Current fault detection device of three-phase crossover cable

A crossover cable and fault detection technology, which is applied in the field of detection, can solve the problems such as the inability to detect whether a fault occurs in a three-phase crossover cable

Inactive Publication Date: 2018-02-23
STATE GRID BEIJING ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides a three-phase cross cable current fault detection device to at least solve the technical problem in the related art that it is impossible to detect whether a three-phase cross cable is faulty

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  • Current fault detection device of three-phase crossover cable
  • Current fault detection device of three-phase crossover cable
  • Current fault detection device of three-phase crossover cable

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a current fault detection device of a three-phase crossover cable. The current fault detection device comprises six current sensors. Each current sensor is used for monitoringthe sheath current value of a sheath connecting line in a crossing connection grounding case, and the six current sensors are corresponding to the six sheath connecting lines in the crossing connection grounding case in a one-to-one manner. The current fault detection device also comprises a processor, which is connected to the six current sensors, and is used for determining whether the sheath fault occurs based on the comparison result of the six sheath current values and the operation current value. The invention resolves the technical problem of the prior art that whether the fault of thethree-phase cross-over cable occurs cannot be detected.

Description

technical field [0001] The invention relates to the detection field, in particular to a three-phase cross cable current fault detection device. Background technique [0002] With the development of urban power systems, high-voltage cross-linked polyethylene (XLPE) cables are more and more widely used in urban distribution networks, and the cable load is also increasing. However, the operation of a large number of single-core high-voltage cables makes the cable grounding current The problem of too large is also becoming more and more prominent. [0003] According to the electrical safety regulations, the metal sheath of high-voltage cables must be grounded. The main difference between XLPE high-voltage cables and ordinary low-voltage cables is that the former adopts a single-core structure, so the inner core current of the cable will induce an alternating magnetic field around it, so that the metal sheath of the cable is under the action of the alternating magnetic field. A...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/081
Inventor 王世勇李捷陈斌发刘兆燕程序张竟成汪剑波
Owner STATE GRID BEIJING ELECTRIC POWER
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