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Miniature Circuit Breaker

Short Circuit Protection MCB

1.Application DZ50N-63 high switch-off ability miniature circuit breaker is applicable to a line of AC 50Hz/ 60Hz, rated voltage 23/400V and rated current up to 63A, used for overload and short circuit protection. It can also be used for infrequent line conversion under the normal condition.The......

1.Application

DZ50N-63 high switch-off ability miniature circuit breaker is applicable to a line of AC 50Hz/ 60Hz, rated voltage 23/400V and rated current up to 63A, used for overload and short circuit protection. It can also be used for infrequent line conversion under the normal condition.The breaker is applicable to industrial enterprise, commercially district, high-rise building and dwelling house. It conforms with the standards of IEC60898.


2.Main Technical Parameter

Type

DZ50-63

Pole

1P

2P, 3P, 4P

Rated current (A)

1,2,3,4,6,10,16,20,25,32,40,50,63

Rated voltage(V)

230

400

Type of instantaneous release

B,C,D

Rated short circuit breaking capacity Icn (KA)

10

Life (times)

1-32A

Electric life

8000

Mechanical life

20000

Operation frequency

240 times per hour

40-63A

Electric life

8000

Mechanical life

20000

Operation frequency

120 times per hour


 3.Applicable conducting wire

Rated current(A)

Nominal cross section of wire mm2

1-6A

1

10A

1.5

16,20A

2.5

25A

4

32A

6

40,50A

10

63A

16


 4.The over-current protection property

Ambient Temperature

Initial Status

Test Current

Expected

Result

Expected

Result

Note

30±2˚C

Cold position

1.13In

t≥1h

Non-release

-

Carried out immediately after previous test

1.45In

t<1h

Release

-

Cold position

2.55In

1s<t<60s

(In≤32A)

Release

Current smoothly rises to specified value within 5s

Cold position

2.55In

1s<t<120s

(In>32A)

Release

-5~+40˚C

Cold position

3In

t≥0.1s

Non-release

Type B

Cold position

5In

t<0.1s

Release

Type B

Cold position

5In

t≥0.1s

Non-release

Type C

Cold position

10In

t<0.1s

Release

Type C

Cold position

10In

t≥0.1s

Non-release

Type D

Cold position

20In

t<0.1s

Release

Type D

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