Eaton 93PM Installation Guide Page 17

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P-164000249 30-200 kW 9
Revision 2 User's and Installation Guide
Figure 2-1: Eaton 93PM UPS
2.1 Looking inside the UPS system
The system level static bypass in the Eaton 93PM UPS cabinet determines the attainable output
power of the UPS. The static bypass line consists of static switch and a backfeed protection isolation
device connected in series. In addition, there is a system level control unit that constantly monitors
the power delivered through the bypass line or to the input of the UPS. Transfers to static bypass are
seamless and performed automatically by the system as needed, for example, in case of an extended
system overload.
Each UPM power module includes a rectifier, battery converter, inverter and independent controls.
Each UPM is able to operate and share the load independently, despite the status of the other UPMs.
In addition, the system can have a UPS internal maintenance bypass switch as a factory installed
option.
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