If someone could clear up some slight confusion it would be much appreciated, i have read some contridicting answers on the net.
I know the motor current formula is A= POWER/VOLTS*1.73*EFF.*P.F
And i know the following for Star, I line = I phase, V line= 1.73*V phase
Delta, I line= 1.73*I phase, V line= V phase
Delta line current is 3 times more than if it was connected in star.
Now the confusion starts, from what i have read you apply the top formula for calculating motor current weather its in Star or Delta.
I know the nameplates tell you the info but sometimes it is missing or some of the data is worn away as i have had before.
IF you know only the KW and Volts and want to know the current by applying the formula is this giving you Delta or Line current?
If its the Star current and you want to connect it in Delta do you times this value by 3 to find delta value.
If its the Delta value and you want to connect in Star, do you divide this answer by 3 to get the current.
Or are there different formual for finding out the current of a motor if you connect it in star and delta (star /delta- starting).
Am i over complicating this or missing something simple?
Thanks in advance.
I know the motor current formula is A= POWER/VOLTS*1.73*EFF.*P.F
And i know the following for Star, I line = I phase, V line= 1.73*V phase
Delta, I line= 1.73*I phase, V line= V phase
Delta line current is 3 times more than if it was connected in star.
Now the confusion starts, from what i have read you apply the top formula for calculating motor current weather its in Star or Delta.
I know the nameplates tell you the info but sometimes it is missing or some of the data is worn away as i have had before.
IF you know only the KW and Volts and want to know the current by applying the formula is this giving you Delta or Line current?
If its the Star current and you want to connect it in Delta do you times this value by 3 to find delta value.
If its the Delta value and you want to connect in Star, do you divide this answer by 3 to get the current.
Or are there different formual for finding out the current of a motor if you connect it in star and delta (star /delta- starting).
Am i over complicating this or missing something simple?
Thanks in advance.