1.Summary ZCW-40.5 Outdoor high-voltage vacuum automatic recloser (hereafter referred to as recloser): this is a new-type recloser combined by the vacuum circuit breaker and the recloser controller. The computer-based protecting functions of quick-disconnection, time delay quick-disconnection, and over-current protection. Flexible value setting, time delay setting make the users can set up definite value and delay time, and automatic reserve protecting value switching function, the recloser controller has the maximum of 3 times to reset the controller, and choose the reclosing times and intervals freely. This product integrates a variety of functions such as measurement, control, monitoring, communication and remote operation, featuring a high level of integration, flexible configuration and friendly HMI. Applicable to simple or sophisticated distribution lines, it not only helps realize the basic functions of automatic distribution power network without background, but also can be used as the terminal of the distribution power network with background, a basic hardware device in the power system automation for ensuring high stability and reliability of the power system. 2.Service Environment ?he height above sea level is not greater than 2000m; ?he ambient temperature upper limit is +70, lower limit -45; the wind pressure does not exceed 700Pa(wind speed 34m/s) ; ?here is no regular violent vibrations; ?irtiness class: 3 class; Note: If there are special service conditions, please declare that special-purpose under consulting.