Schneider Electric PM5300 manual Demand, Power demand calculation methods, Ieee mode

Page 79

PowerLogic™ PM5300 series user guide

Chapter 9—Measurements and calculations

 

 

IEEE mode

In IEEE mode, the PF sign is determined by the type of load (inductive or capacitive) contributing to the reactive power component of apparent power. PF sign is positive (+) for capacitive loads (leading power factor). PF sign is negative (-) for inductive loads (lagging power factor).

Related topics

•To change the HMI mode, see “Setting up regional settings” on page 39.

•To learn how the meter calculates power factor, see “Power factor” on page 77.

Demand

Demand is a measure of average consumption (typically power or current) over a fixed programmed time interval.

The meter measures instantaneous consumption and can calculate demand using various methods.

Related topics

•For instructions on configuring demand using the front panel, see “Demand setup” on page 43

Power demand calculation methods

Power demand is calculated by dividing the energy accumulated during a specified period by the length of that period. How the power meter performs this calculation depends on the method and time parameters you select (for example, timed rolling block demand with a 15-minute interval).

To be compatible with electric utility billing practices, the power meter provides the following types of power demand calculations:

•Block interval demand

•Synchronized demand

•Thermal demand

You can configure the power demand calculation method from the front panel or using

ION Setup.

Block interval demand

For block interval demand method types, you specify a period of time interval (or block) that the power meter uses for the demand calculation. Select/configure how the power meter handles that interval from one of these different methods:

•Timed Sliding Block: Select an interval from 1 to 60 minutes (in 1-minute increments). If the interval is between 1 and 15 minutes, the demand calculation updates every 15 seconds. If the interval is between 16 and 60 minutes, the demand calculation updates every 60 seconds. The power meter displays the demand value for the last completed interval.

•Timed Block: Select an interval from 1 to 60 minutes (in 1-minute increments). The power meter calculates and updates the demand at the end of each interval.

•Timed Rolling Block: Select an interval and a subinterval. The subinterval must divide evenly into the interval (for example, three 5-minute subintervals for a

15-minute interval). Demand is updated at the end of each subinterval. The power meter displays the demand value for the last completed interval.

© 2014 Schneider Electric All Rights Reserved

79

Page 78 Page 80
Image 79
Page 78 Page 80
Contents PowerLogic PM5300 Series Power and Energy Meter Page Please note Important InformationPage Ence Introduction Chapter Safety Precau TionsHardware Refer Chapter Input / Output Chapter AlarmsChapter Multi-tariff feature Chapter Power qualityChapter Verifying accura Chapter Meter resetsChapter Maintenance UpgradesPowerLogic PM5300 series user guide Introduction Power and Energy Meter HardwareParts and Accessories Box ContentsPowerLogic PM5300 user guide Before You Begin Safety PrecautionsPowerLogic PM5300 series user guide Functions and Characteristics Models, Features and OptionsFunctions and Characteristics PM5300 Series Models, Features and OptionsOther Measurements Power Quality MeasurementsEnergy Values Demand ValuesElectrical Characteristics Technical SpecificationsElectromagnetic Compatibility Mechanical CharacteristicsEnvironmental Characteristics SafetyDimension Safety precautionsHuman Machine Interface Mounting the PM5300 Meter mountingMeter wiring Screw driver type M3 Serial No Description SpecificationMake Part code Description Recommended cablesWiring Diagrams Direct connect voltage limits Power systemSymbol Description Current Transformer Voltage disconnect switchMeter setting Power system setup parameters Power system descriptionSymbol Direct connect maximum Voltage and current input wiringVoltage input protection Current input protectionSerial communications Control power wiringCommunications Balanced system considerationsRS-485 maximum cable length RS-485 wiringRS-485 network configuration RS-485 cableEthernet communications Ethernet configurationEthernet wiring EthernetETHERNET SwitchSWITCH/ hub/ HUB Digital outputsStatus input connections Status inputsRelay outputs Digital output connectionsRelay output connections Heartbeat / communications LED Front panel display and meter setupLED indicators Alarm / energy pulsing LED modesMeter screen menus Notification iconsRelated topics PM5300 display screen menus Menu treeBasic setup screen Front panel meter setupMeter setup screen navigation Configuring the basic setup parametersBasic setup parameters Basic setup menu treeParameter Values Description Communication ports Communications setupSetting up serial communications Serial communications setup menu treeCommunications setup parameters Setting up Ethernet communicationsEthernet communications setup menu tree Display setup menu tree HMI settingsSetting up the display Ethernet port settingsRegional settings menu tree Setting up the screen passwordsSetting up regional settings Display setup parametersPassword setup menu tree Lost passwordPassword setup parameters Advanced setup menu tree Setting the clock Advanced setupClock setup menu tree Clock setup parametersLED setup parameter Setting up the alarm / energy pulsing LEDAdvanced setup parameters Alarm / energy pulsing LED settings menu treeDemand setup menu tree Input / output setup Demand setupPower or current demand setup parameters Alarms setup Multi-tariff setupRemote Meter Setup Displaying data screens Viewing Meter DataViewing meter data from the front panel Meter data display screensEnergy E Power PQSVolts U-V HarmMnMx AlarmHz F UnbalMaint Using ION Setup to view or modify configuration dataUsing software to view meter data TimerStatus input applications Input / OutputStatus Input, Digital Output Ports and Relay Output Ports Status input setup parameters available through ION Setup Status input setupConfiguring status inputs using ION Setup Navigate to I/O configuration I/O SetupStatus input setup menu tree Configuring status inputs using the front panelDigital output application example Digital output setupDigital output wiring example Digital output applicationsDigital output setup parameters available through ION Setup Configuring digital outputs using ION SetupDigital output setup menu tree Configuring digital outputs using the front panelOn Time s This defines the pulse width on time in seconds Parameter Values Description Relay output applications Relay output setupConfiguring relay outputs using ION Setup Relay output setup parameters available through ION SetupSet to External or Alarm. The relay output Relay output setup menu tree Configuring relay outputs using the front panelAlarm / energy pulsing LED setup Navigate to I/O configuration Energy Pulsing Disabled turns off the LED completely About Alarms AlarmsSecond Alarms Alarm List of Standard 1-Second Over/Under AlarmsHow the power meter handles setpoint-driven alarms Digital AlarmsUsing an Alarm to Control a Relay and Digital Output Alarm SetupUnary Alarms Alarm PrioritiesSetting Up 1-Second Alarms Setting Up 1-Second Alarms Setting Up Unary Alarms Setting Up Digital Alarms Setting Up Digital Alarms Viewing Active Alarms and Alarm Counters Viewing Alarm Activity and HistoryViewing Unacknowledged Alarms and the Alarm History Log PowerLogic PM5300 series user guide Alarms Data Logs Data LogsDescription Number of Registers Data Type Register Number Alarm Log Storage Alarm Log Memory Allocation for Log Files Energy Power factorMeasurements and calculations Real-time readingsPower factor minimum and maximum Power factor min/max conventionPower factor sign convention IEC modeBlock interval demand Power demand calculation methodsIeee mode DemandBlock interval demand example Synchronized demandThermal demand example Current demandPredicted demand Thermal demandPredicted demand example Peak demandMulti-tariff feature example Multi-tariff featureMulti-tariff feature overview Front panel date and time format Command mode overviewTime of day mode overview Time formatTariff Type Start date End date Start time End time Example tariff configurations for a four-tariff systemConfiguration 1 four tariffs with weekdays and weekends Tariff creation methodDigital input requirements for required number of tariffs Input mode overviewConfiguration 1 2 tariff assignment using 2 digital inputs1 Configuration 2 2 tariff assignment using 2 digital inputsTime of day mode tariff setup Configuring tariffs using the front panelConfiguring time of day mode tariffs using the front panel Tariff setup menu treeConfiguring input mode tariffs using the front panel Total Harmonic Distortion and Total Demand Distortion Power qualityHarmonic content calculations Harmonics overviewTDD calculation Viewing harmonics using the front panelDisplaying harmonics data THD and thd calculationsExample 13th to 21st harmonics for line-to-neutral voltage Viewing THD/thd using the front panelPower Quality display screen Viewing TDDRelated topics Verifying accuracy Testing overviewAccuracy test requirements PM5300 Reference device or energy standardEnergy pulsing Location of energy pulsing LEDVerifying accuracy test Percent error calculation Calculating total powerCalculating the number of required pulses VT and CT considerations Total power limit for alarm / energy LEDTotal power limit for digital output Energy pulsing considerationsVar-hour test points example Typical sources of test errorsTest points Watt-hour test points exampleReset menu tree Meter resetsFront panel meter reset screens Global resetsAlarm counter Option Description Single resetsSingle reset options Alarm counter optionsPowerLogic PM5300 series user guideChapter 13-Meter resets 102 Identifying the Firmware Version, Model, and Serial Number Maintenance and UpgradesPassword Recovery Power Meter MemoryMeter Control PowerAdditional Meter Status Information Downloading FirmwareHeartbeat/Comms LED Troubleshooting105 106 TroubleshootingPotential Problem Possible Cause Possible Solution Getting Technical Support Register ListMID compliance for the meter Specifications relevant to MIDMID Compliance MID overviewMID Compliance Installation and wiringLocation of terminal covers Installing the terminal coversPM5331/PM5341 default screen Default PM5331/PM5341 display screenMeter firmware version MID-protected setup parametersLock-protected setup parameters Lock-protected setup parametersInitializing the meter Setting up the PM5331/PM5341Navigate to Maint Setup Meter Lock Setting up lock passwordLocking or unlocking the meter Terms Glossary113 114 115 Abbreviations116 117 118 Page Schneider Electric 35, rue Joseph Monier CS
Top Page Image Contents