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Multi-Function Meters for Electrical Power Measurements 

12/9/2013

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Picture
Multifunction meters provide digital displays of electrical parameters. A wide range of meters is available from many manufacturers. Multifunction meters have been used since the early 1980's. Their use has increased over time because of the advantages offered by multifunction meters compared with traditional analogue meters. The application for multifunction meters covers a wide range, from low voltage switchboards to HV substations. 

Advantages can include: 
  • A large range of electrical parameters measured with a single device
  • Power quality parameters can be measured
  • Digital Display
  • Multifunction
  • Compact Display
  • Network connectivity options for remote monitoring, Trending and data logging
  • Reliability
  • Accuracy


In the selection of the meter, care should be exercised to identify both the functions and electrical parameters necessary for the particular application. For example, the application may require the total harmonic distortion (THD) and the harmonic voltages/currents to a certain order e.g. to the 25th harmonic. 

The configuration of the meter will be done by the user and the method will vary according to the manufacturer. Some meters are configured from the front face of the meter, using a keypad. Others are configured using software provided by the manufacturer. If the meter is connected to a data network, there will be additional configuration to get the meter working as part of the network and the testing to prove the data interface.

An important factor to consider is the location of the meter. It is difficult to place the meters in an outdoor location without additional protection. This is because of the IP rating of the meter whether or not the meter can be easily read in sunlight.  An ideal location would be inside an air conditioned switch-room. 

Other features to be checked before selecting a meter include:
  • The range voltage and current phases e.g. single-phase, 3-phase 3-wire, 3-phase 4-wire
  • The programmable ranges for the voltage transformer (VT) input
  • The maximum measurement ranges for kW, kVA, kVAR
  • The requirement for the demand measurements e.g. current 15-minute maximum demand
  • The programmable units for pulse outputs
  • The network connection e.g Modbus RS485, Modbus TCP/IP, Lonworks, Ethernet/IP, etc.
  • Internal bridging of current transformer (CT) secondaries within the meter, which could limit the connection of other devices in the CT loop
  • DC auxiliary supply voltage, so the communications to the device is maintained if the AC circuits are not energised



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    Author

    David Batterham

    David is the director of BESST as well as their lead Industrial Electrical Engineer. David is a Registered Professional Engineer (RPEQ) in the state of Queensland and has experience in all aspects of Industrial Electrical Engineering, on projects all over the world. David's commitment to excellence is unparalleled.

    Join David as he shares his thoughts, experiences and current issues relating to Electrical Engineering.

    You can also follow 
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    We look forward to sharing great ideas here!

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Batterham's Electrical Switchboard Services & Trading Pty Ltd (BESST Pty Ltd). +61 (0)7 3219 4927. ABN. 46 380 749 210 ACN. 107 691 565. PO BOX 271 Sunnybank QLD 4109 Australia
  • Home
    • About Us
    • Contact Us
    • Blog >
      • Technical Bulletin
    • Engineering Projects >
      • Diesel Power Station Extension, Gove NT
      • Condamine Power Station, QLD
      • West Kimberley Power Project
      • Millennium Arts Project, Southbank
      • Andoom Power Station, Weipa QLD
  • Store
    • Terms & Conditions >
      • Terms & Conditions
      • LDU Terms & Conditions
  • SURGE PROTECTION SOLUTIONS
    • Surge Protection Assessment Service
    • Surge Protection Audit & Certification
    • Survey: What are Today's Surge Protection Problems
  • SYNAPSE SMART CITY PLATFORM
  • Engineering
    • RPEQ
    • Geometrix Robotics
    • Power Generation >
      • Air-J1939
      • Air-EMCP
      • Powertrain Generator System
      • Remote Area Power Stations
      • Power Generation Systems
      • Type B Appliance
    • Electrical Engineering >
      • Power System Studies
      • FEED Studies
      • Cable Systems
      • Underground Transmission Lines
      • Substations
      • Panel Assembly
      • EEHA
    • DETAILED DESIGN & DRAFTING >
      • LNG Plants - Electrical Design
      • Switchgear Assemblies
      • Cable Installation Systems
      • System Automation
      • Substation Switch-Rooms
      • Electrical Drafting
  • Martechnic - Fuel, Lube & Hydraulic Oil Management
    • PORTABLE TEST EQUIPMENT >
      • KITS FOR HIRE
      • TWIN CHECK
      • WIO CHECK Water in Oil
      • MT TEST KIT VERIFIER
      • COMPATIBILITY & DENSITY CHECK
      • IRON CHECK
      • SPOT CHECK
      • VISCOSITY (GO / NO GO)
      • VISCO DENS PLUS
      • VISCO CYLINDER Standard / Low Viscosity
      • JUNG CHECK - Viscosity
      • AN (Acid Number) CHECK
      • SALT CHECK
      • SAMPLING KIT
      • INSOLUBLE-CHECK
      • FLASH POINT CHECK
    • TEST KITS >
      • ALWAVIS CHECK
      • LUBE OIL CHECK 5
      • LUBE OIL CHECK 6
      • LUBE OIL CHECK OS
      • FUEL & LUBE OIL TEST CABINET
    • SAMPLING >
      • DRIP SAMPLER PRESSURE-PLUS
      • SAMPLING BOTTLES
      • MT SAMPLE RETENTION SYSTEM
      • DRIP SAMPLER
    • STATIONARY SENSORS >
      • MT MODULAR MONITORING SYSTEM
      • AHHOI + MANIFOLD
      • AHHOI IR WATER IN-LINE
      • PARTICLE SENSOR
      • VISCOSITY SENSOR
      • HUMIDITY SENSOR STANDARD
      • HUMIDITY SENSOR PLUS
      • FE SENSOR
      • DATALOGGER
    • CLEANING >
      • ULTRASONIC CLEANING TANK
      • ULTRASONIC GENERATOR
      • ULTRASONIC CLEANING LIQUID
  • MECT - Control & Automation, Instruments
    • SIGNAL CONDITIONERS - CONVERTER MPCV015
    • AIR SPEED SENSOR MPSN20
    • CPU MPX28
    • STARTER KIT TPAC1007
  • NETHIX - Remote Monitoring & Control
    • INDUSTRY SOLUTIONS
    • WEB PORTAL
    • APPS - iOS & ANDROID
    • R&D DEVELOPMENT & ENGINEERING
    • WE Family
    • EXPANSIONS
    • ACCESSORIES
  • iLumTech - INNOVATION AHEAD
    • DALI APPLICATIONS
    • LIGHTING CONTROL SENSORS >
      • EHA SENSOR
      • DALI AMBIENT SENSOR OUTDOOR
      • DALI AMBIENT SENSOR
    • DALI CONTROL INTERFACES >
      • DLS TOUCH PANEL II
      • DEEBRIDGE
      • BLUE BRIDGE
    • TUNABLE WHITE APPLICATIONS >
      • DALI TW MODULE TYPE 6
      • DALI TW MODULE TYPE 8
      • MANUAL TW MODULE 01
      • MANUAL TW MODULE 02
    • DALI POWER LINE COMMUNICATION >
      • DALI PLC Bridge
      • DALI PLC-IN
    • DALI DEVICES >
      • DALI INPUT UNIT
      • DALI 4 x RELAY
    • ACCESSORIES FOR DALI >
      • DALI/USB BRIDGE
      • DALI POWER SUPPLY
    • NANODIFFUSER
    • LENS SYSTEMS >
      • GEMINI DEEP
      • GEMINI MEDIUM WIDE
      • GEMINI DOUBLE ASYM
    • INFINITAS >
      • INFINITAS 04
      • INFINITAS 08
      • 3-1 LED MODULES
  • LDU Power & Data Surge Protection
    • Gatekeeper Low Voltage Surge Filters 1P, 3P
    • Downloads
  • Direct Strike Lightning Protection
  • WPX Surge Protection
    • Cable TV Antenna Surge Protector
    • Wireless Antenna Surge Protector
    • Control Signal 5VDC Surge Protector
    • PV Solar 48VDC Surge Protector
    • PV Solar 300VDC Surge Protector
    • EMI Filter 240Vac
    • Equipotential Bond Surge Protector
    • Multifunction Power & Data Surge Protector
    • 8-Port TCP/IP Surge Protector
    • 16-Port TCP/IP Surge Protector
    • Phone LIne Surge Protector
    • 4-Port POE Surge Protector
    • IP67 POE Surge Protector
  • Survey: EMI Filter
✕