Answer / rupinder singh

2nd and 5th harmonics means- voltages or current having frequency two times and five times the fundamental power frequency..eg. if fundamental power freq. is 50Hz then 2nd Harmonics is a current or voltage having frequency 100Hz and that fifth Harmonic having frequency 250Hz.

Why synchronous motor runs at a fixed speed? what is the name of that fixed speed?

4 Answers  

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what will happen if secondary of potential transformer (220kv/110volt) of any metering core or protection core (cables) of any phase got earthed??

1 Answers  

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How to design harmonic filter at the project stage without nowing the harmonics levels

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mccb service sittings be done?

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What is the Difference Between MCCB & ACB & VCB

3 Answers  

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How many companies are manufacturing 33 KV HT Breaker

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why transformer capacity is called KVA and motor capacity is called HP/KW? Why transformer capacity cant call HP/KVA?

5 Answers  

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I Have 3 Phase 10 KW AC Alternator i found one phase weak, so what will be the reason & what action shouls i take to rectify the same.

0 Answers   Vadilal,

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if we going for high voltage usages what are the considering factors, why those factors are effected.... please give me an answer related motor factors like wnidnig, frame, temp etc

1 Answers   ABB,

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what will happen if instead of neutral we use earth wire as return conductor?if we can use ,then why we are not using in our day to day appliances?please justify the answer

11 Answers   NTPC, ONGC,

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why substation rating interms of 11 multiples???like 11kv/33kv iis there any special reason???

5 Answers  

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Which theory is used in the analysis of salient pole rotor synchronous machines? Who is credited for this developement? Could the same theory be used for cylindrical rotor synchronous machines?

1 Answers  

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