Emerson 10-30kVA Manuel D’Utilisation

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. 

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, no power is supplied to the UPS and the load is NOT pro-

tected by the UPS.

This Maintenance Bypass Cabinet may be mounted to the left of the UPS or installed as a stand-alone 

unit. In either case, ensure that the unit is in a well-ventilated area and that there is clearance for 

access to the switches and cable connections as required by national and local codes.

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.

Plates cover the input and output terminals on the front of the Maintenance Bypass Cabinet (see 

Figure 18). Remove these and keep the screws and plates for reinstallation.

Please read this section thoroughly before attempting to install wiring to this unit.