Emerson 10-30kVA, 208V 4.3Bypass Mode, 4.4Maintenance Mode, 4.5Locating the Cabinet

Maintenance Bypass Cabinet

4.3Bypass 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.

4.4Maintenance 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, no power is supplied to the UPS and the load is NOT pro- tected by the UPS.

4.5Locating the Cabinet

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.

4.6Cable Installation

4.6.1Wiring 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 18). Remove these and keep the screws and plates for reinstallation.

Figure 18 Maintenance Bypass Cabinet—access plate removed

Extract screws from corners to remove the access plate

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