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Electro-Voice 250, 1252 operation manual Electro Industries/GaugeTech Doc # E107706

Models: 250 1252

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Electro Industries/GaugeTech Doc # E107706 V1.25

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Electro-Voice 250, 1252 operation manual Electro Industries/GaugeTech Doc # E107706

Contents

Nexus 1250 /1252 Electro Industries/GaugeTech Doc # E107706 Nexus 1250/1252 Revision Limitation of Warranty Customer Service and SupportProduct Warranty Statement of CalibrationFutura+ Series Products About Electro Industries/GaugeTechApplications DM Series ProductsElectro Industries/GaugeTech Doc # E107706 Table of Contents Transformer Loss Compensation Communication WiringUsing the Nexus External Displays Nexus Time-of-UseNexus Monitor with Internal Network Option Nexus External I/O ModulesNexus Monitor with INP2 Internal Modem Option FlickerGlossary of Terms Three-Phase System Configurations Chapter Three-Phase Power MeasurementWye Connection Phase-to-Ground Voltage Phase-to-Phase Voltage Three-Phase Delta Winding Relationship Delta ConnectionBlondell’s Theorem and Three Phase Measurement Phase B Phase C Node n Phase a Power, Energy and Demand Power Use Over TimeTime Interval Power kW Energy kWh Accumulated Minute Reactive Energy and Power Factor Energy Use and DemandVoltage and Complex Harmonic Distortion 10 Nondistorted Current Waveform11 Distorted Current Wave Electro Industries/GaugeTech Doc # E107706 Power Quality Cause Disturbance Type SourceElectro Industries/GaugeTech Doc # E107706 Chapter Nexus Overview Nexus SystemFlicker Nexus 1250/1252 Power Quality MonitoringDNP V3.00 Level 1 and Level Nexus 1250/1252 Revenue MeteringDial-In Function Dial-Out FunctionTotal Web Solutions Hardware ConnectionEnter the Domain Name Server and Computer Name Measurements and Calculations Root Mean Square RMS of Currents n = number of samplesReactive Power VAR per phase Power Watts per phaseApparent Power VA per phase Power Watts TotalApparent Power VA Total Reactive Power VAR TotalPower Factor PF Watt hour Wh Phase AnglesTotal Harmonic Distortion %THD VAR hour VARhDemand Integrators Partial = ∑Value Other I/O Accessories Nexus External I/O Modules OptionalNexus 1250/1252 Meter Specifications Specification Nexus MeterNexus P40N, P41N, P43N LED External Display Specifications Nexus P60N Touch Screen Display SpecificationsChapter Hardware Installation Mounting the Nexus 1250/1252 MeterNexus Meter Mounting Diagram, Side View Nexus P40N LED External Display Mounting Diagrams Mounting the Nexus LED External DisplaysMounting the Nexus P60N Touch Screen External Display Connect to NexusCutout for Nexus P60N Touch Screen Display Mounting the Nexus External I/O Modules Nexus I/O Module Communication PortsNexus I/O Modules Mounting Diagram, Front View Electro Industries/GaugeTech Doc # E107706 Chapter Electrical Installation Instrument Power Connections Isolating a CT Connection ReversalWiring Diagrams Figure # Description25 a 25A 4-Wire Wye, 3-Element with 3 PTs and 3 CTs 3-Wire, 2-Element Open Delta with 2 PTs and 3 CTs 3-Wire, 2-Element Open Delta with 2 PTs, 2 CTs 3-Wire, 2-Element Delta Direct Voltage with 3 CTs 3-Phase, 4-Wire Wye, 2.5 Element with 2 PTs, 3 CTs 4-Wire, 3-Element Grounded Delta with 4 CTs G Option Electro Industries/GaugeTech Doc # E107706 Chapter Communication Wiring Communication OverviewRJ-11 Communication with Internal Modem Option MODBUS/TCP IRIG-B Nexus RS-485 Wiring Fundamentals with RT Explanation RS-232 Connection-Nexus Meter to a ComputerWire RS-485 Port For All RS-485 ConnectionsIncorrect Connection T Incorrect Connection StarRS-485 Connection-Nexus Meter to a Computer or PLC Using the Unicom Unicom 2500 with Connections Nexus Meter Port Nexus Meter Port Communication Ports on the Nexus I/O Modules 12 Communication Ports on the Nexus I/O Modules11 RS-485 Connection-Nexus Meter to Nexus I/O Modules 13 Nexus Meter Connected to Nexus I/O ModuleSteps to Determine Power Needed 13 I/O Modules’ Factory Settings and VA RatingsLinking Multiple Nexus Devices in Series 14 Linking Multiple Nexus Devices in SeriesNetworking Groups of Nexus Meters 15 Networking Groups of Nexus MetersRemote Connection-RS-232 RS-485 wiring with a Modem Manager. See sectionRemote Communication Overview Remote Connection-RS-48517 Remote Connections with Internal Modem Option RJ-45MODBUS/TCP over Ethernet Remote Communication-RS-232 Remote Communication-RS-485Programming Modems for Remote Communication Selected Modem Strings Modem String/SettingHigh Speed Inputs Connection Five Modes of Time Synchronization Installation IRIG-B ConnectionsElectro Industries/GaugeTech Doc # E107706 Mode Button LED Display Up/Down ArrowsNexus P40N Modes Connect Multiple DisplaysP41N Dynamic Readings Mode Electro Industries/GaugeTech Doc # E107706 Navigational Map of Dynamic Readings Mode Group 1 Device Time Nexus Information ModeGroup 4 External Display Units Navigational Map of Nexus Information Mode ReadingsGroup 2 Reset Energy Display Features ModeGroup 1 Reset Max/Min Group 8 Display Scroll ON/OFFNavigational Map of Display Features Mode Nexus P60N Touch Screen External Display General Groups of Readings Reset Button View LimitsGeneral page Overview of Real Time Readings Volts Voltage Readings PH-PH Volts Voltage Readings DetailsVolts Voltage Readings PH-N Amps Current Readings DetailsAmps Current Readings A-B-C Real Time Power Real Time Power Readings DetailsDemand Power Demand Power Readings Details Energy Accumulated Energy InformationTOU Register Demand TOU AccumulationsTouch Short Term or Long Term to view other Flicker screens Phasors Phasor Analysis Limits Limit StatusWaveform Real Time Graph Real Time Trending Channel Selector Reset Meter Reset Commands LOG Status Logging StatisticsNexus Port Settings Navigational Map for P60N Touch Screen External Display Chapter Transformer Loss Compensation IntroductionElectro Industries/GaugeTech Doc # E107706 Nexus 1250/1252 Transformer Loss Compensation Loss Compensation in Three Element Installations Three Element Loss Compensation Worksheet Transformer Data from Transformer Manufacturer’s Test SheetBase Conversion Factors Meter/Installation DataLoad Loss at Transformer Normalize Losses to Meter Base Loss Watts Percentage ValuesCalculate Load Loss Values Chapter Nexus Time-of-Use Nexus TOU CalendarUpdating, Retrieving and Replacing TOU Calendars TOU Prior Season and MonthDaylight Savings and Demand Chapter Nexus External I/O Modules I/O Module ComponentsPort Overview Installing Nexus External I/O Modules Nexus Meter Connected to I/O ModulePower Source for I/O Modules Psio Power Source Side View Showing Male RS-485 Side PortUsing Psio with Multiple I/O Modules Steps for Attaching Multiple I/O ModulesFactory Settings and Reset Button Factory SettingsAnalog Transducer Signal Output Modules OverviewNormal Mode Analog Input Modules Normal Mode Digital Dry Contact Relay Output Form C Module Communication Digital Solid State Pulse Output KYZ Module Communication Digital Status Input Module Specifications Chapter Nexus Monitor with Internal Modem Option Nexus with Internal Modem Option10-2 Chapter Nexus Meter with Internal Network Option 11-111-2 11-3 11-4 Chapter Flicker Theory of OperationLong Term Flicker Evaluation Instantaneous Flicker EvaluationShort Term Flicker Evaluation SummaryMeasurement Procedure SetupData available Software User Interface Main screenFrequency TimeStatus Flicker MonitoringLong Term Readings Short Term ReadingsPst Readings Displayed Plt Readings DisplayedPolling LoggingLog Viewer Performance Notes Calculating Values Excel Spreadsheet with Example NumbersElectro Industries/GaugeTech Doc # E107706 Electro Industries/GaugeTech Doc # E107706 Electro Industries/GaugeTech Doc # E107706 Electro Industries/GaugeTech Doc # E107706 Electro Industries/GaugeTech Doc # E107706 Glossary Electro Industries/Gauge Tech Doc # E107706Glossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6