Liebert NfinityTM Modes of Operation, Normal Mode, Backup Mode, Auto Restart Mode, Bypass Mode

Introduction

1.2Modes of Operation

INPUT	MANUAL	OUTPUT
	BYPASS

EMI	POWER	OUTPUT &	OUTPUT
FILTER	MODULE(S)	BYPASS	TRANSFORMER
		CONTACTOR

BATTERY

MODULE(S)

USER	CONTROL	SYSTEM
		CONTROL
INTERFACE	INTERFACE
		MODULE(S)
	COMMUNICATIONS	POWER
		CONTROL

Normal Mode

The Power Module rectifiers derive power from a utility AC source and supply regulated DC power to the inverter. The module’s inverter regenerates precise AC power to supply the connected equipment. The battery charger is in the Power Module and maintains a float-charge on the batteries.

Backup Mode

When AC utility fails, the connected equipment is supplied power by the inverter, which obtains energy from the Battery Modules. The output power equipment will not be interrupted during the failure or restoration of the AC utility source.

Auto Restart Mode

After a power outage and complete battery discharge, and once AC utility is restored, the UPS will automatically restart and resume supplying power to connected equipment. This feature is enabled at the factory, but can be disabled by the user. The user can also program two auto restart delay settings:

1.Battery capacity level (%)

2.Countdown timer

Bypass Mode

The bypass provides an alternate path for power to the connected equipment and operates in the fol- lowing manner:

•Automatic

In the event of an internal fault or should the inverter overload capacity be exceeded, the UPS performs an automatic transfer of the connected equipment from the inverter to the bypass source.

•Manual

Should the UPS need to be taken out of service for limited maintenance or repair, manual activa- tion of the bypass will cause an immediate transfer of the equipment from the inverter to the bypass source.

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