National Measurement Institute (NMI)

Site

Power Systems Technology Project

Accreditation No.

1

Site No.

14318

Date of Accreditation

29 Mar 2000

Address

36 Bradfield Road
Lindfield West, NSW 2070
Australia

measurement.gov.au

Contact

Ms Charmaine Kwan P: +61 (02) 84673836

Availability

Services conditionally available to external clients

National Measurement Institute (NMI) address map

Scope of Accreditation

Print scopes
Power Systems Technology Project

ISO/IEC 17025 (2017)

Calibration

  • The uncertainty of measurement is reported as an expanded uncertainty having a level of confidence of 95% unless stated otherwise
Service Product Determinant Technique Procedure Limitations
DC and low frequency electrical metrology - High-voltage/high-current standards and equipment Capacitors Capacitance; Dielectric dissipation factor Direct measurement against a reference standard

Capability

Measurement of dielectric dissipation factor and capacitance  
With Calibration and Measurement Capability of -
0.0002 for dielectric dissipation factors from 0.0005 to 0.002 at 0.1 Hz,  up to 15 kVrms.
2% from 9 nF to 12 nF for capacitance
Current transformer test sets Current error; Phase displacement Direct measurement against a reference standard

Capability

Calibrations at 50 Hz and 60 Hz
With Calibration and Measurement Capability of -
0.0003% for current ratio error
0.0003 crad for phase displacement
High voltage measurement systems Capacitance; Dielectric dissipation factor Direct measurement against a reference standard

Capability

High voltage capacitors
Capacitance
With Calibration and Measurement Capability of -
0.0015% from 5 pF to 200 pF up to 550 kV rms

Dielectric dissipation factor
With Calibration and Measurement Capability of -
0.00001 from 0 to 0.2 up to 550 kVrms

Partial discharge test and measurement equipment Electric charge - Coulombs; Rise time Direct measurement against a reference standard

Capability

Calibration of partial discharge calibrators
Apparent charge:
With Calibration and Measurement Capability of -
0.03 pC + 2.5% of reading from 0.5 pC to 10 nC

Rise time of the partial discharge pulses:
With Calibration and Measurement Capability of -
 3 ns from 10 to 100 ns
Voltage transformer test sets Phase displacement; Voltage error Direct measurement against a reference standard

Capability

Calibration at 50 Hz and 60 Hz
With Calibration and Measurement Capability of -
0.0003% ratio error for voltage ratio error from -10% to 10% ratio error
0.0003 crad for phase displacement from -10 to 10 crad
DC and low frequency electrical metrology - High-voltage/high-current standards and equipmentIncluding onsite calibrations Current transformers Current error; Phase displacement Comparison with a reference standard Including by the methods of -
IEC 61869, AS 60044.1:2007,
IEC 60044-1:2003
AS 61869.1 and AS 61869.2		 Method 1
Laboratory accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 160 kVrms and secondary voltages up to 240 V

Method 2
Laboratory and onsite accuracy tests
Accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 550 kVrms and secondary voltages up to 240 V

Capability

Laboratory accuracy tests
With Calibration and Measurement Capability of -
0.0002% to 0.0015% for current ratio error from -12.5% to 12.5%
0.0003 crad for phase displacement from -18.9 crad to 18.9 crad
On-site accuracy tests
With Calibration and Measurement Capability of -
 0.002% for current error from -12.5% to 12.5%
0.002 crad for phase displacement from -18.9 crad to 18.9 crad
High voltage dividers Voltage ratio Comparison with a reference standard

Capability

Including on site calibration
DC voltage ratio of Dividers and Probes
With Calibration and Measurement Capability of -


Calibration and Measurement Capability 
                               Voltage ratio:    
Voltage range		1E-03 to 1E-051E-03 to 1/300001E-03 to 1/6000001E-03 to 1E-06
1 kV to 150 kV0.001%


150 kV to 300 kV
0.005%

300 kV to 600 kV

0.015%
600 kV to 1000 kV


0.03%
High voltage measurement systems Voltage error; Voltage ratio Comparison with a reference standard

Capability

DC voltage measurement systems including voltmeters for DC voltage ratio and DC voltage error
Including onsite calibrations
With Calibration and Measurement Capability of -
20 µV/V from 1 kV to 150 kV
50 µV/V from 150 kV to 300 kV
150 µV/V from 300 kV to 600 kV
300 µV/V from 600 kV to 1000 kV
Voltage error; Voltage ratio Comparison with a reference standard

Capability

AC voltage measurement systems; Voltmeters; Dividers; Probes for AC voltage ratio and AC voltage error
including on site calibrations
With Calibration and Measurement Capability of -
0.1% to 550 kVpeak/√2 and 550 kVrms at 50 Hz and 60 Hz
Impulse voltage measurement systems Voltage error; Voltage ratio Indirect measurement against a reference standard Including by the methods of -
IEC-60060, AS 60060, and
AS 1931.1:1996, AS 1931.2: 1996 - High-voltage test techniques
AS 61083, IEC 61083 - Instruments and software used for measurement in high-voltage impulse tests

Capability

Including laboratory and on site calibrations
With Calibration and Measurement Capability of
Calibration of lightning impulse voltage measurement systems
0.4% for voltage ratio, scale factor/voltage error up to 350 kVpeak
2% for front time up to 350 kVpeak
1% for voltage ratio, scale factor/voltage error from 350 kVpeak to 1 MVpeak
3% for front time from 350 kVpeak to 1 MVpeak
1% for time to half value up to 1 MV
0.6% absolute for Voltage linearity test at voltages up to 2.6 MVpeak
1% for relative overshoot of -5% to 15% at test voltages up to 1 MV
0.1% for ratio of interference voltage of 0% to 2% at test voltages up to 1 MV

Calibration of chopped lightning impulse voltage measurement systems
1% for voltage ratio, scale factor/voltage error to 350 kVpeak
2% for voltage ratio, scale factor/voltage error from 350 kVpeak to 700 kVpeak
3% for front time of 0.8 µs to 1.6 µs at test voltages up to 700 kV 
2% for time to-chop of 0.45 µs to 7 µs at test voltages up to 700 kV 

Calibration of switching impulse voltage measurement systems
1% for voltage ratio, scale factor/voltage error to 500 kVpeak
3% for time to peak to 500 kVpeak
2% for time to half value to 500 kVpeak
0.4% absolute for Voltage linearity test at voltages up to 1.8 MVpeak

Step response of impulse voltage dividers
4 ns for Experimental response time TN from 0 ns to 50 ns
4 ns for Partial response time T. from 5 ns to 50 ns
7 ns + 1% of ts for settling time ts from 20 ns to 3000 ns
1% for step response overshoot β from 0% to 40%
Voltage transformers Phase displacement; Voltage error Direct measurement against a reference standard Including by the methods of -
IEC 61869, AS 60044.2:2007,
IEC 60044-2:2003,
AS 61869.1 and AS 61869.3		 Method 1
Laboratory accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 160 kVrms and secondary voltages up to 240 V

Method 2
Laboratory and onsite accuracy tests
Accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 550 kVrms and secondary voltages up to 240 V

Capability

With Calibration and Measurement Capability of -
Accuracy tests in the laboratory
(0.0003+(Primary Voltage(kV))/100000))% for voltage error from -0.11% to 0.11%
(0.0003+(Primary Voltage(kV))/100000)) crad for phase displacement from -0.11 crad to 0.11 crad
 On-Site accuracy tests
0.005% for voltage error from -0.11% to 0.11%
0.005 crad for phase displacement from -0.11 crad to 0.11 crad
High frequency electrical metrology - Communications, electromagnetic field strength and EMC test equipment Electrical fast transients (EFT) and surge generators Pulse characteristics Comparison with a reference standard By the methods of IEC 62475 and AS IEC 62475

Capability

Calibration of surge generators
With Calibration and Measurement Capability of -
1.1% from 6 μs to 10 μs for Front time;
1.0% from 15 μs to 25 μs for Time to half value;
1.0% from 10 A to 550 A for Peak current;
Pulse characteristics Comparison with a reference standard Measurement of Pulse high voltage and current electrical fast transient (burst) parameters;
By the methods of IEC 61000-4-4 and AS/NZS 61000.4.4		 Vp, tr, tw, repetition frequency and burst period within limits of IEC 61000-4-4

Capability

Calibration of burst generators;
with Calibration and Measurement Capability of  -
0.5% from 240 ms to 360 ms for burst period;
0.5% from 0.5 ms to 18 ms for burst duration;
1.0% from 5 kHz to 100 kHz for repetition frequency;
6.0% from 35 ns to 150 ns for pulse width;
8.0% from 3 μs to 6 μs for rise time;
7.0% from 125 V to 4000 V for peak voltage

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Evaluation of high voltage/power equipment and components - Performance Cables AC voltage; DC voltage; Dielectric dissipation; Impulse voltage; Leakage current; Partial discharge High voltage

By the methods of -
AS/NZS 1026 - Electric cables - Impregnated paper insulate,
AS/NZS 1429 - Electric cables - polymeric insulated,
AS/NZS 3599 - Electric cables - Aerial bundled - Polymeric insulated,
AS/NZS 3808 - Insulating and sheathing materials for electric cables,
IEC 60526 - High-voltage cable plug and socket connections for medical X-ray equipment

In the Laboratory
Dielectric withstand tests, both wet and dry up to 600 kV
AC voltage up to 600 kV
DC voltage up to 1 MV
Leakage current from 1 μA up to 5 mA
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge and RIV test voltage up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz


In the field Testing
Dielectric withstand tests (dry only) up to 600 kV
AC voltage up to 600 kV
DC voltage up to 1 MV
Leakage current from 1 μA up to 5 mA
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz

Electricity grid and industrial power supply equipment and systems AC voltage; Corona onset and extinction voltage; Dielectric dissipation; Impulse voltage; Radio influence voltage measurement High voltage

By the methods of -
AS/NZS 60265, IEC 60265 - High-voltage switches
IEC 60076-6
IEC 60289-1988 - Reactors,
AS/NZS 2650:2000, AS 2650:2005 - common specifications for high-voltage switchgear and control gear standards,
IEC 60700 - Thyristor valves for high-voltage direct current (HVDC) power transmission,
AS 60947, IEC 60947 - Low-voltage switchgear and control gear,
AS 62271, IEC 62271 - high-voltage switchgear and control gear;
 IEEE std C37.66: IEEE standard requirements for capacitor switches for AC systems,
AS 2067 - Switchgear assemblies and ancillary equipment for alternating voltages above 1 kV,
AS 2467:2008 - Maintenance of electrical switchgear;

 High voltage switchgears and reactors
In the laboratory
Dielectric withstand tests, both wet and dry up to 600 kV
AC voltage up to 600 kV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge, RIV test and corona test voltage up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz

In the field testing
Dielectric withstand tests (dry only) up to 600 kV
AC voltage up to 600 kV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge up to 380 kV
 Dielectric dissipation up to 550 kV at 50 Hz
Partial discharge Partial discharge

By the methods of -

AS 60270; IEC 60270

For test voltages up to 380 kV ACrms

AC voltage; DC voltage; Dielectric dissipation; Impulse voltage High voltage

By the methods of -

IEC 60060-1; IEC 60060-2; IEC 60060-3;
AS IEC 60060.1; AS IEC 60060.2;
AS 1931.1:1996; AS 1931.2:1996;

(High Voltage test techniques only)

Dielectric withstand tests, both wet and dry up to 600 kV
AC voltage up to 600 kV
DC voltage up to 1 MV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
 Dielectric dissipation up to 550 kV at 50 Hz

Insulators AC voltage; Corona onset and extinction voltage; DC voltage; Dielectric dissipation; Impulse voltage; Leakage current; Partial discharge; Radio influence voltage measurement High voltage By the methods of -
IEC 60071 - Insulation co-ordination
IEC 60383 - insulators for overhead lines with a nominal voltage above 1000 V
AS/NZS 2947.1 AS/NZS 2947.2:2002
IEC 60383 - insulators - porcelain and glass for overhead powerlines-voltages greater than 1000 V a.c,
AS 60720, IEC 60270 - characteristics of line post insulators,
IEC 61109 - composite insulators for a.c. overhead lines with a nominal voltage greater than 1000 V,
IEC 61467 - insulators for overhead lines-insulator strings and sets for lines with a nominal voltage greater than 1000 V-AC power arc tests,
AS 4435.1:1996, AS/NZS 4435.2,
IEC 61952 - insulators-composite for overhead power lines-voltage greater than 1000 V a.c,
AS IEC 62073 - Guidance on the measurement of wettability of insulators of insulator surfaces,
AS IEC 62217 - polymeric insulators for indoor and outdoor use with anominal voltage > 1000 V- General Definitions, test methods and acceptance criteria,
AS 1154 - Insulator and conductor fittings for overhead power lines,
AS 1824.1:1995, AS 1824.2:1985 - insulation co-ordination
AS 3609 - Insulators-porcelain stay type-voltage greater than 1000 V a.c,
AS 4398 - Insulators-ceramic or glass-station post for indoor and outdoor use-voltage greater than 1000 V a.c,
AS 4899 - Pin insulators-porcelain and glass for overhead power lines-voltage greater than 1000 V a.c.,
IEC 60672 - ceramic and glass insulating materials,
IEC 60060-1; IEC 60060-2; IEC 60060-3;
AS IEC 60060.1; AS IEC 60060.2;
AS 1931.1:1996; AS 1931.2:1996;
(High Voltage test techniques only)

In the laboratory
Dielectric withstand tests, both wet and dry up to 600 kV
AC voltage up to 600 kV
DC voltage up to 1 MV
Leakage current from 1 μA up to 5 mA
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge, RIV test and corona test voltage up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz


In the field Testing
Dielectric withstand tests (dry only) up to 600 kV
AC voltage up to 600 kV
DC voltage up to 1 MV
Leakage current from 1 μA up to 5 mA
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge up to 380 kV
 Dielectric dissipation up to 550 kV at 50 Hz

Platform access equipment for use in high voltage/power applications Electrical continuity; High voltage withstand; Insulation resistance; Leakage current; Visual examination Dielectric tests with alternating or direct voltages ANSI/SIA A92.2 - American National Standard for Vehicle-Mounted Elevating and Rotating Aerial Devices.
ANSI/SIA A92.2 - 2009		 Testing of Mobile Elevating Work Platforms (MEWPs)
Dielectric withstand tests, both wet and dry, up to 600 kV
AC voltage up to 600 kV
DC voltage up to 1 MV
Leakage current from 1 μA up to 5 mA
Transformers and inductors AC voltage; Dielectric dissipation; Impulse voltage; Partial discharge High voltage

By the methods of -
AS 2374,
AS/NZS 60076 ; IEC 60076.
IEC 61869,
AS 60044.1:2007 IEC 60044-1:2003
AS 60044.2:2007, IEC 60044.2:2003
AS 61869.1:2021, AS 61869.2:2021, AS 61869.3:2021

Dielectric withstand tests, both wet and dry
by the methods of -
IEC 60060 and
 AS 1931.1:1996; AS 1931.2:1996 (High voltage tests only)

In the Laboratory

Dielectric withstand tests, both wet and dry
Partial discharge voltage
Lightning impulse
Switching impulse voltage
Dielectric dissipation up to 550 kV at 50 Hz


In the field Testing
Dielectric withstand tests, both wet and dry
Partial discharge voltage
Lightning impulse
Switching impulse voltage
Dielectric dissipation up to 550 kV at 50 Hz

AC voltage; Accuracy tests; Dielectric dissipation; Impulse voltage; Partial discharge High voltage

By the methods of -
IEC 61869 , AS 61869.1:2021, AS 61869.2:2021, AS 61869.3:2021
AS 60044.1:2007 IEC 60044-1:2003
AS 60044.2:2007, IEC 60044.2:2003

Tests on current transformers
In the Laboratory
Accuracy tests at 50 Hz and 60 Hz on current transformers with rated primary currents to 20 kA and rated secondary currents up to 10 A
Dielectric withstand tests - wet or dry
AC voltage up to 600 kV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge voltage up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz


In the field Testing
Accuracy tests at 50 Hz and 60 Hz on current transformers with rated primary currents to 5 kA and rated secondary currents up to 5 A
Dielectric withstand tests (dry only)
AC voltage up to 600 kV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge voltage up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz

Tests on voltage transformers
In the Laboratory
Method 1 - accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 160 kVrms and secondary voltages up to 240 V
Method 2 - accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 550 kVrms and secondary voltages up to 240 V
Dielectric withstand tests (dry only)
AC voltage up to 600 kV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge voltage up to 380 kV
Dielectric dissipation up to 550 kV at 50 Hz


In the field Testing
Method 2 - accuracy tests at 50 Hz and 60 Hz on voltage transformers with primary voltages from 20 Vrms to 550 kVrms and secondary voltages up to 240 V
Dielectric withstand tests (dry only)
AC voltage up to 600 kV
Lightning impulse up to 2.6 MV
Switching impulse voltage up to 1.8 MV
Partial discharge voltage up to 380 kV
 Dielectric dissipation up to 550 kV at 50 Hz

ISO/IEC 17025 (2017)

Manufactured Goods

Service Product Determinant Technique Procedure Limitations
Electromagnetic compatibility (EMC) - Emissions - Commercial Overhead power lines and high voltage equipment Corona onset and extinction voltage; Radio influence voltage measurement Not applicable By the methods of -
AS 60437 and IEC 60437 - Radio interference test on high-voltage insulators,
IEC 61284 - Overhead Lines Requirements and Tests for Fittings,
AS 62271 - High-voltage switchgear and control gear,
AS 1154 - Insulator and conductor fittings for overhead power lines,
AS 2650:2005 - Common specifications for high-voltage switchgear and control gear standard,
AS/NZS CISPR 16.1 and AS/NZS CISPR 16.2 - Specification for radio disturbance and immunity measuring apparatus and methods,
CISPR 18-1, CISPR 18-2 and CISPR 18-3 - Radio interference characteristics of overhead power lines and high-voltage equipment		 Radio influence voltage measurement and determination of corona onset and extinction voltages;
Test voltage up to 400 kV

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