Answer / m raviteja

depends upon the rating of a motor or feeder. for LT the
current capacity of power cables for AL is 1.5 times of
cable size and copper is 2.5 times.

Answer / guest

feeder rating plus 1.5multiple tollerance

what is the use of power factor ? where its applicable ?

4 Answers  

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1. what is the power factor and whatis his losses 2. what is the working procedure of 51RNB AND 87 relay

3 Answers   ABB,

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How can determine cable size with respect to cable length and area in mm2

1 Answers  

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which is chemical used as in ro water what is difference betweeen multi grade filter&dual media filter

0 Answers   Dalkia,

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in transmission line, if the load is suddenly increased at the receiving end of the system the phase shift will (a)decrease (b)becomems zero (c)increase (d)not be affected

4 Answers   Getco,

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transformers? power factor? machiences?

3 Answers  

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what is power factor ?

3 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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Genreally distribution transformers are having Star/delta connections to provide phase and neutral to the consumers. Is the neutral of the star conncted secondary grounded in these transformers?

1 Answers  

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how is the cable tray designed & how its total length is calculated for an Industrial plant Say for Ex. (500KW Motor Load)

0 Answers  

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How 3 phase invertor works?

0 Answers   Aero Ltd,

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What are the two basic types of transformers?

0 Answers  

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