Primary and secondary deep-melting circuit breakers: efficient and intelligent outdoor power distribution equipment
Publish Time: 2025-02-12
Circuit breakers play a vital role in the safe and stable operation of power systems. As outdoor power distribution equipment with a rated voltage of 12kV and three-phase AC 50Hz, the continuous optimization of the performance and functions of primary and secondary deep-melting vacuum circuit breakers (hereinafter referred to as "circuit breakers") provides a strong guarantee for the reliable operation of power systems. This article will explore in depth the characteristics, applications and important contributions of primary and secondary deep-melting circuit breakers to power systems.1. Definition and characteristics of circuit breakersPrimary and secondary deep-melting vacuum circuit breakers are outdoor power distribution equipment that integrates measurement, metering, protection, and self-powered power supply. They are mainly used to break and close load currents, overload currents and short-circuit currents in power systems, and have significant characteristics such as low power consumption, high accuracy, and high intelligence.Low power consumption: The circuit breaker adopts advanced vacuum arc extinguishing technology, which greatly reduces the power consumption generated when breaking the current and improves the energy efficiency of the power system.High accuracy: Built-in high-precision current sensors and voltage sensors can measure the current and voltage signals in the power system in real time and accurately, providing reliable data support for the protection and control of the power system.High degree of intelligence: The circuit breaker not only has basic opening and closing functions, but also integrates multiple intelligent functions such as measurement, metering, and protection. Through the built-in control unit and communication module, remote monitoring and control can be achieved, which greatly improves the automation level of the power system.2. Structure and principle of circuit breakerThe circuit breaker has a compact structure and is mainly composed of a vacuum circuit breaker body, a feeder terminal, a power supply voltage transformer, a sealed pole, a connecting cable, etc. Among them, the sealed pole is a pole formed by embedding the vacuum arc chamber and the conductive parts related to the circuit breaker into a solid insulating material at the same time, which has excellent insulation performance and mechanical strength.The working principle of the circuit breaker is mainly to use the effect of current and heat. When the circuit is operating normally, the fuse inside the circuit breaker is in a closed state; when the circuit has abnormal conditions such as current overload or short circuit, the internal fuse will be heated and melted, thereby cutting off the circuit to protect the safe operation of the power system.3. Application and advantages of circuit breakersPrimary and secondary deep-melting vacuum circuit breakers have a wide range of applications and significant advantages in power systems.Application areas:Distribution network: In the distribution network, circuit breakers can be used to control and protect various electrical equipment and improve the stability and reliability of the power system.Transmission network: In the transmission network, circuit breakers can be used to cut off or connect the current on the high-voltage line to ensure the safe operation of the power system.Power system automation: In the power system automation, circuit breakers can realize remote control and automatic operation, and improve the automation level of the power system.Advantages:Safe and reliable: The circuit breaker adopts advanced vacuum arc extinguishing technology and solid-sealed pole structure, has excellent insulation performance and mechanical strength, and can ensure the safe operation of the power system.High degree of intelligence: The circuit breaker integrates multiple intelligent functions such as measurement, metering, and protection, which can realize remote monitoring and control, and improve the automation level of the power system.Easy maintenance: The circuit breaker has a reasonable structural design, which is easy to maintain and repair, and reduces the operation and maintenance costs.4. Future development trend of circuit breakersWith the continuous development of science and technology, primary and secondary deep melting vacuum circuit breakers will show the following development trends:Higher level of intelligence: Future circuit breakers will have more powerful data processing and analysis capabilities, and can achieve more complex protection and control strategies.Better environmental performance: The use of more environmentally friendly materials and manufacturing processes can reduce the energy consumption and emissions of circuit breakers, which meets the requirements of sustainable development.Higher reliability and durability: By optimizing the structural design and using more advanced materials, the reliability and durability of the circuit breaker can be improved, and its service life can be extended.5. ConclusionAs an important part of the power system, the continuous optimization of the performance and functions of primary and secondary deep melting vacuum circuit breakers provides a strong guarantee for the reliable operation of the power system. In the future, with the continuous development of science and technology, circuit breakers will show a higher level of intelligence, better environmental protection performance, higher reliability and durability, and make greater contributions to the safe and stable operation of power systems.
