KYN28A-12 3 Phase Power Distrbuting Combined Switchgear Cabinet (hereinafter referred to as “switching device”), suitable for three-phase AC The 50Hz power system is used to receive and distribute electrical energy and control, protect and monitor the circuit.
This product conforms to the standard: GB3906 “3.6-40.5KV AC metal-enclosed switchgear and control equipment”, GB /T11022 “High-voltage switchgear Common technical requirements for equipment and control equipment standards”, IEC60298 “AC metal-enclosed switchgear and control equipment with rated voltage above 1KV and below 52KV “Preparation”, DL/T404 “Technical Conditions for Ordering Indoor AC High Voltage Switchgear”.

Model meaning

• Install a vacuum circuit breaker
  ● Rated voltage (KV)
  ● Design Number
  ● indoor
  ● Withdrawable
  ● Armoured

Normal use conditions

1. Ambient air temperature: the highest temperature is 40°C, the lowest temperature is -15°C.
   2. Humidity conditions: daily average relative humidity: ≤95%, daily average water vapor pressure does not exceed 2.2Kpa; Monthly average relative humidity: ≤90%, monthly average water vapor pressure does not exceed 1.8Kpa;
   3. Altitude: 1000m and below.
   4. Earthquake intensity: no more than 8 degrees.
   5. The surrounding air should not be significantly polluted by corrosive or combustible gas, water vapor, etc.
   6. There is no frequent severe vibration place.
   7. When used under normal environmental conditions exceeding GB3906, it shall be negotiated by the user and the manufacturer;

Technical parameters 

Note: 1. The short-circuit capacity of the current transformer is considered separately;
2. The technical parameters of ZN63A-12 are detailed in the corresponding samples of our company.

Product structure characteristics

Switchgear structure (see Figure 1).
2. Completely metal armored, assembled structure, wide combination scheme.
3. The cabinet body is made of imported aluminum-zinc coated thin steel plate, processed by MINGE machine tool, and adopts advanced multifolding technology, connected with rivet nuts and high-strength bolts, and has high precision and light weight. High strength, strong versatility of parts.
4. It can be equipped with VS1-12 series or imported VD4 series vacuum circuit breakers, with wide applicability, high reliability, and long-term maintenance-free.
5. The handcart is equipped with working and testing positions, and each position has positioning and display devices, which is safe and reliable.
6. All kinds of handcarts are changed according to modular building blocks to ensure that cars of the same specification can be freely interchanged, and cars of different specifications are absolutely not allowed to enter.
7. Earthing switch installation method: (1) Installed in the middle of the cabinet (front-mounted) to facilitate double-sided maintenance after the cabinet (Figure 1-a). (2) Installed at the back of the cabinet (rear-mounted) to save space and area against the wall (Figure 1-b).
8. Current transformer installation method: (1) The cable room at the rear of the cabinet is installed in the front; (2) The large bent plate is hoisted at the bottom.
9. Up to 9 single-core cables can be installed in the cable room.
10. Each high-pressure chamber has a pressure relief channel to ensure personal safety.
11. The highly reliable interlocking device fully meets the “five prevention” safety requirements.
12. The handcart is transported by a special carrier, which is easy to operate and flexible.
13. The front and rear doors are equipped with observation windows, which can facilitate the observation of the working status of the indoor components

1. Busbar room   B. Circuit breaker handcart room   C. Cable room   D. Relay instrument room,
2. Shell   2. Branch bus   3. Bus bushing   4. Main bus   5. Static contact device   6. Contact box
3. Current transformer   8. Grounding switch   9. Cable   10. Lightning arrester   11. Ground bus
4. Loading and unloading partitions   13. Partition (trap)   14. Secondary plug   15. Circuit breaker handcart
5. Heating device   17. Withdrawable horizontal partition   18. Ground operating mechanism   19. Bottom plate
6. Pressure relief device   21. Control wire duct

Technical parameters

Dimensions