PLATE AS 4378911 - Caterpillar

SR4 Generator With Manual Voltage Control And Two PM Fuses
Manual Voltage Control Panel
(1) Switch (OFF, AUTO and MAN positions). (2) Voltage control rheostat. (3) Fuse.The manual voltage control can be used to control generator voltage when there is a failure in the generator regulator assembly. It will manually control the current flow to exciter stator L1.The manual voltage control panel has switch (1) and voltage control rheostat (2) for the manual operating mode.Switch (1) is used to make the selection between AUTO, MAN and OFF. In the "AUTO" position, the VR3F regulator controls the generator voltage. In the "OFF" position, the voltage will go to zero. In the "MAN" position, generator voltage is controlled by voltage control rheostat (2). The Manual Voltage Control Panel must not be installed in a location that is subject to engine vibrations or directly to outside weather. When the manual voltage control is operating in the "Manual" mode, it is not necessary for the VR3F regulator to be connected to the generator. However, the manual control must remain connected to generator permanent magnet lines No. 11 and No. 13.