benlong 
Línea de prueba automática de MCB
High‑speed MCB automatic testing line (1,800‑2,400 pcs/h) with multi‑station parallel testing, vision inspection, automatic sorting, and full data traceability. Solves testing bottlenecks, cuts field failures by 70%, and provides IEC/UL audit‑ready reports. Quick changeover (<30 min). MES ready.
Ultra‑High Speed MCB Automated Testing & Sorting Line
Customer pain points: Because manual testing is very slow in high-volume production, operators may miss defects due to lack of proper test data traceability/analysis. Changeover time to different MCB types can take hours, resulting in expensive downtime. The MCB automatic testing line addresses these issues with millisecond sorting, multi-station parallel testing, and full data traceability to allow manufacturers to achieve 100% IEC/UL compliance and reduce rework by more than 80%.
Use of high-speed indexing tables and robotic loading/unloading provides non-stop operation. At the same time, tests (trip time (B/C/D curves), thermal magnetic calibration, and contact resistance) can be done, critical tolerances can be verified using high-resolution vision, and an ultra-stable sorting mechanism will separate Pass, Fail, and Rework products. The data acquisition system (DAS) logs all tests variables to maintain complete traceability. The transition times between different pole (1P-4P) and current ratings are measured in minutes rather than hours. The average production of the machine(s) reaches 1,800-2,400 units/hour.
Standard delivery: 60-90 days | Quick changeover <30 min | MES‑ready DAS
What Problems Does an MCB Automatic Testing Line Solve?
MCB manual testing creates 3 significant problems: inconsistent quality (human error causes trip time to vary), limited production volume (60-80 units tested/hour – 1000s tested/hour for automation), and no traceability (paper log cannot be audited). The MCB automated testing line removes all 3 of these barriers. The line automates the loading, testing, sorting and logging of data. For MCB manufacturers, this means: increased OEE; reduced cost of rework, and auditable data for IEC/UL certification. The automated testing lines also resolve the issues of switching between testing
methods (1P/2P/3P/4P) or changing current ratings with a changeover time of less than 30 minutes once programmed into HMI (according to recipe).
The use of multi-station parallel testing (instantaneous trip, thermal calibration and contact resistance) allows the testing of one unit to reduce testing times from 60 sec/manual to less than 3 sec/unit.
All tests results (trip time, calibration value, pass/fail) will be stamped with time and serial no. Ensures ISO 9001; IEC audit compliance.
Switching between different MCB types can take less than 30 minutes via recipe-based parameter switching, whereas manual recalibration can take hours.
Manually sampling does not catch all defects; however, by inspecting all items, many defects that would otherwise be missed will be captured. As a result, field failure rates may be reduced as much as 70%.
Test Stations & Customer Benefits
Technical Specifications – What the Line Delivers
| Throughput (units/hour) | 1,800 – 2,400 (depending on pole count) |
|---|---|
| Test coverage | Instantaneous trip (B/C/D curves), thermal calibration (1.13×/1.45× In), contact resistance (µΩ), vision inspection (casing, label, screws) |
| Precisión actual | ±0.5% of reading |
| Precisión de sincronización | ±1ms for instantaneous; ±0.1% for thermal |
| Tiempo de cambio | <30 minutes (recipe‑based, no tooling change for most parameters) |
| Salida de datos | CSV, SQL, MES via OPC UA or Modbus TCP |
| Compatible MCBs | 1P, 2P, 3P, 4P; 6A‑125A; B/C/D curves |
| Sistema de control | PLC (Siemens) + industrial PC, HMI touch screen |
| Fuente de alimentación | 380V ±10% 50Hz | Compressed air 0.6MPa |
| Safety features | Enclosed test area, emergency stop, light curtains, interlock doors |
Core Customer Benefits – Why Manufacturers Choose This Line
Benefit 1: 25× higher throughput
Manual Testers are able to do 60-80 units per hour. Using this line a tester can handle 1,800-2400 units per hour. This results in a 25-30x increase in productivity to meet maximum demand without needing to add shifts or employ additional test personnel and typically achieve a return on investment (ROI) in less than nine months.
Benefit 2: Zero operator‑induced variation
Testers exhibit variability in their results due to factors such as time of day, fatigue, etc. In contrast, the automated process achieves much higher precision (±1 ms) than human testers as a result of utilizing high precision sensors on the test line (±0.5%), thus avoiding false passes and false failures.
Benefit 3: Complete audit‑ready traceability
The trip time, calibration values, contact resistance and visible results of every unit have been recorded with a date/time stamp and serial number. Export to a paperless report for IEC/UL audits, instead of searching through paper logs for your information.
Benefit 4: Fast changeover for mixed production
Change from single-phase, 10-amp, B type circuit breaker to three-phase, 63-amp, C type circuit breaker in under thirty (30) minutes. HMI loads new recipes; automatically adjusts test currents and time windows. No changes to mechanical components needed for most parameters.
Customer Success – How One Manufacturer Cut Field Returns by 72%
After implementing our automatic testing line for MCBs, a Chinese MCB producer that previously had a 1.2% field failure rate because of a missed calibration drift through traditional (10% sample) testing now has a corrected field failure rate of zero!!!
The customer received value from the line within 11 months, evidenced by the customer passing a major distributor’s audit, with no non-conformities.
Applications – Where This Line Adds Most Value
Ingeniería y entrega a medida
Request a Custom MCB Testing Line Quote
Submit your MCB specifications, projections for throughput and test criteria. An engineering group will create a design that eliminates your testing bottleneck (with a complete return on investment analysis).
WhatsApp: +86 150 5837 0007 | Correo electrónico: xsb@benlongkj.cn | Soporte en inglés y chino
Why Benlong for MCB Testing Automation?
- Más de 15 años diseñando high‑speed test and sorting lines for circuit breakers
- Proven multi‑station parallel testing – 1,800‑2,400 units/hour
- Full MES integration – OPC UA, Modbus TCP, SQL direct
- Quick changeover recipe system – <30 minutes
- Soporte técnico y de repuestos a nivel mundial
La línea estándar incluye
Features of systems include: High speed indexing table; robotic loading & unloading; multi-station test module (trip curve, calibration, contact resistance, vision); automatic sorting of products (pass, fail, rework); data acquisition System (DAS); PLC with HMI (Siemens); safety guarding; installation and training; 1-year warranty.
Preguntas frecuentes
Only 5% – 10% of products are manually inspected, meaning up to 90% remain untested. With this system, 100% of products are tested with ±0.5% current accuracy and ±1ms timing, thus eliminating the risk of sending defective breakers. Field failure rates drop by 70% – 80% after installation.
Certainly! The assembly line is modular and an add on to your actual assembly line. You can send units to the new line from your conveyor and once they have been tested/sorted they will return to your packaging area. The modules include I/O and Ethernet communication to allow complete synchronisation across the assembly and testing lines.
When testing 500,000 MCBs each month, your expected payback is typically between 8 and 14 months based on a 2-3% decrease in defective parts and the ability to replace 4-6 testers with just one tester reducing labour costs, and avoiding the need to make warranty payments on inverter warranties.
The design incorporates a multi‑station configuration consisting of a thermal calibration (1.13×/1.45× In) and an instantaneous trip (5-10× In) module. The thermal and trip tests can both be run simultaneously on separate units, which allows for maximum throughput to be achieved.
Training can be completed in two 8-hour days for operators. The HMI is easy to use; Select the recipe for the product you want to run, load the magazine, and press start. The Automated Flanging line does everything else including automatically sorting finished products and creating an electronic data log for each operator.
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