OVERVIEW
- As a high-precision testing equipment, the capacitance & tan delta tester is mainly used in power plants, substations, and other on-site operation scenarios, and at the same time, meets the demand for high voltage power equipment dielectric loss tangent and capacitance testing in the laboratory environment.
- Our Wrindu capacitance & tan delta tester features an integrated design, which combines a dielectric loss test bridge, a frequency – regulated power supply, a step – up transformer, and a high – stability SF6 standard capacitor.”The step-up transformer steps up the test high-voltage power generated by the internal inverter and then accurately acts on the equipment under test.
- It has a variety of frequency modes, including 50.0Hz, 47.5Hz/52.5Hz, 45.0Hz/55.0Hz, 60.0Hz, 57.5Hz/62.5Hz and 55.0Hz/65.0Hz, etc. With the help of digital trapping technology, it can effectively block the interference of the industrial frequency electric field. It overcomes the technical difficulties of accurate measurement in the strong electric field environment, ensuring the accuracy of the test data. It can overcome the technical difficulties of accurate measurement in a strong electric field environment and ensure the accuracy and reliability of test data. In addition, this capacitance & tan delta tester has a significant advantage in the use of scenarios; even after a complete blackout of generator-powered special test occasions, it can still run stably, greatly expanding its scope of application. In addition, equipped with an insulating oil cup and temperature control device, the instrument can also realize the dielectric loss test of insulating oil, fully demonstrating its comprehensive and powerful functions and providing a solid and reliable technical guarantee for the safe and stable operation of high-voltage power equipment.
CHARACTERISTIC
- 1. The instrument is equipped with a full-touch LCD screen; each step is clear, and the operator can use it without professional training. Gently clicking the screen to complete the entire measurement process is an ideal intelligent dielectric loss measurement equipment.
- 2. Built-in calendar chip and large-capacity memory can store 200 groups of data and save them in chronological order. Users can check the history record at any time and support printouts.
- 3. Instrument data can be exported via a U disk for easy management and analysis.
- 4. It Support many kinds of testing methods, including internal high voltage, external high voltage, internal standard, external standard, positive connection method, reverse connection method, and self-excitation method. Under the external standard and external high-voltage positive connection method, a high voltage (more than 10kV) dielectric loss test can be carried out. 5.
- 5. It can accurately measure the dielectric loss and capacitance values of a Capacitive Voltage Transformer (CVT) without detaching its high – voltage leads.
- 6. The instrument adopts the inverse shielding method, which can measure the dielectric loss value and capacitance value of C0 at the upper end of CVT.
- 7. The internal inverter and sampling circuit are controlled by digitalization, and the output voltage is continuously adjustable. 8.
- 8. The capacitance & tan delta tester is equipped with a variety of protection measures, including input voltage fluctuation, high voltage current, output short circuit, power supply failure, over-voltage, over-current, and temperature protection, to ensure the safety and reliability of the equipment. The instrument also has a grounding detection function, which does not allow starting the test without grounding. If the 380V power supply is connected by mistake, the instrument will issue an alarm to prevent damage.
- 9. It can test the dielectric loss and capacitance of C1 and C2 of the fully sealed CVT (Capacitive Voltage Transformer), realizing simultaneous testing. In addition, it can also test the ratio and voltage angle difference of CVT.
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FAQ
Q： What is the capacitance and tan delta test?
A: The tan delta test is crucial for ensuring the secure and reliable operation of transformers. By calculating the dissipation factor and capacitance values, it can assess the insulation performance of bushings and windings, helping to identify potential issues such as degradation or contamination, which may compromise the transformer’s functionality and safety.
Q： What is tan delta for capacitors?
A： Tan delta, or the dissipation factor, represents the ratio between resistive and capacitive currents in a system. In an idealized scenario where a cable has infinite resistance, the current flow becomes purely capacitive and leads the voltage by 90 degrees. This illustrates the cable’s capacitive behaviour without resistive losses. However, real cables have finite resistance, making tan delta testing vital to assess insulation and identify any resistive losses for system reliability.
Q： What is the purpose of the capacitance test?
A： The capacitance test measures the capacitance of a component, such as a capacitor. Key objectives include quality control during manufacturing, verifying components adhere to specifications, detecting faults or degradation, troubleshooting electronic equipment, and optimizing performance in applications where precise capacitance values are critical.
Q： What four factors affect capacitance?
A： Capacitance is affected by four main factors:
1. Surface Area (A): Bigger plate surface area increases capacitance.
2. Distance Between Plates (d): A smaller distance between plates increases capacitance.
3. Dielectric Constant (κ or ε): Higher dielectric constant boosts capacitance.
4. Permittivity of Free Space (ε₀): A constant that influences capacitance in a vacuum or air.
