PLUNGER ASSEM. 1S3267 - Caterpillar

System Shutdown Procedure
Note: Refer to this Operation and Maintenance Manual, "Modes of Operation", for a complete description of all System Modes.Note: When the flywheel is spinning, the following components are energized: bus and armature leads.To perform a system shutdown, follow the steps below:
Turn the SIO cabinet key switch to the "Bypass" position.
Illustration 1 g06011800
Confirm that the system is in "Bypass" by observing the System Diagram/Overview screen shown above.Note: CAUTION: Continuing with this procedure will disconnect the critical load from the output of the UPS.
Illustration 2 g03354398
SIO and FPU cabinet connections - simplified diagram
Disconnect the facility load circuit from the output. (See Illustration 2).
Remove facility power from the input. (See Illustration 2).
Remove facility power from the bypass input. (See Illustration 2).
Allow the capacitor banks to purge down for approximately five minutes. This action is performed to dissipate any residual energy in the bus and armature leads.Note: While the flywheel is spinning, the following components are energized: bus and armature leads.