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Overload Protection MCB

1.Application DZ49-63 is applicable to a line of AC 50Hz/60Hz, 230V in single pole, 400V in double, three,four poles for protecting overload and short circuit, and rated current up to 63A. It can also beused for infrequent line conversion under the normal condition.The breaker is applicable......

1.Application 

DZ49-63 is applicable to a line of AC 50Hz/60Hz, 230V in single pole, 400V in double, three,four poles for protecting overload and short circuit, and rated current up to 63A. It can also beused for infrequent line conversion under the normal condition.The breaker is applicable tolighting distribution system in industrial enterprise, commercially district, high-rise building anddwelling house. It conforms with the standards of IEC60898.

2.Main Technical Parameter

Type

DZ49-63

Pole

1P


2P, 3P, 4P

Rated current (A)


6,10,16,20,25,32,40,50,63

Rated voltage(V)

230


400

Ambient temperature


-5˚C~+40˚C

Type of instantaneous release

C


D

C

D

Rated short circuit breaking capacity(KA)

1-32A: 6
50-63A: 4


4

1-32A: 6
50-63A: 4

4


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±2oC

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~+40oC

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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