Why the pointer of earthing of 3 pin top is made thick and long compared to the phase and neutral pin ?

3 Answers   Sanima Hydro Power,

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why the undervoltage relay's interlock is used in earthswitch closing operation of the 400kV line scheme?

2 Answers  

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give 5 differences between relay and contactor

1 Answers   Texas,

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Fot testing new star-delta 132 kw motor in electrical worshop.we should check in star or delta connection as we do not have higher capacity cable in worshop?

4 Answers   Adani,

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In Power transformer oil temperature or winding temperature will be high

3 Answers  

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What is the difference between hot and cold loop testing?

0 Answers  

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in a live circuit with a light bulb such that the bulb is off by a switch, is the light glows if the switch 2 terminals are both touched by a mouse?

1 Answers  

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In stepdown transformer 11/415 volt two nos.(R & Y)HT side fuse is blown ,what will be voltage of ry,rb,yb in secondary side

5 Answers   NTPC,

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Why the power factor of the alternator in power plant is kept .8 lagging. Can't we maintain it at 1.

3 Answers  

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how to calculate the power loss of cable?

1 Answers  

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase), before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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How to size a transformer which will supply power to 550kW,690V motor starting with VFD?

1 Answers  

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