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what is the preventing maintenance of transformer

1 Answers  

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why does a dc machine has high efficiency while working as a generator than as a motor

1 Answers  

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what work will do diffrential realay DG set

0 Answers   IG Petrochemicals Ltd,

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actual rated capacity of a disc insulator??

5 Answers   OPTCL,

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What's the difference between non break power supply and non break non short break power supply

0 Answers  

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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

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what is acceptable leakage current for 33kv cable while doing high voltage test for cable? how to calaulate the leakage current for 33kv or any rated cable?

0 Answers  

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What is the purpose of Rotor earth fault relay and How to test the Rotor earth fault relay in generators and What is the procedure?.

1 Answers  

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what isthe emf eqation of a transformer

7 Answers  

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if u give d.c. supply to transformer primary then what happen.&why??????????????

4 Answers   DCS, DRDO, HCL,

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How a generator is positioned in a hydroelectric power plant?

10 Answers   Infosys,

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Which are the major Nuclear power accidents in the world?

1 Answers  

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