Installing A Remote Emergency Power-Off - Eaton BladeUPS User Manual

Installing a Remote Emergency Power-off

The REPO is used to shut down the MBM bypass from a distance. When the REPO is activated, the MBM
opens the Bypass breaker and removes power from the critical load if the MBM is in Bypass mode. If the MBM
is in Normal mode, the load will continue to be powered by the UPS. To remove power from the load, the REPO
connected to the UPS must be activated.
The REPO switch must have a minimum rating of 250 Vac at 20 mA and be a normally-open
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latching-type switch not tied into the BladeUPS REPO or any other circuit.
120 Vac is present on the LV model REPO connections and 230 Vac is present on the HV model
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REPO connections.
The REPO switch wiring must be in accordance with National Electrical Code (NEC) Article 725
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Class 2 requirements. The wire should be rated at 600V, 1A minimum and 12 AWG maximum.
To ensure the UPS stops supplying power to the load during an emergency and when the MBM
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is in Normal mode of operation, the emergency power-off function on the UPS must be
activated.
NOTE 1 The REPO for the UPS must not be combined in the same circuit as the circuit for the
MBM REPO or damage to the UPS will result. If connecting to a single EPO button, use
fully isolated contact hubs on the EPO switch.
NOTE 2 For Europe, the emergency switch requirements are detailed in Harmonized document
HD-384-48 S1, "Electrical Installation of the Buildings, Part 4: Protection for Safety,
Chapter 46: Isolation and Switching. "
To install a REPO switch for an MBM:
1. Verify the UPS is turned off and all power sources are removed. Refer to the operation chapter of the
BladeUPS user's guide for shutdown instructions.
2. Verify all power sources are removed from the MBM.
3. Securely mount the REPO switch. Recommended locations include near operator's consoles or near exit
doors. Refer to the REPO switch manufacturer's installation instructions for enclosure dimensions and
wiring knockouts.
4. Remove the screws securing the MBM rear panel (see Figure 9 on page 16) and remove the panel to gain
access to the terminals. Retain the hardware for later use.
5. If necessary, remove the MBM top rear panel (see Figure 11 on page 19). Slide the panel back to remove.
The rear panel must be removed first.
6. Route the REPO wiring through either the top or bottom of the cabinet to the MBM REPO terminals. Use
conduit between the REPO switch and the MBM. See Figure 15 on page 23 for terminal block location.
NOTE Each conduit landing plate can accept two 3" conduit fittings.
Eaton BladeUPS Maintenance Bypass Module (MBM) User's Guide 164201785—Rev 2 www.eaton.com/powerquality
CAUTION
Communication
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