CONTROL GP-AIR & TEMPERATURE 1501387 - Caterpillar

Phase Match
The UPS is still delivering power to the load. The UPS has qualified the input voltage. Additionally, the UPS will match the output (frequency and phase) to the input source.Walk In
Once a phase match is achieved, the UPS connects to the source. Then, the UPS transfers the load from the flywheel to the source. The Uninterruptible Power Supply initiates the on-line state (motoring state) upon completion of the "walk in" state. Self-Discharge (Service Mode Only)
This state stops the flywheel electrically. This state is used for the following:
Prepare the system to be moved.
Secure the system for maintenance.
The On-line Self Discharge Mode can be entered once in a 24 hour time period. The system will not go into this state automatically.Bypass Modes
Illustration 3 g01254176
Diagram of Bypass ModeThe bypass circuit powers the critical bus for