Answer Posted / mukesh

For motor we need to use 3 cores, only a single core is
enough for earthing.And 1.5sqmm single core cable is enough
for earthing of 0.75 kW motor and double earth is
requirements for whereas 3 phases is used as per rule.

While testing a ZCT what parameters have to check or measure?

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1. transformer design formula ? 2. how to calculate the primary turns and secondry turns ? 3. core types ? 4. how to find the primary current and secondry current ? 5. how to calculate the stacking factor ? 6. range of fulx density ?

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i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

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What is a signal flow graph?

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What do you mean by dependent and independent voltage sources?

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what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

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What happen if we apply square wave or traiangular waveform voltage to the transformer primary winding instead of sinusoidal wave?

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what is the purpose of shading ring or shading coil in electrical equipments.

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If UG power cable both ends are to be earthed or what? If not why?

1999

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Where should the lighting arrestor be placed in distribution lines?

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why is the conservator tank painted white on the transformer

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Hi, Next week Iam appearing RRB exam for section engineer. So help me to get modal question papers for this position. Iam very thankful to you. Whether question will be fully techanical format or general form. Please give me a details regarding this exam.

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Is any generator is developed which is operated with out diesal or other expensive source?

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WHAT IS THE WORKING PRINCIPLE OF A GENERATER.how is a GTG (Gas TURBANE Generater) working.plz explane

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The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is

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