Demand Readings | Schneider Electric PM870, PM820, PM810, PM850

PowerLogicTM Series 800 Power Meter	63230-500-225A2
Chapter 4—Metering Capabilities	3/2011

Demand Readings

The power meter provides a variety of demand readings, including coincident readings and predicted demands. Table 4–2lists the available demand readings and their reportable ranges.

Table 4–2: Demand Readings

Demand Readings	Reportable Range
Demand Current, Per-Phase, 3Ø Average, Neutral
Last Complete Interval	0 to 32,767 A
Peak	0 to 32,767 A

Average Power Factor (True), 3Ø Total
Last Complete Interval	–0.002 to 1.000 to +0.002
Coincident with kW Peak	–0.002 to 1.000 to +0.002
Coincident with kVAR Peak	–0.002 to 1.000 to +0.002
Coincident with kVA Peak	–0.002 to 1.000 to +0.002

Demand Real Power, 3Ø Total
Last Complete Interval	0 to ± 3276.70 MW
Predicted	0 to ± 3276.70 MW
Peak	0 to ± 3276.70 MW
Coincident kVA Demand	0 to ± 3276.70 MVA
Coincident kVAR Demand	0 to ± 3276.70 MVAR

Demand Reactive Power, 3Ø Total
Last Complete Interval	0 to ± 3276.70 MVAR
Predicted	0 to ± 3276.70 MVAR
Peak	0 to ± 3276.70 MVAR
Coincident kVA Demand	0 to ± 3276.70 MVA
Coincident kW Demand	0 to ± 3276.70 MW

Demand Apparent Power, 3Ø Total
Last Complete Interval	0 to ± 3276.70 MVA
Predicted	0 to ± 3276.70 MVA
Peak	0 to ± 3276.70 MVA
Coincident kW Demand	0 to ± 3276.70 MW
Coincident kVAR Demand	0 to ± 3276.70 MVAR

Demand Power Calculation Methods

Demand power is the energy accumulated during a specified period divided by the length of that period. How the power meter performs this calculation depends on the method you select. To be compatible with electric utility billing practices, the power meter provides the following types of demand power calculations:

•Block Interval Demand

•Synchronized Demand

•Thermal Demand

The default demand calculation is set to sliding block with a 15 minute interval. You can set up any of the demand power calculation methods using PowerLogic software.

30	© 2011 Schneider Electric. All Rights Reserved.

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Schneider Electric PM870, PM820, PM810, PM850 manual Demand Power Calculation Methods, Demand Readings Reportable Range

Contents

User Guide Page Hazard Categories and Special Symbols 63230-500-225A2 PowerLogicTM Series 800 Power Meter 2011 PowerLogicTM Series 800 Power Meter 63230-500-225A2 2011 Contents Maintenance and Troubleshooting Waveform CaptureDisturbance Monitoring PM870 Glossary What is a Power Meter? IntroductionTopics Not Covered In This Manual 2011 Introduction Power Meter Hardware Power Meter With Integrated DisplayPowerLogicTM Series 800 Power Meter Introduction 2011 Power Meter Without Display Parts of the Series 800 Power Meter without display Power Meter With Remote Display Parts of the remote display Description Power Meter Parts and Accessories Electric Box Contents Features Series 800 Power Meter FeaturesFirmware PM820 PM850 PM870 Introduction 2011 Schneider Electric. All Rights Reserved Safety Precautions 2011 Safety PrecautionsPage Power Meter Display OperationHow the Buttons Work Changing Values Level Power Meter Setup Setup Mode AccessDate Setup Time Setup Lang Language Setup Comms Communications Setup Meter SetupCTs Setup Communications Default Settings Communications Setting PTs Setup HZ System Frequency SetupSYS System Type Setup Alarm Alarms Setup Input/Output Setup Passw Password Setup Timer Operating Time Threshold Setup Advan Advanced Power Meter Setup FeaturesROT Phase Rotation Setup INC Incremental Energy Interval Setup THD Calculation SetupVAR/PF Convention Setup Lock Resets Setup Alarm Backlight SetupBar Graph Setup PQ Advanced Evaluation Setup Power Demand Configuration Setup Power Meter Resets Initialize the Power MeterAccumulated Energy Readings Reset Accumulated Demand Readings Reset Minimum/Maximum Values ResetDisplay Mode Change Power Meter Diagnostics Accumulated Operating Time Reset View the Meter Information Read and Write RegistersView the Meter Date and TIme Metering Capabilities Real-Time Readings2011 Metering Capabilities One-second, Real-time Readings Reportable Range Power Factor Min/Max Conventions Min/Max Values for Real-time Readings Power Factor Sign Conventions Real Demand Power Calculation Methods Demand ReadingsDemand Readings Reportable Range Sliding Block Fixed Block Demand Current Thermal Demand Example Predicted demand is updated every second Predicted DemandPeak Demand Generic Demand Input Metering Demand Pulse hour second Energy Readings Accumulated EnergyAccumulated Energy, Conditional Accumulated Energy, Incremental Configuration Energy-Per-Shift PM810 with PM810LOGEnergy-per-shift recorded values Category Recorded Values Power Analysis Values Values -3 to Default Fundamental Voltages per phase Fundamental Currents per phaseTHD-Voltage, Current Miscellaneous Input/Output Capabilities Digital Inputs Normal Demand Mode External Synch Pulse Demand Timing Demand Synch Pulse InputRelay Output Operating Modes Normal End Of Power Demand Interval LatchedTimed Absolute kWh Pulse Wire Pulse Initiator Solid-state KY Pulse OutputKWh Out Pulse KVARh Out Pulse Fixed Pulse Output Calculating the Kilowatthour-Per-Pulse Value Analog Inputs Analog Outputs= 0.1111 kWh/pulse Alarms Basic AlarmsBasic Alarm Groups 2011 Alarms Setpoint-driven Alarms EV2Max2EV1Max1 Max2 Viewing Alarm Activity and History PrioritiesTypes of Setpoint-controlled Functions Schneider Electric. All Rights Reserved Scale Factors Scale Groups Measurement Range Scale Factor Scaling Alarm Setpoints Alarm Conditions and Alarm NumbersScale Group Register Numbers Limit Standard Speed Alarms 1 Second Digital Standard Speed Advanced Alarms Advanced Alarm GroupsAdvanced alarm features by model PM850 PM870 Alarm Levels Abbreviated Test Display Name Register Nand Logging Introduction2011 Logging Alarm Log Maintenance LogAlarm Log Storage Memory Allocation for Log Files Value Stored Number Data Logs Registers Alarm-driven Data Log Entries Billing LogOrganizing Data Log Files PM850, PM870 Data LogPage Configure the Billing Log Logging Interval 2011 Logging Billing Log Register List DescriptionData Type➀ Page Waveform Capture Waveform Capture2011 Waveform Capture Number Channels How the Power Meter Captures an Event Channel Selection in PowerLogic SoftwareWaveform Storage Initiating a Waveform 63230-500-225A2 PowerLogicTM Series 800 Power Meter 2011 Disturbance Monitoring PM870About Disturbance Monitoring Transformer Plant C Plant D Fault Plant aPlant B 63230-500-225A2 PowerLogic TM Series 800 Power Meter 2011 Capabilities of the PM870 During an EventPage Maintenance and Troubleshooting Power Meter MemoryDate and Time Settings Identifying the Firmware Version, Model, and Serial Number Viewing the Display in Different LanguagesTechnical Support Troubleshooting Heartbeat LED CT and PT ratings, System Type, Nominal Using This Appendix What is Normal? Section I Common Problems for 3-Wire and 4-Wire Systems Section I-Case aSection I-Case B Section I-Case C Section II 3-Wire System Troubleshooting Section III 4-Wire System Troubleshooting Section III-Case aSection III-Case B Section III-Case C Section III-Case E Section III-Case FSection III-Case G Readings from a 4-wire system Troubleshooting DiagnosisField Example Register List Access Appendix B-Register ListAbout Registers Floating-point Registers How Signed Power Factor is Stored in the Register How Date and Time are Stored in RegistersTable B-1 Date and Time Format Table B-2 Date and Time Byte Example Supported Modbus Commands Resetting RegistersTable B-3 Modbus Commands Table B-4 Register Listing-Reset Commands Schneider Electric All Rights Reserved Appendix C-Using the Command Interface Overview of the Command Interface Issuing Commands Table C-2 Command CodesCommand Resets Files Operating Outputs from the Command Interface Setup9020 None Enter into setup mode 9021 8001 Exit setup mode and save all changes Conditional Energy To save the changes, write the value 1 to register Command Interface Control Incremental EnergyDigital Input Control Using Incremental Energy Figure C-2 Incremental energy example Setting Up Individual Harmonic Calculations Changing Scale Factors Enabling Floating-point RegistersPage Appendix D-Advanced Power Quality Evaluations Power Quality StandardsSEMI-F47/ITI Cbema Specification Table D-2 Duration categories Appendix D-Advanced Power Quality Evaluations PowerLogicTM Series 800 Power Meter 63230-500-225A2Table D-3 Categorized disturbance levels F-47 Sag levels Table D-4 Duration categories EN501602000 Specification How Evaluation Results Are ReportedTable D-6 Register Entries Description Number Possible Configurations Through Register Writes Power FrequencyEvaluation During Normal Operation1 Supply Voltage Variations Evaluations During Abnormal Operation Supply Voltage UnbalanceHarmonic Voltage Count of Magnitude of Rapid Voltage Changes Detection of Interruptions of the Supply Voltage Table D-8 Voltage dip classificationsTable D-9 Voltage interruptions Duration t seconds Table D-10 Over-voltages Duration t seconds Operation with PQ Advanced Enabled Resetting StatisticsHarmonic Calculations Time Intervals 100 Schneider Electric. All Rights Reserved Portal Registers Table D-12 Portal Register Descriptions Size Data101 Detection and Classification of Supply Voltage Dips on Detecting and Classifying Temporary Power Frequency Over 102 Schneider Electric. All Rights Reserved 103 Setting Up PQ Advanced Evaluation from the Display Alarms Allocated for PQ Advanced Evaluations Glossary Terms63230-500-225A2 3/2011 105 106 Schneider Electric. All Rights Reserved Abbreviations and Symbols 2011 Glossary107 108 Schneider Electric. All Rights Reserved PowerLogicTM Series 800 Power Meter Index Index63230-500-225A2 3/2011 109 110 PLC 111 VAR 112Page PowerLogic Power Meter 800 User Guide