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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.

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0 Answers   Vizag Steel,

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assume we are put both df/dt and vector surge relay in same bus the df/dt relay setting is +5 hz an -5HZ. we want operat the vector surge relay before the df/dt how i calculate the setting of the vector surge relay.

1 Answers  

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What is the de rating factor of cable? What is the importance of the de rating factor in cable selection?

0 Answers  

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motor is 12.5hp after starting few minets motot get hot? why?

5 Answers  

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where any change in supply line due to the incipient faults in three phase induction motor

2 Answers   ABB,

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What the methode get earth resistance?

2 Answers  

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depending on what we can choose the rate of mccb considering that we know the total load

2 Answers  

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where we use stardelta starter and dol starter

4 Answers   HCL,

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what can i do line to line fault

4 Answers  

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keeping in view of parallel operation which of the 3 phase transformer connection are possible? a)delta-delta to delta-star b) delta-delta to star-delta c) star-star to delta-delta d) delta-star to star-delta

4 Answers   Ecil, Siemens,

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Motor running trough VFD, if voltage reduced speed will be?

4 Answers  

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What is technical difference between ELCB & ELMCB?

3 Answers  

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