Answer / achal

Class 2 co-ordination?
As you have not clearly specified we assume it as Insulation Co-ordination hence Class 2 is the protection level (i.e. ability to withstand current capacity).

Answer / surajit mishra

Read the article by "Square D", an Electrical Company in the US. I am giving the link below.
http://static.schneider-electric.us/docs/Motor%20Control/0140PD9202A.pdf

The speed of a dc motor can be controlled by the variation of 1. armature voltage. 2. field current. 3. armature circuit resistance. 4. angle of brush shift. Which of the statements given above are correct? (a) 1,2 and 3 (b) 2,3 and 4 (c) 1,3 and 4 (d) 1,2 and 4

1 Answers  

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A 3 phase transformer's (Y-Y) Y and B phase is (Y and B connection not broken) broken from neutral and R and Nutral connection is ok, what will be the relay tripping and why

0 Answers  

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HOW TO SIZE THE TRANSFORMER OR WHAT ARE THE STEPS INVOLVED IN FINDING THE SIZE OF THE TRANSFORMER FOR GIVEN LOAD SAY 2000KW ?

1 Answers  

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how we calculate the 30 KW 3phase electric motor current on noload

23 Answers   Monnet, Siemens, SSR, Supermac Industries,

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What is Star Delta Connection, where it is applied & what for it is used

4 Answers   Premium Transmission,

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What are your future plans for the company if permanently employed?

0 Answers  

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In vapour absorption refrigeration machine fluids used are

0 Answers   Caterpillar,

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what is the differnce between ac and dc?

5 Answers  

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how we have to calculate the short circuit current for 33/11kv 2mva, 7.5% Z, Transformer primary side breaker and secondary side breaker short circuit current for both sides?.

5 Answers  

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how to calculate the surge level of surge suppressors related to the SF6 cicuit breakers?

0 Answers   Crompton Greaves,

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What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?

0 Answers   Honeywell,

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what is power transformer?

1 Answers  

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