Answer / sandma

To convert ac into dc,then store it in the batteries.when a fault occurs relays are act on only in dc,and for lightining purpose in the substation.BATTERIES are heart of the substation.

Answer / jithendra adusumilli

all the controls (VCB's & protections relay) will be on DC

When the AC supply is off then for identification of the VCB's & control will very easy it means heart of the Control

Answer / n.prabakar

DC supply only for breaker control because ,if plant came to blockout we cant resume even EB suppy without breaker close.

Answer / azhakesh

In all industries sub station contain DC pannel to run the total plant with DC for the constant power supply and avoid the fluctuvation.

AC voltage only create magnetic flux in coils, but in Solenoid coil how 24V DC volt create flux and pick the plunger

5 Answers  

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In india, according to trade theory above 5 HP motor reqired star delta starter. But we R connect 11 KV motor with 14MW in Direct to line ( With VCB starter combination) Can U Guess, How it is possible ?????

0 Answers   Equate,

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How much current in 100 kva Transformer HT & LT side

1 Answers  

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how to check the insulation for motor using megger?

2 Answers   GSK,

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why the motor is rated as kw& transformer as kva

7 Answers   Areva,

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When distance between two pulleys is not fixed, the tension of belt is adjusted by a) driver shaft b) driven shaft c) adjustment screw d) belt

0 Answers   BMRCL,

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What the main causes of transient interruptions on Over-Head Distribution Lines?

0 Answers   Orion Laboratories,

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What is the form name of 'c' license, I want to download in web

0 Answers   BMM, Ceebros Hotels,

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dear all, can any body explain that how to select an induction motor for a specific mechanical load(inertia). is there any formula or calculation then please give me. i shell be very thankful to all of you. Thank,s and Rgard,s.

1 Answers  

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What is the difference between KW & KVA ?

9 Answers  

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how to set the transformer differential relay

1 Answers   Divis Laboratories,

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how to decide cable rating? send me cable size,ampere rating data

2 Answers   Bhel,

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