7.2.2UPS Circuit Breakers
The UPS can contain as many as 10 circuit breakers, depending on the system options. The UPS circuit breakers are described in detail in Chapter 9, “UPS Operating Instructions.”
UPS Cabinet
CB1 controls the input to the UPS rectifier, while CB2 controls the battery input to the UPS inverter. CB1 and CB2 are manually controlled.
Optional Battery Cabinet
A local battery circuit breaker controls the output of each battery cabinet, providing the ability to service each battery string individually.
Optional Options Cabinet
Input, output, and bypass circuit breakers control the flow of current to and from the installed transformers.
7.2.3Smart LOAD OFF
A smart LOAD OFF pushbutton is provided for situations where you must quickly control the UPS output. The pushbutton is located on the front of the UPS for quick access, but provides a safety feature to prevent inadvertent load dumps. The LOAD OFF pushbutton is described in detail in Chapter 9, “UPS Operating Instructions.”
7.2.4Maintenance Bypass Switch
An internal Maintenance Bypass switch is provided to completely isolate the main power processing unit of the UPS during service. The Maintenance Bypass Switch is described in detail in Chapter 9, “UPS Operating Instructions.”
7.2.5Cold Start Switch
A Cold Start switch is provided to start the UPS in Battery Mode when no commercial power is available. The Cold Start Switch is described in detail in Chapter 9, “UPS Operating Instructions.”
7.3UPS Standard Features
The UPS has many standard features that provide
7.3.1Customer Interface
Computer Interface
One serial communications port is standard on all units, and is electrically isolated from the UPS. You can use this ports to link the UPS to the features described in Chapter 12, “Serial Communications” and Chapter 13, “Remote Notification.”
Building Alarm Monitoring
You can connect your facility’s alarm system contacts to four (4) inputs in the UPS. The UPS uses these inputs to monitor your building alarms in addition to the UPS status. This feature is described further in Chapter 10, “Using Features and Options.”
Powerware 9330 (10 | |
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