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A composite medium-voltage power cable terminal and its installation method

A technology of power cable and installation method, which is applied in the direction of cable terminals, equipment for connecting/terminating cables, etc., which can solve the problems of unsatisfactory cable lines, unfavorable on-site installation work, and inability to realize the temperature rise of cable conductors, so as to delay the aging speed , improve work efficiency, and exert the effect of transmission capacity

Active Publication Date: 2020-05-15
辽宁东电电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Power cable lines are formed by connecting electrical equipment such as overhead lines, switches, and transformers through terminal heads. At present, the outdoor terminals of cross-linked polyethylene power cables with optical fiber temperature measurement systems at home and abroad are generally composed of cable insulation, rubber prefabricated parts, cable conductors and Composed of connecting terminals, it is impossible to accurately measure the actual temperature rise of the cable conductor on-line, and it cannot meet the requirements of connecting the cable line with other electrical equipment and the optical fiber set in the circular conductor can be easily led out, which is not conducive to on-site installation work

Method used

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  • A composite medium-voltage power cable terminal and its installation method
  • A composite medium-voltage power cable terminal and its installation method
  • A composite medium-voltage power cable terminal and its installation method

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Experimental program
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Embodiment 1

[0028] according to Figure 1-3 A composite medium voltage power cable terminal shown includes a cable semiconducting layer 1, a cable conductor 2 is provided at the top of the cable semiconducting layer 1, a connecting terminal 3 is provided at the top of the cable conductor 2, and the cable conductor 2 There is a lead-out optical fiber 4 inside, a cable insulation 5 is provided on the outside of the cable conductor 2, a first insulating self-adhesive tape is provided on the outside of the cable insulation 5, and a longitudinally distributed second insulating tape is provided on one side of the first insulating self-adhesive tape. Two insulating self-adhesive tapes 6, the outside of the second insulating self-adhesive tape 6 is provided with a third insulating self-adhesive tape, the outside of the third insulating self-adhesive tape is provided with a rubber preform 7, and the bottom end of the rubber preform 7 is There is a connection port 8;

[0029] The number of the sec...

Embodiment 3

[0042] according to Figure 2-4 In the composite medium-voltage power cable terminal shown, the outer surface of the cable insulation 5 is covered with a rubber tube 10 with a small groove for placing optical fibers;

[0043] A method for installing a composite medium-voltage power cable terminal specifically includes the following analysis and processing steps:

[0044] Step 1: When installing the cable terminal head, cut off a certain length of cable, reserve an excess length of 1000 mm, remove the outer plastic sheath of the cable, use a chainsaw to cut the outer insulating layer of the cable along the axial direction, and remove the insulating layer , exposing the circular conductor;

[0045] Step 2: Separate each layer of the circular conductor formed by twisting the single wires in the opposite direction of twisting to expose the outgoing optical fiber 4 with a stainless steel sheath set in the center of the conductor, and insert the outgoing optical fiber 4 with a stai...

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Abstract

The invention discloses a composite medium-voltage power cable terminal and an installation method thereof, and specifically relates to the technical field of cable terminals, and relates to the composite medium-voltage power cable terminal and the installation method of the composite medium-voltage power cable terminal. The terminal comprises a cable semi-conducting layer, wherein a cable conductor is arranged at the top end of the cable semi-conducting layer, a connecting terminal is arranged at the top end of the cable conductor, and a leading-out optical fiber is arranged in the cable conductor. According to the invention, the leading-out optical fiber is led out from a of the circular conductor single-wire twisted gap; the optical fiber is led out downwards from the inner surface of arubber prefabricated member to a zero potential position along a small groove arranged between two second insulating self-adhesive tapes; and is connected with an optical fiber of a temperature control box, so that the actual temperature rise of the cable conductor can be accurately measured on line, thereby meeting the requirement that the optical fiber in the circular conductor can be easily led out while a cable circuit is connected with other electrical equipment, achieving the onsite quick installation and improving the work efficiency.

Description

technical field [0001] The invention relates to the technical field of cable terminals, and more specifically, the invention relates to a composite medium-voltage power cable terminal and an installation method thereof. Background technique [0002] With the development and application of distributed optical fiber sensing technology, in order to ensure the safe operation of the transmission of strong electric energy in the power cable line, the power department requires the use of temperature measuring optical fiber to carry out the following automatic monitoring of the safe operation of the power cable line: First, Online real-time temperature detection, in order to realize the whole cable line, has great practical significance: Operation status monitoring: effectively monitor the heating state of the cable under different loads and different ambient temperatures, and accumulate historical technical data; When the allowable operating temperature of the cable is exceeded, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G15/06H02G1/14
Inventor 吕庚民徐明忠叶文忠
Owner 辽宁东电电力技术有限公司