benlong 
MCB automatic magnetic trip test + on-off & high voltage test machine
Benlong 2-in-1 MCB testing machine integrates magnetic trip test, on-off verification, and high voltage dielectric test (up to 4,000V) into one compact PLC-controlled station. Reduces floor space by 40%, capital cost by 30%, with cycle time ≤2.5s/pole. IEC 60898-1 compliant. Ideal for high-volume MCB production lines.
MCB Automatic Magnetic Trip Test + On-Off & High Voltage Test Machine
Integrated MCB testing machine uses a 1-piece frame that has all 3 ways of testing the MCB’s; magnetic trip (instantaneous), mechanical on-off verification, and high voltage dielectric testing; to accomplish all three functions in one self-contained automated test station. The testing, which is used in high volume production lines and has dramatically reduced both floor space (by 40%) and capital expenditure (by 30%) over conventional separate bench systems, will also have a cycle time of less than 2.5 seconds per pole.
Our automated system is the most advanced and sophisticated in the industry. This machine provides instantaneous and precise tripping verification (5-10 times rated currents for B, C & D curves), rigorous dielectric strength testing (to 4,000V AC), continuity checks, etc. Furthermore, a high-speed indexing system will provide no impact to the total line capacity; it utilizes advanced PLC control and high-precision sensors to ensure compliance to the IEC 60898-1 safety standard and optimised production flow. This machine is a true two-in-one solution for all manufacturers of electrical assemblies to achieve the highest level of cost efficiency versus uncompromising quality; eliminates bottlenecks; maximises return on investment (ROI) for high-volume electrical assembly lines.
Standard delivery: 30-45 days | ROI typically 6-12 months | Turnkey integration
What is an MCB Magnetic Trip & High Voltage Test Machine?
A high voltage test equipment for testing the magnetic trip of circuit breakers and their mechanical reliability when switched on and off. An MCB magnetic testing machine is the main piece of equipment in every production line that manufactures miniature circuit breakers (MCBs). The test equipment ensures compliance with IEC 60899 standards before leaving the production facility.
Applies 5-10× rated current to verify instantaneous trip time (<100ms) for B/C/D curves.
Checks mechanical switching function and contact continuity after electrical tests.
Applies up to 4,000V AC dielectric test between live parts and housing.
Central control with pass/fail sorting and full traceability per unit.
Machine Features & Testing Process
Technical Specifications
| Test types | Magnetic trip (instantaneous), on-off mechanical, high voltage (dielectric) |
|---|---|
| Magnetic trip current range | 5×, 7.5×, 10× rated current (programmable for B/C/D curves) |
| Magnetic trip timing accuracy | ±1ms (milliseconds) |
| High voltage test output | Up to 4,000V AC, adjustable duration 1-99 seconds (default: 1s) |
| On-off test cycle | Automatic closing/opening verification with contact resistance check (<0.5mΩ) |
| Test cycle time (1P MCB) | ≤2.5 seconds per pole | 2P/3P/4P: 3-5 seconds total |
| Compatible MCB types | 1P, 2P, 3P, 4P | Rated current 6A-125A | B/C/D curves |
| Control system | PLC (Siemens or Mitsubishi) with HMI touch screen, recipe management |
| Data output | CSV / MES / ERP via OPC UA or Modbus TCP | QR/barcode integration |
| Power & air supply | 380V ±10% 50Hz | Compressed air 0.5-0.7MPa |
Key Advantages of the 2-in-1 Integrated Design
Reduced floor space
Combines two separate test stations into one compact unit, saving up to 40% factory floor area.
Lower capital investment
One machine replaces two traditional test benches, reducing equipment cost by approximately 30%.
No production bottleneck
High-speed indexing system ensures integrated testing does not slow down your assembly line.
Simplified maintenance
Single control system, one set of spare parts, and unified training for operators.
Trusted by industry leaders
Customer Success Story
One of the biggest Indian MCB manufacturers incorporated a 2-in-1 MCB testing machine into their current assembly line, and after having been in operation for 6 months:
The line achieved full IEC 60898-1 compliance with complete traceability per breaker.
Applications and Production Integration
Standard Delivery and Commissioning
Request a Custom MCB Testing Machine Quote
Please provide your MCB specifications, target testing cycle time, and the amount of units needed for production. Our engineering team will provide a solution specifically designed for you along with a return on investment analysis.
WhatsApp: +86 150 5837 0007 | Email: xsb@benlongkj.cn | English & Chinese support
Why Choose Benlong for MCB Testing Equipment?
- 15+ years designing MCB testing and assembly lines
- Proven 2-in-1 integrated test station technology
- Fully compliant with IEC 60898-1 / IEC 60947-2
- PLC-based control with remote diagnostic support
- Global installations: Europe, Southeast Asia, Americas, Middle East
Standard Machine Includes
The mobile module for testing magnetic trip units (B/C/D curves) consists of the following equipment: an on-off mechanical verification unit, a high voltage tester (4kV AC), a PLC with an HMI (Siemens/Mitsubishi), automatic pass/fail sorting, a data logging software package and a safety enclosure with an interlock.
Related solutions
Frequently Asked Questions
Three tests are performed by the device: magnetic trip (instantaneous) test at 5-10 times the rated current; on-off mechanical verification; and high voltage (dielectric) test up to 4000v ac.
≤2.5 seconds for each pole. For 2P/3P/4P MCB’s total cycle time will increase in a linear fashion (typically 3 – 5 seconds total).
Absolutely. All the test curves ( B, C and D ) are saved in the machine. Changing from one curve type to another takes less than a minute using the HMI.
The device is meant to be installed between upstream/downstream conveyor systems; Any needed communication will utilize either Modbus TCP or OPC UA protocols.
Magnetic Trip Time (ms), On/Off Status, Hi-Pot Leakage Current (mA), Pass/Fail, Date & Time (Timestamp), Serial Number are recorded for every MCB that is tested.
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