Answer / mandeep kumar

Mcb is used in protection against shortcircuit & Overload
current where Earth MCB is used for leakage current.We may
say leakage current as Residual current.Residual means
difference of two currents.MCB works on the principal of
Cantilever Principal & Electromagnetic Induction .

Answer / avinash

MCB means Miniature Circuit Breaker, because it is a compact circuit breaker for domestic use.

Earth MCB are of two types: ELCB - Earth Leakage Circuit Breaker in which current flowing through the Earth wire trips the CB (Circuit Breaker) to OFF.

The other type is RCCB - Residual Current Circuit Breaker, in which imbalance of currents going in and coming out, causes CB to trip. This is more expensive and more sensitive and more protective of human life. Imbalance of the IN and OUT currents means it is flowing through something else (maybe human body) and must be tripped OFF.

what is the transformer rush current?

0 Answers  

---

how the alternator transfere mechanical energy to electrical one ??

3 Answers  

---

What happens on the secondary of a 33kV/11kV when one phase of the primary fuse blows?

3 Answers  

---

How does a 3 phase induction motor is started?

3 Answers   IOCL,

---

How turns ratio test is done in three phase transformers?

2 Answers  

---

sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

0 Answers   UltraTech,

---

What is the differance between 2 dc motors of armature voltage 660 v and 440 v?

0 Answers   Kirloskar,

---

Why we use cosine angle for calculating power factor not in sine angle ?

4 Answers  

---

what is pf. how to calculate capacitor bank value to maintain unity pf.

18 Answers   JH, Saint Gobain, Supreme Treves,

---

what is the difference single phase and 3phase starter

1 Answers  

---

How to calculate multiplying factor of dc energy meter

0 Answers  

---

Why the wave trap is put in Y phse only in switchyard?why not in other phases?

1 Answers  

---