ABB REU 523 Manual
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ABB REU 523 Manual

Combined overvoltage and undervoltage relay
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Features
Combined overvoltage and undervoltage
relay
• Over and undervoltage protection
• 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
• Adjustable drop-off/pick-up ratio for the
low-set stages
• Circuit-breaker failure protection (CBFP)
• Disturbance recording up to 12 seconds
- triggering by a start or a trip signal from
any 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: B/23.11.2001
Data subject to change without notice
- alarm indication messages and LEDs
showing the status at the moment of
power failure
• Three accurate voltage inputs
• 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 configura-
ble 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, all
stages and outputs are blocked
• User-selectable rated frequency 50/60 Hz
• User-selectable nominal voltage 100/110/
115/120 V
• User-selectable password protection for
the HMI
• 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: B/23.11.2001 Data subject to change without notice Features • Over and undervoltage protection - alarm indication messages and LEDs showing the status at the moment of •...

  • Page 2: Overvoltage Unit

    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 High-set stage U<< can be set out of opera- tion. This state will be indicated by three The HMI of the REU 523 is equipped with dashes “---” on the LCD and by “999” when six push-buttons and an alphanumeric 2 x 16 the set start value is read via serial communi- character LCD.

  • Page 4: Auxiliary Supply

    950001-1) will be required. recorder data, however, cannot be transferred using this protocol. The REU 523 can also be connected to the Lon bus using a LON-SPA Gateway. The REU 523 is provided with two serial communication ports, one on the rear panel Auxiliary Supply and the other on the front panel.

  • 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\ YROWDJH Interruption time in the auxiliary dc voltage without < 30 ms at 48 V dc resetting < 100 ms at 110 V dc < 500 ms at 220 V dc...
  • Page 7 Combined overvoltage and undervoltage REU 523 relay 1MRS 751123-MBG 7DEOH  (OHFWURPDJQHWLF FRPSDWLELOLW\ WHVWV 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 Radiated, amplitude-modulated According to the IEC 61000-4-3 IEC 60255-22-3 (2000) 10 V/m (rms), f = 80…1000 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 13 14 15 17 18 10 11 12 SGR1 START 3U> SGB1 SGR2 TRIP SGR3 START 3U>> SGB1 SGR4 TRIP SGR5 START 3U<...
  • Page 9 Revision Combined Overvoltage and Undervoltage relay :KHQ RUGHULQJ SOHDVH VSHFLI\ Ordering information: Ordering example: 1. Type designation and quantity REU 523, 5 pieces 2. Order number REU523B 409-BAA 3. Optical connection cable 1 piece (1MKC 950001-1) 2UGHU QXPEHUV Optical connection cable...
  • Page 10 ABB Oy P.O. Box 699 FIN-65101 Vaasa, Finland Tel +358 10 224 000 Fax +358 10 224 1094 www.abb.com/substationautomation...

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