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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from which formula we select a capacitor rating?

4 Answers   Suzlon,

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what happens when the supply frequency to the tube light is reduced to 25Hz....?

5 Answers  

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what is the diff. between power transformer & distribution transformer.....

5 Answers  

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what is the use of Turbocharger in a gen-set?

3 Answers  

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I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

0 Answers  

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Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?

9 Answers  

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What is Isolation Current transformer and what purpose to use it in REF relay ?

1 Answers  

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why there is a 2 slits in three pin's earthing pin?

1 Answers  

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What is the difference between Neutral and Eatrh?

8 Answers  

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As a good company employee, can you report your supervisor to the company management if he or she is going against the company interest in his or her actions?

1 Answers   MAHINDRA,

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our company have 750 kva oil transformer.still we have facing a problem that is when voltage is 11.5 kv coming from HT side then LT-side voltage is 420v or above at tape 1.please give me best solution to decrease the voltage

4 Answers   Gannon Dunkerley,

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