Description
indoor permanent magnet solid-sealed high-voltage vacuum circuit breaker is an indoor switchgear of a three-phase AC 50Hz rated voltage of 12KV power system, used as power grid equipment, industrial and mining enterprises
Protection and control unit for industrial power equipment. It is suitable for places requiring frequent operation under rated working current, or multiple interruption of short-circuit current.
The circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or equipped with a dedicated propulsion mechanism to form a handcart unit.
Use environmental conditions
This type of product is equipped with a bistable permanent surface mechanism. The mechanism is equipped with permanent magnets. The permanent magnets provide the holding force to maintain the switch in the closed and open state. Compared with the conventional spring operating mechanism, the number of mechanical parts is greatly reduced. The mechanical transmission chain is shortened, so that the reliability of the switch is greatly improved, and the mechanical life is greatly increased.
Vacuum circuit breaker is a widely used high-voltage electrical equipment in the power system. Here are some key information about vacuum circuit breakers:
working principle
The working principle of a vacuum circuit breaker is to use vacuum as the arc extinguishing medium. When the switch is opened, an arc is generated between the moving and stationary contacts. Due to the insulation characteristics of vacuum, the arc quickly extinguishes, allowing the distance between the moving and stationary contacts to decrease
The contacts of a vacuum circuit breaker are designed with a special shape, which generates a magnetic field when current flows through, causing the arc to quickly move along the tangent direction of the contacts. Some metal vapor will condense on the cylinder, and when the arc naturally crosses zero, it will be extinguished, and the dielectric strength between the contacts will quickly recover
.
technical parameter
Rated voltage: The rated voltage of a vacuum circuit breaker is usually 10kV, and the highest voltage can reach 11.5kV
.
Current parameters: including rated short-time (4s) withstand current and rated short-circuit closing current (peak), which vary depending on different models of circuit breakers
.
Mechanical characteristics: including contact opening distance, contact overtravel, closing speed, opening speed, etc
.
Withstand voltage: including rated lightning impulse withstand voltage (full wave) and rated short-time power frequency withstand voltage (1min)
.
Application scenarios
Vacuum circuit breakers are widely used in power systems, industrial production, transportation, metallurgy, mining, construction and other industries. Their high reliability, easy operation, and long lifespan make them indispensable key equipment in these fields
.
characteristic
High reliability: Vacuum circuit breakers use vacuum as the arc extinguishing medium, which can more thoroughly extinguish the arc and ensure that the arc will not occur again, thereby improving the reliability of the system.
Long lifespan: Vacuum circuit breakers have a longer service life because they do not contain solid, liquid, or gas media and are not affected by media aging.
Environmental protection and energy conservation: Vacuum circuit breakers do not use toxic gases and will not cause pollution to the environment. In addition, vacuum circuit breakers have good arc extinguishing effect, low electrical energy loss, and can effectively reduce the energy consumption of the system.
Low maintenance cost: Vacuum circuit breakers have lower maintenance costs due to their simple structure and no need for regular maintenance
.
The above information provides a basic overview, working principle, technical parameters, application scenarios, and characteristics of vacuum circuit breakers, hoping to be helpful to you.
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