ABB REF 541 Product Manual page 25

Feeder Terminal
Directional earth-fault protection, high-set stage, DEF2High, Io>> (67N-2), and instantaneous
stage, DEF2Inst, Io>>> (67N-3)
Start current
Start voltage
Operate time
Operation mode
Operation criteria
Operation direction
Basic angle 
b
Operation characteristic
Intermittent E/F
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
Residual overvoltage protection, low-set stage, ROV1Low, Uo> (59N-1)
Start voltage
Operate time
Operation mode
Measuring mode
Operation accuracy
Start time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
REF 541, REF 543, REF 545.
1.0...500.0% of In
2.0...100.0% of Un
0.1...300.0 s
Not in use
Definite time
Instantaneous
Basic angle & Uo
Basic angle
IoSin/Cos & Uo
IoSin/Cos
Non-directional Io
Non-directional Uo
Forward
Reverse
-9060
IoSin()
IoCos()
Not active
Active
Peak-to-peak
Fundamental frequency
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value + 0.0005 x In
±2.5% of set value or + 0.01 x Un
Phase angle ±2
Injected neutral current > 2.0 x start current
and residual voltage > 2.0 x start voltage:
internal time < 72 ms
total time < 80 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
< 50 ms
±2% of set value or ±20 ms
2.0...100.0% of Un
0.05...300.00 s
Not in use
Definite time
Peak-to-peak
Fundamental frequency
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x Un
Injected voltages >2 x start voltage:
internal time < 32 ms
total time < 40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
Total time for blocking: < 25 ms
Total time when voltage drops below start value: < 50 ms
±2% of set value or ±20 ms
1MRS750443-MBG
25