Power frequency dielectric constant testerIt is a specialized instrument used to measure the dielectric properties of insulation materials under AC electric fields at power frequencies (usually 50 Hz or 60 Hz), mainly used to evaluate the dielectric constant (εᵣ) and dielectric loss tangent (tan δ) of materials. These two parameters are key indicators for measuring the performance of electrical insulation materials, widely used in fields such as power equipment manufacturing, high-voltage testing, cable, transformer oil, insulator, capacitor, and composite insulation material research and quality control.
This tester operates based on the principles of bridge method, resonance method, or digital impedance analysis. Under power frequency conditions, the tested sample is placed in a standard test electrode system, and a stable low-voltage AC signal is applied. Through high-precision sensors and signal processing circuits, the phase difference between the current and voltage flowing through the sample is collected in real time, and its complex dielectric constant and loss factor are calculated. Modern power frequency dielectric constant testers often use digital automatic balance bridge or broadband impedance analysis technology, which have functions such as automatic calibration, temperature compensation, data storage, and interface output. They are easy to operate, have good repeatability, and high measurement accuracy.
Power frequency dielectric constant testerIts core functions can be summarized as follows:
1. Measurement of dielectric constant
Functional definition: Dielectric constant is a physical quantity that measures a material's ability to store electrical energy in an electric field, reflecting the material's response characteristics to the electric field. The larger the value, the stronger the material's ability to store electrical energy.
Application Scenario:
Electronic material research and development: Optimize the formula of capacitor dielectric materials to improve capacitance value (such as high-frequency communication substrate materials requiring low dielectric constant to reduce signal loss).
Power equipment testing: Evaluate the dielectric properties of insulation materials such as transformers and insulators to ensure safe operation of equipment.
Materials Science: Analyze the electrical properties of materials such as ceramics, plastics, and films, and explore their structural and physicochemical characteristics.
2. Measurement of dielectric loss factor
Functional definition: The dielectric loss factor (tan δ) reflects the degree to which a material loses electrical energy due to heat generation in an electric field, and is a key indicator for evaluating the insulation performance of materials. The smaller the value, the less energy is consumed by the material.
Application Scenario:
Power industry: Detect the dielectric loss of materials such as cables and insulation paper to prevent faults such as leakage and breakdown.
High frequency communication: Evaluate the loss characteristics of high-frequency substrate materials to ensure signal transmission stability.
In the field of new energy, optimize the energy loss of materials such as conductive silicone in solar panels and energy storage batteries.
3. Broadband electrical performance analysis
Function extension: Some high-D testers support wideband measurement from low frequency (such as 10kHz) to high frequency (such as 110MHz), covering industrial frequency and high-frequency microwave scenarios.
Application Scenario:
Low frequency capacitor materials: measure the low-frequency dielectric properties of insulation materials in power equipment.
High frequency communication substrate: Analyze the high-frequency response characteristics of 5G and 6G communication materials.
Microwave functional materials: evaluate the electrical performance of microwave devices such as radar and satellites.
4. High precision and automated measurement
Technical characteristics:
Digital signal processing: using DDS digital synthesis signal source and high-resolution ADC sampling system, the accuracy can reach one thousandth (dielectric constant) or one ten thousandth (dielectric loss).
Automatic calibration and compensation: eliminate the influence of environmental factors (such as temperature and humidity) on measurement results.
Intelligent operation: supports functions such as automatic scanning of resonance points, range switching, and qualification judgment, equipped with an LCD display screen to visualize the operation process.
Application Scenario:
Real time detection of production line: combined with automation equipment, achieve rapid screening of material properties.
Research experiment: Provide high-precision data support and simplify traditional testing processes.
5. Multi form sample adaptation
Fixture Design: Provides various electrode fixtures such as flat plates and cylinders, suitable for different forms of samples such as solids, liquids, and films.
Application Scenario:
Solid materials: measure block or sheet samples such as ceramics, plastics, epoxy boards, etc.
Liquid materials: Analyze the dielectric properties of liquid samples such as insulating oil and chemical liquids.
Thin film materials: Detect micro thickness samples such as capacitor films and high-frequency substrate films.
6. Temperature and frequency scanning function
Function extension: Supports temperature scanning (such as 0-40 ℃) and frequency scanning (such as 10kHz-110MHz), analyzing the variation of material properties with environmental parameters.
Application Scenario:
Material research and development: Study the correlation between dielectric constant, temperature, and frequency, and optimize material formulations.
Environmental adaptability testing: Evaluating the stability of materials in extreme environments such as high temperature and high frequency.