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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Image 27
Liebert 1000kVA manual 500kVA, Description Function