People installing DTSC-200A  , easYgen-400, -600, -800, - 1400, -1600 , - 1700 & -1800  controls in an 400, 440, 480  VAC voltage application are sometimes confused , if they are seeing this pic in  instruction manual :

To be compliant  to  UL6200 Standard, we have to limit Line to Line voltages  to max 300VAC.

The limitation factor is connectors' spacing  from terminal to terminal  of  AC voltage measurement inputs.

If you built a control panel which is not according to UL6200 you can go up to 480VAC Line to Line as described in manuals

Technical Data: