Cable laying method and bracket thereof

A cable laying and cable technology, which is applied in the field of cable laying and its support, can solve the problems of difficulty, large longitudinal induced voltage of cable aluminum sheath, etc., and achieve the effects of reducing induced voltage, good energy saving effect, and reducing civil construction costs
CN102623935AInactive Publication Date: 2012-08-01李超 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
李超
Publication Date
2012-08-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a cable laying method and a bracket thereof. More than one group of three-phase cables is arranged along the circumference direction of a concentric circle, so that the same group of three cables is arranged on the same circumference, and included angles between every two cables are 120 DEG. The bracket has the advantages of simple structure, low cost, minimum longitudinal induced voltage, and better energy saving effect because longitudinal induced voltages in the whole circulating section are mutually cancelled out as smallest as possible, even zero.
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Description

technical field

[0001] The invention relates to a cable laying method and its support. Background technique

[0002] The existing power cable laying methods are generally divided into three types: direct buried cables, laying through pipes, and laying in tunnels.

[0003] The three-phase cables of each circuit are generally arranged in layers: the arrangement is horizontal, vertical and triangular.

[0004] When the AC working current or fault current flows through the cable core wire, it will form self-inductance and mutual inductance alternating magnetic flux, which will generate an induced electromotive force on its own metal sheath, that is, self-inductance potential; The mutual induced electromotive force is generated on the metal sheath of the cable, that is, the mutual inductance potential. This induced potential is distributed along the cable axis, so it is called longitudinal induced electromotive force. At this time, if two points of the cable metal sheath are gr...

Claims

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