11.Technical Data On Protection Functions - ABB REF 610 Technical Reference Manual

REF 610
4.1.4.11.
58
Feeder Protection Relay
Technical Reference Manual
Technical data on protection functions
Table 4.1.4.11-1 Stages I>, I>> and I>>>
Feature
Set start value, I>, I>> and I>>>
• at definite-time characteristic
• at IDMT characteristic
Start time, typical
Time/current characteristic
• definite-time
operate time, t>, t>> and t>>>
• IDMT according to IEC 60255-3
time multiplier, k
• Special type of IDMT
characteristic
time multiplier, k
• IDMT according to
IEEE C37.112
time dial, n
Resetting time, maximum
Retardation time, typical
Set resetting time, t
r
Drop-off/pick-up ratio, typical
Operate time accuracy
• at definite-time characteristic
• at IDMT characteristic
according to IEC 60255-3:
accuracy class index E
• at IDMT characteristic
according to IEEE C37.112
• at RI-type characteristic
Operation accuracy
• 0.3...0.5 x I
n
• 0.5...5.0 x I
n
• 5.0...35.0 x I
n
1)
At IDMT characteristic, the relay allows settings above 2.5 x I
>2.5 x I as equal to 2.5 x I
n n
2)
Resetting time of the trip signal.
Stage I>
0.30...5.00 x I
n
1)
0.30...2.50 x I
n
55 ms
0.05...300 s
Extremely inverse
Very inverse
Normal inverse
Long-time inverse
0.05...1.00
RI-type inverse
0.05...1.00
Extremely inverse
Very inverse
Moderately
inverse
1...15
2)
50 ms
30 ms
0.05...2.50 s
0.96
±2% of the set
operate time or
±25 ms
5
±7% of the
calculated operate
time
±7% of the
calculated operate
time
±5% of the set
start value or
0.05% I
n
±3% of the set
start value
.
1MRS 755310
Stage I>> Stage I>>>
0.50...35.0 x I 0.50...35.0 x I
n
30 ms 30 ms
0.04...300 s 0.04...300 s
50 ms 50 ms
30 ms 30 ms
0.96 0.96
±2% of the set ±2% of the set
operate time or operate time or
±25 ms ±25 ms
±3% of the set ±3% of the set
start value start value
±3% of the set ±3% of the set
start value start value
for stage I>, but regards any setting
n
n