Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?

3 Answers  

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What is the difference between Analogue Addressable Systems and intelligent Addressable Systems

1 Answers  

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how many testing use in power transformer?tell equipment names?

2 Answers   ABB, Electrical,

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How much pf maintan in dg set in 6o% load,when Dg runnig Neutaal Earthing removed what happen.

0 Answers  

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which relay is used for both detection & correction?(there is only one relay)

2 Answers  

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voltage of a ckt is measured by volt meter having an input impedence camparable with the out put impedance of the ckt Eror caused is 1. Gross Error 2. Errors due to lloading effect

2 Answers   GATE,

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please explain me about traction application?

2 Answers  

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GIVE CONDITION FOR MAX EFFICIENCY OF 3-PH TRANSFORMER AND D.C MOTOR

2 Answers   BARC,

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How the over load setting for HT Motors calculated-provided in Numerical Relay

0 Answers   Damodar Valley Corporation,

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Give atleast 20 alternating current apparatus and devices.

0 Answers  

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What is cable tray, its type, and its support?

0 Answers  

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What are the safety devices on Cumins Diesel Generators from 500 kva to 1500 kva.

1 Answers   Maruti Suzuki,

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