Insulator with disc-shaped carrier element

1. An insulator for positioning an electrical conductor in a gas chamber in a housing of a gas-insulated switchgear assembly, comprising:

an electrically insulating carrier element having a disc-shaped portion with first and second opposing sides and at least one through-hole for passing through an electrical conductor, wherein the carrier element includes,

at least one notch for accommodating a clamp element is arranged on an outer circumference of the carrier element at least one point, and

a groove for accommodating a sealing ring, formed in at least one of the first and second sides closer to the outer circumference than the at least one through-hole,

wherein an electrically conductive contact element for connecting a phase conductor is inserted into the through-hole, the contact element protruding beyond at least one side of the carrier element, the contact element having at least one of a plug-type contact and screw-type contact, and an axial inner bore for gas exchange.

2. The insulator according to claim 1 , wherein the carrier element has three through-holes for passing through in each case one electrical conductor.

3. A housing unit for a gas-insulated switchgear assembly, comprising a housing, which surrounds a gas chamber and has at least one opening for passing through at least one electrical conductor, wherein an insulator according to claim 1 is provided, the insulator being fastened to the housing by at least one clamp element, the clamp element being inserted into the notch of the insulator and being fastened to the housing.