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Detailed about MCB Magnetic Release Assembly Welding Equipment
By Huang Xiaolei | Benlong Automation | Published July 27, 2026
Inside a miniature circuit breaker, the magnetic release is the part that trips the breaker under a short circuit, so the joints and sub-assemblies around it have to be both precise and repeatable. MCB magnetic release assembly automatic welding equipment brings the welding and assembly of those parts onto a single automated flow, where every unit is built the same way, in the same order. This article walks through that process step by step and shows how the individual machines link into one line.
What the MCB Magnetic Release Assembly Involves
- Welding the silver point of the static contact
- Welding the magnetic coil
- Fitting the pre-assembled magnetic iron core into the coil
- Assembling the result with the cage terminal
The magnetic release is not a single part but a small stack of welded and assembled sub-components. Automating it as one sequence keeps each step under machine control instead of relying on manual handling between separate benches.
The Automated Welding and Assembly Process, Step by Step
- First, weld the silver point of the static contact. For details, see the Silver dot + Contact automatic welding machine.
- Next, weld the magnetic coil. For details, see the MCB magnetic trip set automatic welding machine.
- Next, fit the magnetic iron core into the magnetic coil. The magnetic iron core should be fed in an already-assembled state. For details, see the MCB magnetic iron core automatic assembly machine.
- Finally, assemble the component that has completed the previous three processes with the Cage Terminal.
All parts are fed by vibratory bowl feeders, while the component that has completed the first three processes is placed by a mechanical gripper into a custom fixture and travels between the units on a conveyor.
One Line, or Standalone Stations
Each of the aforementioned process steps is performed independently by a self-contained machine; consequently, the entire system can operate as an integrated welding line or allow individual units to function separately. This configuration enables the welding line to operate like a traditional production line, yet ensures that a malfunction or modification at one stage does not disrupt the normal operation of the other stages. Furthermore, equipment maintenance and upgrades are easily facilitated. You can see how the stations relate on our Welding / Soldering Project page.
Why Automate the Magnetic Release Assembly
- Consistency: every joint and fit made to the same standard
- Traceability: process data captured for each unit
- Less handling: parts move by gripper and conveyor rather than by hand
- Integration: welding and assembly combined as automated assembly and test systems
Combining the welding and assembly steps removes the transfers, re-fixturing and manual checks that a bench-based workflow adds between stations. For an MCB producer, that means the magnetic release arrives at final assembly already welded, fitted and inspected as one qualified sub-assembly.
Talk to Benlong About Your Line
Benlong Automation designs MCB magnetic release assembly automatic welding equipment and the individual stations behind it, all built to your drawings for MCB, MCCB, RCCB and RCBO production. To discuss a line matched to your product, contact our engineering team.
References
- IEC 60898-1, International Electrotechnical Commission, webstore.iec.ch
- Benlong Automation, Welding / Soldering Project product range
