Answer / waseem aslam

Control circuit wiring of substation refers to wiring of protection relays of transformer with the circuit breaker and wiring of over-current/earth-fault protection relay in the CB, including manual tripping operation.

Answer / k.prakashchandra

The control circuit is for opening and closing on command.

How many types of lightings are there

2 Answers   ABB, Met Trade,

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What do you mean by lighting transformer?

0 Answers  

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Define piezo-electric effect?

0 Answers  

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why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?

0 Answers   Government, PSU,

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what is derated current of power cable & what is formule to find derated current?

1 Answers   Thermon,

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Bus-bar is made of which material & name of mostly used material in bas-bar design ?

7 Answers  

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how can we check a fully charged battery?

2 Answers   KSEB,

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line tester lamp working in which voltage?

3 Answers  

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differnce between single acting and double acting solenoid valves

0 Answers  

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what is inductive voltage transformer? what is its application and how it differs from capacitive voltage transformer?

1 Answers   NRSC National Remote Sensing Centre,

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in which direction real power and reactive power flow and why???????

3 Answers  

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if current required for triggering thyristor at -30 degrees(temp) is 80 mA, what is the current required at 60 degrees

1 Answers  

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