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■Overview KYN28-24 armored removable metal-enclosed switchgear is based on the Jiangsu Provincial Electric Power Company's optimization design requirements for 24kV high-voltage switchgear. On the basis of drawing on advanced domestic and foreign technologies and fully optimizing the cabinet structure and primary components, our company Developed metal enclosed switchgear. This equipment fully meets the operation requirements of 20kV neutral point ungrounded system and is widely used in various large substations of power systems as well as power plants, industrial and mining enterprises and urban centers and other load-intensive areas for power control, protection and distribution. On the basis of the universal type, this equipment has also developed programmed operation switch equipment and double busbar switch equipment. |
KYN28-24 armored removable metal-enclosed switchgear |
■ Operating environment conditions
1. Maximum temperature: +40℃, minimum temperature -35℃, and the average value measured within 24 hours does not exceed 35℃.
2. The average daily relative humidity does not exceed 95%; the average monthly relative humidity does not exceed 90%.
3. The altitude does not exceed 1000m.
4. The surrounding air is not significantly contaminated by dust, smoke, corrosive and/or flammable gases, vapor or salt spray.
5. Earthquake intensity: no more than 8 degrees.
■ Technical Parameters
NO | Item | unit | parameter | |
1 | Rated voltage | kV | 24 | |
2 | Rated frequency | Hz | 50 | |
3 | Rated insulation level | 1minPower frequency withstand voltage (to ground, between phases/fracture) | kV | 65/79 |
Lightning impulse withstand voltage (to ground, between phases/fracture) | kV | 125/145 | ||
4 | Rated current | A | 630-3150 | |
5 | Rated short circuit breaking current | kA | 25、31.5、40 | |
6 | Rated short-circuit breaking current (peak value) | kA | 63、80、100 | |
7 | Rated short circuit breaking current | kA | 25、31.5、40 | |
8 | Rated peak withstand current | kA | 63、80、100 | |
9 | Auxiliary control circuit rated voltage | V | AC or DC 110/220 | |
10 | Protection level | IP4X(IP2X with circuit breaker door open or inside the compartment) | ||
■ Technical key points
●The product complies with the corporate standards of Jiangsu Electric Power Company and is suitable for 20kV neutral point ungrounded power grid systems. The power frequency withstand voltage reaches 65/79
(isolation fracture), and the lightning impulse withstand voltage is 125/145 (isolation fracture).
● This switchgear can be equipped with circuit breakers and electric grounding switches of electric chassis vehicles to achieve programmed operation.
● The optimized structure design inside the cabinet evens out the electric field and ensures electrical clearance.
●Using a sealed pole circuit breaker with optimized overall structure and insulation structure to enhance the insulation performance in the cabinet.
● Using flame-retardant shielding sleeves and contact boxes, the flame-retardant grade reaches VO level, and the electric field distribution of the insulation parts is more uniform.
● Optimize the heat convection channel and enhance the heat dissipation effect.
■ Schematic diagram of appearance structure
KYN28-24Armored removable metal enclosed switchgear appearance and structure drawing
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