Ups Circuit Breakers; Smart Load Off; Maintenance Bypass Switch; Cold Start Switch - Powerware 9330 Installation And Operation Manual

7.2.2

UPS 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.
7.2.3

Smart 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."
7.2.4

Maintenance 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."
7.2.5

Cold 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."

UPS Standard Features

7.3
The UPS has many standard features that provide cost-effective and consistently
reliable power protection:
7.3.1

Customer 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."
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Powerware 9330 (10 kVA- -40 kVA) Installation and Operation
164201300 REV. G 061502