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ABB REU 523 Manual
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ABB REU 523 Manual

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Features
Combined overvoltage and undervoltage
relay
• Single or three-phase use
• High-set overvoltage stage with definite-
time or inverse definite minimum time
(IDMT) characteristic
• Low-set overvoltage stage with definite-
time or IDMT characteristic
• High-set undervoltage stage with definite-
time or IDMT characteristic
• Low-set undervoltage stage with definite-
time or IDMT characteristic
• Positive-phase-sequence protection
• Ajustable drop-off/pick-up ratio for the low-
set stages
• Circuit-breaker failure protection (CBFP)
• Disturbance recorder
- recording time up to 12 seconds
- triggering by a start or a trip signal from
a protection stage and/or by a binary
input signal
- records three analogue channels and
eight digital channels
- adjustable sampling rate
• Non-volatile memory for
- up to 60 event codes
- setting values
- disturbance recorder data
- recorded data of the five last events with
time stamp
- number of starts for each stage
REU 523
1MRS 751123-MBG
Issued: 15.06.1999
Status: Updated
Version: C/16.10.2002
Data subject to change without notice
- alarm indication messages and LEDs
showing the status at the moment of
power failure
• Galvanically isolated binary input with a
wide input voltage range
• All settings can be modified with a personal
computer
• HMI with an alphanumeric LCD and
manoeuvring buttons
• IEC 60870-5-103 and SPA bus communi-
cation protocols
• Two normally open power output contacts
• Two change-over signal output contacts
• Output contact functions freely config-
urable for desired operation
• Optical PC-connector for two-way data
communication (front)
• RS-485 connector (rear) for system com-
munication
• Continuous self-supervision of electronics
and software. At an internal relay fault
(IRF), all protection stages and outputs are
blocked.
• User-selectable rated frequency 50/60 Hz
• User-selectable password protection for
the HMI
• User-selectable nominal voltage
100/110/115/120 V
• Display of primary voltage values
• Demand values
• Multi-language support
1

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Summary of Contents for ABB REU 523

  • Page 1 Combined overvoltage and undervoltage REU 523 relay 1MRS 751123-MBG Issued: 15.06.1999 Status: Updated Version: C/16.10.2002 Data subject to change without notice Features • Single or three-phase use - alarm indication messages and LEDs showing the status at the moment of •...
  • Page 2 REU 523 relay 1MRS 751123-MBG Application The over and undervoltage relay REU 523 is alternatively be set to evaluate the positive- a secondary relay which is connected to the phase-sequence voltage. In addition, the high- voltage transformers of the object to be pro- set undervoltage stage can be configured to tected.
  • Page 3 U< can be set to be blocked by the start of stage U<<. The The HMI of the REU 523 is equipped with tripping of an undervoltage stage can also be six push-buttons and an alphanumeric 2 x 16 blocked by applying an external binary input characters’...

  • Page 4: Auxiliary Supply Voltage

    1MRS 751123-MBG The REU 523 is interfaced with a fibre-optic The REU 523 can also be connected to the bus by means of the bus connection module Lon bus using a LON-SPA Gateway. RER 103 via the D9S-type RS-485 connector on the rear panel of the device.

  • Page 5: Technical Data

    Combined overvoltage and undervoltage REU 523 relay 1MRS 751123-MBG 7DEOH  (QHUJL]LQJ LQSXWV Technical data 50/60 Hz ±5 Hz Rated frequency Rated voltage, U 100/110/115/120 V Maximum input voltage - continuously 2 x U - for 10 s 3 x U Power consumption at U <...
  • Page 6 Combined overvoltage and undervoltage REU 523 relay 1MRS 751123-MBG 7DEOH  $X[LOLDU\ VXSSO\ YROWDJH rated Ur =110/120/220/240 V ac Ur =48/60/110/125/220 V dc variation 80…265 V ac 38…265 V dc Relay power start-up time, typical 300 ms Burden of auxiliary supply under...
  • Page 7 Combined overvoltage and undervoltage REU 523 relay 1MRS 751123-MBG 7DEOH  (OHFWURPDJQHWLF FRPSDWLELOLW\ WHVWV - for air discharge 8 kV Radio frequency interference tests - conducted, common mode According to the IEC 61000-4-6, IEC 60255-22-6 (2000) 10 V (rms), f = 150 kHz…80 MHz...

  • Page 8: Connection Diagram

    Combined overvoltage and undervoltage REU 523 relay 1MRS 751123-MBG Connection diagram U aux RER 103 X2.1 X1.1 17 18 13 14 15 10 11 12 Optical PC-interface SGR1 START 3U> SGB1 SGR2 TRIP Blocking of stage U> SGR3 3U>> START...
  • Page 9 • LIB 510 Library for MicroSCADA; LIB support the new functions and features of 510 v. 4.0.3-1, or later REU 523 Release B: • SMS 510 Substation Monitoring System; • CAP 505 Relay Product Engineering SMS 510 v. 1.0.0-3, or later Tools;...
  • Page 10 ABB Oy Substation Automation P.O. Box 699 FIN-65101 Vaasa, Finland Tel +358 10 22 11 Fax +358 10 224 1094 www.abb.com/substationautomation...