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SDKW1L Residual-Current Circuit Breaker


SDKW1L residual-current circuit breaker is used for distribution networks with frequency 50Hz, rated voltage AC400V and rated current 800A and below. It can protect human bodies against indirect contact and avoid fire disasters if insulation destruction brings about earthing fault current. It can distribute electric energy, protect circuits, and keep electrical power units from overload and shot circuit. It takes the role of infrequent turn-on and turn-off and infrequent motor start-up. Rated residual operating current I△n and maximum breaking time can be adjusted on site according to actual conditions. If residual current occurs, we can customize a function of alarming, but no tripping.
 
This series of breaker conforms to standards of IEC60947-2 and GB14048.2.

Product introduction



Technical parameters:
Model
SDKW1L-100
SDKW1L-225
SDKW1L-400
SDKW1L-630, 800
Frame Size Rated Current (Inm)(A)
100
225
400
630, 800
Rated Current (In)(A)
10, 16, 20, 25, 32
100, 125, 140, 160
225, 315
400, 500, 630
40, 50, 63, 80, 100
180, 200, 225
350, 400
700, 800
Number of Poles
2
3
4
2
3
4
3
4
3
4
Rated Insulation Voltage (Ui)(V)
AC800
Rated Working Voltage (Ue)(V)
AC400
Rated Impulse Withstand Voltage (Uimp)(V)
8000
Flashover Distance
50
100
Breaking Capacity Level
L
M
H
L
M
H
L
M
H
L
M
H
Ultimate Short Circuit Breaking Capacity
(Icu)(kA)
30
50
85
30
50
85
50
65
100
50
65
100
Service Short Circuit Breaking Capacity
(Ics)(kA)
15
35
50
15
35
50
35
42
65
35
42
65
Rated Residual Short Circuit Making (Breaking) Capacity
8.75
12.5
21
8.75
12.5
21
12.5
13.5
25
12.5
13.5
25
Rated Residual Operating Current (I△n)(mA)
No delay
30/100/500, 100/300/500
30/100/500, 100/300/500
100/300/500
300/500/1000
Delay
100/300/500
100/300/500
100/300/500
300/500/1000
Rated Residual Non-operating Current
 (I△n)(mA)
1/21△n
1/21△n
1/21△n
1/21△n
Operating Performance (Number of Times)
Switch on
1500
1000
1000
1000
Switch off
8500
7000
4000
4000
Total
10000
80000
5000
5000
Residual Current Operating Time of Protection
I△n
2I△n
5I△n
10I△n
Maximum Breaking Time (S)
No delay
0.2
0.1
0.04
0.04
Delay
0.5/1.15/2.15
0.35/1/2
0.25/0.9/1.9
0.25/0.9/1.9

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