Answer / y.vidya sagar

Yes, we can use autotransformer connection or tappings on
one phase to get the reduced voltage in one particular
phase while all the other phases give the same magnitude of
voltage as before to the load. As the tapping is varied we
can get the variable voltage.

Answer / aamod tripathi

YES BY USING A SINGLE PHASE TRANSFORMER

whenever any squirrel or a crow falls on the transformer input line then there is a big explosion and 440 volts of power is being discharged through the neutral line due to which appliances in off mode are also burned.we have earthing for the transformer as well as the bus bar chamber.why is it happening?

1 Answers  

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How magnetic balance test of single phase transformer is done,Especially in ESP transformer rectifier set.

2 Answers   Bhel,

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what is method for testing CT

0 Answers   DCM,

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What is an 86-P or an 86-A trip

0 Answers  

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how rated the neutral voltage of transformer and reactor, e.g. 400/220, 200MVA transformer have neutral voltage of 33kv. and reactor voltage 145kv. how this rating decided?

1 Answers   MEIL,

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What is a doble test

1 Answers   KPSC Karnataka Public Service Corporation,

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

0 Answers  

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what mean by power factor

2 Answers  

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how a resistor resists to flow the current?how an inductor oppses the sudden change in current?how a capacitor opposes a DC voltage.

0 Answers   Hindustan Unilever Limited,

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What do you mean by cogeneration? What its working principle?

0 Answers  

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how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

0 Answers  

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