how we can decide that what value of ht line will come to any commercial building? (ans except According to the building load)

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We have given to 3phase supply to ups system & how can coming netural

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how to select rating of HT Panel

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how to calculate busbar size? if ex:1000amps i need to calculate busbar size and what size of bar?if any example caculation pls give the formulas.

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how to apply b license to c license in tneb

0 Answers   Billroth Hospitals,

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why we somewhere use ryb phase sequance, somewhere use uvw, and somewhere abc??

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What is the difference between diesel generator engine with and without turbo charger with the same capacity?

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How silicon gel sucks moisture in the transformer, its have any small exaust fan behind silicon gel.

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How to calculate & connection of 900KVA generator 2 sets & load(1500A)? How to choose cable size and ACB size for this load & generator? please explain me detail. Regards, Mr.Han

3 Answers   Powermec, TATA,

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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

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string efficient is 100% what is the voltage across the each disk?

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How npn and pnp transistor works

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