Introduction1-4 Eaton 93PM UPS (20–100 kW, 480V – 100 kW Frame) Installation and Operation Manual P-164000227—Rev 6 www.eaton.com/powerquality1.1.8 Advanced Battery ManagementAdvanced Battery Management (ABM) technology uses sophisticated sensing circuitry and a three-stagecharger. The charger is a high-frequency, IGBT-based power conversion stage that extends the useful servicelife of UPS batteries by isolating the battery from the electrical environment, except for periodic charging orreserve mode operation. ABM also protects batteries from damage due to high current charging and inverterripple currents. Charging at high currents can overheat and damage batteries.ABM extends battery life by keeping the batteries charged and performing periodic battery testing. The batterytest checks the batteries by transferring to battery mode. During the test the battery voltage is constantlymonitored to determine Battery Health. ABM is intended for VRLA style batteries.An ABM charging cycle starts with the charger driving the battery voltage at maximum current limit, to a batterycharge level of 2.30 volts/cell. The time it takes for the voltage to reach to the battery charge level is saved asthe battery charge time. If the battery charge time exceeds 24 hours, an alarm sounds.When the battery reaches the float level, the battery is charged at the float level for 48 hours. Due to chargercapability, some battery cabinet configurations extend float level to 72 hours. Twenty-four hours into the floatperiod, a series of battery tests are performed to check the battery health. The float level charge continues aftera successful test.After initial startup, the battery run time on the front panel display indicates two minutes. After the 24-hour floatcharging period and automated battery testing, the actual battery run time is determined and the actual batteryrun time is displayed.After the float period is completed, the charger is disconnected and the batteries are allowed to rest for 672hours (28 days) maximum rest time. If the battery voltage falls below the opportunity charge level of 2.1V/cellduring the first 240 hours (10 days) of the rest period, an alarm sounds.An ABM charge cycle is initiated whenever one of these four conditions occurs since the last charge cycle:l The batteries have rested over the maximum rest time of 672 hours.l Accumulated discharge time is over a maximum battery discharge time of 20 seconds.l Battery voltage is under the opportunity charge level of 2.1 volts/cell and the cabinet has been in rest modefor longer than 240 hours.l A SHUT command or manual front display command Initiates Battery Test.1.2 Options and AccessoriesContact an Eaton sales representative for information about the following options.1.2.1 Integrated Battery CabinetBattery backup protection with additional runtime can be provide by equipping the UPS system with up to fourIntegrated Battery Cabinets (IBCs) containing sealed lead-acid, maintenance-free batteries. The IBCs arehoused in single, free-standing cabinets designed for line-up-and-match installation, but may be installedseparate from the UPS cabinet. An external battery disconnect switch or tie point must be used when three orfour IBCs are located separate from the UPS cabinet. The IBCs may be installed on either the right or left sideof the UPS cabinet. The recommended installation location for adjacent battery cabinets is on the right side ofthe UPS cabinet.1.2.2 Integrated Accessory Cabinet-DistributionThe Integrated Accessory Cabinet-Distribution (IAC-D) provides power distribution with up to 2 42-poledistribution panels or up to five 3-pole 100- 250A adjustable subfeed breakers. The IAC-D is housed in a single,free-standing cabinet designed for line-up-and-match installation, but may be installed separate from the UPScabinet. The recommended installation location for an adjacent IAC-D is to the left of the UPS cabinet.
