Yongce Group Co., Ltd.
Complete Product Introduction
1. Product Brief Introduction
The KYN28A-12 type indoor AC metal-clad withdrawable switchgear is applicable to the three-phase AC power system with a rated voltage of 12kV and a rated frequency of 50Hz. It is used for receiving and distributing electricity, as well as controlling, protecting and monitoring the circuit.
Compliant with standards:
GB3906-2006 《3.6~40.5kV AC metal-enclosed switchgear and controlgear》
GB11022-89 《General technical conditions for high-voltage switchgear》
IEC298(1990) 《Metal-enclosed switchgear and controlgear for rated voltages above 1kV up to and including 50kV》
DL404-97 《Technical conditions for ordering indoor AC high-voltage switchgear》
2. Model Meaning & Explanation
The coding of the product model contains the core structural characteristics and parameter information of the switchgear. The specific meaning of each part of the model is as follows:
- K: Metal-clad type
- Y: Withdrawable (handcart/mid-mounted type)
- N: Indoor
- 28A: Design serial number
- 12: Rated voltage
- □ (Primary circuit scheme):
G: For coastal areas
TA: For hot zones
TH: For humid tropics
- □ (Environmental characteristic code): Corresponding environmental adaptation mark
3. Normal Operating Conditions
- Ambient air temperature: Maximum +40℃, minimum -15℃;
- Relative humidity: Daily average ≤ 95%; Daily average water vapor pressure ≤ 2.2kPa; Monthly average relative humidity ≤ 90%; Monthly average water vapor pressure ≤ 1.8kPa;
- Altitude: Below 1000m;
- Seismic intensity: Not exceeding 8 degrees;
- Ambient air shall be free from obvious pollution by corrosive or flammable gases, water vapor, etc.;
- No violent vibration site;
- When used under conditions beyond the normal conditions specified in GB3906, it shall be negotiated between the user and our company.
4. Product Characteristics
- KYN28A-12 switchgear adopts metal-clad withdrawable structure, which has high safety and reliability, and is easy to install and maintain;
- It has excellent insulation performance and short-circuit resistance, which can effectively protect the safe operation of the power system;
- The modular design is adopted, which is flexible in configuration and can be customized according to user needs to meet different application scenarios;
- It has complete protection functions, including overcurrent, short circuit, grounding and other protection, and can realize comprehensive monitoring of the circuit.
5. Main Technical Parameters of Vacuum Circuit Breaker
| Item | Unit | Value |
|---|---|---|
| Rated voltage | kV | 3.6, 7.2, 12 |
| Rated frequency | Hz | 50 |
| Rated current of circuit breaker | A | 630, 1250, 1600, 2000, 2500, 3150 |
| Rated current of switchgear | A | 630, 1250, 1600, 2000, 2500, 3150 |
| Rated short-time withstand current (4s) | kA | 16,20,25,31.5,40,50 |
| Rated peak withstand current (peak value) | kA | 40,50,63,80,100,125 |
| Rated breaking current | kA | 16,20,25,31.5,40,50 |
| Rated short-circuit making current (peak value) | kA | 40,50,63,80,100,125 |
| Rated insulation level | kV | 1min power frequency withstand voltage: 24, 32, 42 |
| Lightning impulse withstand voltage: 40, 60, 75 | ||
| Protection grade | - | IP4X for outer casing, IP2X when the circuit breaker chamber door is open (blackout interval) |
6. Overall Dimensions & Structure
The structural diagram of the switchgear is as follows, which includes the main functional compartments and key components to ensure the safe and stable operation of the equipment:
7. Ordering Notes
When placing an order for the KYN28A-12 switchgear, please provide the following information to ensure that the product meets the actual use requirements:
- Exact product model and specification (including environmental characteristic code and primary circuit scheme if applicable);
- Required rated current, short-time withstand current and peak withstand current parameters;
- Operating environmental conditions (if special requirements such as high altitude, severe cold, coastal areas, etc.);
- Special technical requirements (such as customized protection functions, auxiliary components, etc.);
- Configuration requirements for internal components (such as type of vacuum circuit breaker, current transformer ratio, etc.).
