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China KYN61-40.5 Air-Insulated Withdrawable Metal-Clad Switchgear Factory & Suppliers 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 complies 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 avg. ≤ 95% | Monthly avg. ≤ 90%
d. Seismic resistant level: < Grade 8
e. Ambient air: Free of corrosive/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: Outine dimension and structure of switchgear
A. Instrument room
B. Circuit breaker room
C. Busbar room
D. Cable room
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 KYN61-40.5 switchgear comply with?
The KYN61 switchgear conforms to IEC62271-200 and GB/T3906 standards, ensuring high operational safety with a built-in "five-protection interlock" function.
What types of circuit breakers are used in this switchgear?
The withdrawable 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 is the protection degree (IP Rating) of the enclosure and compartments?
The external enclosure features an IP4X protection degree, while the internal compartments and the panel when opened provide IP2X protection.
What are the standard external dimensions available?
The standard external dimensions (W x D x H) are 1400×2800×2600 mm, with an optional compact dimension of 1200×2600×2400 mm available.
What technical documents must be provided when ordering?
Clients need to provide the main wiring scheme, single-line diagrams, layout plans, control and protection requirements, component specifications, busbar bridge dimensions (if required), and any special operating condition notes.