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KYN28-12 11KV Armored Switchgear for Three-Phase AC Power Distribution System

Armored metal-enclosed medium-voltage switchgear, suitable for 3-phase AC 50Hz, 11KV single-bus and segmented systems. Core applications in high-voltage power distribution scenarios such as power plants, metallurgical plants, urban power grids, and new energy power stations to break load and short-circuit currents.

Features:
1. Equipped with "five-prevention" interlocking function, eliminating misoperation from operation logic to ensure power supply safety.
2. Rated short-time withstand current up to 40KA, capable of withstanding short-circuit high-current impact and reducing fault damage risk.
3. Rated lightning impulse withstand voltage 75KV, suitable for complex outdoor and industrial high-voltage environments.
4. Configurable with vacuum circuit breakers and other components to adapt to different high-voltage power distribution needs.
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  • KYN28-12

1. It has an accurate adaptive voltage range, with a rated voltage covering 7.2~12KV, and can operate stably in 11KV power systems. It meets the power supply needs of single-bus and single-bus section power systems, ensures voltage stability during power distribution, and avoids equipment failures caused by voltage adaptation issues.

2. It has strong current withstand capacity, with a rated peak withstand current of 100KA and a rated short-time withstand current of 40KA. It can withstand large current impacts in extreme situations such as short circuits, reducing the probability of equipment damage due to current overload and improving the reliability of power system operation.


3. It has excellent insulation performance, with a rated power frequency withstand voltage of 42KV/1min and a rated lightning impulse withstand voltage of 75KV. It effectively isolates electrical hazards, prevents leakage, short circuits and other problems caused by insulation failure, and adapts to complex power environments.


4. Its functional design meets the needs of power systems. It has the functions of breaking load current, short-circuit current and closing short-circuit current, which can meet various needs of current control in the power system in one stop. There is no need to equip additional equipment, reducing the system construction cost.


5. The component configuration is flexible. The removable part can be matched with different components such as vacuum circuit breakers and vacuum contactors. It can be customized according to the load characteristics and control requirements of the actual power system, improving the applicability of the equipment.


  1. Rated Voltage 7.2~12KV (suitable for 11KV system)

  2. Rated Current 630A

  3. Rated Frequency 50Hz

  4. Rated Short-Time Withstand Current 40KA

  5. Rated Peak Withstand Current 100KA

  6. Rated Power Frequency Withstand Voltage 42KV/1min

  7. Rated Lightning Impulse Withstand Voltage 75KV

  8. Protection Level Enclosure IP4X, IP2X between compartments

  9. Functional Characteristics With "five-prevention" functions, can break load current, short-circuit current and close short-circuit current

1. Industrial plant power distribution system: Used in the 11KV high-voltage power distribution link of industrial plants to realize high-voltage power distribution for production lines and large-scale equipment in the plant. Through stable current control and short-circuit protection, it ensures the continuity of industrial production power consumption and reduces production stagnation caused by power failures.

2. Urban power grid construction: Adapts to the power distribution needs of the 11KV voltage level of the urban power grid. As a key switchgear in the urban power grid, it realizes the power transmission and distribution to urban residential areas and commercial areas, improving the power supply reliability and safety of the urban power grid.


3. Power supply for large public facilities: Applied in the 11KV high-voltage power distribution system of airports, railway stations, large shopping malls and other public facilities. With its excellent insulation performance and current withstand capacity, it ensures the large-scale power demand of public facilities and avoids the impact of power problems on public services.


4. Supporting for new energy power stations: In the step-up power distribution link of new energy power stations such as photovoltaic power stations and wind power stations, it serves as 11KV switchgear to realize the collection and transmission of new energy power, ensuring the stable connection of new energy power to the power grid and improving the efficiency of new energy utilization.


Frequent Questions
  • 1. What do the "five-prevention" functions of this switchgear specifically refer to?
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    Usually, it refers to preventing incorrect opening and closing of circuit breakers, preventing opening and closing of disconnectors with load, etc., to ensure operation safety, subject to the actual configuration of the equipment.
  • 2. Can the components inside the switchgear be replaced?
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    The removable part supports the replacement of adaptive components such as vacuum circuit breakers, and the matching specifications and models should be selected.
  • 3. Does use in a high-humidity environment affect performance?
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    The enclosure has IP4X protection, which can prevent splashing water. In high-humidity environments, moisture-proof measures should be taken to avoid internal moisture.
  • 4. What items need to be checked regularly during the operation of the equipment?
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    It is recommended to regularly check the insulation performance, component status and cabinet tightness to ensure the normal operation of the equipment.
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