Description
Description of ZN28(A)-12 Series Indoor High-voltage Vacuum Circuit Breaker
The ZN28(A)-12 Series Indoor High-voltage Vacuum Circuit Breaker is a professional indoor high-voltage switching device specifically developed for three-phase AC 50Hz power systems, with a rated voltage of 12KV. As a core component in indoor power distribution systems, it is designed to meet the strict requirements of fixed switchgear applications, integrating reliable switching performance and flexible installation options to adapt to diverse indoor power distribution scenarios.
Compliant with the GB1984-89 standard, this series adheres to national technical specifications for high-voltage circuit breakers, ensuring stable performance and safe operation in long-term service. It features two distinct installation structures to cater to different switchgear configurations, making it highly versatile for various indoor power distribution projects.
The basic model ZN28-12 adopts an integrated structure, where the switch body and operating mechanism are installed as one unit for simplified installation and maintenance. The ZN28A-12, on the other hand, uses a split-type structure with the switch body and operating mechanism installed separately, offering greater flexibility for integration into different fixed switchgear types.
Equipped with optional operating mechanisms to match diverse operational needs, this series provides reliable control and protection for indoor high-voltage circuits, playing a crucial role in ensuring the safety and stability of power distribution systems in industrial and commercial settings.
Parameter of ZN28(A)-12 Series Indoor High-voltage Vacuum Circuit Breaker
| name | unit | parameter | |||
| rated voltage | kV | 12 | |||
| rated current | A | 63,010,001,250 | 12,501,600 | 1250,1600,2000,2500 | 160,025,003,150 |
| rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 |
| rated short-circuit closing current | kA | 50 | 63 | 80 | 100 |
| rated dynamic steady current (peak) | kA | 50 | 63 | 80 | 100 |
| rated thermal stability current (effective value) | kA | 20 | 25 | 31.5 | 40 |
| rated thermal stability time | S | 4 | |||
| rated short-circuit breaking current, breaking times | Time | 30(50) | |||
| CDIO Electromagnetic Actuator with Full Open Time | mS | <80 | |||
| rated operating sequence | 0.3 | ||||
| One-minute power frequency withstand voltage (effective value) | kV | Interbedded with 42, fracture 48 | |||
| lightning impulse withstand voltage | kV | 75 for the interfacial landform, 85 for the fracture | |||
| mechanical life | Time | 10000 | |||
Feature of ZN28(A)-12 Series Indoor High-voltage Vacuum Circuit Breaker
- Flexible Structural Design: Available in two installation structures (integrated and split type), the series can be customized according to switchgear layout and space requirements. The integrated ZN28-12 simplifies installation and maintenance, while the split ZN28A-12 offers greater adaptability to special fixed switchgear types.
- Diversified Operating Mechanism Options: Compatible with DC electromagnetic operating mechanisms (CD17, CD10) and spring energy storage operating mechanisms (CT17, CT19), meeting different operational needs of power distribution systems and ensuring reliable switching performance.
- Compliant with National Standards: Strictly manufactured in accordance with the GB1984-89 standard, the product features stable performance, high safety, and strong compatibility, fully meeting the operational requirements of indoor high-voltage power distribution systems.
- Wide Switchgear Compatibility: Specifically designed to adapt to various fixed switchgears such as GG1A(Z) and XGN2A10(Z), making it a versatile choice for different indoor power distribution projects and reducing the need for customized modifications.
- Reliable Indoor Performance: Optimized for indoor high-voltage environments, the circuit breaker has excellent insulation performance and stable operation, effectively resisting environmental factors such as humidity and dust, ensuring long-term reliable service.
- Easy Installation and Maintenance: The integrated structure allows for one-time installation, while the split structure facilitates separate maintenance of the switch body and operating mechanism, reducing maintenance time and operational costs.
