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High-Voltage Metrology

Working Group 2.32

Profile

In this working group high voltage measuring and generating systems are calibrated, researched and constructed. These include high DC, AC and impulse voltages up into the megavolt range, impulse currents, partial discharge calibrators, capacitances and loss factor measurements. Furthermore, calibrations, certifications and examinations in the fields of high DC currents, electric field strength and electric pulse devices were performed.

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Research/Development

The working group High-voltage Metrology conducts research at national and international levels. This includes both the high voltage metrology and its applications in the field of electrical installations and protection devices.

  • Fundamental research in the field of Ultra High Voltage at very high DC, AC and especially impulse voltages operates in numerous projects. Specifically, the determination of the non-linearity is in the focus of this research.
  • As part of a PhD thesis work a research on conducted electrical weapons and gas spraying devices is started in 2016. This includes both the metrological and legal perspective. Results of this research will be incorporated as recommendations into legislation.
  • The construction of new generating and measuring equipment is undertaken under PhD theses and student works. These include new control and automation methods for measuring devices as well as new methods of measurement techniques for high voltages and currents.

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Services

The service area of the the working group 2.32 includes tests and calibrations of high voltage measuring systems. Further, the backup of the state-approved test centers for electricity and of the accredited calibration laboratories of the Germany’s national Accreditation Body (DAkkS) is within the scope of the working group.

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Calibration System for Lightning Impulse and Switching Impulse Test Sets

Short Name LI / LIC / SI
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 0,3 % up to 0,5 % for Û
1 % up to 2 % for Time Parameter
Measuring Conditions

10 V up to 1500 kV
0,5 µs up to 60 µs 

 

 

 

 

Calibrator for Step Voltage

Short Name Step Voltage
Principle Step Method
rel. ext. (k=2) Measurement Uncertainty 5 % for Overshoot
5 ns up to 20 ns for Time Parameter
Measuring Conditions

1 % up to 5 % overshoot
1 ns up to 1000 ns for Time Parameter

Calibrator for Impulse Current

Short Name Impulse Current
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 0,5 % up to 0,6 % for Î
1,3 % up to 1,5 % for  Time Parameter
Measuring Conditions

50 A up to 20 kA
8 µs up to 20 µs

Calibrator for High Voltage (HVAC)

Short Name HVAC
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 5·10-5 bis 1·10-4
Measuring Conditions

1 kV up to 800 kV
10 pF up to 1000 pF
15 Hz up to 400 Hz

 

 

 

 

 

Calibrator for High Voltage (HVDC)

Short Name HVDC
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 2·10-6 up to 100·10-6
Measuring Conditions

up to ±400 kV
up to 10 mA

 

Calibrator for Partial Discharge Test Sets

Short Name TE
Principle Direct Method
rel. ext. (k=2) Measurement Uncertainty (0.2 + 0.02q), q in pC
Measuring Conditions

1 pC up to 5000 pC
0.5 ns up to 500 µs

 

 

 

 

 

 

Calibrator for Loss Factor Test Sets

Short Name tan (δ)
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 1·10-5 up to 1·10-3
Measuring Conditions

1 pF up to 1000 pF

For Low-Voltage:
50 Hz up to 1000 Hz

For High-Voltage:
15 Hz up to 300 Hz

 

 

 

 

Calibrator for Capacity

Short Name C
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty ≥1·10-4
Measuring Conditions

1 pF up to 10000 pF

For Low-Voltage:
50 Hz up to 1000 Hz

For High-Voltage:
15 Hz up to 300 Hz

 

 

 

 

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Information

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