An electrical isolator comprising: a first fluid-carrying member and a second fluid-carrying member spaced apart from said first fluid-carrying member; wherein said first fluid-carrying member has a first toothed surface and said second fluid-carrying member has a second toothed surface; wherein the electrical isolator further comprises: a fibre-reinforced polymer tube that overlaps both the first fluid-carrying member and the second fluid-carrying member and which contacts the first toothed surface in a first interface region of the fibre-reinforced polymer tube and which contacts the second toothed surface in a second interface region of the fibre-reinforced polymer tube; and a compression fitting arranged to bias the first interface region and the first toothed surface together.

An electrical isolator comprising: a first fluid-carrying member and a second fluid-carrying member spaced apart from said first fluid-carrying member; wherein said first fluid-carrying member has a first toothed surface and said second fluid-carrying member has a second toothed surface; wherein the electrical isolator further comprises: a fibre-reinforced polymer tube that overlaps both the first fluid-carrying member and the second fluid-carrying member and which contacts the first toothed surface in a first interface region of the fibre-reinforced polymer tube and which contacts the second toothed surface in a second interface region of the fibre-reinforced polymer tube; and a compression fitting arranged to bias the first interface region and the first toothed surface together.

Provided are devices, methods and systems. A cover system may include 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 may include 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. A holdout 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. The first type of stress control element includes a geometric stress cone that includes an electrically conductive and/or semiconductive portion that is configured to conductively engage a semiconductor layer of the electrical cable. The second type of stress control element includes a high-K stress relief element.

Provided are devices, methods and systems. A cover system may include 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 may include 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. A holdout 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. The first type of stress control element includes a geometric stress cone that includes an electrically conductive and/or semiconductive portion that is configured to conductively engage a semiconductor layer of the electrical cable. The second type of stress control element includes a high-K stress relief element.

The present disclosure describes an electrical cable accessory system for covering an electrical cable and/or cable connection. The electrical cable accessory system includes a pre-expanded cable accessory unit and a time-temperature indicator associated with the pre-expanded cable accessory unit. The pre-expanded cable accessory unit includes a pre-expanded cable accessory formed of an elastomeric material and a removable holdout mounted within the elastomeric cable accessory, wherein the holdout is operative to maintain the elastomeric cable accessory in an expanded state and to permit the elastomeric cable accessory to elastically contract when the holdout is removed from the elastomeric cable accessory. The time-temperature indicator is configured to undergo a visible change in appearance in response to a cumulative heat exposure and signal to a viewer when the elastomeric material of the pre-expanded elastomeric cable accessory unit has experienced a threshold cumulative heat exposure. Methods including the same are also described herein.

The present disclosure describes an electrical cable accessory system for covering an electrical cable and/or cable connection. The electrical cable accessory system includes a pre-expanded cable accessory unit and a time-temperature indicator associated with the pre-expanded cable accessory unit. The pre-expanded cable accessory unit includes a pre-expanded cable accessory formed of an elastomeric material and a removable holdout mounted within the elastomeric cable accessory, wherein the holdout is operative to maintain the elastomeric cable accessory in an expanded state and to permit the elastomeric cable accessory to elastically contract when the holdout is removed from the elastomeric cable accessory. The time-temperature indicator is configured to undergo a visible change in appearance in response to a cumulative heat exposure and signal to a viewer when the elastomeric material of the pre-expanded elastomeric cable accessory unit has experienced a threshold cumulative heat exposure. Methods including the same are also described herein.

Embodiments of the invention are directed to a method for manufacturing a composite polymer insulator. The method includes: providing an elongate core having a core axis, the core including a first core main section, a second core main section, and a core midsection axially interposed between the first and second core main sections; and mounting a joint sleeve around the core midsection. The method further includes molding a polymeric first housing onto the core such that: the first housing surrounds the first core main section; and a joint section the first housing overlaps and bonds to the joint sleeve. The method further includes molding a polymeric second housing onto the core such that: the second housing surrounds the second core main section; and a joint section of the second housing overlaps and bonds to the joint sleeve.

Embodiments of the invention are directed to a method for manufacturing a composite polymer insulator. The method includes: providing an elongate core having a core axis, the core including a first core main section, a second core main section, and a core midsection axially interposed between the first and second core main sections; and mounting a joint sleeve around the core midsection. The method further includes molding a polymeric first housing onto the core such that: the first housing surrounds the first core main section; and a joint section the first housing overlaps and bonds to the joint sleeve. The method further includes molding a polymeric second housing onto the core such that: the second housing surrounds the second core main section; and a joint section of the second housing overlaps and bonds to the joint sleeve.

A dispenser apparatus for a curable liquid material is disclosed. The apparatus comprises a flexible bag defining a first compartment for accommodating a first component of a curable liquid material, and a second compartment for accommodating a second component of the curable liquid material and adapted to communicate with the first chamber to enable mixing of the first and second components to initiate curing of the curable liquid material. A first clamp temporarily prevents mixing of the first and second components, and an elongate nozzle communicates with the second compartment to dispense the mixed curable liquid material therefrom. A second clamp temporarily prevents passage of the curable liquid material from the second compartment to the nozzle.

A dispenser apparatus for a curable liquid material is disclosed. The apparatus comprises a flexible bag defining a first compartment for accommodating a first component of a curable liquid material, and a second compartment for accommodating a second component of the curable liquid material and adapted to communicate with the first chamber to enable mixing of the first and second components to initiate curing of the curable liquid material. A first clamp temporarily prevents mixing of the first and second components, and an elongate nozzle communicates with the second compartment to dispense the mixed curable liquid material therefrom. A second clamp temporarily prevents passage of the curable liquid material from the second compartment to the nozzle.