Smart Energy & Power Quality Solutions. Residual current monitoring (RCM) and energy data acquisition in a single device

Smart Energy & Power Quality Solutions Residual current monitoring (RCM) and energy data acquisition in a single device

The RCM system solution RCM Modbus GridVis Analysis software Harmonics Alarm management 20 current channels Modern energy data management, PQ and residual current monitoring Complete system solution The scalability of our products and solutions leaves room for future scope All key components are optimally tailored to each other from a single source Product range UMG 20CM Residual current and energy measurement device with 20 current measuring channels UMG 96RM-E Energy measurement device with RCM measurement (6 current measuring channels) Current transformer broad spectrum of residual current transformers Transformer strips with 6 channels Feedthrough current transformers Split-core current transformers for retrofit installation without operational interruptions GridVis analysis software in Basic, Professional, Enterprise and Service editions Page 2

UMG 20CM & UMG 96RM-E RCM & energy data acquisition The contents of this brochure: Possible applications I Page 4 The system I Page 6 Your benefits I Page 8 The principle I Page 9 UMG 20CM energy and residual current measurement device with 20 current channels I Page 10 Significant product features I Page 11 Typical application cases I Page 11 Technical data UMG 20CM I Page 13 UMG 96RM-E with 6 current measuring channels I Page 14 Technical data UMG 96RM-E I Page 15 Residual current transformer I Page 16 GridVis analysis software I Page 18 Example application - data centre, bank head office I Page 19 Summary I Page 23 One system threefold benefits Janitza measuring systems are outstanding due to their high degree of scalability and the integration of the three subject areas Energy measurement Power quality Residual current measurement (RCM) within a single monitoring system. Janitza offers one of the most comprehensive ranges of energy and power quality measurement products in the world. With this we can create an individual solution tailored to suit your every requirement - and optimally match the software and hardware components to one another. Our customers have been measuring and managing their electrical energy with Janitza systems for almost thirty years! Page 3

Possible applications Residual current monitoring (RCM) is playing an increasingly important role in applications with a demand for highavailability power supplies. Possible applications can be found in almost every market segment. Constant processes and highly sensitive applications in areas such as data centres, hospitals and semiconductor factories in particular are based on RCM monitoring. Everywhere, where isolation resistance and residual current circuit breakers cannot be realised for local or operational reasons, RCM measurement constitutes a good alternative. Avoid supply tripping Prevent production downtimes Reduce energy consumption (ISO 50001) Safeguard traffic flows Monitor highavailability energy distribution Page 4

UMG 20CM & UMG 96RM-E RCM & energy data acquisition 3 1Janitza GridVis software, measurement devices and components unite 3 solutions - energy management, in power quality monitoring and high electrical availability - within a common system environment. Energy data acquisition (EnMS per ISO 50001) RCM residual current monitoring 3 solutions integrated into a single system PQ monitoring for the optimisation of supply security Database connection Operating current A Residual current ma Page 5

The system Power supply without tripping TN-S systems are mandatory with new systems. In the case of older TN-C-S systems, upgrading to TN-S is recommended. The functionality of TN-S systems can be permanently monitored and recorded with Janitza RCM solutions. This requirement constitutes a key function in many industries and application areas for the safety and economic success of the company. The RCM employed here should be easy to use, automatically highlight any problems and offer the service technician valuable assistance at the same time. L3 L2 L1 N Energy, operating current, PQ Summation current measurement (RCM) of residual current Measurement of the central grounding point Page 6

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Message before blackout ma Personnel protection System protection Fire protection Disconnect Timely detection of any faults that arise is critical - i.e. even before fuses or residual current circuit breakers (RCD) disconnect affected systems or power socket circuits. For this purpose it is usually necessary to monitor, evaluate and report subtle increases in residual currents, e.g. triggered by insulation faults, and excessively high load currents, before tripping occurs! Residual current Message from RCM Information advantage t Time Sensors for energy management Our system is exceptionally well suited for acquiring energy data with minimal outlay. It allows for a large number of loads, and passes this information on to databases. Irrespective of the future legal regulations and existing options through which to reduce energy cost - energy optimisation and energy savings always offer the potential for high financial savings. ISO 50001 describes energy monitoring systems as a prerequisite for energy management systems. The following applies here: The greater the scope of information, the more definitely the savings potentials can be determined. Archiving energy data in databases The data stored in the measurement devices, actual measured values and events which exceed preset threshold values, is read out via the GridVis software and stored in central databases for further evaluation. Depending on the size of the consumer systems it should be able to determine automatically a high number of operating current values and archive these - the system should however remain clear and simple to the operator. Fig.: Message before shut-down - an objective of residual current monitoring Fig.: UMG 20CM 20-channel residual current and energy measurement device, mixed operating mode possible Our solution: Energy data acquisition, RCM and PQ With our energy data acquisition and residual current monitoring system it is possible to avoid failures in the power supply through early warnings. Furthermore, system protection and fire protection can be enhanced. Measured values and messages can be transferred to databases. In doing so, the operating current acquisition offers the evaluation basis for energy management systems. The multi-channel monitoring devices, with connectable current transformers, are fitted into distribution systems on standardised top-hat DIN rails. They are used in TN and TT systems, and also in IT systems for operating current measurement. Use of the current transformers, e. g.: incoming supplies, in outputs circuits (loads) with PEN and N conductors (for stray currents in TN-S systems), at central ground points (CGP). The monitoring devices can be parameterised with ease, the actual measured values can be visualised as a graphical progression. Various options exist for the issuance of alarms and messages in the event of a failure - including to remote monitoring and messaging via email. Fig.: Summation current transformers for the acquisition of residual currents. Various configurations and sizes enable use in almost all applications. Page 7

Benefits The intelligent system solution Early warning of potential system failures Avoidance of costly and hazardous system downtimes, the availability of systems is increased Localisation of individual faulty outlets, reduced work when troubleshooting Early detection of an overloading of the N conductor and critical residual currents, resulting in increased fire safety By setting parameters for the system when in new condition and subsequent constant monitoring, all changes to the system state after final commissioning are discernible Fulfilment of the safety criteria "RCM residual current monitoring" in data centres Convenient monitoring and parameterisation solution with GridVis software Operating current acquisition of all relevant loads as a basis for an energy management system (EnMS) Application areas Data centres / offices Petrochemical plants Traffic systems Media technology facilities Industrial systems / conveyance technology Railway and road tunnels Energy-intensive industries with optimisation potentials Main distribution The 20 channels of the UMG 20CM can optionally be used together with the respective current measurement transformer for residual current or operating current monitoring. N Feed-in L1 L2 L3 N In the case of residual current monitoring, the residual currents flowing to ground or any other path are acquired. PAS PE CGP Ethernet (TCP/IP) UMG 96RM-E Residual current Operating current Page 8

UMG 20CM & UMG 96RM-E RCM & energy data acquisition The principle Using the analysis and evaluation GridVis software it is possible to present channel-specific measured values of the current monitoring devices. Warning and failure messages can be displayed e. g. in the topology view. Associated message texts are freely configurable with GridVis. Furthermore, with GridVis it is possible to parameterise the residual and operating current monitoring devices. To do so it is merely necessary to connect and pre-parameterise the UMG 20CM via Modbus. Database connection Energy management system (EnMS) Monitoring system Within the framework of logging all relevant operating currents and transferring the values to databases managed by the customer, the system is optimally suited for an energy management system (EnMS). The most convenient solution for the monitoring, documentation and parameterisation is the GridVis monitoring system. The data stored in the measurement devices (e. g. location information, monitored operating equipment), as well as their measured values and events which exceed preset threshold values, is automatically read out and stored in the project database. Measured values of the respective channels are visualised as a graphical progression. Operating and error messages can be automatically sent to any desired recipients by email. Remote monitoring of the entire system is possible via internet, similarly the connection of popular databases. Comprehensive RCM, operating current monitoring and energy measurement Feed-in L1 L2 L3 N Modbus RTU Ethernet (TCP/IP) Modbus RTU UMG 20CM UMG 20CM UMG 96RM-E UMG 20CM f1 f2 e. g. computer PE Residual currents type A per IEC 60755 Page 9

UMG 20CM energy and residual current measuring device with 20 current channels The operating and residual current measurement device (RCM Residual Current Monitor) UMG 20CM with connectable current transformers is used for acquiring operating current or alternatively for RCM measurement. It is therefore specifically applicable to areas with numerous outlets, for example in PDUs for data centres. 3Ph/N/PE AC 50 Hz 230/400 V L1 L2 L3 N PE Imax 1000mA L1 L2 L3 Imax 1000mA 20 current channels (inputs) are available for the connection of current transformers for the acquisition of the operating current and for residual current measurement from 10 ma to 1000 ma (CT-20, CT-6-20 or SC-CT-20). Ch1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Ch20 RS485 (Modbus RTU) is implemented as a communication interface. The limit value programming and alarm message options can inform you immediately in the event of an overloading of your energy distribution system. Ethernet 24 V UC _ ~ Supply voltage 70276 V 50/60 Hz AC / DC Modbus Further devices Fig.: Typical connection diagram UMG 20CM with master-slave configuration Main features 20 current measurement channels +/-0.5% 3 voltage measurement channels +/-0.5% Internal RS485 interface (Modbus as slave) 20 LEDs one LED for each current channel (green = o.k.; red = rated current exceeded) Measuring range: Operating current up to 63 A Residual current 10 ma 1000 ma Standard measured values: V, A, kw, kva, kvar, kwh Counter statuses resettable Totalling channels for three-phase (max. 7) Power factor per channel Crest factor / total harmonic distortion Harmonics up to the 63rd (analysis channel) Minimum and maximum values for currents with time stamp Limit value for each current channel / limit value bit Designations for each measurement channel (64 characters) Page 10

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Significant product features Unique technical feature: RCM and energy measurement device in a single unit Compact nature of the system Can be retrofitted to existing systems Modbus RTU directly on board State indication per channel (LEDs) Name stored per channel in the measurement device Wide range power adapter (90 276 V AC) Integration in ISO 50001 GridVis software Diverse CT variants for the individual application Measuring variants: - Three-phase and single-phase energy measurement - RCM measurement three-phase and single-phase High sample rate 20 000 Hz CT connection control (i.e. wire break is detected) Harmonics analysis up to 63rd harmonic Saving of minimum and maximum values with time stamp Standard measured values: V, A, kw, kva, kvar, kwh (variable list) Scalability of the system Typical application cases Case study A Measurement of 60 single-phase current paths, e. g. server racks, apartments or offices Ethernet UMG 508 Measurement of the main feed-in with event analysis 3 Main distribution Modbus UMG 96RM-E Operating & RCM measurement of the supply line to the sub-distribution 60 current 1-20 21-40 41-60 Sub distribution UMG 20CM 20 x 1-phase 20 x 1-phase 20 x 1-phase Customer benefits Extremely compact solution for complete monitoring via three levels with leading-edge master-slave communication architecture. Page 11

Case study B Case study C 10 single-phase operating current 10 single-phase residual current 5 three-phase operating current 5 single-phase residual current 1-10 11 20 1-phase Residual current 1-15 16 20 3-phase Residual current Customer benefits Flexible combination of operating current measurement and RCM measurement in a single measurement device. Customer benefits Flexible combination of 1-phase and 3-phase in a single measurement device. Case study D Case study E 20 single-phase operating current or RCM 3 single-phase operating current 1 three-phase operating current 6 single-phase residual current 8 single-phase PE 1 20 1-phase Customer benefits Very compact measurement device with 20 current measurement inputs in a single device, flexible in combination. 1 3 1-phase 4 6 3-phase 7 12 Residual current 13 20 PE Customer benefits Flexible combination of 1-phase and 3-phase as well as operating current and RCM measurement in a single measurement device. Page 12

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Technical data UMG 20CM Technical data Item no. 14.01.625 Type of measurement Constant true RMS up to the 63rd harmonic Operating voltage 90 276 V AC and DC Measurement in quadrants 4 Networks TN, TT, IT Measurement in single-phase/multi-phase networks 1 ph, 2 ph, 3 ph and up to 20 times 1 ph Measured voltage input Overvoltage category 300 V CAT III Measured range, voltage L-N, AC (without transformer) 10 300 Vrms Measured range, voltage L-L, AC (without transformer) 18 480 Vrms Resolution 0.1 V Impedance 1.3 MOhm / phase Frequency measuring range 45 65 Hz Sampling frequency 20 khz / phase Measured current input Evaluation range of the operating current 0 63 A Evaluation range of the residual current 10 1000 ma Resolution 1 ma Digital inputs and outputs Number of digital outputs 2 Switching voltage max. 60 V DC, 30 V AC Maximum current 350 ma Switch-on resistance 2 Ohm Maximum line length up to 30 m unshielded, from 30 m shielded Mechanical properties Weight 270 g Device dimensions in mm (H x W x D) 90 x 105 x approx. 73 Protection class per EN 60529 IP20 Assembly per IEC EN 60999-1 / DIN EN 50022 35-mm DIN top-hat rail Environmental conditions Temperature range Operation: K55 (-10 C +55 C) Relative humidity Operation: 5 to 95 % (at 25 C) Operating altitude 0 2000 m above sea level Degree of pollution 3 Mounting position any Electromagnetic compatibility Electromagnetic compatibility of operating equipment Directive 2004/108/EC Electrical appliances for application within particular voltage limits Directive 2006/95/EC Equipment safety Safety requirements for electrical equipment for measurement, regulation, control and laboratory use IEC/EN 61010-1 Part 1: General requirements Part 2-030: Particular requirements for test and measurement current circuits IEC/EN 61010-2-030 Immunity from interference Class A: Industrial area IEC/EN 61326-1 Electrostatic discharge IEC/EN 61000-4-2 Voltage drops IEC/EN 61000-4-11 Emissions Class B: Residential area IEC/EN 61326-1 RFI Field Strength 30 1000 MHz IEC/CISPR11/EN 55011 Radiated interference voltage 0.15 30 MHz IEC/CISPR11/EN 55011 Safety Europe CE labelling Comment: For detailed technical information please refer to the operating instructions and the Modbus address list. Recommendation: The bus should not contain more than 10 devices, type UMG 20 CM if several UMG 20 CM measuring channels are used. If the app 20CM-Webmonitor is used, the number is limited to 5 devices due to the app management. Page 13

UMG 96RM-E with 6 current channels for permanent operating and residual current monitoring RCM UMG 96RM-E measurement devices have 6 current inputs (4 inputs at 1 and 5 A and 2 analogue inputs 030 ma), of which 2 analogue inputs can be used for temperature, analogue or residual current measurement. This means that in addition to normal measurement of operating currents, continuous monitoring of the leakage current is possible. For the RCM measurement, a special threshold setting has been implemented in which RCM limit values are dynamically set, depending on the total power output. With the dynamic limit value generation, a custom residual current value is created in all load ranges and unnecessary fault alarms are avoided. In contrast to conventional RCM monitoring devices, an optimum residual current limit value is also assured in the small load range. Outgoing residual currents and ground leakage are captured and saved according to IEC 60755 type A and B, e.g. on incoming feeder, loads or central ground points. Group 1 Group 2 Digital inputs/outputs Analog inputs Supply voltage Voltage measurement Current measurement Consumer Example connection (with residual current measurement IPE/IDIFF) Permanent operating and safety Leakage/fault current monitoring Monitoring of operating currents Monitoring of central ground points Facilitation of BGV-A3 test for fixed systems Avoidance of faults and hence increase in system reliability Reduction in EMC interference Page 14

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Technical data UMG 96RM-E Technical data Item number: 52.22.036 Type of measurement Constant true RMS up to the 40th harmonic Operating voltage 20-250 V (45..65 Hz) or DC 20 V - 300 V Memory 256 MB Measurement in quadrants 4 Networks TN, TT, IT Measured voltage input Overvoltage category 300 V CAT III Measured range, voltage L-N, AC (without transformer) 10 300 Vrms Measured range, voltage L-L, AC (without transformer) 18 520 Vrms Resolution 0.01 V Impedance 4 MOhm / phase Frequency measuring range 45 65 Hz Power consumption approx. 0.1 VA Sampling frequency per channel (50 / 60 Hz) 21.33 / 25.6 khz Measured current input Rated current 5 A Resolution 0.1 ma Measurement range 0.001 6 Amps Overvoltage category 300 V CAT II Power consumption approx. 0.2 VA (Ri = 5 mohm) Overload for 1 sec. 120 A (sinusoidal) Sampling frequency per channel (50 / 60 Hz) 21.33 / 25.6 khz Residual current input Analogue inputs 2 (for residual current or temperature measurement) Resolution residual current input*: 0.05 30 ma Digital outputs Switching voltage max. 60 V DC, 33 V AC Switching current max. 50 maeff AC / DC Response time 210 ms Pulse output (energy pulse) max. 50 Hz Maximum line length up to 30 m unscreened, from 30 m screened Mechanical properties Weight approx. 370 g Device dimensions in mm (H x W x D) 96 x 96 x 78 Battery CR2032, 3 V, type Lithium Protection class per EN 60529 Front: IP40; Back: IP20 Assembly per IEC EN 60999-1 / DIN EN 50022 Front panel installation Cable cross section Supply voltage 0.2 to 2.5 mm² Current measurement 0.2 to 2.5 mm² Voltage measurement 0.08 to 4.0 mm² Environmental conditions Temperature range Operation: K55 (-25 +70 C) Relative humidity Operation: 0 to 90 % RH Operating altitude 0 2000 m above sea level Degree of pollution 2 Mounting position any Equipment safety Safety requirements for electrical equipment for measurement, regulation, control and laboratory use IEC/EN 61010-1 Part 1: General requirements Part 2-030: Particular requirements for Test and measurement current circuits IEC/EN 61010-2-030 * Example of residual current input 30 ma with 600/1 residual current transformer: 600 x 30 ma = 18,000 ma Comment: For detailed technical information please refer to the operating instructions and the Modbus address list. Page 15

Accessories: Residual current transformer It is possible to connect all conventional RCM transformers of type A with ma outlets. The RCM CT ratios are freely adjustable. Feethrough CT s are preferable for new installations, whereas split core CT s are recommended for retrofitting. The compact CT s of the KBU series enable rapid and economical installation by opening and closing of the CT. The simple button-operated locking system thus dispenses with the separating and detachment of primary cores. It is possible to use conventional 1/5-A current transformers for phases L14. Residual current transformers are required for the RCM function. Fig.: Split core current transformer SC-CT-20 Fig.: Current sensor CT-20 Technical Data Fig.: Feedthrough residual current transformer Divisible residual current transformer type A (Application: UMG 96 RM-E, UMG 20CM, UMG 512) Type Transformer ratio Max. primary residual current in ma* Dimensions in mm Item no. A B C / C1 D E KBU 23D 600/1 18000 93 106 34/58 20 30 15.03.400 KBU 58D 600/1 18000 125 152 34/58 50 80 15.03.401 KBU 812D 600/1 18000 155 198 34/58 80 120 15.03.402 * When using the analogue inputs of the UMG 96RM-E A C B Front view Base plate Feedthrough residual current transformer type A (Application: UMG 96 RM-E, UMG 512) Type Transformer ratio Max. primary residual current in ma* Rated Load Impedance Dimensions in mm (H x W x D) Item no. Ø A B C JZ30N 127/1 3800 10 Ω 30 73 90 30 15.03.450 JZ50N 127/1 3800 10 Ω 50 100 110 30 15.03.451 JZ65N 127/1 3800 10 Ω 60 125 110 30 15.03.452 JZ80N 127/1 3800 10 Ω 80 132 130 30 15.03.453 JZ100N 127/1 3800 10 Ω 100 152 180 47 15.03.454 JZ120N 127/1 3800 10 Ω 120 167 180 47 15.03.455 JZ150N 127/1 3800 10 Ω 150 217 257 70 15.03.456 JZ200N 127/1 3800 10 Ω 200 218 268 70 15.03.457 * When using the analogue inputs of the UMG 96RM-E Page 16

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Current sensor CT-20, operating and residual current transformer type A (Application: UMG 20CM) Type Max. operating current (A) Residual current (ma) Transformer ratio Class Max. diameter Primary conductor in mm Dimensions in mm (H x W x D) Item no. CT-20 63 (with burden) 10 1000 700/1 1 7.5 approx. 46 x 27 x 23 15.03.082 Accessories Snap fastening for top-hat rail EN 50022-35, suitable for type CT-20 approx. 14 x 41 x 27 09.09.010 Ready-made connection cable 1.5m with burden and spring type terminal adapter for operating current measurement 15.03.085 Split-core current transformer SC-CT-20 and SC-CT-21 (Application: UMG 20CM) Type Operating mode Max. operating current (A) Residual current (ma) Transformer ratio Max. diameter Primary conductor in mm Accuracy (%) Dimensions in mm (H x W x D) SC-CT-20 Operating current measurement* 63-3000/1 10 1 approx. 41 x 32 x 32 15.03.083 SC-CT-21 Residual current measurement - 10 1000 700/1 8 1 approx. 35 x 35 x 16 15.03.084 * Incl. ready-made connection cable; 1.5 m with burden and spring type terminal adapter for operating current measurement Item No. 6-fold DIN rail measurement strip CT-6-20, operating and residual current transformer type A (Application: UMG 20CM) Number of measuring channels 6 (measurement transformer integrated) Measuring accuracy 1% Evaluation Residual or operating currents (configurable as required via DIP switch) Thermal short time rated current 60 x In / 1 sec. Thermal continuous current 100% Rated isolation level 4 kv Transformer rated current 0 to 63 A (operating current with load), 10 to 1000 ma (residual current) Transformer ratio 700/1 Transformer rated frequency 50 / 60 Hz Insulation class E (120 C) Cable connection 7.5 mm plug-in connection (spring terminal) for maximum 4 x 6 mm 2 cable Dimensions in mm (H x W x D) 56 x 174 x 45 Internal diameter CT in mm 11 Assembly type DIN mounting Item no. 14.01.630 Accessories Ready-made connection cable 1.5 m twisted, shielded with connector 08.02.440 D C E Ød A B k l Split core operating current transformer up to 600 A (Application: UMG 20CM) Type Operating mode Max. operating current in A Transformation ratio Max. primary conductor diameter in mm Accuracy (%) Dimensions in mm (H x W x D) A B C D E Item no. SC-CT-20-100 Operating current measurement* 1 100 3000/1 16 1 55 41 29.5 31 19 15.03.093 SC-CT-20-200 Operating current measurement* 1 200 3000/1 24 1 74.5 52 45 34 22 15.03.094 SC-CT-20-300 Operating current measurement* 1 300 3000/1 24 1 74.5 52 45 34 22 15.03.095 SC-CT-20-400 Operating current measurement* 1 400 4000/1 36 0,5 91.4 57.0 57.1 40.2 21.1 15.03.097 SC-CT-20-500 Operating current measurement* 1 500 5000/1 36 0,5 91.4 57.0 57.1 40.2 21.1 15.03.099 SC-CT-20-600 Operating current measurement* 1 600 6000/1 36 0,5 91.4 57.0 57.1 40.2 21.1 15.03.101 Single accessory (burden is included the scope of the transformer delivery) Burden (2.2 Ω) for operating current transformer SC-CT-20-100 with 1.5 m ready-made connection cable and spring type terminal adapter 15.03.087 Burden (1.1 Ω) for operating current transformer SC-CT-20-200 with 1.5 m ready-made connection cable and spring type terminal adapter 15.03.088 Burden (0.8 Ω) for operating current transformer SC-CT-20-300/400/500/600 with 1.5 m ready-made connection cable and spring type terminal adapter 15.03.085 * 1 Incl. ready-made connection cable; 1.5 m with burden and spring type terminal adapter for operating current measurement Page 17

GridVis analysis software Our powerful, scalable software solution GridVis software serves as a user-friendly monitoring system, for analysing power quality and residual currents. Even with the basic version of GridVis (included with the device) it is possible to: 1. program and configure 2. read out, save, display, process, analyse and evaluate measurement data GridVis provides technicians and managers with the required data through which to identify energy saving potentials, reduce energy costs, calculate performance indicators and monitor status messages. GridVis: Endless possibilities Program limit values for RCM Comprehensive evaluations Display historic progressions Energy and PQ reports Convenient programming and parameterisation Delay times for RCM alarms Link measurement points Excel export (time-controlled) Web-based alarm manager Page 18

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Example application - data centre, bank head office Introduction Under the heading "assured power supply for data centres and other drop-out critical systems", residual and operating current monitoring is only one - albeit vital - component. We examine the completed project and portrayed example in the classic sense as a study object. If you discover that our system would be implementable in principle - even if a number of essential functions are not identifiable - please do not hesitate to contact us. Alignments and functional expansions are possible on a project-specific basis. The data centre project described here, implemented for a major German bank, constitutes the upgrade status in November 2012. Why monitor currents? The highest demands are placed on the availability of data centres. Their failure can endanger the financial success of every company. A basic prerequisite for the stable operation of the hardware is and remains an uninterrupted electricity supply - for the computers and components themselves, for air-conditioning systems, for security and fire safety equipment and even for lighting. A vital element of a secure power supply in this regard is the monitoring and evaluation of all currents. At the present time, a residual current and operating current monitoring system is the only expedient solution through which to technically implement the principle of "early reporting - before a trip-event".* Elements of an assured power supply Operating current measurement Residual current measurement (RCM) Power quality monitoring Redundant power supply system Uninterruptible power supply for short-term supply Measures to guard against electromagnetic interference (EMI) Emergency power system EPS EMC-compatible installation with monitoring of critical currents, power quality analysis Overvoltage protection Assured power supply for data centres * The German Federal Office for Information Security Technology states in this regard, in its high availability compendium HV 1.2 (Bonn 2009, 11 Infrastructure, Chap. 7.3.2, p. 31), that: "Residual current monitoring through the use of a Residual Current Monitor (RCM) is essential because this functions in a similar way to RCDs, although it offers the advantage of not reacting with an instant shutdown upon reaching the rated residual current. RCMs are able to observe the residual current over its temporal development and - depending on the individual settings - issue a warning message upon reaching a certain signalling residual current, which should be sent to a central station." Page 19

System requirements of the operator Configuration of a residual and operating current monitoring system for data centres at 4 locations in Germany Monitoring of the power supply for connected network cabinets (rack servers used with dual power supplies) Simple and also retrofittable possibility of operating current monitoring for outlets and loads Variable equipping (in terms of power and number) of network cabinets with rack servers must not lead to overloading or maximum loading of fused power boards (comply with thermal "uncritical" range of tripping curve) of circuit breakers Residual current monitoring in 1-phase and 3-phase final current circuits up to 1000 ma with the aim: "Report before a trip event" - detection of critical states and channel-related detection (per monitored current circuit) for rapid and targeted intervention Operating current monitoring up to 63 A Further requirements applicable to residual current monitoring: - High quality of the resolution, true RMS - Smallest / largest trigger threshold (trigger signal) from 10 ma to 1 A - Possibility of pre-warning - Power quality reports and cost centres Immediate message, if maximum loading of the usable sockets is attained (operating current monitoring) System dimensions, upgrade status November 2012 4 locations, with safeguarded critical consumers, one central overall energy management system, 7500 measurement points Channel-specific messages per email for service Site 1 Site 2 Site 3 Site 4 Connection possibility external databases TCP / IP Modbus Location-independent operation and observation of channel-dependent measured values and messages Connected loads in the data centre, e.g. network cabinets Page 20

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Parameterisation and display solution requirements Central and independent illustration of all actual values and messages Central parameterisation of all monitoring devices No manipulation possible on site at the monitoring devices - e.g. no unauthorised changing of the trigger thresholds Channel-related measured value displays and messages (alarm by email) Freely definable cost centres through to the individual circuit Simple to replace measurement devices and monitoring devices Rapid updating of many data points System can be expanded with ease Possibility of connecting with databases managed externally by the customer (as autonomous application for saving messages and values - included in a customer-specific data backup program) Complete overview of all connected web servers (in the systems) with just a single operating interface Monitoring of server cabinets (racks) Redundancy monitoring ma Personnel protection System protection Fire protection Disconnect Rack server with dual power supply Rack feed-in 1 Rack server with dual power supply Residual current Message from RCM Information advantage t Time Rack server with dual power supply Message in two stages creates time advantage Monitoring Operating currents Leakage currents, detected as residual currents Variable equipment of the racks with servers (in terms of power/number) possible without system overloading due to constant load control (operating current monitoring) Residual current monitoring with the aim of "Reporting before drop-out" Redundant power supply Redundant power supply Network 1, outlet 1, distribution cabinet 1 Network 2, outlet 2, distribution cabinet 2 Page 21

Advantages and benefits Through possibility of free allocation of the residual or operating current monitoring for an arbitrary number of measurement points, it is possible to assign the outputs as desired. The type of monitoring is only stipulated through the simple parameterisation of the UMG 20CM monitoring devices. Compact system with minimal space requirement Decentralised UMG master devices in the field make the system scalable, result: ease of possible expansion - capacity can be retrofitted at any location. Flexible expansion of the system through master-slave architecture Remote access through password-protected browser technology (internet standard browser). Ancillary effects Use of the operating current acquisition for determining load utilisation (electrical) of the system Support to the output-dependent alignment of the cooling capacity for the system, because the thermal output of the rack server is proportional to the operating current. Acquisition of the operating currents and transfer of the values to customer-specific database as a prerequisite Freely definable cost centres down to each individual circuit Verification of high electrical availability Page 22

UMG 20CM & UMG 96RM-E RCM & energy data acquisition Scalability: A considerable system advantage This means: The system can be expanded on an arbitrary basis - with increasing complexity the clarity and ease of operation remains intact with the same user interface. Principle of "distributed intelligence" The UMG master devices transfer the measured data from the monitoring devices (field devices) to the TCP/IP network. This is automatically saved and monitored by the GridVis energy management software. Switch TCP/IP Master device UMG 508 Modbus Modbus UMG 604 UMG 20CM slave devices Conclusion The monitoring system makes a fundamental contribution to increasing the permanent availability of the data centre. RCM monitoring systems are increasingly playing a role in the certification of IT infrastructures with respect to the evaluation criterion "assured energy supply" and as auxiliary aids for the assessment of electrical systems according to the applicable German standards and regulations. e.g. VDE 0105-100, VdS guidelines, BGV A3, BetrSichV. Furthermore, the acquisition of operating current constitutes the basis for an energy management system (EnMS). Page 23

Smart Energy & Power Quality Solutions Janitza electronics GmbH Vor dem Polstück 1 D-35633 Lahnau Germany Tel.: +49 6441 9642-0 Fax: +49 6441 9642-30 info@janitza.com www.janitza.com Sales partner Item no.: 33.03.657 Doc. no.: 2.500.075.3 Version 05/2016 Subject to technical alterations.