POWER WIRING INSTALLATION NOTES081505C164201535---5 10 of 17DESCRIPTION:DATE:DRAWING NO: SHEET:REVISION:Installation InformationA-20 EATON Powerware® 9390 UPS (40–80 kVA) Installation and Operation Manual S 164201535 Rev E powerware.com18. Bypass and output overcurrent protection and bypass and output disconnect switches areto be provided by the user. Table M lists the maximum rating for bypass and output circuitbreakers satisfying the criteria for both.Table M. Maximum Bypass and Output Circuit Breaker RatingsUPS Model Output Voltage Rating208V/220V 480VPowerware 9390---40/40Powerware 9390---80/4080% Rated 175A 70A100% Rated 150A 60APowerware 9390---80/50 80% Rated 225A 100A100% Rated 175A 80APowerware 9390---80/60 80% Rated 250A 125A100% Rated 200A 90APowerware 9390---80/80 80% Rated 350A 150A100% Rated 300A 125A19. There is no DC disconnect device within the UPS.20. A battery disconnect switch is recommended, and may be required by NEC or local codeswhen batteries are remotely located. The battery disconnect switch should be installedbetween the battery cabinet and the UPS.C A U T I O NEvery battery cabinet must have a UVR-type DC circuit breaker with an auxiliary contact.Failure to use this type of circuit breaker may cause severe damage to the UPS and create apersonnel hazard. Note that all battery cabinets provided by the UPS manufacturer have thiscircuit breaker as a standard feature.21. External DC input overcurrent protection and disconnect switch for the remote batterylocation is to be provided by the user. Table N lists the maximum rating for continuous-dutyrated circuit breakers satisfying the criteria for both.Table N. Maximum DC Input Circuit Breaker RatingsUPS Model Input Voltage Rating208V/220V 480VPowerware 9390---40/40Powerware 9390---80/40 150A 150APowerware 9390---80/50 200A 200APowerware 9390---80/60 250A 250APowerware 9390---80/80 300A 300A22. Battery 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.23. The battery wiring used between the battery and the UPS should not allow a voltage dropof more than 1% of nominal DC voltage at rated battery current.
