50bf breaker failure protection, Pickup, Time delay – Basler Electric BE1-851 User Manual
Page 24: 51 time overcurrent protection, Accuracy (51p, 51n), Accuracy (51q), Time current characteristic curves, 62 logic timers, 79 recloser protection, Automatic setting group characteristics
50BF Breaker Failure Protection
Pickup
Setting Range ................................................................. Fixed at 0.5 A for 5 A unit, 0.1 A for 1 A unit
Accuracy ......................................................................... ±10%
Time Delay
Setting Range ................................................................. 50 to 999 ms
Accuracy ......................................................................... ±5% or ±¼ cycle, whichever is greater
Reset Time ..................................................................... Within 1¼ cycles of the current being removed
51 Time Overcurrent Protection
Pickup
5 Ampere CT Setting Range .......................................... 0.5 to 16 A
1 Ampere CT Setting Range .......................................... 0.1 to 3.2 A
Dropout/Pickup Ratio:
95%
Accuracy (51P, 51N)
5 Ampere CT .................................................................. ±2% or ±50 mA, whichever is greater
1 Ampere CT .................................................................. ±2% or ±10 mA, whichever is greater
Accuracy (51Q)
5 Ampere CT .................................................................. ±3% or ±75 mA, whichever is greater
1 Ampere CT .................................................................. ±3% or ±15 mA, whichever is greater
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 Overcurrent Characteristic
Curves, for information on available timing curves.
62 Logic Timers ∗
Modes ............................................................................. Pickup/Dropout, Integrating, Retriggerable, Non-
Retriggerable, Oscillator, and Latch
Setting Range ................................................................. 0 to 9,999 s
Accuracy ......................................................................... ±5% or ±¾ cycle, whichever is greater
∗
262 and 362 are available when style option 1 is V or W.
79 Recloser Protection
Reclose (791, 792, 793, 794), Reset (79R), Max Cycle (79M), Reclose Fail (79F)
Setting Range ................................................................. 100 ms to 600 s
Accuracy ......................................................................... ±5% or +1.75, −0 cycles, whichever is greater
Automatic Setting Group Characteristics
Number of Setting Groups:
4
Switch Level
Range ............................................................................. 0-150% of the setting group 0, 51 phase pickup
setting (SO-51P)
Accuracy ......................................................................... ±2% or ±50 mA (5 A), ±2% or ±10 mA (1 A)
Switch Timer
Range ............................................................................. Range 0-150% of the setting group 0, 51 phase
pickup setting (SO-51P)
Accuracy ......................................................................... ±5% or ±2 s, whichever is greater
1-8
BE1-851 General Information
9289900990 Rev R