24kV Medium Voltage lv and mv Switchgear

The Huajidian 24kV Medium Voltage lv and mv Switchgear serves as a core component of medium-voltage distribution infrastructure within industrial and utility power systems. Manufactured in China, the equipment benefits from mature production processes and a rigorous quality control system that ensures optimized performance. Utilizing an air-insulated design, the unit avoids the environmental risks and high maintenance burdens often associated with traditional gas-insulated systems. When paired with high-performance vacuum circuit breakers, it enables comprehensive safety management and control throughout the entire power distribution workflow. The product supports two system configurations—single busbar and sectionalized single busbar—offering the flexibility to adapt to the power supply architectures of distribution projects of any scale, from small to large. Fully compliant with domestic and international standards—including IEC 62271-200, GB 3906, DL 404, and DIN VDE 0670—the equipment ensures stable and compliant operation across diverse global markets.

As a specialized manufacturer of high- and low-voltage distribution equipment, Huajidian places a strong emphasis on enhancing both the practicality and safety of its products. This 24kV switchgear addresses the common shortcomings of traditional equipment—such as rigid structures, large footprints, difficult maintenance, and limited scalability—by leveraging an integrated modular design. This approach fully satisfies the high-standard power supply requirements of modern industrial development and urban power grid modernization projects.

Key Product Advantages

1. Multi-Layered Safety Protection: Zero Operational Risk

The equipment is outfitted with a mature and highly reliable "Five-Prevention" mechanical interlocking system. This system effectively eliminates the risk of operational errors—such as accidental circuit breaker switching (opening or closing), grounding while live, or closing the circuit breaker while the ground switch is engaged—by implementing mandatory mechanical interlocks at every critical operational stage. The cabinet enclosure maintains a standard protection rating of IP4X under normal operating conditions; with the circuit breaker compartment door open, the protection rating remains at IP2X. This effectively prevents the ingress of dust and debris while safeguarding personnel against accidental contact, thereby significantly enhancing on-site operational safety and ensuring the long-term operational stability of the equipment.

2. Dual Structural Options: Adaptable to Diverse Scenarios

To address the complex conditions often encountered at construction sites, Huajidian offers two distinct drawer-type structural options: center-mounted and floor-mounted. The center-mounted structure features a compact design, making it ideal for indoor power distribution rooms with limited available space. Conversely, the floor-mounted structure boasts superior load-bearing capacity and stability, rendering it suitable for industrial environments characterized by high loads and significant vibration. This structural versatility allows for customized configurations tailored to the specific needs of various industries and project sites, ensuring multi-purpose functionality and universal adaptability across a wide spectrum of applications.

3. Modular Design: Facilitating Convenient O&M and Future Expansion

The 24kV Medium Voltage lv and mv Switchgear utilizes an integrated modular architecture wherein each functional module operates independently and adheres to standardized specifications. The overall structure is compact, resulting in a minimal physical footprint. This standardized layout streamlines routine inspections, fault diagnostics, and future capacity expansion efforts. Users can rapidly replace faulty modules and scale up distribution capacity on demand, thereby effectively reducing operation and maintenance costs while extending the overall service life of the equipment.

4. Robust Environmental Adaptability and Operational Stability

The product demonstrates exceptional resilience to environmental conditions. It is designed for standard operation within a temperature range of -5°C to +40°C, with a 24-hour average temperature not exceeding 35°C. Additionally, a customized low-temperature version—capable of operating down to -25°C—is available to meet the specific requirements of projects located in severe cold regions. The equipment is suitable for operating altitudes up to 1000 meters; for high-altitude scenarios, specialized capacity derating solutions can be provided. It maintains stable operation in high-humidity environments (with a 24-hour average relative humidity not exceeding 95%) and possesses an earthquake resistance rating of Grade 8. The equipment is designed for use in standard environments free from corrosive gases, salt mist, and explosion hazards, thereby covering the vast majority of industrial and municipal power distribution applications.

Key Technical Parameters (Partial List)

Storage Requirements

To ensure that the equipment retains its original factory performance integrity, Huajidian 24kV switchgear units must be stored within their original packaging. The storage environment must be dry, shielded from direct light, and protected against rain. The permissible storage temperature range is -25°C to +55°C. Storage in environments characterized by high humidity, corrosive gases, salt mist, or flammable/explosive substances is strictly prohibited; such conditions could lead to cabinet corrosion, component aging, or degradation of insulation performance. Adherence to these storage guidelines ensures that the equipment remains in optimal condition and is ready for normal commissioning immediately following installation.

Real-World Application Case Study

Southeast Asia Intelligent Manufacturing Industrial Park: 24kV Power Distribution Project

In 2025, Huajidian supplied a large batch of 24kV Medium Voltage lv and mv Switchgear to a newly constructed intelligent manufacturing industrial park in Southeast Asia. This project encompasses multiple high-load production workshops and their associated office power distribution systems. Consequently, it imposes extremely stringent requirements on equipment safety, stability, and scalability, while also necessitating adaptation to the local tropical climate—characterized by high temperatures and high humidity.

Based on the specific operating conditions of the project, Huajidian developed customized solutions for the equipment to ensure optimal performance in high-humidity environments and under varying temperature conditions. Furthermore, a center-mounted structural design was selected to ensure compatibility with the park's compact power distribution rooms. The equipment complies with both international IEC standards and local grid regulations; utilizing a single-busbar sectionalized configuration, it enables segmented power supply across the park and facilitates effective fault isolation. Since commissioning over a year ago, the equipment has recorded zero operational errors and zero major faults. Its modular design has greatly facilitated the park's subsequent capacity expansion and power distribution system upgrades, effectively reducing project operation and maintenance costs. Thanks to its stable performance and customized service, the equipment has earned high recognition from the overseas client, leading to the establishment of a long-term cooperative partnership.

FAQ

Q1: What scenarios are suitable for Huajidian's 24kV switchgear?

This equipment is designed for medium-voltage power distribution scenarios ranging from 13.8kV to 24kV, at frequencies of 50Hz or 60Hz. It is widely applied in industrial plants, municipal power distribution networks, grid substations, commercial parks, and similar fields. It meets the diverse requirements—including power reception, distribution, intelligent monitoring, and safety protection—of various medium-to-high load power systems. Additionally, it supports customized adaptations for special operating conditions, such as high altitudes, low temperatures, and high humidity.

Q2: What safety protection features does this equipment incorporate?

The equipment features multiple layers of safety assurance: it is equipped with a professional "Five-Prevention" mechanical interlocking system to eliminate human operational errors; the cabinet enclosure features a high degree of protection to guard against external environmental interference and accidental human contact; it possesses Level 8 seismic resistance capabilities, making it suitable for complex geological environments; and it utilizes vacuum circuit breakers to ensure safe arc extinction, thereby guaranteeing the stability and safety of equipment switching and fault protection processes.

Q3: Does the 24kV Medium Voltage lv and mv Switchgear support customization and future expansion?

Yes, it does. The equipment employs a mature modular design, offering exceptional compatibility and scalability. Depending on on-site installation space and load requirements, two structural configurations—center-mounted and floor-standing—can be customized. The modular functional architecture supports the flexible expansion of power distribution modules, thereby accommodating the incremental load demands of a project. Furthermore, specialized solutions—such as low-temperature adaptation and high-altitude derating—can be tailored to meet the unique requirements of projects located in diverse regions.