What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

0 Answers  

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where AVR is connected in power plant.

7 Answers   ABB, Saudi Red Bricks,

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why in large rating C.T.s equipotential wires are used?

2 Answers   Essar,

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I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.

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why the earth pin is thicker than other pins in a plug? If it is for reducing resistance, then why the copper earth wire is not so thick as earth pin of socket?

5 Answers   Omax,

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Just a silly question but just to make my curious mind bac to normal - Why was not 67 and 67N relays built into a single relay as i have noticed that the R,Y,B CT wiring end up into the 67 relay while the common of the R,Y,B CT wiring end up into the 67N relay. Then it was better if a single relay was manufactured just like the distance relay (21). Another question i would like to ask is - how do we know where the 67 and 67 N relay has to be placed.why is it not placed at the transformer bay? In the substaion that i am working -i have noticed that it is placed between a breaker and a common double bus bar and this line bay is connected to another substation at a remote place which is furthur connected to a load. B U S______CT for 67 & 67N ______Breaker _____ remot s/s. B A R

1 Answers  

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Why are transmission lines multiples of 11? Is it because of some historic reason ? Or is there a scientific base to it?

5 Answers  

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What is the power factor of a transformer at no load?

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1) Can anyone give me a typical value for Insulation Resistance of 11kV xlpe cable? 2) How much will the IR value decrease per KM of cable length added?

1 Answers  

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what is diff between Ground/Earth & Neutral?

4 Answers  

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what is the difference between droop mode and ischnorous mode in thermal powerplant?

0 Answers   GVK, Thermax,

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What is the function of a pressure Switch in a Substation?

2 Answers  

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