ABB REM610 Product Manual page 21

ABB
Motor Protection
REM610
Product version: C
Table 22. Three-phase instantaneous or definite time short circuit protection (I>>)
Feature
Set start value, I>>
• At definite-time characteristic
Start time, typical
Time/current characteristic
• Definite time operate time, t>
Resetting time, typical/maximum
Retardation time
Drop-off/pick-up ratio, typical
Operate time accuracy at definite-time
characteristic
Operation accuracy
Table 23. Definite-time undercurrent (loss-of-load) protection (I<)
Feature
Set start value, I<
• At definite-time characteristic
Start time, typical
Time/current characteristic
• Definite time operate time, t<
Resetting time, typical/maximum
Drop-off/pick-up ratio, typical
Inhibitation of I<
Operate time accuracy at
• Definite-time characteristic
Operation accuracy
Value
0.50...20.0 x I
n
50 ms
0.05...30.0 s
40/50 ms
30 ms
0.96
±2% of the set operate time or ±25 ms
±3% of the set start value
Value
30...80% I
n
300 ms
2...600 s
300/350 ms
1.1
<12% I
n
±3% of the set operate time or 100 ms
±3% of the set start value or +0.5% I
1MRS756304 C
Issued: 30.10.2009
n
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