ABB REF 545 Product Guide

Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
34
1) These functions are only supported in the feeder termi-
nal revisions of Release 2.0 or later.
2) This function is only supported in the feeder terminal
revisions of Release 3.5 or later
Phase discontinuity protection, CUB3Low, Iub> (46)
Start unbalance
Operate time
Operation mode
10.0…95.0%
1.0…300.0 s
Not in use
Definite time
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 ±1% unit
internal time < 95 ms
total time < 100 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 current drops below start value: < 50 ms
±2% of set value or ±50 ms
Fuse failure supervision, FuseFail, FUSEF (60)
Ratio U2/U1> 10...50%
Ratio I2/I1< 10...50%
Operation accuracy When f/fn = 0.98...1.02
±2.0 percentage units (of settings Ratio U2/U1> and Ratio I2/I1<)
When f/fn = 0.95...1.05
±4.0 percentage units (of settings Ratio U2/U1> and Ratio I2/I1<)
BSOUT activation time (when the
task interval is 10 ms)
Injected negative-sequence voltage = 2.00 x Ratio U2/U1>
(f/fn=0.98...1.02: < 35 ms (within the same task)
Reset time 20 ms (within the same task)
Reset ratio for Ratio U2/U1>: 0.8...0.96
for Ratio I2/I1<: 1.04...1.2
Fault locator, FLOC (21FL)
The fault locator function for radial distribution systems. Short-circuit localization in all kinds of distribution
networks. Earth fault localizations in effectively earthed networks and in low reactance/low resistance
earthed networks.
Fault localization accuracy ±2.5% of the line length.
Actual fault localization accuracy depends on the fault and the
power system characteristics as described in the FLOC function
block manual, section “Result validity indicator for earth faults”.
Table 7: Power quality functions
Function ANSI
device no.
IEC
symbol
Description
PQCU3H
1)
PQ 3Inf PQ 3Inf Current waveform distortion measurement
PQVO3H
1)
PQ 3Unf PQ 3Unf Voltage waveform distortion measurement
PQVO3Sd
2)
PQ 3U<> PQ 3U<> Short duration voltage variations

ABB REF 545 Specifications

General

Brand	ABB
Model	REF 545
Category	Touch terminals
Language	English