Safety distance extending method for live operation with earth electric potential of tension resistant tower crossarm

A live work and safe distance technology, applied in the direction of overhead lines/cable equipment, etc., can solve the problem of difficulty in ensuring the normal development of live work, and achieve the effect of simple and practical extension method, convenient operation, and extended safe distance.

Active Publication Date: 2008-10-15
STATE GRID CORP OF CHINA +1
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Problems solved by technology

According to the regulations on live work in the "State Grid Corporation Electricity Safety Work Regulations" (power line part), "the safety distance between the person and the live body during live work shall not be less than 1.0 meters if the voltage level is 110kV." The actual activity space is only less than 600mm. According to the conventional operation method, it is difficult to ensure the normal development of live work

Method used

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  • Safety distance extending method for live operation with earth electric potential of tension resistant tower crossarm
  • Safety distance extending method for live operation with earth electric potential of tension resistant tower crossarm
  • Safety distance extending method for live operation with earth electric potential of tension resistant tower crossarm

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Embodiment Construction

[0032] Best practice:

[0033] see figure 2 , the method for extending the safety distance of live work on the ground potential of the cross-arm of the tension tower is applied to the 110kV line with double circuits on the same tower, including the following steps:

[0034] 1. Two operating rods for live work are provided as the distance limiting rod 1. The rod head 11 of the distance limiting rod 1 is a bolt-type fastening clamp. Part 31, the ring fastener 31 and another ring 32 integrally constructed with it form a double ring anti-slip sleeve 3, and the distance limiting rod 1 shaft 12 is an insulating material,

[0035] 2. The two distance-limiting rods 1 are symmetrically distributed at the center point in the length direction of the jumper 2. After hooking the bolt-type fastening clip of the rod head 11 of the distance-limiting rod 1 to the jumper, fasten the jumper 2 in the clip.

[0036] 3. Bind the tail of the distance-limiting rod 1 to the connection fitting 6 bet...

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Abstract

The invention relates to an overhead line live working method, in particular to a method for expanding the live working safety distance of ground potential of the cross arm of a strain tower. An insulation distance required must be kept between a jumper wire and the cross arm, the jumper wire is opened by a distance expanding bar to increase the distance between the jumper wire and the cross arm at the lower part; a distance limiting bar and the distance expanding bar guarantee the jumper wire to be fixed at a certain position so as to ensure that the operators have sufficient space to operate. Compared with the prior art, the method of the invention has the advantages that: the safety distance is expanded by using the overhead characteristic of the jumper wire to ensure that the operators have sufficient activity space on the cross arm of the strain tower; the expanding method is simple and practical and the operation is convenient so that wiremen can master the method on the basis of skill and no special learning is needed.

Description

technical field [0001] The invention relates to a method for live work on overhead lines, in particular to a method for extending the safe distance of live work at the ground potential of the cross arm of a tension tower. Background technique [0002] Compared with the single-circuit line, the tower type, conductor layout, and phase distance in the tension transmission line erected on the same tower are different, and the size is compact. To a certain extent, it is difficult for daily maintenance and repair, especially for live work bring inconvenience. For example: 110KV transmission line tension tower jumper is in the natural state of operation, the maximum sag of the jumper is 1350mm, and the vertical distance between the upper phase jumper and the closest point of the middle phase cross arm is 1600mm. According to the regulations on live work in the "State Grid Corporation Electricity Safety Work Regulations" (power line part), "the safety distance between the person an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
Inventor 陈国信邓开清吴增辉郑联发洪志超陈安严有祥卢维物游小华洪炳黑谢国伟
Owner STATE GRID CORP OF CHINA
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