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.

while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position

1 Answers  

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What happens to voltage when current is zero?

0 Answers  

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In IDMT RELAY the term minimum (M) indicates what?

7 Answers  

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Shunt reactor is used in EHV Transmission line for..............?

2 Answers   NTPC,

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standard earthing rating for power line..

0 Answers  

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what questions will be asked for 11/33KV licence interview APSEB hyderabad. Can any one share question and answers.

0 Answers  

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what is the relation between Sq mm of wire and its current carrying capacity?

5 Answers   Finolex,

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explain with diagram how to protect transformers and substations from over current with help of CT's?

0 Answers   BARC,

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what is the safe meggar values for motor, transformer HT, LT and Cables?

12 Answers   IOCL, Jindal, TATA,

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what is the design factor that affects the size of a motor ?

3 Answers   Reliance, SGI,

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I am B.E.electrical engineer having 7 years of experience in Transformer testing upto 315 MVA.I want to khow how I can get the 'Electrical Valuer' License.

0 Answers  

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How to check maintenance free battery 12V,26AH using analog multimeter

1 Answers  

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