ABB CMS-700 User Manual

Also see for CMS-700: Manual

Contents

12CMS-700 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)—Measurements and Events definition—Principle of measurementThe principle of measurement for AC of the CMS-700 control unit includes measurement on themains and branches. On the mains side, all values are measured directly. On the branches, current ismeasured while voltage, power factor as well as active power and energy are calculated usingmeasured mains values.For further information, please refer to the following tableMains Branches/SensorsMeasurement ofI MAINS (Current) [A] I TRMS , I AC , I DC (Current TRMS, AC, DC) [A]Measured mains values used for calculationU MAINS (Voltage) [V] U MAINS (Voltage) [V]PF (Power Factor) PF (Power Factor) (manual configuration is possible)THD (Voltage, Current) (%)Calculation ofPower:– active [W]– apparent [VA]– reactive [var]P SENS (Active power) [W]P SENS = U MAINS · I AC · PFEnergy [kWh] Energy SENS [kWh]Attention: Referring to thediagram in the figure aside,please note that N on thesupply has to be connectedin order to avoid damageof the device. Twistingthe phase and neutralcan damage the device.Voltage-InputSupply & MeasurementSMS-Bus,3 x32 SensorsBranchesCMS-BusFlat CableMains BranchesSensorsCMS 700CT-InputCurrent MeasurementL1/SupplyL2L3N/SupplyI1ABABABABI2I314/N