Answer / k.prakashchandra

About 200A

what is cathodic protection and why it use in industries?

0 Answers  

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what is upper impedance and lower impedance of a distance relay

0 Answers  

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what is the d/f b/w dol & star delta starter.

2 Answers  

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An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.

2 Answers  

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without name plate detail of blower how we can find out the HP & Rpm ? the input voltage is 230v single phase

1 Answers  

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how to calculate the size of the HT cable

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what is "pu" in electrical engg.

4 Answers  

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which surface is suitable for NEUTRAL GROUNDING ?

1 Answers   NTPC,

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

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how the fan is switched off immediately switching off the switch?

2 Answers  

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4-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?

3 Answers  

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how to measure winding resistance of single phase motor?

1 Answers   Adani, Dodsal,

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