GIS post insulator with an integrated barrier

The post insulator (4) as claimed in one of the preceding claims, characterized in that

• a) in each case at least one indentation (4b) is arranged on a front surface (41) and on a rear surface (51) of the post insulator (4), and/or
• b) at least one indentation (4b), which is concave and open toward the component (2), and at least one indentation (4b), which is concave and open toward the holder (3), are provided, and/or
• c) the indentation (4b) is closed in an annular shape around the component (2).

The post insulator (4) as claimed in one of the preceding claims, characterized in that

• a) on its surface (41) in the area (4a), the post insulator (4) has a dielectric barrier (5) which has a projection (5a, 5b) with respect to the base body (40) of the post insulator (4), and has an extent (5c) transversely with respect to the bridging direction (7), and
• b) the indentation (4b) is formed between the base body (40) and the barrier (5) of the post insulator (4).

The post insulator (4) as claimed in one of the preceding claims, characterized in that

• a) the area (4a) for arrangement of the indentation (4b) and in particular of a barrier (5) between the component (2) and the holder (3) is chosen to be in an area where there are low E field strengths on the surface (41, 51) of the post insulator (4) during normal operation, and/or
• b) the indentation (4b), in particular an inner profile (5c) of the indentation (4b), has rounded contours in order to improve the E field control.

The post insulator (4) as claimed in one of the preceding claims, characterized in that

• a) the high voltage component (2) is an inner conductor (2) in a gas insulated switchgear assembly (1), and/or
• b) the holder (3) is encapsulation (3) or a further inner conductor in a gas insulated switchgear assembly (1), and/or
• c) the component (2) is at the same time designed as the holder (3), and the holder (3) is at the same time designed as the component (2).

The post insulator as claimed in one of the preceding claims, characterized in that

• a) the post insulator (4) is a partition insulator (4) or a gas permeable post insulator, and/or
• b) the post insulator (4) is designed for a gas insulated switchgear assembly (1), in particular for high-voltage levels above 123 kV.

A gas-insulated switchgear assembly (1) having a post insulator (4) as claimed in one of the preceding claims.

A module for a gas-insulated switchgear assembly (1) having a post insulator (4) as claimed in one of the preceding claims.