Variable Frequency Series Resonance Withstand Voltage Test Device with 0-100kV Test Voltage Range, Microcomputer Control, and Digital LCD Display

The variable-frequency series resonance withstand voltage testing equipment produced by our company boasts significant advantages in the field of AC withstand voltage testing. Utilizing advanced variable-frequency series resonance technology and proprietary core technologies with independent intellectual property rights, it achieves a measurement accuracy of up to 0.05%, meeting testing requirements for equipment across the entire voltage range from 10 kV to 500 kV. The equipment incorporates an adaptive temperature and humidity algorithm, ensuring data stability under extreme conditions ranging from -20°C to 50°C, with an error rate 30% lower than industry standards. Employing a dual-chip architecture combining DSP and FPGA, it dynamically tracks load capacitance changes in real-time through a frequency tracking algorithm, maintaining resonance frequency accuracy within ±0.05 Hz. The equipment has obtained ISO9001 Quality Management System certification, 3C certification, China Metrology Accreditation (CMA), as well as certification from the State Grid's Recommended Catalog for Intelligent Testing Equipment and TUV Rheinland's "Industrial AI Excellence" certification.

The working principle of the variable-frequency series resonance withstand voltage tester is based on the characteristics of series resonance. By adjusting the power supply frequency, the test circuit reaches a resonant state, thereby generating high voltage for withstand voltage testing of electrical equipment.

• Rated output voltage: Typically ranges from 10 kV to 100 kV, with the exact value depending on the equipment's design purpose.
• Output frequency range: Typically between 30 Hz and 300 Hz; some devices may support a wider frequency range to accommodate various types of test objects.
• Resonant inductance: The inductance value in a resonant circuit typically ranges from several hundred to several thousand henries, depending on the device design.
• Resonant capacitance: The capacitance value in a resonant circuit typically ranges from tens to hundreds of nanfarads, depending on the characteristics of the test object.
• Maximum output power: typically ranges from several kilowatts to several hundred kilowatts, with the exact value depending on the equipment's design and application requirements.
• Test duration: Typically several minutes, with the exact time determined by the test specifications and requirements.
• Insulation rating: The equipment is typically required to possess excellent insulation performance, with the insulation voltage rating generally being 1.5 times or higher than the rated output voltage.
• Safety protection functions: include overvoltage, overcurrent, short circuit, and overheating protection to ensure the safety of equipment and test subjects.
• Operating Environment: The typical operating temperature range is -10°C to +40°C, with a relative humidity of ≤85% (no condensation).
• Control method: Typically employs an intelligent control system that supports remote monitoring, data recording, and analysis functions.

1. Inverter: Function: The frequency converter is used to regulate the frequency of the input power supply, converting it into a frequency range suitable for resonance testing (typically between 30 Hz and 300 Hz). By adjusting the frequency, the frequency converter enables the system to reach resonance, thereby generating high voltage on the test object.
2. Resonant inductor: Function: The resonant inductor and the capacitance of the test object jointly form a resonant circuit, primarily used for storing electrical energy and establishing resonance conditions. When the circuit reaches resonance, a high voltage can be generated across the test object without consuming a large amount of current.
3. Resonant capacitance: Function: When used in conjunction with a resonant inductor, it forms an LC resonant circuit. The resonant capacitor is employed to adjust and match the circuit's resonant frequency, ensuring optimal resonant performance during testing.
4. Test subject: Function: The insulation performance of the tested equipment (e.g., transformers, switchgear, insulators, etc.) is evaluated by applying high voltage.
5. High-voltage output section: Function: Deliver high voltage from the resonant circuit to the test object, typically involving high-voltage output cables and connectors to ensure safe high-voltage transmission.
6. Monitoring System: Function: Real-time monitoring of parameters such as voltage, current, and frequency, with data fed back to the control system to ensure the safety and effectiveness of the testing process.
7. Control System: Function: Responsible for the operation and control of the entire device, including setting test parameters, initiating and terminating tests, recording data, and triggering alarms. Modern devices are typically equipped with a Human-Machine Interface (HMI) to facilitate operation and monitoring.
8. Protection Device: Function: Provides various safety protection features, including overvoltage, overcurrent, short-circuit, and overheat protection, to ensure the safety of both the equipment and the test subjects.