Emerson 540VDC manual 395VDC

UPS Interconnection Kits

Appendix A.4.4 Liebert FS Configuration - Single Liebert FS on Series 300 DC Bus

The following Software Control Parameters must be reset when the Liebert FS is connected to the DC Bus of the Liebert Series 300 UPS system.

NOTE

The Software Control Parameter values specified below are recommended. These values may require adjustments due to the battery type. These must be used unless otherwise specified by the Liebert-certified service technician at initial system startup.

Instructions to set these parameters on the Liebert FS are in 6.5.3 - Control Parameters Setup at Initial System Startup.

Table 26 Liebert FS Software Control Parameter settings

Liebert FS Software Control Parameter	Setting
Charge Voltage	395VDC
Regulation Voltage	385VDC
Vreg Delta	0VDC
Maximum Charge Current	See Table 27
Charge Amps/Volts	See Table 27

Table 27 Liebert FS Software Control Parameters varying with UPS size

UPS Output Rating (kVA)	10	15	20	30	40	50	65	75	100	125
Liebert FS Maximum Charge Current (A)	5	8	10	16	21	26	34	39	50	50
Liebert FS Charge Amps/Volts (A/V)	0.7	1.1	1.4	2.1	2.8	3.5	4.5	5.2	6.7	6.7

Appendix A.4.5 Liebert FS Configuration - Multiple Liebert FS Units on Liebert Series 300 DC Bus

Liebert FS Software Control Parameters must be reset when multiple Liebert FS units are connected in parallel on the DC bus of a Liebert Series 300 UPS system for proper operation with longer run times or higher backup power requirements.

Instructions to set these parameters on the Liebert FS are in 6.5.3 - Control Parameters Setup at Initial System Startup.

NOTE

In this configuration, the UPS DC bus usually does NOT have batteries in parallel with the Liebert FS units, however, parallel operation with batteries is acceptable. If batteries to be used are in parallel with the Liebert FS units on the UPS DC bus, contact your local Liebert sales representative to arrange a review of the application.

NOTE

Your Liebert-certified service technician will configure the Software Control Parameter values at initial system startup depending on the number of paralleled units.

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