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KYN61-40.5 Air-Insulated Withdrawable Metal-Clad Switchgear - Reliable China Suppliers and Factory for Power Distribution
Detail introduction
In the KYN61-40.5 withdrawable AC metal-clad switchgear, the handcart is equipped with an integrated ZN85 (VTD9) ND4-40.5 vacuum circuit breaker or a corresponding SF6 circuit breaker as the main switch. The design is compact, with superior performance and high reliability.
KYN61 switchgear comply with the standards: IEC62271-200, GB3906 as well as many other national specifications, with reliable "five-protection interlock" function, providing a safer environment for the operators, with high structure strength, safe and user-friendly, reduced installation and maintenance costs, can completely satisfy user requirements.
Service Conditions
- a Ambient temperature: -15℃~+40℃
- b Altitude: ≤1000M
- c Relative humidity: Daily average relative humidity ≤95%, Monthly average relative humidity ≤90%
- d Seismic resistant level: < Grade 8
- e Ambient air should be free of the pollution of corrosive or flammable gases, vapor, etc.
※Note: If the service environment exceeds the above conditions, please confirm with the manufacturer.
Technical Data
Main technical data of KYN61 switchgear
| Item | Unit | Technical parameters | |
| Rated voltage | kV | 40.5 | |
| Rated frequency | Hz | 50/60 | |
| Rated current of branch busbar | A | 630、1250、1600、2000、2500、3150 | |
| Rated insulation level | Power frequency withstand voltage (1 min) | kV | 95/118(isolating fracture) |
| Lightning impulse withstand voltage | 185/215(isolating fracture) | ||
| Power frequency withstand voltage of auxiliary circuit (1 min) | V | 2000 | |
| Rated short circuit breaking current (rms) | kA | 25、31.5 | |
| Rated short time making current (peak) | kA | 63、80 | |
| Rated short time peak withstand current | kA | 63、80 | |
| Rated short time withstand current (4s) | kA | 25、31.5 | |
| Rated voltage of auxiliary control circuit | V | DC110/220 AC220 | |
| Protection degree | - | External enclosure: IP4X (the panel open: IP2X) | |
| External dimensions of switchgear (W x D x H) | mm | 1400×2800×2600 / 1200×2600×2400(optional) | |
Structure features
KYN61 switchgear is designed as per the standard of metal-clad switchgear, conforms to IEC 62271 and GB/T3906. It mainly includes panel structure and the withdrawable part. The panel itself consists of four independent compartments: busbar compartment, circuit breaker compartment, cable compartment, low voltage compartment. The protection degree of enclosure is IP4X, and IP2X for compartments. The withdrawable part includes the main switch (or other functional components) and support part. (The structure is shown in drawing 1)
KYN61 switchgear provides bottom and overhead incoming and outgoing cable types, typical scheme including incomer, feeder, metering, measuring coupler, etc.
Drawing 1: Outline dimension and structure of switchgear
Compartments
A. Instrument room
B. Circuit breaker room
C. Busbar room
D. Cable room
Components
1. Panel 2. Circuit breaker 3. Contact box
4. Secondary plug device 5. Valve
6. Pressure relief device 7. Small busbar
8. Busbar bushing 9. Main busbar
10. Branch busbar 11. Fixed contact
12. Insulated clapboard 13. Earthing switch
14. Current transformer 15. Cable
16. Cable cover plate 17. Earthing busbar
Order Notes
The clients should provide the following documents:
- a Main wiring scheme No., single line system diagram, arrangement diagram and layout plan.
- b The requirements for control, measurement and protection of switchgears, and requirements for other interlocks and automatic devices.
- c Main components type, specification and quantity in switchgear.
- d If need busbar bridge, please provide the size of span and height.
- e If the switchgear used under special condition, please inform the details.
- f Please provide type and quantity if need additional parts.
Frequently Asked Questions (FAQ)
What standards does the KYN61 switchgear comply with?
The KYN61 switchgear complies with international and national standards including IEC62271-200 and GB3906, ensuring high structural strength, reliable performance, and safety.
What main switches can be installed in the handcart?
The handcart is equipped with an integrated ZN85 (VTD9) ND4-40.5 vacuum circuit breaker or a corresponding SF6 circuit breaker as the main switch.
What are the normal environmental service conditions for this switchgear?
Standard conditions include an ambient temperature of -15℃ to +40℃, altitude ≤1000m, daily average relative humidity ≤95% (monthly ≤90%), seismic resistance below Grade 8, and air free of corrosive or flammable gases.
What is the protection degree of the KYN61 switchgear?
The external enclosure protection degree is IP4X. When the panel is open, the internal compartments feature a protection degree of IP2X.
What are the main independent compartments inside the switchgear?
The switchgear panel consists of four independent compartments: the busbar compartment, the circuit breaker compartment, the cable compartment, and the low voltage compartment.
What information should be provided when placing an order?
Clients must provide the main wiring scheme, control/protection requirements, component specifications and quantities, busbar bridge dimensions (if needed), special environmental conditions, and requirements for additional parts.