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KYN28-24 High Voltage Cabinet | IEC Certified 24kV Switchgear from China Suppliers & Factory for Reliable Power Distribution
Model Meaning
Product Standard
- GB311.1 Insulation co-ordination-Part1:Definitions,principles and rules
- GB1984 High-voltage alternatiing-current circuit-breakers
- GB3906 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kVand 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 of ambient air temperature +40℃, lower limit -15℃;
- Relative humidity: The daily average relative humidity shall not exceed 95%; monthly average relative humidity shall not exceed 90%;
- Seismic intensity: The seismic intensity does not exceed 8 degrees;
- It's not suitable for places with obvious pollution such as corrosive or flammable gas and water vapor, etc.
- When the above normal service conditions are not met, the user can negotiate with the manufacturer.
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 of the switchgear 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 the secondary wires are located in spacious cable tray, which are beautiful and easy to find. The primary cable connection is 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. The switchgear can not only be installed in a face-to-face or back-to-back double row arrangement, but also can be installed against the wall according to specific project requirements, which saves floor space and improves the safety and flexibility of the switchgear.
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 | 63,012,501,600,200,000,000,000 | ||||
| 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
What standards does this switchgear comply with?
The switchgear is designed and manufactured in strict compliance with major industry standards, including GB311.1, GB1984, GB3906, GB/T11022, and IEC62271-20:2003.
What are the environmental requirements for installation?
It is suitable for altitudes up to 1000m, ambient temperatures between -15℃ and +40℃, and daily relative humidity under 95% (monthly under 90%). It should not be installed in locations with high concentrations of corrosive or flammable gases, or excessive water vapor.
Which brands of circuit breakers are compatible with this cabinet?
The unit can be flexibly configured with domestic VS1 (ZN63A) vacuum circuit breakers, as well as premium international options like ABB's VD4 and Schneider's HVX series circuit breakers.
What safety mechanisms are built into the design?
It features complete metal armor, a fully enclosed partition structure, and independent pressure release doors for each compartment. It also incorporates a comprehensive "five prevention" system to prevent accidental operations, such as moving the trolley under load or entering live compartments.
What is the enclosure protection rating (IP code)?
The outer enclosure features an IP4X protection level. When the circuit breaker door is open or between internal compartments, the protection level is IP2X.
Can the switchgear be installed directly against a wall?
Yes. While it supports face-to-face and back-to-back double-row layouts, it can also be installed flush against the wall to optimize floor space and adapt to specific project layouts.