Answer Posted / dinesh

buckholzs relays

Why derating factor os applied on Cables?

1917

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What are the applications of autotransformers?

1042

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Can we use shunt trip coil instead of trip coil with protection relay for protection?

1709

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Is it possible to implement Restricted Earth Fault protection for a transformer without neutral CT?

4282

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What is difference between SMC supportg and Glass Fibre Reinforced Plastic Support.

2305

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How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4733

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I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

1709

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what is the basic need of domestic loads 1- voltage 2- current

2069

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What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?

1978

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Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?

2497

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What is the mmf,rgt and ngt please brief completely

1597

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I COMPLITED MY B.TECH AND 10TH CLASS WITH 70%MARKS BUT 12TH CLASS 55%MARKS..CAN I GET INDIAN RAILWAY RECUREMENT EXAMINATION?

2153

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how give earthing conection to household equipment?

1990

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3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??

1370

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What is deference between MCB & MCCB & ISOLATOR

2072

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