A kind of transmission lines earth fault detector
Technical field
The present invention relates to a kind of transmission lines earth fault detector, belong to electricity consumption service technique field.
Background technology
In transmission line malfunction; Especially in the fault of mesohigh transmission line of electricity; Transmission line of electricity causes earth fault the most common because of Insulation Problems, and the long and disguised height in trouble spot does not still have effective testing tool in addition at present by transmission line of electricity; Definite and eliminating to transmission lines earth fault point has caused great difficulty; And since during many fault detects transmission line of electricity be that operating personnel are the states that are in hot line job, operating personnel's Danger Electric shock risk feelings are bigger, therefore press at present a kind of can be quickly and easily to the transmission lines earth fault point location and can effectively reduce the get an electric shock equipment of risk of operating personnel.
Summary of the invention
The object of the invention just is to overcome above-mentioned deficiency, and a kind of transmission lines earth fault detector is provided.
For realizing above-mentioned purpose, the present invention realizes through following technical scheme:
A kind of transmission lines earth fault detector; Described transmission lines earth fault detector is made up of housing, guidance panel, hi-line, ground wire and governor circuit; Described governor circuit is made up of power module, switch, potentiometer, D/A inversion module, positive terminal, negative terminal, detection module, output module, display module and alarm module; Power module, switch, potentiometer and D/A inversion module are electrically connected, and positive terminal and negative terminal all are electrically connected with output module, and detection module and output module all are electrically connected with the D/A inversion module; Alarm module and display module all are electrically connected with detection module; Described guidance panel reliably is connected with housing, and viewing area and zone of alarm are set on the guidance panel, and switch, potentiometer, positive terminal, negative terminal and display module all are embedded in the guidance panel upper surface; Described hi-line is connected through bolt with positive terminal, and ground wire is connected through bolt with negative terminal.
Detection module is made up of boosting unit, filter unit, driver element, main control unit, high voltage detecting unit, DC voltage detecting unit and direct current detection unit; Wherein filter unit is electrically connected with boosting unit, driver element, main control unit, high voltage detecting unit, DC voltage detecting unit and direct current detection unit respectively, and driver element, high voltage detecting unit, DC voltage detecting unit and direct current detection unit are electrically connected with main control unit respectively.
Output module is made up of boosting unit and filter unit, and boosting unit and filter unit are electrically connected.
Display module is that pointer high-tension voltmeter, D.C. voltmeter and DC ammeter constitute.
Display module is that digital high-tension voltmeter, D.C. voltmeter and DC ammeter constitute.
Display module is the integral type LCD.
Alarm module is hummer, acousto-optic hummer or electric whistle.
Housing, guidance panel, hi-line, the ground wire class of insulation are not less than 0.6/1KV.
The present invention has following beneficial effect:
1, device structure is simply light, is convenient under various occasions, use.
2, operation of equipment is simple and stable precision high, has effectively saved transmission lines earth fault detection time, has reduced maintenance job intensity, has improved work efficiency.
3, apparatus insulated grade is high, has improved personnel's personal safety guarantee in the Earth Fault Detection greatly.
Description of drawings
Fig. 1 is a master control borad electrical principle block diagram
Fig. 2 is a detection module electrical principle block diagram
Fig. 3 is an output module electrical principle block diagram
Fig. 4 is the guidance panel synoptic diagram.
Embodiment
Like Fig. 1,2, shown in 3 and 4; A kind of transmission lines earth fault detector; Described transmission lines earth fault detector is made up of housing 1, guidance panel 2, hi-line 3, ground wire 4 and governor circuit; Described governor circuit is made up of power module, switch 5, potentiometer 6, D/A inversion module, positive terminal 7, negative terminal 8, detection module, output module, display module and alarm module; Power module, switch 7, potentiometer 8 and D/A inversion module are electrically connected, and positive terminal 7 and negative terminal 8 all are electrically connected with output module, and detection module and output module all are electrically connected with the D/A inversion module; Alarm module and display module all are electrically connected with detection module; Described guidance panel 2 reliably is connected with housing 1, and viewing area 9 and zone of alarm 10 are set on the guidance panel 2, and switch 5, potentiometer 6, positive terminal 7, negative terminal 8 and display module all are embedded in guidance panel 2 upper surfaces; Described hi-line 3 and positive terminal 7 are connected through bolt, and ground wire 4 and negative terminal 8 are connected through bolt.
Detection module is made up of boosting unit, filter unit, driver element, main control unit, high voltage detecting unit, DC voltage detecting unit and direct current detection unit; Wherein filter unit is electrically connected with boosting unit, driver element, main control unit, high voltage detecting unit, DC voltage detecting unit and direct current detection unit respectively, and driver element, high voltage detecting unit, DC voltage detecting unit and direct current detection unit are electrically connected with main control unit respectively.
Output module is made up of boosting unit and filter unit, and boosting unit and filter unit are electrically connected.
During use, faulty line outage at first to be detected, ground wire reliable ground of the present invention then; Again hi-line reliably is connected with insulation rod, and hi-line and faulty line to be detected is touched, when really fault being arranged as if faulty line to be detected through insulation rod; Alarm module of the present invention is reported to the police; Display module descends the display voltage value, and current value rises, thereby can judge the position of trouble spot.
Before using the present invention, operating personnel must handle the power failure formality according to flow process, and must have at least two people simultaneously on the scene, and operating personnel can operate after also should carrying out self insulating protection, handle according to program after pending fault detects and finishes again and send electric hand continuous.