Hello!
I have a question about the delta and star connection. I know that if the motor is connected in a star, the voltage will be 230 V, and if the motor is connected in a triangle, it will be 400 V. After reading a few topics on the forum, I also learned about a voltage of 690V when connected in a star. Where does it come from? 230*3?
greetings and Merry Christmas!
It is taken from the normal 3x400V mains. You don't have to take anything - this is a parameter that determines the work of the windings when connected in star and delta with a switch.
If there is an inscription on the nameplate
230/400 or (220/380) This means that it can only work star-coupled.
380V/660V (400V/690V - approx. -> 400V x √3 = 690V ) connected to the mains can work both star- and delta-coupled. Then you can use the λ/Δ switch to reduce the starting current of the motor (unless the motors were rewound according to someone's "wish").
In the first case (230/400) the motor can work with a voltage of 3x230 connected in delta, but powered by an inverter, i.e. powered with a voltage of 3x230V
[Acres]
I have a question about the delta and star connection. I know that if the motor is connected in a star, the voltage will be 230 V, and if the motor is connected in a triangle, it will be 400 V. After reading a few topics on the forum, I also learned about a voltage of 690V when connected in a star. Where does it come from? 230*3?
greetings and Merry Christmas!
It is taken from the normal 3x400V mains. You don't have to take anything - this is a parameter that determines the work of the windings when connected in star and delta with a switch.
If there is an inscription on the nameplate
230/400 or (220/380) This means that it can only work star-coupled.
380V/660V (400V/690V - approx. -> 400V x √3 = 690V ) connected to the mains can work both star- and delta-coupled. Then you can use the λ/Δ switch to reduce the starting current of the motor (unless the motors were rewound according to someone's "wish").
In the first case (230/400) the motor can work with a voltage of 3x230 connected in delta, but powered by an inverter, i.e. powered with a voltage of 3x230V
[Acres]
