- Metrology Lab by Hioki
- Dynamic impedance testing solutions
- Insulation evaluation testing solutions
- Automatic partial discharge (RPDIV) using impulse voltages as defined in IEC 61934
- Partial Discharge Testing of Motor Stators Using an Impulse Tester and Oscilloscope
- Partial Discharge Testing of Motor Stators Using a Withstand Voltage Tester and Oscilloscope
- Automatic impulse testing of motor stators using high-voltage relays
- IEC 60851-5 Winding Wire Dielectric Tangent (tanδ) Testing
- Testing of Dielectric Constant and Dielectric Loss Tangent Temperature Characteristics in Electrical Insulating Materials
- Equipment at Metrology Lab
- New Arrivals
Metrology Lab by Hioki
Trends in power electronics products are moving in the direction of high voltage and high current. Many of our customers’ requests stem from high voltage and high current environments.
Metrology Lab, run by Hioki, is a market leader in two evaluation methods: electrical insulation evaluation and dynamic impedance. Needs for these topics are increasing due to recent evolution of power electronics. Our goal is to establish new evaluation technology and disseminate solutions.
Please use the form at the bottom of the page for inquires about the solutions posted on this site, to consult about these topics, and to request sample tests.
Dynamic impedance testing solutions : Fuel cells, electrolyzers for hydrogen production, power electronic components such as capacitors and coils
Insulation evaluation testing solutions : Insulation test / partial discharge test of motors, power modules, and electrical insulation materials
Dynamic impedance testing solutions
We certified that a Power Analyzer can be used to perform high-accuracy DC current superposition testing (DC current bias testing) of high-current coils.
Insulation evaluation testing solutions
With conventional impulse testers, it is difficult to automatically perform partial discharge (RPDIV) testing as defined in IEC 61934. Sequence Maker, a free Excel add-in, quickly creates programs that make it possible to automate such testing.
It’s possible to check for insulation defects in motor stators by observing current waveforms during impulse testing. If there are insulation defects between coils, partial discharges will occur at a lower voltage.
It’s possible to check for insulation defects in motor stators by observing current waveforms during withstand voltage testing. If there are insulation defects between a coil and the core, partial discharges will occur at a lower voltage.
When the test voltage for impulse testing of motor stators exceeds 1500 V, it becomes difficult to obtain relays for use in switching test circuits. Consequently, such tests rely on manual measurement or manual switches. This application proposes an approach for automating impulse testing of stators.
Enamel wires are used in motor windings. As part of R&D and product inspections by enamel wire manufacturers as well as acceptance inspections and material development by motor manufacturers, engineers test the performance of enamel wire by measuring its dielectric tangent (tanδ) as set forth in IEC 60851-5.
Demand is growing for the ability to test the dielectric constant and dielectric loss tangent of electrical insulating materials used in EV and power electronics applications in high-temperature environments. Measurement electrodes from KEYCOM can be combined with Hioki’s LCR meters to meet this need.
Equipment at Metrology Lab
A list of measuring instruments owned by Metrology Lab. Measuring instruments not on the list can be prepared if they are Hioki product.
|Measuring instrument name||Model / Manufacturer||Application example|
|Power analyzer||PW6001 / Hioki||Impedance measurement of batteries, fuel cells, and water electrolysis cells for hydrogen production|
|High precision current sensor||Various / Hioki||For impedance measurement, DC/AC current measurement|
|Bipolar power supply||Various / manufacturers||Charging/discharging device, DC/AC power supply, measurement power supply|
|High accuracy resistance tester||RM3545 / Hioki||For resistance measurement|
|LCR meter||IM3570 / Hioki||LCR measurement, measurement signal level / frequency sweep|
|Withstanding voltage / insulation resistance tester||3153 / Hioki||AC DC withstand voltage test, insulation resistance test|
|Impulse tester||ST4030A / Hioki||Interlayer short circuit detection test, partial discharge test|
|Digital oscilloscope||MDO4000 / Tektronix||Partial discharge waveform for observation|
|High voltage probe||Various / manufacturers||Partial discharge waveform for observation|
|High frequency current probe||Various / manufacturers||Partial discharge waveform for observation|
|May 10, 2022||IEC 60851-5 Winding Wire Dielectric Tangent (tanδ) Testing|
|May 10, 2022|
|October 21, 2021||DC Current Superposition Testing of Coils Using a Power Analyzer|
|October 12, 2021||Automatic impulse testing of motor stators using high-voltage relays|
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Manager Administration Division
HIOKI E.E. CORPORATION
81 Koizumi, Ueda-shi, Nagano 386-1192
日置電機株式会社 総務課 個人情報担当〒386-1192 上田市小泉81番地 TEL 0268-28-0550