Eaton SC300 Operation Handbook

Contents

SC300 Handbook36 Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.IPN 997-00012-03 B2 Issue B2 July 2018ConfigurationSet the following parameters.Parameter Description Where to find:Cells Per String The number of 2V cells per battery string (forexample: 24 in a 48V nominal system).SC300: Battery > BatteryWeb: BatteriesSlope Bus voltage adjustment rate. Use the valuerecommended by the battery manufacturer. SC300: Control Processes >Temp. Compensation >EnableDCTools/Web: ControlProcesses > TemperatureCompensationReference Temp The temperature where no voltage adjustment isapplied. Refer also to Float Voltage on page 27.Upper Limit No additional voltage adjustment is made abovethis temperature.Lower Limit No additional voltage adjustment is made belowthis temperature. If Low Float Tracking is enabled, the Low Float alarm threshold will be decreased by the sameamount as the temperature compensation offset. This occurs only when temperaturecompensation decreases bus voltage. There is no effect when temperature compensation increasesbus voltage. If High Float Tracking is enabled, the High Float alarm threshold will be increased by the sameamount as the temperature compensation offset. This occurs only when temperaturecompensation increases bus voltage. There is no effect when temperature compensation decreasesbus voltage.Peak Load Reduction (PLR)PLR provides a means for a telecom network operator to reduce power consumption at certaintimes by running on battery rather than AC power. An operator may run on batteries duringperiods of high AC power grid loading, and receive direct payments from AC grid operators, orreduced power charges. The SC300 is compatible with demand response programmes, eithermanually controlled, or automatically controlled by software such as Eaton EDREM.While PLR is active, the SC300 turns down the rectifier voltage to just below the DC bus voltage.The batteries will discharge into the load, while the rectifiers provide a backup if the battery fails.PLR may be set to ensure that the battery voltage does not drop below a preset voltage, the LowVoltage Limit. This ensures the battery is not discharged so low that its life is significantly reduced.If the Low Voltage Limit is reached, the SC300 maintains the bus voltage at that value by holdingthe rectifier voltage so that it progressively takes more load as the battery discharges.There is also an option to start a generator to recharge the battery once the Low Voltage Limit isreached.