ABB REF 545 Product Guide

Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
32
Current unbalance protection for shunt capacitor banks, CUB1Cap, dI>C (51NC-1)
Operation mode
Alarm mode
Start current of the tripping stage
Operate time of the tripping stage in DT mode
Time multiplier k for the tripping stage in
IDMT mode
Start current of the alarm stage
Operate time of the alarm stage
Disallowed number of faulty elements
Level of natural unbalance compensation
Recording of the natural unbalance phasor
Location of capacitor fuses
Not in use; Definite time; Extremely inv.; Very inv.;
Normal inv.; Long-time inv.; RI-type inv.; RD-type inv.
Normal mode; Element counter
1.0...100.0%dIn
1.0...300 s
0.05...2.0
1.0...100.0%dIn
1.0...300 s
1...100
0.0...20.0%dIn
Do not activate; Activate
External; Internal
Faulty elements counter
Amount of faulty elements in branch 1 of
phase IL1
Amount of faulty elements in branch 2 of
phase IL1
Amount of faulty elements in branch 1 of
phase IL2
Amount of faulty elements in branch 2 of
phase IL2
Amount of faulty elements in branch 1 of
phase IL3
Amount of faulty elements in branch 2 of
phase IL3
0...100
0...100
0...100
0...100
0...100
0...100
Operation accuracies
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy at definite-time mode
Operate time accuracy at inverse-time mode
Note! The values below apply when f/f
n
=0.95...1.05
2.5% of set value + 0.001 x dI
n
Phase angle measurement: 2
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)
Typ. 0.95
< 45 ms
2% of set value or 20 ms
Class index E = 5.0 or 20 ms

ABB REF 545 Specifications

General

Brand	ABB
Model	REF 545
Category	Touch terminals
Language	English