| 摘要 |
An electrical connector system, particularly one that connects armored electrical cables for oil wells through an upper surface connector that is mated to a feed-through mandrel, automatically operates a circuit breaker in the main power circuit as the upper connector is unmated from the mandrel. A pair of relay (R) wires are carried with the main power conductors through the upper connector. A set of relay (R) contacts, preferably pins and sockets, electrically connect the R wires between the connector and the mandrel. The contacts in the mandrel are wired together. Unmating the connector withdraws the R pins from their sockets which trips a relay or otherwise operates the main circuit breaker. Power (P) contacts, preferably pins and sockets, for the main power conductors are longer than the R pins so that power in the main conductors is shut off before arcing can occur. Preferably this "quick disconnect" relay circuit is used in conjunction with an improved lip seal formed on the mating end of a resilient insulating body filling the connector. The inner diameter of the resilient lip is less than the outer diameter of the mating portion of the mandrel to stretch the lip seal and thereby establish a very tight fit when the connector is attached to the mandrel. The lip seal isolates the interior of the connection site from fluids surrounding the connector and is sufficiently long that it continues to seal even during uncoupling to prevent an explosion due to arcing at the R contacts.
|
