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ACB is mainly used at LT sides for the protection of whole distribution system for the desired area supply it trips at the moment of over load or any internal short ckt in the breaker.where as MCCB is advanced version of MCB which is used for particular equipment or some groups of single phase load which trips only due to over load current.

if we convert kva into Ampers,which one formula use by us,pls tell me?

7 Answers   ABB,

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Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only.

12 Answers   ACC, JLL, ZETDC,

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arcing is due to only capacitance or it is due to both inductance and capacitance? explanation.

2 Answers  

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why the Current transformers secodary is shorted to ground (In metering and Protection)

2 Answers  

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HOW MUCH CURRENT CAN CARRY A 50 kvar DELTA CAPACITOR BANK?

2 Answers  

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what is reluctance?

11 Answers   TCS,

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WHAT WILL HAPPEN WHEN THE MOTOR FREQUENCY INCREASED OVER THE RATED MOTOR RPM THROUGH DRIVE?

3 Answers  

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Simultaneous trip of incoming and outgoing breakers of 400kv/220kv trnasformer. What are the probable causes?

2 Answers  

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Why Cables are always circular and not square or rectangular?

3 Answers  

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What is expention fastener (Fan)

0 Answers  

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Why not LED burn after showing alarm,as Alarm volt is 11- 13,But LED is of3 volt,why it isnt Burn??

1 Answers  

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if the transformer at full load have a iron loss =900w and copper loss = 1600w . what percent of the load will the transformer has a maximum efficiency?

3 Answers  

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