what are lightning masts?what is their purpose???

1 Answers   Mecon,

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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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what is resonance in electrical circuit and its effect? where we get high resonance and low resonance?

1 Answers  

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when a airgap of the induction motor gets larger does it draw more current ??? does it power factor gets lower?

3 Answers  

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what is resistance

6 Answers   AITM,

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What is the function of a capacitor in a ceiling fan?

2 Answers  

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what is apparant power and reactive power

2 Answers  

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Why induction motor is widely used in industry

0 Answers   BARC, Honda,

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how is working the APFC when varying the load?

1 Answers  

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what is the function of commutator in dc motor?

3 Answers  

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why we are using DC supply for all protection relays, why cant we use AC supply..???

1 Answers  

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why earthing point in the 6amps/16amps socket bigger than the remaining (Phase & Neutral)points.

1 Answers  

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