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The National Measurement Institute (NMI) offers the most accurate high voltage and high current measurement services in Australia. We support clients by manufacturing, calibrating and testing power system instruments, and by delivering contract research, training and advice.

We’re the peak body for measurement, which means we work to ensure the accuracy and traceability of power system measurements made in Australia. We develop, maintain and disseminate the physical national standards for high-voltage and high-current measurement. We disseminate the national standards by providing end-to-end high measurement services for industry clients. Our client services are:

  • calibrating and testing instruments and standards with the lowest uncertainties
  • designing, manufacturing and supplying high voltage instruments and standards for other laboratories
  • undertaking contract research and development including renewable energy projects
  • consultancy and advice for solving challenging high voltage measurement issues
  • training and assessment including bespoke training to use specialised high voltage equipment

We deliver most services at our high voltage laboratory in Sydney. We deliver some services at client’s sites around Australia through our mobile laboratory. We’re accredited by the National Association of Testing Authorities (NATA).

Power system calibration and testing

We specialise in calibrating and testing high voltage and high current instruments and standards. This includes high voltage resistive dividers, compressed-gas capacitors, ferro-magnetic voltage transformers and high-voltage and high current sensors.

Most of our calibration clients are from the electricity supply industry, overseas metrology institutes and other laboratories in Australia. Many NATA-accredited laboratories use standards we calibrate and test to calibrate their clients’ instruments. Measurements and calibrations made with instruments we calibrate are directly traceable to the national primary standards we maintain.

Instruments we calibrate

We calibrate reference measurement systems, devices and instruments which are used for measuring DC, AC or impulse voltage. The most common instruments we calibrate are:

  • high voltage capacitors (e.g. compressed-gas or paper-oil)
  • voltage transformers
  • current transformers
  • capacitor voltage transformers
  • dc and ac high voltage voltmeters 
  • dc and ac high voltage dividers
  • impulse voltage measurement systems
  • impulse voltage dividers
  • impulse current measurement systems
  • impulse current shunts 
  • impulse voltage and impulse current digitisers
  • partial discharge calibrators
  • electrical fast transient (burst) testers 
  • surge testers

High voltage testing

We can perform a range of high voltage tests for electricity supply companies, high voltage equipment manufacturers and suppliers. We can test to client specifications and to relevant documentary standards from:

High voltage equipment we can test

  • high voltage insulators
  • high voltage switchgear (disconnectors and circuit breakers)
  • high voltage transformers
  • high voltage inductors
  • high voltage rotating machine coils
  • high voltage cables and cable accessories

The types of high voltage tests we perform

  • ac voltage withstand test (wet and dry) up to 600 kV
  • lightning voltage impulse withstand tests (wet and dry) up to 2800 kV
  • switching impulse voltage withstand tests (wet and dry) up to 1800 kV
  • radio-influence voltage and visual corona tests up to 400 kV
  • partial discharge tests up to 400 kV

For more information email calibration.coordinator@measurement.gov.au.

Power system calibration and testing services

Most of our calibration and testing services are NATA accredited. For more information, see our NATA Scope of Accreditation: NMI Power System Technology Project

Power system calibration and testing costs 

We provide premium calibration and testing services. Our fees relate to the quantity of work done on each instrument. We customise our calibration and testing services to suit requirements. This includes quoting for batch calibrations. For a customised quote email calibration.coordinator@measurement.gov.au.

Typical turnaround times

  • booking to calibration (lead time): 2 to 4 weeks
  • common instrument calibrations: 1 to 2 weeks
  • uncommon, rare or unique instrument calibrations: 2 to 4 weeks
  • calibration report, after calibration: 2 to 4 weeks

We work with clients to meet their schedule wherever possible, including urgent needs.

Request a calibration quote

Equipment design, manufacture and supply

We design, manufacture and supply high voltage and high current measurement equipment. Our equipment is among the most accurate in the world, and used as standards by Australian energy sector clients some of our counterparts overseas. This includes institutes in the US, Canada, New Zealand and throughout the Asia-Pacific

We supply:

  • reference dc and ac resistive dividers
  • reference lightning impulse dividers
  • reference switching impulse dividers
  • digital impulse voltage and current measurement systems
  • impulse calibrators
  • software for calibration of ac/dc dividers and voltmeters
  • partial discharge calibrators
  • partial discharge calibrator calibration system
  • measurement system for electrical fast transients (burst)

For more information or a quotation email info@measurement.gov.au.   

Contract research and development services

Research underpins all our power system measurement work. This applies to our work as a regulator, and as a service provider. We undertake contract research for laboratories, universities, government, manufacturers and the electrical supply industry.
We help clients solve complex measurement issues and capitalise on opportunities from new technologies. The types of research and development projects we undertake for clients includes: 

  • high-voltage measurement systems
  • high-voltage insulation
  • impulse voltage measurement systems
  • applied dielectrics
  • measuring power from renewable sources, and measuring ‘dirty’ power
  • transmission issues associated with renewables, including measuring losses
  • power storage issues, including domestic and industrial batteries

We can undertake short-term or contract research projects, or work under long-term contractual arrangements. Most clients prefer to work with us long-term, usually for 12 months at a time. This enables a stronger foundation of knowledge on our client’s products, services and operations.  

For more information email info@measurement.gov.au.

Power system consultancy and advisory services

We have a ready-made, highly trained workforce with access to the latest power system technology to solve complex problems for our clients. 

As a government organisation we’re in a unique position to offer independent expert advice. We offer this service as part of our role as the peak body for measurement, as we have a mandate to support industry, innovation and science in Australia.

For more information email info@measurement.gov.au.

Training and assessment

As well as our established training courses for industry, we also offer bespoke training for our clients. Typically this is for clients who need their staff to develop skills in a particular area of power system measurement, or with a particular style of instrument. This helps our clients quickly and cost effectively develop new capabilities. Our training also assists laboratories looking to apply for NATA accreditation, or to increase their scope of accreditation.

This can involve training individuals or teams in: 

  • calibration and precision measurement
  • traceability and measurement uncertainty
  • quality system maintenance

Our power system specialists can provide bespoke training on most precision measurement instruments. We can train operators even if the equipment is custom made for their business or organisation. 

For bespoke training options email info@mesurement.gov.au.

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Last updated: 5 June 2019

Content ID: 63506