why the excitation is necessary to produce the reactive power

2 Answers  

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How can make a star delta with Rstar delta feeder ( ( 4contactor & one timer ) pls answer with digram (power &control digram)

1 Answers  

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Why we does earthing for transformer neutral point

5 Answers   amps, DLF,

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I need to compare the energy consumption of an industrial machine before and after improving. Shall I compare the apparent power or the active power? I know usually factories use compensated capacitors (or other similar components) to compensate the reactive power, so if I use the apparent power, it's not the real power consumed.

2 Answers  

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What will be the diameter of pipe between conservation tank and transformer

0 Answers   JLL,

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what is the effect when the shunt field winding is opened in dc shunt motor (i) at the time of starting ? (ii) in running condition ?

4 Answers  

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Why usually in all electrical equipment taking more current in Y pahse like pumps,compressor,or any other applications

1 Answers  

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if the syncronous machine run at leading pf and as its field curret increased its armature current decreased is machine operate as generator or motor?

1 Answers  

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A 11 KV motor is working. if the supplay is fail. what will happened with it's breaker? Trip / remain the same condition?

4 Answers  

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Explain the laying procedure and laying depth of submarine/subsea power cable for 220/400KV system? Also available cable diameter?

0 Answers   ABB,

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Why transformer called by KVA?

8 Answers   Reliance,

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In CTs tan delta point should be earthed , what is the reason behind it?

0 Answers  

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