Overvoltage on your incoming power lines can increase the temperature and reduce the life span of your equipment. The Model 2480 Voltage Extender is used to increase the usable voltage range on Time MarkÕs 480 volt three phase monitors up to 528VAC (Models A257B, A258B or 19-480). The Model 2480 has quick-connect tabs for easy connections to the incoming 3-phases and the output relay terminals as well as a built in 8-pin octal socket for the phase monitor. The 2480 can be surface mounted or DIN rail mounted.