784. Wiring for AC CableThis chapter is introduce how to wiring AC IN/OUT cable to UPS in diffirencemodes, and UPS connecting with EBM。Before wring UPS, upstream breaker and backfeed contactor shoud beconfigured to avoid power backfeed to unity. And,“backfeed voltage danger”warning lable should be added in backfeed contactor or device. Beforeoperating, UPS input should cut off, and check all terminals voltage to avoidvoltage dangerous. Backfeed contactor rating current should be larger thanUPS rating input current. Below figures show the wiring system of UPS input.Single phase systemThree phase system

Eaton 9SX Series Manual