Answer Posted / vittal

generating station main aim is to meet the load which can
be met completlely by the mechanical units or the source of
the prime over ,which must be mention in kw.
where as the rotationg ac machines are rated in kva
because of the losses ie the iron and copper (not on pf)
mention in kva

but even the pf is also mention on the alternator which
means the generator should be operated on that load

ex: if rating of the plant is 100 then if alternator of 0.8
pf is selected the rating of the generator must be 125

we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

1544

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What are the material used for inductance coil?

693

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which type of cabel

1921

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1519

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Explain the fundamental difference between emf (electro motive force) and pd (potential difference) ?

638

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What happened when capacitor connect series in ac circuit?

968

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We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.

1603

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Define load factor?

640

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what is the working principle of a DG Set, Alternator, & exiter

9746

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1710

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which protection function should measure RMS value of current&DFT value of current?

1470

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if we install two earth pits with a clear space of 5m without any interconnection,by checking the digital multimeter will it show continuity between earth pits? If so what would be the approx. value

1469

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What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

1454

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Difference between rating factor of cable and derating factor of cable?

1186

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what will happen if i connect 12 volt battery with 24 volt battery charger.

1461

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