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

How can find thermal state value in relay for calculate thermal overload.

1963

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Why we use mho Relay in long transmission line?

1500

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what is the difference between surge protection capacitor and surge arrestor

2377

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How many types of losses occur in a transformer?

1210

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How many types of instrument cables are there?

1130

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Is it possible to measure the voltage of a battery from a single terminal?

1789

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how to revers the direction of single phase motor

1007

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what is the role and fuction of automatic transfer switch in rotary ups

1993

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Can we indroduce the principle of single phase induction mator to Transformer? i.e. by Producing rotating flux in the transformer.

2367

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How to calculate wire length,size & current? ( related to control panel)

2221

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please send me RRB electrical engineer previous year questions for Sr. Section Engineer

2007

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What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

1796

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what is negative and zero impedance in 3 phase induction motor ??

2231

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How much weight an electrical engine can pull??

2150

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What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )

2121

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