Emerson 480V LBS Mode-Load Bus Synchronization, Replacing Dust Filters, Remote Alarm Monitor

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10.2LBS Mode—Load Bus Synchronization

The function of LBS is to keep the output of two independent UPS systems (single unit or multiple unit) in synchronization even when the two systems are operating in different modes (bypass/ inverter) or on batteries. It is usually used with a Static Transfer Switch connected to the critical load to achieve dual bus configuration.

NOTE

In LBS configuration, both units must be supplied from the same utility source.

10.2.1Remote Alarm Monitor

Status and alarm conditions are available on an optional remote alarm monitor (RAM) panel, which is driven by volt-free alarm status contacts (from an optional relay alarm board).

10.3Replacing Dust Filters

1.Open the UPS door.

2.The dust filters are behind the door. For each filter, there is a bracket on either side holding the dust filter in place, as shown in Figure 58.

3.Remove one bracket and loosen the other. The second bracket need not be removed.

4.Remove the old filter and replace with the new filter

5.Reinstall the bracket that was removed and tighten the other bracket.

Figure 58 Dust filter replacement

Bracket
Sems screw	Bracket

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