ABB REM 610 Technical Reference Manual page 52

REM 610
52
Motor Protection Relay
Technical Reference Manual
Table 4.1.4.13-6 Stage I
Feature
Operate time accuracy at
definite-time characteristic
Operation accuracy
• 1.0...10.0% I
n
• 10.0...100% I
n
Table 4.1.4.13-7 Stage I
Feature
Set start value, I >
2
• at IDMT characteristic
Start time, typical
Time/current characteristic
• IDMT
time constant, K
2
Resetting time, typical/maximum
Drop-off/pick-up ratio, typical
Operate time accuracy
• I > + 0.065...4.0 x I
2 n
Operation accuracy
Inhibition of I >
2
Table 4.1.4.13-8 Stage REV
Feature
Trip value
Time/current characteristic
• definite time
operate time
Resetting time, typical
Drop-off/pick-up ratio, typical
Table 4.1.4.13-9 Stage Σt
Feature
Set restart inhibit value, Σt
si
Countdown rate of start-up time
counter, ∆Σt /∆t
s
3)
>
0
Value
±2% of the set
operate time or
±25 ms
±5% of the set
start value
±3% of the set
start value
3)
>
2
Value
0.10...0.50 x I
n
100 ms
5...100
130/200 ms
0.95
±5% of the
calculated operate
time or ±100 ms
±5% of the set
start value
I < 0.12 x I or
n
I > 4.0 x I
n
4)
Value
NPS ≥ 75% of the
maximum phase
current
220 ms ±50 ms
100...200 ms
0.95
si
Value
5...500 s
2...250 s/h
1MRS 752263-MUM