UPS 750 Uninterruptible Power Supply Caterpillar

System Startup Procedure

1. Turn the system key switch to the "Bypass" position.

2. Prepare for the UPS output bus to have voltage present.

3. Apply power to the input. Apply power to both inputs if the UPS is a dual input system.

   Note: If K3 is closed, voltage is present on the UPS output. If K3 is open before power is applied, the key switch may need to be cycled to get K3 to close.

4. Turn the system key switch to the "Online" position.

5. The system will do the following:

   • Close K1

   • Ramp the DC bus with the line static switch

   • Turn on the utility inverter

   • Motor the flywheel to 7700 RPM

   • Close K2

   • Open K3

6. Confirm that the system is "Online" by observing the "Systems Diagram/Overview" screen.