Accuracy class: 0.5 IEC for asymmetric T connectors of nkt cables type CB-24 and TE connectivity Type RSTI-58xx, RSTI-CC 58xx Voltage factor: 1.2 V N Voltage factor: 1.9 V N for maximum of 8 hours, GOST certificate Voltage Sensor 20 kv 20 kv/ 3 : 3.25/ 3 Accuracy class: 1 IEC for symmetric T connectors with C cone Voltage factor: 1.2 V N Voltage factor: 1.9 V N for maximum of 8 hours Voltage Sensor 20 kv 20 kv/ 3 : 3.25/ 3 Accuracy class: 1 IEC for asymmetric T connectors of nkt cables type CB-24 and TE connectivity Type RSTI-58xx, RSTI-CC 58xx Voltage factor: 1.2 V N Voltage factor: 1.9 V N for maximum of 8 hours Connecting Cable 3 voltage inputs 1 ground input Length: 0.3 m Order Number 6MD2320-0AA04-1AB0 6MD2320-0AA04-1AB1 6MD2320-0AA07-1AA0 6MD2320-0AA07-1AB0 6MD2322-0AA80-0AB3 Typical Ordering Combinations MLFB Number Use Case SICAM FCM For resistive voltage dividers, conventional VTs, and 230 V. Fault indicator with directional information and measurements of V, I, f, P, Q, S, cos Φ, power-flow direction, 2 digital outputs 6MD2321-1AA00-1AA0 LoPo sensors available Neutralpoint treatment: Solid/lowresistant Neutralpoint treatment: Isolated/ compensated Conventional 1 x 1 x 1 x 1 x 1 A/ 5 A CTs available Connecting cable SICAM, Feeder Condition Monitor, Manual 17

18 Introduction 2.1 Overview Typical Ordering Combinations MLFB Number Use Case SICAM FCM For voltage detecting systems Fault indicator with directional information and measurements of V, I, f, P, Q, S, cosφ, and powerflow direction, 2 digital outputs 1 A adaptor mv lowpower signal 5 A adaptor mv lowpower signal Phase-current sensor Core balance current sensor Voltage sensor Depending on requirements Depending on requirements For example, GOST certificate Depending on voltage level and form factor 6MD2322-0AA10-1AA0 6MD2320-0AA10-1AA0 6MD2320-0AA20-1AA0 LoPo sensors available Neutralpoint treatment: Solid/lowresistant Neutralpoint treatment: Isolated/ compensated Conventional 1 x 1 x 1 x 1 x 1 x 1 x 1 x Refer to Table x 2 x Refer to Table x Refer to Table 2-1 (3 x) 1 (3 x)1 1 A/ 5 A CTs available Connecting cable Accessories You can download the current version of the SICAM FCM manual from Siemens Powerquality. 1 Optional for measuring purpose or for directional information 18 SICAM, Feeder Condition Monitor, Manual

19 3 Hardware Components and Drawings 3.1 Hardware Components Terminal Diagram Dimensional Drawings 23 SICAM, Feeder Condition Monitor, Manual 19

20 Hardware Components and Drawings 3.1 Hardware Components 3.1 Hardware Components In this manual, SICAM FCM is also referred as device. Microcontroller The device uses a low-power ARM MCU which includes high-precision 16-bit ADCs. Battery The device contains a battery with 3.6 V and a capacity of 1.2 Ah. LCD LCD is used to view real-time values, events, archives, and device parameters. Keypads The 4 navigation keys are used to navigate through the device menu and to select the desired parameters. The functions of the navigation keys are specific to different menu sections. LEDs The device consists of 3 LEDs which indicate the status of the process. FAULT (Red) Indicates when any distribution-system fault is detected COM (Yellow) Indicates that the communication is active between Modbus master and the SICAM FCM RUN (Green) Indicates the healthy condition of the device and operating on the auxiliary voltage Digital Input The device consists of 1 digital input for resetting the fault indication. Digital Output The device consists of 2 digital outputs for indicating fault conditions. [dw_sfcmhwbd , 1, en_us] Figure 3-1 SICAM FCM Hardware Block Diagram 20 SICAM, Feeder Condition Monitor, Manual

21 Hardware Components and Drawings 3.2 Terminal Diagram 3.2 Terminal Diagram The terminal diagram is located on top of the housing and displays the terminal numbers and terminals. [dw_sfcmtrml , 3, en_us] Figure 3-2 Terminal Diagram Table 3-1 Terminal Specifications Terminal Number Terminal Name Description (1) 1 Functional ground (2) N(-)/~ Auxiliary voltage (3) L(+)/~ Auxiliary voltage (4) COM Modbus - Common (5) A/- Modbus - T x (6) B/+ Modbus - R x (7) DI1(-) Digital input (-) (8) DI1(+) Digital input (+) (9) DO2 Digital output 2 (10) DO2 Digital output 2 (11) DO1 Digital output 1 (12) DO1 Digital output 1 (13) I 1 /A Phase current I 1 (14) I 1 N Neutral (15) I 2 /I N /B Phase current I 2 or ground current I N (16) I 2 /I N N Neutral (17) I 3 /C Phase current I 3 (18) I 3 N Neutral (19) V 1 Voltage input V 1 (20) V 1 N 2 Neutral (21) V 2 Voltage input V 2 (22) V 2 N 2 Neutral (23) V 3 Voltage input V 3 (24) V 3 N 2 Neutral 2 V 1 N, V 2 N, V 3 N are internally shorted SICAM, Feeder Condition Monitor, Manual 21

22 Hardware Components and Drawings 3.2 Terminal Diagram Terminal Connections You can connect the device terminals with a wire of cross-section ranging from 0.75 mm 2 to 2.5 mm 2. Use the following options to connect the terminals: Spring-cage connection Spring-cage connection is used to connect the upper row of terminals. From terminal 1 to terminal 12. Screw connection Screw connection is used to connect the bottom row of terminals. From terminal 13 to terminal 24. The following tables show the technical details of the different connection methods. Table 3-2 Spring-Cage Connection Connection Elements Specifications Connection method Spring cage Conductor size (solid) 4.0 mm 2 Conductor size (stranded) 2.5 mm 2 Stripping length 8.0 mm AWG (max.) 12.0 AWG (min.) 24.0 Table 3-3 Screw Connection Connection Elements Specifications Connection method Screw connection Conductor size (solid) 1.0 mm 2 Conductor size (stranded) 1.0 mm 2 Stripping length 8.0 mm AWG (max.) 16.0 AWG (min.) 26.0 Torque 0.5 Nm Screwdriver size 3/32 inch or 2.5 mm 22 SICAM, Feeder Condition Monitor, Manual

23 Hardware Components and Drawings 3.3 Dimensional Drawings 3.3 Dimensional Drawings This chapter shows the dimensional drawings and different views of the device. Rear View [le_sfcmrear , 1, --_--] Figure 3-3 Rear View with Terminals (1) Power supply (2) Modbus (3) Digital input (4) Digital output 2 (5) Digital output 1 (6) Voltage input (7) Current input SICAM, Feeder Condition Monitor, Manual 23

24 Hardware Components and Drawings 3.3 Dimensional Drawings Front View Isometric View [dw_sicam-fcm_frnt, 1, en_us] Figure 3-4 Front View [dw_sicam-fcm_isvw, 1, en_us] Figure 3-5 Isometric View 24 SICAM, Feeder Condition Monitor, Manual

25 Hardware Components and Drawings 3.3 Dimensional Drawings 1 A/5 A Adaptor Drawing [le_sfcm1aadap , 1, --_--] Figure 3-6 1A/5 A Adaptor (1) Threaded stud (2) CT adaptor PCB (3) Cable assembly SICAM, Feeder Condition Monitor, Manual 25

26 26 SICAM, Feeder Condition Monitor, Manual

27 4 Device Functions 4.1 Description 28 SICAM, Feeder Condition Monitor, Manual 27

28 Device Functions 4.1 Description 4.1 Description Measurements and Derived Values The device measures and calculates the values which are displayed on the HMI/Modbus. The following table shows the measured values and derived values of the device when it is connected to the medium-voltage system and low-voltage system. Table 4-1 Measurements and Derived Values Measurements Phase I 1, phase I 2, phase I 3 Phase I 1, ground I N, phase I 3 Derived Values I N and 2nd harmonic of the phase current I 2 and 2nd harmonic of the phase current Phase V 1, V 2, V 3 Phase-to-phase voltages (V12, V23, V31) Frequency 50 Hz/60 Hz Active power, reactive power, and apparent power cos φ (power factor) Phase angle Active import energy, active export energy, reactive import energy, and reactive export energy Fault Detection The device determines the fault based on the following criteria: Overcurrent detection for phase currents (I>, I>>) and ground current (I N >) Ground-current and neutral-point displacement voltage (I N > and V NE >) for resonant-grounded/isolated system where, V NE is an internally calculated value. You can configure the individual time-delay setting for phase current and ground currents. Table 4-2 Timer Configuration ti> Timer for the low-set current threshold I> ti>> Timer for the high-set current threshold I>> ti N > Timer for the ground-current threshold I N > tv NE > Timer for neutral-point displacement voltage V NE > i NOTE For fault detection, the highest values of one of the timers are considered. The device uses the Definite Minimum Time (DMT) or Inverse Definite Minimum Time (IDMT) characteristics for detecting the fault. It identifies the type of the fault and also determines the direction. The following logic diagram shows the fault indication. 28 SICAM, Feeder Condition Monitor, Manual

29 Device Functions 4.1 Description [lo_sfcmfaultdetect , 2, en_us] Figure 4-1 Logic Diagram for Phase-Fault Indication [lo_sfcmfaultreset , 4, en_us] Figure 4-2 Logic Diagram for Ground-Fault Detection For isolated ground: [fo_watt_iso , 1, en_us] For resonant ground: [fo_watt_reso , 1, en_us] SICAM, Feeder Condition Monitor, Manual 29

30 Device Functions 4.1 Description For more information about ground-fault detection by wattmetric method, refer to chapter Ground- Fault Detection with Cos ϕ/sin ϕ Measurement i i NOTE For solid ground or if I dir is set to 0, I dir is disabled and only I N is used for detecting the ground fault. NOTE For solid ground or if V NE is set to 0, V NE is disabled and only I N /I N (Wattmetric) is used for detecting the ground fault. For more information about direction determination, refer to Determination of Fault Direction, Direction Determination of Phase Elements, Directional Ground Fault (Compensated/Resonant- Grounded), and Directional Ground Fault (Isolated). For more information about fault-detection parameters, see Figure A-6 and refer to the Fault Parameters > Phase Fault Detection menu and to the Fault Parameters > Ground Fault Detection menu Fault-Reset Mechanism The fault status of the device can be reset through anyone of the following mechanisms: Auto reset as per user-defined time setting Digital input (DC 24 V to DC 60 V) User interface through keypad (Reset) RS485/Modbus interface The following logic diagram shows the fault-reset mechanism. [lo_sfcmfaultresetmech , 2, en_us] Figure 4-3 Logic Diagram for Fault Indication and Fault Reset Mechanism 30 SICAM, Feeder Condition Monitor, Manual

31 Device Functions 4.1 Description Enhanced Fault Validation and Fault-Reset Function The enhanced fault validation provides an additional functionality by detecting the absence of voltage or current and enables a delay of the fault indication and fault reset. The fault can be detected and reset by additionally configuring the following timers: T1 T2 T3 Monitoring period for fault validation Absence of voltage and current monitoring time Auto reset time after resumption of voltage or current When the system phase current exceeds the set current threshold (I>, low-set) and persists for the defined time (ti>), the device starts monitoring the pickup time (T1). When the fault is isolated, the system voltage/ current drops. When this condition is reached, the device monitors the absence of voltage for a time T2 for the drop in voltage or current as long as it reaches values below 6 kv (phase-to-ground) or 5 A respectively. The fault is indicated if the absence of voltage or current persists until the timer T2 elapses (T2<T1). For the ground fault, configure the threshold for the neutral-point displacement voltage (V NE >) and the ground current (I N >). If the threshold exceeds the setting and the fault persists for the times ti N > and tv NE >, the device indicates the ground fault based on the timers T1 and T2. If the timer T3 is configured, then the auto reset of the fault indication occurs after the resumption of voltage or currents. The device monitors if the voltages or currents of the system increase for this time period T3 above 6 kv or 5 A respectively. After elapse of the set time, the device resets the fault indication. SICAM, Feeder Condition Monitor, Manual 31

32 Device Functions 4.1 Description The following logic diagram illustrates the fault-detection initiation and fault reset. [lo_sfcmfaultdetect , 2, en_us] Figure 4-4 Logic Diagram for Fault-Detection Initiation and Fault Reset 32 SICAM, Feeder Condition Monitor, Manual

33 Device Functions 4.1 Description The following logic diagram illustrates the fault-detection initiation and fault reset. [lo_sfcmfltlgdg , 7, en_us] Figure 4-5 Logic Diagram for Fault-Detection Initiation and Fault Reset For isolated ground: [fo_watt_iso , 1, en_us] For resonant ground: [fo_watt_reso , 1, en_us] i For more information about ground-fault detection by wattmetric method, refer to chapter Ground- Fault Detection with Cos ϕ/sin ϕ Measurement NOTE For solid ground or if I dir is set to 0, I dir is disabled and only I N is used for detecting the ground fault. SICAM, Feeder Condition Monitor, Manual 33

34 Device Functions 4.1 Description i NOTE For solid ground or if V N > is set to 0, V NE is disabled and only I N /I N (Wattmetric) is used for detecting the ground fault. The following logic diagram illustrates the fault indication and fault reset. [lo_sfcmfltlgdrg , 5, en_us] Figure 4-6 Logic Diagram for Fault Indication and Fault Reset 34 SICAM, Feeder Condition Monitor, Manual

35 Device Functions 4.1 Description The following figure describes the timer-based fault-indication operation. [dw_medvolsup , 2, en_us] Figure 4-7 Timer-Based Fault Indication i NOTE If any of the timers T1, T2, and T3 is set to 0, the other 2 timers are disabled. For example, if T1=0, T2 and T3 are disabled Trip Time DMT and IDMT SICAM FCM supports both the DMT and IDMT function. Definite Minimum Time (DMT) DMT is applicable for both the phase fault and the ground fault. The 3 DMT settings are I>, I>>, I N >. Each setting consists of the independent trip-time delays ti>, ti>>, and ti N >. The user-defined DMT setting is used to configure various current thresholds for the entire dynamic primary current range. If the current in the system exceeds the set threshold and persists for the set time specified, the device indicates a fault. The device provides an option to set for 2 current thresholds and 2 time delay thresholds. The following table illustrates the parameter settings and the values. Table 4-3 Reference Parameter Attribute Value I> Setting 50 A to 2500 A ti> Delay setting 40 ms to 60 s I>> Setting 50 A to 2500 A ti>> Delay setting 40 ms to 60 s I N > Setting 0.4 A to 2000 A ti N > Delay setting 40 ms to 60 s SICAM, Feeder Condition Monitor, Manual 35

36 Device Functions 4.1 Description Table 4-4 Operate Level Parameter Attribute Value I> Operate level 110 % of I> ±5 % I>> Operate level 110 % of I>> ±5 % Table 4-5 Operate Time Parameter Attribute Value ti> Operate time 40 ms ±15 ms ti>> Operate time 40 ms ±15 ms Inverse Definite Minimum Time (IDMT) IDMT characteristics are defined as Inverse because the trip time is inversely proportional to the fault current being measured. In SICAM FCM, the IDMT function supports the Normal Inverse (NI) characteristics. The ANSI codes supported by the IDMT function are non-directional (51) and directional (67) for overcurrent indication. IDMT function is applicable only for the phase currents I 1, I 2, and I 3. The following table illustrates the parameter settings and the values. Table 4-6 Reference Parameter Attribute Value I> Setting 50 A to 2500 A Table 4-7 Operate Level Parameter Attribute Value I> Operate level 110 % of I> ±5 % Table 4-8 Operate Time Parameter Attribute Value Operate time char = IEC-NI ±5 % absolute or ±40 ms Time multiplier setting (k) 0.09 i NOTE The IDMT function is not applicable for the ground fault I N. If ti> is set to zero, the NI trip time curve according to the IEC characteristics is calculated based on the following formula. I fault is the fault current. I set is the setting value of the pickup current. The fixed value of k is i NOTE For setting the IDMT characteristics curves, set ti> = SICAM, Feeder Condition Monitor, Manual

37 Device Functions 4.1 Description Ground-Fault Parameter Active Group Setting The device provides 2 groups of settings (Group 1 and Group 2) for the Neutral-point treatment parameter (solid, resonant, isolated) and Ground-fault parameters (I N >, ti N >, V NE >, tv NE >, and I dir ). You can select the active group and its group parameter from HMI and Modbus, by holding register (address 42) or by turning ON the coil 12. When the device is indicating a fault, you cannot change the active group and its parameters. At any time, only one selected group of settings is active. These parameters are used for detecting the ground fault. For more information about the active-group switching coil, refer to Table B-10. For more information about the active group, refer to Active Group, Page Fault Indication When the device detects a fault, the following components are activated: LED The red LED is turned on and indicates a fault. LCD The LCD displays fault current values with the fault type. Modbus The device sends the fault current, fault type, and additional fault information to the RTU. If a fault is detected, the red LED flashes every 1 s if the device is not powered through an auxiliary supply. i NOTE For the temperatures below -20 C, the LCD display can take up to 2 min to start or display the data Relay Configuration The relay or Digital output (DO) is configured to indicate either the fault direction or the devicehealth status by using the Relay configuration parameter. If the relay is configured to indicate the fault direction: DO1 operates to indicate a forward fault direction and DO2 a reverse fault direction. Operation of both DOs indicates that the fault direction is not determined. If the relay is configured to indicate the device-health status, DO1 operates to indicate that an unhealthy device and DO2 do not operate. i NOTE If both DOs do not operate, this is an indication that the device is healthy. If no fault is present, relay configuration can be switched from the fault direction to the device-health status. If the device is healthy (no watchdog-timer reset occurred), relay configuration can be switched from the device-health status to the fault direction. For more information about the relay configuration parameter, refer to Relay Configuration, Page 113. SICAM, Feeder Condition Monitor, Manual 37

38 Device Functions 4.1 Description Operating Modes The device goes to the sleep mode when disconnected from an auxiliary supply. In this mode, the communication with the RTU is not available. In the sleep mode, you can press any of the keys to view the events. The device enters the deep sleep mode after 8 hours in the sleep mode and requires an auxiliary supply to recover from this mode Power-Flow Direction Reversal The following power-flow direction parameters define the polarity of the CT/LoPo sensor for I 1, I 2, and I 3 measurements: I 1 power-flow direction I 2 /I N power-flow direction I 3 power-flow direction If the CT/LoPo sensor is connected in the opposite direction, the current measured using the CT/LoPo sensor has an additional phase shift of 180. The power-flow direction parameters are used to compensate the additional phase shift. If the power-flow direction parameters are set to reversed, the power-flow direction is reversed by adding 180 to the respective measured phase-current angle. If the power-flow direction parameters are set to not reversed, it restores the power-flow direction to the original direction. For more information about power-flow direction parameters, refer to I 1 Power-Flow Direction, Page 114. Power-Flow Direction Reversal for Solidly-Grounded System The following power-flow direction reversal parameters affect the respective power-flow direction, fault direction, and power: I 1 I 2 I 3 They also affect the I N angle, I N power-flow direction, and I N >> fault direction. The corrected angles for I 1, I 2, and I 3 are displayed in the Modbus input register. If the power-flow direction parameters are set to reversed, the fault direction is shifted by 180. Power-Flow Direction Reversal for Resonant/Isolated Grounded System The power-flow direction reversal for I N affects the I N power-flow direction, I N fault direction, and watt-metric ground current. The original I N angle before correction is displayed in the Modbus input register and is used for deriving the I 2 angle. The power-flow direction reversal for I 1 and I 3 affects the respective power-flow direction, fault direction, and power. The corrected angles for I 1 and I 3 are displayed in the Modbus input register. If the power-flow direction parameters are set to not reversed, the fault direction is shifted by P,Q Sign The P,Q sign parameter is used to reverse the sign of active power (P) and reactive power (Q) for all phases. The P,Q sign parameter cannot be configured for individual phases. If the P,Q sign parameter value is set to not reversed, the sign of active power (P) and reactive power (Q) for all phases indicates the original active power (P) and reactive power (Q). If the P,Q sign parameter 38 SICAM, Feeder Condition Monitor, Manual

39 Device Functions 4.1 Description value is set to reversed, the signs of active power (P) and reactive power (Q) for all phases get reversed. The P,Q sign parameter is independent of the power-flow direction parameter. The P,Q sign parameter affects the total active power (P) and reactive power (Q). The P,Q sign parameter does not affect the power-flow direction, fault direction, current angle, and power factor for all phases. It also does not affect the watt-metric ground current. For more information about the P,Q sign parameter, refer to P,Q Sign, Page Phase Angle Calculations A phase sequence defines the sequential timing in which each phase-to-ground voltage phasor lags each phase-to-ground voltage phasor in the counter-clockwise direction. Figure 4-8 shows the 3 phase sequence. The sequence shown below implies that V12 leads V23 by 120 and V23 leads V31 by 120. In addition, V1N leads V2N by 120 and V2N leads V3N by 120. It is mandatory to establish the balanced phase sequence before any calculations. In the device, V1N is considered as a reference phasor at 0. This phase sequence is needed to relate the calculated phasor angles with reference to the phasor V1N. [dw_sfcm3phangcalc , 3, en_us] Figure Phase Angle Calculations In a standard balanced system, all phase-to-phase voltages are phase-to-neutral voltages multiplied by 3 and lead the phase-to-neutral voltage phasors by 30. For example, in a standard 4-wire, 3-phase wye system with phase-to-neutral voltages of 120 V and V1N selected as the reference phasor, then phase-to-phase voltages are as follows: V12 = ; V23 = ; V31 = Determination of Fault Direction The fault direction for the phase faults is determined by calculating the phase angles between the fault current and the corresponding phase-to-phase voltages. Pickup Measuring Element N 1 I 1 V 2 - V 3 2 I 2 V 3 - V 1 3 I 3 V 1 - V 2 SICAM, Feeder Condition Monitor, Manual 39

40 Device Functions 4.1 Description Pickup Measuring Element N N V 3 NE 1, N I 1 V 2 - V 3 I N V 3 NE 2, N I 2 V 3 - V 1 I N V 3 NE 3, N I 3 V 1 - V 2 I N V 3 NE 1, 2 I 1 V 2 - V 3 I 2 V 3 - V 1 2, 3 I 2 V 3 - V 1 I 3 V 1 - V 2 1, 3 I 1 V 2 - V 3 I 3 V 1 - V 2 1, 2, N I 1 V 2 - V 3 I 2 V 3 - V 1 I N V 3 NE 2, 3, N I 2 V 3 - V 1 I 3 V 1 - V 2 I N V 3 NE 1, 3, N I 1 V 2 - V 3 I 3 V 1 - V 2 I N V 3 NE 1, 2, 3 I 1 V 2 - V 3 I 2 V 3 - V 1 I 3 V 1 - V 2-1, 2, 3, N I 1 V 2 - V 3 I 2 V 3 - V 1 I 3 V 1 - V 2 I N V 3 NE Direction Determination of Phase Elements In the device, the directional overcurrent element operates for any faults either in forward direction or in reverse direction. The directional determination of phase elements works in the quadrature connection to prevent the loss of polarizing quantity for close-in phase faults. Each current element has a direction by a voltage derived from the other 2 phases. This connection introduces a 90 phase jump (current leading voltage) between reference voltages and operating quantities (currents). A fault is determined to be in the selected direction if its phase relationship lies within a quadrant of ± 85 on either side of the characteristic angle. It is hard-coded as +45. [dw_sfcmdipr , 5, en_us] Figure 4-9 Direction Determination of Phase Elements 3 V NE = V 1 + V 2 + V 3 (calculated value) 40 SICAM, Feeder Condition Monitor, Manual

41 Device Functions 4.1 Description i NOTE The undetermined area for the device MLFB 6MD2321-1AA00-1AA0 is 10 and the respective angles change accordingly. The undetermined area for the device MLFB 6MD2322-1AA00-1AA0 is 20 and the respective angles change accordingly Directional Ground Fault (Compensated/Resonant-Grounded) In the compensated/resonant-grounded system, the Petersen coil is configured to match the capacitive charging currents, such that when a ground fault occurs, a negligible fault current flows. The characteristic angle is set to 0. A boundary of +90 is used to detect the direction of the resistive component within residual currents. With the cos φ method, the watt-metric residual current is calculated in case of a fault. This method of determining the ground-fault detection is implemented in the watt-metric method. For more information about the watt-metric method, refer to Ground-Fault Detection with Cos ϕ/sin ϕ Measurement. In the vector method, the ground-fault detection occurs if the total current I N > is exceeded. The device calculates the active power of the zero sequence (P0) and if the value is falling in the 1st and the 4th quadrant, then the direction is forward. If the active power of the zero sequence (P0) is falling in the 2nd and 3rd quadrant, then the direction is shown as reverse. For more information about directional ground-fault parameters (compensated/resonant-grounded), see Figure A-8 and refer to the Process Parameters > Ground Connection menu. [dw_sfcmcore , 5, en_us] Figure 4-10 Directional Ground Fault (Compensated/Resonant-Grounded) for Vector Method i NOTE The undetermined area for the device MLFB 6MD2321-1AA00-1AA0 is 10 and the respective angles change accordingly. The undetermined area for the device MLFB 6MD2322-1AA00-1AA0 is 20 and the respective angles change accordingly. SICAM, Feeder Condition Monitor, Manual 41

42 Device Functions 4.1 Description Directional Ground Fault (Isolated) During ground fault on the isolated distribution system, no fault path is detected and subsequently no fault current flows. The phase-to-neutral capacitive charging current of the healthy phases for the entire system is supplied through the fault path. This produces a current that is used to detect the presence of the ground fault. It appears as a residual current which lags the residual voltage by 90. The characteristic angle is -90. The device calculates the reactive power of the zero sequence (Q0). If the value is falling in the 1st and the 2nd quadrant, then the direction is reverse. If the reactive power of the zero sequence (Q0) is falling in the 3rd and 4th quadrant, then the direction is shown as forward. For more information about directional ground-fault parameters (isolated grounded), see Figure A-8 and refer to the Process Parameters > Ground Connection menu. [dw_sfcmisea , 5, en_us] Figure 4-11 Directional Ground Fault (Isolated Grounded) for Vector Method i NOTE The undetermined area for the device MLFB 6MD2321-1AA00-1AA0 is 10 and the respective angles change accordingly. The undetermined area for the device MLFB 6MD2322-1AA00-1AA0 is 20 and the respective angles change accordingly Ground-Fault Direction for Solidly Grounded System The solidly grounded system is a common system arrangement in which the neutral is solidly connected to the ground. For the solid-grounded connection, the neutral-point displacement voltage is sufficient to measure and determine the directional information. This results in determining the ground-fault direction based on the rotation angle of the reference vector. 42 SICAM, Feeder Condition Monitor, Manual

43 Device Functions 4.1 Description [dw_sfcm_solideartheddirection, 4, en_us] Figure 4-12 Ground-Fault Direction for Solidly Grounded System i NOTE The undetermined area for the device MLFB 6MD2321-1AA00-1AA0 is 10 and the respective angles change accordingly. The undetermined area for the device MLFB 6MD2322-1AA00-1AA0 is 20 and the respective angles change accordingly. For more information about ground-fault direction of solidly-ground system, see Figure A-8 and refer to the Process Parameters > Ground Connection menu Ground-Fault Detection with Cos ϕ/sin ϕ Measurement The ground-fault detection with cos φ/sin φ measurement method is used to detect the ground fault based on the active part of the current (resonant system) or reactive part of the current (isolated system). The groundfault detection with cos φ/sin φ measurement method is enabled when the I dir (user-settable parameter for the resistive part of the ground current) parameter is configured to the values as in Table 4-9. If I dir is set to 0, the device detects the ground fault based on the vector method. The ground-fault detection with cos φ/sin φ measurement method is only applicable for resonant-grounded systems and isolated-grounded systems. If the ground current ((I N >) and the resistive current exceed the set threshold (I N > and I dir respectively) and if the time delay ti N > is greater than the set threshold, the device indicates a fault. If I dir is set to 0 (vector method), irrespective of the selected ground type connection, the total ground current is compared with the set current I N > for fault detection. For resonant-ground connections, if I dir is not 0 (ground-fault detection with cos φ/sin φ measurement method), the active part of the ground current is compared with I dir in addition to the total ground current and I N > for ground-fault detection. For isolated-ground connections, if I dir is not 0 (ground-fault detection with cos φ/sin φ measurement method), the reactive part of the ground current is compared with I dir in addition to the total ground current and I N > for ground-fault detection. For more information about I dir parameters, see Figure A-6 and refer to the Fault Parameters > Ground Fault Detection menu. SICAM, Feeder Condition Monitor, Manual 43

44 Device Functions 4.1 Description The following logic diagram illustrates the ground-fault detection with cos φ/sin φ measurement method. [dw_sfcm_wattmetricmethod, 2, en_us] Figure 4-13 Logic Diagram for Ground-Fault Detection with Cos φ/sin φ Measurement Method The following table displays the I dir range and the ground-fault detection with cos φ/sin φ measurement method status: Table 4-9 Ground-Fault Detection with Cos φ/sin φ Measurement Method Range I dir Range Status 0 Vector method is enabled 0.2 A to 30 A Ground-fault detection with cos φ/sin φ measurement method is enabled i NOTE In the solidly grounded system, set the I dir parameter to Determination of Repeated Phase Faults with Automatic Reclosing The device detects and records the repeated phase faults. A repeated phase fault is defined as the phase fault that occurs due to an automatic reclosing (AREC) as long as the SICAM FCM indicates the fault, that is, it has not been reset via one of the possible reset mechanisms yet. When a fault occurs, one of the 2 binary contacts is closed and gets latched (DO1 for forward fault direction and DO2 for reverse fault direction). For a subsequent phase fault, one of the 2 binary outputs opens for 100 ms and closes again afterwards. For every phase fault, the Modbus register (Address 24) is set for 3 s or until the fault current persists. If the fault current does not persist, the Modbus register is reset for 3 s. This logic is active only if the relays are not configured. For more information about the Modbus register, refer to Table B Intermittent Ground Fault The device detects and records the intermittent ground fault. An intermittent ground fault is defined as a fault that occurs intermittently within the fault reset time. The device records such faults in the intermittent ground-fault counter. For more information, see Intermittent Ground-Fault Counter, Page 133. During such faults, the respective binary contact operates for 25 ms (DO1 for forward fault direction and DO2 for reverse fault direction) and the intermittent ground-fault counter is incremented. 44 SICAM, Feeder Condition Monitor, Manual

45 Device Functions 4.1 Description Inrush-Current Detection/Blocking The device detects the presence of high level of 2nd harmonic current. For example, a transformer inrush current. If the 2nd harmonic current is greater than 15 % of the measured phase current of any of the 3 phases, the device does not issue a fault indication for the set threshold I>, ti>, I N >, and ti N >. If the fault persists for more than the configured CrossBlockTimer value, then the device displays a fault indication. The device does not block the fault indication if the fault current is above the set threshold I>> for the time ti>>. If the fault current persists for the respective time setting (ti> for phases, ti N > for ground), the inrush-current blocking function monitors the inrush current. The inrush current is detected by analyzing the magnitude of the 2nd harmonic components of the phase vectors. [lo_sfcminru , 3, en_us] Figure 4-14 Inrush-Current Detection Logic Diagram SICAM, Feeder Condition Monitor, Manual 45

46 Device Functions 4.1 Description i NOTE If the CrossBlockTimer value is set as 0, then the fault indication is not blocked in case of an inrush-current detection Primary Current Settings Based on the selected current-transformer type, the rated primary current parameter can be set from 50 A to 1000 A via the user interface or Modbus registers. After setting the parameters, connect the current inputs I 1, I 2 /I N, I 3 via low-power current transformers (LoPo CTs) or conventional current transformers (CT). For interfacing via conventional CTs, use a 1 A CT adaptor (MLFB 6MD2320-0AA10-1AA0) or a 5 A CT adaptor (MLFB 6MD2320-0AA20-1AA0). The LoPo CTs convert the primary current to a proportional output voltage. The device has a rated primary current setting of 300 A (@ 225 mv) Ground-Current Calculation For solidly-grounded systems, the ground currents are calculated from the vector sum of 3 phases. The ground current is also calculated for isolated/resonant-grounded systems, when the phase-current sensor for phase L2 is connected to the I 2 /I N terminal. If the ground-current sensor is connected to the I 2 /I N terminal, the ground current can be measured for isolated/resonant-grounded systems. When the ground current is measured, the ground current can be configured from 25 A to 150 A. For more information about the ground sensor, refer to Ground Sensor, Page 113. The calculation/measurement of the ground current is determined by setting the Ground-current acquisition parameter. i i i i NOTE When the cos φ/sin φ functionality is used in isolated or resonant-grounded systems, the deviation of the ground current (I dir ) calculated is within 3 A. NOTE For isolated systems, if the angle difference between V NE and I N is closer to 0, the deviation of the calculated ground current (I dir ) can be more than 3 A. NOTE For resonant-grounded systems, if the angle difference between V NE and I N is closer to 90, the deviation of the calculated ground current (I dir ) can be more than 3 A. NOTE When the ground-current calculation is used with the vector method, the deviation of the calculated ground current is 3 %. For more information about ground-current calculation, refer to Ground-Current Acquisition, Page SICAM, Feeder Condition Monitor, Manual

47 Device Functions 4.1 Description i NOTE For higher accuracy, Siemens recommends measuring the ground current in compensated/isolated systems Network Voltage Ratio In the medium-voltage applications, higher rated voltage sensors can be used in the system with lower rated voltages. For example, a 20-kV sensor can be used in a 10-kV primary voltage system. In this case, enter the appropriate sensor voltage ratio and primary voltage settings to display the correct network voltage as described in the following example: If the primary rated voltage is equal to the rated sensor voltage, set both the parameters, that is primary voltage and the sensor voltage as the primary rated voltage. For example, if a 20-kV sensor is used in the 20-kV system, set the primary voltage and the sensor voltage equal to 20 kv. Also when the primary rated voltage is lower than the rated sensor voltage, set the Primary voltage parameter equal to the primary rated voltage and the Sensor voltage parameter equal to the rated sensor voltage. For example, if a 20-kV sensor is used in the 10-kV system, set the primary voltage equal to 10 kv and the sensor rated voltage equal to 20 kv. i NOTE When the device with firmware version 2.00/2.10 is upgraded to firmware version 2.20 and above, check the Primary voltage and Sensor voltage parameters and adapt them accordingly Voltage Measurements with Sensors as per IEC and with Conventional Voltage Sensors The device can be used to measure voltages with the sensors as per IEC and with conventional voltage sensors by connecting the sensor outputs to the V 1, V 2, and V 3 terminals. The current inputs (I 1, I 2, and I 3 ) of the device are connected to the LoPo current sensors in the medium-voltage system. This function can be selected by configuring the primary voltage parameter to 3.25/ 3 or 100/ 3. The following figure shows how the device is connected to the sensors as per IEC or to the conventional voltage sensors. [dw_sfcmlopoctvt , 4, en_us] Figure 4-15 Voltage Measurement with Sensors as per IEC or with Conventional Voltage Sensors SICAM, Feeder Condition Monitor, Manual 47

48 Device Functions 4.1 Description Low-Voltage Measurement The device can be configured for low-voltage measurement. In the low-voltage system, 230 V is directly connected to the V 1, V 2, and V 3 terminals. The current terminals I 1, I 2, and I 3 are also connected in the lowvoltage system with appropriate current-transformer sensors. This function can be selected by configuring the Secondary Voltage parameter to 230 V. In this mode, the settings for primary voltage do not have any relevance. The following figure shows how the device is connected to the low-voltage system. [dw_sfcmlovomsrmt , 3, en_us] Figure 4-16 Low-Voltage Measurement Determination of Medium Voltage via Low-Voltage Measurements The voltages in the medium-voltage (MV) system are determined by measuring the voltages from the lowvoltage (LV) system. In this scheme, the voltage inputs (V 1, V 2, and V 3 ) of the device are connected to the secondary side of the transformer in the LV system and the current inputs (I 1, I 2, and I 3 ) of the device are connected to the LoPo current sensors in the medium-voltage system. The figure illustrates the transformer type (Dy-11) used in the medium-voltage/low-voltage measurement. For more information about transformer types, refer to Transformer Type, Page 104. [dw_sfcm_mv_lv_measurement, 3, en_us] Figure 4-17 Medium-Voltage/Low-Voltage Measurement This function can be selected by configuring the Secondary voltage parameter to By using this application, no additional VTs are necessary. The fault determinations are made with the help of LV-side voltage references. The device is able to detect the direction of phase faults and ground faults in solidly grounded MV networks. 48 SICAM, Feeder Condition Monitor, Manual

49 Device Functions 4.1 Description The primary voltages affected by transformer losses can be corrected by providing an offset in the Primary voltage correction parameter. For the Dy-11 transformer type, the secondary side of the transformer lags the primary side of the transformer by a phase of 330. As such the transformer angle is set to 330. If the Primary voltage parameter is not set to 400/ 3, the settings for transformer type, voltage correction, and transformer angle do not have any relevance. i NOTE Presently, the transformer-type options other than Dy-11 are not supported Voltage Measurement via Integrated Voltage-Detecting Systems The SICAM FCM (6MD2322-0AA10-1AA0) can be used to measure the primary voltages in a medium-voltage system by connecting to integrated voltage-detecting systems (VDS) with low resistance modified (LRM) interface. Both the SICAM FCM and VDS device are connected in parallel connections. For the current measurements, the inputs are provided via LoPo sensors or CT adaptor. [dw_sfcmcapvoltmsmrt , 1, en_us] Figure 4-18 SICAM FCM - Voltage Measurement in VDS The capacitances C1 and C2 are located internally to the RMU bushing and in the VDS device respectively. When the device is connected for the first time as per the scheme, you must calibrate the device via the HMI or Modbus to get the accurate voltage measurements. Auto Calibration You must calibrate the device when it is connected in the VDS system. You can calibrate the device via the HMI or Modbus. i NOTE The auto calibration can be performed when there is no fault condition. To auto calibrate the device at rated network voltage, proceed as follows. ² Set the rated primary voltage with HMI or Modbus (Address 10). ² Set the auto calibration primary voltage with HMI or Modbus (Address 49). The auto calibration voltage is the actual primary voltage calibrated during the auto calibration. ² Navigate to Process Parameters > Auto calibration. - or - SICAM, Feeder Condition Monitor, Manual 49

50 Device Functions 4.1 Description ² Alternately, auto calibration can be done by turning on the Modbus coil Address 9. [dw_sfcmdevautocalib, 1, en_us] Figure 4-19 VDS Device Auto Calibration ² Press OK to start the auto calibration. The auto calibration takes about 60 s to complete. The following dialog appears: [dw_sfcmdevautocalib_msg, 1, en_us] Figure 4-20 Device Auto Calibration Energy Measurement The device provides counters in the Modbus registers to acquire the following data: Active import energy Active export energy Reactive import energy Reactive export energy The values are kept when the device is powered off or in sleep mode. The counter starts incrementing from the last stored value once the device is powered on. For more information about these counters, refer to 3-Phase Active Import Energy Counter, Page 124. The counter value can be reset by any one of the following methods: Using the Energy counter reset parameter via HMI Using the Energy counter reset Modbus register. For more information, refer to Table B RTC Synchronization The device provides an internal real-time clock. In order to get an external time synchronization, the device must be synchronized with the Modbus master with the current system time. The real-time clock must be synchronized at least once a day for a valid time stamp. The device needs a time synchronization, when it resumes from the sleep mode to ensure the correct time and date. Also the time synchronization is required when the device is powered on after 8 hours of sleep mode. 50 SICAM, Feeder Condition Monitor, Manual

51 Device Functions 4.1 Description Remote Firmware Updates The firmware can be updated remotely via the Modbus/RS485 interface when it is connected to SICAM CMIC RTU. The firmware update is only possible with baud rates ranging from 4800 bps to bps. For more information, refer to the following CMIC RTU documents: [ENGLISH] Document Number: DC Common Functions Modbus [GERMAN] Document Number: DC Gemeinsame Funktionen Modbus You can download the latest firmware from the SICAM FCM internet site (Power Quality and Measurements, Feeder Condition Monitor: SICAM FCM, Download: Firmware and Device Drivers). i i i NOTE Configure or check the newly added parameters at least once after the remote firmware update is completed. NOTE For updating the firmware via the SICAM FCM Configurator tool, refer to the SICAM FCM Configurator Manual. NOTE The fault LED (red color) of the device blinks during the firmware download. It takes around 10 minutes to complete the firmware download Password Menu Access The device parameter menu access can be protected by a password. For activating the Battery Freshness Mode (BFM), the password is not required to access the home screen. The user can change the password by using the Change Password parameter in HMI only. The password can be disabled/enabled by using the Password Protection parameter in HMI. [dw_sfcmpassmenuaccess , 1, en_us] Figure 4-21 Password Menu Access The password can be reset to the default password 1111 by resetting the password in the Modbus register. Menu navigation is not allowed after 10 wrong attempts. After 10 wrong attempts, reset the password to the default value. The password cannot be reset through the HMI. SICAM, Feeder Condition Monitor, Manual 51

52 Device Functions 4.1 Description After entering the correct password, you can access the parameters menu. If no key has been pressed during 30 minutes, the parameter menu is closed and the home screen is displayed. In the battery mode, changing the password is not allowed. i i NOTE The password has 4 digits. Each digit ranges from 0 to 9. The password 0000 is invalid. NOTE By default, the password protection is disabled Device Alerts The device can detect and indicate overvoltage alarms and warnings, undervoltage alarms and warnings, and overcurrent alarms and warnings when it is in service. The device alerts are communicated via Modbus and displayed on the user interface. The alerts reset automatically when the current/voltage falls below the threshold levels again or exceeds them again in case of an undervoltage. Undervoltage Alarm and Undervoltage Warning The undervoltage alerts are enabled when the system voltage falls below the user-defined setting (V min Alarm/V min Warning). The threshold is defined in percentage of rated primary voltage. For more information about the undervoltage alarm and undervoltage warning, see Figure A-6 and refer to the Fault Parameters > Undervoltage Warning and Undervoltage Alarm menu. Overvoltage Alarm and Overvoltage Warning The overvoltage alerts are enabled when the system voltage exceeds the user-defined settings (V max Alarm/ V max Warning). The threshold is defined in percentage of rated primary voltage. For more information about the overvoltage alarm and overvoltage warning, see Figure A-6 and refer to the Fault Parameters > Overvoltage Warning and Overvoltage Alarm menu. Overcurrent Alarm and Overcurrent Warning Overcurrent warning and overcurrent alarm is applicable to phase current I 1, I 2, and I 3 only. The overcurrent alerts are enabled if the system current exceeds the user-defined setting (I max Alarm/I max Warning) and persists for a user-defined time (overcurrent alarm time/overcurrent warning time). The overcurrent warning and overcurrent alarm resets when the current falls below the threshold with a hysteresis of 5 % of rated primary current. For example, if the warning threshold is set to 500 A, the device resets the alert if the current falls below 485 A for a rated primary current of 300 A (15 A is 5 % of 300 A). For more information about the overcurrent alarm and overcurrent warning, see Figure A-6 and refer to the Fault Parameters > Overcurrent Warning and Overcurrent Alarm menu. i NOTE Configure the overcurrent threshold for current settings (I max Alarm/I max Warning) such that the difference between the 2 settings is at least 10 % of the rated primary current to display an appropriate alert for an alarm or warning. 52 SICAM, Feeder Condition Monitor, Manual

53 Device Functions 4.1 Description i i i NOTE Configure the overvoltage threshold for voltages (V max Alarm/V max Warning) and the undervoltage threshold for voltages (V min Alarm/V min Warning) such that the difference between the 2 settings is at least 2 % of the rated primary voltage to display an appropriate alert for an alarm or warning. NOTE If you set the threshold for an undervoltage alarm (V min Alarm), undervoltage warning (V min Warning), overvoltage alarm (V max Alarm), and overvoltage warning (V max Warning) closer to the primary voltage and if a frequency change occurs (> 0.2 Hz), a false indication of the undervoltage alarm, undervoltage warning, overvoltage alarm, and overvoltage warning can occur. NOTE The overvoltage alarm/warning resets after a delay of 10 s when the voltage falls below the configured threshold. The undervoltage alarm/warning resets after a delay of 10 s when the voltages are above the configured threshold or below 50 % of the primary voltage Archive Logging An archive log is composed of: Event logs The device stores 20 faults as event logs on the non-volatile memory. The event logs consists of time stamps and fault current values. The event log is designed as a ring buffer where the new fault always overwrite the oldest stored event. Due to the watchdog timer reset, the Device Error Event is also saved. For the device error event, in Modbus the Current values are shown as 0. In HMI, the message Device error watchdog timer reset is displayed without showing the phase-current values. Trailing pointers The minimum and maximum values of current are archived every 15 minutes, 30 minutes, 45 minutes, 1 hour, 24 hours, 1 month, and 1 year. For more information about the parameters of archive logging, see Figure A-3 and refer to the Events and Trailing Pointers menu. i NOTE When the device is powered on from the sleep mode, the date and time display format is , 00:00:00. The Modbus registers for date and time are set as invalid Battery Freshness Mode The Battery Freshness Mode (BFM) prevents discharging of the battery until the device is powered on and used for the first time and enhances the battery life. When the device is shipped, BFM is enabled to avoid the discharge of the battery power during shipping and storage. During installation and commissioning, the BFM is automatically disabled when the device is powered on from an external power supply for the first time. To activate the BFM mode, it is mandatory to disconnect the power source. By selecting the BFM mode, the device stops all the routine operations until the power supply is reconnected. SICAM, Feeder Condition Monitor, Manual 53

54 Device Functions 4.1 Description i i NOTE If the device is temporarily connected to the auxiliary voltage only, activate the BFM mode every time before switching off the auxiliary voltage to avoid discharge of the battery. NOTE If the device battery has not been used for a long period of time, it is recommended to power OFF the device for an hour at periodic intervals of 6 months and to run it in battery mode. To enable BFM in the device, proceed as follows: ² In the Home Screen, press the BFM key. The Battery freshness menu appears. [dw_sfcmbfmhm , 2, en_us] Figure 4-22 Home Screen ² In the Battery freshness menu, enable the BFM mode by pressing the OK key. Press the Esc key to return to the Home Screen. [dw_sfcmbfmbf , 2, en_us] Figure 4-23 Battery Freshness The Remove Power Source menu appears. ² In the Remove Power Source menu, disconnect the auxiliary voltage to enable the BFM mode. [dw_sfcmbfmrps , 2, en_us] Figure 4-24 Remove Power Source 54 SICAM, Feeder Condition Monitor, Manual

55 5 Technical Data 5.1 Device Technical Data 56 SICAM, Feeder Condition Monitor, Manual 55

56 Technical Data 5.1 Device Technical Data 5.1 Device Technical Data Technical Data Medium-voltage and low-voltage application range 0.4 kv to 36 kv Frequency range 45 Hz to 65 Hz Auxiliary power-supply voltage range DC 24 V to DC 110 V (±10 %) AC 230 V (±20 %) Integrated back-up battery Battery lifetime for 15 years Measuring Inputs for Voltage (MLFB 6MD2321-1AA00-1AA0) Rated voltage ph-n Internal impedance AC 3.25/ 3 V, AC 100/ 3 V, AC 230 V 200 kω Measuring Inputs for Voltage (MLFB 6MD2322-0AA10-1AA0) Measuring range Internal impedance 3 V to 50 V 20 MΩ Measuring Inputs for Current (according to IEC ) Low-power current sensor (phase current) Rated voltage Internal impedance Measuring range Low-power current sensor (ground current) Rated voltage Internal impedance Load capacity thermal (current inputs) 1 A to 9999 A, depending on the current-sensor ratio 225 mv > 20 k Ω 0 V to 2.5 V 0.2 A to 600 A, depending on the ground-sensor ratio 225 mv > 20 kω 4.5 Vrms (continuous) Measured-Value Accuracy Measured Variable Accuracy-Class Dependence to IEC : (K55) Voltage V 4 1 % Phase current I Apparent power (S) 3 % Reactive power (Q) 3 % Active power (P) 3 % Power factor 3 % Frequency f (47 Hz to 53 Hz/57 Hz to 63 Hz) 1 % Energy measurement accuracy 1 % for MLFB 6MD2322-0AA10-1AA0, for secondary VDS voltage at 30 V 1 A or 1 % at rated frequency 1 % for a duration of 1 h i NOTE When the device is powered-on for the first time, the voltage and current signals require a stabilization time (25 s) for displaying values within the expected accuracy range. Similarly, when the rated frequency of either voltage or current signals changes, the device takes up to 25 s to display. 4 When using a 100/ 3 sensor, the accuracy of voltage measurements can be up to 3 % for MLFB 6MD2321-1AA00-1AA0. 56 SICAM, Feeder Condition Monitor, Manual

57 Technical Data 5.1 Device Technical Data i i NOTE The accuracies of the voltage inputs connected to a VDS device are declared at an ambient temperature ( 25 C). For every 10 C rise in temperature, the accuracies get impaired. NOTE The frequency measurements start after a delay of 12 s when the device is connected to a power system. Measured Ground-Current Accuracy for Isolated/Resonant Connection Measured Variable Accuracy-Class Dependence to IEC : (K55) I N setting Setting value 0.4 A to 0.9 A 1 A to 2000 A Measuring range 0.2 A to 15 A 1 A to 1200 A Accuracy (for standard ground-current ratio of 60 A primary) ±0.05 A for current range 0.2 A to 1 A ±0.25 A for current range 1 A to 49 A ±10 % for current range 1.1 A to 15 A ±1 % for current range 50 A to 1200 A i i NOTE For grounded systems, the accuracy of the calculated ground current is 3 %. NOTE The device parameter for ground-fault detection I N > ranges from 0.4 A to 2000 A. The accuracy of measurements differs based on the threshold value set. When the ground-fault detection is disabled (I N > is 0), the measuring range for the ground current varies from 0.2 A to 15 A. Communications RS485 Interface Electrical interface Connection type Supported communication protocol Functionality RS485 Connection type terminal block with spring type terminals Modbus RTU Baud rate (bps) 2400, 4800, 9600, 19200, 38400, 57600, Data format Slave Default value: bps 8N1, 8E1, 8O1 Supported address area 1 to 247 Default value: 8N1 Default value: 247 Digital Inputs Number 1 External operating voltage DC 24 V to DC 30 V continuous signal DC 30 V to DC 60 V periodic 0.5 s ON time and 4.5 s OFF time SICAM, Feeder Condition Monitor, Manual 57

58 Technical Data 5.1 Device Technical Data Digital Outputs Number 2 Type Dry contact Maxiumum switching capacity 2000 VA (AC, resistive) 240 W/30 V DC (DC, resistive) Permissible current per contact (continuous) 8 A Permissible current per contact (switching) 8 A Dimensions Type of fixing Cut-out (W x H) Overall depth Permissible switch panel thickness for installation Mounting position Weight Panel flush mounting mm x mm mm 2 mm to 4 mm Horizontal 500 g Environment Operating temperature range -40 C to +70 C Storage temperature range -25 C to +55 C Humidity range 0 to 95 %, non-condensing Altitude above sea level Maximum up to 2000 m Protection Device Class Device front IP 40 Device rear IP 20 Power Consumption DC 24 V/AC 230 V Peak power during power on 0.8 W 6.0 W i NOTE When the auxiliary power supply fails, the device is switched on with an internal battery. In this low-power mode the device has limited functionality. In the low-power mode, you can reset a fault, set parameters, and view events/records. In this mode, measurements, fault detection, and communication functions are not available. 58 SICAM, Feeder Condition Monitor, Manual

59 6 Type Testing 6.1 Type Testing 60 SICAM, Feeder Condition Monitor, Manual 59

60 Type Testing 6.1 Type Testing 6.1 Type Testing Climatic Stress Tests Table 6-1 Temperatures Standards IEC and IEC Type tested (acc. to IEC and IEC , Test bed, for 16 h) Permissible temporary operating temperature (tested for 96 h) -50 C to +85 C -40 C to +70 C 5 Limiting temperatures for storage and transport -25 C to +55 C Storage and transport in factory packaging Table 6-2 Humidity Permissible humidity 95 % relative humidity Siemens recommends installing the devices in a place where they are not exposed to direct sunlight or great temperature variations that could lead to condensation. Electrical Tests Table 6-3 Insulation Test Standards Insulation test between auxiliary power-supply terminals (L, N), communication channels, DI, DO connected together and ground, all voltage, current channels connected together Insulation test between auxiliary power- supply terminals (L, N) and all DI, DO terminals connected together Insulation test between communication channels and DI terminals Insulation test between communication channels and DO terminals Insulation test between the binary outputs and the binary inputs Insulation test between auxiliary power supply terminals (L, N) and communication channels connected together Insulation test between communication channels and voltage terminals connected together IEC and IEC (High Voltage Test Level) 2.5 kv 4 kv 2.5 kv 6.4 kv 1.39 kv 2.5 kv 3.88 kv 7.15 kv 3.5 kv 6.4 kv IEC and IEC (Impulse Test Level) 5 Below -25 C, the legibility of the display can be impaired. 60 SICAM, Feeder Condition Monitor, Manual

61 Type Testing 6.1 Type Testing Mechanical Tests Table 6-4 Mechanical Tests Standards IEC Vibration response test IEC , Class 1 Vibration withstand test IEC , Class 1 Shock response test IEC , Class 1 Shock withstand test IEC , Class 1 Sinusoidal 10 Hz to 150 Hz: ± mm amplitude, 0.5 g acceleration, frequency sweep rate 1 octave/min, 1 cycle in 3 orthogonal axes Sinusoidal 10 Hz to 150 Hz: ± mm amplitude, 1 g acceleration, frequency sweep rate 1 octave/min, 20 cycles in 3 orthogonal axes Acceleration 5 g, duration 11 ms, 18 shocks each in both directions of the 3 orthogonal axes Acceleration 15 g, duration 11 ms, 18 shocks each in both directions of the 3 orthogonal axes EMC Tests for Immunity (Type Tests) Table 6-5 Immunity Test Standards Electrostatic discharge, IEC , Class III Irradiation with amplitude-modulated HF field, IEC , Class III Fast transient disturbance variables/burst, IEC , Class III High-energy surge voltages installation, IEC , Class III Line-conducted HF, amplitude-modulated, IEC , Class III Power frequency magnetic field, IEC , Class IV Voltage dips as per IEC , IEC Slow damped oscillatory wave test, IEC Tests performed as per the product standard IEC and IEC kv air discharge and 6 kv contact discharge 80 MHz to 1 GHz and 1.4 GHz to 2.7 GHz (10 V/m, Criteria B) ± 4 kv on auxiliary power supply, current input, I/O ports, and voltage input ± 2 kv on communication port ± 2 kv DM, ± 4 kv CM on power port and voltage input ± 1 kv DM, ± 2 kv CM on binary input and binary output ± 4 kv on current input ± 2 kv on communication 150 khz to 80 MHz (10 V) on auxiliary power supply, measuring inputs, binary inputs, relay outputs, and communication ports 30 A/m (continuous) and 300 A/m pulsed (3 s) on the X, Y, Z axis of the product 0 %, 40 %, and 70 % dips on AC power supply as well as DC power supply 2.5 kv (CM), 1.0 kv (DM) applied on current inputs, voltage input, binary inputs, binary outputs, communication ports 1 MHz, 100 khz SICAM, Feeder Condition Monitor, Manual 61

62 Type Testing 6.1 Type Testing EMC Tests for Noise Emission (Type Tests) Table 6-6 Noise Emission Standards IEC and CISPR 11/22 Radio noise voltage on lines, only auxiliary voltage 150 khz to 30 MHz (Class A) IEC-CISPR 11 Radio noise field strength 30 MHz to 1 GHz (Class A) IEC-CISPR SICAM, Feeder Condition Monitor, Manual

63 7 Connection Diagrams 7.1 Connection Diagrams Installing the Device Sensor Connections Modbus Connection of SICAM FCM with RTU 72 SICAM, Feeder Condition Monitor, Manual 63

64 Connection Diagrams 7.1 Connection Diagrams 7.1 Connection Diagrams This chapter describes the various possibilities to connect the device to the medium-voltage system. Fault Passage Indicator The device can be used as a dedicated Fault Passage Indicator (FPI) by using only the 3 current inputs. No directional fault information is provided in this scheme. [dw_sfcmfpi , 3, en_us] Figure 7-1 SICAM FCM as Fault Passage Indicator i NOTE In this connection scheme, the accuracy of ground-current measurements cannot be guaranteed for isolated/resonant ground connection. Ground-Fault Indicator The device can be used as a dedicated ground-fault indicator by using the ground-current sensor. The following scheme shows how the device works as a non-directional ground-fault indicator (50 G). Fault Detector [dw_sfcm_grdfltindi, 2, en_us] Figure 7-2 SICAM FCM as Ground-Fault Indicator The device can be used as a fault detector by providing fault information with directional information. This requires an additional low-power voltage transformer of 3.25/ 3 V or 100/ 3 V sensors in the medium-voltage system or a direct connection to 230 V or when it is connected in the VDS. 64 SICAM, Feeder Condition Monitor, Manual

65 Connection Diagrams 7.1 Connection Diagrams For more information about VDS, refer to Voltage Measurement via Integrated Voltage-Detecting Systems. 3 Low-Power Voltage Sensor, 3 Low-Power Current Sensor In a medium-voltage system, the device is connected to the voltage inputs V 1, V 2, and V 3 via low-power voltage transformers of 3.25/ 3 V or 100/ 3 V. The 3 low-power current sensors are connected to the current inputs I 1, I 2, and I 3. This scheme is used for a solidly grounded system and the I N value is calculated. [dw_sfcmcon , 3, en_us] Figure 7-3 SICAM FCM as Fault Detector 3 Low-Power Voltage Sensors and Current Sensors with 3 Phase Currents for MLFB 6MD2321-1AA00-1AA0 In a medium-voltage system, the device is connected to the voltage inputs V1, V2, and V3 via the 4 V to 30 V VDS system. The 3 low-power current sensors are connected to the current inputs I 1, I 2, and I 3. These connection diagrams are used for a solidly grounded system and the I N value is calculated. [dw_sfcmcon , 1, en_us] Figure 7-4 SICAM FCM as Fault Detector 3 Low-Power Voltage Transformer and Current Transformer with 3 Phase Currents for MLFB 6MD2322-1AA00-1AA0 3 Low-Power Voltage Sensor, 2 Phase Current, and Sensitive Ground-Current Sensor In a medium-voltage system, the device is connected to the voltage inputs V 1, V 2, and V 3 via low-power voltage sensors of 3.25/ 3 V or 100/ 3 V. The 3 low-power current sensors are connected to I 1, I 2 /I N, I 3 with I N connected to the sensitive ground-current sensors. This scheme is used for isolated/resonant-grounded systems and the I 2 value is calculated. SICAM, Feeder Condition Monitor, Manual 65

66 Connection Diagrams 7.1 Connection Diagrams [dw_sfcmvtphcsgc , 3, en_us] Figure 7-5 SICAM FCM as Fault Detector 3 Low-Power Voltage Sensor with 2 Phase Currents and Sensitive Ground-Current Sensor for MLFB 6MD2321-1AA00-1AA0 In a medium-voltage system, the device is connected to the voltage inputs V1, V2, and V3 via 4 V to 30 V VDS system. The 3 low-power current sensors are connected to I 1, I 2 /I N, I 3 with I N connected to the sensitive ground-current sensors. These connection diagrams are used for isolated/resonant-grounded systems and the I 2 value is calculated. [dw_sfcmvtphcsgc , 1, en_us] Figure 7-6 SICAM FCM as Fault Detector 3 Low-Power Voltage Transformer with 2 Phase Currents and Sensitive Ground-Current Sensor for MLFB 6MD2322-1AA00-1AA0 i NOTE During electrical installation, all the rules and regulations of power systems must be observed. Low-Voltage (230 V) Measurement For more information about low-voltage (230 V) measurement, see Low-Voltage Measurement. Medium-Voltage/Low-Voltage Measurement For more information about medium-voltage/low-voltage measurement, see Determination of Medium Voltage via Low-Voltage Measurements. 66 SICAM, Feeder Condition Monitor, Manual

67 Connection Diagrams 7.2 Installing the Device 7.2 Installing the Device ² Use the correct polarity before connecting to an auxiliary DC voltage. ² Check and verify all terminals for proper connections. ² Check the polarities and phase connections of all instrument transformers. ² Before energizing with supply voltage, place the device in the operating environment for at least 2 hours to avoid humidity and condensation problems. i i NOTE Ensure that the terminal 1 of the device is properly grounded with the ground wire provided. NOTE If the device is commissioned after a long period of time, make sure to run a power ON-OFF sequence and keep the device in the OFF condition for an hour. SICAM, Feeder Condition Monitor, Manual 67

68 Connection Diagrams 7.3 Sensor Connections 7.3 Sensor Connections The following table shows how the current and voltage sensors are designated as per the terminals. [dw_sfcmtrml , 3, en_us] Figure 7-7 Terminal Diagram [ph_current_sensor_wires, 1, --_--] Figure 7-8 Phase-Current Sensors Cable Leads (Red/Black) [ph_voltage_sensor_wires, 1, --_--] Figure 7-9 Phase-Voltage Sensors Cable Leads (Black/Brown) 68 SICAM, Feeder Condition Monitor, Manual

69 Connection Diagrams 7.3 Sensor Connections Table 7-1 Sensor Connections Sensor Phase Wire Color Terminal Pin Assignment Current L1/A Red 13 + (S1) Current L1/A Black 14 Neutral (S2) Current L2/B Red 15 + (S1) Current L2/B Black 16 Neutral (S2) Current L3/C Red 17 + (S1) Current L3/C Black 18 Neutral (S2) Voltage L1/A Brown 19 + Voltage L1/A Black 20 Neutral Voltage L2/B Brown 21 + Voltage L2/B Black 22 Neutral Voltage L3/C Brown 23 + Voltage L3/C Black 24 Neutral i NOTE The wire colors shown are valid for standard sensors only. Follow the instructions of the sensors you use. Power-Flow Direction The following figure shows the power-flow direction from P1 to P2. [le_sfcm_powflodir , 1, --_--] Figure 7-10 (1) Power-Flow Direction from P1 to P2 Table 7-2 Power-Flow Direction Parameters for Solidly-Grounded Systems Phase I 1 power-flow direction I 2 /I N power-flow direction I 3 power-flow direction Parameter Value Not reversed Not reversed Not reversed Table 7-3 describes the power-flow direction parameters for the isolated/compensated-grounded systems. SICAM, Feeder Condition Monitor, Manual 69

70 Connection Diagrams 7.3 Sensor Connections Table 7-3 Power-Flow Direction Parameters for Isolated/Compensated-Grounded Systems Phase I 1 power-flow direction I 2 /I N power-flow direction I 3 power-flow direction Parameter Value Not reversed Reversed Not reversed i NOTE Table 7-2 and Table 7-3 show the settings recommended by Siemens. You can change the power-flow direction according to your applications. Current-Sensors Grounding Connection [dw_sfcm_cursen_grndconn, 5, en_us] Figure 7-11 Current-Sensors Grounding Connection 70 SICAM, Feeder Condition Monitor, Manual

71 Connection Diagrams 7.3 Sensor Connections Voltage Sensors Grounding Connection [dw_sfcm_voltsen_grndconn_290415, 4, en_us] Figure 7-12 Voltage Sensors Grounding Connection i NOTE Always ensure that the protective ground (terminal 1) of SICAM FCM is grounded in the RMU panel with a short cable size 2.5 mm 2. SICAM, Feeder Condition Monitor, Manual 71

72 Connection Diagrams 7.4 Modbus Connection of SICAM FCM with RTU 7.4 Modbus Connection of SICAM FCM with RTU The following figure shows how the RS485 port of SICAM FCM is connected with the Remote Terminal Unit (RTU). [dw_sfcmcmicmodconn , 4, en_us] Figure 7-13 SICAM FCM Modbus Connection with RTU Table 7-4 Modbus Connection with RTU SICAM CMIC SICAM FCM Pin Assignment Interface X3 Terminal 4 5 A/- Terminal 5 6 B/+ Terminal 6 4 COM/0 V 72 SICAM, Feeder Condition Monitor, Manual

73 Connection Diagrams 7.4 Modbus Connection of SICAM FCM with RTU Modbus Connection The following figure shows the Modbus connection with SICAM CMIC, SICAM FCM, and the Motor Control Unit (MCU). [dw_sfcm_cmic_fcm_mcu, 3, en_us] Figure 7-14 Modbus Connection with SICAM FCM and MCU The following S2 DIP switch settings show the mode of operation of RS485 on MCU. S2-2 S2-1 Description OFF OFF 2W: No bus termination OFF ON 2W: With bus termination SICAM, Feeder Condition Monitor, Manual 73

74 Connection Diagrams 7.4 Modbus Connection of SICAM FCM with RTU Modbus Shielding and Grounding The following figure shows how the Modbus shielding and grounding is made between SICAM CMIC and SICAM FCM. [dw_sfcm_mod_shld_grnd_trmn , 4, en_us] Figure 7-15 Modbus Shielding and Grounding Connection Modbus Termination [dw_fcm_modtrmn , 4, en_us] Figure 7-16 Modbus Termination i NOTE SICAM FCM has no internal Modbus load resistor. If SICAM FCM is located at the end of the Modbus connection, use an external resistor for Modbus termination. 74 SICAM, Feeder Condition Monitor, Manual

75 A Parameterization A.1 Parameterization 76 A.2 Parameterizing the User Interface 77 A.3 Editing the Device Settings 83 SICAM, Feeder Condition Monitor, Manual 75

76 Parameterization A.1 Parameterization A.1 Parameterization This chapter describes the various parameter menus and the possible parameter settings that can be executed via the user interface. Parameters can also be set remotely by using the RS485/Modbus interface. The parameters are stored in the respective Modbus registers. For more information about Modbus, see B.1 Modbus Registers Display and User Controls The device menu screen contains the following user interface elements: [dw_sfcmdeflcdscrn , 2, en_us] Figure A-1 Default Menu with Display and User Controls (1) Header area (2) Display area (3) Footer area Header The header area displays the title and status of the feeder. Display The display area shows the default measured values, such as currents, voltages, power, and frequency. Footer The footer area contains the respective menu navigation functions. You can navigate through the menu using the keypads by selecting a value or editing the device settings. The following functions are assigned to the navigation keys: Battery Freshness Mode (BFM) Enables the Battery Freshness Mode. For more information, see Battery Freshness Mode MENU OK Calls the main menu Opens the submenu from the selected main menu Save Edit Permanently saves the last set value and returns from edit mode to display mode Opens the edit mode of the device settings The up and down arrow is used to move the cursor. It is also used to scroll within the menu list and for selecting or entering numerical values. You can also parameterize the device using the SICAM FCM Configurator tool. For more information, refer to the SICAM FCM Configurator Manual. 76 SICAM, Feeder Condition Monitor, Manual

77 Parameterization A.2 Parameterizing the User Interface A.2 Parameterizing the User Interface This chapter describes the default menu and the possible parameter settings that you can perform with the user interface. Default Menu The default menu displays the phase currents I 1, I 2, I 3, and the ground current I N, the voltage values V 1, V 2, V 3, and the frequency. By navigating with the keys, you can view the following parameters. Phase-to-phase voltages or the active power Reactive power Apparent power 3-phase active power Reactive power Apparent power The default menu also displays the power-flow direction and status of the feeder. [dw_sfcmdefscreen , 3, en_us] Figure A-2 Default Menu SICAM, Feeder Condition Monitor, Manual 77

78 Parameterization A.2 Parameterizing the User Interface Parameterization Menu Structure The parameterization menu structure displays the main menu and the relevant submenu functions. [dw_sfcmpara , 3, en_us] Figure A-3 Parameters Menu Structure [dw_sfcm_fault_param , 2, en_us] Figure A-4 Parameters Menu Structure - Phase-Fault Detection 78 SICAM, Feeder Condition Monitor, Manual

79 Parameterization A.2 Parameterizing the User Interface [dw_sfcm_fault_param , 4, en_us] Figure A-5 Parameters Menu Structure Ground-Fault Detection SICAM, Feeder Condition Monitor, Manual 79

80 Parameterization A.2 Parameterizing the User Interface [dw_sfcm_fault_param , 2, en_us] Figure A-6 Parameters Menu Structure Alerts and Warnings [dw_sfcm_relay_config, 1, en_us] Figure A-7 Parameters Menu Structure Relay Configuration 80 SICAM, Feeder Condition Monitor, Manual

81 Parameterization A.2 Parameterizing the User Interface [dw_sfcmpara , 8, en_us] Figure A-8 Parameters Menu Structure SICAM, Feeder Condition Monitor, Manual 81

82 Parameterization A.2 Parameterizing the User Interface [dw_sfcm_param_dev, 4, en_us] Figure A-9 Parameters Menu Structure i NOTE The device resets if one of the following parameters is changed: Frequency Neutral-point treatment Baud rate Parity Ground-fault detection I N >, when the parameter is changed above or below the threshold of 1 A Ground-current acquisition (calculation/measurement) 82 SICAM, Feeder Condition Monitor, Manual

83 Parameterization A.3 Editing the Device Settings A.3 Editing the Device Settings This chapter describes with an example how to edit and set the device parameters. To edit the phase-current threshold value settings, proceed as follows: ² On the default menu, select Menu. The Menu appears. ² Navigate to the Fault Parameters menu and press OK. The Phase Fault Detection I>> menu with the different phase-fault parameters appears. ² Navigate to Phase Fault Detection I>> and press OK. The Saved I >> menu appears. ² In the Saved I >> menu, press Edit>. The New I>> menu appears. ² In the New I >> menu, press the up arrow or the down arrow to set the New I>> value within the desired range. ² Press Save> to save the new Phase Fault Detection I>> value. i NOTE To navigate from one value to another value, use the left arrow and right arrow. For entering values, for example, from 0 A to 2500 A, press the up arrow or the down arrow. ² Press Esc if you want to cancel the edit mode and to return to the display mode. All the saved values are discarded. [dw_sfcmeditparaset, 3, en_us] Figure A-10 Editing Phase-Protection Settings SICAM, Feeder Condition Monitor, Manual 83