Basler Electric BE1-11t - Manual (Page 459)

9424200995 Rev H 447
51 - Inverse Overcurrent Protection
Pickup
5 Ampere CT Setting Range ..................................... 0.5 to 16 A
1 Ampere CT Setting Range ..................................... 0.1 to 3.2 A
SEF Setting Range ................................................... 0.01 to 0.8 A
Unbalanced Setting Range ....................................... 2 to 100%
Dropout ..................................................................... 93 to 99% of the actual pickup value
3Phase, IA, IB, IC, IG Accuracy
5 Ampere CT ............................................................. ±2% or ±50 mA, whichever is greater
1 Ampere CT ............................................................. ±2% or ±10 mA, whichever is greater
SEF ...........................................................................
±(2.5% + 2.5 mA)
3I0, I1, I2 Accuracy
5 Ampere CT .............................................................
±3% or ±75 mA, whichever is greater
1 Ampere CT .............................................................
±3% or ±15 mA, whichever is greater
Unbalanced Accuracy
5 Ampere CT ............................................................. ±2% of pickup setting
1 Ampere CT .............................................................
±2% of pickup setting
Time Current Characteristic Curves
Timing Accuracy (All 51 Functions) ..........................
±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.
Refer to the
Time Curve Characteristics chapter
for information on available timing curves.
Voltage Restraint
Control/Restraint Range ............................................ 30 to 250 V
Accuracy....................................................................
±2% or ±1 V, whichever is greater
51TF - Transformer Monitor
Base Current
Pickup
5 Ampere CT Setting Range ..................................... 0.5 to 16 A
1 Ampere CT Setting Range ..................................... 0.1 to 3.2 A
Alarm Count
Setting Range ........................................................... 1 to 99
Thresholds
Setting Range ........................................................... 1 to 40 A
Accuracy
5 Ampere CT .............................................................
±2% or ±0.05 A, whichever is greater
1 Ampere CT .............................................................
±2% or ±0.01 A, whichever is greater
N Constants
Setting Range ........................................................... 0.5 to 3
K Constants
Setting Range ........................................................... 1 to 3,000
BE1-11t Specifications