What are the layers of protection over armoured cables?

3 Answers   Accenture, IOCL,

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What are the types of piano switches?

0 Answers  

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In a three-phase full converter, output voltage pulsates at frequency of a. f b. 2f c. 3f d. 6f

2 Answers  

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which capacity of RCCB used for five thousand watt electricity load?

0 Answers  

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is 60hz freq better than 50 hz?&why?

1 Answers  

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gd eve frndz my qstn is how convert sound energy to electrical energy

1 Answers   HCL,

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Grounding. Dear all at one of my site we checked the amps at the earthing cable to the alternator it was found 125 to 130 A. at the neutal cable in same machine found 146A. in the same plant checked the earthing current on other alternator it was 52A, and neutral 116 A. we are facing problems with our controller and the card was damaged once. can that neutral/GND current be a reason? as there is common grounding for the Alternator,Brkr panel,Transformer?

2 Answers  

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HOW GENERATING END VOLTAGE LEVEL (6.6 KV/ 10.5 KV/ 11 KV/ 13.5 KV) DECIDED IN POWER PLANT. ON WHAT FACTORS THE GENERATING END VOLTAGE DECIDED, & WHAT IS THE CALCULATION USED FOR THIS.

3 Answers   Areva, Cognizant,

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how tubelight circuit is connected and how it works?

7 Answers   Punj Lloyd Ltd,

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on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf  has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure? 

2 Answers  

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show that power dissipated by a pure inductor exited by a sinusoidal voltage source v = vm sin wt is zero

1 Answers  

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What is principal to reduce earth leakage current with isolation transformer? When isolation transformer is installed in input stage of system, earth leakage current is reduced. the reason is why the leakage current of 2nd stage of isolation transformer does not affect the 1st stage's leakage current. I would like to know the reason. As you know, earth leakage current is a kind of AC. So, How to reduce earth leakage current in case that isolation transformer is used?

2 Answers  

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