The KYN28-24 AC Metal-Enclosed Switchgear is a specially developed armored withdrawable metal-enclosed switchgear by Junray Electrical for the 20kV power grid. It overcomes the limitation of traditional 12kV medium-mounted cabinets that cannot be adapted to the 20kV voltage system. With a rated voltage of 24kV as the core parameter, it builds a professional and reliable indoor three-phase AC 50Hz power distribution solution. The equipment adopts a medium-mounted handcart structure, and the cabinet body is precisely processed from aluminized zinc steel plates. The overall structure is divided into four independent compartments: busbar chamber, circuit breaker chamber, cable chamber, and instrument chamber. Each area is physically isolated, ensuring the stability of high-voltage operation from the structural perspective. As a dedicated power distribution equipment for the 20kV power grid, its design and manufacturing fully comply with the strict standards of high-voltage power distribution scenarios. From insulation configuration, protection performance to safety interlocks, all are customized according to the requirements of the 20kV system, making it the standard power distribution equipment for 20kV substations and large industrial projects.
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Rated Voltage |
AC 24KV |
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Rated Frequency |
50Hz |
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Rated Current |
630A~4000A |
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Rated Short-time Withstand Current |
31.5kA/40kA/50KA |
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Protection Class |
IP5X Structure |
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Center-Mounted Draw-out Structure Installation Method |
Floor-standing |
The equipment has a rated voltage of AC 24kV, which can stably handle the high-voltage transmission demand of a 20kV power grid. Compared to the conventional 12kV middle-mounted cabinet, the voltage level has been doubled, completely solving the core problem that ordinary equipment cannot adapt to the 20kV power grid, and meeting the requirements for power distribution and control in high-voltage scenarios. Combined with the 24kV dedicated insulation components and thickened copper busbars, the insulation performance and current-carrying capacity are upgraded simultaneously, ensuring the long-term safe operation of the high-voltage circuit.
The cabinet of KYN28-24 AC Metal-Enclosed Switchgear has a protection level of IP5X, which is superior to the IP4X standard commonly adopted by 12kV middle-mounted cabinets. It can fully block dust intrusion and resist environmental moisture erosion. The fully sealed cabinet structure combined with dedicated sealing components can still protect the internal high-voltage components from external interference in high-humidity, dusty industrial environments, outdoor substations, etc., maintaining stable insulation and conductivity performance, and extending the equipment's service life.
The rated short-time withstand current covers three levels: 31.5kA, 40kA, and 50kA. It can withstand the highest 50kA short-circuit current impact, far exceeding the tolerance standards of ordinary 12kV equipment. When a power grid has a short-circuit fault, it can quickly bear the instantaneous large current, avoiding cabinet deformation, insulation breakdown, and other problems, ensuring the integrity of the equipment during power grid faults, and providing reliable support for power system protection.
It is equipped with mechanical and electrical dual interlocks to achieve five preventive functions: preventing the pulling of the handcart with load, preventing incorrect tripping and closing of the circuit breaker, preventing the closing of the grounding switch with power, preventing entering the live compartments with power, and preventing closing the circuit breaker when the grounding switch is closed. This eliminates the risk of incorrect operation from the root and ensures the safety of maintenance personnel. The middle-mounted handcart can be independently withdrawn, and single-circuit maintenance does not require the entire system to be shut down, enabling non-stop maintenance and suitable for scenarios with extremely high requirements for power continuity.
As the core incoming and outgoing lines and metering equipment of a 20kV power grid substation, it undertakes the tasks of receiving, distributing and controlling high-voltage electrical energy, meeting the stable power distribution requirements of the high-voltage side of the substation.
Suitable for the 20kV main power distribution system of large industrial parks, providing high-voltage power support for multiple factories and workshops within the park, ensuring continuous power supply and safe control for industrial production.
Power distribution for super-large data centers
The KYN28-24 AC Metal-Enclosed Switchgear can be applied to the 20kV high-voltage power distribution of super-large IDC data centers， meeting the uninterrupted power supply requirements of data centers， and providing reliable high-voltage power for core loads such as server clusters and cooling systems.
Serving 20kV power distribution projects for large infrastructure projects such as airports， high-speed rail hubs， and large venues， it is suitable for the high-voltage power demands during the construction and operation phases of the projects, ensuring the stable operation of the power system.
Providing 20kV-level power distribution solutions for factories with high-voltage requirements such as steel， chemical， and electronic manufacturing， meeting the power supply and protection requirements for large production equipment and high-voltage motors.
Junray Electrical is a professional Factory and Supplier of KYN28-24 AC Metal-Enclosed Switchgear in China. We have been deeply engaged in the research and manufacturing of high-voltage power distribution equipment for many years and possess a complete product research, production, and quality inspection system. The KYN28-24 product follows international and domestic standards such as IEC298 and GB3906 throughout its design and production process. Core components are selected from high-quality brands in the industry. Each device undergoes strict tests such as withstand voltage, insulation, and interlock before leaving the factory to ensure performance compliance. We have a professional technical team that can provide customized solutions based on the actual needs of the customer's 20kV power grid. At the same time, we offer a full-cycle service covering installation and commissioning, operation and maintenance training, and after-sales repair.
1. Can KYN28-24 directly replace the 12kV medium-mounted switchgear?
The rated voltage of KYN28-24 is 24kV, specifically designed for a 20kV power grid. Its insulation parameters and cabinet structure are all suitable for high voltage levels. The 12kV medium-mounted switchgear is only applicable to power grids of 12kV or below. The voltage levels do not match and they cannot be used interchangeably.
2. What specific environmental conditions can the KYN28-24 AC Metal-Enclosed Switchgear with IP5X protection level withstand?
The IP5X protection can completely prevent dust from entering, and also resist low-pressure water jets from all directions. It is suitable for high-humidity, dusty industrial workshops, outdoor substations, underground distribution rooms, etc., and no additional protective facilities are required.
3. What are the advantages of the in-between type handcart structure for maintenance?
The handcart can be withdrawn independently. In case of a single circuit failure, only the corresponding handcart needs to be withdrawn for maintenance, while the other circuits continue to operate. This enables maintenance without power outage, significantly reducing the downtime and is suitable for scenarios such as hospitals, data centers, and rail transit where power outages are not allowed.
4. What is the rated current range that this product can accommodate?
The rated current of the equipment covers 630A to 4000A. You can choose the corresponding current specification according to the customer's load requirements, meeting the different current demands ranging from small power distribution to large industrial projects.
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