CN204679587U - Cable fault detector - Google Patents

Cable fault detector Download PDF

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Publication number
CN204679587U
CN204679587U CN201520402952.6U CN201520402952U CN204679587U CN 204679587 U CN204679587 U CN 204679587U CN 201520402952 U CN201520402952 U CN 201520402952U CN 204679587 U CN204679587 U CN 204679587U
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CN
China
Prior art keywords
circuit
central processing
processing unit
cable
fault detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201520402952.6U
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Chinese (zh)
Inventor
官宇哲
张广新
王敏珍
高源�
曲林奎
索巍武
满成
孙迪
李哲
魏大庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changchun Institute of Applied Chemistry of CAS
State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
Changchun Institute Technology
Original Assignee
State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
Changchun Institute Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Liaoning Electric Power Co Ltd, Changchun Institute Technology filed Critical State Grid Corp of China SGCC
Priority to CN201520402952.6U priority Critical patent/CN204679587U/en
Application granted granted Critical
Publication of CN204679587U publication Critical patent/CN204679587U/en
Active legal-status Critical Current
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Abstract

The utility model relates to a kind of cable fault detector, comprise fault measuring circuit, Power arithmetic device, voltage-frequency converter, central processing unit and wireless transmitting unit, fault measuring circuit is connected with Power arithmetic device, voltage-frequency converter and central processing unit successively by optical fiber, failure message is sent to the data acquisition unit of host computer by central processing unit by wireless transmitting unit, described fault measuring circuit comprises zero sequence current measurement circuit and current phasor measurement circuit.Be installed on the cable fault detector in cable distribution box, when cable breaks down, abort situation can be realized and report to the police, greatly shorten trouble shooting time.

Description

Cable fault detector
Technical field
The utility model relates to a kind of fault test set, particularly relates to a kind of cable fault detector, is particularly useful for underground cable.
Background technology
It is a very important job that localization of fault detects, and when overhead transmission line breaks down, can pass through line walking looking up the fault.And cable is buried in underground, cannot directly check, branched line is a lot of again, and railway superstructures is complicated, and therefore localization of fault is very difficult.
Utility model content
The utility model, for above-mentioned problems of the prior art, provides a kind of cable fault detector, solves the problem of underground cable location difficulty in prior art.
The technical solution of the utility model is as follows:
Cable fault detector comprises fault measuring circuit, Power arithmetic device, voltage-frequency converter, central processing unit and wireless transmitting unit, fault measuring circuit is connected with Power arithmetic device, voltage-frequency converter and central processing unit successively by optical fiber, failure message is sent to the data acquisition unit of host computer by central processing unit by wireless transmitting unit, described fault measuring circuit comprises zero sequence current measurement circuit and current phasor measurement circuit.
Described zero sequence current measurement circuit and current phasor measurement circuit comprise signal conditioning circuit and A/D sample circuit respectively, and the output terminal of signal conditioning circuit connects the input end of A/D sample circuit, and the output terminal of A/D sample circuit connects Power arithmetic device.
Described signal conditioning circuit comprises filter capacitor, full-wave rectifying circuit and protection circuit.
Described A/D sample circuit comprises I/V translation circuit and A/D converter.
The utility model has the advantages of as follows:
Be installed on the cable fault detector in cable distribution box, when cable breaks down, abort situation can be realized and report to the police, greatly shorten trouble shooting time.
Accompanying drawing explanation
Fig. 1 is structural schematic block diagram of the present utility model.
Embodiment
Referring to accompanying drawing, in conjunction with specific embodiments, the utility model is described in detail.
embodiment 1
As shown in Figure 1, cable fault detector comprises fault measuring circuit, Power arithmetic device, voltage-frequency converter, central processing unit and wireless transmitting unit, fault measuring circuit is connected with Power arithmetic device, voltage-frequency converter and central processing unit successively by optical fiber, failure message is sent to the data acquisition unit of host computer by central processing unit by GPRS or optical fiber, described fault measuring circuit comprises zero sequence current measurement circuit and current phasor measurement circuit.Described zero sequence current measurement circuit and current phasor measurement circuit comprise signal conditioning circuit and A/D sample circuit respectively, and the output terminal of signal conditioning circuit connects the input end of A/D sample circuit, and the output terminal of A/D sample circuit connects Power arithmetic device.Described signal conditioning circuit comprises filter capacitor, full-wave rectifying circuit and protection circuit.Described A/D sample circuit comprises I/V translation circuit and A/D converter.
When line failure, metering circuit on fault branch will be triggered after a failure, by optical fiber, alerting signal is sent to Power arithmetic device, voltage-frequency converter is sent to after the conversion of Power arithmetic device, signal is converted to pulse and sends to central processing unit by voltage-frequency converter, luminous indication fault after central processing unit is disposed, its digitally encoded signal is passed through short-distance wireless transmitter unit simultaneously, send to neighbouring data acquisition unit in the mode of radiowave, communication distance is between 0-800m.
The above know-why being specific embodiment of the utility model and using, any based on the equivalent transformation on technical solutions of the utility model basis, all belong within protection domain of the present utility model.

Claims (4)

1. cable fault detector, it is characterized in that comprising fault measuring circuit, Power arithmetic device, voltage-frequency converter, central processing unit and wireless transmitting unit, fault measuring circuit is connected with Power arithmetic device, voltage-frequency converter and central processing unit successively by optical fiber, failure message is sent to the data acquisition unit of host computer by central processing unit by wireless transmitting unit, described fault measuring circuit comprises zero sequence current measurement circuit and current phasor measurement circuit.
2. cable fault detector according to claim 1, it is characterized in that described zero sequence current measurement circuit and current phasor measurement circuit comprise signal conditioning circuit and A/D sample circuit respectively, the output terminal of signal conditioning circuit connects the input end of A/D sample circuit, and the output terminal of A/D sample circuit connects Power arithmetic device.
3. cable fault detector according to claim 2, is characterized in that described signal conditioning circuit comprises filter capacitor, full-wave rectifying circuit and protection circuit.
4. cable fault detector according to claim 2, is characterized in that described A/D sample circuit comprises I/V translation circuit and A/D converter.
CN201520402952.6U 2015-06-12 2015-06-12 Cable fault detector Active CN204679587U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520402952.6U CN204679587U (en) 2015-06-12 2015-06-12 Cable fault detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520402952.6U CN204679587U (en) 2015-06-12 2015-06-12 Cable fault detector

Publications (1)

Publication Number Publication Date
CN204679587U true CN204679587U (en) 2015-09-30

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ID=54179270

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520402952.6U Active CN204679587U (en) 2015-06-12 2015-06-12 Cable fault detector

Country Status (1)

Country Link
CN (1) CN204679587U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104880646A (en) * 2015-06-12 2015-09-02 国家电网公司 Cable fault detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104880646A (en) * 2015-06-12 2015-09-02 国家电网公司 Cable fault detector

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