Emerson 540VDC manual Appendix A.5.3 IKIT-A05 DC Power Connections

UPS Interconnection Kits

Appendix A.5.3 IKIT-A05 DC Power Connections

The DC power connections to the Liebert FS are made through the circuit-breaker (see Figure 103) in the IKIT-A05. The minimum wire size to be used is 1/0 AWG - 600VDC wire (54 mm2 wire section). The maximum wire size for the circuit-breaker terminals is 350MCM – 600VDC (150 mm2 wire sec- tion). All wiring must comply with all applicable local, regional, national regulations. Use copper con- ductors only, rated minimum 140°F (60°C).

Figure 103 Circuit-breaker (open door and cabinet faceplate removed)

Liebert FS positive terminal

Liebert FS negative terminal

The Liebert FS cabinet is configured for top entry cables in standard configuration. The cables can also be run through the side panels. The Liebert FS cabinet does not accommodate bottom entry cables.

The connection of the circuit-breaker is described in Figure 135 - Elevation drawing—Liebert FS cabinet with integrated circuit breaker. Refer to this drawing to ensure that the proper connec- tions are made.

Circuit Breaker Torque

Tighten the positive and negative terminals of the DC power connections on the circuit breaker to

250in-lb. (29 N-m) unless the equipment is labeled with a different torque value.

Appendix A.5.4 UPS Configuration—Liebert FS and Liebert HiPulse

To optimize the integration between the interconnected UPS system and the Liebert FS, some param- eters must be checked on the UPS system:

•The UPS rectifier walk-in time must be set at a value as low as possible. Please check with your UPS Manufacturer representative if your unit has received the upgraded board that enables the setting of “rectifier walk-in time” lower than standard.

•Check that the “auto battery self test” has either been disabled or upgraded to accommodate Liebert FS integration.

97	DISCONTINUED
	PRODUCT