I. Overview
The ZN63 (0S1) -12 indoor solid sealed pole Vacuum circuit breaker is suitable for three-phase AC power systems with a rated voltage of 12kV and a frequency of 50Hz. It can be widely used in power plants, substations, petrochemical, metallurgical, manufacturing industries, airports, and residential areas as a control and protection device for electrical facilities. It is particularly suitable for places with frequent operation or multiple short circuit current interruptions under rated current, and can be installed in indoor air insulated switchgear (such as KYN28 and KYN96) for supporting use. The circuit breaker complies with the requirements of GB 1984 "High Voltage AC Circuit Breakers", JB/T3855 "High Voltage AC Vacuum Circuit Breakers", DL/T 403 "Technical Conditions for Ordering 12kV~40.5kV High Voltage Vacuum Circuit Breakers", and relevant requirements of IEC 62271-100 and other standards.
II. Environmental conditions for use
1. Environmental temperature: upper limit+40 ℃, lower limit -15 ℃ (storage and transportation allowed at -30 ℃);
2. Altitude: not exceeding 2000m;
3. Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
4. Saturated vapor pressure: The daily average value shall not exceed 2.2 × 10Mpa, and the monthly average value shall not exceed 1.8 × 10Mpa;
5. The seismic intensity shall not exceed 8 degrees;
6. No places with fire, explosion, serious pollution, chemical corrosion, or severe vibration.
| Model | Size |
| ZN63(VS1)-12 | 820*730*780mm |
ZN63 (VS1)-12 Indoor Solid Sealed Pole Vacuum circuit breaker for Reliable Medium Voltage Power Distribution
At Jihui Electric Group Co., Ltd., we specialize in designing and manufacturing reliable medium and low voltage power transmission and distribution equipment up to 35kV. As a professional Vacuum Circuit Breaker Manufacturer in China, we focus on providing safe, stable, and efficient electrical solutions for power utilities, industrial projects, renewable energy systems, infrastructure construction, and commercial facilities.
Our ZN63 (VS1)-12 indoor solid sealed pole vacuum circuit breaker is one of our key medium voltage switching products. Designed for 12kV indoor power distribution systems, this vacuum circuit breaker combines advanced vacuum interruption technology with solid sealed pole insulation technology. It provides excellent electrical performance, strong mechanical stability, and long service life for demanding operating environments.
Over years of experience in the power equipment industry, we have continued improving our product design, production process, and quality control system. Every ZN63 (VS1)-12 vacuum circuit breaker leaving our factory is tested carefully before delivery to ensure reliable operation and compliance with customer project requirements.
The ZN63 (VS1)-12 indoor solid sealed pole vacuum circuit breaker is a medium voltage circuit protection device mainly used for controlling and protecting electrical equipment in AC power systems. It is suitable for rated voltages up to 12kV and is widely applied in indoor switchgear systems, substations, industrial power distribution rooms, and renewable energy projects.
Compared with traditional circuit breakers, our solid sealed pole vacuum breaker integrates the vacuum interrupter, conductive components, and insulation parts into a compact sealed structure. This design reduces the influence of dust, moisture, and external environmental factors, helping the breaker maintain stable performance during long-term operation.
The main purpose of this equipment is simple: when the power system operates normally, it allows current transmission safely; when electrical faults such as short circuits or overloads occur, it quickly interrupts the current to protect transformers, cables, motors, and other important electrical equipment.
Our customers choose the ZN63 (VS1)-12 series because it offers a practical balance between safety, reliability, maintenance cost, and installation convenience.
Understanding how a vacuum circuit breaker works helps users understand why it is widely used in modern medium voltage systems.
Inside our ZN63 (VS1)-12 vacuum circuit breaker, the key component is the vacuum interrupter. When the breaker receives an opening command, the contacts inside the vacuum chamber separate. Because the vacuum environment contains almost no gas molecules, the electrical arc generated during contact separation is quickly extinguished.
The operating mechanism then completes the switching action through a mechanical transmission system. When closing, the contacts connect firmly to allow current flow. When opening, the contacts separate rapidly to stop abnormal current and protect the electrical network.
Normal operation: Current flows through the closed contacts with low electrical loss.
Fault condition: The protection system sends a trip signal to open the breaker.
Arc extinction: The vacuum interrupter quickly removes the arc.
System protection: Damaged equipment and safety risks are reduced.
Because vacuum technology does not require oil or gas insulation media, our vacuum circuit breaker provides cleaner operation and lower maintenance requirements compared with many traditional switching solutions.
One of the biggest advantages of our ZN63 (VS1)-12 vacuum circuit breaker is the solid sealed pole structure. The vacuum interrupter and conductive parts are sealed together using advanced insulation materials.
This structure improves insulation reliability and reduces the risk caused by external conditions such as humidity, dust, and pollution. For customers operating equipment in industrial areas or complex environments, this design provides additional confidence.
Space efficiency is becoming increasingly important in modern power distribution projects. Our 12kV indoor vacuum circuit breaker adopts a compact mechanical structure, making it easier to install inside switchgear cabinets.
The compact design helps customers save installation space while maintaining excellent electrical performance. It is especially suitable for urban substations, industrial plants, commercial buildings, and infrastructure projects where space is limited.
The ZN63 (VS1)-12 series is designed for repeated switching operations. The vacuum interruption system reduces contact wear and improves operational durability.
Through optimized mechanical design and strict production control, our breakers can achieve stable performance during long-term service. This helps customers reduce unexpected downtime and maintenance expenses.
Safety and environmental protection are important factors in modern electrical equipment. Our vacuum circuit breakers do not use insulating oil, which avoids risks related to oil leakage and fire hazards.
The clean vacuum interruption technology supports safer operation and meets the growing demand for environmentally responsible power equipment.
At Jihui Electric, we do not only manufacture products; we develop complete power distribution solutions. Our engineers focus on improving electrical safety, operating stability, and customer installation experience.
The following table shows the general performance comparison between a modern vacuum circuit breaker and traditional oil circuit breaker technology.
| Item | ZN63 (VS1)-12 Vacuum Circuit Breaker | Traditional Oil Circuit Breaker |
|---|---|---|
| Interruption Medium | Vacuum | Insulating Oil |
| Maintenance Requirement | Low maintenance design | Requires regular oil inspection |
| Environmental Impact | No oil pollution risk | Potential oil leakage concern |
| Application Voltage Range | Medium voltage systems up to 12kV | Medium voltage applications |
Source: Technical comparison based on IEC 62271-100 high-voltage switchgear and controlgear standards and publicly available industry technical information.
A vacuum circuit breaker must respond quickly during electrical faults. Our ZN63 (VS1)-12 series provides fast interruption performance, helping protect power equipment from damage caused by abnormal current.
The high-speed operating mechanism ensures accurate opening and closing actions, improving the overall reliability of the electrical distribution system.
During product development, we pay close attention to mechanical structure quality. The operating mechanism, insulation components, and connection parts are designed to withstand repeated operation and transportation conditions.
This strong mechanical structure makes our medium voltage vacuum circuit breaker suitable for long-term industrial applications where equipment reliability is critical.
| Feature | Vacuum Circuit Breaker | SF6 Circuit Breaker | Oil Circuit Breaker |
|---|---|---|---|
| Arc Extinguishing Method | Vacuum interruption | SF6 gas insulation | Oil interruption |
| Maintenance Frequency | Low | Medium | Higher |
| Environmental Consideration | Environment-friendly operation | Requires gas management | Requires oil management |
| Typical Application | Indoor medium voltage distribution | Medium and high voltage systems | Traditional power systems |
Source: Information summarized from IEC 62271 series standards and common electrical equipment industry practices.
For Medium Voltage Electrical Equipment, insulation reliability directly affects system safety. Traditional designs may be affected by environmental conditions over time, but solid sealed pole technology provides a stronger protective structure.
In our ZN63 (VS1)-12 indoor solid sealed pole vacuum circuit breaker, the insulation system is designed as a complete sealed unit. This reduces the possibility of insulation aging caused by external contamination and improves product consistency during operation.
For power companies, engineering contractors, and industrial users, this means fewer maintenance problems, safer operation, and better investment value throughout the equipment life cycle.
At Jihui Electric Group, we design our electrical equipment according to real application needs. The ZN63 (VS1)-12 indoor solid sealed pole vacuum circuit breaker is widely used in different industries where safe and stable medium voltage power distribution is required.
From power utilities to industrial factories, our customers rely on our vacuum circuit breaker solutions to protect electrical systems, improve operation safety, and reduce unexpected shutdown risks. With reliable switching performance and compact design, the ZN63 (VS1)-12 series is suitable for various indoor power distribution environments.
Power companies require electrical equipment that can operate continuously and safely under demanding conditions. Our 12kV indoor vacuum circuit breaker is commonly installed in substations, distribution networks, and switching stations to control and protect medium voltage circuits.
The fast fault interruption capability helps minimize damage during abnormal conditions and improves the overall stability of the power supply network.
With the rapid development of solar power, wind energy, and other renewable energy projects, reliable medium voltage protection equipment has become increasingly important.
Our ZN63 (VS1)-12 vacuum circuit breaker can be integrated into renewable energy distribution systems to manage power transmission between generation equipment, transformers, and grid connection points.
Industrial plants often operate heavy electrical loads, including motors, production equipment, and automated systems. Any electrical failure can lead to production interruption and economic losses.
Our medium voltage vacuum circuit breaker provides dependable protection for industrial power systems, helping factories maintain stable operation and improve equipment safety.
Rail transit systems, commercial buildings, and urban infrastructure projects require reliable electrical distribution solutions. The compact structure of our solid sealed pole vacuum breaker makes it suitable for indoor switchgear applications where space and reliability are important.
Mining and petrochemical facilities often operate in challenging environments with strict safety requirements. Our vacuum circuit breaker provides reliable switching performance and helps protect important electrical equipment used in these industries.
At Jihui Electric, we believe product quality starts from every small manufacturing step. Our production process combines modern equipment, experienced engineers, and strict inspection procedures to ensure every vacuum circuit breaker meets customer expectations.
Before production begins, our engineering team evaluates product structure, electrical performance, mechanical strength, and customer requirements. We continuously improve our designs based on industry experience and application feedback.
The ZN63 (VS1)-12 series is developed with attention to insulation reliability, operating stability, and convenient maintenance.
Material quality directly affects electrical equipment reliability. We carefully select insulation materials, conductive components, metal structures, and mechanical parts according to technical requirements.
The solid sealed pole uses high-performance insulation materials to provide excellent electrical insulation and mechanical protection.
During assembly, our technicians follow standardized production procedures. Each component is installed with accurate positioning to ensure proper mechanical movement and electrical connection.
The operating mechanism is carefully adjusted to achieve smooth opening and closing actions, helping the breaker maintain stable performance during repeated operations.
Before delivery, every ZN63 (VS1)-12 indoor vacuum circuit breaker undergoes strict inspection and testing. Our quality team checks electrical performance, insulation characteristics, mechanical operation, and product appearance.
| Inspection Item | Purpose | Quality Control Method |
|---|---|---|
| Insulation Test | Verify insulation reliability | High voltage withstand testing |
| Mechanical Operation Test | Check opening and closing performance | Repeated operation inspection |
| Electrical Performance Test | Confirm switching capability | Factory performance testing |
| Appearance Inspection | Ensure manufacturing quality | Visual and dimensional inspection |
Source: Quality inspection items are based on IEC 62271-100 requirements and Jihui Electric internal production inspection procedures.
Choosing the right electrical equipment supplier is not only about product price. Long-term reliability, technical support, production capability, and after-sales service are equally important.
At Jihui Electric Group Co., Ltd., we combine manufacturing experience with professional engineering support to provide complete medium voltage power solutions.
We specialize in research, development, manufacturing, sales, and service of medium and low voltage power transmission and distribution equipment up to 35kV.
Our product range includes Cable accessories, Cable distribution boxes, ring main units, Prefabricated Substations, combination transformers, SF6 load switches, and vacuum circuit breakers.
Quality management is an important part of our daily production. Our company has obtained:
ISO9001 Quality Management System Certification
ISO14001 Environmental Management System Certification
ISO45001 Occupational Health and Safety Management System Certification
These certifications reflect our commitment to stable manufacturing processes, environmental responsibility, and workplace safety.
Every power project has different technical requirements. We provide flexible customization services based on voltage level, installation environment, technical specifications, and project conditions.
Whether customers need standard products or project-specific solutions, our engineering team works closely with partners to provide suitable configurations.
We support international customers with professional export services, including technical communication, production arrangement, inspection, packaging, and transportation coordination.
According to product type and destination, we select suitable transportation methods such as sea shipping, land transportation, or combined logistics solutions.
The ZN63 (VS1)-12 is mainly used for indoor medium voltage power distribution systems up to 12kV. It is commonly installed in substations, industrial plants, renewable energy projects, and switchgear systems for circuit control and protection.
Solid sealed pole technology improves insulation reliability by protecting internal electrical components from dust, moisture, and environmental influence. It also helps reduce maintenance requirements and improves long-term operating stability.
Yes. We provide customized solutions according to customer technical requirements, including electrical parameters, installation conditions, and project application needs.
We control quality through professional design, material inspection, standardized manufacturing, and complete factory testing. Each product is inspected before shipment to ensure reliable performance.
Vacuum circuit breakers offer advantages such as low maintenance, fast interruption, long service life, and environmentally friendly operation. They are widely used in modern medium voltage distribution systems.
As a professional manufacturer of medium voltage electrical equipment, we continue to focus on providing safe, reliable, and efficient power distribution solutions for global customers.
Our ZN63 (VS1)-12 indoor solid sealed pole vacuum circuit breaker represents our commitment to quality engineering, advanced manufacturing, and customer-focused service. From product design to final delivery, we carefully control every step to ensure our equipment performs reliably in real-world applications.
If you are looking for a dependable 12kV indoor vacuum circuit breaker, medium voltage vacuum circuit breaker manufacturer, or solid sealed pole vacuum breaker solution, Jihui Electric is ready to support your project with professional technology and complete service.
We welcome global partners, power companies, engineering contractors, and industrial customers to contact us for technical consultation and customized power distribution solutions.
JiHui Electric Group Co., Ltd , high-end website construction, foreign trade website construction, marketing website construction, website optimization, development websites, corporate network marketing, search engine promotion, wechat mini program, corporate mailbox, short video operation, etc.
No. 161 Jingliu Road, Yueqing Economic Development Zone, Yueqing City, Zhejiang Province, China
jh.power@jihuielec.com
+86 18967711966
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