WDFJZ-V Handheld Arrester Discharge Counter Application Solution​

Lightning arresters are core equipment in power systems for defending against lightning overvoltages and switching overvoltages. The proper operation of their discharge counters directly determines the effectiveness of the arrester's protective function. If a counter fails, maintenance personnel cannot accurately assess the arrester's operational status, potentially leading to serious consequences such as equipment breakdown and power outages.

The WDFJZ-V Handheld Arrester Discharge Counter provides an efficient and precise solution for the testing and maintenance of arrester discharge counters, focusing on four aspects: application scenarios, implementation process, core advantages, and service support, assisting power companies in ensuring the safe and stable operation of the grid.

​I. Solution Applicable Scenarios​

The WDFJZ-V Handheld Arrester Discharge Counter can accurately verify the operational reliability of various types of arrester counters. It is primarily suitable for the following scenarios:

1. ​Regular Power System Inspections​
• ​Substation Arrester Routine Testing:​​ Valve-type arresters (including ordinary silicon carbide valve-type <FZ, FCD>, magnetic blow silicon carbide valve-type <FCZ, FCD>) and metal oxide arresters within substations require quarterly or semi-annual discharge counter operation verification. This device tests whether the counter increments correctly under simulated discharge signals, preventing failure to monitor actual arrester discharges due to counter jamming or malfunction, which could lead to missed fault warnings.
• ​Transmission Line Arrester Inspection:​​ Arresters along transmission lines (e.g., line-type metal oxide arresters) are exposed long-term outdoors. Influenced by environmental factors (e.g., high temperature, humidity, lightning strikes), counters are prone to failure. Maintenance personnel can carry this handheld device for on-site testing to promptly identify counter abnormalities, ensuring the protective function of line arresters during thunderstorms.
2. ​Arrester Installation and Maintenance Acceptance​
• ​New Equipment Installation Acceptance:​​ For newly purchased arresters, before or after installation, power companies need to use this device to verify the operational reliability of the discharge counter. If the counter fails to respond correctly to simulated discharge signals, the equipment can be replaced promptly, preventing faulty arresters from being commissioned and reducing safety risks at the source.
• ​Post-Maintenance Function Verification:​​ After an arrester undergoes overhaul maintenance or component replacement (e.g., counter module replacement), this device should be used for a discharge operation test. Confirming that the counter accurately records discharge events ensures the restored protective function of the maintained arrester, avoiding counter failure due to inadequate maintenance.
3. ​Laboratory Testing and Third-Party Services​
• ​Arrester Production Quality Inspection:​​ Arrester manufacturers can use this device in the laboratory for batch testing of discharge counters on finished products, ensuring the counting accuracy of each unit meets industry standards (e.g., reliable counting when discharge current exceeds 100A), thereby improving product qualification rates.
• ​Third-Party Testing Services:​​ When providing arrester performance testing services to clients, third-party inspection agencies can leverage the portability and wide-scenario adaptability of this device to perform counter operation verification either on the client's site or in the laboratory, providing clients with accurate test reports and assisting them in compliant maintenance.

​II. Solution Implementation Process​

1. ​Preparation Phase: Define Requirements and Debug Equipment​
• ​Requirement Confirmation:​​ Based on the application scenario (e.g., substation inspection, new equipment acceptance), define the testing standards. For example, substation inspection may require confirming the counter operates normally under an adjustable output voltage of 200~1600V, with a discharge current response threshold not less than 100A.
• ​Equipment Debugging:​​
1. Check power supply status: The device is powered by a rechargeable lithium battery; ensure sufficient charge (recommended to charge fully beforehand to meet all-day field testing needs).
2. Connect test leads: According to the user manual, connect one end of the test lead to the device's output terminal and the other end to the signal interface of the arrester discharge counter, ensuring secure connections and no short circuits.
3. Set test parameters: Adjust the output voltage (200~1600V adjustable) based on the arrester type (e.g., metal oxide, silicon carbide valve-type). Confirm the device's rated frequency (50Hz) matches the grid frequency at the site to avoid frequency mismatch affecting results.
2. ​Testing Phase: Simulate Discharge and Verify Operation​
• ​Simulated Discharge Test:​​ Activate the device's discharge test function. The device outputs a simulated arrester discharge signal (discharge current > 100A). Observe the operation of the arrester discharge counter:

• If the counter increments normally (e.g., records 1 discharge), the counter is deemed reliable.
• If the counter shows no response or incorrect counting, mark the arrester as faulty, suspend its operation, and proceed with further investigation.

• ​Data Recording and Repeated Verification:​​
1. Record test data: Include test time, arrester ID, device output voltage, discharge current, counter operation result (Normal / Abnormal), etc., for future traceability.
2. Repeat test: For counters showing abnormal results initially, adjust the output voltage (e.g., from 500V to 800V) and repeat the test 2-3 times to rule out misjudgment due to operational error, ensuring accuracy.
1. ​Post-Testing Phase: Abnormal Handling and Equipment Maintenance​
• ​Abnormal Handling:​​

• If the abnormality is due to poor contact, re-tighten the signal interface connections and retest.
• If the counter's internal module is faulty (e.g., circuit damage, mechanical jamming), replace the counter module. After replacement, use the device to re-verify until the counter operates normally.
• For arresters consistently showing abnormalities after multiple tests, take them out of service promptly and schedule repair to prevent loss of protection during thunderstorms.

• ​Equipment Maintenance:​​
1. After testing, turn off the device power, and neatly coil the test leads to prevent damage from tangling.
2. Clean the device exterior: Wipe the surface with a dry, soft cloth, especially the output ports, to prevent dust accumulation causing poor contact.
3. Battery maintenance: If the device is unused for extended periods, charge the lithium battery periodically (e.g., monthly) to prevent damage from deep discharge and extend battery life.

​III. Solution Core Advantages​

1. ​Performance Advantages: Precise, Reliable, Highly Compatible​
• ​Wide Voltage Range & High Current Output:​​ Adjustable output voltage from 200~1600V, with discharge current > 100A, covering the testing needs for counters of most arrester types (e.g., metal oxide, silicon carbide valve-type), avoiding incomplete testing due to insufficient voltage or current.
• ​Stable Frequency & Operation Response:​​ Rated frequency of 50Hz, consistent with China's grid frequency, ensures simulated discharge signals match the actual grid environment, making test results more representative.
2. ​Scenario Adaptability Advantages: Portable, Flexible, Easy to Operate​
• ​Handheld Design for Multiple Scenarios:​​ Compact dimensions (238mm×134mm×45mm), lightweight (weight not specified, but estimated ~1-2kg based on handheld design), facilitates portability for maintenance personnel to substations, transmission line towers, and other outdoor locations. It can also be used flexibly in labs and workshops, freeing users from fixed testing equipment limitations.
• ​Lithium Battery Power, Unrestricted by Power Source:​​ Powered by a rechargeable lithium battery, eliminating dependence on external power sources. Suitable for outdoor scenarios without power (e.g., remote area transmission line inspection). A single charge can meet all-day testing needs, improving maintenance efficiency.
3. ​Service Advantages: Full Lifecycle Support​
• ​Full-Process Service Support:​​ The supplier provides "Whole-life care management services," covering equipment procurement, operation training, maintenance calibration, and after-sales repair. For example, post-purchase technical personnel can provide on-site training to ensure proficiency. For device failures, the response time is ≤4 hours, with 100% on-time delivery of repair parts, minimizing downtime.
• ​Compliance & Professionalism Assurance:​​ The supplier (Zhejiang Wan'en Information Technology Co., Ltd.) has passed platform qualification certification and technical assessment. The device complies with power industry testing standards, avoiding invalid test data or safety incidents due to non-compliant equipment.

​IV. Solution Expected Value​

1. ​Safety Assurance:​​ Through regular testing of arrester discharge counters, abnormalities are identified and addressed promptly, ensuring arresters operate correctly during lightning and switching overvoltages, protecting core equipment like transformers and circuit breakers from damage, and reducing the incidence of grid outages.
2. ​Cost Reduction:​​
• ​Reduced Failure Repair Costs:​​ Prevents loss of arrester protection due to counter failure, which could lead to expensive equipment damage (e.g., transformer breakdown repair costs can reach hundreds of thousands of RMB).
• ​Improved Maintenance Efficiency:​​ The handheld design and lithium battery power reduce equipment搬运 and power setup time. Testing time per arrester is short (estimated ~5-10 minutes/unit), improving efficiency by over 50% compared to traditional testing equipment.
• ​Extended Equipment Lifespan:​​ Timely counter maintenance prevents long-term operation of arresters with faulty counters, extending the overall service life of the arrester (e.g., from 8 years to 10 years).
3. ​Compliance Fulfillment:​​ Provides power companies with test data compliant with industry standards, assisting them in passing grid safety inspections, equipment maintenance audits, and other compliance reviews, avoiding regulatory penalties due to inadequate testing.

​V. Supplier Support and Service Commitment​

• ​Supplier Qualifications:​​ Zhejiang Wan'en Information Technology Co., Ltd. possesses over 1000㎡ of workspace, annual export volume exceeding $300 million USD, demonstrating stable production capacity and global service experience, ensuring timely equipment supply and efficient after-sales response.
• ​Service Commitment:​​
• Provides free maintenance and calibration services within the warranty period, ensuring long-term stability of device testing accuracy.
• Offers a technical consultation hotline for immediate support when operational issues arise.
• Provides personalized services based on specific client needs (e.g., custom test report templates, batch equipment training) to enhance solution adaptability.