UPS 750 Uninterruptible Power Supply Caterpillar

The flywheel power unit (FPU) cabinet for the UPS contains the flywheel and all of the associated electronics that are required to operate the flywheel.

Illustration 1	g03692404
(1) Utility gate driver board (2) Utility inverter module (3) DC capacitor module (4) Flywheel gate driver board (5) Flywheel interface board (6) Flywheel assembly (7) Vacuum pump (8) Rotor position sensor

Illustration 2	g03692407
(12) Horizontal fan (13) Fan interface board (14) Vertical fans (15) Flywheel inverter module (16) Vacuum gauge (17) Accelerometer (18) Excitation coil driver board (19) Armature cables