when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

4 Answers  

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i have 2 motor of same rating. on no load condition one motor take 1.6A but other motor is taking 4.8A. what is the reason of this. please explain with proof.

8 Answers   Ambuja, UltraTech,

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ceiling fan wattages rating

1 Answers  

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What are the protection used for alternator,transformers.

2 Answers   Adani,

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Working of microwave oven?

0 Answers   LG,

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What device is use for metering current at lt consumer end..??

2 Answers   Power Grid,

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what is the reason for balance of voltage in magnetic balance test?

2 Answers   Reliance,

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how we can calcultae the short circuit level for bus bar

0 Answers   Jaiprakash, Panorama Apparels,

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which of the following motors is non-self starting?

3 Answers   SS Solutions,

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why we are using large cross section cable at load side and small at other (11kv to trsfr)side of transformer? when the load increses current at both side increases,right?

2 Answers  

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is it possible to convert electrical energy to light energy for transmission purposes?

7 Answers  

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Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?

1 Answers  

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