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SKM3 Series Moulded Case Circuit Breaker

SKM3 Series Moulded Case Circuit Breaker - Moulded Case Circuit Breakers - Circuit Breaker

Application:
SKM3 series mould case circuit breaker,it is suitable for the circuit of AC50Hz(or 60Hz),rated insulation voltage 690V rated operating voltage under AC660V,250V(DC),rated operating current 10A-800A.It is for distribute energy of electricity and infrequent making circuit in normal conditions.The MCCB rated current under 400A.They are provided with the function of the protection against overload and short circuit,and undervoltage.The MCCB complies with standard of IEC947-2.

Tripping Characteristics:

Rated current of release(A) Thermodynamic release(ambient temp+40) Operation current of magnetic release(A)
1.05ln(cold state)
inoperative time(h)
1.30ln(heat state)
inoperative time(h)
ln63  1 1 10-50ln20%
63ln250 2 2 10ln20%
250ln800 2 2 5-10ln20%

Rated current of release(A) Thermodynamic release(ambient temp+40) Operation current of magnetic release(A)
1.0ln(cold state)
inoperative time(h)
1.20ln(heat state)
inoperative time(h)
1.50ln(heat state)
inoperative time(h)
1.0ln(heat state)
inoperative time(h)
12.5ln400 2 2 4min 2STp10S 12ln20%

Technical Specification:
Type Rated current
(A)
Pole No. Rated insulating voltage
(V)
Rated operating voltage Arcing over distance (mm) Ultimate short circuit breaking capacity(kA) Services short circuit breaking capacity(kA) Operation performance
(Endurance)
Overall dimensions
AC380V
(400)
AC660V
(690)
DC250 AC380V
(400)
AC660V
(690)
Load Unload L W
3P/4P
H
SKM3-125E 12.5
16
20
25
32
40
50
63
80
100
125
2
3
4
660 380
660
>30 15 - - 7.5 - 3000 7000 120 76/101 70
SKM3-125S 25 - 20 16 -
SKM3-160S 16
20
25
32
40
50
63
80
100
125
160
0 35 8 20 18 - 4000 6000 120 90/120 70
SKM3-160H 50 10 40 25 -
SKM3-250S 100
125
160
180
200
225
250
35 10 40 18 - 2000 6000 170 105/140 103.5
SKM3-250M 50 16 40 30 -
SKM3-250H 65 18 40 48 -
SKM3-400S 200
225
250
315
350
400
35 16 40 18 - 1000 4000 254 140/184 103.5
SKM3-400M 50 20 40 30 -
SKM3-400H 65 25 40 48 -
SKM3-630S 400
500
630
50 20 40 30 - 1000 4000 268 210/280 103.5
SKM3-630M 65 25 40 48 -
SKM3-630H 80 30 40 60 -
SKM3-800S 500
630
700
800
50 20 40 30 - 1000 4000 268 210/280 103.5
SKM3-800M 65 25 40 48 -
SKM3-800H 80 30 40 60 -