ABB REF 541 Product Manual page 22

22
Feeder Terminal
Three-phase directional O/C function, low-set stage, DOC6Low, 3I>(67-1)
Operation mode
Start current
Operate time
Time multiplier
Basic angle 
b
Operation direction
Earth-fault protection
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode
Three-phase directional O/C function, high-set stageDOC6High, I>>(67-2), and instantaneous
stageDOC6Inst, I>>> (67-3)
Operation mode
Start current
Operate time
Basic angle 
b
Operation direction
Earth-fault protection
Non-directional operation (when the direction
cannot be determined)
Measuring mode
Drop-off time of the operate time counter
REF 541, REF 543, REF 545.
Not in use;
Definite time
Extremely inv.;
Very inverse
Normal inverse
Long-time inv.;
RI-type inverse
RD-type inverse
0.05...40.00 x In
0.05...300.00 s
0.05...1.00
0...90
Forward
Reverse
Disabled
Enabled
Phase-to-phase voltages, peak-to-peak measurement
Phase-to-phase voltages, fundamental freq. measurement
Phase-to-earth voltages, peak-to-peak measurement
Phase-to-earth voltages, fundamental freq. measurement
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
0.1...10 x In: ±2.5% of set value or ±0.01 x In
10...40 x In: ±5.0% of set value
±2.5% of measured voltage or ±0.01 x Un
±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
Class index E = 5.0 or ±20 ms
Not in use
Definite time
Instantaneous
0.05...40.00 x In
0.05...300.00 s
0...90
Forward
Reverse
Disabled
Enabled
Disabled
Enabled
Phase-to-phase voltages, peak-to-peak measurement
Phase-to-phase voltages, fundamental freq. measurement
Phase-to-earth voltages, peak-to-peak measurement
Phase-to-earth voltages, fundamental freq. measurement
0...1000 ms
1MRS750443-MBG