Liebert Series 610 user manual Operating Instructions, Initial System Start-Up 4.2 Basic Operation

4.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.1 Initial System Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.2.1 Momentary Tie - Load Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2.2 Normal Transfer Operation Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2.3 Maintenance Procedures - Isolating Each UPS System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2.4 Isolating a UPS System for Maintenance - Combined Loads Operation. . . . . . . . . . . . . . . . . 26 4.2.5 Transfer of Load Between Two Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.2.6 Returning an Isolated System to Normal Operation - End Combined Loads Operation . . . . 27 4.2.7 Maintenance Procedures - Maintaining Power-Tie Components . . . . . . . . . . . . . . . . . . . . . . 27 4.2.8 Maintenance Procedures - Tie Control Logic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.2.9 Abnormal Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2.10 Trouble Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2.11 Continuous Tie-Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.2.12 Isolation for Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2.13 Operation Scenarios/Transfer Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

	FIGURES
Figure 1	Basic Dual-BusPower-Tieone-line diagram	. 2
Figure 2	Power-Tie systems - fault isolation issues	. 3
Figure 3	Power-Tie systems - control interface diagram	. 4
Figure 4	Power-Tie system one-line diagram	10
Figure 5	Control panel layout	12
Figure 6	Power-Tie system - fault isolation issues	16
Figure 7	Power-Tie systems - fault tolerance	17
Figure 8	Power-Tie system one-line diagram	32
Figure 9	From start-up to normal operation, loads to be split between two distribution feeders	33
Figure 10	From combined loads operation to loads split between two feeders	33
Figure 11	From continuous tied systems to loads split between two systems	33
Figure 12	Transfer both load feeders to one UPS	34
Figure 13	Both feeders on one system to normal operation	34
Figure 14	Transfer 100% load on one system to 100% load on a second system (a two-step operation) . . . 34
Figure 15	Normal split load operations to Continuous Tie	35
Figure 16	Continuous Tie to normal split load operation	35
Figure 17	Continuous Tie to load on one system	35
Figure 18	Load on one system to Continuous Tie	36
Figure 19	One system in bypass to both feeders combined on remaining operational system	36
Figure 20	One system in bypass to Continuous Tie operation (Option 1)	37
Figure 21	One system in bypass to Continuous Tie operation (Option 2)	37

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