Answer / abhishek goyal

In CB mostly we have both option AC/DC SUPPLY because of
that we can use diode in circuit.
for spring charge motor we can feed both AC/DC supply (its a
Universal motor)

Answer / girish

In VCB spring charging motor will be a DC one, but control
supply is taken from 230 AC, same will be fed to Diode
bridge and then the rectified 110 Volts DC is fed to the
spring charging motor

What is the suitable rating of MCB for 1.5 Ton A.C and why? 1Ton= how many amperes?

5 Answers   BARC,

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what will happen to the core losses if we perform the open ckt test on high voltage side of a transformer ?

2 Answers  

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Can the same motor be operated in both direction ?

12 Answers  

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the current which flows during lightening is ac or dc,,,,,,,,,,, WHY

6 Answers  

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What are the characteristics of negative feedback?

0 Answers  

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why is only master neutral contactor is made to switch in synchronization of dg sets

4 Answers   Honeywell,

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IF 5000amp current on LT 440V. then how much it will draw amp on HT 11KV side

10 Answers  

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what is the funda of earthing? Explain breifly about earthing?

5 Answers   IOCL,

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What is the function of probe in cro?

0 Answers  

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Why the suply frequency in INDIA is 50HZ

2 Answers   HCL,

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Whata are the types of Cables?

0 Answers  

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Why material of brush is carbon in motors why not other material.

5 Answers   NTPC,

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