FN7-12D 12KV LBS indoor Medium voltage load break switch with earthing switch
ABB NAL series 12KV LBS medium voltage load break switch for RMU similar as
12KV MV Outdoor Off-Load overhead line isolator disconnector LBS load break switch
As a protection and control unit for power grid equipment and industrial and mining enterprise power design
Mainly used for opening closing the power system load current, overload current and short - circuit current
12KV MV VCB outdoor high voltage vacuum circuit breaker with controller
What is a vacuum circuit breaker?
A vacuum circuit breaker is a circuit breaker quenching arc in a vacuum medium. The on-off, on-off, and associated arc breaking operations with current contacts are carried out in the vacuum chamber of the circuit breaker, known as the vacuum circuit breaker.
Vacuum as arc extinguishing medium in circuit breaker is called vacuum circuit breaker because the vacuum has superior arc extinguishing performance so that it has high insulation strength. This applies to most standard voltage applications, as for higher voltages, vacuum techniques are developed but are not commercially viable.
the circuit breaker and the isolating switch can be combined to form a "combined circuit breaker"
Vacuum circuit breaker is the most commonly used type of high-voltage circuit breaker, mainly divided into two types: indoor type and outdoor type. We mainly focus on indoor 10-40KV vacuum circuit breakers.
VS1-40.5 VCB indoor high voltage vacuum circuit breaker is used in KYN61-40.5 switchgear. Mainly used in rated voltage 40.5kV, three-phase AC 50Hz power system
Rated current from 630A to 4000A and rated short circuit breaking current from 20kA to 50kA satisfies re quirements of various customers.
LW3-12/630-20 primary and secondary fusion sulfur six new circuit switch is a new generation product developed by our company in response to the new requirements of the State Grid's primary and secondary synthetic sleeve switches for network access.
LW8A-40.5 outdoor porcelain column high-voltage sulfur hexafluoride circuit breaker is suitable for power systems with AC 50Hz and rated voltage 40.5kV.
This product can be equipped with CT14 spring mechanism.
The circuit breaker is an outdoor small porcelain column structure, equipped with a CT14 spring operating mechanism
LW16-40.5 side-mounted and center-mounted types are used for outdoor devices in AC 50Hz three-phase power systems.
LW24-40.5(G)/T2500(3150)-31.5 type six-oxide circuit breaker is an outdoor three-phase AC 50HZ high-voltage power transmission and transformation equipment.
The working principle of the vacuum circuit breaker is that once the circuit breaker contact is disconnected in a vacuum, the contact is ionized by the metal vapor in the contact and produces an arc. However, due to the rapid condensation of electrons, ions, and metal vapors generated in CB contact outside the arc, the arc is easily quenched, so dielectric strength can be quickly restored. The most important feature of a vacuum is that once an arc is created in a vacuum, it can be extinguished quickly due to the rapid increase in the dielectric strength of the vacuum.
Characteristics of vacuum circuit breaker
Compared with other types of circuit breakers, the insulation medium of vacuum circuit breakers has higher requirements on arc suppression performance. The pressure in the vacuum blocker is about 10-4 for the flood, which includes very few molecules in the blocker. This circuit breaker basically has the following two characteristics.
Compared with other insulating media used in circuit breakers, the circuit breaker is a superior insulating medium. It is superior to other media except for SF6 and air because these media are used at high pressure.
Application of vacuum circuit breaker
A vacuum circuit breaker is currently recognized as the most reliable medium voltage switching current interruption technology. It requires minimal maintenance compared to other circuit breaker technologies.
The technology is mainly suitable for medium voltage applications. For high-pressure vacuum technology has been developed, but it is not commercially feasible. The vacuum circuit breaker is suitable for both metal-clad switchgear and ceramic clad circuit breaker.
Supplier of vacuum circuit breaker
Zhejiang JGGY Electrical Co.,Ltd (jggyelectric.com), JGGY Electrical was established in 2007, specializing in the manufacture, sales and service of high-voltage electrical products. We mainly specializes for 6~42kV medium voltage electric (outdoor and indoor): load break switch, Disconnector, cutout fuse, Surge Arrester, vacuum circuit Breaker. Over the years, JGGY have been successfully used in important fields such as electric power, communications, chemicals, mining, metallurgy, transportation, petroleum, and railways.
Get a quote on the latest price of vacuum circuit Breaker, load break switch, Disconnector, cutout fuse, Surge Arrester from JGGY. We will reply within 24 hours.
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