KYN28-12 Type MV Switchgear
06-10 2025 | By:
1. Overview of KYN28 Switchgear
The KYN28 switchgear is a kind of indoor metal – clad withdrawable switchgear, which is widely used in power distribution and transmission systems. It is designed to operate in three – phase AC systems with frequencies of 50/60Hz and voltages ranging from 3.6kV to 12kV. This switchgear plays a crucial role in accepting and distributing electric power, and it also provides functions such as control, protection, and monitoring of the electrical circuits.
KYN28-12 Type MV Switchgear
2. Specification of KYN28 Switchgear
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Parameter
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Details
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Rated Voltage
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3.6kV, 6kV, 7.2kV, 12kV
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Rated Current
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630A, 1250A, 1600A, 2000A, 2500A, 3150A
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Rated Frequency
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50Hz (also available for 60Hz in some customized versions)
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Rated Short – time Withstand Current (4s)
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20kA, 25kA, 31.5kA, 40kA
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Rated Peak Withstand Current (Peak)
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50kA, 63kA, 80kA, 100kA
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Rated Short – circuit Breaking Current
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20kA, 25kA, 31.5kA, 40kA
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Rated Short Circuit Closing Current (Peak)
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50kA, 63kA, 80kA, 100kA
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Rated Insulation Level – 1min Power Frequency Withstand Voltage (Between Poles, Poles to the Ground)
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24kV, 32kV, 42kV
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Rated Insulation Level – Lightning Impulse Withstand Voltage (Peak, Between Poles, Poles to the Ground)
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40kV, 60kV, 75kV
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Degree of Protection
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The enclosure is IP4X, and when the compartment and circuit breaker room doors are opened, it is IP2X
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Product Dimensions (Height × Width × Depth)
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Generally, Height: 2300mm; Width: 800mm (for small branch bus with rated current up to 1250A, thermal stable current 40kA), 1000mm (for rated current of small branch bus over 1600A); Depth: 1500mm (cable incoming and outgoing), 1660mm (overhead incoming and outgoing)
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3. Application Scenarios
3.1 Power Generation Plants
In power generation plants, KYN28 switchgear is used to distribute the generated electrical energy to different sections of the plant. It can control the power supply to various auxiliary equipment, such as pumps, fans, and control systems. For example, it can be used to switch on and off the power of the cooling water pumps in a thermal power plant, ensuring the normal operation of the power generation process.
3.2 Industrial and Mining Enterprises
Industrial and mining enterprises often have complex power distribution systems. KYN28 switchgear can be applied in these enterprises to accept power from the grid and distribute it to different production workshops. In a large – scale manufacturing factory, the switchgear can be used to supply power to different production lines, such as the assembly line, the machining line, and the packaging line. It also provides protection functions to prevent damage to the electrical equipment in case of over – current, short – circuit, and other faults.
3.3 Secondary Substations
At secondary substations, KYN28 switchgear is responsible for receiving power from primary substations and further distributing it to end – users. It plays a key role in voltage transformation and power distribution. For instance, in a city’s urban power grid, secondary substations equipped with KYN28 switchgear can step down the high – voltage power from the primary substation to a suitable voltage level for residential and commercial use.
3.4 Starting of Large – sized HV Motors
When starting large – sized high – voltage (HV) motors, KYN28 switchgear can provide the necessary control and protection. It can smoothly start the motor and prevent excessive current during the starting process. In a mining operation, a large – sized HV motor used for ore – lifting equipment can be started and controlled by KYN28 switchgear, ensuring the safe and stable operation of the motor.
KYN28A Switchgear
4. Advantages of KYN28 Switchgear
4.1 High Safety Performance
The KYN28 switchgear is designed with multiple safety features. It has a “five – prevention” function, which includes preventing misoperation of the circuit breaker, preventing the handcart from being pushed or pulled under load, preventing the grounding switch from being closed when the circuit is energized, preventing the circuit from being energized when the grounding switch is in the grounding position, and preventing unauthorized access to the energized compartment. These safety measures effectively protect the safety of operators and equipment.
4.2 Wide Compatibility
This switchgear can be equipped with a variety of vacuum circuit breakers, both domestic and international brands. It can be compatible with domestic models like VCA and VS1, as well as well – known international brands such as ABB’s VD4 – I2 and Schneider’s EV12S. This wide compatibility allows users to choose the most suitable circuit breaker according to their specific needs and budgets.
4.3 Intelligent Control
Equipped with microprocessor – based relay protection devices, the KYN28 switchgear can be easily integrated into fieldbus control networks through the CAN communication interface. This enables functions such as remote control, telemetry, remote signaling, and remote adjustment. For example, in a smart grid system, operators can remotely monitor and control the operation status of the switchgear through a central control system, improving the operational efficiency and reliability of the power grid.
4.4 Compact Design and Easy Maintenance
The KYN28 switchgear is made of high – quality materials and processed by state – of – the – art CNC machining. It has a compact and robust design, which not only saves installation space but also simplifies maintenance. The handcart components are modular, so when a component fails, it can be easily replaced, reducing maintenance time and costs.
4.5 Superior Isolation and Cooling
The switchgear features a design that separates different functional compartments, which enhances safety and reliability. It is also equipped with dedicated pressure – relief channels and an effective cooling system. The pressure – relief channels can release the internal pressure in case of an arc – fault, protecting the integrity of the switchgear. The cooling system ensures that the switchgear can operate stably under long – term and high – load conditions.
5. Manufacturer: ZTELEC Yuguang Electric Technology (Henan) CO., Ltd.
ZTELEC Yuguang Electric Technology (Henan) CO., Ltd. is a leading manufacturer of electrical equipment. As a source factory, it has strong production capabilities and technical advantages.
- Customization Service: The company offers customization services, and it can produce products according to the specific requirements of customers. Notably, it can customize products to meet the standards of ABB brand, providing customers with high – quality and customized solutions.
- Quality Assurance: With advanced production equipment and strict quality control systems, ZTELEC Yuguang Electric Technology ensures that each KYN28 switchgear produced meets high – quality standards. The company adheres to international standards such as IEC 60298 and GB 3906 during the production process, ensuring the safety, reliability, and performance of the products.
- Technical Support: The company has a professional technical team that can provide comprehensive technical support to customers. From product design and installation to after – sales maintenance, the technical team can offer timely and effective solutions to customer problems, ensuring the normal operation of the switchgear.
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