LW59-252/T4000-50 outdoor high voltage A.C SF6 porcelain pole circuit breaker is a new product independently developed by our company in order to meet these requirements of users for the circuit breaker: high reliability, miniaturization, convenient operation and maintenance. It mainly consists of interrupter, interrupter porcelain bushing, post porcelain bushing, supporting frame and operating mechanism etc. It has the advantages of simple and compact structure, excellent breaking fault current capacity and small impact force etc.
The product is widely used in these fields of A.C. 50Hz，110kV power system such as substations, power plants, petrol-chemical, steel and coal, railway industries and urban power supply, to open and close load current, and to break fault current, so as to achieve control and protection of power system and electrical equipment. It is the important switchgear needed for high voltage connected to cities, power transmission to the enterprises(petrol-chemical and metallurgy ) with high power consumption and feeder to medium, low voltage power grids
The product adopts single pole single break structure, it can be equipped with a spring operating mechanism or a hydraulic spring charged operating mechanism. The circuit breaker body is directly installed on the mechanism box. It can be operated in group or three phase linkage operated. The circuit breaker is self-energy arc-extinguishing, using SF6 as the insulation and arc-extinguishing medium, and there is no parallel capacitor at the interrupter break.
The product meets the requirements in these standards GB1984 “A.C. High voltage circuit breaker”, GB/T11022 "common specifications for high voltage switchgear and controlgear standards”, JB/T9694” Common specifications for SF6 circuit breaker” , DL/T402” Ordering specification for high voltage A.C circuit breaker” and DL/T593” common specifications for high voltage switchgear and controlgear standards”.
(1) Simple structure and small land area.
(2) Easy installation and commissioning, and small workload in operation and maintenance.
(3) The operating mechanism equipped is stable and reliable in operation, with a small noise, and high charging efficiency.
(4) Due to the self-energy arc-extinguishing structure adopted, the breaking performance is more stable.
(5) Small operating power and high reliability.
Main technical data：
rated short circuit breaking current
rated short time withstand current
rated duration of short time withstand current
rated short circuit making current
rated peak withstand current
rated peak withstand current
electrical life at rated short circuit breaking current
rated SF6 gas pressure (gauge pressure at 20℃)
rated short time power frequency withstand voltage
rated lightning impulse withstand voltage
I min, power frequency withstand voltage on auxiliary circuit
operating mechanism equipped
spring operating mechanism or hydraulic spring operating mechanism