The Anti-interference Automatic Dielectric Loss Tester employs variable-frequency power supply technology, utilizing microcontrollers and advanced electronics to perform automatic frequency conversion, analog-to-digital conversion, and data processing. This design ensures robust anti-interference capabilities, rapid testing speeds, high measurement accuracy, and user-friendly operation.

The variable-frequency power supply features a high-power switching power source, capable of outputting pure sine waves at single frequencies (45 Hz to 65 Hz) as well as dual frequencies (47.5 Hz/52.5 Hz, 45.0 Hz/55.0 Hz, 57.5 Hz/62.5 Hz, and 55.0 Hz/65.0 Hz), with automatic voltage boosting. It automatically filters out 50 Hz interference, making it ideally suited for on-site testing in environments with high electromagnetic interference, such as substations.

Key Features:

1. Supports the self-excitation method for testing Capacitive Voltage Transformers (CVTs), allowing for simultaneous measurement of both C1 and C2 capacitance and dielectric loss (tgδ) with a single wiring setup.

2. Features reverse-wiring capabilities with low-voltage and high-voltage shielding functions; this enables non-dismantling dielectric loss measurement of the C11 unit at 10 kV using the reverse-wiring method, even when the CVT busbar is grounded.

3. Includes measurement functions for tests involving externally applied voltages and externally connected standard capacitors (CN).

4. Incorporates a CVT transformation ratio measurement function, meeting the requirements for transformation ratio testing of CVT devices rated from 35 kV to 500 kV.

5. Features an automatic LCR measurement function, enabling the measurement of inductance, capacitance, and resistance.

6. Employs variable-frequency technology to eliminate on-site 50 Hz power-frequency interference, ensuring the acquisition of reliable data even in environments with strong electromagnetic interference.

7. Includes an overcurrent protection function to prevent damage to the instrument in the event of a short circuit or breakdown of the test specimen.

8. Contains built-in standard capacitors and a high-voltage power supply, facilitating on-site testing and minimizing the complexity of field wiring.

9. Features an extra-large LCD screen for simple operation, guiding the user through the testing process via Chinese-language menu prompts.

10. Each functional interface within the instrument displays a corresponding wiring diagram, greatly simplifying the wiring process for the operator.

11. Supports language switching between Chinese and English.