How To Calculate Cable Size By Kw. May 22. 2010 · high voltage current cable size calculation. Let’s we calculate required cable sizing for 5.5kw/7.5hp motor which is operated at 415v. 0.86pf.
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How to calculate cable sizes when the total load is 18 kw but it is divided into 6 towers each at a distance of 1 km and each tower has a load of 3 kw .with 3 towers on one side and 3 towers on the other side . and placing one feeder pillar between them (i.e. Pf = 0.8. efficiency = 94%. So in the case of ht motor. cable short circuit current capability solely is sufficient to finalize the cable size. as the other two parameters will be adjusted automatically.
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3 towers on one side then feeder pillar and then 3 towers on other side). which will feed them supply .this feeder. The fourth step in cable sizing calculation is to determine the minimum size of the cable for short circuit conditions.
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Pf = 0.8. efficiency = 94%. May 22. 2010 · high voltage current cable size calculation.
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Size of cable for branch circuit which has single motor connection is 125% of motor full load current capacity. In load factor. at first calculation of cable size(load factor)=19/23=0.82 but. after we change the cable size with higher size. why the load factor use in calculation still 0.82. isn’t that (load factor)=19/28?
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How to calculate cable sizes when the total load is 18 kw but it is divided into 6 towers each at a distance of 1 km and each tower has a load of 3 kw .with 3 towers on one side and 3 towers on the other side . and placing one feeder pillar between them (i.e. Hence the cable rating formula can be written as. cable size = 1.5 x full load current.
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The thickness of the wire is proportional to the ampere rating. Pf = 0.8. efficiency = 94%.
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In both bs and iec calculations. the kw calculation is based on a power factor of 0.8. The current rating of the motor is used to calculate cable size.
Every Cable Is Unique In Its Appearance. Utility And Even Performance.
Use the following formula for voltage drop calculation. Cable length = 100 m. Pf = 0.8. efficiency = 94%.
The Cable Size Is Equal To The 1.5 Times Of The Full Load Current Of The Motor/Load.
Load current = p / (1.732 x v x pf x eff) — (p = √3 x vx i cosφ = for three phase circuits) = 125000 / (1.732 x 415 x 0.8 x 0.94) ~ 230 a. Pf = 0.8. efficiency = 94%. The correct measuring of cables is essential to guarantee that the cable can:
Kw (Load) Cu Cable Size In Mm2 Current Rating(A) Mcb Rating(A) 0.5 Kw:
3 towers on one side then feeder pillar and then 3 towers on other side). which will feed them supply .this feeder. Cable size calculation of 90 kw lt motor. Operating current (a). 125% current per nec (a). “zero length” cable size. acceptable.
In Load Factor. At First Calculation Of Cable Size(Load Factor)=19/23=0.82 But. After We Change The Cable Size With Higher Size. Why The Load Factor Use In Calculation Still 0.82. Isn’t That (Load Factor)=19/28?
My requirment is 11kv and load of 6mw. with short circuit current rating of 31.5ka. i… P = v x i cos φ for 1 phase load Thickness of the cable is directly proportional to the ampere rating.
Your Cable Requirements Are Also Unique.
Min capacity of cable= (7×125%) =8.75 amp. The thickness of the wire is proportional to the ampere rating. Formula is. i=load (in kw)/ (sqrt (3)*v (in kv)*p.f) (a) the current obtained has to derated since the cable is designed to operate at a defined temperature.