The lightning arrester discharge counter is the core device for recording the number of actions of lightning overvoltage and operational overvoltage. Its operating status is an important basis for evaluating the overall performance of the lightning arrester. The lightning arrester discharge counter action tester is a portable on-site calibration device, mainly used for detecting the action reliability of the discharge counter. This article systematically sorts out the core technical points and usage norms of this testing instrument from three dimensions: application scenarios, equipment selection, and test procedures.
I. Application Scenarios
The lightning arrester discharge counter action tester is applicable to on-site maintenance operations in power plants and substations, and can also be used in various test and maintenance scenarios such as equipment repair workshops and high-voltage laboratories. It can be used to calibrate various discharge recorders for valve-type and metal oxide lightning arresters.
The core application value of the equipment is: by simulating real lightning current impact conditions, it can test the stability and reliability of the discharge counter’s action, obtain precise test data, provide core data support for the assessment of the lightning arrester’s operating status and fault determination, and ensure the safe and stable operation of high-voltage power equipment.
II. Selection Key Points
The selection of the lightning arrester discharge counter action tester should focus on core technical parameters, functional configuration, on-site adaptability, and safety reliability. Among them, the equipment’s output characteristics are the primary criterion for selection. The specific selection standards are as follows:
(1) Core Output Parameters
The waveform output of the equipment must comply with industry standards and must support the output of the 8/20μs standard lightning current waveform. This waveform closely matches the characteristics of natural real lightning and is the benchmark waveform for counter calibration.
The current amplitude range must meet the requirements of multiple scenarios for calibration. Commonly, it needs to cover the 100A, 500A, and 1000A common ranges. To adapt to mainstream models of discharge counters on the market, the equipment must be equipped with at least two core current ranges of 500A and 1000A. If the equipment supports DC testing mode, its output voltage must reach the thousands of volts standard of the thousands of volts level, meeting the requirements of DC calibration conditions.
(2) Function and Automation Configuration
The equipment should be equipped with complete basic testing functions, including multiple current adjustment ranges, diverse single-shot/continuous testing modes, and intuitive indication of discharge actions, to meet the requirements of conventional manual calibration.
It is preferred to select equipment with intelligent and automated functions, equipped with automatic current rise, automatic threshold determination, data storage and export functions (supporting USB, Bluetooth transmission methods), which can significantly improve the efficiency of batch equipment testing, simplify the data sorting and analysis process, and be adapted to large-scale on-site maintenance operations.
(3) Portability and Power Supply Mode
It is suitable for outdoor and mobile operation scenarios. The equipment should preferentially adopt a dual-power supply mode that can be connected to AC220V mains power for fixed-scenario testing or rely on an internal large-capacity lithium battery for outdoor operations without external power supply.
The overall design of the equipment should be lightweight and miniaturized, with the recommended overall weight controlled within 6kg. The structure is compact, allowing for single-person carrying and independent operation, and suitable for various on-site narrow operation environments.
(4) Safety and Operational Reliability
The equipment should be equipped with complete safety protection mechanisms, integrating core protection functions such as high-voltage isolation, overcurrent protection, overvoltage protection, and grounding protection, to prevent safety hazards during testing and ensure the safety of operators and equipment.
The core components of the equipment should use industrial-grade components, with strong environmental adaptability, capable of stable operation in the wide temperature range of -10℃ to 50℃ on-site, and having excellent anti-electromagnetic interference ability, capable of adapting to the complex electromagnetic environment of high-voltage sites, ensuring accurate test data and stable equipment operation.
III. Test Standards and Operating Procedures The calibration test of the arrester discharge counter must strictly follow the current national and power industry standards. The core execution standards include “AC Non-Contact Metal Oxide Surge Arrester”, “Field Insulation Test Implementation Guidelines Part 5: Arrester Test”, “Transmission and Transformation Equipment Condition-based Maintenance Test Regulations”, and “Monitoring Devices for Metal Oxide Surge Arrester”.
(1) Test cycle requirements
The regular test cycle is 1 to 3 years. It can be carried out simultaneously with the annual power outage maintenance of the arrester. During the thunderstorm season, when the counter shows abnormal actions, or when the equipment condition fluctuates, special calibration tests should be promptly conducted to promptly identify equipment hazards.
(2) Standard testing process
1. Safety preparation
Before the test, confirm that the arrester is completely de-energized, strictly perform the voltage check operation, reliably connect the working ground wire, and short-circuit the arrester body to completely eliminate residual voltage. Implement all safety protection measures.
2. Equipment connection
Connect the output end of the tester to the input end of the counter, and the grounding end of the equipment needs to be firmly connected to the grounding end of the counter or the earth to ensure stable connection and reliable grounding, avoiding poor contact affecting the test results.
3. Parameter setting
Adjust the equipment parameters, select the 8/20μs standard lightning impulse waveform, the initial test current gear should preferably be 100A or 500A, and can be flexibly adjusted according to the counter model.
4. Action test
Conduct 3 to 5 shock tests continuously, observe the operation status of the counter throughout the process, record the counter’s counting situation successively, and check whether the counting increment after each shock is normal.
(3) Test qualification criteria
Under the standard impulse current condition, the tested counter must 100% reliably act, the counting is accurate, the increment is normal, there are no jamming, counting jump, missed counting, or refusal to act abnormalities, and there are no mechanical damage or electrical faults in the counter after the test, which means the test is qualified.
(4) Handover test requirements
In the power equipment handover acceptance process, the action reliability calibration of the counter should be listed as a mandatory inspection item. Through standardized tests, verify the operation performance of the counter for new installed surge arresters, ensure that the new equipment can normally monitor the number of overvoltage actions, and guarantee that the equipment operation status is compliant and reliable.
Post time: Jun-30-2026