Answer / gopal agarwal

SURGE arresters are used for arresting i.e. controling
lightining surgs which are accured during clouding.these
lightining surges are of very high voltage ranges such as
many times greater than the rating of equipments ,which will
damage them and hence these are used at both sides end of
electrical equipments for protection.

what are the main hormonics in ac?

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Can we use the ceiling fan regulator to run drill machine having 2000 watt power consumption?

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is power factor correction related with vector group of transformer i.e:Dyn11?

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what is power factor?

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what is negative d.c. voltage, why this voltage is used in base transciever station.

0 Answers   Vintage Air,

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Is there possible to Test Transformer for Overfluxing Capability. Or is there any firm who does Overfluxing Test on Transformer?

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In 3 phase induction motor even with low Voltage it reaches nearly it's rated speed why? (for example instead of 400V it reaches with 250V)

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Why ferranti effect occurred in leading p.f load?

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Does frequency change with increasing voltage i.e 220v to 11kv? explain if not?

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Discuss the effect of sudden loading of an induction motor

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Is a induction motor rotate by back emf ? If not , then how it is rotate ?

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Please send 110 kv sb station full single line drawing(sld)

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