Eaton 93PM - Normal Operating Modes

Operating mode Description
Stored energy mode Energy is drawn from a DC backup power
source and converted to AC power by the
UPS inverter. Most commonly VRLA bat-
teries are introduced to the system for this
purpose, and the mode of operation is
called the battery mode
Bypass mode Critical load is supported directly by utility
power through the UPS static switch.
3.2.1 Normal operating modes
During normal UPS operation, power for the system is derived from a utility input
source. Unit Online is displayed on the front panel, indicating that the
incoming power is within voltage and frequency acceptance windows.
3.2.1.1 Double conversion mode
Figure 2 shows the path of electrical power through the UPS system when the
UPS is operating in the double conversion mode.
Eaton 93PM UPS 30–200 kVA User's and installation guide
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Eaton Corporation plc 2017. All rights reserved. Revision: 005 Document ID: P-164000249 19 (126)