At 440 volts, What motor rating in KW I will use wye delta starter.

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Originally Posted by addaddadd

at 440 volts, What motor rating in KW i will use wye delta starter.

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Star/Delta Starters are required to be fitted on all motors greater than 4KW (about 5 HP).
The applied voltage is irrelevant. Only the power requirement is the official deciding factor.
Of course nothing holds you back to install it on any smaller 3 phase motor.
They are used to reduce the start current applied to the motor during start.

Quote:

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Originally Posted by addaddadd

at 440 volts, What motor rating in KW i will use wye delta starter.

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I have NO idea what you are asking.
Regardless...


THIS IS NOT DIY WORK!!! CALL AN ELECTRICIAN!!!

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Originally Posted by Credendovidis

Star/Delta Starters are required to be fitted on all motors greater than 4KW (about 5 HP).
The applied voltage is irrelevant. Only the power requirement is the official deciding factor.
Of course nothing holds you back to install it on any smaller 3 phase motor.
They are used to reduce the start current applied to the motor during start.

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As for me, I recommend him to use wye-delta starter for 7.5hp and higher. For < 7.5hp just use CB and inverter, or cb and contactor (you can't vary the speed though)...