DOCSLIB.ORG

A Ammeter-Voltmeter Method, 292 Ammeter-Wattmeter Method, 293

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A Ammeter-Voltmeter Method, 292 Ammeter-Wattmeter Method, 293 Index A D Ammeter-Voltmeter Method, 292 Delta connection, 26, 27, 29, 64–66, 89, 92, Ammeter-Wattmeter Method, 293 163 Apparent Power, 3 Delta-delta connection, 91 Approximate equivalent circuit, 60 Delta-Delta Connection, 91, 92, 118 Arc suppression coil grounding, 171 Delta-Wye Connection, 90 Artesian water, 204 Delta-wye connection, 90, 93 Autotransformer, 85 Derating factor, 272–274 Average Power, 3 Divergence theorem, 213, 223 Double line to ground fault, 102, 136, 269 B Body current, 270 E Body parts, 194 Earth, 150 Earth resistance, 175 C Efficiency, 76 Cathodic protection current, 154 Electric displacement, 207 Chasis, 154 Electric field, 255 Circular Plate, 191 Electric flux, 207 Circular plate, 192, 195, 196 Electric potential, 176 Clamp-on Method, 288 Electrostatic capacity, 184 Clay, 184, 203, 205, 206, 251 EMF equations, 52 Complex permittivity, 207, 208 Equipotential surface, 184 Complex power, 1, 7, 8, 11, 12, 109 Equivalent circuit of a transformer, 58 Concrete, 204, 208 Conductivity, 212, 277 F Continuity of current, 214 Fall of Potential Method, 281 Copper loss, 7, 76–81 Feet resistance, 269 Corrosion, 251, 277 Feldspar, 205 Current, 210, 215 Fluke 1625, 253 Current density, 177, 210, 215 Foot, 194 Current lines, 178, 180, 191, 215 Footprint, 195 Current transformer, 62, 94, 95, 288 Frozen sand and gravel, 208 Cylindrical Rod, 182 Frozen soil, 209 Cylindrical rod, 182–184, 186, 196, 278 © Springer Science+Business Media Singapore 2016 307 Md.A. Salam and Q.M. Rahman, Power Systems Grounding, Power Systems, DOI 10.1007/978-981-10-0446-9 308 Index G Poisson equation, 219 Gauss’ law, 214, 215 Polarity of a transformer, 62 GMD, 115 Polarization, 207 Grain, 205 Positive sequence, 18 Gravel soil, 205 Positive sequence components, 128 Ground, 268 Positive sequence impedance, 123 Grounded systems, 162 Potential difference, 255 Grounding system, 268 Potential transformer, 94 Ground potential rise, 269 Potentiometer Method, 296 Ground resistance, 175, 269 Power factor, 7 Power factor correction, 1 H Power Factor Measurement, 33 Hemisphere, 177 Power triangle, 13 High resistance grounding, 167 Powerworld, 144 Primary winding, 49 I Ideal transformer, 51 R Impedance triangle, 10 Reactance grounding, 169 Index of refraction, 207 Reactive Power, 7 Instantaneous power, 1 Real power, 8 Iron loss, 76 Reflection factor, 272 Relative permeability, 207 L Remote earth, 269 Laplace equation, 219 Resistance grounding, 167 Leakage flux, 50 Resistivity, 204 Lee’s partitioning method, 261 Resonant grounding, 171 Line-to-line fault, 124 Line voltage, 20 S Low resistance grounding, 167 Salt, 208 Sandy, 205 M Schlumberger method, 265 Maximum grid current, 269 Secondary winding, 49 Mesh Connection, 24 Series resonance, 36 Moisture, 208 Short circuit test, 82 Moraine gravel, 204 Sided Probe System, 263 Mutual flux, 50 Signal, 154 Silt, 205 N Single line to ground fault, 124 Negative sequence, 18 Slope method, 290 Negative sequence components, 103 Soil Interface, 215 Negative sequence impedance, 123 Soil resistance, 203 Soil resistivity, 204 O Solidly grounded system, 163 Open circuit test, 81 Sphere electrode, 179 Star connection, 19 P Step potential, 269 Parallel resonance, 38 Surface of soil, 196 Parameter, 191 Symmetrical components, 102 Permeability, 207 Symmetrical faults, 101 Permittivity, 207 Petersen grounding, 171 T Phase sequence, 18 Three-phase power, 27 Phase voltage, 19 Three-phase transformer, 64 Pipelines, 251 Three-pole method, 280 Index 309 Tolerable step potential, 272 W Tolerable touch potential, 272 Wenner method, 252 Touch potential, 269 Wheatstone bridge method, 293 Transmission tower, 269 Working component, 81 Turns ratio, 53 Working grounding, 163 Two-Pole Method, 251 Wye-delta connection, 89 Two-wattmeter method, 32 Wye-wye connection, 88 U Y Unground delta connection, 158 Y-connected load, 27, 33 Ungrounded systems, 155 Y-connection, 19 Uniqueness theorem, 222 Y-delta connection, 29 Unsymmetrical Faults, 102 Y-Y connection, 28 V Z Vector group, 66 Zero sequence components, 103 Voltage regulation, 73 Zero sequence impedance, 115, 123 Voltage transformer, 155 Zero sequence models, 115 Voltage transformer grounding, 170 Zero sequence reactance, 115 V-V connection, 92.
Load more

Recommended publications
  • 1806-A Electronic Voltmeter, Manual
    OPERATING INSTRUCTIONS TYPE 1806-A ELECTRONIC VOLTMETER Form 1806-0100-C March, 1967 Copyright 1963 General Radio Company West Concord, Massachusetts, USA GENERAL RADIO COMPANY WEST CONCORD, MASSACHUSETTS, USA SPECIFICATIONS DC VO~TMETER Voltage Ro.nge: Four ranges, 1.5, 15, 150, and 1500 V, full scale, positive or negative. Minimum reading is 0.005 V. Input Resistance: 100 M!'l, ±5%; also "open grid" on all but the 1500-V range. Grid current is less than I0-10 A. Accuracy: ±2% of indicated value from one-tenth of full scale to full scale; ±0.2% of full scale from one-tenth of full scale to zero. Scale is logarithmic from one-tenth of full scale to full scale, permitting constant-percentage readability over that range. AC VOLTMETER Voltage Range: Four ranges, 1.5, 15, 150, and 1500 V, full scale. Minimum reading on most sensitive range is 0.1 V. Input Impedance: Probe, approximately 25 Mn in parallel with 2 pF; with TYPE 1806-P2 Range Multiplier, 2500 M!'l in parallel with 2 pF; at binding post on panel, 25 Mn in parallel with 30 pF. Accuracy: At 400 c/ s, ±2% of indicated value from 1.5 V to 1500 V; ±3% of indicated value from 0.1 V to 1.5 V. Waveform Error: On the higher ac-voltage ranges, the instrument operates as a peak voltmeter, calibrated to read rms values of a sine wave or 0.707 of the peak value of a complex wave. On distorted waveforms the percentage deviation of the reading from the rms value may be as large as the percentage of harmonics present.
    [Show full text]
  • The Accuracy Comparison of Oscilloscope and Voltmeter Utilizated in Getting Dielectric Constant Values
    Proceeding The 1st IBSC: Towards The Extended Use Of Basic Science For Enhancing Health, Environment, Energy And Biotechnology 211 ISBN: 978-602-60569-5-5 The Accuracy Comparison of Oscilloscope and Voltmeter Utilizated in Getting Dielectric Constant Values Bowo Eko Cahyono1, Misto1, Rofiatun1 1 Physics Departement of MIPA Faculty, Jember University, Jember – Indonesia, e-mail: [email protected] Abstract— Parallel plate capacitor is widely used as a sensor for many purposes. Researches which have used parallel plate capacitor were investigation of dielectric properties of soil in various temperature [1], characterization if cement’s dielectric [2], and measuring the dielectric constant of material in various thickness [3]. In the investigation the changing of dielectric constant, indirect method can be applied to get the dielectric constant number by measuring the voltage of input and output of the utilized circuit [4]. Oscilloscope is able to measure the voltage value although the common tool for that measurement is voltmeter. This research aims to investigate the accuracy of voltage measurement by using oscilloscope and voltmeter which leads to the accuracy of values of dielectric constant. The experiment is carried out by an electric circuit consisting of ceramic capacitor and sensor of parallel plate capacitor, function generator as a current source, oscilloscope, and voltmeters. Sensor of parallel plate capacitor is filled up with cooking oil in various concentrations, and the output voltage of the circuit is measured by using oscilloscope and also voltmeter as well. The resulted voltage values are then applied to the equation to get dielectric constant values. Finally the plot is made for dielectric constant values along the changing of cooking oil concentration.
    [Show full text]
  • AC & DC True RMS Current and Voltage Transducer Wattmeter
    AC & DC true RMS current and voltage transducer Wattmeter, Voltmeter, Ammeter,…. Type CPL35 • Continuous or alternative RMS measures: Single-phase or balanced three-phase 0...440 Hz PWM, wave train, Phase angle variation, AC All high level harmonics signals • multi-sensor for current measurement: Shunt, transformer, Rogowski coil, Hall effect sensor or direct input 1A/ 5A • Programmable: Voltmeter, ammeter, wattmeter, varmeter, power factor, Cos phi, frequency meter • 4 digits measure display U, I, Cos, P, Q, Hz DC+AC • Up to 2 isolated analog outputs and 2 relay outputs • Wide range universal ac/dc power supply The CPL35 is a converter for measuring, monitoring and retransmission of electrical parameters. Implementa- tion is fast by simple configuration of transformer ratio or shunt sensitivity. The various output options allow a wide range of application: measurement, protection, control. Measurement: Block diagram: - DC or AC, single-phase or balanced three-phase network (configurable TP, CT ratio or shunt sensitivity), - 2 voltage calibers: 150V, 600V others on request up to 1000V, - 3 current calibers: 200mV (external shunt) ,1A or 5A internal shunt, - Hall effect current sensor (+/-4V input) - active (P), reactive (Q), apparent (S) powers, - cos (power factor) , frequency 1Hz…..440 Hz, - configurable integration time from 10 ms to 60 seconds for the measurement in slow waves train applications. Front face: - 4 digit alphanumeric LED matrix display for the measurement, - 2 red LEDs to display the status of relays, - 2 push buttons for: * The complete configuration of the device * Selecting the displayed value (U, I, Cos, P, Q, S, Hz) * Setting of alarm thresholds, ....... Relays (/R option): Up to 2 configurable relays: - In alarm, monitoring measure selection (U, I, Cos, P, Q, S, Hz), - Threshold, direction, hysteresis and delay individually adjustable on Associated current sensors each relay (on & off delay), shunt current transformer Hall effect sensor Rogowski coil - HOLD function (alarm storage with RESET by front face).
    [Show full text]
  • Equivalent Resistance
    Equivalent Resistance Consider a circuit connected to a current source and a voltmeter as shown in Figure 1. The input to this circuit is the current of the current source and the output is the voltage measured by the voltmeter. Figure 1 Measuring the equivalent resistance of Circuit R. When “Circuit R” consists entirely of resistors, the output of this circuit is proportional to the input. Let’s denote the constant of proportionality as Req. Then VRIoeq= i (1) This is the same equation that we would get by applying Ohm’s law in Figure 2. Figure 2 Interpreting the equivalent circuit. Apparently Circuit R in Figure 1 acts like the single resistor Req in Figure 2. (This observation explains our choice of Req as the name of the constant of proportionality in Equation 1.) The constant Req is called “the equivalent resistance of circuit R as seen looking into the terminals a- b”. This is frequently shortened to “the equivalent resistance of Circuit R” or “the resistance seen looking into a-b”. In some contexts, Req is called the input resistance, the output resistance or the Thevenin resistance (more on this later). Figure 3a illustrates a notation that is sometimes used to indicate Req. This notion indicates that Circuit R is equivalent to a single resistor as shown in Figure 3b. Figure 3 (a) A notion indicating the equivalent resistance and (b) the interpretation of that notation. Figure 1 shows how to calculate or measure the equivalent resistance. We apply a current input, Ii, measure the resulting voltage Vo, and calculate Vo Req = (1) Ii The equivalent resistance can also be measured using and ohmmeter as shown in Figure 4.
    [Show full text]
  • Energy and Power Meters Catalogue for Panel Builders
    Schneider Electric Energy and power meters catalogue for Panel Builders www.schneider-electric.com Schneider Electric Energy and power meters catalogue for panel builders Contents Introduction 3 Selection guide panorama 4 Current transformers 7 Panel instruments 18 Basic energy metering IEM2000 series, IEM3000 series 29 Basic multi-function metering PM3000 series, PM5000 series 43 Communications and gateways Link150, Com’X 200, Com’X 210, Com’X 510 59 Commercial reference numbers See your Schneider Electric representative for complete ordering information. 76 Clicking on a Commercial Reference Number or scanning the product’s QR Code links you to further product information on www.schneider-electric.com www.schneider-electric.com PANEL BUILDERS CATALOGUE FUNCTIONS AND CHARACTERISTICS Why Panel Builders Choose Schneider Electric? Schneider Electric is the global specialist in energy management and as such it has the most complete power motoring product line, going from simple indicators (analogue meters) and CTs, to world class accurate energy meters and powerful compact power meters. These proven products come with multiple options to satisfy any requirement. Schneider Electric products are safe and reliable. We comply with the most stringent standards, including IEC, MID, UL, etc., and we thoroughly test all products with third-party laboratories. This gives our partners the peace of mind and the confidence that they are maintaining a good reputation while delivering the best value in equipment and service to their customers. Our products are simple to install, configure, and use. This saves our partners time and money and lets them deliver the best solutions in a timely and cost-effective manner.
    [Show full text]
  • Voltage and Power Measurements Fundamentals, Definitions, Products 60 Years of Competence in Voltage and Power Measurements
    Voltage and Power Measurements Fundamentals, Definitions, Products 60 Years of Competence in Voltage and Power Measurements RF measurements go hand in hand with the name of Rohde & Schwarz. This company was one of the founders of this discipline in the thirties and has ever since been strongly influencing it. Voltmeters and power meters have been an integral part of the company‘s product line right from the very early days and are setting stand- ards worldwide to this day. Rohde & Schwarz produces voltmeters and power meters for all relevant fre- quency bands and power classes cov- ering a wide range of applications. This brochure presents the current line of products and explains associated fundamentals and definitions. WF 40802-2 Contents RF Voltage and Power Measurements using Rohde & Schwarz Instruments 3 RF Millivoltmeters 6 Terminating Power Meters 7 Power Sensors for URV/NRV Family 8 Voltage Sensors for URV/NRV Family 9 Directional Power Meters 10 RMS/Peak Voltmeters 11 Application: PEP Measurement 12 Peak Power Sensors for Digital Mobile Radio 13 Fundamentals of RF Power Measurement 14 Definitions of Voltage and Power Measurements 34 References 38 2 Voltage and Power Measurements RF Voltage and Power Measurements The main quality characteristics of a parison with another instrument is The frequency range extends from DC voltmeter or power meter are high hampered by the effect of mismatch. to 40 GHz. Several sensors with differ- measurement accuracy and short Rohde & Schwarz resorts to a series of ent frequency and power ratings are measurement time. Both can be measures to ensure that the user can required to cover the entire measure- achieved through utmost care in the fully rely on the voltmeters and power ment range.
    [Show full text]
  • A Self-Balancing Direct-Current Bridge for Accurate Bolometric Power Measurements
    --------------------- Journal of Research of the National Bureau of Standards Vol . 59, No.2, August 1957 Research Paper 2776 A Self-Balancing Direct-Current Bridge for Accurate Bolometric Power Measurements Glenn F. Engen Un til recently, the most accurate microwave power measurements of the bolometri c t ype have required t he use of a manual d-c bridge. A self-ba lan cin g d-c bridge h as bee n developed t hat preserves t he inheren t accuracy of t he m anual bridge, extends the d y namic range of operation, and greatly simplifies t he operating procedure. A general descrip t. ion of the equipment and operating techniques is given, followed b.v it co mprehensiv e survey of t he sources of error accompanyin g t Ile m ethod a nd t he accuracy achieved . 1. Introduction con tains a random el'l'Ol' of ± 0.005 percen t , it can be shown that for a Lypical bolometer operating at A large amount of th e research effor t expendrd in 200 ohms and requiring 8.5 ma of bifLs (i l = 17 m a) tl10 field of 101'1 level microwave power measurement the error in measuring Prr m ay b e as large as 0.02 , in the past few years has beel1 direcLe d toward a 0. 3, a nd 3 percent at the 10, ], alld 0.1 mw level s, rc­ detC'rmination of bolometer-mount effi ciencies, or spectively , if all oLher sources of rno]' arc neglected. evaluation of lli e validity of the r-f- d-c substitution Tbe small difference beLween it a nd 'i2 at low lcyels pri Ilci plc.
    [Show full text]
  • Circuit-Analysis-With-Multisim.Pdf
    BÁEZ-LÓPEZ • GUERRERO-CASTRO SeriesSeriesSeries ISSN:ISSN: ISSN: 1932-31661932-3166 1932-3166 BÁEZ-LÓPEZ • GUERRERO-CASTRO BÁEZ-LÓPEZ • GUERRERO-CASTRO SSSYNTHESISYNTHESISYNTHESIS L LLECTURESECTURESECTURES ON ONON MMM MorganMorganMorgan & & & ClaypoolClaypoolClaypool PublishersPublishersPublishers DDDIGITALIGITALIGITAL C CCIRCUITSIRCUITSIRCUITS AND ANDAND S SSYSTEMSYSTEMSYSTEMS &&&CCC SeriesSeriesSeries Editor:Editor: Editor: Mitchell MitchellMitchell Thornton,Thornton, Thornton, Southern SouthernSouthern Methodist MethodistMethodist University UniversityUniversity CircuitCircuitCircuit Analysis AnalysisAnalysis with withwith Multisim MultisimMultisim DavidDavidDavid Báez-LópezBáez-López Báez-López andand and FélixFélix Félix E.E. E. Guerrero-CastroGuerrero-Castro Guerrero-Castro CircuitCircuitCircuit AnalysisAnalysisAnalysis withwithwith UniversidadUniversidadUniversidad dede de laslas las Américas-Puebla,Américas-Puebla, Américas-Puebla, MéxicoMéxico México ThisThisThis bookbook book isis is concernedconcerned concerned withwith with circuitcircuit circuit simulationsimulation simulation usingusing using NationalNational National InstrumentsInstruments Instruments Multisim.Multisim. Multisim. ItIt It focusesfocuses focuses onon on MultisimMultisimMultisim thethethe useuse use andand and comprehensioncomprehension comprehension ofof of thethe the workingworking working techniquestechniques techniques forfor for electricalelectrical electrical andand and electronicelectronic electronic circuitcircuit circuit simulation.simulation. simulation.
    [Show full text]
  • Measurement Procedure and Test Equipment Used
    MOTOROLA INC. FCC ID: ABZ99FT4056 TEST SET-UP PROCEDURES AND TEST EQUIPMENT USED Pursuant to 47 CFR 2.947 Except where otherwise stated, all measurements are made following the Telecommunications Industries Association/Electronic Industries Association (TIA/EIA) “Land Mobile FM or PM Communications Equipment Measurement and Performance Standards” (TIA/EIA-603-A). This exhibit presents a brief summary of how the measurements were made, the required limits, and the test equipment used. The following procedures are presented with this application: 1) Test Equipment List 2) RF Power Output 3) Audio Frequency Response 4) Post Limiter Lowpass Filter Response 5) Modulation Limiting Characteristic 6) Occupied Bandwidth 7) Conducted Spurious Emissions 8) Radiated Spurious Emissions 9) Frequency Stability vs. Temperature and Voltage 10) Transient Frequency Behavior EXHIBIT 7 SHEET 1 OF 6 MOTOROLA INC. FCC ID: ABZ99FT4056 Test Equipment List Pursuant to 47 CFR 2.1033(c) The following test equipment was used to perform the measurements of the submitted data. The calibration of this equipment is performed at regular intervals. Transmitter Frequency: HP 5385A Frequency Counter with High-Stability Reference Temperature Measurement: HP 2804A Quartz Thermometer Transmitter RF Power: HP 435A Power Meter with HP 8482A Power Sensor DC Voltages and Currents: Fluke 8010A Digital Voltmeter Audio Responses: HP 8903B Audio Analyzer Deviation: HP 8901B Modulation Analyzer Transmitter Conducted Spurious and Harmonic Emissions: HP 8566B Spectrum Analyzer with HP 85685A Preselector Transmitter Occupied Bandwidth: HP 8591A Spectrum Analyzer Radiated Spurious and Harmonic Emissions: Radiated Spurious and Harmonic Emissions were performed by: Motorola Plantation OATS (Open Area Test Site) Lab 8000 West Sunrise Blvd.
    [Show full text]
  • Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science
    Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.002 - Circuits and Electronics Fall 2004 Lab Equipment Handout (Handout F04-009) Prepared by Iahn Cajigas González (EECS '02) Updated by Ben Walker (EECS ’03) in September, 2003 This handout is intended to provide a brief technical overview of the lab instruments which we will be using in 6.002: the oscilloscope, multimeter, function generator, and the protoboard. It incorporates much of the material found in the individual instrument manuals, while including some background information as to how each of the instruments work. The goal of this handout is to serve as a reference of common lab procedures and terminology, while trying to build technical intuition about each instrument's functionality and familiarizing students with their use. Students with previous lab experience might find it helpful to simply skim over the handout and focus only on unfamiliar sections and terminology. THE OSCILLOSCOPE The oscilloscope is an electronic instrument based on the cathode ray tube (CRT) – not unlike the picture tube of a television set – which is capable of generating a graph of an input signal versus a second variable. In most applications the vertical (Y) axis represents voltage and the horizontal (X) axis represents time (although other configurations are possible). Essentially, the oscilloscope consists of four main parts: an electron gun, a time-base generator (that serves as a clock), two sets of deflection plates used to steer the electron beam, and a phosphorescent screen which lights up when struck by electrons. The electron gun, deflection plates, and the phosphorescent screen are all enclosed by a glass envelope which has been sealed and evacuated.
    [Show full text]
  • Electronic Voltmeters and Ammeters - Alessandro Ferrero, Halit Eren
    ELECTRICAL ENGINEERING – Vol. II - Electronic Voltmeters and Ammeters - Alessandro Ferrero, Halit Eren ELECTRONIC VOLTMETERS AND AMMETERS Alessandro Ferrero Dipartimento di Elettrotecnica, Politecnico di Milano, Italy Halit Eren Curtin University of Technology, Perth, Western Australia Keywords: currents, voltages, measurements, standards, analog voltmeters, digital voltmeters, microvoltmeters, oscilloscopes Contents 1. Introduction. 2. Analog Meters 2.1. DC Analog Voltmeters and Ammeters 2.2. AC Analog Voltmeters and Ammeters 2.3. True rms Analog Voltmeters 3. Digital Meters 3.1. Dual-Slope DVMs 3.2. Successive-Approximation ADCs 3.3. AC Digital Voltmeters and Ammeters 3.4. Frequency Response of AC Meters 4. Radio-Frequency Microvoltmeters 5. Vacuum-Tube Voltmeters and Oscilloscopes 5.1. Analog Oscilloscopes 5.2. Digital Storage Oscilloscopes (DSOs) 5.3. Portable Oscilloscopes 5.4. High-Voltage Oscilloscopes Appendix Glossary Bibliography Biographical Sketches Summary Voltage UNESCOand current measurements are – esse EOLSSntial parts of engineering and science. Instruments that measure voltages and currents are called voltmeters and ammeters, respectively. ThereSAMPLE are two distinct types of voltmeterCHAPTERS and ammeter, which differ from each other by the operating principle that they are based on: electromechanical instruments and electronic instruments, which also include oscilloscopes. Electromechanical voltmeters and ammeters, including thermal-type instruments, represent early technology, but still are used in many applications. Basic elements of voltages and currents from the basic physical principles have been introduced in the electromechanical voltage and current measurements section. Also, voltage and currents standards have been dealt with in detail in other articles. ©Encyclopedia of Life Support Systems (EOLSS) ELECTRICAL ENGINEERING – Vol. II - Electronic Voltmeters and Ammeters - Alessandro Ferrero, Halit Eren In this article, modern electronic voltmeters and ammeters are discussed.
    [Show full text]
  • Installation Guide Tegra 710 and 810 Digital Metering
    Installation Guide Tegra 710 and 810 Digital metering Introduction This manual provides operating and installation instructions for the Tegra 710 and 810 multifunction digital metering systems. Both Tegra metering systems combine a basic accuracy of 0.5% with fast response, optional RS485 or relay output and an easy to read LCD display. Tegra configurations and product codes Description Product Code WITH RELAY O/P TEGRA-710-200 WITH RS485 MODBUS O/P TEGRA-710-010 WITH RELAY O/P TEGRA-810-200 WITH RS485 MODBUS O/P TEGRA-810-010 Note: The (*) sign refers to RS485 Modbus O/P and (**) to relay O/P Warnings In the interest of safety and functionality this product must be installed by qualified properly trained personnel abiding by local regulations. Voltages dangerous to human life are present at some of the terminal connection of this unit. Ensure that all supplies are de-energised before attempting any connection or disconnection. External installations must be sufficient to protect human life and equipment under fault conditions. Caution Follow the installation diagrams carefully. These products do not have internal fuses; therefore external fuses must be used for protection for safety under fault conditions. The current inputs of these products are designed for connection into systems via current transformers x/5A. Never open-circuit the secondary winding of a current transformer. Always ensure that the power is disconnected before separating the current connector from the Tegra. Operation outside specified limits may cause permanent damage or temporary disruption. Do not power or connect the instrument if any part is damaged.
    [Show full text]