Multiple stress control device for cable accessories and methods and systems including same

A method for installing a cover sleeve on an electrical cable, the method comprising the operations of:

• providing:
• a unitary cold shrinkable, tubular, elastomeric cover sleeve defining a cover sleeve through passage that is configured to receive the electrical cable, the cover comprising:
• a first type of stress control element;
• a second type of stress control element that is different from the first type of stress control element;
• and
• an outer insulating layer radially disposed around the second type of stress control element;
• wherein the outer insulating layer, the first type of stress control element, and the second type of stress control element are integrally formed to form a unitary structure;
• and
• a holdout that maintains the cover sleeve in an expanded state in which the cover sleeve is elastically expanded and when removed, permits that cover sleeve to radially contract to a contracted state about the electrical cable;
• positioning the holdout and the cover sleeve around the electrical cable;
• and
• removing the holdout from the cover sleeve to cause the cover sleeve to radially contract on the electrical cable.

A cover system for termination of an electrical cable, the cover system comprising:

• a unitary cold shrinkable, tubular, elastomeric cover sleeve defining a cover sleeve through passage that is configured to receive the electrical cable, the cover sleeve comprising:
• a first type of stress control element;
• a second type of stress control element that is different from the first type of stress control element;
• and
• an outer insulating layer radially disposed around the second type of stress control element;
• wherein the outer insulating layer, the first type of stress control element, and the second type of stress control element are integrally formed to form a unitary structure;
• a holdout that maintains the cover sleeve in an expanded state in which the cover sleeve is elastically expanded and when removed, permits the cover sleeve to radially contract to a contracted state about the electrical cable;
• wherein the first type of stress control element comprises a geometric stress cone that includes an electrically conductive and/or a semiconductive portion that is configured to conductively engage a semiconductor layer of the electrical cable, and
• wherein the second type of stress control element comprises a high dielectric constant stress relief element.

A cover unit device for termination of an electrical cable, the device comprising:

• a unitary cold shrinkable, tubular, elastomeric cover sleeve defining a cover sleeve through passage that is configured to receive the electrical cable, the cover sleeve comprising:
• a first type of stress control element;
• and
• a second type of stress control element that is different from the first type of stress control element and that is radially disposed around the first type of stress control element;
• wherein:
• the first type of stress control element comprises a high K layer;
• the second type of stress control element comprises a geometrical stress relief element;
• the high K layer is disposed radially within the geometrical stress relief element between the geometric stress relief element;
• and
• the high k layer is configured to be interposed between the geometrical stress relief element and a semiconductor layer of the electrical cable and conductively engage the semiconductor layer of the electrical cable.