Liebert 1000kVA manual 500kVA, Description Function

Operation

Figure 8 Typical operator controls

100kVA-

500kVA

5

2

5

4

1000kVA

3

5

2

1

Table 1		Typical operator controls
Item		Description	Function
			This manually operated circuit breaker provides power to the UPS module rectifier. In
1	Input Circuit Breaker (CB1)		625-750kVA modules and some 500kVA modules, this breaker is located in the
			transformer cabinet.
2	Module Output Circuit		This manually operated circuit breaker connects the UPS module inverter output to the
	Breaker (CB2)		UPS System Control Cabinet.
3	Operator Control Panel		Refer to Figure 10 for controls available on this panel.
4	Control Disconnect		These two fuses provide power to the controls. They are normally closed (ON). Turn
	(behind inner door)		Control Power OFF (by opening the two fuse holders) only for maintenance procedures.
5	Interlock Button		Press this button to make authorized changes to any parameter protected by the
	(on rear of Control Panel)		Security Access function. This includes time, date, auto-dial phone numbers, etc.

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