ABB REX 521 Technical Reference Manual, Standard Configurations page 80

REX 521
80
Protection Relay
Technical Reference Manual, Standard Configurations
3I>
CBFP
BACTRL START
BS1
TRIP
BS2 CBFP
GROUP
RESET
)LJ  )XQFWLRQ EORFN V\PEROV RI ,!-> DQG ,!!->
Three-phase directional overcurrent protection, low-set stage, 3I>->
Start current
Operate time
Operation mode
Time multiplier
Basic angle ϕ
b
Oper. Direction
Earth fault pr.
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy in DT mode
3I>>
CBFP
BACTRL
BSOUT
BS1
START
BS2
TRIP
GROUP
CBFP
DOUBLE
RESET
0.05...40.00 x In
0.05...300.00 s
Not in use
Definite time
Extremely inv
Very inverse
Normal inverse
Long-time inv.
RI-type inverse
RD-type inverse
0.05...1.00
0...90
Forward
Reverse
Disabled
Enabled
Mode1 (Phase-to-phase voltages/Peak-to-peak currents)
Mode2 (Phase-to-phase voltages/Fund. freq. Currents)
Mode3 (Phase-to-earth voltages/Peak-to-peak currents)
Mode4 (Phase-to-earth voltages/Fund. freq. Currents)
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
Current:
0.1...10 x In: ±2.5% of set value or ±0.01 x In
10...40 x In: ±5.0% of set value
Voltage:
±2.5% of measured value or ±0.01 x Un
Phase angle: ±2°
Injected currents > 2.0 x start current:
internal time < 42 ms
total time < 50 ms
40...1000 ms (depends on the minimum pulse width set
for the trip output)
0.95
< 45 ms
±2% of set value or ±20 ms
1MRS 751802-MUM