Answer / k,prakashchandra

As the pf is very low, one of the 3 watt meters will show
negative reading

Answer / natchi

In this test, we use two single phase wattmeters or one 3phase wattmeter, during test one of the 1phase wattmeter reads positive value and other one reads negative value of 3 phase power.

but in usage of 3 phase wattmeter gives directly the whole power of 3 phase supply.

What is the difference between earthed and unearthed power cable.

1 Answers  

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How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?

0 Answers   BARC,

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why in india the voltage generate multiply by 11,,,like 220v,440v,11kv,33kv,66kv,220kv,

3 Answers   NTPC, Servotech, Tata Power,

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What is diversity factor.

2 Answers   Cadbury,

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Why did call copper as a electrical conductor?

2 Answers   ABB,

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Define ohm’s law for a.c (alternating current)?

0 Answers  

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What is difference between insulating medium and fault current interruption medium in a switching device.

0 Answers  

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Can we use 1.1x 2 split air-conditioning at a same time in 2kw power loadar

1 Answers  

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diffance between eletrical and eletronics?

3 Answers  

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In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

2 Answers   JSW,

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What is the difference between MCCB,ELCB,RCB & MCB

2 Answers   Bhel, HCL, HPL,

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How to select cable rating for HT/LT Panels

1 Answers   Alstom,

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