WHY THE COLOR OF OUTDOOR TRANSFORMER IS BLUE ONLY???

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Why derating factor os applied on Cables?

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How to find Cable size? Caterpillar generator produce (Two generators) 127*2=254 amp at 11 kv . What would be the cable size (XLPE) to supply 256 amp at 11 kv? Air or surrounding Temperature is 32 degree C. Cable will go under ground at 2.5 feet depth. Group Rating Factors is 3 cables. Clearance between cables is 7 cm. Soil Temperature (Ambient) 28o C Soil Thermal Resistivity is 1.2 K.m/W I would like to use 3 separate single core instead of using 3 core cable. Some says I should use three separate single core 120RM cables. Some says 70RM .some says 95. I m totally confused. Is there ant specific rule to determine cable size? What would be the LT cable size to flow 500 Amp current? Ifte My e mail address is ifte13@yahoo.com Anyone please send me the answer to my e mail address, i will be very glad.

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how to calculate optimum loading for transformer?

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in 3-phase transformer which type of transformet is used in output side?

6 Answers   Essar,

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what is meant by vector group of a transformer? How can it be derived?

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i am going to correct power factor of 1600kw induction motor,when i calculate capacitance of capacitor it is three time more in star connection than delta. if motor is star connected which connection i shall adopt for capacitors and reason for adopt this connection

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How many points does a Circuit can have?

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hr round

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What are the effects of electrical faults?

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why we maintain 50hz ,220volts,20Amp,ratings fixed every where in india,,electricity

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How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)

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