The VS1-12 vacuum circuit breaker（VCB assembly line ） assembly line is a complete set of equipment for batch production of indoor high-voltage vacuum circuit breakers. Assembly, inspection and conveying are integrated on one roller conveyor line, designed for VS1 (ZN63A) series 12 kV vacuum circuit breakers in switchgear workshops.
Line configuration
The line is built on a heavy-duty roller conveyor. Depending on the workshop layout, straight sections are combined with turning sections into an L-shaped or U-shaped line; dedicated turning conveying mechanisms keep workpieces moving continuously while operators work at fixed stations. Assembly stations are equipped with rotating fixtures for flipping and angular positioning of the breaker body during installation of insulating poles, contact arms and other parts. Heavy loading and unloading are assisted by electric hoists or power-assisted manipulators.
Process coverage
On the VS1-12 vacuum circuit breaker assembly line, workstations are arranged by takt and divided into an assembly section and a testing section. Typical operations include: frame loading, spring operating mechanism and closing/tripping assembly, main circuit assembly, secondary wiring, mechanical run-in, mechanical characteristic testing, power-frequency withstand voltage test, contact resistance measurement, chassis truck and contact arm mounting, cover panel assembly and final inspection. Run-in is performed in a sound-proof booth to control workshop noise.
Inspection items
Mechanical characteristic testing covers closing/opening speed, travel, operating time and three-phase simultaneity. Withstand voltage testing is configured to the common requirement of 42 kV/1 min for the main circuit and 2 kV/1 min for the secondary circuit, subject to the customer’s test specification. Test data can be stored and traced by barcode, with an optional MES interface.
Mixed-model production
The vacuum circuit breaker production line supports mixed production of multiple VS1 frame sizes, such as 630A-25kA and 1250A-31.5kA, with one-touch recipe changeover to reduce changeover time. Production takt, number of stations and line length are customized according to customer capacity and workshop size; typical output is 30–50 units per 8-hour shift, depending on breaker type.
The line is controlled by a centralized PLC system. Air and power outlets are arranged at station level in modular form for convenient access by test tools. Vacuum circuit breaker production lines are non-standard custom-built equipment; the above is a typical configuration, and the final scope is defined by the process design and drawings.
Customizable Parameters
| Parameter | Typical / Reference Value | Options |
|---|---|---|
| Product scope | VS1 (ZN63A) series indoor HV vacuum circuit breakers, 12 kV; frames such as 630A-25kA and 1250A-31.5kA | Other frame sizes and voltage ratings on request |
| Line layout | Straight sections combined with turning sections; L-shaped or U-shaped | Follows workshop footprint |
| Conveying system | Heavy-duty roller conveyor | Roller or belt; length per layout |
| Station layout | Assembly section + testing section; station count defined by process design (reference installations: approx. 16 assembly stations + 3 testing stations) | Per process design |
| Output / takt | 30–50 units per 8-hour shift | Per customer capacity target |
| Assembly mode | Manual-assisted assembly with rotating fixtures; semi-automatic or automatic options | Optional |
| Lifting & handling | Electric hoists / power-assisted manipulators at heavy stations | By workpiece weight |
| Mechanical run-in | Sound-proof booth | Included / optional |
| Mechanical characteristic test | Closing/opening speed, travel, operating time, three-phase simultaneity | Per test specification |
| Withstand voltage test | Main circuit 42 kV/1 min; secondary circuit 2 kV/1 min (typical) | Per customer test specification |
| Contact resistance measurement | In-line station | Optional |
| Data traceability | Barcode tracing; MES interface optional | Optional |
| Control system | Centralized PLC with HMI | PLC brand per customer requirement |
| Power supply | 380 V ±10%, 50 Hz (typical) | Per site standard |
| Station utilities | Modular air and power outlets at each station | — |
| Fixtures & tooling | Custom-machined per breaker model | Per product |
| HMI language | Chinese / English | Other languages on request |
| Alarm & monitoring | Fault alarm, pressure monitoring | Optional |