Figure 9: The dimensions of the Eaton 91PS/93PS UPS frames
Cabinet A in the illustration is the 91PS/93PS C-model.
4.4.3 UPS system power wiring preparations
NOTE: If you install a maintenance bypass, provide one of the following:
• a minimum of 2 separate feeds with upstream feeder breakers
• a single feed with 2 upstream feeder breakers: one for the UPS or rectifier
input breaker and one for the maintenance bypass input.
Do not use a single feed or a single feeder breaker to supply
• the maintenance bypass and the UPS, or
• the maintenance bypass and the rectifier input breaker.
If a bypass input breaker is installed in the maintenance bypass and a single-
feed UPS is being installed, a single feed to the maintenance bypass is
acceptable for supplying both the UPS and the bypass.
An additional single feed kit (P-103002165 KIT 93PS-20 SINGLE FEED) is
available for the 93PS 8–20 kW cabinet. Maximum conductor cross section of the
single feed is 35 mm
2
.
WARNING
Do not install units with three-phase input and single-phase output with
a single feed for rectifier (three-phase) input and bypass (single-phase)
input.
© Eaton Corporation plc 2020. All rights reserved. Revision: 006 Document ID: P-164000493 42 (126)
Eaton 91PS/93PS UPS 8–40 kW User’s and Installation Guide
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