COMPRESSOR GP-REFRIGERANT 3282062 - Caterpillar

Illustration 1 g00779092
Manual Voltage Control Panel (Option) (1) Switch (OFF, AUTO, and MAN positions) (2) Voltage control potentiometer (3) FuseThe manual voltage control is an option. The manual voltage control can be used to control the generator voltage when there is a failure in the generator regulator assembly. The manual voltage control will manually control the current flow to the exciter stator. The manual voltage control panel has a switch (1) and a voltage control potentiometer (2) for the manual operating mode. The switch (1) is used to make the selection between the following positions: AUTO, MAN and OFF.In the AUTO position, the VR6 voltage regulator controls the generator voltage.
Illustration 2 g01021519
The Cat VR6 presents an electrical shock/electrocution hazard. This hazard will cause serious injury or death.Service by trained personnel only.The terminals and heat sinks are live at hazardous voltages when power is applied and for up to 8 minutes after power is removed.
In the OFF position, the generator output voltage will go to near zero.In the MAN position, the generator output voltage is controlled by the voltage control potentiometer (2) .Note: The manual voltage control panel must not be installed in a location that is subject to engine vibrations or to outside weather.Note: When the manual voltage control is operating in the manual mode, power MUST be removed from the VR6. Refer to the Testing and Adjusting, "Wiring Diagrams" for proper connections.Note: Do not rapidly switch the "Manual Voltage Control" (MVC) from "Manual" to "Auto" or from "Auto" to "Manual". The switch must stop or pause at the "OFF" position momentarily. If the position of the switch is changed too rapidly, then the VR6 will shut down due to the "Over Excitation" protection function.