1-10
General Information
BE1-951
Time-Current Characteristic Curves
Timing Accuracy (All 51 Functions):
Within ±5% or ±1½ cycles whichever is greater for
time dial settings greater than 0.1 and multiples of
2 to 40 times the pickup setting but not over 150
A for 5 A CT units or 30 A for 1 A CT units.
See Appendix A, Time-Current Characteristics for
information on available timing curves.
Instantaneous Overcurrent Functions
Current Pickup Accuracy, Phase and Neutral
(50TP, 50TN, 150TP, 150TN):
Dropout/pickup ratio: 95% or higher
5 Ampere CT:
±2% or ±50 mA
1 Ampere CT:
±2% or ±10 mA
Current Pickup Accuracy, Negative Sequence
(50TQ, 150TQ):
Dropout/pickup ratio: 95% or higher
5 Ampere CT:
±3% or ±75 mA
1 Ampere CT:
±3% or ±15 mA
Current Pickup Ranges (50T, 150T):
5 Ampere CT
Range:
0.5 to 150.0 A
Increments:
0.01 from 0.50 to 9.99 A, 0.1 from 10.0 to 99.9 A,
and 1.0 from 100 A to 150 A
1 Ampere CT
Range:
0.1 to 30.0 A
Increments:
0.01 from 0.01 to 9.99 A, 0.1 from 10.0 to 30.0 A
Settable Time Delay Characteristics (50T, 150T):
Definite time for any current exceeding pickup
Time Range:
0.00 to 60.0 seconds
Time Increments:
One millisecond from 0 to 999 milliseconds, 0.1
second from 1.0 to 9.9 seconds, 1 second from 10
to 60 seconds
Timing Accuracy (50TP, 50TN, 150TP, 150TN): ±0.5% or ±½ cycle whichever is greater plus trip
time for instantaneous response (0.0 setting)
Timing Accuracy (50TQ, 150TQ):
±0.5% or ±1 cycle whichever is greater plus trip
time for instantaneous response (0.0 setting)
Trip Time: For 0.0 delay setting:
(50TP, 50TN, 150TP, 150TN):
2¼ cycles maximum for currents
5 times the
pickup setting. Three cycles maximum for a
current of 1.5 times pickup. Four cycles
maximum for a current of 1.05 times the pickup
setting
Trip Time: For 0.0 delay setting:
(50TQ, 150TQ, and 50T/150T):
3¼ cycles maximum for currents
5 times the
pickup setting. 4 cycles maximum for a current of
1.5 times pickup. Five cycles maximum for a
current of 1.05 times the pickup setting
Directional Element(67)
Mode:
Forward, Reverse, Nondirectional
67P Polarization:
Positive Sequence w/Memory
Negative Sequence
67Q Polarization:
Negative Sequence
Содержание BE1-951
Страница 157: ...BESTlogic Programmable Logic BE1 951 7 2 Figure 7 1 BESTlogic Function Blocks Courtesy of NationalSwitchgear com...
Страница 238: ...BE1 951 Human Machine Interface 10 5 Figure 10 5 Metering Menu Branch Structure Courtesy of NationalSwitchgear com...
Страница 239: ...10 6 Human Machine Interface BE1 951 Figure 10 6 Reports Menu Branch Structure Courtesy of NationalSwitchgear com...
Страница 270: ...12 2 Installation BE1 951 Figure 12 1 BE1 951 S1 Case Dimensions Courtesy of NationalSwitchgear com...
Страница 274: ...12 6 Installation BE1 951 Figure 12 5 BE1 951 H1 Case Dimensions Courtesy of NationalSwitchgear com...
Страница 283: ...BE1 951 Installation 12 15 Figure 12 16 Typical AC Connections Courtesy of NationalSwitchgear com...
Страница 394: ...A 18 Appendix BE1 951 Figure A 14 Time Characteristic Curve B Very Inverse 99 1376 Courtesy of NationalSwitchgear com...
Страница 396: ...A 20 Appendix BE1 951 Figure A 16 Time Characteristic Curve G Long Inverse 99 1622 Courtesy of NationalSwitchgear com...
Страница 397: ...BE1 951 Appendix A 21 Figure A 17 46 Time Characteristic Curve Courtesy of NationalSwitchgear com...