Eaton 9395 Maintenance Bypass Module Installation and Operation Manual
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164201719 Rev 3
www.eaton.com/powerquality
6-1
Chapter 6
MBM Operating Instructions
This section describes how to operate the Maintenance Bypass Module (MBM).
NOTE
Before using the MBM, ensure all installation tasks are complete and a preliminary startup has been
performed by authorized service personnel. The preliminary startup verifies all electrical interconnections to
ensure the installation was successful and the system operates properly.
NOTE
Read this section of the manual and have thorough knowledge of MBM operation before attempting
to operate any of the controls.
6.1
MBM Controls and Indicators
The controls and indicators identified and described in this section are used to control
and monitor MBM operation.
The MBM can contain the following controls:
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Maintenance bypass breaker (MBP) (standard)
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Maintenance isolation breaker (MIS) (standard)
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Bypass input breaker (BIB) (optional)
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Rectifier Input breaker (RIB) (optional)
Figure 6‐1 through Figure 6‐4 show the MBM controls and indicators.
6.2
Using the UPS when an MBM is Installed
NOTE
Before starting the UPS with the MBM, verify all installation tasks are complete and a preliminary
startup has been performed by authorized service personnel. The preliminary startup verifies all electrical
interconnections to confirm the installation was successful and the UPS operates properly.
1.
Unfasten the MBM front door latch and swing the door open.
2.
Verify that the MBM circuit breakers and switches are set as follows:
MBP
Open
MIS
Closed
BIB (if installed)
Closed
RIB (if installed)
Closed
3.
Start the UPS in Normal mode. Refer to the instructions in the operation chapter
of the applicable Eaton 9395 UPS Installation and Operation manual listed in
paragraph 1.7 on page 1-4.
4.
Close the front door and secure the latch.
Figure
