Eaton 93E UPS 15-80 kVA (380/400/415 V)
Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved.
Revision: 001
Document ID: 614-01975-00
77 (133)
from the normal mode to the bypass mode manually. The bypass source
supplies the commercial AC power to the load directly. Figure 31 shows
the path of electrical power through the UPS system when operating in
the bypass mode.
Figure 31.Path of current through the UPS in the standard bypass mode
A
Static switch
1
Bypass input
Main power flow
B
Rectifier
2
Rectifier input
Energized
C
Inverter
3
Output
De-energized
D
Battery
converter
4
Battery
breaker
Closed
E
Battery
K1
Rectifier input
relay
Open
K3
Output relay
K5
Backfeed
contactor
In the bypass mode, the output of the system is provided with 3-phase
AC power directly from the system input. While in this mode, the output
of the system is not protected from voltage or frequency fluctuations or
power outages from the source. Some power line filtering and spike
