UPS Installation Plan and Unpacking3-26 Eaton 93PM UPS (20–100 kW, 480V – 100 kW Frame) Installation and Operation Manual P-164000227—Rev 6 www.eaton.com/powerquality3.2.4 UPS System Interface Wiring PreparationControl wiring for features and options should be connected at the customer interface terminal blocks locatedinside the UPS.WARNINGDo not directly connect relay contacts to the mains related circuits. Reinforced insulation to themains is required.Read and understand the following notes while planning and performing the installation:l Use Class 1 wiring methods (as defined by the NEC) for interface wiring from 30V to 600V. The wire shouldbe rated for 600V, 1A minimum. 12 AWG maximum wire size.l Use Class 2 wiring methods (as defined by the NEC) for interface wiring up to 30V. The wire should be ratedfor 24V, 1A minimum.l Because of the battery shunt trip wiring route in the UPS cabinet, the wire should be rated for a minimum of600V.l Use twisted-pair wires for each input and return or common.l All interface wiring and conduit is to be supplied by the customer.l When installing external interface wiring between a building alarm, relay output, battery breaker trip, orMinislot and the UPS interface terminals, conduit must be installed between each device and the UPScabinet.l If using conduit, install the interface wiring in separate conduit from the power wiring.l All building alarm inputs require an isolated normally-open contact or switch (rated at 24 Vdc, 20 mAminimum) connected between the alarm input and common terminal. All control wiring and switch contactsare customer-supplied.l LAN and telephone drops for use with Minislot connectivity cards must be supplied by the customer.l The UPS battery detect signal wiring from an UPS building alarm must be connected to the batterydisconnect device.l Program the battery detect building alarm to read battery open and for normally open contacts.l A supplemental 48 Vdc shunt trip signal for the battery disconnect device is provided, but is not required fornormal operation.l Battery detect and 48 Vdc shunt trip wiring should be a minimum of 18 AWG.l The REPO feature opens all switchgear in the UPS cabinet and isolates power from your critical load. Localelectrical codes may also require tripping upstream protective devices to the UPS.l The REPO switch must be a latching-type switch not tied to any other circuits.l A jumper wire must be connected between pins 3 and 4 on the REPO terminal block if using anormally-closed REPO switch.l REPO wiring should be a minimum of 18 AWG and a maximum of 16 AWG.l The REPO switch wiring must be in accordance with NEC Article 725 Class 2 requirements.NOTE Refer to the Eaton 93PM Sidecar Integrated Accessory Cabinet-Tie and Tie Bypass(50 kW and 100 kW SIAC-T, and 50 kW and 100 kW SIAC-TB) Installation andOperation Manual, listed in paragraph 1.8, for SIAC-T and SIAC-TB interface wiringpreparation and requirements.
