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Instrument Transformers and High-Voltage Metrology

Working Group 2.31

Profile

The tasks of the working group are legally regulated and industrial metrology. The background to this is on the one hand the reliability of the transmission of electrical energy from the generator to the consumer and on the other hand the precise calculation of the energy consumption at high voltages and currents.

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Research/Development

The working group researches and develops new measurement methods, automated measurement data acquisition and measurement devices in the fields of conventional and non-conventional measurement transformers as well as high-voltage measurement and generation devices. Furthermore, the working group participates in current topics of instrument transformer and high voltage technology in the context of national and international research projects. Part of this is technical cooperation with other countries to set up or improve metrology.

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Services

The service area of ​​the working group includes tests and calibrations of high-voltage measuring devices, instrument transformers, converter measuring devices, burdens, and burden measuring devices for the accredited test centers for measuring devices for electricity and other applicants. Furthermore, the support of test centers for measuring devices for electricity and the accredited calibration laboratories of the German Accreditation Body (DAkkS) is the responsibility of the working group.

Calibration System for Lightning Impulse and Switching Impulse Test Sets

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

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

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)

Calibrator for High Voltage
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)

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

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

Calibrator for Capacity
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

 

 

 

 

Calibrator for Instrument Transformer Test Sets

Calibrator for Instrument Transformer Test Sets
Short Name MAV III
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 10 ppm up to 100 ppm
10 µrad up to 100 µrad
Measuring Conditions

0.01 A up to 10 A
23 V up to 138 V
16.7 Hz, 50 Hz, 60 Hz

 

Current Transformer Calibration System

Current Transformer Calibration System
Short Name SEKAM II
Principle Comparision Method
rel. ext. (k=2) Measurement Uncertainty 2 µA/A up to 30 µA/A
2 µrad up to 50 µrad
Measuring Conditions

0.05 A up to 100 kA
16.7 Hz, 50 Hz, 60 Hz

 

Voltage Transformer Calibration System

Voltage Transformer Calibration System
Short Name ESM II
Principle Comparison Method
rel. ext. (k=2) Measurement Uncertainty 2 µV/V up to 100 µV/V
2 µrad up to 50 µrad
Measuring Conditions

30 V up to 300 kV
16.7 Hz, 50 Hz, 60 Hz

 

 

 

 

 

 

 

Standard Burden Calibration System

Standard Burden Calibration System
Short Name BME II
Principle Impedance Measurement
rel. ext. (k=2) Measurement Uncertainty 0,1 % up to 1 %
0,1 crad up to 1 crad
Measuring Conditions

0,025 A up to 10 A
10 V up to 320 V
16.7 Hz, 50 Hz, 60 Hz

 

 

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Information

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