I. Overview
KYN28A-12 (Z) armored withdrawable AC metal enclosed switchgear (hereinafter referred to as "switchgear") is suitable for three-phase AC 50Hz power systems, used for receiving and distributing electrical energy and controlling, protecting, and monitoring circuits. This product complies with the standards: GB3906 "3-35kV AC Metal Enclosed Switchgear", GB/T11022 "Common Technical Requirements for High Voltage Switchgear and Control Equipment", IEC60298 "AC Metal Enclosed Switchgear and Control Equipment with Rated Voltage of 1kV and Above".
II. Terms of Use
1. Surrounding air temperature: maximum temperature+40 ℃, minimum temperature -15 ℃;
2. Relative humidity: Daily average relative humidity: ≤ 95%, daily average water vapor pressure not exceeding 2.2KPa; monthly average
Relative humidity ≤ 90%; The monthly average water vapor pressure shall not exceed 1.8KPa;
3. Altitude: ≤ 1000m;
4. Earthquake intensity: not exceeding magnitude 8;
5. The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc;
6. Places without severe vibration;
7. When used beyond the normal conditions specified in GB3906, the user and our company shall negotiate.
III. Structural characteristics
1. All metal modular assembly structure, the cabinet is made of imported aluminum zinc coated plate with strong anti-corrosion ability, without surface treatment. It is processed by CNC high-precision equipment and adopts advanced multiple folding technology. The connection is made with rivet nuts and high-strength bolts, with high precision, light weight, and good strength.
2. The switchgear can be equipped with Vacuum circuit breakers such as VS1 series, VD4 series, ZN65 series, etc., with wide adaptability and strong interchangeability. The handcart is equipped with a working position, a testing position, and positioning and display devices at each position, ensuring safety and reliability.
3. The cable room can accommodate up to 9 single core cables, and the equipment has reliable mechanical and electrical interlocking devices, fully meeting the "five prevention" requirements. Each room is equipped with a pressure relief channel to ensure personal safety during operation.
| Model | Size |
| KYN28-12 | 100*170*230cm |
KYN28A-12 Armored removable enclosed switchgear for Reliable Medium Voltage Power Distribution
At Jihui Electric Group Co., Ltd., we focus on providing safe, stable, and efficient medium and low voltage power distribution solutions for global customers. With years of experience in electrical equipment manufacturing, we design and produce reliable power transmission products up to 35kV, including ring main units, Prefabricated Substations, transformers, Vacuum circuit breakers, and medium voltage switchgear.
Among our core products, the KYN28A-12 Armored Removable Enclosed Switchgear is one of the important solutions for modern medium voltage power systems. It is designed for 12kV indoor power distribution applications where safety, flexibility, easy maintenance, and stable operation are highly required.
As industries continue to increase their demand for reliable electricity, traditional fixed electrical equipment often faces challenges in maintenance, expansion, and operation safety. Our KYN28A-12 Medium Voltage Switchgear uses a withdrawable structure that allows operators to inspect, replace, and maintain key components more conveniently, helping reduce downtime and improve the overall reliability of power systems.
We manufacture each unit according to customer project requirements, technical standards, and application environments. Whether it is used in industrial plants, power substations, renewable energy projects, commercial buildings, or infrastructure facilities, our KYN28A-12 armored removable enclosed switchgear provides dependable electrical protection and distribution performance.
The KYN28A-12 Armored Removable Enclosed Switchgear is a type of indoor metal-clad medium voltage switchgear mainly used in 3.6kV to 12kV power distribution systems. It integrates circuit breakers, protection devices, measuring instruments, and control components inside a strong metal enclosure.
The word “armored” refers to the strong metal protection structure that separates different compartments inside the switchgear. This design improves safety by reducing the influence between high voltage parts, control systems, and cable connection areas.
The “removable” or “withdrawable” design means that the circuit breaker trolley can be moved in and out of the cabinet. Compared with traditional fixed switchgear, this structure allows faster maintenance and replacement without requiring a complete system shutdown for long periods.
In our production process, we pay attention to every detail, from enclosure manufacturing and electrical assembly to testing and final inspection. Our goal is not only to provide a product but also to provide a complete power distribution solution that customers can trust for many years.
The main function of KYN28A-12 Armored Removable Enclosed Switchgear is to receive, control, protect, and distribute electrical energy in medium voltage networks.
When electrical power enters the switchgear through incoming cables, the internal circuit breaker controls the connection and disconnection of the power supply. During normal operation, the circuit breaker keeps the electrical system running smoothly. When abnormal conditions such as short circuits, overloads, or electrical faults occur, protection devices detect the problem and send signals to disconnect the circuit quickly.
The internal structure is divided into several independent compartments, including the busbar compartment, circuit breaker compartment, cable compartment, and low voltage control compartment. This separation improves operational safety and makes inspection easier.
| Structure Component | Main Function | Benefit |
|---|---|---|
| Circuit Breaker Compartment | Controls power switching and fault protection | Improves system safety and maintenance efficiency |
| Busbar Compartment | Transfers electrical power between switchgear units | Ensures stable current transmission |
| Cable Compartment | Connects incoming and outgoing cables | Provides safe cable installation space |
| Control Compartment | Contains monitoring and protection devices | Supports intelligent operation management |
Source: Internal product structure design reference and IEC 62271-200 medium voltage switchgear requirements.
Safety is one of the most important requirements in medium voltage electrical systems. Our KYN28A-12 switchgear adopts a metal-clad design that provides strong mechanical protection and improves operator safety.
The internal compartments are separated by metal partitions, helping reduce the impact of electrical faults and improving protection performance during operation.
For power companies, industrial users, and engineering contractors, this structure provides greater confidence when operating electrical distribution equipment in demanding environments.
One of the biggest advantages of our KYN28A-12 medium voltage switchgear is the withdrawable circuit breaker design.
The breaker trolley can move between working position, test position, and disconnected position. This allows maintenance personnel to check equipment conditions more easily and reduces the time needed for equipment replacement.
| Feature | Fixed Switchgear | KYN28A-12 Withdrawable Switchgear |
|---|---|---|
| Maintenance Method | Requires more shutdown time | Faster inspection and replacement |
| Equipment Flexibility | Limited expansion capability | Supports easier system upgrading |
| Operation Safety | Depends on fixed structure | Separated compartments improve protection |
Source: Comparison based on common medium voltage switchgear designs and manufacturer technical evaluation.
Stable electrical performance is essential for industrial and infrastructure applications. Our KYN28A-12 armored removable enclosed switchgear is designed with high-quality insulation materials, reliable mechanical structures, and accurate protection systems.
The equipment can effectively handle daily switching operations while maintaining stable performance under different working conditions.
We conduct electrical tests, mechanical operation tests, insulation tests, and protection function checks before delivery to ensure every unit meets customer requirements.
Different projects have different requirements. For this reason, we provide flexible configuration options according to voltage level, protection requirements, cable layout, and installation environment.
Customers can select suitable circuit breakers, protection relays, measurement devices, and control solutions according to their project needs.
This flexibility makes KYN28A-12 withdrawable switchgear suitable for various medium voltage applications.
From our manufacturing experience, we understand that customers are not only looking for electrical equipment. They need products that can operate reliably for years, reduce maintenance costs, and support future system development.
| Technical Item | KYN28A-12 Performance | Customer Value |
|---|---|---|
| Rated Voltage | 12kV | Suitable for medium voltage distribution networks |
| Installation Type | Indoor metal-clad structure | Suitable for substations and industrial facilities |
| Breaker Type | Withdrawable vacuum circuit breaker | Easy maintenance and high reliability |
| Protection Design | Compartment separation structure | Improves operational safety |
Source: Product technical specifications and IEC 62271-200 medium voltage switchgear design guidelines.
At Jihui Electric, we continue improving our manufacturing technology and quality management system. With ISO9001 quality management certification, ISO14001 environmental management certification, and ISO45001 occupational safety certification, we control product quality from raw material selection to final delivery.
Our KYN28A-12 Armored Removable Enclosed Switchgear represents our commitment to providing safe, practical, and long-lasting medium voltage power distribution equipment for customers worldwide.
In our daily communication with customers, we find that medium voltage power distribution systems are becoming more important in almost every industry. Stable electricity is no longer only a requirement for large power plants. Factories, transportation systems, renewable energy projects, commercial buildings, and public infrastructure all need safe and reliable electrical equipment.
Our KYN28A-12 Armored Removable Enclosed Switchgear is designed for these real-world applications. With its compact structure, reliable protection, and convenient maintenance features, it can meet different power distribution requirements in various industries.
Power companies and electrical engineering contractors require switchgear that can operate continuously under different conditions. In substations, the KYN28A-12 medium voltage switchgear is commonly used for power receiving, distribution, control, and protection.
The armored structure provides additional protection for internal electrical components, while the withdrawable circuit breaker design helps maintenance teams complete inspection and replacement work more efficiently.
For regional power distribution networks, reliable medium voltage equipment helps reduce unexpected downtime and improves the stability of electricity supply.
Modern factories depend heavily on stable electricity. Production lines, automation systems, motors, compressors, and other industrial equipment require continuous power support.
Our KYN28A-12 indoor MV switchgear is suitable for manufacturing plants such as automotive factories, machinery production facilities, chemical plants, metal processing factories, and industrial parks.
By providing safe power control and protection, the equipment helps companies maintain stable production and reduce losses caused by electrical failures.
With the rapid development of renewable energy, solar farms and wind power projects require advanced medium voltage distribution solutions.
Energy generated by renewable systems usually needs to be collected, controlled, and transferred through medium voltage networks before connecting to the power grid.
Our KYN28A-12 armored removable enclosed switchgear can be integrated into renewable energy power systems to provide reliable switching and protection functions.
Large commercial buildings, airports, railway stations, hospitals, and data centers require highly reliable electrical systems because power interruption can affect daily operations.
The compact design and stable operation of our 12kV withdrawable switchgear make it suitable for indoor installation where safety, space utilization, and easy maintenance are important considerations.
| Application Field | Typical Requirements | KYN28A-12 Solution |
|---|---|---|
| Power Substations | High reliability and protection | Metal-clad structure with safe compartment design |
| Industrial Plants | Continuous production power supply | Stable switching and fault protection |
| Renewable Energy | Medium voltage collection and control | Flexible configuration and reliable operation |
| Commercial Buildings | Safe indoor installation | Compact design and convenient maintenance |
Source: Application analysis based on IEC medium voltage distribution practices and Jihui Electric project experience.
At Jihui Electric, we believe that product quality starts from every small manufacturing detail. A reliable switchgear cabinet is not only about assembling electrical components. It requires accurate engineering design, strict production control, and professional testing.
Before production begins, our engineering team communicates with customers to confirm technical requirements, including voltage level, current rating, installation conditions, protection requirements, and operating environment.
For customized projects, we adjust the internal layout, component selection, and configuration according to customer drawings and technical specifications.
The cabinet frame is the foundation of the KYN28A-12 armored removable enclosed switchgear. We use precision processing equipment to ensure accurate dimensions and strong mechanical performance.
The metal enclosure is manufactured with attention to structural strength, surface treatment, and long-term durability. Proper cabinet manufacturing helps ensure reliable operation throughout the equipment life cycle.
During assembly, our technicians install vacuum circuit breakers, busbars, protection devices, control systems, and cable connection components according to approved drawings.
Each connection point is carefully checked because even small installation errors may influence electrical performance.
Before shipment, every switchgear unit goes through inspection and testing procedures. These tests help confirm that the equipment meets design requirements and customer expectations.
| Testing Item | Purpose |
|---|---|
| Insulation Test | Verify electrical insulation performance and safety |
| Mechanical Operation Test | Check circuit breaker movement and switching reliability |
| Protection Function Test | Confirm relay and control system operation |
| Appearance Inspection | Ensure cabinet quality and transportation protection |
Source: Jihui Electric production inspection procedures and standard medium voltage equipment testing requirements.
Choosing a medium voltage switchgear supplier is not only about purchasing equipment. It is about finding a partner who understands electrical systems, project requirements, and long-term operation needs.
At Jihui Electric Group Co., Ltd., we combine product development, manufacturing capability, quality management, and customer service to provide complete power distribution solutions.
We specialize in medium and low voltage power transmission and distribution equipment up to 35kV. Our product range covers Cable accessories, Cable distribution boxes, ring main units, prefabricated substations, transformers, SF6 load switches, vacuum circuit breakers, and medium voltage switchgear.
This complete product system allows us to better understand customer projects and provide suitable solutions instead of only supplying individual products.
Quality stability is one of our main priorities. We operate according to internationally recognized management systems, including ISO9001 quality management, ISO14001 environmental management, and ISO45001 occupational health and safety management standards.
From raw material inspection to final product testing, we control every production stage to ensure consistent product quality.
Different countries and industries have different electrical requirements. We provide flexible solutions according to customer voltage standards, installation conditions, and project specifications.
Our engineering team can support customers with technical communication, product selection, and project cooperation.
For international customers, we understand that delivery reliability is very important. According to product type, quantity, and destination, we arrange suitable transportation methods including sea transportation, land transportation, and combined logistics solutions.
Before shipment, products are professionally packed with moisture protection, shock protection, and collision prevention measures to ensure safe arrival.
KYN28A-12 Armored Removable Enclosed Switchgear is mainly used for indoor 12kV medium voltage power distribution systems. It is widely applied in substations, industrial facilities, renewable energy projects, and infrastructure applications for electrical control and protection.
The withdrawable design allows the circuit breaker trolley to move between working, testing, and disconnected positions. This makes inspection, maintenance, and replacement easier compared with fixed switchgear structures.
Yes. KYN28A-12 medium voltage switchgear is suitable for many industrial environments, including manufacturing plants, mining facilities, chemical industries, and large industrial parks where stable electrical distribution is required.
Yes. We provide customized solutions according to customer technical requirements, project conditions, voltage levels, and application environments. Our engineering team supports customers from technical confirmation to final delivery.
We control product quality through strict manufacturing processes, professional testing procedures, and international management systems including ISO9001, ISO14001, and ISO45001 certifications.
At Jihui Electric, we understand that electrical equipment plays an important role in keeping industries running safely and efficiently. Our KYN28A-12 Armored Removable Enclosed Switchgear is developed based on practical application needs, combining safety, reliability, flexible maintenance, and long service life.
From power utilities and industrial factories to renewable energy and infrastructure projects, we provide dependable medium voltage switchgear solutions for customers around the world.
With professional manufacturing experience, strict quality control, and complete technical support, we continue helping global partners build safer and more efficient power distribution systems.
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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