KYN28-24 High Voltage Switchgear | IEC Certified 24kV Metal-Enclosed Switchgear from China Suppliers and Factory
Model Meaning
Product Standard
GB311.1 Insulation co-ordination - Part 1: Definitions, principles and rules
GB1984 High-voltage alternating-current circuit-breakers
GB3906 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV
GB/T11022 Common specifications for high-voltage alternating-current switchgear and controlgear standards
Common specifications for high-voltageswitchgear and controlgear standards
IEC62271-20:2003 High-voltage switchgear and controlgear - Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV
Conditions of Use
Altitude: ≤ 1000m;
Ambient Temperature: Upper limit +40℃, lower limit -15℃;
Relative Humidity: Daily average ≤ 95%; monthly average ≤ 90%;
Seismic Intensity: Does not exceed 8 degrees;
Environment: Not suitable for places with obvious pollution such as corrosive or flammable gas and water vapor, etc.
Special Service: When normal service conditions are not met, negotiations with the manufacturer are welcome.
Product Characteristics
The switchgear is designed with complete metal armor and fully enclosed structure.
The interior of the switchgear is divided into four independent compartments: circuit breaker room, busbar room, cable room, and relay instrument room. Each functional unit is sealed with metal plates and equipped with independent pressure release channel and release door.
The switch cabinet body is made of high-quality cold-rolled steel plate processed by CNC sheet metal forming, and connected by high-strength bolts, nuts and rivet nuts. The surface of the components is sprayed or galvanized; it can be equipped with VS1(ZN63A) vacuum circuit breaker and ABB's VD4 and Schneider's HVX series circuit breakers to meet the needs of different users.
The switchgear can perform circuit breaker opening and closing, moving-in/out, and ground switch opening and closing with the cabinet door closed.
The switchgear is designed to prevent misoperation of circuit breaker, prevent pushing trolley with load, prevent ground switch from transmitting power at the grounding position, and prevent accidental entry into live compartments, meeting the "five prevention" functions.
The convenient door panel observation window allows for viewing of the circuit breaker's on/off status, trolley position, energy storage position, and ground switch's on/off status.
The switchgear trolley has good interchangeability, and secondary wires are located in spacious cable trays, which are neat and easy to trace. The primary cable connection is highly convenient.
The protection level of the outer shell is IP4X, while the protection level is IP2X between small rooms and when the circuit breaker door is open. The installation and maintenance of the cabinet can be carried out on the front or back. It can be installed in a face-to-face or back-to-back double row arrangement, or against the wall according to project requirements, saving floor space and improving safety and flexibility.
Schematic Diagram of Switchgear Structure
Technical Parameter
Item |
Unit |
Argument |
||||
Rated voltage |
kV |
24 |
||||
Rated frequency |
Hz |
50/60 |
||||
Rated insulation level |
1min power frequency withstand voltage (effective value) |
kV |
Phase-phase, phase-ground |
65 |
Isolating distance |
79 |
Lightning impulse withstand voltage (peak value) |
kV |
Phase-phase, phase-ground |
125 |
Isolating distance |
145 |
|
Power frequency withstand voltage of auxiliary control circuit |
V |
2000 |
||||
Rated current |
A |
630, 1250, 1600, 2000, 2500, 3150 |
||||
Rated short-circuit breaking current |
kA |
20 |
25 |
31.5 |
||
Rated short-circuit making current (peak) |
kA |
50 |
63 |
80 |
||
Rated short-time withstand current (4s) |
kA |
20 |
25 |
31.5 |
||
Rated peak withstand current |
kA |
50 |
63 |
80 |
||
Rated voltage of auxiliary control circuit |
V |
110V/220V DC or AC 110V/220V |
||||
Protection level |
- |
IP4X / IP2X |
||||
Outline dimension (Width×Depth×Height) |
mm |
800×1810×2430 / 1000×1810×2430 |
||||
Weight |
kg |
840 ~ 1440 |
||||
Frequently Asked Questions (FAQ)
1. What manufacturing standards does this switchgear adhere to?
The switchgear complies with multiple national and international standards, including GB311.1, GB1984, GB3906, GB/T11022, and IEC62271-200:2003 for high-voltage AC metal-enclosed switchgear and controlgear.
2. What are the standard operating ambient conditions?
The equipment operates optimally at an altitude of ≤1000m, ambient temperature ranging from -15℃ to +40℃, seismic intensity ≤8 degrees, and daily average relative humidity ≤95% (monthly average ≤90%).
3. Which circuit breaker brands and models are compatible?
It can be configured with domestic VS1 (ZN63A) vacuum circuit breakers as well as international brands such as ABB VD4 series and Schneider HVX series circuit breakers.
4. What is the compartment structure and internal safety design?
The switchgear is divided into four independent compartments: circuit breaker room, busbar room, cable room, and relay instrument room. Each is separated by metal partitions and equipped with independent pressure relief doors and channels.
5. What protection degree does the switchgear offer?
The external enclosure features an IP4X protection rating, while the internal partitions and open circuit breaker door state maintain an IP2X protection rating.
6. How does the switchgear implement the "Five-Prevention" interlock?
The mechanical interlocks prevent misoperation of the circuit breaker, prevent moving the trolley under load, prevent the grounding switch from power transmission while grounded, and prevent accidental entry into live compartments.