9424200994 Rev N 579
* Recognition time = 2 cycles for 0.57 > pickup, 4 cycles for 0.24 > pickup, 8 cycles for 0.08 > pickup, 16
cycles at pickup
O/U/ROC Voltage Inhibit
Setting Range ........................................................... 15 to 250 V
Accuracy.................................................................... ±2% or ±1 V, whichever is greater
87 - Phase Current Differential Protection (Optional)
Restrained Differential
5 Ampere CT Pickup Accuracy ................................. ±5% or ±75 mA, whichever is greater
1 Ampere CT Pickup Accuracy ................................. ±5% or ±25 mA, whichever is greater
Response Time ......................................................... <2 cycles at 5 times pickup
<3 cycles at 1.5 times pickup
TAP
5 Ampere CT Setting Range ..................................... 2.00 to 20.0 A
1 Ampere CT Setting Range ..................................... 0.40 to 4.00 A
Minimum Restraint Pickup (I
op
)
Setting Range ........................................................... 0.1 to 1.00 per unit
2
nd
Slope Pickup (I
res
)
Setting Range ........................................................... 0.1 to 20.0 per unit
Restraint Slope 1
Setting Range ........................................................... 5 to 100%
Restraint Slope 2
Setting Range ........................................................... 15 to 140%
Time Delay
Setting Range ........................................................... 0 to 60,000 ms
Accuracy.................................................................... ±1% or ±1 cycle, whichever is greater, plus trip time
for instantaneous response (0.0 setting)*
* Trip Time for 0.0 Delay Setting .............................. 1¼ cycles maximum for currents ≥ 5 times the pickup
setting. 1¾ cycles maximum for a current of 2
times pickup. Two cycles maximum for a current
of 1.05 times the pickup setting.
87N - Neutral Current Differential Protection
Iop Minimum Pickup
5 Ampere CT
Setting Range ........................................................... 0.1 to 5 A
Accuracy.................................................................... ±5% or ±75 mA, whichever is greater
1 Ampere CT
Setting Range ........................................................... 0.02 to 1 A
Accuracy.................................................................... ±3% or ±15 mA, whichever
Overcorrection Coefficient
Setting Range ........................................................... 1 to 1.3
BE1-11g Specifications - 25 Hz Operation
(818 strony)
(82 strony)
(754 strony)
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