What does VCB stand for?

VCB stands for Vacuum Circuit Breaker, a medium-voltage circuit breaker using a vacuum interrupter to extinguish the arc. Used in power distribution, industrial plants, and railways.

IEC 62271‑100 · 12/24KV

VCB Automatic Production Line
25‑30 units/shift | 12KV/24KV

Q: What is an automated production line?

An automated production line integrates multiple machines and workstations to perform assembly and testing with minimal human intervention. Our VCB line includes vacuum interrupter alignment, mechanism characteristic testing, HV insulation testing, and mechanical endurance cycling.

Q: What is the full automatic production line?

A full automatic production line performs all processes from feeding to final testing without manual intervention. Our VCB line is fully automatic with conveyor, servo alignment, mechanism testing, HV testing, and endurance cycling.

Q: Why is VCB used in HT Line?

VCBs are used in HT lines because vacuum has excellent arc-quenching properties – no fire risk, compact size, long electrical life (>10,000 operations), and low maintenance.

Q: How is the vacuum interrupter aligned during assembly?

Servo-controlled actuators and custom jigs with micron-level precision. Sensors verify alignment before proceeding – ensuring correct contact gap and vacuum seal integrity.

Q: What mechanical characteristics are measured?

Opening speed, closing speed, total travel, over travel, opening time, closing time, and contact bounce – compared against IEC 62271-100 tolerances.

Complete automatic assembling and testing of vacuum circuit breakers. Servo-aligned vacuum interrupter assembly, mechanism characteristic tests (speed, travel and timing), high-voltage insulating testing, and mechanical endurance cycling. Made for medium voltage switchgear manufacturers.

Request a line quote → View line modules

25‑30

Units/shift

12‑24KV

Voltage rating

99.8%

First‑pass yield

100%

MES traceability

Core advantages

Why a fully automatic VCB production line?

A completely automated line provides consistency in mechanical properties and micrometer accuracy for interrupter alignments while producing medium voltage vacuum breaker products. The manufacturing line also tests every unit with 100% in-line high voltage testing in accordance with IEC 62271-100.

Precision vacuum interrupter assembly

Servo‑controlled actuators and custom jigs guarantee micron‑level alignment of the vacuum interrupter – critical for breaking capacity and vacuum integrity.

Mechanism characteristic testing

Automated measurement of opening/closing speed, travel distance, timing, and over travel – fully compliant with IEC 62271‑100.

100% in‑line HV insulation test

Withstand voltage (power frequency) and loop resistance tests performed on every VCB before leaving the line.

Full traceability & remote diagnostics

Honeywell barcode scanning links components and test results to each unit serial number. Remote diagnostics via HMI/PLC software.

Integrated line modules

Our VCB automatic production line components

A complete assembly and test line for 12KV/24KV vacuum circuit breakers.

Vacuum circuit breaker （VCB） automaticproduction line
- Production Line Project
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Full line integration available – from vacuum interrupter assembly to mechanical endurance test.

Field results

Real impact from automatic VCB lines

European switchgear manufacturer

Replaced manual assembly with our fully automatic line for 24kV VCBs. Output increased from 12 to 28 units/shift. First‑pass yield reached 99.8%.

Asian power equipment supplier

Integrated vacuum interrupter alignment and mechanism characteristic testing. Achieved 100% traceability for IEC audit. Payback period 18 months.

Middle East utility contractor

Custom line for 12kV VCBs with remote diagnostics. Reduced field service travel costs by 60% via VPN troubleshooting.

South American panel builder

Added mechanical endurance cycling station to existing line. Validated 10,000 operations per VCB automatically.

Technical specs

Traditional manual assembly vs. our fully automatic VCB line

Learn more about the main differences between medium-voltage VCB production with respect to throughput, accuracy, and compliance.

Parameter	Traditional manual/semi‑auto	Benlong fully automatic line
Output per 8H shift	10‑15 units	25‑30 units
Interrupter alignment accuracy	Operator dependent (±0.5mm)	Servo‑controlled (±0.01mm)
Mechanical characteristic test	Manual, sample‑based	100% automated, per unit
HV insulation test coverage	Sample‑based	100% in‑line
Mechanical endurance test	Manual, external lab	Automated cycling station, 10,000+ ops
Traceability level	Paper log, partial	Serialized barcode, 100% MES
Typical investment	$200k – $500k	$800k – $2.5M+

A Full Automatic VCB Assembly Line will provide return on investment (ROI) within 18 ‑ 24 months for ==volume of 1,000 or more units/year ==> how much work=brings broken down?

Design guide

How to specify a VCB automatic production line – 5 steps

Plan your vacuum circuit breaker assembly and test line for maximum efficiency and IEC compliance.

Step 1: Define voltage rating & volume

Specify your VCB voltage (12kV, 24kV, or 40.5kV) and annual output. This determines interrupter handling, test voltage levels, and line speed.

Step 2: Select vacuum interrupter type

Different interrupter sizes and contact materials require custom jigs and alignment algorithms. Provide interrupter samples for fixture design.

Step 3: Specify mechanical test parameters

Opening speed, closing speed, travel distance, over travel, timing, and contact bounce. Our line measures all against IEC 62271‑100 tolerances.

Step 4: Define HV test requirements

Power frequency withstand voltage, lightning impulse (optional), and loop resistance. Our line performs 100% in‑line testing.

Step 5: Plan MES & remote access

Barcode traceability per unit, real‑time data upload (OPC UA / Modbus), and secure VPN for remote diagnostics and software updates.

Are you looking for a fully functioning VCB manufacturing line? Let us know your requirements such as voltage limits and expected output so we can create an all-in-one fixed-price engineering option for you. Get in touch with our full-service team.

COMPANY PROFILE

Automation System Integration at the Core

Benlong Automation Technology Co., Ltd was established in 2008 in Wenzhou, China as a high-tech national enterprise that specializes in creating high-end digital intelligent manufacturing equipment. Benlong has designed and supplied cost-competitive custom solutions for more than 500 medium voltage switchgear manufacturers around the globe through its automatic production lines, automated assembly machines, and comprehensive testing solutions based on the client’s specific needs.

Designed with precision and reliability, our fully automatic VCB lines have servo-controlled vacuum interrupter assemblies, mechanisms tested based on their characteristics, high voltage insulation tests, and are connected to MES systems for power equipment manufacturers looking to transition to Industry 4.0.

National High-Tech EnterpriseVCB Assembly & Test

2008Founded

50.88MRegistered Capital RMB

160+National Patents

26Software Copyrights

300+Qualification Records

1200+Customers Served

ENGINEERING & INTEGRATION

From components to full VCB assembly & test line

Benlong creates and manufactures complete automatic VCB production lines and combines all crucial processes together. These include the alignment of vacuum interrupters, the assembly of spring mechanisms, mechanical characteristic testing, high voltage insulation testing, and mechanical endurance cycling. We provide a complete turnkey installation, PLC programming and a handshake to ensure communication with the MES system.

VCB automatic production line – 25‑30 units/shift, 12KV/24KV

Vacuum interrupter alignment station – servo‑controlled, micron precision

Mechanism characteristic test station – speed, travel, timing, over travel

HV insulation & mechanical endurance – 100% in‑line, IEC 62271‑100

Request a custom VCB line quote

FACTORY ENVIRONMENT

Built for reliable VCB production lines

We assemble, wire, and pre‑commission every automatic VCB line in our facility before shipment. Full FAT with your product samples.

GLOBAL INSTALLATIONS

Trusted by VCB manufacturers worldwide

From Europe to Asia, our automatic production lines are improving quality and throughput for medium‑voltage vacuum circuit breakers.

Algeria plant

Azerbaijan facility

Ethiopia plant

India facility

Iran factory

Russia site

Saudi Arabia line

CERTIFICATES & HONORS

Technology, Patents and Quality Recognition

Benlong has obtained national high-tech enterprise certification, multiple patents, software copyrights and industry honors, reflecting continuous investment in technology development and intelligent manufacturing innovation.

ISO9001 Certificate

ISO14001 Certificate

ISO9001 Certificate

ISO 45001 Certificate

TUV Certificate

Questions?

VCB Automate Line – Question and Answer

What is an automated production line?

An automated production line is a set of connected machines and workstations that operate using minimal human intervention to perform assembly and test operations via a material-handling system. Our automatic VCB production line features a central PLC controlling: alignment of vacuum interrupters, assembly of mechanisms, testing mechanical characteristics, testing for high voltage insulation, and mechanical performance testing cycling for endurance.

What is VCB?

VCB refers to a medium-voltage circuit breaker (typically 12 kV, 24 kV, or 40.5 kV) that uses a vacuum interrupter to extinguish the electrical arc created when the breaker opens. Due to their reliability, durability, long operational life, and minimal maintenance requirements, VCBs are commonly used in power distribution, industrial facilities, rail transportation, and renewable energy systems.

What is the full automatic production line?

A full auto production line means all processes from feeding components into the line to testing the finished product occur without human intervention. Our VCB line includes vacuum interrupter loading, servo-controlled alignment, spring mechanism assembly, mechanism characteristic test (speed/travel/timing), high-voltage withstand test, loop resistance test, mechanical endurance cycling, and MES data upload – all on one continuous conveyor. The operator only monitors the system and loads component magazines.

Why is VCB used in HT Line?

The benefits of using VCBs in high-tension (HT) lines include their quick extinguishing of arcing when breaking the circuit with vacuum in between the breaker contacts. There is no possibility of fire or explosion, as vacuum has excellent arc-quenching properties. Their compact size, long lifespan (over 10,000 cycles), low maintenance, and ability to handle frequent switching make them an ideal choice for high-voltage applications. Our automatic line ensures every VCB meets IEC 62271-100 arc-quenching and dielectric strength requirements.

How is the vacuum interrupter aligned during assembly?

To accurately assemble a VCB, our production line uses servo-controlled linear motion actuators and specialized jigs designed to measure the alignment of vacuum interrupter assemblies within one micron of tolerance. Alignment checks are performed using electronic sensors, which verify the correct contact gap and vacuum seal integrity. Both factors are critical for the VCB’s short-circuit interruption performance.

What mechanical characteristics are measured?

During assembly, each VCB is tested at a stationary automated test station. Measurements include opening and closing speeds, total travel distance, over-travel distance, opening and closing times, and contact bounce. All results are compared against IEC 62271-100 tolerances, and each VCB’s test results are linked to its serial number for full traceability.

Start Your Project

Need a Turnkey VCB Automatic Production Line?

Tell us your voltage rating (12kV/24kV/40.5kV), target throughput, and assembly requirements. Our engineers will design a custom inline system with vacuum interrupter alignment, mechanism characteristic testing, and full MES integration.

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