How many types of electrical earthing are there?

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What id difference between power and energy?

0 Answers  

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In a 3 phase,400v,4 wire system, 2 incandescent lamps, one having 230v,100w and the other 230v,200w are connected between r phase- neutral and y phase-neutral respectively. If neutral wire breaks which lamp will fuse first and why?

3 Answers   Eskom, SSC,

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when a three phase motor in running condition consumes 2A in each phase,and if one of the phase gets fails what will be the consumption in other two phases

4 Answers  

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How to clear BHEL written test exam.....anyone having experience pls refer me the link were i can get BHEL question papers....

1 Answers   Bhel,

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what are the stresses in circuit breakers ?

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What is the function of capacitor in electrical circuits?

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how sensors are working?

1 Answers   Amazon,

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How do you find HT and LT sides of a distribution transformer only by looking at it from outside?

1 Answers   Nespak,

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how to calculate the current carrying capacity of a 25 & 16 kva distribution transformer.

2 Answers  

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What is the power factor of an alternator at no load?

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1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

0 Answers  

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