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4.3
Bypass Mode
When the Maintenance Bypass Cabinet is in the Bypass mode it provides an alternate path for power
to the connected equipment. Should the UPS need to be taken out of service for limited maintenance
or repair, manual activation of the bypass will cause an immediate transfer of the equipment from the
UPS inverter to the bypass source. In this mode, power will still be supplied to the UPS; however, the
load is NOT protected by the UPS. The bypass switch is in the BYPASS position for this mode.
4.4
Maintenance Mode
When the maintenance bypass cabinet is in the Maintenance mode it provides an alternate path for
power to the connected equipment. Should the UPS need to be taken out of service for limited mainte-
nance or repair. In this mode of operation the load is NOT protected by the UPS. The Bypass Switch
is in the MAINTENANCE position for this mode.
4.5
Mounting the Cabinet
This Maintenance Bypass Cabinet may be mounted to the left of the UPS or installed as stand-alone
unit. In both cases, ensure that the unit is in a well-ventilated area with at least 12 inches (305mm)
clearance for access to the switches and cable connections.
4.6
Cable Installation
4.6.1
Wiring Preparation
Be sure that the unit is not connected to any AC utility power source or UPS before installing any wir-
ing to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electri-
cian.
WARNING
!
Please read this section thoroughly before attempting to install wiring to this unit.
Removing the Cover Plates
Plates cover the input and output terminals on the front of the Maintenance Bypass Cabinet (see
Figure 15). Remove these and keep the screws and plates for reinstallation.
Figure 15 Maintenance Bypass Cabinet—access plate removed
Extract screws
from corners to
remove the
access plate
28
Maintenance Bypass Cabinet
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