1. Home
  2. Products
  3. High Voltage Power Equipment
  4. High Voltage Metal Clad Switchgear

High Voltage Metal Clad Switchgear

 High Voltage Metal Clad Switchgear
Product overview:

The KYN28A-12 high voltage metal clad switchgear is a complete power distribution equipment set with single busbar section systems whose rated voltage is 3-12kV with three-phase AC of 50Hz. It is used for power supply and distribution of transformer substations of electric power systems. The high voltage metal clad switchgear is vital in the starting of high voltage motors in power plants, generators, and power distribution units in industrial and mining enterprises. The KYN28A-12 switchgear can meet the requirements of GB3906, IEC298 and other standards. It is anti-interlocking, which is used to prevent circuit breaker malfunction, on-load operation, and grounding switch malfunction. The KYN28A-12 switchgear can be matched with the VD4 vacuum circuit breaker of the ABB Company, and can also be paired with the domestic VS1 vacuum circuit breaker, so it is indeed a superior piece of power distribution equipment.

The high voltage switchgear in the KYN28 performs on-off control, and protection for power generation, transmission, and electrical energy conversion. The electrical equipment features a voltage level of 12kV and is made up of a high-voltage circuit breaker, grounding switch, and a transformer.

The cabinet of the KYN28 switchgear includes two parts: the cabinet frame and the hand truck. All the hand trucks allow for easy transportation and flexibility. Testing and maintenance for the switchgear is simple thanks to the small size of the cabinet. Both the testing position and operating position of the cabinet and hand truck have a location limiting device, in order to ensure the reliable mechanical interlocking function. According to the different uses of the hand truck, it can be divided into: s transfer truck, PT truck, fuse truck, metering truck, isolation truck, lower PT truck, lower arrester truck and grounding truck.


The KYN28A-12 high voltage metal clad switchgear is suitable for power plants, and other low-voltage distribution systems.
In places such as large-scale power plants and petrochemical systems, which are highly automated and utilize a computer interface, the device works as low voltage power distribution equipment which is used for power supply/distribution systems, generator centralized control and reactive power compensation of which the three-phase AC frequency is 50Hz, rated voltage is 380V, and rated current is below 4000A.

Type and significance of the product:
Technical parameters:
Switchgear technical parameters
Item Unit Parameters
Rated voltage kV 3, 6, 10
Rated insulation level power-frequency withstand voltage (1min) kV 42
lightning impulse 75
Rated frequency Hz 50
Main busbar rated current A 630, 1250, 1600, 2000, 2500, 3150, 4000
4s thermal current (effective value) kA 16, 20, 25, 31.5, 40, 50
Rated Dynamic current (peak value) 40, 50, 63, 80, 100, 125
IP The outer shell is IP4X, The isolation room and breaker are IP2X
Vacuum Circuit-breaker Parameter:
Rated Voltage kV 10
Rated Frequency Hz 50
Rated Current A 630~4000
Rated short-circuit breaking current kA 15~50
Rated short-circuit current kA 40~125
Rated thermal current (valid values) kA 15~50
Rated thermal current(peak value) kA 40~125
Breaking times of Rated short-circuit breaking current Times 100
Rated Operating Sequence   off-0.3s-on off-180s-on/ off
power-frequency withstand voltage kV 42(lmin)
lightning impulse withstand voltage(peak value) kV 75
Mechanical service life Times 30000

1) 2500A circuit breaker can reach 3150A by air cooling 3150A breaker can reach 4000A by air cooling
2) When the operating voltage of the circuit breaker is below the rated voltage, the technical data is the same as the one of rated voltage
3) The parameters of the vacuum circuit breaker are determined by different types.


-The cabinet of high voltage metal clad switchgear is made of steel
-All operations are carried out when the cabinet door is closed
-It has high protection level, which can prevent pests and other unwanted conditions
-It has a simple and effective anti-locking function to prevent misoperation
-It can be matched with the VS1 and VD4 type vacuum circuit breaker
-It is simple to replace the circuit breaker, and the hand truck has good interchangeability
-The cabinet is installed on the wall, minimizing the space used
-The cable room is ample enough, so that multiple cables can be connected
-Circuit breakers and cable room can be equipped with heater to prevent condensation and corrosion.

Application environment:

-Altitude Height: ≤2000 m
-Maximum Air Temperature: +40 ℃
-The hottest monthly average air temperature: +30 ℃
-The highest yearly average air temperature: +20 ℃
-Minimum Air Temperature: -30 ℃ (Outdoor)
-Maximum daily average temperature difference: 25K
-Relative humidity average value is no more than 90%
-Ground surface horizontal acceleration: Lower than 3.0 m/s2
-Ground surface vertical acceleration: Lower than 1.5m/s2
-Pollution Level: Ⅲ Grade

Inquiry Form