Product Intro: I. Product Overview ZW7-40.5 outdoor vacuum circuit breaker low-voltage three-phase exchange 50Hz, additional voltage 40.5kv and below the outdoor low-voltage switchgear equipment. Can be used as points, co-load current, overload current and short circuit current purposes. Thailand opened Electric Equipment Co., Ltd. Shaanxi professional consumer ZW7-40.5 / 630A, ZW7-40.5 / 1250A, ZW7-40.5 / 1600-31.5, ZW7-40.5 / 2000-31.5 stainless steel housing, including mounting brackets, built LZZBJ4-40.5 current transformer , external LZZW-40.5 Current transformers, outdoor ceramic column, outdoor vacuum circuit breaker casing. Two, ZW7-40.5 use environment 1, the normal use conditions a) ambient air temperature is the lowest temperature of + 40 ℃ minimum temperature of -30 ℃ b) no more than 3000 meters above sea level c) wind pressure does not exceed 700Pa (equivalent to wind speed 34m / s) d ) earthquake intensity does not exceed 8 e) the level of air contamination level Ⅲ 2, especially when the task conditions apply in special task environment, it can make corresponding design upon request special task environment. Third, the product features 1, ZW7-40.5 this product in my factory original product is substantially improved products, which corresponds to the relevant norms of the country, the industry, and has been through the entire type of experiment. 2, ZW7-40.5 peculiar product design, small size, light weight, high strength, shape decency stingy. 3, ZW7-40.5 breaker galvanized chassis taken to solve the housing adopt stainless steel, rust-proof aluminum internal components taken together, have a strong anti-corrosion and antioxidant capacity. 4, ZW7-40.5 breaker gearbox is waterproof box, in order to avoid internal electrical control components from moisture, transmission box with a heating installation. 5, the vacuum interrupter is an important component of the circuit breaker, in order to better adapt to the needs of outdoor products, we designed a special vacuum interrupter of this product, and it has reliable performance, the use of long-life, breaking to large characteristics . 6, ZW7-40.5 products with LZZBJ4-35 current, each transformer can be equipped with up to four separate coils, coil number, ratio, accuracy can be manufactured according to user requests, it must be in accordance with the transformation ratio 100/5 ~ within 1600/5 scale selection, measurement accuracy can reach 0.2 and 0.2S class, four coil turns ratio, the accuracy can be different. Fourth, the working principle 1, ZW7-40.5 conductive circuit schematic: a current through the outlet terminals lead to the vacuum interrupter stationary end and a movable end, leads from the outlet terminals through soft Cohesion and current transformers. 2, ZW7-40.5 initiatives principle: the circuit breaker for the system of control is through the "minute", "close" operation to achieve. A circuit breaker is operated by the actuator, institutions and the opening spring drive rod, insulation rod height stationary pivoting drive crank arm, so that the guide rod height stationary vacuum interrupter to achieve dynamic and static contact Head of points, co stationary.