Method for forming a seal on conductors of an electrical cable

摘要

The invention provides a method of forming a seal (62) between and around conductors (12A, 12B and 12C) of an electrical power cable (10), and has particular application as a safety measure in potentially explosive applications. The method includes passing the conductors (12A, 12B and 12C) through an opening in a body (26) so as to define a cavity within the body (26) between and around the conductors (12A, 12B and 12C); introducing an absorbent material (64) into the cavity; introducing a liquid settable material (66) into the cavity; and allowing the settable material (66) to be absorbed by the absorbent material (64) and to set thereby to seal the cavity between and around the conductors (12A, 12B and 12C).

主权项

1. A method of forming a flameproof seal around and in between conductors of an electrical power cable as a safety measure in potentially explosive applications, the method comprising:
passing the conductors through an opening in a body so as to define a cavity within the body around and in between the conductors; pouring an absorbent material into the cavity around and in between the conductors, wherein the absorbent material is in the form of a powder, a granular material, a fibrous material or a mixture or combination thereof; locating a liquid settable material in a container above the absorbent material and subsequently pouring the liquid settable material out of the container and into the absorbent material; and allowing the settable material to be absorbed by the absorbent material and to set thereby to seal the cavity around and in between the conductors, wherein the absorbent material and the liquid settable material are selected so that the seal formed on the conductors is capable, under explosive fault conditions, of preventing hot ignited material from escaping through the body around and/or in between the conductors of the electrical power cable.