Answer / k.prakashchandra

3 ph 4 w energy meter can be used for 1 phase also.

Answer / k.prakashchandra

3 phase meter can measure the energy in the absence of one
phase.

what is two wattmeter test

2 Answers   Jindal,

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We have one Energy meter for Measuring the voltage,current,power,energy(KWH,KVARH,KVAH) & power factor.The problem is that the meter does not show whether the PF is lagging or leading.So i want to know that is there any way or calculation to find out that whether the PF sign (lagging or leading) depending upon the above mentioned parameters?

4 Answers  

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In a power conditoining unit (inverter) of a solar plant when we measure the d.c. current fed by different strings of solar plates to inverter, the current in the negative wire is less almost by 1 ampere to the current in its positive wire say current in positive wire 5 A , then current in negative wire of the same string is 4 A. Since the current entering should be equal to current leaving then why the current is noticably less in negative wire.

0 Answers  

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why we not connect the 12 V batteries in parallel to get the more backup supply for an UPS ? wheter off line or on line UPS ?

2 Answers  

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How can we convert dc to equivalent ac??

4 Answers  

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what is the significance of tan&delta and how it performed in power transformer

0 Answers  

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please send previous exams question papers

0 Answers  

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how does the power is travelled in conductor

2 Answers  

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how we calculate the withstansing current capacity of wires&cables?

0 Answers  

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what is phase to phase fault? what is line to line fault?

2 Answers   Phoenix Technologies,

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what is gas turbine intercooling ?

0 Answers  

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What is the difference between earthing & neutral.

2 Answers  

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