AIR CIRCUIT BREAKERS
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sigmaelektrik
.com
10
ACB
Current ratings
Range (Ir4)
Error
Current
Actions Time
Time Error
(0.2~0.8)In
+OFF
(OFF Position)
(NA1- 2000,mi-
n160A)
±10%
≤0.9Ir2
Non-tripping
>1.10Ir2
Tripping
Setting time (Tg)
120
240
480
±15%
Returnable time
67.5
135
270
±15%
Single phase earth fault protection technical data:
1000
500
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
Ir4=(0.2
~
0.8)In
xln
t(s)
.05 .06 .08 .1 .2 .3 .4 .5 .6 .8 1 2 3 4 5 6 8 10 20 30
0.4s
0.3s
0.2s
0.1s
0.4s
0.3s
0.2s
0.1s
Earth fault protection characteristic curve
