Answer / Anup Kumar Lahariya

A Star Delta starter is commonly used with an induction motor because it provides a smooth start, reducing the stress on the motor and extending its lifespan. At startup, the motor's current can be up to six times higher than its full-load current, which could cause excessive heat buildup and mechanical strain. The star delta starter starts the motor in a lower-current star configuration and switches to a higher-current delta configuration once the motor has reached its normal speed.nThe advantage of using a Star Delta starter is that it allows for a gradual increase in current, reducing the shock to the motor. This results in less wear and tear, increased efficiency, and improved overall performance.

Is HT capacitor rating connected directly to motor terminals , related to motor no load current?

0 Answers  

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Will a load of 15A work if we connect it between one phase and earth?

4 Answers  

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Can any body tell me the different types of LT cables & their application.

1 Answers  

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why chock were used in old tubelights but are not newest tubelights?

1 Answers  

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condider as 100 w lamps glowing . for completing a one unit how much time it should glow

3 Answers   Avalon,

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1600 KVA ka transformer hi aghar lt side par 800A aur voltage 420 ho to HT side ki cable ki rating keya ho gi?

1 Answers  

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When measuring the Insulation resistance of a motor winding (winding to earth) using a megger meter, Applied voltage(1000V) was automatically reduced to 500V. and the measured insulation resistance values are also very low (in Kohm range) Can anyone give me a reason???

3 Answers  

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What is RCBO? hw it works

2 Answers  

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Do closed loop systems require manual input?

1 Answers   GE,

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Can be ammeter and voltmeter used without CT? if not, what is the reason for that?

3 Answers   Elektrotek, Toyo Engineering,

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

6 Answers  

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Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 Answers  

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