ABB REU 523 Technical Reference Manual
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ABB REU 523 Technical Reference Manual

Combined overvoltage and undervoltage relay
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REU 523
Combined Overvoltage and
Undervoltage Relay
Technical Reference Manual
ABB Automation

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  • Page 1 REU 523 Combined Overvoltage and Undervoltage Relay Technical Reference Manual ABB Automation...

  • Page 3: Table Of Contents

    1MRS 750942-MUM Combined Overvoltage and REU 523 Undervoltage Relay Issued: 07.06.99 Version: A/16.11.99 Checked: H.S. Technical Reference Manual Approved: S-M.H. We reserve the right to change data without prior notice. Contents 1. Introduction ................5 1.1. About this manual .................5 1.2. The use of the relay ..............5 1.3.
  • Page 4 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual 4.1.7.3. Control and indication of recorder status ... 30 4.1.7.4. Triggering ............30 4.1.7.5. Settings and unloading ........30 4.1.7.6. Event code ............31 4.1.8. Recorded data ..............31 4.1.9.

  • Page 5: Introduction

    About this manual This manual is intended to provide the user with thorough information on the relay REU 523 and its applications. The focus in the manual is on technical description of the relay. Instructions for using the Man-Machine Interface (MMI) are found in separate “Operator’s Manual”...

  • Page 6: Guarantee

    • Rated frequency user-selectable 50/60 Hz • Nominal voltage user-selectable 100/110/115/120 V • User-selectable password protection for MMI • Display of primary voltage values 1.4. Guarantee Please inquire the guarantee of your nearest ABB representative. ABB Automation...

  • Page 7: Safety Information

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Safety Information Dangerous voltages can occur on the connectors, even though the auxiliary voltage is disconnected. National and local electrical safety regulations must always be followed. The frame of the protection relay has to be carefully earthed.

  • Page 8: Instructions

    Instructions 3.1. Application The overvoltage and undervoltage relay REU 523 is a secondary relay that is connected to the voltage transformers of an object to be protected. It is designed for overvoltage and undervoltage protection and supervision in distribution substations.

  • Page 9: Configuration

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Environmental conditions • Specified ambient service temperature range -10...+55 °C • Temperature influence on the operating values of the relay 0.1% / °C within the specified ambient service temperature range •...

  • Page 10: Technical Description

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Technical Description 4.1. Functional description 4.1.1. Product functions 4.1.1.1. Schema of product functions efinite- or inverse-time overvoltage protection, low-set stage Definite- or inverse-time overvoltage protection, high-set stage Definite- or inverse-time undervoltage...

  • Page 11: Inputs

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual 4.1.1.3. Inputs The relay includes three energizing inputs and one external binary input controlled by an external voltage. The function of the binary input is determined with selector switches of the protection relay.

  • Page 12: Configuration

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual READY START TRIP INTERNAL FAULT FAULT CODE :56 )LJ  ,QWHUQDO IDXOW Fault codes can indicate: • No response on output contact test. • Faulty program memory, work memory or parameter memory.

  • Page 13: Protection

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual 4.1.3. Protection 4.1.3.1. Block diagram SGR1/x 60 ms U> SGF1/1 t>, k> SGR2/x 40/80 ms SGB1/5 SGF4/1...2 SGF1/5 0.1 ... 1s U>> SGR3/x 50 ms SGF1/2 SGF2/6 t>>, k>>...

  • Page 14: Undervoltage Unit

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual The low-set and high-set stages of the overvoltage unit may be given a definite-time or an inverse definite minimum time (IDMT) characteristic. When the IDMT characteristic is chosen, two time/current curve groups called A and B are available.

  • Page 15: Positive-Phase-Sequence Protection

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual U/Un U< U<< 0.2 Un U< t< t< U<< t<< t<< )LJ  2SHUDWLRQ RI WKH XQGHUYROWDJH XQLW ZKHQ WKH IXQFWLRQ RI WKH KLJK VHW DQG ORZVHW XQGHUYROWDJH VWDJHV LV LQWHUQDOO\ EORFNHG LQ FDVH WKH YROWDJH IDOOV EHORZ  [ 8 4.1.3.4.

  • Page 16: Time/Voltage Characteristics

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual The voltage relay measuring the positive-phase-sequence voltage complements other methods, based on frequency relay and overcurrent relay, for disconnecting a smaller power plant. The positive-phase-sequence function can also be used instead of the conventional high-set three-phase undervoltage protection based on phase-to-phase voltages.
  • Page 17 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual The A- and B-type characteristics are illustrated in Fig. 4.1.3.5.-1 and Fig. 4.1.3.5.-2. Characteristic for undervoltage stages The IDMT characteristic curve group C is designed for undervoltage stages U< and U<<.
  • Page 18 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual 1000 k>, k>> 0,05 0,01 U/U>, U/U>> )LJ  7\SH $ FKDUDFWHULVWLFV 1000 k>, k>> 0,05 0,01 U/U>, U/U>> )LJ  7\SH % FKDUDFWHULVWLFV ABB Automation...

  • Page 19: Settings

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual 1000 k<, k<< 0,01 U/U<, U/U<< )LJ  7\SH & FKDUDFWHULVWLFV 4.1.3.6. Settings Two alternative setting groups, 1 and 2, are available for the relay. Either of these setting groups can be used as the actual settings, one group at a time.
  • Page 20 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.3.6-1 Setting values Setting Description Setting range Default setting U>/U Start voltage of stage U> as a multiple of the rated voltage of the energizing input. • definite and inverse time 0.60...1.40 x U...
  • Page 21 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Selector switchgroups SGF, SGB and SGR Part of the settings and the selections of the operation characteristics of the relay in various applications is made with selector switchgroups SG_. The switchgroups are software based and thus not physical switches to be found in the hardware of the relay.
  • Page 22 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual SGF1...SGF4 Switchgroups SGF1...SGF4 are used for configuring the desired functions as follows. Table 4.1.3.6-2 SGF1 Default Switch Function setting SGF1/1 Selection of the latching feature for output PO1...
  • Page 23 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Table 4.1.3.6-3 SGF2 Default Switch Function setting SGF2/3 Operation condition for stage U<< when the conventional undervoltage measurement is selected • 0 = Normal use for detecting loss of voltage when all voltages fall below the set value.
  • Page 24 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.3.6-4 SGF3 Default Switch Function setting SGF3/6 The operation mode for the trip indicator of stage U< • 0 = The trip indicator automatically resets once the fault disappears.
  • Page 25 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual SGB1 Table 4.1.3.6-6 SGB1 Resetting / blocking with BI Default Switch Function setting SGB1/1 • 0 = Indicators are not reset by the binary input signal. • 1 = Indicators are reset by the binary input signal.
  • Page 26 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Not in use Not in use Not in use Not in use Checksum (factory setting) SGR1 ∑ SGR1= U> (12) SGR2 ∑ SGR2= t> SGR3 ∑ SGR3= U>>...

  • Page 27: Technical Data Of Protection Functions

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual 4.1.3.7. Technical data of protection functions Table 4.1.3.7-1 Stages U> and U>> Feature Stage U> Stage U>> Start voltage and ∞ • at definite-time and inverse-time 0.60...1.40 x U 0.80...1.60 x U...

  • Page 28: Monitoring

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.3.7-2 Stages U< and U<< Feature Stage U< Stage U<< Start voltage and ∞ • at definite-time and inverse-time 0.30...1.20 x U 0.30...1.20 x U characteristics Start time, typical...

  • Page 29: Self-Supervision (Irf)

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual 4.1.5. Self-supervision (IRF) The relay is provided with an extensive self-supervision system that continuously supervises the software and the electronics of the relay. It handles run-time fault situations and informs the user about an existing fault via a LED on the MMI.

  • Page 30: Recorder Data

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual 4.1.7.2. Recorder data One recording contains the information of three analogue channels and eight digital channels for a period of 40 cycles. The analogue channels are the momentary voltages measured by the relay, and the digital channels are the operating signals of the protection stages and the external binary input signal linked to the relay.

  • Page 31: Event Code

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Parameter Description V245 Length of recording after triggering. The total recording length is 40 cycles. V246 Status of the recorder Used for giving the disturbance recorder a unique identification number Used for designating the disturbance recorder the name of the station where the relay is located.

  • Page 32: External Serial Communication

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.8-1 Recorded data REGISTER Recorded data EVENT1 The highest voltage value measured during the start sequence of an overvoltage stage as a multiple of the rated voltage U .

  • Page 33: Event Codes

    The front connector is standardized for ABB relay products and requires a specific opto-cable (ABB art. no 1MKC950001-1). The cable is connected to the serial RS-232C port of the PC and it is powered by RS-232C control signals.
  • Page 34 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.9.2-2 Event codes E1…E8 Code Event Weighting factor Default value Starting of stage U> Starting of stage U> reset Tripping of stage U> Tripping of stage U> reset Starting of stage U>>...

  • Page 35: Remote Transfer Data

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual 1 = included in event reporting Table 4.1.9.2-6 Event codes E50 and E51 Code Event Restart of relay Overflow of event register Events E50 and E51 are always included in event reporting.
  • Page 36 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Settings Table 4.1.9.3-1 Settings Actual Group 1 (R, Group 2 (R, Variable Setting range settings (R) W, P) W, P) Start voltage of stage U> 0.60...1.40 x U Operate time of stage U>...
  • Page 37 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Recorded data Parameter V1 indicates the highest and parameter V2 the lowest voltage value measured as multiples of the rated voltage U since the last reset. Parameter V3 shows the average voltage value during one minute’s time, updated once a minute.
  • Page 38 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual The last five recorded values can be read with parameters V11...V100. Event n denotes the latest recorded value, n-1 the next one, and so forth. Recorded data Recorded data...
  • Page 39 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Table 4.1.9.3-4 V parameters for disturbance recorder Description Parameter Value Internal trigger signals’ V241 0...127, see table 4.1.9.3-5 checksum Internal trigger signal’s V242 0...127, edge 0=rising, 1=falling External trigger signal (BI V243 0 / 1, see table 4.1.9.3-6...
  • Page 40 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.9.3-6 Disturbance recorder external triggering Default value of Default value of Weighting Event triggering mask, triggering edge, factor V243 V244 Not in use Not in use Checksum...
  • Page 41 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Control parameters Table 4.1.9.3-7 Control parameters Para- Description Value meter Resetting of output contacts with V101 1=reset the latching feature Resetting of registers and output V102 1=reset contacts with the latching feature...

  • Page 42: Input / Output Connections

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.1.9.3-7 Control parameters Para- Description Value meter Type designation of the relay REU 523 Reading of relay state data 0=normal state 1=relay been subject to automatic reset...

  • Page 43: Relay Parameterization

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Table 4.1.9.3-9 Output signals State of stage Recorded Status of the protection stages Value functions (R) Starting of stage U> 0 or 1 Tripping of stage U> 0 or 1 Starting of stage U>>...
  • Page 44 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual The binary input X2.1/17-18 can be used in three different ways: 1) as the binary input for an external blocking signal, 2) as the binary input for unlatching the trip relay, or 3) as the binary input for the remote control of relay settings.
  • Page 45 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual )LJ  5HDU YLHZ RI WKH FRPELQHG RYHUYROWDJH DQG XQGHUYROWDJH UHOD\ Table 4.2.1-1 Inputs for voltages Terminal Function X1.1-1 X1.1-3 X1.1-4 X1.1-6 X1.1-7 X1.1-9 *Note! The wiring has to be done identically for each of the matching transformers used.

  • Page 46: Serial Communication Connections

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.2.1-2 Auxiliary supply voltage Terminal Function X2.1-1 Input+ X2.1-2 Input- Table 4.2.1-3 Output contacts Terminal Function X2.1-3 PO1, closing contact X2.1-4 X2.1-5 PO2, closing contact X2.1-6 X2.1-7 SO1, common X2.1-8...

  • Page 47: Technical Data

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual The optical PC-connection on the relay front panel is used to connect the relay to a fibre-optic SPA bus via an opto-cable 1MKC950001-1. Table 4.2.2-1 SPA logic/ RS-485 connection for RER 103...
  • Page 48 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.2.3-4 Measuring range Measured voltages on phases U and U as multiples of 0…2 x U the rated voltages of the energizing inputs ±5 Hz) at 0.20...2.00 x U ±1.5 %...
  • Page 49 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Table 4.2.3-10 Electromagnetic compatibility tests EMC immunity test level requirements consider the demands in the generic standard EN 50082-2 1 MHz burst disturbance test, class III According to IEC 60255-22-1 •...
  • Page 50 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 4.2.3-11 Standard tests Insulation tests According to IEC 60255-5 Dielectric tests • Test voltage 2 kV, 50 Hz, 1 min Impulse voltage test According to IEC 60255-5 5 kV, unipolar impulses, waveform 1.2/50 µs,...

  • Page 51: Ordering Information

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Ordering Information Order number REU523A 409-BAA Protective cover for rear connectors 1MRS060132 Flush mounting kit 1MRS050209 Semi-flush mounting kit 1MRS050253 Wall mounting kit 1MRS050240 Side-by-side mounting kit 1MRS050241 19”...

  • Page 52: References

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual References Other available manuals: • Operator’s Manual, 1MRS751057-MUM • Installation Manual, 1MRS750526-MUM ABB Automation...

  • Page 53: Index

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Index Abbreviations .......................53 Application ......................8 Auxiliary voltage ..................45 Binary input (BI) ..................19 Block diagram ......................13 CBFP ......................5 Characteristic for undervoltage stages ..............17 Characteristics for overvoltage stages ..............16 Checksum calculation ..................21...
  • Page 54 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Password ....................... 11 Positive-phase-sequence ..................15 Power supply ......................46 Recorded data ....................31 Recorder data .......................30 Remote transfer data ....................35 Safety information ....................7 Self-supervision .................... 11 Serial communication ................... 32 Setting and connection ...................9...

  • Page 55: Check Lists

    Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Check Lists Table 8.-1 Setting group 1 Group 1 Customer’s Variable Setting range Default setting (R, W, P) setting Start voltage of stage U> 0.60...1.40 x U 1.20 x U Operate time of stage U>...
  • Page 56 REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Table 8.-2 Setting group 2 Group 2 Customer’s Variable Setting range Default setting (R, W, P) setting Operate time of stage U< 0.10...600 s 0.10 s Time multiplier k<...
  • Page 57 Combined Overvoltage and Undervoltage Relay REU 523 1MRS 750942-MUM Technical Reference Manual Table 8.-4 Parameters for disturbance recorder Customer’s Information Parameter Setting range Default setting setting Event mask for disturbance V158 0 / 1 recorder Internal trigger signals’ V241 0...127 checksum Internal trigger signal’s edge...

  • Page 58: Customer Feedback

    REU 523 Combined Overvoltage and Undervoltage Relay 1MRS 750942-MUM Technical Reference Manual Customer Feedback Date: To fax: +358 10 224 1094 Category: Comment Query Complaint In case of feedback related to a specific product, please state the name of the product.
  • Page 60 ABB Substation Automation Oy P.O. Box 699 FIN-65101 VAASA Finland Tel. +358 10 224 000 Fax. +358 10 224 1094 www.abb.com/fi...

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