Excitation Systems THYRIPART. Compound-Excitation System for Synchronous Generators. Power Generation

Size: px
Start display at page:

Download "Excitation Systems THYRIPART. Compound-Excitation System for Synchronous Generators. Power Generation"

Transcription

1 Excitation Systems Compound-Excitation System for Synchronous Generators Power Generation

2 Operating Characteristics Load dependent Short circuit supporting Low voltage gradient dv/dt Black start capability Digital open and closed loop control High reliability and availability Extraordinary flexibility Easy maintenance Best control capabilities The excitation system is a static excitation system supplied by voltage and current from the generator and incorporating a transistorized voltage regulator. It supplies the energy required to excite the generator directly via slip rings. The outstanding flexibility of the standard system and the modular construction make the system suitable for application in industrial-, steam- and hydro power plants and particularly suitable for the modernization of existing excitation systems. -compartments (examples) Standard circuitry This basic circuit with its excellent dynamic properties also features a transistorized controller which provides a parallel circuit to the excitation winding. The transistorized controller is a DC chopper regulator, a standard product of DC drive technology. It operates in parallel with the rectifier, i.e. it is connected in parallel to the excitation winding. The transistorized chopper can both add and subtract current to the field current supplied by the basic circuit, thus increasing or reducing the field current. This control feature permits a relative voltage stability of ± 0.5%. In island mode it is even possible to operate the excitation system without closed loop control. The hardware components transformer, Harz circuit and bridge converter are capable to control the generator voltage to an accuracy of (depending on generator characteristics) approximately ± 10 %. The modular construction the graphically supported flexible software of the digital open and closed loop control as well as the little space requirement makes the system ideal for the modernization of existing excitation systems. For new systems adaptation to specific requests is possible. Mechanical Design The functional principle is based on a Harz circuit which uses an oscillating circuit to convert a voltage source into a current source. The no load component of the excitation is supplied from the excitation voltage transformer and converted into a current source by the Harz circuit The load component is supplied by the excitation current transformer. The generator current flows through the primary winding. The no load component from the Harz circuit flows through an additional winding and is added by this to the load component. A third winding supplies the resulting excitation current which is rectified in a bridge converter and fed to the generator field. The excitation system is installed in a standard cubicle specially designed for equipment comprising open loop and closed-loop controls and power electronics devices. Modular design and easy accessibility of all components facilitate all setting and optimizing operations. The standard cubicle group is 1500 to 2400 mm wide and 600 mm deep at a height of 2200 mm. The adaptability to all kinds of local conditions and existing plant may necessitate deviating cubicle dimensions, especially in the case of modernization projects. As the generator lead or neutral point has to go through the current transformer and the voltage transformer will be connected to the generator lead the transformers should be assembled close to the generator. Therefore the transformers are supplied bulky for erection into a separate room of MV compartment. The current-dependent component also helps to boost or maintain excitation in the event of voltage dips or short circuits. The oscillating circuit is supplied by the voltage generated from residual magnetism during run-up to speed or also at rated speed. This enables the generator to operate as a self-excited machine without an external power source. 2

3 Main components are: The voltage transformer (1) supplies the no load part of the excitation. The oscillating circuit consisting of the reactor (3) and the capacitor (4) transforms the no load part into a current source. The current transformer (2) supplies the load part of the excitation and adds it to the no load part. The B6U converter bridge (7) rectifies the excitation current. The components (1)-(7) alone control the generator voltage with an accuracy of max. ± 10 % The digital open and closed loop control (8) receives the actual values from the measurement transformers (5) and controls the transistor chopper (9). This chopper adds or subtracts a part of the excitation current. This results in an accuracy of ± 0,5 % for the generator voltage. In manual mode, the actual value excitation current is detected via a shunt resistor (10) and controlled by the closed loop control. The over voltage protection (11) prevents from over voltages in the field circuit. It is self restoring so that excitation can go on after over voltages caused by load steps or short circuits. To de-excite the generator, the de-excitation contactor (6) shorts the feeding current source. Additionally the shorted current source prevents the generator from self-excitation out of the residual magnetism if the generator is at speed or being turned. Optionally it is possible to speed the de-excitation up by the fast de-excitation circuit (12) consisting of the de-excitation switch and the de-excitation resistor Standard Circuit 3

4 Mode of Operation Base Excitation The excitation current supplied by the consists of the voltage-dependent no-load component and the current-dependent load component. The no-load component is generated from an oscillating circuit according to the Harz circuit principle. The oscillating circuit consisting of reactor L and capacitor C is connected to the generator lead and the voltage transformer respectively. At a frequency near resonance, the oscillating circuit produces a current at the leads between the reactor and the capacitor. This current is proportional to the voltage applied (Harz principle). By adjusting the reactor inductance (by varying the air gap) or changing the tap on the current transformer this current can be set to correspond to the no-load field current when the generator is at nominal voltage. Based on the Harz principle this current is independent of ambient conditions as e.g. the rotor temperature. At rated speed the rated voltage is reached automatically. As this current flows through the reactor its phase is offset by 90 el from that of the current. During load operation a current component decoupled directly from the generator current is added to this no-load component. Decoupling and addition are performed in the current transformer (T). The generator current flows through the primary winding of the CT, which only has a few turns, and the current from the oscillating circuit flows through the first secondary winding. The sum of the two currents (adapted according to the phase angle and the transformation ratio) is picked off the second secondary winding, rectified, and fed to the field winding. This base excitation controls the generator current to an accuracy of min. ±10 %. Voltage built up The oscillating circuit operates near resonance frequency. The result is a voltage rise which supplies a little excitation current even if the supply voltage generated from residual magnetism is low. By this the generator voltage rises and therefore also the excitation current. This results in a voltage built up to rated generator voltage. U(G) (400 V) I(G) -L -C Principle diagram of the basic excitation Current- and Voltage transformer (example) -T I f Comanche Peak nuclear power plant, USA: systems qualified to American standard 1E 4

5 Closed loop control The closed loop control controls a transistor chopper, which adapts the excitation current from the Harz circuit by current addition or subtraction. This results in a control accuracy of ± 0,5 % for the generator voltage. Automatic Voltage Regulator (Automatic control system) The actual value of the generator voltage is compared with an adjustable generator voltage setpoint. The resulting signal is compared with the output of the excitation limiter and taken to the input of the PI voltage controller. The PI voltage controller with adjustable gain and time response provides an output signal which is applied to the setpoint input I ref of the secondary field current controller. The output of this controller governs the generation of the frequency-modulated driving pulses for the power transistors of the associated output stage, which is operated with a clock frequency of about 2,5 khz. The DC current flows through the phase U and W of the transistor power circuit. Automatic cos ϕ or reactive power regulator at the generator leads (Automatic control system) The cos ϕ regulator compares the actual value with an adjustable cos ϕ reference value. In case of a deviation the reference value of the voltage regulator is adjusted until the deviation is reduced to zero. In isolated or no-load operation of the generator the operation mode of the automatic control system is switched over from cos ϕ regulation to voltage regulation. Options V/Hz-limiter (over fluxing limiter) Cos - ϕ - or reactive power regulator at the supply point VAR joint control of several generators Commissioning mode The manual control system is designed as excitation current regulator which permits generator characteristics to be recorded during commissioning and inspections, and also short-circuit operation of the generator to be carried out for setting the protective relays. When the automatic voltage regulator is faulted, it can also be used for the operational adjustment of the generator excitation. Follow-up control The setpoint value of the field current controller is continuously updated during operation on the automatic control system, thus ensuring rapid and nearly bump less changeover to manual control in the event of a fault. Automatic switchover takes place when certain fuses or protective circuit breakers operate or in case of failure of the automatic control system. Control accuracy The control accuracy of all control systems is ± 0.5 % Manual control system (Excitation current regulator) The P-action control amplifier of this regulator receives a filtered setpoint signal that is compared with the actual value of the field current. The output signal controls the frequency-modulation drive circuit for the power transistors of the associated output stage. Of the three control systems the automatic one is normally in operation, even during starting and stopping of the electric set. The automatic control system includes the measuring and setpoint devices and the control and monitoring circuits for the following functions: Generator voltage regulation Fast secondary control and limitation of the output current of the field current chopper regulator and/or field-forcing limiter. Limiting controller for the under-excited range (under excitation limitation) Delayed high limiting control for the over-excited range (over excitation limitation) Delayed generator current limiter (stator current limitation) Control board inside the transistor power part 4

6 Limiting controllers When operating a synchronous generator, it is necessary to observe the permissible combinations of active and reactive power, which can be seen from the capability diagram. LMO Limit characteristic of the underexcited range OP Limit set by the stator temperature rise PQ Limit set by the rotor temperature rise Similar characteristics with reversed active-power flow apply to motor operation of the generator. The underexcitation limiter corrects the reactive power by raising the machine voltage as necessary to ensure that, in case of an excursion beyond the limit characteristic L-M-O, the operating point is returned to that characteristic before the machine is tripped by the underexcitation protection. The stator current limiter ensures the delayed limitation onto working points, within the N-P range of the generator power diagram. The main task of the stator current limiter is to prevent the generator stator from thermal overload, which can be caused by a high reactive power at increased active power. The stator current limiter also permits increased excitation values for a limited period so that the generator can back up the system. N O Active Power Max. turbineoutput Active Power N O P Max. turbineoutput Underexcited M M Underexcited Overexcited Q L Reactive Power Limit characteristics of a synchronous machine in generator operation The overexcitation limiter ensures that, in the overexcited range, the operating point always keeps within capability curve section P-Q of the generator. In response to system voltage drops caused by high reactive power requirements, switching manipulations or faults, the voltage regulator raises the excitation level so as to keep the generator voltage constant. The overexcitation limiting device acts as a safeguard against thermal overloading of the rotor. The overexcitation limiter admits excitation current values between the maximum continuous current and the maximum excitation current (field forcing) for a limited period of time so that the generator can back up the system in response to short-time system voltage dips. The secondary excitation current limiter (field-forcing limiter), in contrast, has the task of limiting the excitation current to the maximum permissible value as quickly as possible. L Minimum excitation limiting t(s) Overexcitation limitation Reactive Power 10 Subordinate excitation current limitation Excitation current I f (Rated Value) Overexcitation limiting and secondary field current limiting 5

7 Open loop control The open loop control system contains interlocks for switching the excitatioin on and off. The protective OFF signal on the other hand is applied directly to the coil of the excitation contactor. The open loop control also affects the changeover between the automatic and manual closed loop control systems. Every operating mode of the excitation system is monitored and displayed; slow control processes are carried out and evaluated. Power circuit The power circuit uses transistor chopper regulators, which provides the necessary excitation power via a DC link. The field voltage is adjusted by varying the pulse/pause ratio and the field circuit resistance causes the field circuit to vary accordingly. The field current is measured in the output stage and the signal is converted for the field current controller. Control In addition to detailed internal fault indication, the internal monitoring routine makes the following alarms available at the cabinet terminals: Fault with Protective Off command Fault in automatic control system and switchover to manual control system Group alarm triggered by various internal fault signals. Group alarm triggered by various internal fault signals causing starting lockout. L1 L2 L3 Rectifier Smoothing Adjuster P N Process alarms are also made available for external indication: Excitation is on Excitation is off Automatic Voltage Regulator is on Excitation Current Regulator is on Cos ϕ or VAR Regulator is on Limiters are active Further more detailed signals are optionally possible. Principle connection of the transistor power part Output The four quadrant chopper allows positive as well as negative outpot voltages with positive or negative output currents. If the mean value of the output voltage is bigger than the excitation voltage of the base excitation, an additional current is fed into the field circuit and the excitation current rises. If the mean value of the voltage is lower, a part of the base excitation current is fed back into the DC link. The result is a lower excitation current V V positive zero negative Principle of the pulse wide modulation 6

8 PC Tools The operator friendly software tool SIMOVIS/DriveMonitor guarantees simply commissioning of the. Through a serial interface the voltage regulator can be connected with the PC for easy configuration. Customer friendly Configuring The SIMOVIS/DirveMonitor software for Microsoft Windows 9x/2x/NT allows the complete parameterization of the power circuit. Actual values can be monitored in the parameter list and parameters can be changed easily by selecting the corresponding parameter in the parameter list. It is possible to choose between a complete parameter list, pre-defined parameter lists with selection of parameter for a special application (e.g. input/ output) or a user defined parameter list by entering the interesting parameter numbers. A complete upread of parameters allows easy documentation. 7

9 Trace Trace is an add-on for SIMOVIS/Drive Monitor that permits visualization of recorded data. You can also store the data read out of the device and open it again later. It is also possible to import such data into text processing programs, such as Microsoft Word, or into spreadsheet programs, such as Microsoft Excel. You can perform simple measurements of amplitudes and instants using two moveable cursors. The trace recording function contains following features: Monitoring of up to 8 analog signals Monitoring of 16 binary signals per unused analog signal (e.g. 32 binary and 6 analog signals) Maximum recording time of 280s at a maximum sampling rate of 280ms or 1.4s at minimum sampling rate of 1.4ms Freely adjustable sampling rate between 1.4 and 280ms in steps of 1.4ms Fault recording is automatically triggered by programmable fault signals (triggered by binary signals e.g. faults or by comparing an analog value (condition: </>/=/<>) with a predefined value) Adjustable pre-trigger between 0% (no pre-trigger, only future) and 100% (only past, no future) 8

10 Configuring with D7-ES The complex voltage regulator with its limiters and calculations as well as control functions such as interlocking is integrated inside the programmable T400 circuit board. The T400 can be configured with the graphic D7-ES configuring tools, based on Windows 95/NT. Thus, it is very easy to implement even complex customized supplementary functions inside the. Complete standard software packages are available for functions and applications which are frequently required. The picture below shows an example of a software structure and a selection of available functions out of the function block library. 9

11 Technical Data The range of application for excitation systems are low and middle voltage generators with small and medium power when load dependence and short circuit support is required or the condition of the rotor insulation does not allow the high voltage gradient caused by thyristor converters. This mainly applies for older generators. Other reasons are the black start capability and the high availability. The standard application range is (extended application range on demand): Rated generator voltage U(GN) max. 13,2 kv Rated generator current I(GN) max A Rated excitation current I(fN) max. 960 A Auxiliary supply from station battery 250 V: For power circuit control Power consumption: < 0,1 kw continuously < 0,2 kw short-time For signal and controller power supply (24V DC) Power consumption: < 0,2 kw continuously Instrument transformers: Potential transformers: connected to 3 phases of the generator voltage. Power consumption < 5 VA per phase; Secondary voltage rating 100 V to 120 V. Current transformers: Two-phase (L1, L3), for measuring the generator current. Secondary current rating 5 A or 1 A, < 5 VA (plus CT cable losses). The transformers are not included in the scopeof supply of the voltage regulator. Standards: The excitation system is rated and designed according to IEC-, EN-, DIN-, VDE-, IEEE-421- standards. Service and maintenance of the excitation system can be executed according the VGB4- instructions. Atucha nuclear power plant, Argentinia: four systems 7.2 MVA for emergency generators of Atucha 2. 10

12 Excitation Systems Published by and copyright 2004: Siemens AG Power Generation Freyeslebenstrasse Erlangen, Germany fax: Subject to change without prior notice The information in this document contains general descriptions of the technical options available which do not always have to be present in individual cases. The required features should therefore be specified in each individual case at the time of closing the contract.

Excitation Systems RG3 - T4. Transistorized Excitation Systems for Synchronous Generators. Power Generation

Excitation Systems RG3 - T4. Transistorized Excitation Systems for Synchronous Generators. Power Generation Excitation Systems RG3 - T4 Transistorized Excitation Systems for Synchronous Generators Power Generation Operating Characteristics Reliability High availability Digital control facilities Very good control

More information

Excitation Systems. Service Generators SIPOL. Transistorized Excitation Systems for Synchronous Generators. Power Generation

Excitation Systems. Service Generators SIPOL. Transistorized Excitation Systems for Synchronous Generators. Power Generation Excitation Systems Service Generators Transistorized Excitation Systems for Synchronous Generators Power Generation Operating Characteristics High availability Reliability Digital control facilities Very

More information

SPPA-E3000 Brushless Excitation System (BES, Type RG3)

SPPA-E3000 Brushless Excitation System (BES, Type RG3) / Technical Description / Juni 2014 SPPA-E3000 Brushless Excitation System (BES, Type RG3) Maximum-availability excitation system for synchronous generators with brushless exciters Answers for energy.

More information

Instrumentation, Controls & Electrical / Technical Description / February 2016

Instrumentation, Controls & Electrical / Technical Description / February 2016 / Technical Description / February 2016 SPPA-E3000 Static Excitation Systems (SES) Static excitation systems for excitation and voltage regulation of synchronous machines Answers for energy. Table of contents

More information

P. O. BOX 269 HIGHLAND, ILLINOIS, U.S.A PHONE FAX

P. O. BOX 269 HIGHLAND, ILLINOIS, U.S.A PHONE FAX SSE-N NEGATIVE FIELD FORCING SHUNT STATIC EXCITER/REGULATOR SYSTEM Control Chassis 6 SCR Power Chassis APPLICATION The SSE-N Negative Field Forcing Exciter/Regulator is used for both new and old installations

More information

EXCITATION SYSTEM MODELS OF GENERATORS OF BALTI AND EESTI POWER PLANTS

EXCITATION SYSTEM MODELS OF GENERATORS OF BALTI AND EESTI POWER PLANTS Oil Shale, 2007, Vol. 24, No. 2 Special ISSN 0208-189X pp. 285 295 2007 Estonian Academy Publishers EXCITATION SYSTEM MODELS OF GENERATORS OF BALTI AND EESTI POWER PLANTS R. ATTIKAS *, H.TAMMOJA Department

More information

COPYRIGHTED MATERIAL. Index

COPYRIGHTED MATERIAL. Index Index Note: Bold italic type refers to entries in the Table of Contents, refers to a Standard Title and Reference number and # refers to a specific standard within the buff book 91, 40, 48* 100, 8, 22*,

More information

ELECTRONIC CONTROL OF A.C. MOTORS

ELECTRONIC CONTROL OF A.C. MOTORS CONTENTS C H A P T E R46 Learning Objectives es Classes of Electronic AC Drives Variable Frequency Speed Control of a SCIM Variable Voltage Speed Control of a SCIM Chopper Speed Control of a WRIM Electronic

More information

New Redundant Automatic Voltage Regulator (AVR) Solution

New Redundant Automatic Voltage Regulator (AVR) Solution White Paper New Redundant Automatic Voltage Regulator (AVR) Solution Author: David R. Brown, Turbomachinery Control Solutions Senior Consultant, Invensys Operations Management What s Inside: 1. Introduction

More information

ECE 422/522 Power System Operations & Planning/Power Systems Analysis II 5 - Reactive Power and Voltage Control

ECE 422/522 Power System Operations & Planning/Power Systems Analysis II 5 - Reactive Power and Voltage Control ECE 422/522 Power System Operations & Planning/Power Systems Analysis II 5 - Reactive Power and Voltage Control Spring 2014 Instructor: Kai Sun 1 References Saadat s Chapters 12.6 ~12.7 Kundur s Sections

More information

SRA 2250/6 RESISTOR ARS-01 RESISTOR AUTOMATICS

SRA 2250/6 RESISTOR ARS-01 RESISTOR AUTOMATICS ELECTRICAL ENGINEERING DIVISION Distribution Network Department SRA 2250/6 RESISTOR ARS-01 RESISTOR AUTOMATICS ELA T150.2 en SRA 2250/6 Resistor specification The SRA 2250/6 Resistor is intended to increase

More information

Thyricon Excitation System

Thyricon Excitation System Thyricon Excitation System 1 1 2 3 2 Excitation System The Thyricon Excitation Family represents the extensive experience and knowledge of Voith Hydro as one of the major hydropower generator manufacturers.

More information

Arbitrary power supplies. 160 W to 5200 W

Arbitrary power supplies. 160 W to 5200 W Arbitrary power supplies 160 W to 5200 W TOE 8815 Arbitrary power supplies for generation of any voltage and current characteristics with an output power from 160 W to 5200 W. With exceptionally versatile

More information

EH2741 Communication and Control in Electric Power Systems Lecture 2

EH2741 Communication and Control in Electric Power Systems Lecture 2 KTH ROYAL INSTITUTE OF TECHNOLOGY EH2741 Communication and Control in Electric Power Systems Lecture 2 Lars Nordström larsno@kth.se Course map Outline Transmission Grids vs Distribution grids Primary Equipment

More information

GENERATOR INTERCONNECTION APPLICATION Category 5 For All Projects with Aggregate Generator Output of More Than 2 MW

GENERATOR INTERCONNECTION APPLICATION Category 5 For All Projects with Aggregate Generator Output of More Than 2 MW GENERATOR INTERCONNECTION APPLICATION Category 5 For All Projects with Aggregate Generator Output of More Than 2 MW ELECTRIC UTILITY CONTACT INFORMATION Consumers Energy Interconnection Coordinator 1945

More information

Fixed Series Compensation

Fixed Series Compensation Fixed Series Compensation High-reliable turnkey services for fixed series compensation NR Electric Corporation The Fixed Series Compensation (FSC) solution is composed of NR's PCS-9570 FSC control and

More information

Development of an Experimental Rig for Doubly-Fed Induction Generator based Wind Turbine

Development of an Experimental Rig for Doubly-Fed Induction Generator based Wind Turbine Development of an Experimental Rig for Doubly-Fed Induction Generator based Wind Turbine T. Neumann, C. Feltes, I. Erlich University Duisburg-Essen Institute of Electrical Power Systems Bismarckstr. 81,

More information

T/3000 T/3000. Substation Maintenance and Commissioning Test Equipment

T/3000 T/3000. Substation Maintenance and Commissioning Test Equipment T/3000 Substation Maintenance and Commissioning Test Equipment MULTI FUNCTION SYSTEM FOR TESTING SUBSTATION EQUIPMENT SUCH AS: CURRENT, VOLTAGE AND POWER TRANSFORMERS, ALL TYPE OF PROTECTION RELAYS, ENERGY

More information

CHIEF ENGINEER REG III/2 MARINE ELECTROTECHNOLOGY

CHIEF ENGINEER REG III/2 MARINE ELECTROTECHNOLOGY CHIEF ENGINEER REG III/2 MARINE ELECTROTECHNOLOGY LIST OF TOPICS 1 Electric Circuit Principles 2 Electronic Circuit Principles 3 Generation 4 Distribution 5 Utilisation The expected learning outcome is

More information

Numbering System for Protective Devices, Control and Indication Devices for Power Systems

Numbering System for Protective Devices, Control and Indication Devices for Power Systems Appendix C Numbering System for Protective Devices, Control and Indication Devices for Power Systems C.1 APPLICATION OF PROTECTIVE RELAYS, CONTROL AND ALARM DEVICES FOR POWER SYSTEM CIRCUITS The requirements

More information

PRODUCT TEST MANUAL 2SY110K28 SYNCHRONISM CHECK RELAY

PRODUCT TEST MANUAL 2SY110K28 SYNCHRONISM CHECK RELAY Sheet 1 of 7 Order Number Serial Number PRODUCT TEST MANUAL 2SY110K28 SYNCHRONISM CHECK RELAY Issue Date Level D 12/12/1996 Initial issue. Summary of changes Due to RMS continuous product improvement policy

More information

N. TEST TEST DESCRIPTION

N. TEST TEST DESCRIPTION Multi function system for testing substation equipment such as: current, voltage and power transformers, all type of protection relays, energy meters and transducers Primary injection testing capabilities

More information

QUINT-PS-24DC/24DC/10

QUINT-PS-24DC/24DC/10 QUINT-PS-24/24/10 QUINT - converter, primary switched mode, input: 24 V, output: 24 V /10 A INTERFACE Data Sheet PHOENIX CONTACT - 02/2006 Description The QUINT - converter 24 V/10 A converts the voltage

More information

SRI VIDYA COLLEGE OF ENGG AND TECH

SRI VIDYA COLLEGE OF ENGG AND TECH EEE6603 PSOC Page 1 UNIT-III REACTIVE POWER VOLTAGE CONTROL 1. List the various components of AVR loop? The components of automatic voltage regulator loop are exciter, comparator, amplifier, rectifier

More information

Conventional Paper-II-2013

Conventional Paper-II-2013 1. All parts carry equal marks Conventional Paper-II-013 (a) (d) A 0V DC shunt motor takes 0A at full load running at 500 rpm. The armature resistance is 0.4Ω and shunt field resistance of 176Ω. The machine

More information

N. TEST TEST DESCRIPTION

N. TEST TEST DESCRIPTION Multi function system for testing substation equipment such as: current, voltage and power transformers, over-current protection relays, energy meters and transducers Primary injection testing capabilities

More information

Exercise 3. Doubly-Fed Induction Generators EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. Doubly-fed induction generator operation

Exercise 3. Doubly-Fed Induction Generators EXERCISE OBJECTIVE DISCUSSION OUTLINE DISCUSSION. Doubly-fed induction generator operation Exercise 3 Doubly-Fed Induction Generators EXERCISE OBJECTIVE hen you have completed this exercise, you will be familiar with the operation of three-phase wound-rotor induction machines used as doubly-fed

More information

Power systems Protection course

Power systems Protection course Al-Balqa Applied University Power systems Protection course Department of Electrical Energy Engineering 1 Part 5 Relays 2 3 Relay Is a device which receive a signal from the power system thought CT and

More information

AC CURRENT GENERATOR POC-6000 (current from 0 to 1000 ARMS)

AC CURRENT GENERATOR POC-6000 (current from 0 to 1000 ARMS) AC CURRENT GENERATOR PERFORMANCES Wide range of current 50 db dynamic range Signal-to-noise ratio: 80 db open loop protection Stability < 0,1% Very low THD distortion < 0,3% External synchronization Build-up

More information

Conventional Paper-II-2011 Part-1A

Conventional Paper-II-2011 Part-1A Conventional Paper-II-2011 Part-1A 1(a) (b) (c) (d) (e) (f) (g) (h) The purpose of providing dummy coils in the armature of a DC machine is to: (A) Increase voltage induced (B) Decrease the armature resistance

More information

Power Conditioning Equipment for Improvement of Power Quality in Distribution Systems M. Weinhold R. Zurowski T. Mangold L. Voss

Power Conditioning Equipment for Improvement of Power Quality in Distribution Systems M. Weinhold R. Zurowski T. Mangold L. Voss Power Conditioning Equipment for Improvement of Power Quality in Distribution Systems M. Weinhold R. Zurowski T. Mangold L. Voss Siemens AG, EV NP3 P.O. Box 3220 91050 Erlangen, Germany e-mail: Michael.Weinhold@erls04.siemens.de

More information

Type Ordering Code Package TDA Q67000-A5066 P-DIP-8-1

Type Ordering Code Package TDA Q67000-A5066 P-DIP-8-1 Control IC for Switched-Mode Power Supplies using MOS-Transistor TDA 4605-3 Bipolar IC Features Fold-back characteristics provides overload protection for external components Burst operation under secondary

More information

TDA Power Factor Controller. IC for High Power Factor and Active Harmonic Filtering

TDA Power Factor Controller. IC for High Power Factor and Active Harmonic Filtering Power Factor Controller IC for High Power Factor and Active Harmonic Filtering TDA 4817 Advance Information Bipolar IC Features IC for sinusoidal line-current consumption Power factor approaching 1 Controls

More information

MINI-PS AC/24DC/1.3

MINI-PS AC/24DC/1.3 Power supply unit INTERFACE Data sheet 102894_en_03 1 Description PHOENIX CONTACT 2015-11-17 Features MINI POWER power supplies for MCR technology In measurement and control technology (MCR), modular electronics

More information

Generator Protection GENERATOR CONTROL AND PROTECTION

Generator Protection GENERATOR CONTROL AND PROTECTION Generator Protection Generator Protection Introduction Device Numbers Symmetrical Components Fault Current Behavior Generator Grounding Stator Phase Fault (87G) Field Ground Fault (64F) Stator Ground Fault

More information

I -limiter The world s fastest switching device

I -limiter The world s fastest switching device I S -limiter 2 I S -limiter The world s fastest switching device Reduces substation cost Solves short-circuit problems in new substations and substation extensions Optimum solution for interconnection

More information

Magnetization System of Magnetically Controlled Shunt Reactors

Magnetization System of Magnetically Controlled Shunt Reactors Magnetization System of Magnetically Controlled Shunt Reactors Leonid Kontorovych, Technical Director of ZTR PJSC, PH.D. in Engineering Sciences; Igor Shyrokov, head of the department of reactors control

More information

Functional Range. IWE - Earth Fault Relay. C&S Protection & Control Ltd.

Functional Range. IWE - Earth Fault Relay. C&S Protection & Control Ltd. Functional Range - Earth Fault Relay C&S Protection & Control Ltd. 2 Contents Page No. 1. Application 2. Operating Principle. Current Transformer Connections 5. Connections, Contact Arrangement and Setting

More information

Onsite Mobile AC High Voltage Test System

Onsite Mobile AC High Voltage Test System TSGMF(T) series Onsite Mobile AC High Voltage Test System Onsite mobile AC high voltage test systems are used for withstand voltage testing, partial discharge measurement, tan delta measurement to instrument

More information

4Q POWER AMPLIFIERS AC AND DC 3000VA 3x3000VA

4Q POWER AMPLIFIERS AC AND DC 3000VA 3x3000VA PERFORMANCES High accuracy High stability Fast transients High inrush current facilities Wide bandwidth 25 khz at -3dB Internal waveform DC and up to 10 khz Very low distortion Quadrant change without

More information

DIGITAL EXCITATION SYSTEM PROVIDES ENHANCED PERFORMANCE AND IMPROVED DIAGNOSTICS

DIGITAL EXCITATION SYSTEM PROVIDES ENHANCED PERFORMANCE AND IMPROVED DIAGNOSTICS DIGITAL EXCITATION SYSTEM PROVIDES ENHANCED PERFORMANCE AND IMPROVED DIAGNOSTICS C. Allan Morse Member, IEEE Eaton / Cutler Hammer 221 Heywood Road Arden, NC 2874 C. Richard Mummert Member, IEEE Eaton

More information

APPLICATION: The heart of the system is a DSR 100 Digital Static Regulator used in conjunction with standard SCR based rectifier bridges.

APPLICATION: The heart of the system is a DSR 100 Digital Static Regulator used in conjunction with standard SCR based rectifier bridges. APPLICATION: Basler Electric offers a New Line of digitally controlled brush (static) or brushless excitation systems designed for use with existing Hydro, Gas as well as Diesel driven generators requiring

More information

Aggravation with voltage?

Aggravation with voltage? Voltage Regulator Aggravation with voltage? At photovoltaic plants, long lines or increasing energy consumption?...then the voltage regulator can help Quick regulation from 300-700 ms Regulation of each

More information

GENERATOR INTERCONNECTION APPLICATION FOR ALL PROJECTS WITH AGGREGATE GENERATOR OUTPUT OF MORE THAN 2 MW

GENERATOR INTERCONNECTION APPLICATION FOR ALL PROJECTS WITH AGGREGATE GENERATOR OUTPUT OF MORE THAN 2 MW GENERATOR INTERCONNECTION APPLICATION FOR ALL PROJECTS WITH AGGREGATE GENERATOR OUTPUT OF MORE THAN 2 MW Electric Utility Contact Information DTE Energy Interconnection Coordinator One Energy Plaza, SB

More information

SPECIFICATION, CONTROLS AND ACCESSORIES

SPECIFICATION, CONTROLS AND ACCESSORIES AS440 Automatic Voltage Regulator (AVR) SPECIFICATION, CONTROLS AND ACCESSORIES English Original Instructions A043Y697 (Issue 2) Table of Contents 1. DESCRIPTION... 1 2. SPECIFICATION... 3 3. CONTROLS...

More information

Requirements for Offshore Grid Connections. in the. Grid of TenneT TSO GmbH

Requirements for Offshore Grid Connections. in the. Grid of TenneT TSO GmbH Requirements for Offshore Grid Connections in the Grid of TenneT TSO GmbH Bernecker Straße 70, 95448 Bayreuth Updated: 5th October 2010 1/10 Requirements for Offshore Grid Connections in the Grid of TenneT

More information

Electrical And Electronics Engg

Electrical And Electronics Engg Electrical And Electronics Engg Rectifier Cubical panel type Voltage 3Ph 440V /(0-300V) DC 3Ph Isolation transformer-20kva Thyristor rating Current -300A/PIV - 1500V over load protection and necessary

More information

MINI-PS AC/2X15DC/1

MINI-PS AC/2X15DC/1 MII-PS-100-240AC/2X15DC/1 Power supply unit ITERFACE Data sheet 100299_en_04 1 Description PHOEIX COTACT - 2010-10-20 Features MII POWER is the extremely slim power supply unit with constructional widths

More information

XR1 Rotor Earth Fault Relay. (May 2007) Manual XR1 (Revision New)

XR1 Rotor Earth Fault Relay. (May 2007) Manual XR1 (Revision New) XR1 Rotor Earth Fault Relay (May 2007) Manual XR1 (Revision New) Woodward Manual XR1 GB Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided

More information

ELECTRICAL POWER ENGINEERING

ELECTRICAL POWER ENGINEERING Introduction This trainer has been designed to provide students with a fully comprehensive knowledge in Electrical Power Engineering systems. The trainer is composed of a set of modules for the simulation

More information

ESB National Grid Transmission Planning Criteria

ESB National Grid Transmission Planning Criteria ESB National Grid Transmission Planning Criteria 1 General Principles 1.1 Objective The specific function of transmission planning is to ensure the co-ordinated development of a reliable, efficient, and

More information

Transformer protection IED RET 670

Transformer protection IED RET 670 Gunnar Stranne Transformer protection IED RET 670 Santiago Septiembre 5, 2006 1 Transformer protection IED RET670 2 Introduction features and applications Differential protection functions Restricted Earth

More information

Dynamic Performance of an Excitation System Built in a Digital Way

Dynamic Performance of an Excitation System Built in a Digital Way Dynamic Performance of an Excitation System Built in a Digital Way M.L. Orozco, H. Vásquez 1 Universidad del Valle, Escuela de Ingeniería Eléctrica y Electrónica, Cali, Colombia, email : maloroz@hotmail.com

More information

System Protection and Control Subcommittee

System Protection and Control Subcommittee Power Plant and Transmission System Protection Coordination Volts Per Hertz (24), Undervoltage (27), Overvoltage (59), and Under/Overfrequency (81) Protection System Protection and Control Subcommittee

More information

SGMF(T) series. Onsite Mobile AC High Voltage Test System. Applications:

SGMF(T) series. Onsite Mobile AC High Voltage Test System. Applications: SGMF(T) series Onsite Mobile AC High Voltage Test System On-site AC high voltage test systems are used for voltage withstanding test, partial discharge measurement, tan delta measurement on those instrument

More information

PE Electrical Machine / Power Electronics. Power Electronics Training System. ufeatures. } List of Experiments

PE Electrical Machine / Power Electronics. Power Electronics Training System. ufeatures. } List of Experiments Electrical Machine / Power Electronics PE-5000 Power Electronics Training System The PE-5000 Power Electronics Training System consists of 28 experimental modules, a three-phase squirrel cage motor, load,

More information

DC 4Q POWER AMPLIFIER 200kW 2 RANGES HIGH POWER RS232

DC 4Q POWER AMPLIFIER 200kW 2 RANGES HIGH POWER RS232 PERFORMANCES High accuracy High stability Fast transients High inrush current facilities Very low noise Very low output impedance Quadrant change without transition Power analyzer included Reverse polarity

More information

Protection relays and transformers

Protection relays and transformers NEW ZEALAND WWW.LPINZ.CO.NZ Unit 6/22 Moselle Ave, Henderson, Auckland, New Zealand PO Box 21-872, Henderson, Auckland, New Zealand Phone:+64 9 833 5749 Email:info@LPINZ.co.nz Web: www.lpinz.co.nz Protection

More information

EN 50178, IEC

EN 50178, IEC Type: DF51 322 1K5 Article No.: 289107 Sales text """Frequency inverter DF51(1,5 kw; 230V) Ordering information Rated voltage U e V Max. rated operational current I e A 7.1 Rated power for motors at 230

More information

Increasing security. Saving space. Gaining flexibility. Signal Conditioners for Industrial Automation

Increasing security. Saving space. Gaining flexibility. Signal Conditioners for Industrial Automation Increasing security. Saving space. Gaining flexibility. Signal Conditioners for Industrial Automation The SC-System: Interference-Free Signals, Maximum Performance The SC-System from Pepperl+Fuchs offers

More information

PHOENIX CONTACT - 06/2008. Features. DANGER OF EXPLOSION! Only remove equipment when it is disconnected and not in the potentially explosive area.

PHOENIX CONTACT - 06/2008. Features. DANGER OF EXPLOSION! Only remove equipment when it is disconnected and not in the potentially explosive area. Primary-switched power supply with SFB technology, 1 AC, output current 20 A INTERFACE Data Sheet 103383_en_00 1 Description PHOENIX CONTACT - 06/2008 Features QUINT POWER power supply units highest system

More information

QUINT-PS AC/24DC/40

QUINT-PS AC/24DC/40 Power supply unit INTERFACE Data sheet 102315_en_02 1 Description PHOENIX CONTACT 2010-04-23 Features QUINT POWER power supply units for plant and special engineering reliably start heavy loads with high

More information

LV Compensation & Filtering Products

LV Compensation & Filtering Products GE Grid Solutions LV Compensation & Filtering Products Providing Power Quality and Energy Efficiency Low (LV) reactive power compensation and harmonic filtering solutions help customers to improve the

More information

TABLE OF CONTENT

TABLE OF CONTENT Page : 1 of 34 Project Engineering Standard www.klmtechgroup.com KLM Technology #03-12 Block Aronia, Jalan Sri Perkasa 2 Taman Tampoi Utama 81200 Johor Bahru Malaysia TABLE OF CONTENT SCOPE 3 REFERENCES

More information

Power factor correction and harmonic filtering. Automatic power factor regulators

Power factor correction and harmonic filtering. Automatic power factor regulators Power factor correction and harmonic filtering Automatic power factor regulators Automatic power factor reguladors R.1 - Automatic power factor regulators Selection table R1-4 computer Plus-T Intelligent

More information

Index 2. G Gain settings 4 31 Glossary of terms A 2 Grommets 2 13

Index 2. G Gain settings 4 31 Glossary of terms A 2 Grommets 2 13 Index A A Group functions 3 9 AC reactors 5 3 Acceleration 1 15, 3 8 characteristic curves 3 26 second function 3 24 two-stage 4 19 Acceleration stop function 3 21 Access levels 3 5, 3 36, 4 25 Access

More information

Frequently Asked Questions (FAQs) MV1000 Drive

Frequently Asked Questions (FAQs) MV1000 Drive QUESTION 1. What is a conventional PWM Inverter? 2. What is a medium voltage inverter? 3. Are all MV inverters Voltage Source (VSI) design? 4. What is a Current Source Inverter (CSI)? 5. What output power

More information

A New Concept of Power Quality Monitoring

A New Concept of Power Quality Monitoring A New Concept of Power Quality Monitoring Victor Anunciada 1, Hugo Ribeiro 2 1 Instituto de Telecomunicações, Instituto Superior Técnico, Lisboa, Portugal, avaa@lx.it.pt 2 Instituto de Telecomunicações,

More information

Power Plant and Transmission System Protection Coordination of-field (40) and Out-of. of-step Protection (78)

Power Plant and Transmission System Protection Coordination of-field (40) and Out-of. of-step Protection (78) Power Plant and Transmission System Protection Coordination Loss-of of-field (40) and Out-of of-step Protection (78) System Protection and Control Subcommittee Protection Coordination Workshop Phoenix,

More information

ISO Rules Part 500 Facilities Division 502 Technical Requirements Section Aggregated Generating Facilities Technical Requirements

ISO Rules Part 500 Facilities Division 502 Technical Requirements Section Aggregated Generating Facilities Technical Requirements Division 502 Technical Applicability 1(1) Section 502.1 applies to: Expedited Filing Draft August 22, 2017 the legal owner of an aggregated generating facility directly connected to the transmission system

More information

VOLTAGE REGULATOR R 449. Installation and maintenance. This manual must be sent to the end user R 449 X2 Z1 X1 Z2 E+ E- (12V - 10A)

VOLTAGE REGULATOR R 449. Installation and maintenance. This manual must be sent to the end user R 449 X2 Z1 X1 Z2 E+ E- (12V - 10A) This manual must be sent to the end user X2 Z1 X1 Z2 E+ E- J1 t (12V - 10A) ~ 10 ohms Exciter field + - Isolated DC power supply Installation and maintenance WARNING TO AVOID HARM EITHER TO PEOPLE OR TO

More information

Generator Advanced Concepts

Generator Advanced Concepts Generator Advanced Concepts Common Topics, The Practical Side Machine Output Voltage Equation Pitch Harmonics Circulating Currents when Paralleling Reactances and Time Constants Three Generator Curves

More information

Impact Assessment Generator Form

Impact Assessment Generator Form Impact Assessment Generator Form This connection impact assessment form provides information for the Connection Assessment and Connection Cost Estimate. Date: (dd/mm/yyyy) Consultant/Developer Name: Project

More information

Power factor correction and harmonic filtering. Automatic power factor regulators R.1

Power factor correction and harmonic filtering. Automatic power factor regulators R.1 Power factor correction and harmonic filtering Automatic power factor regulators R.1 R.1 Automatic power factor regulators R.1 - Automatic power factor regulators Selection table R1-4 computer Plus-T Intelligent

More information

RT-5005/5006/5007/5008

RT-5005/5006/5007/5008 Replaces: 09.12 Electro-hydraulic Control Digital Proportional Amplifier Type: RT-5005/5006/5007/5008 Series: 3X Table of contents Contents Page Features 1 Ordering code 2 Functional description 2 Block

More information

Type of loads Active load torque: - Passive load torque :-

Type of loads Active load torque: - Passive load torque :- Type of loads Active load torque: - Active torques continues to act in the same direction irrespective of the direction of the drive. e.g. gravitational force or deformation in elastic bodies. Passive

More information

ENGINEERING DATA SUBMITTAL For the Interconnection of Generation System

ENGINEERING DATA SUBMITTAL For the Interconnection of Generation System WHO SHOULD FILE THIS SUBMITTAL: Anyone in the final stages of interconnecting a Generation System with Nodak Electric Cooperative, Inc. This submittal shall be completed and provided to Nodak Electric

More information

XR1 Rotor Earth Fault Relay. Manual XR1 (Revision C)

XR1 Rotor Earth Fault Relay. Manual XR1 (Revision C) XR1 Rotor Earth Fault Relay Manual XR1 (Revision C) Woodward Manual XR1 (EN) Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided by

More information

Siemens AG Allows easy and consistent configuration with one series of overload relays (for small to large loads)

Siemens AG Allows easy and consistent configuration with one series of overload relays (for small to large loads) Overview Features Benefits 3RU11 3RB20/3RB21 3RB22/3RB23 Sizes Are coordinated with the dimensions, connections S00...S3 S00... S12 S00... S12 and technical characteristics of the other devices in the

More information

PHOENIX CONTACT - 05/2008. DANGER OF EXPLOSION! Remove an item only when it is not connected to power or if it is located in the non-explosive area.

PHOENIX CONTACT - 05/2008. DANGER OF EXPLOSION! Remove an item only when it is not connected to power or if it is located in the non-explosive area. Primary-switched power supply with SFB technology, 1 AC, output current 20 A INTERFACE Data Sheet 103129_en_01 PHOENIX CONTACT - 05/2008 1 Description QUINT POWER power supply units highest system availability

More information

Multimeter 500CVD21 RTU500 series

Multimeter 500CVD21 RTU500 series Remote Terminal Units - Data sheet Multimeter 500CVD21 RTU500 series CT/VT interface with 4 voltage and 24 current inputs for direct monitoring of 3/4 wire 0 300 V AC (line to earth), 0...500 V AC (phase

More information

IDAHO PURPA GENERATOR INTERCONNECTION REQUEST (Application Form)

IDAHO PURPA GENERATOR INTERCONNECTION REQUEST (Application Form) IDAHO PURPA GENERATOR INTERCONNECTION REQUEST (Application Form) Transmission Provider: IDAHO POWER COMPANY Designated Contact Person: Jeremiah Creason Address: 1221 W. Idaho Street, Boise ID 83702 Telephone

More information

Chapter -3 ANALYSIS OF HVDC SYSTEM MODEL. Basically the HVDC transmission consists in the basic case of two

Chapter -3 ANALYSIS OF HVDC SYSTEM MODEL. Basically the HVDC transmission consists in the basic case of two Chapter -3 ANALYSIS OF HVDC SYSTEM MODEL Basically the HVDC transmission consists in the basic case of two convertor stations which are connected to each other by a transmission link consisting of an overhead

More information

Page ENSC387 - Introduction to Electro-Mechanical Sensors and Actuators: Simon Fraser University Engineering Science

Page ENSC387 - Introduction to Electro-Mechanical Sensors and Actuators: Simon Fraser University Engineering Science Motor Driver and Feedback Control: The feedback control system of a dc motor typically consists of a microcontroller, which provides drive commands (rotation and direction) to the driver. The driver is

More information

SELCO T-Line Generator Control, Protection and Monitoring

SELCO T-Line Generator Control, Protection and Monitoring SELCO T-Line Generator Control, Protection and Monitoring SYNCHROSCOPE TOO SLOW SYNC TOO FAST BUS GEN www.selco.com Selco T-Line The Selco T-line offers a complete range of system components for generator

More information

EE171. H.H. Sheikh Sultan Tower (0) Floor Corniche Street Abu Dhabi U.A.E

EE171. H.H. Sheikh Sultan Tower (0) Floor Corniche Street Abu Dhabi U.A.E EE171 Electrical Equipment & Control System: Electrical Maintenance Transformers, Motors, Variable Speed Drives, Generators, Circuit Breakers, Switchgears & Protective Systems H.H. Sheikh Sultan Tower

More information

Scope of functions 32R

Scope of functions 32R Scope of functions 21 32 32R 46 64 78 Fig. 1 7UM516 generator protection Application The 7UM516 is a numerical generator protection relay and is mainly used with larger generation units. In most cases

More information

A Subsidiary of Regal-Beloit Corporation. AC Inverter Terminology

A Subsidiary of Regal-Beloit Corporation. AC Inverter Terminology AP200-9/01 Acceleration The rate of change in velocity as a function of time. Acceleration usually refers to increasing velocity and deceleration to decreasing velocity. Acceleration Boost During acceleration,

More information

ENS31 Automatic Isolation Unit Product Description

ENS31 Automatic Isolation Unit Product Description ENS31 Automatic Isolation Unit Product Description Issue 09/2005 UfE Umweltfreundliche Energieanlagen GmbH Joachim-Jungius-Straße 9 D 18059 Rostock Tel.: +49 3 81 / 405 97 05 Fax: +49 3 81 / 405 97 03

More information

CONTENTS. 1. Introduction Generating Stations 9 40

CONTENTS. 1. Introduction Generating Stations 9 40 CONTENTS 1. Introduction 1 8 Importance of Electrical Energy Generation of Electrical Energy Sources of Energy Comparison of Energy Sources Units of Energy Relationship among Energy Units Efficiency Calorific

More information

GENERATOR INTERCONNECTION APPLICATION Category 3 For All Projects with Aggregate Generator Output of More Than 150 kw but Less Than or Equal to 550 kw

GENERATOR INTERCONNECTION APPLICATION Category 3 For All Projects with Aggregate Generator Output of More Than 150 kw but Less Than or Equal to 550 kw GENERATOR INTERCONNECTION APPLICATION Category 3 For All Projects with Aggregate Generator Output of More Than 150 kw but Less Than or Equal to 550 kw ELECTRIC UTILITY CONTACT INFORMATION Consumers Energy

More information

PD300. Transformer, generator and motor protection Data sheet

PD300. Transformer, generator and motor protection Data sheet PD300 Transformer, generator and motor protection Data sheet DSE_PD300_eng_AO No part of this publication may be reproduced by whatever means without the prior written permission of Ingeteam T&D. One of

More information

Speed Control Of Transformer Cooler Control By Using PWM

Speed Control Of Transformer Cooler Control By Using PWM Speed Control Of Transformer Cooler Control By Using PWM Bhushan Rakhonde 1, Santosh V. Shinde 2, Swapnil R. Unhone 3 1 (assistant professor,department Electrical Egg.(E&P), Des s Coet / S.G.B.A.University,

More information

TD 1000 PLUS. Secondary Injection Relay Test Set. Designed for testing relays and transducers

TD 1000 PLUS. Secondary Injection Relay Test Set. Designed for testing relays and transducers Secondary Injection Relay Test Set Designed for testing relays and transducers Two current outputs to test differential relays Convertible current and voltage generator With phase angle shifter Frequency

More information

10/2 Product overview. 10/3 4AC3 0, 4AC3 1 bell transformers. 10/5 4AC AC3 6 transformers for permanent loads. 10/8 4AC2 4 power supply units

10/2 Product overview. 10/3 4AC3 0, 4AC3 1 bell transformers. 10/5 4AC AC3 6 transformers for permanent loads. 10/8 4AC2 4 power supply units BETA Switching Transformers, Bells and Socket Outlets /2 Product overview /3 4AC3 0, 4AC3 1 bell transformers /5 4AC3 4... 4AC3 transformers for permanent loads /8 4AC2 4 power supply units / 7LQ2 2 bells

More information

Design and Simulation of Passive Filter

Design and Simulation of Passive Filter Chapter 3 Design and Simulation of Passive Filter 3.1 Introduction Passive LC filters are conventionally used to suppress the harmonic distortion in power system. In general they consist of various shunt

More information

RETROFITTING. Motor Protection Relay. Two mountings are available, Flush Rear Connection (EDPAR) or Projecting Rear Connection (SDPAR).

RETROFITTING. Motor Protection Relay. Two mountings are available, Flush Rear Connection (EDPAR) or Projecting Rear Connection (SDPAR). RETROFITTING Motor Protection Relay NPM800R (R2 case) and NPM800RE (R3 case) are dedicated to the refurbishment of 7000 series (R2 and R3 cases) of CEE relays providing the protection of medium voltage

More information

Sequence Networks p. 26 Sequence Network Connections and Voltages p. 27 Network Connections for Fault and General Unbalances p. 28 Sequence Network

Sequence Networks p. 26 Sequence Network Connections and Voltages p. 27 Network Connections for Fault and General Unbalances p. 28 Sequence Network Preface p. iii Introduction and General Philosophies p. 1 Introduction p. 1 Classification of Relays p. 1 Analog/Digital/Numerical p. 2 Protective Relaying Systems and Their Design p. 2 Design Criteria

More information

Advanced Test Equipment Rentals ATEC (2832) CIBANO in-1 test system for medium- and high-voltage circuit breakers

Advanced Test Equipment Rentals ATEC (2832) CIBANO in-1 test system for medium- and high-voltage circuit breakers Established 1981 Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) CIBANO 500 3-in-1 test system for medium- and high-voltage circuit breakers Medium- and high-voltage circuit breaker

More information

Capacitor Switching Contactors

Capacitor Switching Contactors Capacitor Switching D385E51 Technical catalogues and news under: www.benedict.at Motor-Starter Mini- Overload Relays Capacitor Switching Motor-Starters Modular Circuit Breakers M4-32T... up to 32A M4-32R..

More information