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■ Overview
KYN28-12 armored removable metal-enclosed switchgear (referred to as switchgear) is a complete set of equipment for three-phase AC 50Hz busbar and segmented busbar systems. It is used to receive and distribute 3-12kV network power and implement automatic control of circuits. Monitoring and event recording. It is widely used in various substations of power systems as well as high-voltage power distribution in power plants, industrial and mining enterprises and institutions. This series of center-mounted switch cabinets can be equipped with vacuum circuit breakers such as VD4, EV12S, VED4, VS1 with spring mechanisms, and VS1-12/M vacuum circuit breakers with permanent magnet mechanisms. In addition to passing the specified type test, this product also passed the internal fault arc effect and condensation test, making it suitable for harsh use conditions. | KYN28-12 armored removable metal-enclosed switchgear |
■ Normal usage conditions
1. Ambient temperature: upper limit +45℃, lower limit -35℃; (storage and transportation allowed at -45℃);
2. Altitude: no more than 1000m;
3. Relative humidity: daily average below 95%, monthly average below 90%;
4. The earthquake intensity does not exceed level 8;
5. A place without fire, explosion risk, serious pollution, chemical corrosive gas and severe vibration.
Note: Anything beyond the above requirements shall be determined by the user and the manufacturer through consultation. For special places, such as underground substations and other poor operating environments, dehumidification equipment should be added indoors to improve product operating conditions and ensure safe and reliable operation of the equipment.
■ Technical Parameters
NO | Item | unit | Parameter | |
1 | Rated voltage | kV | 12 | |
2 | Insulation level | 1min Power frequency withstand voltage (to ground, between phases/fracture) | kV | 42/48 |
Lightning impulse withstand voltage (to ground, between phases/fracture) | kV | 75/85 | ||
3 | Rated frequency | Hz | 50 | |
4 | Main bus rated current | A | 630、1250、1600、2000、2500、3150、4000 | |
5 | Rated short-time withstand current (4s) | kA | 25、31.5、40、50 | |
6 | Rated peak withstand current | kA | 40、50、63、80、100、125 | |
7 | Creepage distance | mm/kV | 20 | |
8 | Protection level | IP4X | ||
9 | weight | kg | ≥800 | |
■ Technical key points
● This switchgear can be equipped with circuit breakers and electric grounding switches of electric chassis vehicles to achieve programmed operations.
● Use D-type or O-type busbars and epoxy resin vulcanization process to achieve full insulation, improve the electric field distribution in the cabinet, and improve the overall insulation level of the switchgear.
●Passed the 0.5S internal fault arc test and has the ability to resist fault arc effects.
● It has functions such as temperature and humidity, automatic thermal convection ventilation and heat dissipation, internal failure and explosion-proof, etc. It adopts a universal mechanical interlocking device, which is highly reliable and maintenance-free.
■ Schematic diagram of appearance structure
KYN28-12 Armored removable metal enclosed switchgear appearance and structure drawing
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