Answer
The Winco, 64863-008 is intended for use with 3-phase systems with voltages of 120/208 or 120/240. This device is capable of accommodating either voltage , as the manual switches do not include coils or other voltage-dependent components.
As long as the voltage does not go over what the switch is rated for it can be used. Example, you can use this switch for either 208V or 240V three phase voltage, but not for 480V.
We do not offer any other 3-phase manual transfer switches.
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