Surge Arrester Discharge Counter Tester, 2-in-1 Lithium-Powered Portable Arrester Counter Calibrator

Surge arrester discharge counters are critical devices in power systems that record lightning strike operation times of metal-oxide surge arresters. Their operational reliability directly affects accurate assessment of arrester operating status and traceability analysis of lightning damage. According to power safety regulations, arrester counters must undergo annual operational reliability verification before the thunderstorm season, along with calibration of the leakage current meter on the online monitor to ensure accurate monitoring data.

Traditional field calibration methods suffer from bulky equipment, single functionality, and complicated wiring: impulse method counter testing and DC method ammeter calibration often require two separate devices, with inconvenient on-site wiring changes and safety hazards. Our introduces the device surge arrester discharge counter tester, innovatively integrating both counter operation testing and leakage ammeter calibration in one unit. Test modes switch automatically without rewiring. Powered by built-in lithium battery, outputting standard 8/20μs impulse current above 100A with six adjustable voltage levels, equipped with 0.5-class high-precision ammeter and 3.5-inch LCD display, the 3kg lightweight instrument provides a professional, convenient, and safe integrated solution for annual arrester counter verification.

1.    -in-1 Integrated Design, Auto-Switching Without Rewiring

   The device innovatively integrates two testing functions: surge arrester discharge counter operation reliability testing and arrester leakage ammeter calibration. Both functions share the same set of output terminals, automatically switching test modes through menu selection without repeated on-site disconnection and reconnection of test leads, greatly improving test efficiency while reducing safety risks from high-voltage wiring operations.

   In counter test mode, the instrument outputs a standard 8/20μs impulse current waveform simulating real lightning discharge processes, verifying reliable operation of the counter mechanical counting mechanism. In ammeter calibration mode, it outputs continuously adjustable DC current, using the built-in 0.5-class high-precision ammeter as reference standard for comparison with the arrester online monitor readings to calculate errors and complete calibration. One instrument handles all annual verification items for arrester online monitoring devices, replacing two traditional pieces of equipment.

2.   Standard Impulse Current Output, Six Precise Voltage Levels

   The instrument outputs standard 8/20μs lightning impulse current waveform complying with power testing standards, with peak current above 100A, fully meeting the requirements of the Power Equipment Preventive Testing Code for arrester counter verification. Ten consecutive reliable operations indicate passing status, fully consistent with the inspection method specified in regulations, providing authoritative test results.

   Six adjustable impulse output voltage levels: 2000V, 1800V, 1600V, 1400V, 1200V, and 1000V. Suitable voltage levels can be selected according to sensitivity differences of various counter models such as JS, JS-8, and JS-8A, ensuring reliable trigger activation without damaging counter components due to excessive energy. Trigger count can be set anywhere from 1 to 100 times, with trigger interval adjustable from 2 to 10 seconds, meeting various testing specification requirements.

3.   0.5-Class High-Precision Ammeter, Infinite Adjustment for Accurate Calibration

   The instrument features a built-in 0.5-class high-precision digital ammeter serving as the standard reference source for leakage current calibration. In ammeter calibration mode, output current ranges from 0 to 30mA, infinitely and continuously adjustable via the current control knob. Any current value can be set, with maximum continuous output of 10mA, satisfying full-range calibration needs for various types of arrester online monitor milliamp meters.

   During calibration, connect the instrument output current to the arrester monitor ammeter circuit, adjust current to different scale points, and compare the standard meter readings with the calibrated meter readings to determine accuracy and linearity, providing an accurate basis for error adjustment. Compared with traditional calibration methods using external standard meters, this instrument offers higher integration, simpler wiring, and more convenient on-site operation, especially suitable for substation on-site inspection and calibration.

4.   Lithium Battery Portable Design, Flexible and Efficient Outdoor Operation

   The instrument operates on built-in rechargeable lithium battery, completing all test items without external AC power, especially suitable for outdoor pole towers, remote substations and other environments with difficult power access. The 3.5-inch LCD display intuitively presents function menus and test parameters with direction key operation, user-friendly interface, and short learning curve for testing personnel.

   With dimensions of only 280 by 230 by 150 millimeters and weight of 3 kilograms, it is lightweight and portable with a dedicated carrying case. A single person can carry it to complete arrester counter verification for an entire station. The industrial-grade enclosure features clear and reasonable panel layout with well-defined output terminals, adjustment knobs, and function keys, operable while wearing gloves. Wide operating temperature range adapts to various outdoor climate conditions, making it ideal equipment for pre-thunderstorm season arrester inspections.

5.   Multiple Safety Protections, Reliable and Safe Testing Process

   The instrument features comprehensive safety protection design: clearly marked positive and negative output terminals with red positive connecting to counter upper end and black negative to ground terminal, preventing reverse connection damage. Built-in high-voltage safety protection circuit automatically discharges residual charge after testing to prevent electric shock risk. Reset button allows emergency test interruption at any time for operational safety.

   The operation flow follows safety standards: power-on self-test, parameter setup, confirmation start, automatic testing, and discharge completion, each step with clear status indicators. The counter/current status indicator clearly shows current operating mode to prevent misoperation. Ground terminal ensures reliable instrument grounding, further enhancing high-voltage test safety. The overall design fully considers operator personal safety, complying with power safety work regulations.

1. Step 1: Pre-Test Preparation and Wiring

   Before testing, confirm the surge arrester under test is de-energized with safety measures in place. Disconnect both ends of the arrester discharge counter from the operating circuit. Take out the tester, check appearance integrity and sufficient battery charge. Prepare test leads and alligator clips.

   Wiring method: Connect red test lead to instrument output "+" terminal, attach the alligator clip to the upper end (high-voltage side) of the arrester counter; connect black test lead to instrument output "-" terminal, attach the clip to the counter ground terminal. Reliably ground the instrument ground terminal. Confirm correct wiring with no polarity reversal. Connect the power adapter if charging or extended use is needed. Prepare to begin testing.

2. Step 2: Power On and Function Mode Selection

   Press the power switch, hear a beep confirmation tone, and the operation interface displays the instrument name. Wait approximately 3 seconds for system self-test completion; the interface automatically jumps to the function selection menu.

   The function selection menu contains two options: "Counter Test" and "Ammeter Calibration". Switch between selections using menu up and down keys, with the white cursor indicating the currently selected item. Choose the corresponding mode according to testing requirements, then press the middle confirm key to enter the test interface. In counter test mode, the counter/current indicator shows green with ammeter display off; in ammeter calibration mode, the indicator shows red with ammeter display on.

3. Step 3: Counter Operation Testing Procedure

   Enter the counter test submenu containing two parameter items: "Trigger Count" and "Trigger Interval". The white cursor defaults to the trigger count field; modify the value using parameter up and down keys. Trigger count adjustment range is 1 to 100 times, typically set to 10 times per regulations.

   Press the menu select key to switch to trigger interval option and adjust using parameter keys similarly, with interval range from 2 to 10 seconds. Select the appropriate output voltage level according to counter model using the high-low voltage toggle button, choosing from six voltage levels. After all parameters are set, press confirm to start automatic testing. The instrument outputs impulse current continuously at the set interval; each impulse should advance the counter by one digit. The tester observes counter operation on site.

4. Step 4: Leakage Ammeter Calibration Procedure

   Return to function menu and select "Ammeter Calibration" mode, press confirm to enter. The counter/current indicator turns red and the built-in high-precision ammeter activates. Note that direction keys are disabled in this mode; current magnitude is adjusted infinitely via the current adjustment knob on the panel.

   Slowly rotate the current adjustment knob clockwise to gradually increase output current, while observing both the instrument standard ammeter reading and the arrester online monitor ammeter reading. Select 3 to 5 calibration points across the full range (such as 25%, 50%, 75%, and 100% of full scale), record standard and calibrated readings at each point, and calculate per-point error values. Determine whether the calibrated meter passes based on error magnitude, adjusting the monitor ammeter if necessary. After calibration completion, rotate the knob counterclockwise back to zero.

5. Step 5: Test Wrap-Up and Equipment Storage

   After all test items are complete, press the reset key to terminate output and ensure residual charge in high-voltage capacitors is fully discharged. Press the power switch to turn off the instrument. Disconnect high-voltage side wiring first, then ground side wiring. Neatly coil test leads and return to the accessory bag.

   Check the current counter reading and manually reset to zero if required. Restore the arrester counter operating connections, confirming correct and secure wiring. Clean the instrument surface and verify all knobs and keys are in proper position. Recharge promptly if battery level is low. Return the host, test leads, adapter and all accessories to the dedicated instrument case, verify against the packing list for completeness before proper storage. Charge periodically during long-term storage to prevent battery damage from deep discharge.

1. Challenge 1: Counter Testing and Ammeter Calibration Need Two Devices, Cumbersome Wiring and Low Efficiency

   Problem Description: Traditional arrester counter verification requires separate impulse current generator for counter testing and DC standard source for leakage ammeter calibration. Two devices are cumbersome to transport, and repeated test lead disconnection for circuit switching reduces work efficiency while increasing high-voltage miscontact risk from multiple wiring operations.

   Solution: The device adopts 2-in-1 integrated design. Both counter testing and ammeter calibration share the same set of output terminals, automatically switching internal circuits through menu selection without rewiring. One instrument replaces two traditional devices, weighing only 3kg for easy portability. Complete all verification items with a single on-site connection, significantly reducing test time, minimizing wiring operations, lowering safety risks, and dramatically improving work efficiency for annual arrester verification.

2. Challenge 2: Wide Sensitivity Variation Among Counter Models, Fixed Voltage Not Universal

   Problem Description: Numerous arrester counter models exist in power systems. JS, JS-8, JS-8A types and various manufacturer online monitors have different operational sensitivities — some trigger at low voltage while others require higher voltage for reliable activation. Fixed-voltage testers may fail to trigger low-sensitivity counters, or potentially damage internal components with excessive impulse energy on high-sensitivity units.

   Solution: The instrument features six adjustable output voltage levels ranging from 1000V to 2000V, covering the trigger voltage range of all mainstream arrester counter types. Testing can begin at lower levels, increasing voltage stepwise if the counter fails to activate, until finding the appropriate level ensuring reliable triggering without overshoot. This guarantees testing effectiveness while avoiding cumulative damage to internal counter components such as capacitors and electromagnetic coils from excessive energy, extending the service life of tested equipment.

3. Challenge 3: No Standard Ammeter On-Site, Leakage Current Calibration Accuracy Uncertain

   Problem Description: Milliamp meters on arrester online monitors require periodic calibration, but suitable standard current sources and ammeters are often unavailable in the field. Inspectors can only roughly check zero return, unable to perform full-range error calibration. This leads to significant deviation in monitor leakage current readings, making it difficult for maintenance personnel to accurately judge actual arrester operating status and creating hidden safety hazards.

   Solution: The instrument features a built-in 0.5-class high-precision digital ammeter used directly as the calibration standard source. Output current from 0 to 30mA is infinitely and continuously adjustable, allowing selection of multiple calibration points across the full range of the calibrated meter. Point-by-point comparison of standard values versus displayed values precisely calculates errors at each point, accurately evaluating accuracy class of the calibrated meter. No additional standard meter or current source needed — one instrument handles complete ammeter calibration with accurate and reliable results, providing credible monitoring data foundation for arrester condition assessment.

4. Challenge 4: Remote Substation Locations, Power Access Difficulties Delay Testing

   Problem Description: Many mountain substations and outdoor pole-mounted arresters are far from equipment rooms with no convenient AC power outlets. Traditional testers relying on mains power require long temporary power cords, inconvenient and hazardous, sometimes preventing testing work entirely due to unavailable power, hindering scheduled pre-thunderstorm season special verification progress.

   Solution: The device features built-in high-capacity rechargeable lithium battery, completing extensive testing independently after full charge, completely free from power cord constraints. Low power consumption and strong endurance allow verification of all arrester counters at a medium-sized substation on one charge. A dedicated power adapter is included for simultaneous charging and operation where power is available. Lithium battery portability makes it ideal for outdoor inspection and remote station testing, no longer limited by power conditions, ensuring annual verification plans complete on schedule.

5. Challenge 5: Manual Sequential Triggering is Cumbersome and Error-Prone

   Problem Description: Regulations require ten consecutive counter tests with reliable operation each time. Traditional manual triggering requires operators to press a button for each impulse, repeating ten times — cumbersome with uneven intervals, low testing efficiency, and heavy workload for large-batch counter verification. Human errors such as missed counts or duplicate counting easily occur.

   Solution: The instrument supports automatic continuous trigger mode. Preset trigger count (1 to 100 times) and trigger interval (2 to 10 seconds), then the instrument automatically outputs impulse current according to set parameters after startup, no manual sequential operation required. Uniform and stable testing process fully complies with regulatory requirements for ten consecutive tests. Operators simply observe counter operation, reducing workload and avoiding human error. Especially suitable for batch counter verification work, significantly improving testing efficiency and result consistency.

1. Substation Arrester Annual Preventive Testing

   According to power equipment preventive testing regulations, substation arresters require annual discharge counter operation verification and leakage ammeter calibration before thunderstorm season. The device handles both tests with one instrument. Conducted alongside outage maintenance plans, verify each station arrester counter for reliable operation and ammeter accuracy, promptly detecting jamming, failure, and out-of-tolerance defects. Ensures arrester online monitoring devices remain in good condition for safe thunderstorm season operation.

2.  New Construction Arrester Handover Acceptance

   Before commissioning new substations and transmission line projects, handover acceptance testing must be performed on newly installed arresters and配套 counters. Use device to test discharge counter operation on each arrester, checking for shipping and installation damage while verifying accurate counting. Simultaneously calibrate online monitor leakage ammeters to ensure correct initial readings at commissioning, establishing complete baseline data for equipment put into service.

3.  Transmission Line Pole Arrester Inspection

   Line-type surge arresters installed on overhead transmission lines are numerous and widely distributed, mostly on field towers with poor power access conditions. The device lithium battery portable design is ideal for line inspection work. Maintenance personnel carry it for pole climbing operations, completing counter testing without external power. Regular inspection ensures line arrester counters function properly, accurately recording line lightning strike data for line lightning protection analysis and fault location support.

4.  Power Plant Arrester Periodic Verification

   Arresters in power plant step-up stations and auxiliary power systems also require periodic verification. Generator outlet arresters, main transformer low-side arresters, busbar arresters and other voltage classes are equipped with various counter models. The six-level adjustable voltage device flexibly adapts to all types. Conduct verification during unit maintenance windows to ensure power plant arrester monitoring devices are intact, safeguarding safe and stable power generation equipment operation.

5. Power Testing Service Company Inspection Services

   Third-party power testing companies and inspection agencies providing arrester preventive testing services will find device an ideal standardized equipment configuration. The 2-in-1 function reduces equipment inventory, lightweight body lowers transportation burden, testing methods comply with regulatory standards, and results are standardized and credible. Widely applicable to arrester testing services for distribution networks, industrial enterprises, new energy power stations and various other customers, enhancing professionalism and efficiency of inspection services.

The device surge arrester discharge counter tester, with 2-in-1 integrated design, standard impulse current output, 0.5-class high-precision calibration, and lithium battery portability as its core advantages, solves industry pain points of scattered functionality, complicated wiring, and power access difficulties in traditional arrester counter verification equipment. The 3kg lightweight body with 3.5-inch LCD screen offers simple and intuitive operation, serving as an efficient professional tool for power maintenance personnel conducting annual arrester verification.

Our focuses on power testing instrument R&D and manufacturing, continuously optimizing products closely aligned with actual field requirements. The launch of device further completes the arrester testing product line, widely serving grid companies, power generation enterprises, power construction units, testing agencies, and industrial users. It helps improve arrester equipment operation and maintenance management, safeguarding power system lightning protection safety.