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 542plus
REF 542plus
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
1MRS755859