High Voltage Metering

Similar to the CTs, the voltage transformers (VTs) also form part of the metrology of the installation. It is important to verify ratios and phase accuracies to ensure data being measured is compliant and accurate.

Testing includes
  • Testing to AS 60044.2 & 5 and AS 1243
  • Testing to IEC 61869 International Standard
  • Primary injection with independent source
  • Investigating simulated supply testing by use of Omicron Votano

Our team works directly with customers and project managers to provide guidance and advice.

Our services include
  • Metering scope advisory
  • Process and engineering advice
  • AEMO application and registration of “K” form
  • Coordinating with DNSP to obtain and register a NMI
  • Interpreting Chapter 7 of the National Electricity Rules
  • Nominating a Metering Coordinator

Our ongoing compliance package is specifically designed to provide peace of mind that your metering assets are operating correctly and to be there for you if a fault arises.

  • Priority fault response
  • HV Maintenance Plan
  • Ongoing meter testing and CT visual inspections
  • Yearly reports on site performance
  • Burden measurement of metering circuitry
  • NATA testing of metering CTs and VTs

We offer a real time power quality metering solution which can be used to monitor and analyse fluctuations in voltage and current harmonics. We use an EDMI Mk6E and offer both permanent and short term solutions.

We measure
  • Harmonic analysis to 50th harmonic of voltage and current
  • Total Harmonic Distortion of voltage and current
  • Recording frequency variance
  • Instantaneous 3 phase waveform capture
  • Detailed site-specific analysis and reporting on the results

The current transformers (CTs) form part of the metrology of the installation. We use state-of-the-art equipment to complete excitation, ratio, polarity and winding resistance tests.

Tests include
  • Testing to AS 60044.1 and AS 1675 standards
  • Testing to IEC 61869 International Standard
  • Primary injection
  • Secondary injection
  • Burden-impedance measurement

It is important to ensure the meter is calibrated and is operating within the specifications provided by the manufacturer. Our testing facility provides the following calibration services, both in the field and in our laboratory.

Calibration includes
  • 4 quadrant calibration
  • Active and reactive energy
  • In-service burden measurement and compensation determinations if required

Our pre-commissioning services ensure an on-schedule, compliant and efficient HV metering installation. We are one of the few that provide NATA-accredited testing of CTs and VTs.

  • Design, scoping and drawings
  • In-house manufacture and build of meter panels
  • Pre-commission testing as required by the Rules
  • HV meter, CT and VT installation and commissioning
  • Post-installation follow-up

Mondo provides both contestable ‘market’ and sub-metering ‘off-market’ services. We can design a metering solution to allow a granular view of your electricity usage.

Our services include
  • Metering Coordinator
  • Meter Provider
  • Meter Data Provider
  • Sub-metering, including for complex PPA arrangements
  • Web portals for data visualisation and reporting

Contact us 

Complete the form below and a technician will be in touch

    First name (required)

    Last name (required)

    Your email (required)

    Phone number

    Company (required)

    Your industry (select one)

    Additional information

    Characters remaining: 500

    Stay up to date

    Select your areas of interest to stay informed with our latest news and insights.