What is vaccum currcuit breaker.define with cause and where be use it device?

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I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....

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In 3.5X150 Sq.mm cable what does 150 stand for outer dia or inner dia?

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Why different types of connection in transformers are used? (star/star,star/delta,delta/star,delta/delta)Why we are only taking in consideration of star/delta type transformers? if only star/delta is good in practice where doses other type of transformers are used? Note: i want to know place of using different types of transformers other than Star/delta type with brief description.

1 Answers   Electrical Tech,

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I have 10 amp MCB for my air conditioner of 1.5 ton capacity. When I connect the ac direct it is started running but when connected through stabliser the Mcb Get trip and air conditioner couldn't start.please confirm whether Mcb is required to be upgraded to 20 amp. There is no fault in ac and the stabliser. Please advice the reason of tripping the mcb when connected through the stabliser.

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ELECTRICAL DRIVES: can a motor load system with passive load torque can have equilibrium speed in second quadrant

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To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

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how to set relay setting? and example calculation...

0 Answers   JSW,

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List the time domain specifications.

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what is the differance between HT motors And LT MOTORS.

0 Answers   Empire Vitrum Glass, Sappi,

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is there any phase difference occurs while primary and secondary side mutual induction occurs?

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One watt is equal to how many? we says one watt bulb,means what it consume?

3 Answers  

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