What is open loop and control loop systems?

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What is the meaning of electricity? How it is being produced? Can we store the electricity? When we produce electricity what is the capacity of voltage current we are getting? If we need 440 volts how to get it? In case, if we want lower than 440 volts how to change it? Please answer?

1 Answers  

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what is the difference between 50 hz freq. and 60 hz freq.? which is better and economic in them ?

0 Answers   Faurecia,

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what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:

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Equal resistance of 100ohm each are connected to the arms of whestons bridge, which is supplied by 2v battery. The galvanometer can sense a current low as 1microAmp. What is the smallest resistance that can be measered.

1 Answers   GATE,

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How can we deside Short Ckt level of electrical System,Breakers etc.please provide formula to find SC of HV side & LV side

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how we do Vector group ,magnetic balance and tap changer test in Transformer?

0 Answers   Afcons, BSL, HPL,

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What are the commonly used schemes for the bus zone protection?

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How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?

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What is sink and source?

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What is the fuction of UV & how it works in circut breakers? is it one type of relay?

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What is a soft start?

4 Answers  

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