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Electric calibration solutions for electromobility

From current transformers for measuring large motor currents to battery test systems – e-mobility demands new quality standards. Testo Industrial Services provides the appropriate DAkkS-accredited calibration and testing solutions.

New concepts and developments in the field of e-mobility are changing the requirements and demand for calibrating electrical measuring devices. Whether it's motor currents measured with current transformers or batteries tested with modern systems – Testo Industrial Services GmbH has expanded its lab with accredited calibration procedures for electrical quantities, specifically tailored to the needs of e-mobility.

Calibration of your current transformers

To supply the high energy levels required for the dynamic movement of an electric vehicle, large currents are needed – both during operation and charging. Current transformers enable these currents to be converted into usable electrical signals (proportional current or voltage signals) with minimal loss.

Electrical calibration

At our specially developed test station for transformers, we perform calibrations for your current transformers. We offer ISO and DAkkS-accredited calibrations in the following ranges:
 

  •  DC: up to 4000 A
  • AC: 1 A to 120 A at 40 Hz to 2 kHz
    >120 A to 600 A at 40 Hz to 400 Hz
    >600 A to 1000 A at 40 Hz to 65 Hz

We also calibrate non-sinusoidal, dynamic signal forms using a sampling method. Our custom-built setup, made of 40 kg of pure copper with defined wiring, minimizes interference and increases current-carrying capacity. The setup is easy to dismantle, allowing for quick integration of the test object and optimized calibration flow.

Calibration of power meters and analyzers

Calibration is performed directly using three specially equipped stations with high-precision calibrators. DAkkS calibrations are available in the following ranges:

Electrical calibration of power meters
  • DC voltage: 10 V to 1100
  • DC current: 0 to 1000 A at max. 1000 kWs
  • AC voltage: 0 to 1000 V at max. 1 MHz
  • AC current: 0 to 100 A at max. 10 kHz

Active, reactive, and apparent power: 50 µW/µVar/µVA to 80 kW/kVar/kVA at max. 10 kHz. All measurements are traceable to our in-house reference lab.

HV testing

With the trend toward 800 V technology, safety requirements for high-voltage components in EVs are increasing. To prevent risks like voltage breakdowns due to damaged insulation or connectors, regular testing of HV measuring boxes and adapter cable sets is essential.

HV testing of adapters in a spherical bath

We offer dielectric strength/insulation testing in our accredited lab according to DIN EN IEC 61010-031:2024-05 using a water bath. Voltage ranges up to 5 kV are supported. Insulation tests can be performed on modules, adapters, cables, and test equipment.

Battery test systems

High-voltage batteries are at the heart of an electric car and provide the energy to keep it moving. This makes extensive testing in the development phases and beyond all the more important. The high-precision measuring systems used for this purpose have several safety features such as overvoltage or overcurrent protection as well as external parameter recognition. Regular calibration of the current, voltage and resistance values for AC and DC of these devices is therefore essential. We calibrate your battery test systems and are also able to analyze dynamic parameters such as charging time and signal characteristics for you. Additionally, we are expanding our accreditation to include AC resistance in the milliohm range.

Additional electric calibration solutions

We offer even more: Our DAkkS-accredited electrical lab is tailored to the needs of e-mobility and guarantees maximum precision and reliability.

Our portfolio also includes:

  • Signal Amplifiers and Modules: Custom calibration of current, voltage, temperature, and frequency – even under variable ambient conditions.
  • Current Shunts: Precise DAkkS calibration in AC and DC up to 1000 A, frequency up to 10 kHz.
  • Energy and Current Meters: High-accuracy calibration per phase up to 100 A, 1000 V, and 400 Hz.
  • And much more.