ABB REF 541 Product Manual page 28

28
Feeder Terminal
Three-phase overvoltage protection, low-set stage, OV3Low, 3U> (59-1)
Start voltage
Operate time
Time multiplier
Operation mode
Measuring mode
Operation hysteresis
Operation accuracy
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode,
typically
Three-phase overvoltage protection, high-set stage, OV3High, 3U>> (59-2)
Start voltage
Operate time
Operation mode
Measuring mode
Operation hysteresis
Operation accuracy
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy at DT mode
Three-phase undervoltage protection, low-set stage, UV3Low, 3U< (27-1)
Start voltage
Operate time
Time multiplier
Operation mode
Measuring mode
Operation hysteresis
REF 541, REF 543, REF 545.
0.10...1.60 x Un
0.05...300.00 s
0.05...1.00
Not in use
Definite time
A curve
B curve
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
Note! The values below apply when f/fn = 0.95...1.05
±35 ms
Injected voltages = 1.1 x start voltage:
internal time < 42 ms
total time < 50 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.96 (range0.95...0.99)
< 50 ms
±2% of set value or ±20 ms
±20 ms
0.10...1.60 x Un
0.05...300.00 s
Not in use
Definite time
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value
Injected voltages = 1.1 x start voltage:
internal time < 42 ms
total time < 50 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.96 (range 0.95...0.99)
< 50 ms
±2% of set value or ±20 ms
0.10...1.20 x Un
0.1...300.0 s
0.1...1.0
Not in use
Definite time
C curve
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
1MRS750443-MBG