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Powerware 9335 (80 kVA and120 kVA) Installation and Operation 5-1
164201396 REV. A 071103
5.1 Looking Inside the UPS System
The Powerware 9335 is a continuous duty, solid-state, transformerless (at 480 VAC) three
phase, true online system that provides conditioned and uninterruptible AC power to the
UPS systems output. The UPS supports process control, data processing,
telecommunications/PBX, and research equipment. The Powerware 9335 maintains power
to the critical loads during commercial electrical power brownout, blackout, overvoltage,
undervoltage and out-of-tolerance frequency conditions.
The basic system consists of a:
• rectifier
• battery charger
• DC booster
•
Inverter
•
monitoring/operation control panel
•
integrated communications server
•
microprocessor controlled logic
In this manual, the power required by your equipment is called the critical load. The UPS
supplies the critical load with conditioned power that is synchronized with your utility power.
Figure 5–1 shows the main elements of the UPS.
5
Understanding UPS Operation