Medium-voltage disconnect switch FLa 15/97

single-pole3-polevacuum

Contrary to former outdoor switch-disconnectors in which it was common practice for the arc to be extinguished in oil, with the new developed outdoors witch-disconnector FLa 15/97 arc extinction takes place in a vacuum interrupter. Based on a patented insulating system there is alsono liquid or gaseous medium required for the external insulation strength of the vacuum interrupters. The vacuum quenching device is embedded in a weather-proof insulating housing. This switchgear is therefore also recommended for special applications (e.g. in water protection areas).The outdoor switch-disconnector is capable of switching on its rated current as well as its rated short-circuit making current via the main contact system. The disconnecting process is implemented via the shunt-connected vacuum interrupters, resulting in no external arcing phenomena. A fully developed eccentric make-and-break mechanism operates the vacuum interrupters and ensures Class M2 with regard to the mechanical strength(corresponds to 5000 mechanical operating cycles).The designs FLa 15/97 correspond in their main dimensions to the switches FLa 15/60, FLa 6400 andFLa 6410 (refer to brochure 762, 763), i.e. the fixing dimensions have remained unchanged.