The development of permanent magnet vacuum circuit breakers
The development of permanent magnet vacuum circuit breakers has undergone a complete process from technology introduction to independent innovation. Permanent Magnet Operating Mechanism: The core component, composed of a high-performance permanent magnet (generating a constant magnetic field), opening and closing coils, a moving iron core, and a magnetically conductive frame. The structure is extremely simple, with the number of parts typically only one-third that of a spring mechanism.
Intelligent Control Unit: Receives remote control or protection signals, precisely controls capacitor discharge, and provides pulse current to the closing and tripping coils.
Energy Storage Capacitor: Serves as an operating energy source; normally charged by the power supply, it discharges instantaneously during operation.
Vacuum Interruptor: Responsible for interrupting current; it is the arc-extinguishing component, and the technology is very mature.
Main Application Areas
Permanent magnet vacuum circuit breakers, due to their superior performance, have been widely used in multiple fields:
Power Systems: As a key piece of equipment in the construction of distribution network automation, they are used for protection and control in substations, power plants, and urban and rural distribution networks, especially suitable for locations with frequent operation.
1.Industrial Sector: In heavy industries such as chemical, steel, coal, and electric furnaces, they are used for equipment power switching and motor control to ensure the stability and safety of the production process.
2.Mining and Offshore Platforms: Harsh environments and difficult maintenance make the maintenance-free characteristic extremely valuable.
3.Frequent Operations: Such as metallurgical and chemical industries that require frequent load switching or capacitor switching.
Core Technical Features:
Structural Advantages: The permanent magnet mechanism adopts a bistable structure, reducing moving parts by more than 80% compared to spring mechanisms. It requires only one main moving part, eliminating the need for mechanical tripping and locking devices, significantly reducing the sources of failure. The number of mechanism parts is approximately 50, far fewer than traditional mechanisms.
High Level of Intelligence: Equipped with an intelligent controller, featuring detection, control, protection, and remote monitoring
functions. It can achieve intelligent operations such as automatic reclosing, fault location, and fault isolation, and supports GPRS wireless communication.
Energy Saving and Environmental Protection: Low operating energy consumption, with single operation energy consumption below 30J, starting current ≤5A, and charging current ≤50mA. Employs vacuum arc extinguishing technology, resulting in no combustion, no pollution, and low noise.
Summary
Permanent magnet vacuum circuit breakers have become the mainstream product in the field of medium-voltage switchgear, and their application prospects are even broader under the background of smart grid construction and the "dual carbon" strategy.
ZND-12 Permanent Magnetic Operating Mechanism Vacuum Circuit Breaker
ZND-12 Permanent Magnetic Operating Mechanism Vacuum Circuit Breaker is used for rated voltage of 12kV and AC 50/60Hz. It adopts a permanent magnet operating mechanism, with a compact design. It can be used to switch various types of electrical loads and is widely applied in power grid construction and product modification projects for urban and rural power grids, especially in locations requiring frequent operations.
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Shaanxi West Power Tongzhong Electrical Co., Ltd.
Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading manufacturer with over 20 years of experience, specializing in high quality 7 to 40.5kV vacuum circuit breakers, switchgears, and a wide range of electrical products.
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Ms.Grace Liu (Sales manager )
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whatsapp:86-18091765882
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No. 1 East Gaoxin Avenue in the High-Tech Development Zone of Baoji City, Shaanxi Province
