Eaton 93PM Series - Page 48

36 Eaton 93PM UPS 480V Three-Wire – 100 kW Frame Installation and Operation Manual 164000227—Rev 07
• Use twisted-pair wires for each input and return or common.
• All interface wiring and conduit is to be supplied by the customer.
• When installing external interface wiring between a building alarm, relay output, battery breaker trip, or
Minislot and the UPS interface terminals, conduit must be installed between each device and the UPS
cabinet.
• If using conduit, install the interface wiring in separate conduit from the power wiring.
• All building alarm inputs require an isolated normally-open contact or switch (rated at 24 Vdc, 20 mA
minimum) connected between the alarm input and common terminal. All control wiring and switch
contacts are customer-supplied.
• LAN and telephone drops for use with Minislot connectivity cards must be supplied by the customer.
• The UPS battery detect signal wiring from a UPS building alarm must be connected to the battery
disconnect device.
• Program the battery detect building alarm to read battery open and for normally open contacts.
• A supplemental 48 Vdc shunt trip signal for the battery disconnect device is provided, but is not required
for normal operation.
• Battery detect and 48 Vdc shunt trip wiring should be a minimum of 18 AWG.
• The REPO feature opens all switchgear in the UPS cabinet and isolates power from your critical load. Local
electrical codes may also require tripping upstream protective devices to the UPS.
• The REPO switch must be a latching-type switch not tied to any other circuits.
• A jumper wire must be connected between pins 3 and 4 on the REPO terminal block if using a normally-
closed REPO switch.
• REPO wiring should be a minimum of 18 AWG and a maximum of 16 AWG.
• The REPO switch wiring must be in accordance with NEC Article 725 Class 2 requirements.
• The maximum distance between the REPO and the UPS cannot exceed 150m (500 ft).
• Alarm relay contacts have a maximum current rating of 5A and a switched voltage rating of 30 Vac or 28
Vdc.
• Alarm relay wiring should be a minimum of 18 AWG (recommended 18 AWG).
UPS Installation Plan and Unpacking