Information about the classification and selection of circuit breakers, the types of circuit breakers suitable for cutting off high voltage and low current scenarios and the key points for selection are as follows:
1. Applicable circuit breaker types
High-voltage circuit breaker (QF)
Core advantage: It has a reliable arc extinguishing device and can safely cut off the load current and short-circuit current under high voltage (such as 1500V), which is the first choice for high voltage scenarios.
2. Select key parameters
Arc extinguishing capacity
In high voltage scenarios, circuit breakers with strong arc extinguishing devices (such as vacuum or sulfur hexafluoride circuit breakers) must be selected.
3. Special scenario supplement
Load switch + fuse combination: used in power distribution system, economical but with poor protection selectivity.
Current characteristics: low inductive/capacitive current requires strong arc extinguishing ability (such as vacuum/SF6).
Environmental protection requirements: vacuum circuit breakers can be selected when there is no SF6 demand.
Cost and maintenance: vacuum circuit breakers have high overall cost performance.
Among the finalized products,The company's core vacuum circuit breaker products can achieve 20 years of maintenance-free,reaching the world's advanced level .The product has the characteristics of few parts,simple structure,high reliability,maintenance-free ,low power consumption ,long life and so on .Long-term stable work in harsh environments.
1. Products Description
LTZ-40.5 indoor SF6 circuit breaker by Shaanxi West Power Tongzhong Electrical Co., Ltd. is an indoor device used in AC 50Hz three-phase power system. It can be used in industrial and mining enterprises, power plants and substations for the control and protection of electrical equipment, and can be used in places where frequent operation is required, and can be used as a liaison circuit breaker and suitable for capacitor bank circuit breaker, and is a more ideal oil-free circuit breaker in the power system.
2. Use Of Environmental Conditions
A. Altitude: not more than 1000m;
B.Ambient temperature: -15℃～40℃;
C.Relative air humidity: daily average not more than 95%, monthly average humidity not more than 90%;
D.Environmental conditions: no fire, explosion hazard, serious filth, chemical corrosion and severe vibration occasions;
Note: beyond the above requirements, can be negotiated by the user and the manufacturer.
3.Main Features Of The Product
A. Strong breaking capacity: SF6 circuit breaker completes arc blowing by blowing out SF6 gas, its arc blowing speed is fast, arc burning time is short, and the breaking current is large, which can effectively protect the safety of medium and high voltage circuits. SF6 circuit breaker after disconnecting capacitive or inductive current, there is no danger of re-ignition and re-ignition.
B. Long electrical life: SF6 circuit breaker has a long service life, long overhaul cycle, and can adapt to frequent operation within a short period of time, with good safety and durability.
C. High insulation level: SF6 circuit breaker is using sulphur hexafluoride gas as insulation medium, the insulation level of this gas is extremely high.
D. Modular operation mechanism: SF6 circuit breaker adopts the modular spring operation mechanism which is independently developed by our company and adapted to the market popularity, which has good mechanical performance and convenient and quick maintenance in the later stage.
Shaanxi West Power Tongzhong Electrical Co., Ltd.
Contact: Ms.Grace Liu (Director of Sales Department)
Tel: +86 917 3661109 Fax: +86 917 6739416
Mobile: +86 18091765882(WhatsApp/Wechat/skype )
Website:https://www.xdtzelectrical.com
