Liebert 1000kVA manual Operation

Operation

Figure 9 Operator controls, typical SCCT System Control Cabinet

Table 2	Typical SCCT System Control Cabinet operator controls
Item	Description	Function
1	UPS Output Circuit	This motorized circuit breaker connects the critical load to the UPS system
	Breaker	output.
2	System Bypass Circuit	This motorized circuit breaker connects the critical load to the bypass line.
	Breaker
3	Operator Control Panel	Refer to Figure 10 for controls available on this panel.
4	Interlock Button	Refer to Figure 11.
	(on rear of Control Panel)
5	Close Bypass Switch	Refer to Figure 11.
	(behind door)
6	Bypass Reset Switch	Refer to Figure 11.
	(behind door)
		These manually operated switches disconnect the static switch from the
		bypass line and from the critical load. They are normally ON (closed). Turn
	Static Switch Disconnects	them OFF (open) only to isolate (disconnect) the static switch for
7		maintenance procedures. For SCCT less than 1600A, the static switch
	(behind door)
		disconnects are contactors that open automatically upon loss of bypass input
		power and close automatically when bypass power is restored. Control power
		fuse disconnects are used to manually open the contactors for maintenance.
		Press these two switches before closing Static Switch Disconnects when
	Reset Switches (SW1) for	recovering from a shutdown that includes loss of Control Power. Green LED
8	Static Switch Disconnects	on means Control Power is available. Red LED on means Reset Switch
	(behind door)	needs to be pushed. Only SCCI and SCCC control cabinets and SCCT
		1600A and larger.
9	Control Power Disconnect	Normally ON. Fuseblocks that are labeled F7 through F10. Turn OFF Control
	(behind door)	Power only when required for maintenance procedures.

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