why the motor is rated as kw& transformer as kva
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Answer Posted / r.v.giribabu
To select a rating of any equipment, Output and Input
capacity is taken as a base point.
In a motor or any other electrical equipments, conductor
size is depend on current flowing through the conductor.
size of the core (Rotor and Stator or core of a
transformer) depends on voltage as flux induced in any AC
Machine is directly proprotional to Voltage/Frequency ratio.
Which culminates to Size of equipment directly depends on
Input/Output Voltage and Current of machine. that is why
rating is mentioned as Volatage X Current i.e. KVA.
Shortly, Size of machine is directly proportinal to KVA
ratring. that is why all the electro-magnetic machines are
rated in KVA.
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