Trip-Circuit Supervision; Reu - ABB REU 610 Technical Reference Manual

1MRS755769
5.1.5.
Voltage Relay
Technical Reference Manual
Table 5.1.4.8.-2 Undervoltage protection, stages U<, U<< and U1< (Continued)
Feature
Retardation time, typical
Set resetting time, t <
r
Drop-off/pick-up ratio, D/P<
Operate time accuracy:
-at definite-time characteristic
-at IDMT characteristic
Operation accuracy
a)
Resetting time of the trip signal.
Table 5.1.4.8.-3 Residual overvoltage protection, stages U
Feature
Set start value U > and U
0
-at definite-time characteristic
Start time, typical
Time/voltage characteristic:
-definite-time operate time, t
Resetting time, typical/maximum
Retardation time, typical
Set resetting time, t >
0r
Drop-off/pick-up ratio, typical
Operate time accuracy:
-at definite-time characteristic
Operation accuracy
a)
Resetting time of the trip signal.
Table 5.1.4.8.-4 CBFP
Feature
Set operate time
Phase-to-phase voltage threshold for
external triggering of the CBFP:
-pick-up/drop-off

Trip-circuit supervision

The trip-circuit supervision ( TCS) detects open circuits, both when the circuit
breaker is open and closed, and trip-circuit supply failure.
Stage U<
30 ms
0.07...60.0 s
1.01...1.05
±2% of the set
operate time or
±25 ms
±25 ms or the
accuracy
appearing when
the measured
voltage varies
±3%
±1.5% of the set
start value
Stage U
0
>>:
0
2.0...80% U
70 ms
>, t >> 0.10...600 s
0 0
30/50 ms
30 ms
0.07...60.0 s
0.96
±2% of the set operate
time or ±25 ms
±1.5% of the set start
value or ±0.05% U
Value
0.10...60.0 s
0.15/0.10 × U

REU 610

Stage U<< Stage U
30 ms 50 ms
- -
1.01...1.05 1.04
±2% of the set ±2% of the set
operate time or operate time or
±25 ms ±25 ms
±25 ms or the ±25 ms or the
accuracy accuracy
appearing when appearing when
the measured the measured
voltage varies voltage varies
±3% ±3%
±1.5% of the set ±5% of the set
start value start value
> and U
0
> Stage U >>
0
2.0...80% U
n
60 ms
0.10...600 s
a) a)
30/50 ms
30 ms
100 ms
0.96
±2% of the set operate
time or ±25 ms
±1.5% of the set start
value or ±0.05% U
n
n
<
1
>>
0
n
n
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