Controls and Features
UPS Controls
The UPS has three primary control areas as described in the following paragraphs.
Control Panel
The Control Panel on the front of the UPS (see Figure 22) contains the operator controls to start and stop the UPS and change the operating mode. The Control Panel is described in Using the Operating Controls section of Chapter 10.
Monitor Panel
The Monitor Panel on the front of the UPS (see Figure 22) contains an LCD screen to display the current status of the UPS. You can view a statistical history and log of UPS events and display a
Maintenance Bypass
Maintenance Bypass (MBP) Circuit Breaker
This breaker is normally open. When closed, it feeds utility power to the critical load when the MIS breaker is opened.
Maintenance Isolation (MIS) Circuit Breaker
This circuit breaker is normally closed, feeding UPS power to the critical load. This breaker is opened to isolate the UPS after the MBP breaker is closed.
Maintenance Bypass (MBP) Circuit Breaker
This circuit breaker is normally closed feeding bypass power to the UPS internal bypass circuit. This breaker is opened to isolate the UPS bypass after the load is transferred to maintenance bypass.
UPS Standard Features
The UPS has many standard features that provide
Communication Panel
Computer Interface
One combination
Summary Alarm Contacts
Alarm contacts are provided for connection to equipment at your facility, such as a light, an audible alarm, or a computer terminal. The equipment you connect to these contacts alerts you to a UPS alarm.
Input Filter
Your unit may be equipped with an input filter. An input filter yields power factor correction that allows you to save on your initial installation and operating costs. The filter also reduces input harmonic current distortion and minimizes upstream interference that can damage sensitive hardware components.
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