9355 UPS

The Eaton 9355 UPS is a three-phase double-conversion online uninterruptible power supply. The unit is also known as the Powerware 9355. The 9355 UPS provides backup power protection for critical loads in data centers and other facilities. The system is designed in a tower form factor and is available in power ratings from 10 kVA to 30 kVA. The 9355 UPS includes internal batteries, an integrated power distribution module, and a maintenance bypass switch.^{[3][2][4][1][5]}

The 9355 UPS uses double-conversion topology, meaning the incoming AC power is rectified to DC and then inverted back to clean AC power, isolating connected equipment from all common electrical disturbances. The unit continuously monitors incoming power and corrects surges, sags, spikes, and other irregularities. Internal batteries provide emergency power during brownouts and blackouts. The UPS employs Advanced Battery Management (ABM) technology with a three-stage charging technique to extend battery life. Temperature-compensated charging adjusts the charge rate based on battery temperature. The system can parallel up to four 9355 UPS units using Eaton's Powerware Hot Sync technology for additional capacity or redundancy. Hot Sync enables wireless paralleling even if communications fail.^[2][1]

The 9355 UPS includes a graphical LCD with a blue backlight that displays load status, events, measurements, and settings. The unit has four LEDs for notice and alarm, audible alarms, and communication ports including RS-232, relay contact, REPO, and environmental inputs. The UPS self-diagnoses by constantly monitoring voltage, temperature, and internal components. If a problem is detected, the unit automatically transfers the power path to a bypass source with no interruption.^[1]

The 9355 UPS is installed between the facility's utility power and sensitive electronic equipment to ensure clean, uninterrupted power. In a data center or server room, the UPS protects servers, networking devices, and storage systems from power anomalies. The unit can be placed at the end of a row of racks (end-of-row configuration) and supplies power to downstream power distribution units or directly to equipment. The internal batteries and integrated power distribution module reduce the need for external battery cabinets and additional power strips, simplifying installation.^[2][1]

The 9355 UPS is intended for corporate data centers, telecom and networking environments, healthcare facilities, banking systems, industrial settings, and retail operations. The system provides backup power for IT infrastructure, electrical engineering equipment, and other critical systems. UL 924 emergency lighting models are also available.^[2][4][1]