ABB RELION REF610, Technical Reference Manual

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71
Feature Element 51N Element 50N
time dial, 51N TD ANSI 1...15
Resetting time, maximum 50 ms
b)
50 ms
Retardation time, typical 30 ms 30 ms
Set resetting time, 51N RSET 0.05...2.50 s
Drop-off/pick-up ratio, typical 0.96 0.96
Operate time accuracy
*
at definite-time
characteristic ±2% of the set operate time or
±25 ms ±2% of the set operate time or
±25 ms
*
at IDMT characteristic
according to IEC 60255-3:
accuracy class index E 5 or ±25 ms
*
at IDMT characteristic
according to IEEE C37.112 ±7% of the calculated operate
time or ±25 ms
*
at RI-type characteristic ±7% of the calculated operate
time or ±25 ms
*
at RD-type characteristic
(RXIDG) ±7% of the calculated operate
time or ±25 ms
Operation accuracy
*
1.0...10.0% I
n
(CT) ±5% of the set pickup value +
0.05% I
n
(CT)
±5% of the set pickup value +
0.05% I
n
(CT)
*
10.0...100% I
n
±3% of the set pickup value ±3% of the set pickup value
*
100...800% I
n
(CT) ±3% of the set pickup value
a)
In REF610 revision A and B, the setting value 40% I
n
is used for the IDMT calculation, if the set value is
greater than 40% I
n
. In revision C (or later), the full setting range is used for the IDMT calculation.
b)
Resetting time of the trip signal.
Table 5.1.4.11.-3 Element 49
Feature Value
Set full load current, FLA 0.30...1.50 x I
n
(CT)
Set alarm level, 49 ALARM 50...100%
Trip level, 49 Trip 100 %
Time constant,
τ
1...200 min
Operate time accuracy
I/FLA >1.2 ±2% of the set operate time or ±1 s
Table 5.1.4.11.-4 Element 46
Feature Value
Set pickup value, 46
at definite-time characteristic 10...100%
Pickup time, typical 100 ms
Time/current characteristics
definite time
operate time, 46 TDLY s 1...300 s
Resetting time, maximum 70 ms
Drop-off/pick-up ratio, typical 0.90
Operate time accuracy
*
at definite-time characteristic ±2% of the set operate time or ±100 ms
Feeder Protection Relay
Technical Reference Manual - ANSI Version
REF610 REF610
1MRS755535