ABB REF 542plus Technical Reference Manual

50/51 Overcurrent with
free
programmable
characteristic (8
thresholds
available)
Is = 0.050 – 40.000 x In
t (def) = 0.015 – 300.000 s
A = 0.005 – 200.000
P = 0.005 – 3.000
B = 0.000 – 50.000 s
Td = 0.050 – 5.000
Tr = 0.020 – 100.000 s
67 Overcurrent
directional high
I>> = 0.050 ... 40.000 In
t = 40 ... 30 000 ms
Direction = backward, forward
67 Overcurrent
directional low
I> = 0.05 ... 40.00 In
t = 40 ... 30 000 ms
Direction = backward, forward
67 Overcurrent
directional with
free
programmable
characteristic (8
thresholds
available)
Is = 0.050 – 40.000 x In
t (def) = 0.040 – 300.000 s
A = 0.005 – 200.000
P = 0.005 – 3.000
B = 0.000 – 50.000 s
Td = 0.050 – 5.000
Tr = 0.020 – 100.000 s
Direction = backward, forward
Earth Fault (1)
51N Earth fault high Io>> = 0.050 ... 40.000 In
t = 40 ... 30 000 ms
51N Earth fault low Io> = 0.050 ... 40.000 In
t = 40 ... 30 000 ms
51N IDMT Earth fault IDMT
(inverse definite
minimum time)
Curve type = standard, very, extremely, or long time
inverse time characteristic
Ieb = 0.050 ... 40.000 In
K = 0.050 ... 1.500
50N/51N Earth-fault with
free
programmable
characteristic (8
thresholds
available)
Is = 0.050 – 40.000 x In
t (def) = 0.015 – 300.000 s
A = 0.005 – 200.000
P = 0.005 – 3.000
B = 0.000 – 50.000 s
Td = 0.050 – 5.000
Tr = 0.020 – 100.000 s
Direction = forward, backward
Net type = isolated (sin φ
), earthed (cos φ)
67N Earth fault
directional high
Io>> = 0.050 ... 40.000
t = 40 ... 30 000 ms
Uo> = 0.02 ... 0.70 Un
direction = forward, backward
net type = isolated (sin phi), earthed (cos phi)
67N Earth fault
directional low
Io> = 0.050 ... 40.000 In
t = 40 ... 30 000 ms
Uo> = 0.02 ... 0.70 Un
direction = forward, backward
net type = isolated (sin phi), earthed (cos phi)
67S Earth fault
directional
sensitive
Io> = 0.050 ... 2.000 In
t = 100 ... 10 000 ms
Angle alpha = 0.0 ... 20.0°
Angle delta = -180.0 ... +180.0°
Uo> = 0.05 ... 0.70 Un
40
REF 542plusREF 542plus
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
1MRS755859

ABB REF 542plus Specifications

General

Brand	ABB
Model	REF 542plus
Category	Control Unit
Language	English