CN205665317U - Cable is to ground parameter testing appearance - Google Patents
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- CN205665317U CN205665317U CN201620567258.4U CN201620567258U CN205665317U CN 205665317 U CN205665317 U CN 205665317U CN 201620567258 U CN201620567258 U CN 201620567258U CN 205665317 U CN205665317 U CN 205665317U
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Abstract
The utility model provides a cable is to ground parameter testing appearance relates to the integrated circuit field. This cable is to ground parameter testing appearance includes controller, resistance switching circuit and electric current acquisition circuit, and the resistance switching circuit includes different current -limiting resistor of two at least resistances and the change over switch the same with resistance quantity, and every current -limiting resistor and one the 1st change over switch all establish ties in electric current acquisition circuit and await measuring between the cable with one, and electric current acquisition circuit is used for current signal transmission to the controller of gathering, and the controller is used for turning into the current value with the current signal of acquisition and exports. More approaching the floor drain flow valuve that this cable is to ground parameter testing appearance recorded is real to the floor drain flow valuve to what record is more accurate to the floor drain flow valuve.
Description
Technical field
This utility model relates to integrated circuit fields, in particular to a kind of cable parameter tester over the ground.
Background technology
Insulating leakage current tester is used to the insulation against ground resistance testing signal cable and automatically surveys with a kind of of leakage current over the ground
Examination equipment.During test, send test command by computer and control insulating leakage current tester control relay assembly,
The signal cable needing test is selected to access insulation against ground test collecting cassette or the leakage current test over the ground of insulating leakage current tester
Collecting cassette, Insulation test collecting cassette or leakage current test collecting cassette collection insulation resistance signal or over the ground leakage current signal over the ground,
And by master controller according to insulation resistance signal or over the ground leakage current signal calculate insulating resistance value and leakage current value over the ground, then
By CAN by insulating resistance value and over the ground leakage current value upload to computer, thus user can be made to observe at computer
Cable parameter over the ground.Measuring over the ground during leakage current, owing to the value of leakage current over the ground of cable under test not can exceed that certain peace
Full threshold value (such as 20mA), it is therefore desirable to add current-limiting resistance and the electric current flowing through cable under test is carried out current limliting detect again, when
So, the value of leakage current over the ground of the least signal cable detected of current-limiting resistance is closer to real leakage current value over the ground.
When the value of leakage current over the ground of signal cable is acquired by insulating leakage current tester of the prior art, in order to avoid stream
The electric current crossing cable under test is excessive, uses bigger current-limiting resistance (such as 1k resistance) to carry out current limliting, then carries out leakage current over the ground and take
Sample gathers, and fixes yet with current-limiting resistance resistance, causes test result to differ bigger with actual value.
Utility model content
In view of this, the purpose of this utility model embodiment is to provide a kind of cable parameter tester over the ground, to improve
Above-mentioned problem.
A kind of cable parameter tester over the ground that this utility model embodiment provides, including controller, resistance switching circuit
And current collection circuit, described resistance switching circuit include current-limiting resistance that at least two resistance is different and with described current limliting electricity
The first switching switch that resistance quantity is identical, each described resistance and a described first switching switch are all series at described electric current and adopt
Between collector and a cable under test, the current signal transfer that described current collection circuit is used for collecting is to described control
Device, described controller is for being converted into current value by the current signal of acquisition and exporting.
Further, described cable parameter tester over the ground also includes that the first voltage collection circuit and the second switching are opened
Closing, the double-throw contact of described second switching switch is for connecting the resistance of each described resistance switching circuit or described first voltage
Acquisition Circuit, the fixed contact of described second switching switch is connected between described cable under test and described double-throw contact.
Further, described cable parameter tester over the ground also includes that the 3rd switching switch, contrast resistance, the second voltage are adopted
Collector and high pressure generation module, the fixed contact that the double-throw contact of described 3rd switching switch switchs with described second switching
Electrically connect or all electrically connect with described high pressure generation module, described contrast resistance, described second voltage collection circuit, the described 3rd
Switch the fixed contact of switch and be connected between described signal cable, described double-throw contact, described contrast resistance, described high pressure
Generation module and described controller are sequentially connected in series, described contrast resistance, described second voltage collection circuit and described control
Device is sequentially connected in series.
Further, described cable parameter tester over the ground also includes keyboard input module, described keyboard input module with
Described controller electrically connects, and described controller also electrically connects with described 3rd switching switch, and described keyboard input module is used for obtaining
Parameter to be measured is also transferred to described controller by the parameter to be measured that must input, and described controller is for according to the parameter to be measured obtained
Control the 3rd switching switch to switch over.
Further, described cable parameter tester over the ground also includes keyboard input module, described keyboard input module with
Described controller electrically connects, and described controller also electrically connects with each first switching switch of described resistance switching circuit, described
Keyboard input module is for obtaining the resistance value of input and resistance value being transferred to described controller, and described controller is used for foundation
The resistance value obtained controls one of them described first switching switch Guan Bi.
Further, described cable parameter tester over the ground also includes display module, described display module and described control
Device electrically connects, and described controller is for showing the output of described current value to described display module.
Further, described cable parameter tester over the ground also includes wire communication module and/or wireless communication module, institute
Stating wire communication module and/or wireless communication module to electrically connect with described controller, described controller is additionally operable to be had by described
Described current value is sent to an intelligent terminal by line communication module or described wireless communication module.
Further, described cable parameter tester over the ground also includes power supply changeover device and lightning protection device, described Power convert
Device electrically connects with described controller, described lightning protection device respectively.
Further, described cable parameter tester over the ground also includes that sky opens testing circuit, switch quantity acquisition circuit, described
Lightning protection device, described sky are driven testing circuit, described switch quantity acquisition circuit and described controller and are sequentially connected in series, and described sky opens detection
Circuit is for detecting the running status of described lightning protection device, and described switch quantity acquisition circuit is used for gathering described sky and opens testing circuit inspection
Running status is also transferred to described controller by the running status that measures, and described controller is for according to the running status detected
Output information.
Further, described cable parameter tester over the ground also includes alarm, described alarm and described controller electricity
Connecting, described controller is additionally operable to control when determining and converting the current value that obtains not in default current threshold scope described
Alarm equipment alarm.
Compared with prior art, a kind of cable parameter tester over the ground that this utility model provides, can be switched by resistance
First switching switch of circuit switches the current-limiting resistance of different resistance thus changes the electric current flowing through cable under test, in practical operation
During, the most one by one switching current-limiting resistance thus collect difference leakage current value over the ground, due to record to floor drain
Flow valuve is not suitable for again current current-limiting resistance being switched to the less current-limiting resistance of next stage in case producing after exceeding secure threshold
Fault, therefore takes first value of leakage current over the ground exceeding secure threshold as the leakage current value over the ground recorded, this record to floor drain
Flow valuve is closer to real leakage current value over the ground, thus the value of leakage current over the ground recorded is more accurate.
For making above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that retouched
The embodiment stated is a part of embodiment of this utility model rather than whole embodiments.Generally described in the accompanying drawing herein and
The assembly of this utility model embodiment illustrated can be arranged with various different configurations and design.Therefore, below to attached
The detailed description of the embodiment of the present utility model provided in figure is not intended to limit claimed scope of the present utility model,
But it is merely representative of selected embodiment of the present utility model.Based on the embodiment in this utility model, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, broadly falls into the model of this utility model protection
Enclose.
The cable parameter tester over the ground that Fig. 1 provides for this utility model preferred embodiment and relay assembly circuit and
The circuit of cable under test connects block diagram.
The structural representation of the resistance switching circuit that Fig. 2 provides for this utility model preferred embodiment.
Wherein, the corresponding relation between reference and component names is as follows: controller 101, resistance switching circuit 102,
Current collection circuit 103, current-limiting resistance 104, the first switching switch 105, the first voltage collection circuit 106, the second switching switch
107, the 3rd switching switch 108, contrast resistance 109, the second voltage collection circuit 110, high pressure generation module 111, key-press input
Module 112, display module 113, wire communication module 114, wireless communication module 115, power supply changeover device 116, transformator 117,
Sky opens testing circuit 118, switch quantity acquisition circuit 119, alarm 120, lightning protection device 121, and relay assembly circuit 122 is to be measured
Cable 123.
Detailed description of the invention
Below in conjunction with accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole realities
Execute example.Generally can be next with various different configurations with the assembly of this utility model embodiment illustrated described in accompanying drawing herein
Arrange and design.Therefore, below the detailed description of the embodiment of the present utility model provided in the accompanying drawings is not intended to limit
Claimed scope of the present utility model, but it is merely representative of selected embodiment of the present utility model.Based on this utility model
Embodiment, the every other embodiment that those skilled in the art are obtained on the premise of not making creative work, all
Belong to the scope of this utility model protection.
Insulating leakage current tester is used to the insulation against ground resistance testing signal cable and automatically surveys with a kind of of leakage current over the ground
Examination equipment.During test, send test command by computer and control insulating leakage current tester control relay assembly,
The signal cable needing test is selected to access insulation against ground test collecting cassette or the leakage current test over the ground of insulating leakage current tester
Collecting cassette, Insulation test collecting cassette or leakage current test collecting cassette collection insulation resistance signal or over the ground leakage current signal over the ground,
And by master controller according to insulation resistance signal or over the ground leakage current signal calculate insulating resistance value and leakage current value over the ground, then
By CAN by insulating resistance value and over the ground leakage current value upload to computer, thus user can be made to observe at computer
Cable parameter over the ground.Measuring over the ground during leakage current, owing to the value of leakage current over the ground of cable under test not can exceed that certain peace
Full threshold value (such as 20mA), it is therefore desirable to add current-limiting resistance and the electric current flowing through cable under test is carried out current limliting detect again, when
So, the value of leakage current over the ground of the least signal cable detected of current-limiting resistance is closer to real leakage current value over the ground.
When the value of leakage current over the ground of signal cable is acquired by insulating leakage current tester of the prior art, in order to avoid stream
The electric current crossing cable under test is excessive, uses bigger current-limiting resistance (such as 1k resistance) to carry out current limliting, then carries out leakage current over the ground and take
Sample gathers, and the resistance yet with current-limiting resistance is fixed, and causes test result to differ bigger with actual value.
In view of this, utility model people observes and research discovery through long-term, it is provided that a kind of cable parameter testing over the ground
Instrument, including controller, resistance switching circuit and current collection circuit, resistance switching circuit includes that at least two resistance is different
Current-limiting resistance and the identical with resistance quantity first switching switch, each current-limiting resistance and one first switching switch are all series at
Between current collection circuit and a cable under test, current collection circuit for will the current signal transfer that collect to controller,
Controller is for being converted into current value by the current signal of acquisition and exporting.This cable parameter tester over the ground record to floor drain
Flow valuve is closer to real leakage current value over the ground, thus the value of leakage current over the ground recorded is more accurate.
Below by specific embodiment and combine accompanying drawing this utility model is described in further detail.
Refer to Fig. 1, a kind of cable parameter tester over the ground that this utility model embodiment provides, including controller 101,
Power source protective module, over the ground leakage current voltage acquisition module, resistance to earth acquisition module and the 3rd switching switch 108.Power supply is protected
Protect module, over the ground leakage current voltage acquisition module, resistance to earth acquisition module all electrically connects with controller 101, the 3rd switching switch
The double-throw contact of 108 electrically connects with leakage current voltage acquisition module over the ground or resistance to earth acquisition module, consolidating of the 3rd contact switch
Fixed contact and an external relay assembly circuit 122 electrically connect, and relay assembly circuit 122 is used for connecing cable under test 123, and
And cable under test 123 can be switched over selection by relay assembly circuit 122.
Leakage current voltage acquisition module includes resistance switching circuit 102, current collection circuit the 103, first voltage acquisition over the ground
Circuit 106 and the second switching switch 107.As in figure 2 it is shown, resistance switching circuit 102 includes the current limliting electricity that five resistances are different
Resistance 104 and five first switching switches 105, wherein the resistance of five resistance be respectively 1K Ω, 560 Ω, 270 Ω, 120 Ω, 50
Ω, of course, in the present embodiment, number and resistance to the resistance that resistance switching circuit 102 includes all can be according to actual demands
Depending on, do not limit at this, and in the present embodiment, the second switching switch 107, the 3rd switching switch 108 and multiple the
One switching switch 105 all can use relay to replace.
Under normal circumstances, it is allowed to be 20mA by the maximum of cable under test 123 leakage current value over the ground, it is assumed that with current acquisition electricity
That road 103 connects is changeless resistance 1K Ω, and the value of leakage current over the ground measured is 15mA, although 15mA is the most right not less than maximum
Floor drain flow valuve 20mA, but owing to the resistance of 1K Ω is relatively big, thus record 15mA with the error of true leakage current value the most over the ground the most relatively
Greatly.Therefore the resistance switching circuit 102 current-limiting resistance to being serially connected with between current collection circuit 103 and cable under test 123 is used
104 switch over, and can get and allow the over the ground leakage current value less by the error of the maximum leakage current over the ground of cable under test 123.
For example, it is assumed that use 1K Ω, 560 Ω, 270 Ω, 120 Ω, 50 Ω, when record when being switched to front 4 current-limiting resistances 104, point
It is not 15mA, 17mA, 19mA, 25mA by the value of leakage current over the ground of cable under test 123, owing to 25mA has been above allowing to pass through
Maximum safety leakage current value the most over the ground, so 50 Ω can not be switched to again carry out leakage current value detection over the ground again, therefore using 25mA as
Record leakage current value over the ground, thus the value of leakage current over the ground obtained is less with the error of actual leakage current value over the ground.In the present embodiment, electric current
Acquisition Circuit the 103, first voltage collection circuit 106 can be integrated in same chip, it is of course also possible to be independently arranged, does not does at this
Limit.
Each current-limiting resistance 104 and one first switching switch 105 are all series at current collection circuit 103 and the second switching
Between switch 107, current collection circuit 103 is for using the current signal transfer collected to controller 101, controller 101
In the current signal of acquisition being converted into current value and exporting.The double-throw contact of the second switching switch 107 is used for connecting each electricity
The resistance of resistance switching circuit 102 or the first voltage collection circuit 106, the fixed contact of the second switching switch 107 and relay group
Close circuit 122 to connect.May select current collection circuit 103 by the second switching switch 107 and gather leakage current or the first electricity over the ground
Pressure Acquisition Circuit 106 gathers voltage-to-ground.
Resistance to earth acquisition module includes contrasting resistance the 109, second voltage collection circuit 110 and high pressure generation module
111, wherein the resistance of contrast resistance 109 is constant, and controller 101 is pre-stored with the resistance of contrast resistance 109.3rd switching is opened
Close 108 double-throw contact with second switching switch 107 fixed contact electrically connect or with high pressure generation module 111, contrast resistance
109, the second voltage collection circuit 110 all electrically connects.Leakage current voltage acquisition over the ground is connected by the 3rd switching switch 108 is optional
Module thus detect the leakage current over the ground of cable under test 123 or voltage-to-ground, resistance to earth acquisition module detection cable under test 123
Resistance to earth.3rd switching switchs the fixed contact of 108 and is connected between signal cable, double-throw contact, contrast resistance 109,
High pressure generation module 111 and controller 101 are sequentially connected in series, contrast resistance the 109, second voltage collection circuit 110 and control
Device 101 is sequentially connected in series.Controller 101 can control high pressure generation module 111 and produce high pressure unstable for 500V and add electricity to be measured to
Cable 123 and contrast resistance 109 two ends, the second voltage collection circuit 110 can gather voltage and the contrast electricity at cable under test 123 two ends
Hindering the voltage at the two ends of 109 and the voltage collected is transferred to controller 101, controller 101 is according to cable under test 123 two ends
Voltage, contrast resistance 109 two ends voltage and contrast resistance 109 computing the resistor value draw cable under test 123 over the ground
Resistance.
Power source protective module include transformator 117, power supply changeover device 116, lightning protection device 121, sky open testing circuit 118 and
Switch quantity acquisition circuit 119.Lightning protection device 121, transformator 117, power supply changeover device 116 and controller 101 are sequentially connected electrically, and become
220V alternating current power supply for external civil power and is converted to 8V and 20V alternating current power supply by depressor 117；Power supply changeover device 116 is used for will
Exchange 8V and 20V is converted to direct current 10V and direct current 24V power supply is that controller 101 is powered.Lightning protection device 121, sky open testing circuit
118, switch quantity acquisition circuit 119 and controller 101 are sequentially connected in series.Lightning protection device 121 be used for protecting power supply changeover device 116 not by
Thunder and lightning is broken, and sky opens testing circuit 118 for detecting the running status of lightning protection device 121, wherein, running status include " 0 " and
" 1 ", " 0 " represents fault, and " 1 " represents normal, and switch quantity acquisition circuit 119 opens what testing circuit 118 detected for gathering sky
Running status is also transferred to controller 101 by running status, and controller 101 is for according to the running status output prompting detected
Information.Such as, when running status is " 0 ", controller 101 exports the information of " breaking down ".
Cable parameter tester over the ground also include keyboard input module 112, display module 113, wire communication module 114,
Wireless communication module 115 and alarm 120, display module 113, keyboard input module 112 all electrically connect with controller 101,
Display module 113 can use the matrix liquid-crystal display screen of 160*160, display module 113 for the operation interface of display button with
And leakage current, voltage-to-ground, resistance to earth and various information over the ground.Controller 101 also with the first switching switch 105, the
Three switching switch 108 electrical connections, keyboard input module 112 is for obtaining the parameter to be measured of input and parameter to be measured being transferred to control
Device 101 processed, controller 101 is for switching over according to the state modulator to be measured 3rd switching switch 108 obtained.Such as, when with
The parameter to be measured of family input be over the ground leakage current or voltage-to-ground time, controller 101 controls the 3rd switching switch 108 and leakage current over the ground
Voltage acquisition module electrically connects；When the parameter to be measured of user's input is resistance to earth, controller 101 controls the 3rd switching switch
108 electrically connect with resistance to earth acquisition module, may be implemented in independent enter parameter to be measured of cable parameter tester over the ground and input
And realize switching, it is not necessary to the order that external computer sends is controlled, convenient and swift.Keyboard input module 112 is additionally operable to
Obtaining the resistance value of input and resistance value is transferred to controller 101, controller 101 is for controlling it according to the resistance value obtained
In one first switching switch 105 Guan Bi.Such as, user is 560 Ω, then controller in the resistance value of keyboard input module 112
101 control the first switching switch 105 Guan Bi connected with the current resistor that resistance value is 560 Ω, thus also may be implemented in cable
Parameter tester independently realizes the switching to current-limiting resistance 104 over the ground, and the order needing external computer to send is controlled, convenient
Fast.
Wire communication module 114, wireless communication module 115 all electrically connect with controller 101, and controller 101 is additionally operable to lead to
Cross wire communication module 114 or wireless communication module 115 send current value to an intelligent terminal and carried out by intelligent terminal
Display, wherein, wire communication module 114 is CAN, and wireless communication module 115 is WIFI module, and intelligent terminal is intelligence hands
Machine or computer.
Alarm 120 electrically connects with controller 101, and controller 101 is additionally operable to determining that to convert the current value that obtains big
When default current threshold scope, control alarm 120 report to the police.Specifically, when leakage current value over the ground is not at default current threshold
During scope, then the harness of explanation cable under test 123 is incorrect, thus alarm 120 occurs cue prompting work people
Member, thus facilitate staff to carry out school line, improve on-site maintenance efficiency.
To sum up, a kind of cable parameter tester over the ground that this utility model provides, can be by the of resistance switching circuit 102
One switching switch 105 switches the current-limiting resistance 104 of different resistance thus changes the electric current flowing through cable under test 123, grasps in reality
During work, switch current-limiting resistance 104 the most one by one thus collect difference leakage current value over the ground, due to right record
Floor drain flow valuve is not suitable for after exceeding secure threshold more current current-limiting resistance 104 being switched to the current-limiting resistance that next stage is less
104, in case producing fault, therefore take first value of leakage current over the ground exceeding secure threshold as the leakage current value over the ground recorded, this survey
The value of leakage current over the ground obtained is closer to real leakage current value the most over the ground, thus the value of leakage current over the ground recorded is more accurate.The most also have
Have 1, complete independently is set and controlled the transmission of order to cable to parameter to be measured；2, the electricity over the ground of cable under test 123 can be measured
Pressure；3, open testing circuit 118 and switch quantity acquisition circuit 119 by sky and can realize event when electric fuse over the ground or sky cut-off out
Barrier self-inspection；4, field wiring or the most correct function of harness can be detected.The design of this cable parameter tester over the ground is skilful
Wonderful, easy to implement, generalization is with practical.
In description of the present utility model, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " sets
Put ", should be interpreted broadly " installation ", " being connected ", " connection ", connect for example, it may be fixing, it is also possible to be to removably connect,
Or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to pass through intermediary
It is indirectly connected to, can be the connection of two element internals.For the ordinary skill in the art, can manage with concrete condition
Solve above-mentioned term concrete meaning in this utility model.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, or
It is the orientation or position relationship usually put during the use of this utility model product, is for only for ease of description this utility model and letter
Change describe rather than instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd " etc. are only used for district
Divide and describe, and it is not intended that indicate or hint relative importance.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this
For the technical staff in field, this utility model can have various modifications and variations.All in spirit of the present utility model and principle
Within, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.It should be noted that
Arrive: similar label and letter represent similar terms in following accompanying drawing, therefore, are determined in the most a certain Xiang Yi accompanying drawing
Justice, then need not define it further and explain in accompanying drawing subsequently.
Claims (10)
1. a cable parameter tester over the ground, it is characterised in that include controller, resistance switching circuit and current acquisition electricity
Road, described resistance switching circuit includes the current-limiting resistance and identical with described current-limiting resistance quantity that at least two resistance is different
One switching switch, each described current-limiting resistance and a described first switching switch are all series at described current collection circuit and
Between cable under test, the current signal transfer that described current collection circuit is used for collecting is to described controller, described control
Device is for being converted into current value by the current signal of acquisition and exporting.
Cable the most according to claim 1 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also including the first voltage collection circuit and the second switching switch, the double-throw contact of described second switching switch is used for connecting each
The resistance of described resistance switching circuit or described first voltage collection circuit, the fixed contact of described second switching switch is connected to
Between described cable under test and described double-throw contact.
Cable the most according to claim 2 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also include the 3rd switching switch, contrast resistance, the second voltage collection circuit and high pressure generation module, described 3rd switching switch
Double-throw contact electrically connect with the fixed contact of described second switching switch or electric with described high pressure generation module, described contrast
Resistance, described second voltage collection circuit all electrically connect, described 3rd switching switch fixed contact be connected to described electricity to be measured
Between cable, described double-throw contact, described contrast resistance, described high pressure generation module and described controller are sequentially connected in series, described
Contrast resistance, described second voltage collection circuit and described controller are sequentially connected in series.
Cable the most according to claim 3 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also including that keyboard input module, described keyboard input module electrically connect with described controller, described controller is also with the described 3rd
Switching switch electrical connection, described keyboard input module is for obtaining the parameter to be measured of input and parameter to be measured being transferred to described control
Device processed, described controller is for switching over according to the state modulator to be measured 3rd switching switch obtained.
Cable the most according to claim 1 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also include that keyboard input module, described keyboard input module electrically connect with described controller, described controller also with described resistance
Switching circuit each described first switching switch electrical connection, described keyboard input module for obtain input resistance value and by
Resistance value is transferred to described controller, and described controller for controlling one of them described first switching according to the resistance value obtained
Switch Guan Bi.
Cable the most according to claim 1 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also including that display module, described display module electrically connect with described controller, described controller is for exporting described current value
Show to described display module.
Cable the most according to claim 1 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also include wire communication module and/or wireless communication module, described wire communication module and/or wireless communication module and described control
Device processed electrically connects, and described controller is additionally operable to described current value by described wire communication module or described wireless communication module
Send to an intelligent terminal.
Cable the most according to claim 1 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also including power supply changeover device and lightning protection device, described power supply changeover device electrically connects with described controller, described lightning protection device respectively.
Cable the most according to claim 8 parameter tester over the ground, it is characterised in that described cable parameter tester over the ground
Also including that sky opens testing circuit, switch quantity acquisition circuit, described lightning protection device, described sky open testing circuit, described switch acquisition
Circuit and described controller are sequentially connected in series, and described sky opens testing circuit for detecting the running status of described lightning protection device, described
Switch quantity acquisition circuit is opened running status that testing circuit detects for gathering described sky and running status is transferred to described
Controller, described controller is for according to the running status output information detected.
Cable the most according to claim 1 parameter tester over the ground, it is characterised in that described cable parameter testing over the ground
Instrument also includes that alarm, described alarm electrically connect with described controller, and described controller is additionally operable to obtain determining conversion
Current value do not control described alarm equipment alarm when default current threshold scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620567258.4U CN205665317U (en) | 2016-06-12 | 2016-06-12 | Cable is to ground parameter testing appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620567258.4U CN205665317U (en) | 2016-06-12 | 2016-06-12 | Cable is to ground parameter testing appearance |
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| CN205665317U true CN205665317U (en) | 2016-10-26 |
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| CN201620567258.4U Active CN205665317U (en) | 2016-06-12 | 2016-06-12 | Cable is to ground parameter testing appearance |
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| CN107677934A (en) * | 2017-11-22 | 2018-02-09 | 中国工程物理研究院电子工程研究所 | A kind of cable tester and its method of testing based on Internet of Things |
| CN108037408A (en) * | 2017-12-05 | 2018-05-15 | 中国电力科学研究院有限公司 | A kind of system and method for detection cable conductor switching performance |
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| CN108519537A (en) * | 2018-03-01 | 2018-09-11 | 华南理工大学 | Leak electricity greatly flow calculation methodologies under a kind of cable metal sheath multipoint earthing |
| CN110133374A (en) * | 2018-02-09 | 2019-08-16 | 华为技术有限公司 | A kind of detection circuit and power supply circuit |
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