Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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What would be the steps and parameters in case if a fault occurs in transmission line at a distance far from the generating station?

0 Answers  

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What is meant by rating error prevention in breaker??

1 Answers   L&T,

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can any one help me out by posting something related to rvnl interview for site engineer electrical.? what is the procedure? what kinda question they ask us? how long the interview goes? and any tips? and any thing you want to share?

1 Answers   RVNL,

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ratings of lightning arrester

0 Answers   Bajaj,

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The iron loss in a 100kva transformer is 1 kw and full load copper losses are 2 kw, then what is maximum efficiency occure at a load?

3 Answers   MPSC,

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wat is mean by HRC fuse... WHY we choose it...?

3 Answers  

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what is different between DIGITAL and ANALOG?

3 Answers  

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how to carried out tan delta test in 11 KV alternator ?

0 Answers  

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define transformer

1 Answers  

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why the Parameters : Base Voltage & Maximum Voltage can't be equal in value in a VFD (Variable Frequency Drive) ? How much the base voltage would be lower than the maximum voltage ? If 400 V is the 3 phase output of a VFD ... then what should be the base voltage ? thanks a lot

1 Answers   Yaskawa,

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What is the difference between Contactor and Circuit breaker ?

8 Answers  

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