how to calculate lux level in out door (yard lighting) please expalin with a example

1 Answers   IVRCL,

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if we use contactor & MCCB both in a feeder.in this feeder rating of contactor is higher or lower or same of MCCB rating & why?

1 Answers  

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how can H.V busbar in a powerstation can be protected?

1 Answers   Unitech,

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difference between over current and over load protection?

5 Answers   BARC,

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If load current is 70amps or 50amps what range of CT to install for ampere metering

3 Answers  

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How to calculate the Airconditioner capacity for a standard telecom BTS shelter?

3 Answers  

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how to determine the cable size...pls explain me with the formula taking particular load....does the factors like impedance & short circuit rating influence the cable size, if so how....

0 Answers  

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can you any one give exact mathematical relation between AC current and DC current?

0 Answers  

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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's difference between a400amps lt contactor and a400amps lt circuit breaker

3 Answers   Indian Railways,

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how to find out speed of single phase motor

6 Answers   BARC,

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what is spill current?

4 Answers   Adani, NPCIL,

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