GE Multilin G650, Руководство пользователя, Страница: 39 / 639

2-10 G650 Generator Protection & Control System GEK-113285A
2.4 TECHNICAL SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
2.4.1.6 NEUTRAL INSTANTANEOUS OVERCURRENT (50N)
2.4.1.7 SENSITIVE GROUND INSTANTANEOUS OVERCURRENT (50SG)
2.4.1.8 NEGATIVE SEQUENCE TIME OVERCURRENT (51-2)
Current Input Fundamental Phasor (without harmonics)
Pickup level 0.05 to 160.00 A in steps of 0.01 A
Dropout level 97% to 98% of the pickup level
Level Accuracy
Values at nominal frequency:
±
0.5% of the reading
±
10 mA from 0.05 to 10 A
±
1.5% of the reading for higher values
Overreach < 2%
Trip delay 0.00 to 900.00 s. in steps of 0.01 s.
Reset delay 0.00 to 900.00 s. in steps of 0.01 s.
Operate time <50 ms at 3 x Pickup at 50 Hz, typically
Timing accuracy at 0 ms time delay (no intentional delay): 50ms
at non-zero time delay:
±
3% of operate time or 50 ms
(whichever is greater)
Snapshot Events Selectable by setting
Current Input Phasor (without harmonics) or RMS
Rated current For connection to 1 or 5 A CTs.
Pickup level 0.005 to 16.000 A in steps of 0.001 A
Dropout level 97% to 98% of the pickup level
Level Accuracy
Values at nominal frequency:
±
1.5% of the reading
±
1 mA from 0.005 to 16 A
Overreach < 2%
Trip delay 0.00 to 900.00 s. in steps of 0.01 s.
Reset delay 0.00 to 900.00 s. in steps of 0.01 s.
Operate time <50 ms at 3 x Pickup at 50 Hz, typically
Timing accuracy at 0 ms time delay (no intentional delay): 50ms
at non-zero time delay:
±
3% of operate time or 50 ms
(whichever is greater)
Snapshot Events Selectable by setting
Current Input Fundamental Phasor (without harmonics)
Pickup level 0.05 to 160.0 A in steps of 0.01 A
Dropout level 97% to 98% of the pickup level
Level Accuracy
Values at nominal frequency:
±
0.5% of the reading
±
10 mA from 0.05 to 10 A
±
1.5% of the reading for higher values