Answer Posted / suresh

MCB - Miniature Circuit breaker, is having overload and
s.c. protection & used in domestic application

MCCB - Moulded case Circuit breaker, is having overload and
s.c. protection & used in Industrial application & Having
high s.c. capacity

RCCB : Residual current operated circuit breaker, is used
for protection against electric shock

ELCB : Earth leakage circuit breaker & is same as RCCB

MPCB : Motor protection circuit breaker, is used for
protection of motor, having s.c. and overload protection
more effective to protect motor

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along with technical test papers

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in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain

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1111

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why -48 volts dc used in telecommucation

2545

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The moisture in air will condense at

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How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

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what is doubling factor in making current of a breaker?

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hi , i have 150 kw loud and we need 50 m cabil,i want to know wich size cabil we use. thanks

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