Output current See Tables 15: Rated and maximum currents forrated power and voltage (93PS), 16: Rated andmaximum currents for rated power and voltage(91PS 3:1) and 17: Rated and maximum currents forrated power and voltage (91PS 1:1)Overload capability at ambient 40 °C (in thedouble conversion mode)102 – 110 % rated power for 10 min111 – 125 % rated power for 60 s126 – 150 % rated power for 10 s> 150% rated power for 300 msOverload capability at ambient 40 °C (in thestored energy mode)102 – 110 % rated power for 10 min111 – 125 % rated power for 60 s126 – 150 % rated power for 10 s> 150% rated power for 300 msOverload capability at ambient 40 °C (in thebypass mode)Continuous ≤ 125% loadTransient ≤ 1000% RMS current for 20 msNOTE: Bypass fuses may limit the overloadcapability.Load power factor (rated) Nominal 1.0Load power factor (permitted range) From 0.8 lagging to 0.8 leadingMax ambient temperature without de-rating 40 °C99..55 UUPPSS eennvviirroonnmmeennttaall ssppeecciiffiiccaattiioonnssTable 26. UPS environmental specificationsAcoustic noise at 1 m < 54 dbA in double conversion< 47 dBA in ESSAmbient UPS storage and transportationtemperature rangeUPS: From -25 °C to +55 °C in the protectivepackageInternal and external VRLA battery: From -25 °Cto +25 °C in the protective package*Ambient operating temperature rangeRecommended range*From 0 °C to +40 °CFrom +20 °C to +25 °CRelative humidity rangeRecommended range*From 5 to 95%, no condensation allowedFrom 20 to 60%Maximum rate of temperature change** 1.67 °C / 5 minMaximum service altitude 1,000 m (3,300 ft) above sea level at ratedmaximum ambient temperatureMaximum 2,000 m (6,600 ft) with 1% derating pereach additional 100 m above 1,000 m.EATON 91PS/93PS UPS USER’S AND INSTALLATIONGUIDEP-164000672 - 005 2023 www.eaton.eu 8833