Element 49; Element 46 - ABB REF610 Technical Reference Manual

1MRS755535
Feeder Protection Relay
Technical Reference Manual - ANSI Version
Feature
time dial, 51N TD ANSI
Resetting time, maximum
Retardation time, typical
Set resetting time, 51N RSET 0.05...2.50 s
Drop-off/pick-up ratio, typical 0.96
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
*
at RD-type characteristic
*
(RXIDG)
Operation accuracy
1.0...10.0% I (CT)
*
n
10.0...100% I
*
n
100...800% I (CT)
*
n
a)
In REF610 revision A and B, the setting value 40% I
greater than 40% I . In revision C (or later), the full setting range is used for the IDMT calculation.
n
b)
Resetting time of the trip signal.
Table 5.1.4.11.-3

Element 49

Feature
Set full load current, FLA
Set alarm level, 49 ALARM
Trip level, 49 Trip
Time constant, τ
Operate time accuracy
I/FLA >1.2
Table 5.1.4.11.-4

Element 46

Feature
Set pickup value, 46
at definite-time characteristic
Pickup time, typical
Time/current characteristics
definite time
operate time, 46 TDLY s
Resetting time, maximum
Drop-off/pick-up ratio, typical
Operate time accuracy
at definite-time characteristic
*
Element 51N
1...15
b)
50 ms
30 ms
±2% of the set operate time or
±25 ms
5 or ±25 ms
±7% of the calculated operate
time or ±25 ms
±7% of the calculated operate
time or ±25 ms
±7% of the calculated operate
time or ±25 ms
±5% of the set pickup value +
0.05% I (CT)
n
±3% of the set pickup value
is used for the IDMT calculation, if the set value is
n
Value
0.30...1.50 x I
50...100%
100 %
1...200 min
±2% of the set operate time or ±1 s
Value
10...100%
100 ms
1...300 s
70 ms
0.90
±2% of the set operate time or ±100 ms
REF610 REF610
Element 50N
50 ms
30 ms
0.96
±2% of the set operate time or
±25 ms
±5% of the set pickup value +
0.05% I (CT)
n
±3% of the set pickup value
±3% of the set pickup value
(CT)
n
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