What is mean A32 B32 C32 D32 in mcb(miniature circuit breaker)

Question Posted / chandu

2 Answers
47503 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

What is mean A32 B32 C32 D32 in mcb(miniature circuit breaker)..

Answer / sudipto jena

hello,this is sudipto,from rourkela
In the above question ,there is a alphabet and then two
digits are present in the code.The digits are for current
carrying capacity. Here the mcb can carry 32 A of ac current
safely.
Now the alphabet stands for the type of mcb, taking
overloading and tripping time of mcb in account.
A for 1.5 to 2 times of overload current and tripping time
about 70 ms
B for 3 to 5 times of overload current and tripping time
about 50-60 ms
C for 5 to 10 times of overload current and tripping time
about 35-45 ms
D for 10 to 15 times of overload current and tripping time
about 20 ms
Generally for residential wiring we use D type for the
purpose of protecting from short ckt fault.

Is This Answer Correct ?

38 Yes

6 No

What is mean A32 B32 C32 D32 in mcb(miniature circuit breaker)..

Answer / manikandan krishnan

First Digit A denotes tripping Curve and second two digits are rating of the breaker..Normally C curve withstand 7-10 time of FLC,D - 10-14 TIMES AND B CURVE is 3.2-4.8 TIMES OF FLC.

Is This Answer Correct ?

12 Yes

4 No

Post New Answer

More Electrical Engineering Interview Questions

what is the switching substation

2 Answers

What is effect of low pf on HT supply.

6 Answers

Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

1 Answers ONGC,

Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any body can explain pls.......

4 Answers

how can we convert 48V dc into 12 V dc? Any standard device for it??

2 Answers

Sparking occur when a load is switched off because the circuit has high – a.) Inductance b.) Capacitance c.) Resistance d.) None

3 Answers Ecil,

I have finish diploma electronics and five years experience in electrical field in ht service how can i get c licensce or other electrical certificate

1 Answers

What is the unit of vaccum?

14 Answers Manhattan,

how sensors are working?

1 Answers Amazon,

explain different losses in a transformer.

1 Answers

Why derating factor os applied on Cables?

1 Answers

what's the outstanding feature of universal motor?

2 Answers Tanfac,

For more Electrical Engineering Interview Questions Click Here