ABB REU 523 Technical Reference Manual page 45

1MRS 750942-MUM
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
Table 4.1.10.4-7 Control parameters
Description
Re-reading of an event register
Type designation of the relay
Reading of relay state data
Resetting of relay state data
Time reading and setting
Date and time reading and setting D
Input and output signals
The measured voltages and the status of the binary input signal can be read (R) with
parameters I1...I4. When the value of parameter I4 is 1, the binary input will be
energized. The value of the calculated positive-phase-sequence voltage can be read
with parameter I5.
Table 4.1.10.4-8 Inputs
Description
Voltage U
12
Voltage U
23
Voltage U
31
Binary input signal
Positive-phase-sequence voltage
Each protection stage has its internal output signal. These signals can be read (R)
with parameters O1...O8. The state of he output contacts can be read (R) or changed
(W) with parameters O9...O12. When the value of any of parameters O1...O12 is
changed from 0 to 1, it will be recorded in the corresponding parameter O21...O32.
Table 4.1.10.4-9 Output signals
Status of the protection stages
Start of stage U>
Trip of stage U>
Start of stage U>>
Trip of stage U>>
Start of stage U<
Trip of stage U<
Start of stage U<<
Trip of stage U<<
Parameter R, W Value
B R Time, channel number and
event code
F R REU 523
C R 0 = normal state
1 = the relay has been subject
to an automatic reset
2 = overflow of an event register
3 = both events 1 and 2
C W 0 = resetting all events
1 = reset only E50
2 = reset only E51
4 = reset all events including
E51 except for E50
T R, W 00.000...59.999 s
R, W YY-MM-DD HH.MM;SS.sss
Parameters (R)
I1
I2
I3
I4
I5
State of stage Recorded
(R) functions (R)
O1 O21
O2 O22
O3 O23
O4 O24
O5 O25
O6 O26
O7 O27
O8 O28
REU 523
Value
0...2 x U
n
0...2 x U
n
0...2 x U
n
0 or 1
0...2 x U
n
Value
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
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