Yongce Group Co., Ltd.
Complete Product Introduction
1. Product Brief Introduction
The ZN63(VS1)-12 series indoor fixed high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor switchgear with a rated voltage of 12kV. It is used for control and protection in industrial and mining enterprises, power plants and substations, electrical equipment, and is suitable for places with frequent operation. The operating mechanism is integrated with the circuit breaker body, which can be installed as a fixed type or equipped with a special propulsion mechanism to be used as a handcart unit. The main circuit part can adopt an integral sealed polar pole to miniaturize the circuit breaker, with high reliability, easy maintenance. It can be equipped with KYN28A-12(GZS) medium voltage withdrawable switchgear, and the fixed type can be matched with XGN series fixed switchgear.
2. Model Meaning & Explanation
The coding of the product model contains the core structural characteristics and parameter information of the vacuum circuit breaker. The specific meaning of each part of the model is as follows:
3. Normal Operating Environment
- Ambient temperature: not higher than 40℃, not lower than -10℃ (allowed to be transported at -30℃);
- Altitude: not exceeding 1000m. If exceeding the altitude, the insulation level shall be increased accordingly;
- Relative humidity: daily average value not more than 95%, average value of saturated water vapor pressure not more than 2.2×10⁻³MPa, monthly average value not more than 1.8×10⁻³MPa;
- Earthquake intensity: not exceeding 8 degrees;
- No fire, explosion, serious pollution, chemical corrosion and severe vibration places.
4. Product Characteristics
- Integrated design of operating mechanism and breaker body, compact structure and small size, easy installation and maintenance;
- Adopt integral sealed polar pole for main circuit, good insulation performance and high reliability;
- Suitable for frequent operation, strong environmental adaptability, meeting the use requirements of various industrial and mining enterprises and power systems;
- Compatible with multiple types of switchgear (withdrawable/fixed), strong versatility and flexible configuration.
5. Main Technical Parameters
| Serial No. | Item | Unit | Data | ||
|---|---|---|---|---|---|
| 01 | Rated Voltage | kV | 12 | ||
| 02 | Maximum Operating Voltage | kV | 12.5 | ||
| 03 | Rated Current | A | 630 1250 | 630 1250 1600 2000 2500 3150 | 1250 1600 2000 2500 3150 4000 |
| 04 | Rated Short-Circuit Breaking Current (Rated Short-Time Withstand Current - RMS) | kA | 20/25 | 31.5 | 40 |
| 05 | Rated Short-Circuit Making Current (Peak) | kA | 50/63 | 80 | 100 |
| 06 | Rated Peak Withstand Current (Rated Making Current - Peak) | kA | 50/63 | 90 | 100 |
| 07 | 4s Rated Short-Time Withstand Current | kA | 20/25 | 31.5 | 40 |
| 08 | Insulation - Power Frequency Withstand Voltage (1min after opening/closing) | kV | To ground 42 (Break 48) | ||
| Insulation - Lightning Impulse Withstand Voltage (Peak after opening/closing) | kV | Horizontal: To ground 75 (Break 85) | |||
| 09 | Rated Heating Time | s | 4 | ||
| 10 | Operating Sequence | - | Open-0.3s-Close-180s-Close | ||
| 11 | Mechanical Life | times | 20000 | ||
| 12 | Rated Short-Circuit Breaking Current Operating Times | times | 50 | ||
| 13 | Rated Closing Voltage of Operating Mechanism (DC) | V | AC, DC 110, 220 | ||
| 14 | Rated Opening Voltage of Operating Mechanism (DC) | V | AC, DC 110, 220 | ||
| 15 | Contact Opening Distance | mm | 11±1 | ||
| 16 | Overshoot (Contact Spring Compression Length) | mm | 3.5±0.5 | ||
| 17 | Three-Phase Open/Close Asynchronism | ms | ≤2 | ||
| 18 | Contact Closing Bounce Time | ms | ≤2 | ||
| 19 | Average Opening Speed | m/s | 0.9 - 1.2 | ||
| 20 | Average Closing Speed | m/s | 0.5 - 0.8 | ||
| 21 | Opening Time - Max Operating Voltage | s | ≤0.05 | ||
| Opening Time - Min Operating Voltage | s | ≤0.08 | |||
| 22 | Closing Time | s | 0.1 | ||
| 23 | Resistance of Each Main Circuit | μΩ | 630 ≤ 50（1250 ≤ 45） | ||
| 24 | Allowable Cumulative Wear Thickness of Moving Contact | mm | 3 | ||
6. Outline & Installation Dimensions
The outline and installation dimensions of the product are shown in the figure below (the numbers in the brackets are the dimensions with 275mm phase distance):
7. Ordering Notes
When placing an order for the ZN63(VS1)-12 indoor high-voltage vacuum circuit breaker, please provide the following information to ensure that the product meets the actual use requirements:
- Exact product model (including rated current, rated short-circuit breaking current, operating mechanism type);
- Installation type (fixed type/withdrawable type) and matching switchgear model;
- Special environmental requirements (such as altitude, temperature, earthquake intensity, etc.);
- Special technical requirements (if any, such as customized voltage, additional accessories, etc.).
