Patent ID: 8824109

Claim:
A disconnector for distribution transformers with dielectric liquid comprising current-limiting fuses located in the transformer tank which are electrically connected with an external phase power supply and through fixed contacts of the main contact and moving contacts of the main contact of the disconnector with the active part of the transformer comprising the primary circuit and the secondary circuit of the transformer, the current-limiting fuses being located in a common casing of the disconnector which houses a slide with a pilot, which slide is coupled with a fixing disc by means of springs, characterized in that the disconnector is furnished with an additional auxiliary contact being a kind of a limit switch controlled by a roll which is fixed to the fixing disc, and having a cam cooperating with the roll, which is fastened to the slide, said auxiliary contact is electrically connected with a switch connected to the active part of the transformer on the low voltage side of the transformer on the low voltage side of the transformer.