I am trying to follow the example for locked rotor calculation using the code letter table 430.7(B) and example in the NEC HANDBOOK. I don't understand where the 1.73 x 0.46 for the 460 volts is coming from to come up with the 158 amps. can anyone explain in more detail then the example?
3 phase locked rotor calc's
- Thread starter rickh
- Start date
- Status
- Location
- Logan, Utah
In the example you are looking at 1.73= the square root of 3, and .46 is the kv or 460 volts expressed as kilovolts.
So in the example you are taking the locked rotor kVA and converting it to amperes using the formula,
Locked rotor kVA/ the square root of 3 X kV.
Chris
So in the example you are taking the locked rotor kVA and converting it to amperes using the formula,
Locked rotor kVA/ the square root of 3 X kV.
Chris
- Location
- Logan, Utah
Your welcome,
Oh and by the way Welcome to the Forum.
Chris
Oh and by the way Welcome to the Forum.
Chris
- Status