Section insulating device and use of same

A section disconnect device for a contact line assigned to railborne vehicles as overhead line and carrying high voltage, comprising:

• a line section arrangement (10) with multi-section extending, said line section arrangement being configured to be tensioned between two contact-wire connecting heads (12, 14) and provided with insulator means (36, 38),
• said line section arrangement being constructed being mountable by means of respective accommodating sections (66) of the contact-wire connecting heads in an electrically and mechanically contacting manner between free ends (16, 18) of the contact line,
• wherein, at least one of the contact-wire connecting heads (12, 14) has adjustable level equalization means (66, 68, 70) for interacting with a head-side end (20, 24) of the line section arrangement (10), which are constructed in such a manner that, with respect to a current-collector-contact side of the contact line and/or a current-collector-contact plane, the free end of the contact line is configured to be brought into a common plane with the end of the line section arrangement and/or seamlessly aligned with the same, wherein the end of the line section arrangement is constructed as a continuous, diverted line section (20, 24), which is guided around a roller (66) or a circular section and/or ring section of the level equalization means for forming a spread, and
• wherein the roller or the circular section or ring section is configured to be adjusted along an adjustment axle.