Eaton Electrical Powerware 9315 operation manual To Place the UPS in Normal Mode

Starting and Stopping the UPS

The following describes the switches on the Control Panel (see Figure 4-1):

￿The MODE switch is a two-position rotary switch that controls the manual transfer of the UPS to and from Bypass mode. The MODE switch is used to:

-Place the critical load in Bypass mode when the UPS is operating in Normal mode and the bypass source is within acceptable limits. If the transfer does not occur within two seconds, an alarm sounds.

-Prevent transfer to Normal mode when the UPS is in Bypass mode.

-Shut down the power processing unit (inverter and rectifier) of the UPS.

￿The BATTERY switch is a two-position rotary switch that allows you to manually shunt trip the battery breakers in remote cabinets.

￿The circuit breaker (CB1) switch controls the operation of the rectifier and inverter. If CB1 is on (closed), the rectifier turns on when the START switch is activated and the proper voltage is at the input terminals.

￿The PUSH TO RESET button is described in “Resetting the UPS System after Load Off” on page 11-2.

￿The START switch activates the power controls on the Control Panel. The START switch is center-biased (the key will rest only in the upright position). Its operation is similar to that of an automobile ignition switch. After setting the operator controls, you turn the START switch to the right momentarily to activate the controls. When you release it, it returns to the upright position.

The following sections describe how to operate these controls to start, stop, or change the operating mode of the UPS.

4.1.1To Place the UPS in Normal Mode

1.Close the Input Power Feeder breaker.

2.Verify that the Load Off PUSH TO RESET button is pressed in.

3.Turn the BATTERY switch to NORMAL.

4.Turn the MODE switch to NORMAL.

5.Move the CB1 switch to ON.

6.Turn the START switch to the right momentarily.

The rectifier turns on, then the inverter turns on. The UPS display and alarm alert you to close the battery breaker.

7.Close the battery breaker(s).

4-2 EATON Powerware® 9315 UPS (200–300 kVA) Operation Manual S 164201036 Rev F powerware.com