Abstract: Provided according to embodiments of the invention are electrical stress grading compositions that include a polymer, inorganic nanoplatelets, and inorganic filler particles, wherein the inorganic nanoplatelets and the inorganic filler particles are dispersed in the polymer. Also provided are electrical devices that include such electrical stress grading compositions including, for example, power cable accessories, insulators, bushings, and surge arrestors. Further provided according to embodiments of the invention are methods of forming electrical stress grading compositions.

Abstract: 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.

Abstract: A connector terminating an end of an electrical cable includes an outer surface, and a radio frequency (RF) sensor tag is secured to the connector outer surface and includes a temperature sensor and an antenna. In response to the RF sensor tag receiving an interrogation signal from a remote RF reader, the temperature sensor is configured to detect a temperature of the connector and generate a temperature data signal, and the antenna is configured to transmit the temperature data signal to the remote RF reader.

Abstract: A cable neutral wires connector for connecting neutral wires of a cable, the cable having a cable longitudinal axis, includes a connector body, a plurality of neutral wire ports, and at least one securing mechanism. The neutral wire ports are defined in the connector body. The neutral wire ports are each configured to receive at least one of the neutral wires therethrough. The at least one securing mechanism is configured to secure the neutral wires in the connector body. The connector body is configured to be mounted on the cable such that the neutral wire ports are circumferentially distributed about the cable longitudinal axis.

Abstract: 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.

Abstract: A cable neutral wires connector for connecting neutral wires of a cable, the cable having a cable longitudinal axis, includes a connector body, a plurality of neutral wire ports, and at least one securing mechanism. The neutral wire ports are defined in the connector body. The neutral wire ports are each configured to receive at least one of the neutral wires therethrough. The at least one securing mechanism is configured to secure the neutral wires in the connector body. The connector body is configured to be mounted on the cable such that the neutral wire ports are circumferentially distributed about the cable longitudinal axis.

Abstract: A seal system for an oil-filled cable termination including a cable extending through each of a cable gland and a stress cone that is spaced apart from the cable gland. The seal system includes: a first oil seal layer surrounding the cable between the cable gland and the stress cone; a second oil seal layer overlapping and contacting the first oil seal layer; a first oil barrier layer overlapping and contacting an upper portion of the second oil seal layer; a second oil barrier layer overlapping and contacting a lower portion of the second oil seal layer, the second oil barrier layer spaced apart from the first oil barrier layer; and a heat shrinkable tube secured around the first and second oil barrier layers.

Abstract: A method for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes providing a splice body assembly including: an electrically insulative, elastomeric splice body having an interior surface defining an interior passage; and a layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable, electrically insulative material. The method further includes mounting the splice body assembly on the cable splice connection such that the layer of the conformable mastic is interposed between and engages each of the interior surface of the splice body and an opposing interface surface of the cable insulation layer.

Abstract: Described herein is a seal system for an oil-filled cable termination including a cable extending through each of a cable gland and a stress cone that is spaced apart from the cable gland. The seal system includes: a first oil seal layer surrounding the cable between the cable gland and the stress cone; a second oil seal layer overlapping and contacting the first oil seal layer; a first oil barrier layer overlapping and contacting an upper portion of the second oil seal layer; a second oil barrier layer overlapping and contacting a lower portion of the second oil seal layer, the second oil barrier layer spaced apart from the first oil barrier layer; and a heat shrinkable tube secured around the first and second oil barrier layers.

Abstract: A cold shrinkable termination has an electric power cable, an insulation body, and a stress control tube. The electric power cable has a conductor core, an insulation layer covering the conductor core, and a conductive shielding layer covering the insulation layer. The insulation body has a first end portion and an opposite second end portion. The stress control tube is disposed in the insulation body adjacent to the second end portion of the insulation body. The stress control tube has a first tube portion directly overlapped on the insulation layer of the electric power cable, and a second tube portion directly overlapped on the conductive shielding layer of the electric power cable and extending a predetermined length thereon when the cold shrinkable termination is mounted on the electric power cable.

Abstract: A cover assembly for covering an elongate substrate includes a holdout device and a resilient, elastically radially expanded sleeve member. The holdout device includes a core having an axially extending slit defined therein and defining a core passage to receive the substrate, and a designated target region. The sleeve member defines an axially extending sleeve passage. The sleeve member is mounted on the core such that the core is disposed in the sleeve passage and the sleeve member exerts a radially compressive recovery force on the core. When the substrate is disposed in the core passage and a radially directed release force is applied to the target region, the core will reduce in circumference and collapse around the substrate under the recovery force of the sleeve member to a collapsed position.

Abstract: A method for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes providing a splice body assembly including: an electrically insulative, elastomeric splice body having an interior surface defining an interior passage; and a layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable, electrically insulative material. The method further includes mounting the splice body assembly on the cable splice connection such that the layer of the conformable mastic is interposed between and engages each of the interior surface of the splice body and an opposing interface surface of the cable insulation layer.

Abstract: A method for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes providing a splice body assembly including: an electrically insulative, elastomeric splice body having an interior surface defining an interior passage; and a layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable, electrically insulative material. The method further includes mounting the splice body assembly on the cable splice connection such that the layer of the conformable mastic is interposed between and engages each of the interior surface of the splice body and an opposing interface surface of the cable insulation layer.

Abstract: A cover assembly for covering an elongate substrate includes a holdout device and a resilient, elastically radially expanded sleeve member. The holdout device includes a core having an axially extending slit defined therein and defining a core passage to receive the substrate, and a designated target region. The sleeve member defines an axially extending sleeve passage. The sleeve member is mounted on the core such that the core is disposed in the sleeve passage and the sleeve member exerts a radially compressive recovery force on the core. When the substrate is disposed in the core passage and a radially directed release force is applied to the target region, the core will reduce in circumference and collapse around the substrate under the recovery force of the sleeve member to a collapsed position.

Abstract: A cover assembly for covering an elongate substrate includes a holdout device and a resilient, elastically radially expanded sleeve member. The holdout device includes a core having an axially extending slit defined therein and defining a core passage to receive the substrate, and a designated target region. The sleeve member defines an axially extending sleeve passage. The sleeve member is mounted on the core such that the core is disposed in the sleeve passage and the sleeve member exerts a radially compressive recovery force on the core. When the substrate is disposed in the core passage and a radially directed release force is applied to the target region, the core will reduce in circumference and collapse around the substrate under the recovery force of the sleeve member to a collapsed position.

Abstract: A joint body for protecting an electrical cable connection including an electrical cable includes an expandable, elastomeric bladder sleeve and an electrically insulating gel. The bladder sleeve defines a gel cavity and a cable passage to receive the electrical cable. The gel is disposed in the gel cavity and surrounds at least a portion of the cable passage. The joint body is configured to be installed on the connection such that the connection is disposed in the cable passage and is surrounded and electrically insulated by the gel.

Abstract: A cold shrinkable termination is disclosed having an electric power cable, an insulation body, and a stress control tube. The electric power cable has a conductor core, an insulation layer covering the conductor core, and a conductive shielding layer covering the insulation layer. The insulation body has a first end portion and an opposite second end portion. The stress control tube is disposed in the insulation body adjacent to the second end portion of the insulation body. The stress control tube has a first tube portion directly overlapped on the insulation layer of the electric power cable, and a second tube portion directly overlapped on the conductive shielding layer of the electric power cable and extending a predetermined length thereon when the cold shrinkable termination is mounted on the electric power cable.

Abstract: A joint body for protecting an electrical cable connection including an electrical cable includes an expandable, elastomeric bladder sleeve and an electrically insulating gel. The bladder sleeve defines a gel cavity and a cable passage to receive the electrical cable. The gel is disposed in the gel cavity and surrounds at least a portion of the cable passage. The joint body is configured to be installed on the connection such that the connection is disposed in the cable passage and is surrounded and electrically insulated by the gel.

Abstract: A method for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes providing a splice body assembly including: an electrically insulative, elastomeric splice body having an interior surface defining an interior passage; and a layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable, electrically insulative material. The method further includes mounting the splice body assembly on the cable splice connection such that the layer of the conformable mastic is interposed between and engages each of the interior surface of the splice body and an opposing interface surface of the cable insulation layer.

Abstract: A cover assembly for covering an elongate substrate includes a holdout device and a resilient, elastically radially expanded sleeve member. The holdout device includes a core having an axially extending slit defined therein and defining a core passage to receive the substrate, and a designated target region. The sleeve member defines an axially extending sleeve passage. The sleeve member is mounted on the core such that the core is disposed in the sleeve passage and the sleeve member exerts a radially compressive recovery force on the core. When the substrate is disposed in the core passage and a radially directed release force is applied to the target region, the core will reduce in circumference and collapse around the substrate under the recovery force of the sleeve member to a collapsed position.