Power load-break switch FZW28-12F

short-circuitdistributionoutdoor

On the 12kV feeding line, when the error happened at one tributary line of the T type link users, normally it will cause the main line or adjacent users power cut accident, the investing make known this kind of accident takes 20%-30% or higher percentage in all power distribution accident, the result is enlarged power cutting scope and cause responsibility disputation. Mounted a user boundary load break switch (also name watchdog) at the above T-type connecting point is the ideal solution to the above accident. 2.Main function characteristic Automatically cut single phase earthing fault: when users tributary line cause single phase earthing fault, the boundary switch will open automatically, other distribution line users of the substation and feeding line will be without influence; isolation interphase short circuit fault automatically. When the tributary line cause interphase short-circuit fault, boundary switch will open at once after out-wire protection tripping. After the substation reclose, fault line is isolated passively,other distribution users in feeding line resume power supply rapidly (equal to a transient fault). Quick localization of fault: the tributary line fault cause boundary switch protection action, only the accident user cause power cut and by itself report the fault information, the power company could dispatch worker to life investigation;if the boundary switch match with communication module, it could transmit message to electricity management center.