As previously described, the INVERTER is designed to protect your critical load from brownouts, blackouts, and transient conditions, all of which are common in the normal AC power environment. In this section, you will follow through the steps necessary to test the major functions of your INVERTER to ensure the system is operating properly and will be functional when needed. Before performing the steps in this section, confirm that the preceding sections are completed.
An INVERTER is designed to supply power even when the AC input is off. To avoid equipment damage or personal injury, assume the INVERTER terminals and components may have voltage present at any time.
If either the AC input power is lost or the rectifier/charger fails, the DC input to the inverter will drop in voltage as the unit operates off of the batteries. To simulate either of these failures, shut down the chargers supplying the inverter battery. The inverter will continue to run until the battery reaches 1.75V per cell. At this time the inverter will shutdown. In the unlikely event the system does not perform as specified, follow the shutdown procedure and contact the Dependable power systems service department.
The loss of the bypass input will cause the "IN SYNC" LED to go out. The system will continue providing clean, regulated power to run the critical load indefinitely. However, any action that may result in a system overload, i.e., the starting up of equipment or motors, should be avoided.