Relay Systems of America

    Relay Systems, Inc. introduces it’s new AC Solid State Fan Contactor. This hybrid contactor offers our patented RelayCard technology along with state of the art AC solid state relays, combined in a package that yields a direct replacement for Square D style contactors. The modular design that is incorporated into all of our relays is also present in the AC fan contactor. Replacement of main components including AC load relays, control board and auxiliary load relays. The model shown above is complete with it’s own thermostatically controlled fan and requires only a vent in AC cabinet. Other models have different heat sink configurations that allow use in a pressurized AC cabinet. Such models would not incorporate a heat sink fan, cooling is accomplished by the flow of pressurized air. Air flow would generally come from an external blower or piping directly from traction motor cooling duct. This contactor can be used alone or in mixed installations with mechanical style contactors. Models available with three pole switching with slightly larger foot print. Current ratings on standard models are 125 amps continuous with larger models to 250 amps continuous and higher.