Answer / aman kumar

Basically mcb /mccb work on electromagnetic induction so if dc voltage supply in it then tripping coil in mcb/mccb does not produce magnetic field and so not trip. so it was not work in short circuit condition
On other hand if overload current is high then bimetallic strip in mcb/mccb expand and disconnected the circuit.

why voltage drop if we have connected 230 v ac suplly through diode to bulbe we found haft ie 110 voltage drop why it is

4 Answers  

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please, Send me last technical test question paper in my email id..

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what is draiv work

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how to select battery for 15 KVA UPS with formula

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What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)

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The advantage of free wheeling diode in a Full Ware rectifier is -reduces the harmonics -Supplies the voltage at negative vlotage

4 Answers   GNFC,

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21. What is the purpose of taking Capacitance and Tan Delta Test in Transformer bushing? 22. What are the protections to be used for Generator? 23. Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0 24. What happens when the polarity changes in CT? Explain briefly? 25. Explain the Term in CT Name Plate – Class: 5P10

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What will be the fault current of any system when its generation is 10% of BASE generation( FUll Load )?Will is 10% or the same as full base calculation?

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generator(Deutz 550kv)is runing for 2 hours with load of 900 amp and then it goes in shutdown with alarm fault messege of speed fault although heirtz reading fixed at 50,what does that mean

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For backup batteries connection,which method is best? series or parallel ?  

3 Answers   ABC,

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what is the applicatyons of the slipring motor and please tel me more about the slipring concept

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How can we checked Killo Watts of Motor & Alternator?

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