Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than using a combination of other instruments e.g. voltmeters, ammeters etc?

2 Answers  

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How to calculate the cable size (XLPE)for suitable to 120KW load (if Motor or heaters etc)

4 Answers   SSC,

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What are test signals and their significance?

0 Answers  

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in a live circuit with a light bulb such that the bulb is off by a switch, is the light glows if the switch 2 terminals are both touched by a mouse?

1 Answers  

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what is the difference between earth and unearth cable?

1 Answers   Essar,

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Bimetal strip used in overload relay what is that,which types of material used for that & percentage.

0 Answers  

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tell me the various standerd of CT ratio

1 Answers   ICA,

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What is the general power consumption rating of CPU CRT type and Flat type, Monitor,Printer, projector, Scanner?

0 Answers   HAL,

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What is meant by load angle of an alternator? Upon what factors does the load angle depend?

0 Answers   VECL,

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what is differentila pilot supervision in the incomer control panel in the power station?

0 Answers  

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How to Decide the Location of Earth pit for Compressor in Oil Depo? and How to measure the resistance of earth pit Pls explain me with the help of Circuit Diagram?

0 Answers   Triune,

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what are the things that can cause a three phase motor to crawl?

1 Answers  

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