How to distinguish a vacuum contactor from a vacuum circuit breaker?
The vacuum contactor itself uses a vacuum arc extinguishing chamber to extinguish the arc, so their application itself is very wide. The main function is to connect or disconnect the normal working current. In this case, it can also remotely connect and disconnect all AC motors or start and stop them frequently at low voltage, which is of vital importance to them.
A circuit breaker is generally used for infrequent load switching operations and is equipped with overload and short-circuit protection.
Similarly, vacuum contactors can also play an insulating or other role, such as better isolating the TV frame and the metal base, and better isolating the electromagnetic system and auxiliary switches. In the actual contact process, the bellows shells containing various remaining metal covers are all made of corrugated ceramic tubes, which are made of ceramic materials. The biggest feature of vacuum contactors is that they have relatively high mechanical strength, very large creepage distance, and very strong heat and impact resistance.
Differences between vacuum circuit breakers and vacuum contactors:
1. Vacuum circuit breakers enhances the adaptability to the environment. At the same time, due to the good vacuum insulation and arc extinguishing performance, they have been widely used.
2. Vacuum circuit breaker: a protective device that can automatically disconnect and protect the line when a line fails; it can also manually disconnect and cut off the load current.
3. Vacuum contactor: a repeatedly operated device that can cut off the load current but cannot break the short-circuit current. And it does not have the protection function of short-circuit current, and it can only be separated and maintained by a given signal.
4. Vacuum circuit breakers are large in size and modular in design, suitable for high-voltage environments; vacuum contactors are compact and lightweight, suitable for installation in small spaces.
5.Vacuum contactors: Suitable for low voltage (such as industrial automation, motor control) and medium voltage circuits, used to control the on and off of circuits. - Vacuum circuit breakers: Mainly used in medium and high voltage (such as substations, power plants) and ultra-high voltage power systems to protect lines from faults.
VTZ-40.5K vacuum circuit breaker by Shaanxi West Power Tongzhong Electrical Co., Ltd. is a 40.5kV vacuum circuit breaker from our company's VTZ modular mechanism series, which has been extensively optimized and improved in mechanical transmission, main structure, and secondary circuits. It is a fixed installation of indoor switchgear component for rated voltage 40.5kV, AC 50HZ.
VTZ-40.5K vacuum circuit breaker has many advantages:
1.Breaker Performance
E2-C2-M2
2.Convenient maintenance
The modular mechanism design allows for easy replacement of the closing and opening coils without the need for disassembling other components. This eliminates the need for testing or adjustment after replacement, ensuring users can replace them independently, making subsequent maintenance more convenient.
3.High Conductivity
The optimized insulated cylinder structure and high performance flexible connection embedded pole reduce contact resistance, ensuring reliable power supply.
4.Strong adaptability
This series of switches can be equipped with opening interlocks and main shaft interlocks, and can be designed with interlocks according to user requirements. Special chassis truck can also be designed and modified according to user cabinet needs for convenience.
5.Wide range of use
The product is designed to withstand harsh environments, including temperatures as low as -25°C, and meets the requirements for operation at altitudes of up to 2000 meters.
