ABB REF 541 Product Manual page 31

Feeder Terminal
Start-up supervision for motors, MotStart, I
Start current (for motor)
Start time (for motor)
Time-based restart inhibit limit
Countdown rate of the time counter
Stalling time permitted for rotor
Operation mode
Start counter (Read-only parameter)
Time to restart enable (Read-only parameter)
Stall input (signal for motor stalling indication;
read-only parameter)
Operation accuracy
Start time
Reset ratio, typically
Retardation time
Three-phase overload protection for shunt capacitor banks, OL3Cap, 3I>3I< (51C)
Operate times of the overload stage Ib>
I/Ib> t [s]
1.15 1799
1.20 299
1.30 58
1.40 13.5
1.70 0.9
2.00 0.29
2.20 0.1
Note! The minimum operate time is 100 ms
Start current of trip stage
Time multiplier k for trip stage
Start current of alarm stage
Operate time of alarm stage
Start current of undercurrent stage
Operate time of undercurrent stage
Setting of reconnection inhibit time t
Operation accuracies
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy at definite time mode
(alarm stage I >, undercurrent stage I<)
a
Operate time accuracy at inverse time mode
(trip stage I >)
b
REF 541, REF 543, REF 545.
2
t n< (48)
s
1.0...10.0 x In
0.3...250.0 s
1.0...500.0 s
2.0...250.0 s/h
2.0...120.0 s
Not in use
2
I t
2
I t & Stall
0...99999
0...99999 min
Not active
Active
f/fn = 0.95...1.05: ±2.5% of set value or ±0.01 x In
f/fn = 0.95...1.50:
internal time < 22 ms
total time < 30 ms
f/fn = 0.50...0.95:
internal time < 32 ms
total time < 40 ms
0.95
< 50 ms
Standard durations [s]
1800
300
60
15
1
0.3
0.12
0.30...1.50 x In
0.05...2.0
0.80...1.20 x Ib
0.5...6000.0 s
0.10...0.70 x Ib
0.1...120 s
0.5...6000 s
rec
Note! The values below apply when f/f
2.5% of set value or 0.01 x I
Injected currents = 2.0 x start current
internal time < 32 ms
total time < 40 ms
40...1000 ms (depends on the minimum pulse width set
for the TRIP output)
Overload stages: Typ. 0.95
Undercurrent stage: Typ. 1.05
Total retardation time when the current exceeds the
start value: < 50 ms
2% of set value or 20 ms
Depends on the frequency of the current measured:
10% of theoretical value or 40 ms
1MRS750443-MBG
Standard
IEC 60871-1
IEC 60871-1
ANSI/IEEE 37.99, IEC
60871-1
ANSI/IEEE 37.99
ANSI/IEEE 37.99
ANSI/IEEE 37.99
ANSI/IEEE 37.99
=0.95...1.05
n
n
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