PULLEY 0845578 - Caterpillar

switch gear or the generator set control panel will initiate "Reverse Var Tripping".
Operate the generator in "Stand-Alone" mode.
Start the CDVR PC software, establish communication, and then go to the "Metering" screen.
Apply a small reactive load.
Check the kWatts and Kvar values in the "Metering" screen.
If both kWatts and Kvar are negative, the CT may be wired backwards. Check the wiring to the CT. Alternately, the "A" and "C" sensing leads may be reversed. Physically check the connections from the bus bars to the sensing inputs for correct ordering (12-10, 12-11, and 12-12 are C-B-A respectively).
If either kWatts or kvar is negative, and the other is positive, the "A" and "B", or "B" and "C" sensing leads may be reversed. Physically check the connections from the bus bars to the sensing inputs for correct ordering (12-10, 12-11, and 12-12 are C-B-A respectively).