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Method for parallel-connection network access of cable branch box or ring main unit and T-shaped shunt device

A shunt device and cable connection technology, applied in circuits, electrical components, conductive connections, etc., can solve problems such as casualties, economic losses, power grid blackouts, etc., to facilitate domestic electricity consumption, reduce economic losses, and improve power supply reliability. Effect

Active Publication Date: 2015-09-09
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the cable branch box and the ring network cabinet are the main electrical equipment for the distribution of power supply lines in cities in my country. In actual work, both the cable branch box and the ring network cabinet are connected to the power supply line in series, resulting in the need for the entire power grid when they are repaired or replaced. Power failure affects daily life and work, causing economic losses; at the same time, there are two incoming and returning cables in the cable branch box and the ring network cabinet. The power supply can only be restored after the two cables are connected, which increases the workload and In addition, when the cable of a certain user is withdrawn during the live operation, if the cable entering and returning to the power grid is removed by mistake, it will cause casualties, cause a sudden power failure, affect daily life, and cause economic losses
When the cable branch boxes close to the two power sources fail, it will also affect the power supply of the whole line, and the power supply reliability is not high

Method used

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  • Method for parallel-connection network access of cable branch box or ring main unit and T-shaped shunt device
  • Method for parallel-connection network access of cable branch box or ring main unit and T-shaped shunt device
  • Method for parallel-connection network access of cable branch box or ring main unit and T-shaped shunt device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment one, such as figure 1 As shown, the T-shaped shunt device on the main power supply line disclosed in this embodiment mainly includes an I-shaped T-joint 1 , a butt joint 2 and an I-shaped linear connection terminal 3 .

[0037] The Ι-type T-joint 1 is an integral part of the Ι-type T-shaped inner conductor and the Ι-type T-shaped hard insulating sleeve 11 embedded with the Ι-type T-shaped inner conductor 12, and the Ι-type T-shaped hard insulating sleeve 11 is in three directions. The lengths are all greater than the length of the I-type T-shaped inner conductor 12, and the three ports all form an arc extinguishing chamber. The three ports of the Ι-type T-shaped internal conductor 12 are all threaded connection structures of internally threaded holes, and the threads at both ends of the head rotate in opposite directions.

[0038]The butt joint 2 is an integral part of an internal conductor 21 and a hard insulator 22 embedded with the internal conductor 21. ...

Embodiment 2

[0044] Embodiment two, such as figure 2 As shown, the T-shaped shunt device on the main power supply line disclosed in this embodiment mainly includes a Type II T-shaped joint 1a, a butt joint 2 and a Type II straight connection terminal 3a, and the Type II T-shaped joint 1a is the same as that in Embodiment 1. The difference between the Ι-type T-shaped joint 1 is that the rod connection structure of the T-shaped internal conductor is an external thread head, and the difference between the Ⅱ-type linear connection terminal 3a and the Ι-type linear connection terminal 3 in Embodiment 1 is that the two ends of the internal conductor The connection structures are all internal threaded holes, and the diameter of the outer wall of the arc extinguishing outer wall of the outer hard insulating sleeve is smaller than the diameter of the outer wall of the cable connection. The butt joint 2 is upside down with the arrangement in the first embodiment. Other structures and operations of...

Embodiment 3

[0045] Embodiment three, such as image 3 As shown, the T-shaped shunt device on the main power supply line disclosed in this embodiment mainly includes a Type III T-joint 1b, a butt joint 2 and a Type II linear connection terminal 3a, and the T-shaped interior of the Type III T-joint 1b The connection structures of the three connection ends of the conductor are all external thread heads, and the inner diameters of the three ports of the T-shaped hard insulating sleeve are all larger than the outer diameters of the external thread heads. Other structures and operations of this embodiment are the same as those of Embodiment 2.

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Abstract

The invention discloses a method for parallel-connection network access of a cable branch box or a ring main unit and a corresponding T-shaped shunt device. The T-shaped shunt device comprises a T-shaped joint, a shunt docking member and a shunt cable connecting terminal, each of the T-shaped joint, the shunt docking member and the shunt cable connecting terminal is an integral member composed of an inside conductor and an outside hard insulating sleeve, each inside conductor is embedded in the corresponding hard insulating sleeve, a connecting end of the inside conductor is of a threaded connection structure, two ends of the head of the T-shaped joint are connected a main power supply cable connecting terminal, and the shunt cable connecting terminal and a rod portion of each T-shaped joint are connected integrally to form a shunt branch, contact with an insulator only during connection and can be connected when being electrified; each of the inside conductor and the outside hard insulating sleeve of the T-shaped joint is T-shaped, and rotating directions of threads at two ends of the head of the inside conductor of the T-shaped joint and at two ends of the inside conductor of the shunt docking member are opposite. A plurality of the T-shaped shunt devices are connected on a main power supply circuit to form parallel-connection branch circuits, and the cable branch box or the ring main unit on each branch circuit works independently without mutual influence, so that reliability and safety in power supply are improved.

Description

technical field [0001] The invention relates to a power supply line, in particular to a method for connecting a cable branch box / ring network cabinet to a power grid in parallel and a T-shaped shunt device. Background technique [0002] At present, the cable branch box and the ring network cabinet are the main electrical equipment for the distribution of power supply lines in cities in my country. In actual work, both the cable branch box and the ring network cabinet are connected to the power supply line in series, resulting in the need for the entire power grid when they are repaired or replaced. Power failure affects daily life and work, causing economic losses; at the same time, there are two incoming and returning cables in the cable branch box and the ring network cabinet. The power supply can only be restored after the two cables are connected, which increases the workload and In addition, when a user's cable is withdrawn during live work, if the cable entering and retu...

Claims

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Application Information

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IPC IPC(8): H01R11/00H01R11/01H01R11/03H01R11/05H01R11/07H01R4/20H01R43/00
Inventor 邓晓廉刘军志
Owner STATE GRID CORP OF CHINA
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