Answer / shahbaz shaikh

it is the ratio of active power to appearent power it is
denoted by cos phi
it is used to find the power ,and othe rcalculation

Answer / ghulammohyhuddin

what is power factor

apparent lode and actual lode is power factor

why is it so important

this is very impotent because control mager demand

that min is if your lode is govt 100amp approval if is
goning to 120 whan to start motor or etc will be amp high
for a second . this will be meter record in meter
electrical company . so power factor work is leed or lage
in this mater . whan lode is going up capastor is working
sablish the voltage and crrent not gonig up ,

in 132 kv transformer , in which range of transformer oil bdv required ? if it has around 50-55 , then how it was insulated the winding ?

3 Answers   Voltamp,

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why we change the direction of winding in rotor ?how we make the north and south pole?

0 Answers  

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hi pal, i am vengatesh from tamilnadu(chidambaram),i have called for the written test for the post of jr executive(ELECTRICAL) of AAI ,I dont know about the question paper pattern,so any kindly help me to face the examination,post me the model question papers and some tips to write my examination to (vengi.annadurai@gmail.com)

0 Answers  

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

0 Answers  

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how much distance is required for earth pit to earth pit in substation???

3 Answers   Divis Laboratories,

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what is stalling of a motor?

2 Answers   BTCL,

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How the main bus bar rating of 400kV switchyard with one and half breaker scheme is calculated.

2 Answers  

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which IS or IEC is used for earthing,breakdown voltage of transformer oil, hv/pd testing and all type of electrical testing

0 Answers  

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why anti pumping relay is not given to tripping coil of the breaker? why only to closing coil?

2 Answers   INEL, Siemens,

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Application wise, where we should use AC motors and where we should DC motors?

1 Answers   Nespak,

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how to find motor contactor rating and bimetalic relay rating? of 30kw motor which will operate on star-delta starter?

6 Answers   HCC, L&T,

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Your B.tech marks is being given in CGPA grade. How is it calculated?

1 Answers  

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