The DR type disconnectors consist of 3 centre break poles. Each pole contains a frame, two rotating post insulators and two main contacts that move in the horizontal plane.
The disconnectors can be supplied as either manual or motor actuated and with one or two earthing switches. One of the earthing switches can also be motor driven, thus EMEK disconnectors are suitable for use in unmanned substations.
The post insulators are mounted on rotating bearings, which are mounted on the U beam frame.
Auxiliary contacts are procured from well known manufacturers who have specialized and are experienced in this type or switches.
Under fault conditions contact pressure increases, providing excellent short-time current withstand capability.