The starting kVA required by a motor starting at full voltage is determined from the nameplate on the motor or from the manufacturer.
In general it is accepted that small motors requires higher starting kVA than larger motors. Standard 3 phase motors often have these locked rotor codes:
Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors.
Calculate amps, hp and kVA for electrical motors.
Calculate electric motor efficiency.
Full load operating torque vs. break down, pull up and locked rotor torque.
Electrical motors NEMA frame dimensions.
Calculate electric motors shaft power.
NEMA - electrical motor efficiency ratings.
National Electrical Code.
National Electrical Manufacturers Association.
Full load amps, wire and conduit sizes for three phase electrical motors.
Inductive loads and power factors with electrical three-phase motors.
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