Product Overview

KYN28A-24 Electrical Circuit Control Monitoring Power Switchgear (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: GB3906-2006 “3.6-40. 5KV AC metal-enclosed switchgear and control equipment”, GB /T11022 “High voltage Common Technical Requirements for Switchgear and Control Equipment Standards”, IEC60298 “AC metal-enclosed switchgear with rated voltage above 1KV and below 52KV Control Equipment”, 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 environmental 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 (see Table 1)

Note: 1. The short-circuit capacity of the current transformer is considered separately;
2. The technical parameters of VS1-24 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 schemes.
3. The cabinet body is made of imported aluminum-zinc coated thin steel plate, processed by MINGE machine tools, and adopts advanced
Multi-folding process, connected with blind rivet nuts and high-strength bolts, with high precision, light weight and strong High degree of
accuracy and strong versatility of parts.
4. It can be equipped with VS1-24 series or imported VD4 series vacuum circuit breaker, which has wide applicability and reliability.
High performance, to achieve long-term maintenance-free.
5. The handcart is equipped with working and test positions, and each position has positioning and display devices, which is safe and reliable.
6. All kinds of handcarts can be changed according to modular building blocks to ensure that cars of the same specification can be freely
interchanged, with different specifications Cars must never enter.
7. Installation method of earthing switch
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.
2) Hoisting at the bottom of the large curved plate.
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

A、Busbar room   B、Circuit breaker handcart room   C、Cable room.   D、Relay instrument room.

1、Shell   2、Branch bus   3、Bus bushing   4、Main bus  5、Static contact device   6、Contact box   7、Current Transformer

8、Earthing switch   9、Cable   10. Lightning arrester   11. Ground bus   12. Loading and unloading partitions   13. Partition (trap)

14. Secondary plug   15. Circuit breaker handcart   16. Heating device   17. Withdrawable horizontal partition   18. Grounding switch operating mechanism
15. Bottom plate   20. Pressure relief device   21. Control wire ductDimensions (see Figure 2 and Table 2)