Uninterruptible-operated bypass connection device applied between European ring main unit and American type ring main unit

Abstract

The invention discloses an uninterruptible-operated bypass connection device applied between a European ring main unit and an American type ring main unit. The bypass connection device is arranged between the European ring main unit and the American type ring main unit, and comprises a first flexible cable connecting device, a bypass switch and a second flexible cable connecting device which are sequentially connected. A European cable terminal is formed by a T-shaped sleeve pipe and a cable wiring terminal which can be separated, and a cable with the cable wiring terminal is firstly led in through an entrance hole of the European ring main unit, and is then inserted in through a lower end port of a vertical pipe part of the T-shaped sleeve pipe, so that the connection of the European cable terminal and a European cable sleeve pipe is convenient. According to the device, the characteristic that a flexible cable shielded wire is all connected is utilized, an earth connection point is led to a bypass switch from the cable terminal, and a ground wire has no need to be erected additionally. The flexible cable connecting device has a simple structure and is convenient to use, the operation range is reduced, uninterruptible-operated overhaul operation is convenient, and the reliability of supplying power to the wire is improved.

Description

technical field [0001] The invention relates to a bypass connection device for non-power-off operation between European-style and American-style ring network cabinets. Background technique [0002] When the underground cable between the two ring network cabinets is abnormal and needs to be repaired, after laying the bypass connection device on the ground and taking safety protection measures, the bypass connection device replaces the underground cable to supply power to the ring network cabinet, so as to achieve non-stop (less power outage) maintenance the goal of. [0003] The bypass connection device is mainly composed of a bypass switch, a cable terminal connected to the cable sleeve of the ring network cabinet at one end, and a flexible cable connected with the bypass switch at the other end. [0004] At present, the cable bushings in the European-style ring network cabinet mostly use fully insulated, fully enclosed, and fully sealed cable terminals, which cannot be sep...

AI Technical Summary

Problems solved by technology

[0004] At present, the cable bushings in the European-style ring network cabinet mostly use fully insulated, fully enclosed, and fully sealed cable terminals, which cannot be separated from the cables connected to them.

[0005] When laying the bypass connection device, due to the small space of the inlet hole of the European-style ring network cabinet, and the large volume of the cable terminal enclosed with the bypass connection device, it is impossible to enter the European-style ring network smoothly through the wire inlet hole. cabinet, which makes it more difficult to connect the bypass connection device to the European-style ring network cabinet. Often, the effective connection between the ring network cabinet and the bypass connection device can not be implemented to expand the scope of work, which brings inconvenience to the maintenance operation without power failure

[0006] At the same time, the grounding of the bypass connection device is mainly realized through the grounding wire that is installed on the metal shielding shell of the cable terminal and connected to the ground. , Convenient construction, and such a grounding method requires an additional grounding wire when laying the bypass connection device, which increases the construction time and difficulty, and brings inconvenience to the maintenance operation without power failure

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