・DemandItem Unit Display data rangePresent demand *1Active W0.000k to 999.9M Present valueMax. demandReactive varApparent VAActive (export) WReactive (export) varCurrent A* Please use this demand function as your standard.The demand value calculated with this function is not guaranteed.Eco-POWER METER defines as below.THD(total harmonicdistortion)Ratio of harmonic distortion (voltage or current) for the fundamental frequency.Lower the value shows that the distortion is less.HarmonicsSinusoidal wave other than fundamental frequency.It has frequency that is whole-number multiple of the fundamental frequency.The frequency that has2 times frequency (halfwavelength) is called 2nd-orderharmonics.VoltageunbalancingThe different between each phase-voltage due to the load unbalancing.It is calculated as below.|Max. (Min.) voltage of all phase－average voltage| ×100 (%)Average voltageCurrentunbalancingThe difference between each-phase current due to the load unbalancing.It is calculated as below.|Max. (Min.) current of all phase－average current| ×100 (%)Average currentPowerinterruption Voltage under 5% of rating is kept 5ms or more,Under voltage Set the ratio for the rated voltage and it is used for threshold.Voltage under the set ratio is kept 5ms or more, it will judge as under voltage.Under current Set the ratio for the rated current and it is used for threshold.Current under the set ratio is kept 5ms or more, it will judge as under current.Over current Set the ratio for the rated current and it is used for threshold.Current over the set ratio is kept 5ms or more, it will judge as over current.Demand byIEC61557-12Based on IEC61557-12 Performance measuring and monitoring devices (PMD)Sliding block intervaldemandIt calculates by measured power via CT with setting interval.Set power interval by 1 to 60(min.) (every 1-min.). It calculates demandduring latest finished interval and displays.One interval is started every setting time.fixed block intervaldemandIt calculates by measured power via CT with setting interval.Set power interval by 1 to 60 (min.) (every 1-min.) It calculates demandduring latest finished interval and displays. After oneinterval finishes, thenext interval starts.Current demandIt calculates based on a thermal demand meter.It measures an average current (current demand) within setting interval andthe max. value is considered as max. current demand.Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com
