Feeder Terminal
REF 541, REF 543, REF 545.
1MRS750443-MBG
25
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
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
Operation accuracy
Start time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
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
Residual overvoltage protection, low-set stage, ROV1Low, Uo> (59N-1)
Start voltage
Operate time
Operation mode
Measuring mode
2.0…100.0% of Un
0.05…300.00 s
Not in use
Definite time
Peak-to-peak
Fundamental frequency
Operation accuracy
Start time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
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
