KYN28-12 Medium Voltage Vacuum Switchgear

The Huajidian KYN28-12 Medium Voltage Vacuum Switchgear is a complete set of indoor medium-voltage power distribution equipment, precision-engineered and manufactured at our standardized production facility. It is primarily deployed for power transmission from generators in small-to-medium-sized power plants, power reception and distribution in substations within industrial and mining enterprises, and the starting control of large high-voltage motors. The system enables intelligent, end-to-end management of the power distribution network—including safety protection and real-time monitoring—thereby effectively mitigating electrical faults and ensuring the stable operation of electrical equipment.

This product strictly adheres to authoritative domestic and international standards—including IEC62271-200, IEC298, GB3906, DL404, and DIN.VDE0670—ensuring stable quality and a high degree of standardization. The equipment supports wall-mounted installation and features a front-access maintenance design; when paired with dedicated current transformers, this configuration allows O&M personnel to perform routine inspections and equipment servicing directly from the front of the cabinet, significantly enhancing operational convenience and maintenance efficiency.

Operating Environmental Conditions

To ensure the long-term stability and reliable operation of the equipment, the applicable environmental requirements for the Huajidian KYN28-12 Medium Voltage Vacuum Switchgear are as follows:

1.  Ambient Temperature: Maximum +40°C, Minimum -15°C. This range makes it suitable for the vast majority of indoor power distribution scenarios in temperate and subtropical regions.

2.  Ambient Humidity: Daily average relative humidity ≤ 95%; Monthly average relative humidity ≤ 90%. These limits effectively prevent insulation failures within the equipment that could otherwise be triggered by high-humidity environments.

3. Altitude: Suitable for altitudes ≤ 2500 meters, meeting the power supply requirements of most inland industrial and municipal engineering projects.

4. Air Environment: The operating environment must be free from corrosive fumes, toxic or harmful gases, flammable or explosive gases, industrial steam, salt mist, and other pollutants, thereby preventing corrosion of equipment components and damage to insulation.

Core Product Features

1. Anti-Misoperation Design: High Operational Safety

The equipment is equipped with mature and reliable mechanical interlocking mechanisms designed to prevent misoperation. This establishes a multi-dimensional safety protection system that effectively eliminates common human errors—such as inadvertently opening cabinet doors, accidental closing of circuits, or improper grounding—thereby averting electrical safety accidents and comprehensively safeguarding the personal safety of operation and maintenance personnel as well as the operational stability of the power distribution system.

2. Flexible Installation and Operation Modes: Wide Adaptability

The KYN28-12 Medium Voltage Vacuum Switchgear supports two types of mobile mechanisms: center-mounted trolleys and floor-mounted trolleys. This adaptability allows it to suit the specific site layouts and maintenance practices of diverse clients. It meets the technical requirements of various scenarios—including industrial production lines, municipal power distribution stations, and new energy power plants—offering flexible equipment arrangement as well as convenient commissioning, replacement, and maintenance.

3. Multi-Standard Compliance: Exceptional Compatibility

The complete unit complies with numerous international and domestic industry standards, demonstrating excellent universality and equipment compatibility. It integrates seamlessly with mainstream power distribution systems and auxiliary electrical equipment currently on the market, thereby simplifying project design and construction processes while facilitating future equipment upgrades and retrofits.

4. Front-Access Maintenance Design: Efficient and Convenient Servicing

Addressing the common pain point of cumbersome maintenance associated with traditional high-voltage switchgear, this product features a front-access maintenance structure. Paired with dedicated current transformers, the design allows all routine inspections, parameter adjustments, and fault troubleshooting to be performed entirely from the front of the cabinet. This eliminates the need for complex work within confined spaces, significantly reducing maintenance difficulty and enhancing the efficiency of after-sales service.

Core Technical Parameters

Real-World Application Case Study

Municipal Power Grid Upgrade Project (Putian 220kV Licheng Substation)

In this substation's 10kV busbar upgrade project, all aging equipment was completely replaced with Huajidian KYN28-12 switchgear. Addressing the critical challenges of a tight project schedule and stringent requirements for continuous power supply, the equipment's modular structure enabled rapid installation and commissioning. Furthermore, by leveraging its reliable anti-misoperation interlocking mechanisms and intelligent protection functions, the project achieved a significant enhancement in the stability of the substation's power distribution system. Following the project's commissioning, the 10kV section achieved zero-fault operation, successfully completing the upgrade of municipal grid equipment and ensuring a stable power supply for surrounding residents and commercial facilities.

FAQ

Q1: What scenarios are suitable for the Huajidian KYN28-12 Medium Voltage Vacuum Switchgear?

This product is designed for use in 3.6–12kV, 50/60Hz three-phase AC medium-voltage power systems, supporting both single-busbar and sectionalized single-busbar system configurations. It is widely utilized for power transmission from medium-to-small-scale power plants, power reception and distribution in substations within industrial and mining enterprises, and the starting control of large high-voltage motors. Additionally, it is well-suited for various indoor medium-voltage power distribution scenarios, including municipal substations, industrial parks, new energy photovoltaic power stations, and public utility power supply systems.

Q2: What are the safety protection advantages of this switchgear compared to traditional equipment?

This product employs a dual mechanical-plus-electrical safety protection system, offering superior protection compared to traditional equipment with single-layer safeguards. First, it is equipped with specialized mechanical interlocking devices that physically prevent operational errors. Second, it complies with numerous domestic and international standards and features comprehensive protection functions against overcurrents, short circuits, and lightning strikes. Third, it incorporates a front-access design for operation and maintenance, thereby eliminating safety hazards associated with internal cabinet work. Fourth, the cabinet enclosure meets the IP4X protection standard, guarding against dust and the ingress of foreign objects to comprehensively enhance the operational safety and stability of the equipment.

Q3: What are the recommended maintenance cycles and daily care guidelines for this equipment?

This equipment features low maintenance costs and a long service life; the standard comprehensive inspection cycle is 6 months, while a major overhaul is recommended every 3 years. Daily maintenance simply requires checking the cabinet's sealing integrity, the smooth movement of the withdrawable trolley, the intactness of the interlocking devices, and verifying that monitoring parameters are within normal ranges. It is essential to ensure that the operating environment remains free of corrosive, flammable, or explosive contaminants, and that temperature and humidity levels comply with the equipment's specifications. Thanks to its front-access design for maintenance, inspections and commissioning can be completed without the need to disassemble the entire unit—offering high efficiency and peace of mind while significantly reducing long-term maintenance costs.