Lightning Arrester Discharge Counter is a high-voltage electrical device used to monitor the discharge actions of lightning arresters. It consists of nonlinear resistors, electromagnetic counters, and some electronic components. Under normal operating voltage, the leakage current flowing through the counter is very small, and the counter does not act. When the lightning arrester is subjected to lightning waves, switching surges, and power frequency overvoltages, the strong working current passes through the nonlinear resistor of the counter. After DC conversion, it discharges to the electromagnetic coil, causing the counter to increment once, thus recording the number of times the lightning arrester has acted.

In terms of structure, the counter uses resistance chips for pressure sensing, electromagnetic coils for operation, and displays via a counter. It is sealed with a transparent glass cover, sealing rubber gaskets, baseplate, and flanges. The high-voltage output terminal is led out from the center of the baseplate. Due to poor sealing, moisture can enter during operation, causing internal components to rust and preventing normal operation. The reliability of the counter's action is crucial for the power system as it records the number of lightning strikes that the lightning arrester experiences during normal operation. It provides essential data for power system personnel to inspect the lightning arrester. Therefore, the regulations stipulate that it should be checked at least once a year.

Lightning Arrester Discharge Counter Tester is primarily used to verify the reliability of various lightning arrester counters and to check the integrity of leakage current meters in monitoring instruments. It is suitable for valve-type lightning arresters (including silicon carbide ordinary valve types and silicon carbide magnetic blow-off valve types , as well as zinc oxide lightning arresters). It complies with the requirements of the power industry standard DL474.5-92 "Field Insulation Test Implementation Guide - Lightning Arrester Test". This tester is applicable for testing under various conditions such as substations, repair workshops, manufacturers, and laboratories. It replaces traditional bulky test instruments and methods, extensively used for testing the operation and current performance of lightning arrester counters.

1. Handheld Device: This unit is a handheld terminal, compact and reliable, supporting one-button power on/off.
2. Dual Functionality: Capable of verifying both the operation of counters and the integrity of leakage current meters.
3. Color Touchscreen: Features a 320×240 high-definition color touchscreen for intuitive human-machine interaction.
4. Built-in Lithium Battery: Comes standard with a high-energy lithium-ion battery, ideal for use in environments without a power source.
5. Built-in Calendar Clock: Includes an internal calendar clock to provide time references for printing and saving data.
6. Temperature and Humidity Measurement: Displays precise current temperature and humidity data.
7. Large Data Storage: Equipped with large-capacity storage for extensive data storage. It supports data storage, browsing, and has a power failure protection function.
8. Data Export via USB Drive: Features a USB drive export function to save data as Word files.
9. Bluetooth Control and Data Upload: Standard equipped with Bluetooth functionality and an Android Bluetooth app, allowing control, data upload, and Word file generation via a smartphone or tablet.
10. Built-in Training Materials: The screen includes various wiring methods to guide on-site usage.
11. Chinese Input for Test Information: Supports Chinese input for related site, equipment, personnel, remarks, etc., facilitating identification and saving of test data and easy printing.
12. Language Switching: Directly switch between Chinese and English interfaces (optional), compatible with both domestic and international usage scenarios.
13. Printer Support: Optional external wired printer or wireless Bluetooth printer.
14. Convenient Testing: Comes with a set of test leads and a retractable lead, meeting different testing requirements.
15. Flexible Communication: Optional serial RS232 or RS485 MODBUS communication, and IoT MQTT protocol for test control and data upload.
16. High-Speed Sampling: High sampling frequency with advanced digital signal processing technology, strong anti-interference performance, and extremely accurate measurement results.
17. Safety and Reliability: The instrument casing is made of ABS plastic, with no exposed metal parts during high-voltage output, ensuring operator safety and preventing electric shock.
18. Portability: Handheld design with dustproof and corrosion-resistant integrated housing, small size, light weight, and easy to carry.
19. Optional Features: The standard version does not include optional features; customers can customize based on their needs.

1. Output Voltage: DC 10～1800V adjustable (step value 1V), suitable for various counter activation voltages.
2. Capacitance: 10μF
3. Discharge Current: Greater than 100A, output impulse current conforms to the 8/20μS waveform.
4. Current Calibration:
   • Adjustable calibration current output DC 0.10～30mA (set according to the maximum current value of the meter).
   • Five-step adjustable settings available.
   • Automatically outputs and stops according to set values.
   • Peak/Effective value selectable for different types of monitoring instrument meter calibration.
   • Output accuracy: 1%.
5. Counter Reset:
   • Maximum setting limit up to 999.
   • Automatically operates and counts after setting.
   • Automatically stops after clearing without manual intervention.
6. Storage Capacity: Equipped with a large-capacity storage chip, capable of storing up to 10,000 data entries.
7. Power Supply: Rechargeable lithium battery, fully charged once can perform over 2000 action tests.
8. Battery Capacity: 8.4V/4000mAh.
9. Instrument Dimensions: 172mm×223mm×68mm.
10. Instrument Weight: 1kg.