UPS INSTALLATION PLAN AND UNPACKINGEaton 9395 UPS (225–275 kVA) Installation and Operation Manual 164201683 Rev 3 www.eaton.com/powerquality 3-15Bypass and output overcurrent protection and bypass and output disconnect switchesare to be provided by the customer. Module Output Breakers (MOBs) are to beprovided by the customer. Table 3‐14 lists the recommended rating for bypass,output, and MOB circuit breakers.Table 3‐14. Recommended Bypass, Output, and MOB Circuit Breaker RatingsUPS ModelBypass, Output, and MOB RatingLoad Rating 400V 480VEaton 9395-275/22580% Rated 450A 350A100% Rated 350A 300AEaton 9395-275/27580% Rated 500A 450A100% Rated 400A 350AThere is no manual DC disconnect device within the UPS.A battery disconnect switch is recommended, and may be required by NEC or localcodes when batteries are remotely located. The battery disconnect switch should beinstalled between the battery and the UPS.External DC input overcurrent protection and disconnect switch for the remote batterylocation is to be provided by the customer. Table 3‐15 or Table 3‐16 lists themaximum rating for continuous‐duty rated circuit breakers satisfying the criteria forboth. Recommended breaker size is based on a maximum full load discharge timeless than 3 hours. For longer discharge times a larger breaker may be required.Table 3‐15. Recommended DC Input Circuit Breaker RatingsUPS ModelInput Rating400V 480VEaton 9395-275/225 600A 600AEaton 9395-275/275 700A 700ATable 3‐16. Recommended DC Input Battery Disconnect Ratings – Separate BatteryUPS ModelInput Rating(each UPM)400V 480VEaton 9395-275/225 600A 600AEaton 9395-275/275 700A 700ABattery voltage is computed at 2 volts per cell as defined by Article 480 of the NEC.Rated battery current is computed at 2 volts per cell.The battery wiring used between the battery and the UPS should not allow a voltagedrop of more than 1% of nominal DC voltage at rated battery current.
