Answer / natha

pf leading or lagging both are undesired.practice generally is to maintain near unity pf which means full utilization of power generated.
If a purely resistive load is connected to a power supply, current and voltage will change polarity in step, the power factor will be unity (1), and the electrical energy flows in a single direction across the network in each cycle. Inductive loads such as transformers and motors (any type of wound coil) consume reactive power with current waveform lagging the voltage. Capacitive loads such as capacitor banks or buried cable generate reactive power with current phase leading the voltage. Both types of loads will absorb energy during part of the AC cycle, which is stored in the device's magnetic or electric field, only to return this energy back to the source during the rest of the cycle.

Answer / devendra verma

No disadvantage

How many energy meters can be connected on a 15VA Voltage transformer. please send a calculation sheet.

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Do you know how to maintain a generator, if so what are those maintenances?

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How to set an overload in a motor?

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hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.

0 Answers   Bhel, CVL,

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can we use breather in a SEALED power or distribution transfomer instead of injecting nitrogen.

1 Answers  

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can any one provide some material?

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What is partial discharge in power cable?

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What is the difference between power,voltage,current? and with example

3 Answers  

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