UPS Operating Instructions6-32 Eaton 93PM UPS (20–100 kW, 480V – 100 kW Frame) Installation and Operation Manual P-164000227—Rev 6 www.eaton.com/powerquality6.4.18 Using the Remote Emergency Power-off SwitchWARNINGEmergency Power Off (EPO) and Remote Emergency Power Off (REPO) functionality is disabledfor UPS systems configured for UL 924 auxiliary lighting. To remove power from the system aLOAD OFF command (see paragraph 6.4.17) must be given using the front panel controls and allbreakers opened.A UPS emergency power-off is initiated by the REPO pushbutton switch. In an emergency, you can use thisswitch to control the UPS output. The REPO switch de-energizes the critical load and powers down the UPSsimmediately, without asking for verification.The UPSs, including Bypass, remains off until restarted.CAUTIONAll power to the critical load is lost when the REPO switch is activated in the following step. Youshould use this feature only when you want to de-energize the critical load.To use the REPO switch:1. Firmly push the red pushbutton until it locks into place. The switch latches into the activated state(see Figure 6-21).The rectifier, inverter, battery, and bypass switchgear open, and the power module is turned offimmediately on all UPSs, without asking for verification.CAUTIONDo not attempt to restart the system after the REPO until the cause of the shutdown has beenidentified and cleared.2. To deactivate the REPO switch in preparation for restarting the UPS, insert the supplied key and rotateclockwise until the red pushbutton releases (see Figure 6-21). To remove the key, rotate the key back tothe vertical position.3. Restart the UPS by following the procedure in paragraph 6.4.1 or 6.4.2.WARNINGPower is present inside the UPS cabinet until the upstream input feeder circuit breakers andbattery breakers are opened.NOTE The following instructions are for the Eaton-supplied REPO switch. If acustomer-supplied REPO switch is used, it may not activate in the same manner;refer to the operating instructions provided with the switch.
