Answer / krish

1)Transformer is an static device and original it has no PF(
when no load is connected to it),only real power is taken
into account,motors use both real and reactive power for
working so its rating is in KW

2)in transformer iron loss and copper loss is taken in
consideration so KVA is used

Answer / asmita

in a T/F Copper losses depends on Current & iron losses
depends on Voltage.T/F being a static device windage
& friction losses r nt present there.Therefore T/F rating
is always in KVA.

Answer / vinit tomar

both ratings are same

because
transformer can works on high voltage & current so we use the rating KVA =killo volt ampere

P=VI
here A is used to denote current in amperes
AND motors can works only low voltage
so we used rating for motors WATTS
P=VI watts
P=I.IR

Answer / krish

A = Appearing as a first letter denotes Aluminium Conductor.

Y = TROPODUR (PVC) Insulation or TROPODUR (PVC) Sheath
depending on the position in which it appears.

2X = TROPOTHEN-X (Cross-linked Polyethylene) Insulation.

W = Round Steel Wire Armouring.

WW = Double Round Steel Wire Armouring.

F = Formed Steel Wire (Strip) Armouring.

FF = Double Formed Steel Wire (Strip) Armouring.

C = Metallic Screening (Usually of Copper).

CE = Metallic Screening (usually of Copper) over each
individual core.

Gb = Holding Helix Tape (of Steel)

Wa = Aluminum Round Wire & Aluminum Formed Wire (Strip) Fa
Armoring

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