CN103048566B - High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment - Google Patents

High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment Download PDF

Info

Publication number
CN103048566B
CN103048566B CN201210559170.4A CN201210559170A CN103048566B CN 103048566 B CN103048566 B CN 103048566B CN 201210559170 A CN201210559170 A CN 201210559170A CN 103048566 B CN103048566 B CN 103048566B
Authority
CN
China
Prior art keywords
insulator
test side
meter pen
intelligent
magnetic meter
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
CN201210559170.4A
Other languages
Chinese (zh)
Other versions
CN103048566A (en
Inventor
郭志广
李红旗
曹向勇
秦源汛
赵爽
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.)
Beijing Guowang Fuda Technology Development Co Ltd
Original Assignee
Beijing Guowang Fuda Technology Development Co Ltd
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 Beijing Guowang Fuda Technology Development Co Ltd filed Critical Beijing Guowang Fuda Technology Development Co Ltd
Priority to CN201210559170.4A priority Critical patent/CN103048566B/en
Publication of CN103048566A publication Critical patent/CN103048566A/en
Application granted granted Critical
Publication of CN103048566B publication Critical patent/CN103048566B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention provides a kind of high-voltage intelligent magnetic meter pen, have the test side and inserted terminal that are connected by bent bundle conductor, wherein inserted terminal is plugged in the corresponding interface of insulator intelligent detecting instrument, is provided with one in order to adsorb the magnetic part of element to be detected in test side.By using soft bent test pencil wire, and be provided with magnetic part in test pencil test side, make in detection operation process, after test pencil test side only need be adsorbed in insulator by operating personnel, again detector is put into pocket, so just can vacate both hands to help fixture, ensure operating personnel's safety; Secondly, magnetive attraction effect makes test pencil test side more tight reliable with contacting of insulator, considerably reduces the generation of loose contact, makes detector measurement result more accurately and reliably.In addition, the present invention also provides a kind of insulator intelligent detection equipment, has an insulator intelligent detecting instrument, and two input end is plugged with high-voltage intelligent magnetic meter pen as above respectively.

Description

High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment
Technical field
The invention relates to a kind of high-tension bus-bar checkout equipment, refer in particular to a kind of high-voltage intelligent magnetic meter pen and apply the insulator intelligent detection equipment of this test pencil.
Background technology
Along with the further enforcement that national intelligent grid is planned, UHV transmission line plays a part key to national intelligent grid construction, part indispensable in also just having become UHV transmission line normally to run for the repair based on condition of component of UHV transmission line.Wherein, transmission line of electricity has the insulator being used for fixing conductor, and insulator is the vitals making conductor keep electric property, so most important to the periodic detection of insulator, is the essential step of UHV transmission line repair based on condition of component.
At present, the intelligent checkout equipment of insulator of domestic ultrahigh voltage alternating current transmission lines is less, existing checkout equipment as shown in Figure 1, there is a UHV transmission line insulator intelligent detecting instrument 9 (patent No. is: CN201120449131.X), the parallel steel bar test pencil 91 that two diameters are 2-3mm is leant out from intelligent detecting instrument 9, during measurement, operating personnel's hands grasping intelligent movable detector 9, make the two ends of the steel cap 81 of the test side difference connect insulator 8 of two steel bar test pencils 91, in order to detect insulator physical characteristics.
But in actual measurement operation process, adopt above-mentioned equipment Inspection insulator still to there is following problem:
1. the two ends of the steel cap of insulator are cylindrical structure (as Fig. 1), when it contacts with the test side of steel bar test pencil, be only linear contact lay even point cantact, cause contact area less, easy loose contact, again because intelligent detecting instrument is that operating personnel is hand-held, when hand has shake, just further increase the incidence of loose contact situation, finally make measurement result inaccurate;
2., in measuring process, because testing carries out in high-altitude, and operating personnel needs two hands to hold checkout equipment simultaneously, has to fix health with both feet, operating personnel is easily fallen from high altitude, there is very big potential safety hazard;
3. because insulator becomes string-like, axial dimension is longer, in measuring process, need the hand-held checkout equipment of operating personnel constantly movement to carry out the detection of each section of insulator, and in the detection of every section, need again the test side of two steel bar test pencils and the careful contraposition of insulator are fitted, so complicated operating process, cause detection efficiency low, a large amount of testing cannot be completed on schedule;
4. intelligent detecting instrument after powered up, and namely test pencil test side has high pressure, if now operating personnel touches test side because of carelessness, then causes most probably getting an electric shock, cause personal injury.
In above-mentioned situation, the lighter's insulator measures inaccurate, inefficiency, and severe one operating personnel is injured, so be badly in need of improveing the checkout equipment of prior art.And the present inventor is according to its working experience in the industry for many years, adopts the new test pencil of design to connect the combination of existing detector, overcome the problems referred to above.
Summary of the invention
For overcoming a series of serious problems described in background technology, the object of the present invention is to provide a kind of high-voltage intelligent magnetic meter pen, soft test pencil wire is replaced by by the steel bar test pencil of the hard by prior art, and in test pencil test side, be provided with magnetic part to adsorb insulator, the both hands of operating personnel are not only liberated to help fixture, ensure operating personnel's safety, but also make test pencil test side more tight reliable with contacting of insulator by magnetive attraction effect, considerably reduce the generation of loose contact, make detector measurement result more accurately and reliably.
The object of the invention described above is realized by following technical scheme:
A kind of high-voltage intelligent magnetic meter pen, there is the test side and inserted terminal that are connected by conductor, wherein inserted terminal is plugged in the corresponding interface of insulator intelligent detecting instrument, the test side of described high-voltage intelligent magnetic meter pen is connected by bent bundle conductor with inserted terminal, and is provided with one in this test side in order to adsorb the magnetic part of element to be detected.As shown in Figures 2 and 3.By using soft bent test pencil wire, and be provided with magnetic part in test pencil test side, make in detection operation process, after test pencil test side only need be adsorbed in insulator by operating personnel, again detector is put into pocket, so just can vacate both hands to help fixture, ensure operating personnel's safety; Secondly, magnetive attraction effect makes test pencil test side more tight reliable with contacting of insulator, considerably reduces the generation of loose contact, makes detector measurement result more accurately and reliably.
The magnetic part of the test side of high-voltage intelligent magnetic meter pen as above is coated with side for connect insulator, opposite side for being electrically connected the metal shell of described bundle conductor, and metal shell is also coated with the rubber sleeve of insulation outward.As shown in Figure 3.Adopt after magnetic part is located at test side, when test side absorption insulator, because of magneticaction, test side can be clashed into insulator, if make magnetic part directly clash into connect insulator, is easy to cause that magnetic part is cracked to be scrapped.So at magnetic part outer cladding metal shell, make metal shell on behalf of bearing impact, and bear the role of conductor, just protect magnetic part, make it not easily crash, extend the serviceable life of magnetic part.And overcoat rubber sleeve ensures that operating personnel does not directly touch metalwork, avoid Danger Electric shock risk.
The magnetic part of high-voltage intelligent magnetic meter pen test side as above is a ring-shaped magnet, and the axis of ring-shaped magnet is positioned at described bundle conductor towards on the extension line of this test side.As shown in Figure 3.Whereby, make magnetic attraction can be perpendicular with the surface in contact of test pencil test side and insulator, make absorption more reliable and stable, be unlikely to test pencil in operation process and drop.
High-voltage intelligent magnetic meter pen as above is also provided with one and can is communicated with according to light intensity or disconnects the light activated switch device of test pencil circuit, and described light activated switch device has the light sensor being arranged at described magnetic meter pen test side, the photosensor signal line setting up the modulus conversion chip in described insulator intelligent detecting instrument, the photosensitive control circuit be connected with modulus conversion chip and the connection light sensor be arranged in described bundle conductor and modulus conversion chip.By arranging light activated switch device, by the light sensation of test side, make test pencil only with (in test side, light is dark) during insulator good contact, 5000V high pressure could be exported; After test pencil leaves insulator (in test side, light is strong), test pencil circuit disconnects.So just can prevent staff from getting an electric shock, protect their personal safety.
The metal shell of the test side of high-voltage intelligent magnetic meter pen as above has the hollow bulb of the mesopore of a through described ring-shaped magnet of correspondence, be provided with described light sensor in this hollow bulb, the photosensitive end of light sensor is along the axis of described ring-shaped magnet towards outside test side; Described bundle conductor has the detection electric wire wire parallel and non-interference with two, photosensor signal line, and wherein photosensor signal line has electrode line and negative line, and the both positive and negative polarity of the output terminal of described light sensor is connected in this electrode line and negative line.By the photosensitive end of light sensor towards outside test side, the light achieving test side incident light dependent sensor when connect insulator dies down; And after leaving insulator, the light grow of incident light dependent sensor.And be passed to along bundle conductor the process that insulator intelligent detecting instrument carries out test pencil circuit communication or disconnection by being exported by the signal of light sensor.
High-voltage intelligent magnetic meter pen as above, described light activated switch device is also provided with a transparent insulation shell in the hollow bulb of this metal shell, at the outer circumferential side of the photosensitive end of light sensor.Whereby, light sensor is made by ring-shaped magnet and metal shell short circuit, to avoid extraneous forceful electric power to disturb; Insulation shell is that transparent material ensures its light transmission simultaneously.
The rubber sleeve of the test side of high-voltage intelligent magnetic meter pen as above extends towards the axis direction one of ring-shaped magnet described in outer, test side and is provided with one and can stops that when described metal shell contacts with described insulator light injects the flexible light shield of described light sensor.Whereby, when test side connect insulator, light shield is resisted against on insulator, the opening of test side is jointly sealed with insulator surface, make extraneous light cannot inject light sensor in test side, make light sensor more effective to the detection of light, ensure that light activated switch device is more reliable to the control of test pencil circuit.
High-voltage intelligent magnetic meter pen as above, described bundle conductor has insulated hull, there is in insulated hull the photosensitive line screen layer of coated described photosensor signal line and the hi-line screen layer of coated described detection electric wire, wherein photosensitive line screen layer is the netted body of metal material, and hi-line screen layer is insulator.Whereby, the photosensor signal line of light current and the detection electric wire of forceful electric power are not interfere with each other, more ensures light-operated validity and checkout equipment operation stability.
The present invention also provides a kind of insulator intelligent detection equipment, has an insulator intelligent detecting instrument, and two input end is plugged with high-voltage intelligent magnetic meter pen as above respectively.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the intelligent checkout equipment of insulator of prior art;
Fig. 2 is the overall schematic of insulator intelligent detection equipment of the present invention;
Fig. 3 is the sectional view of the test side of high-voltage intelligent magnetic meter pen of the present invention;
Fig. 4 is the longitudinal section of the bundle conductor of high-voltage intelligent magnetic meter pen of the present invention;
Fig. 5 is the circuit diagram of light activated switch device of the present invention.
Embodiment
For making object of the present invention, technological means and technique effect have more complete and clearly disclose, being below described in detail, and seeing also accompanying drawing and part numbers.
Refer to shown in Fig. 2 and Fig. 3, the invention provides a kind of high-voltage intelligent magnetic meter pen, there is the test side 1 and inserted terminal 2 that are connected by conductor, wherein inserted terminal 2 is plugged in the corresponding interface of insulator intelligent detecting instrument 9, the test side 1 of described high-voltage intelligent magnetic meter pen is connected by bent bundle conductor 3 with inserted terminal 2, and is provided with one in this test side 1 in order to adsorb the magnetic part of element to be detected.
As shown in Figure 3, the magnetic part of test side 1 is coated with side for connect insulator 8, opposite side for the metal shell 12 of electrical connecting wire bundle 3, the outer rubber sleeve 13 being also coated with insulation of metal shell 12.Metal shell is used for crashproof, but the present invention also can not arrange metal shell, and adopts the magnetic part material not easily crashed.
Further, magnetic part is a ring-shaped magnet 11, and the axis of ring-shaped magnet 11 is positioned at described bundle conductor 3 towards on the extension line of this test side 1.But the present invention is not as limit, magnetic part adopts other materials, other shapes also for feasible; Ring-shaped magnet 11 is adopted to be in order to hole place holds light sensor 41 hereinafter described wherein.
See also shown in Fig. 3-Fig. 5, high-voltage intelligent magnetic meter pen of the present invention is also provided with one and can is communicated with according to light intensity or disconnects the light activated switch device of test pencil circuit, and described light activated switch device has the photosensor signal line 43 of the light sensor 41 being arranged at described magnetic meter pen test side 1, the modulus conversion chip 42 set up in described insulator intelligent detecting instrument 9, the photosensitive control circuit be connected with modulus conversion chip 42 and the connection light sensor 41 be arranged in described bundle conductor 3 and modulus conversion chip 42.
Further, the metal shell 12 of test side 1 has the hollow bulb 120 of the mesopore of a through described ring-shaped magnet 11 of correspondence, be provided with described light sensor 41 in this hollow bulb 120, the photosensitive end 410 of light sensor 41 is along the axis of described ring-shaped magnet 11 towards outside test side 1; Described bundle conductor 3 has detection electric wire 31 wire parallel and non-interference with 43 two, photosensor signal line, wherein photosensor signal line 43 has electrode line 431 and negative line 432 (as Fig. 4), and the both positive and negative polarity of the output terminal 412 of light sensor 41 is connected in this electrode line 431 and negative line 432.
Referring again to Fig. 3, described light activated switch device is also provided with a transparent insulation shell 44 in the hollow bulb 410 of metal shell 12, at the outer circumferential side of the photosensitive end 410 of light sensor 41.Insulation shell 44 can be whole clearing or is only set to, in the planar transparent at photosensitive end 410 place, as long as can make the photosensitive end 410 of light incident light dependent sensor 41, just be feasible embodiment.
Further, the rubber sleeve 13 of test side 1 extends towards the axis direction one of ring-shaped magnet 11 described in outer, test side 1 and is provided with one and can stops that when described metal shell 12 contacts with described insulator 8 light injects the flexible light shield 131 of described light sensor 41.Light shield 131 can be arranged to circular tooth shape body as shown in Figure 3, is beneficial to folding and does not affect the contact of metal shell 12 and insulator 8, but also can be set to other shapes, not enumerating at this.
Shown in Fig. 4, bundle conductor 3 has insulated hull 30, there is in insulated hull 30 the photosensitive line screen layer 33 of coated described photosensor signal line 43 and the hi-line screen layer 32 of coated described detection electric wire 31, wherein photosensitive line screen layer 33 is the netted body of metal material, and hi-line screen layer 32 is insulator.
The present invention also provides a kind of insulator intelligent detection equipment, has an insulator intelligent detecting instrument, and two input end is plugged with high-voltage intelligent magnetic meter pen as above respectively.
Light sensor of the present invention is high-performance optical dependent sensor, GM series or the EKPS series of light sensitive sensor of Xin Lijia company can be selected, and modulus conversion chip can adopt the SN74AHC1G08 chip of Texas Instruments company, certainly, not as limit.
Refer to Fig. 5, disclose the circuit connecting relation of the light activated switch device of insulator intelligent detection equipment of the present invention.In figure, the chip on right side is modulus conversion chip 42, pin A and the pin B of this chip are connected the electrode line 431 of the photosensor signal line 43 of first and second high-voltage intelligent magnetic meter pen respectively, and pin GND connects the negative line 432 of the photosensor signal line 43 of first and second high-voltage intelligent magnetic meter pen, wherein, the simulating signal that pin A with B contacts with insulator for detecting test pencil, voltage higher expression contact is better, and this modulus conversion chip 42 passes through A, the input of B pin is converted to digital signal to improve the antijamming capability of system, and carry out voltage judgement from the connecting circuit that pin Y exports to insulator intelligent detecting instrument, when the output of pin Y is high level (>2.4V) and pin A, when the voltage of B is greater than 2.4V simultaneously, think test pencil and insulator good contact, test pencil circuit can be started by detecting electric wire 31 to test side 1 power transmission, otherwise, disconnect test pencil circuit, so can realize being communicated with according to light intensity or disconnecting the function of test pencil circuit.
Below for preferred embodiment of the present invention, principle of work of the present invention is described:
First it is firm to be connected with the corresponding interface of the sub-detector of Intelligent insulation by the inserted terminal (i.e. three-wire system plug) of the present invention's two high-voltage intelligent magnetic meter pens, then test pencil test side is adsorbed onto respectively the two ends of insulator, before adsorbing completely, test pencil circuit no power; After the test side of two root table pens is adsorbed onto A1 and the A2 place of insulator as shown in Figure 2 respectively, the sub-detector of Intelligent insulation starts high pressure and carries out insulator measurement, after measurement completes, automatically operating personnel is notified, then, operating personnel only needs the test pencil being positioned at insulator A1 point to be adsorbed onto insulator A3 point single stepping, and insulator intelligent detection equipment of the present invention just can continue the physical characteristics measuring next section of insulator automatically, by that analogy, until complete the surveying work of all insulators.
The present invention may be used for various UHV (ultra-high voltage) in electric system, high pressure, low tension equipment Inspection, as long as measured target can be adsorbed by magnetic part, just can use.Therefore, have a extensive future, there is huge economic benefit.
Above act is only the schematic section Example of the present invention; and be not used to limit the scope of the invention; any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should be included within this patent protection domain.

Claims (5)

1. a high-voltage intelligent magnetic meter pen, there is the test side and inserted terminal that are connected by conductor, wherein inserted terminal is plugged in the corresponding interface of insulator intelligent detecting instrument, it is characterized in that, the test side of described high-voltage intelligent magnetic meter pen is connected by bent bundle conductor with inserted terminal, and is provided with one in this test side in order to adsorb the magnetic part of element to be detected; The magnetic part of the test side of described magnetic meter pen is coated with side for connect insulator, opposite side for being electrically connected the metal shell of described bundle conductor, and metal shell is also coated with the rubber sleeve of insulation outward; The magnetic part of described magnetic meter pen test side is a ring-shaped magnet, and the axis of ring-shaped magnet is positioned at described bundle conductor towards on the extension line of this test side; Described magnetic meter pen is also provided with one and can is communicated with according to light intensity or disconnects the light activated switch device of test pencil circuit, and described light activated switch device has the light sensor being arranged at described magnetic meter pen test side, the photosensor signal line setting up the modulus conversion chip in described insulator intelligent detecting instrument, the photosensitive control circuit be connected with modulus conversion chip and the connection light sensor be arranged in described bundle conductor and modulus conversion chip; The metal shell of described magnetic meter pen test side has the hollow bulb of the mesopore of a through described ring-shaped magnet of correspondence, is provided with described light sensor in this hollow bulb, and the photosensitive end of light sensor is along the axis of described ring-shaped magnet towards outside test side; Described bundle conductor has the detection electric wire wire parallel and non-interference with two, photosensor signal line, and wherein photosensor signal line has electrode line and negative line, and the both positive and negative polarity of the output terminal of described light sensor is connected in this electrode line and negative line.
2. high-voltage intelligent magnetic meter pen according to claim 1, is characterized in that, described light activated switch device is also provided with a transparent insulation shell in the hollow bulb of this metal shell, at the outer circumferential side of the photosensitive end of light sensor.
3. high-voltage intelligent magnetic meter pen according to claim 1, it is characterized in that, the rubber sleeve of described magnetic meter pen test side extends towards the axis direction one of ring-shaped magnet described in outer, test side and is provided with one and can stops that when described metal shell contacts with described insulator light injects the flexible light shield of described light sensor.
4. high-voltage intelligent magnetic meter pen according to claim 1, it is characterized in that, described bundle conductor has insulated hull, there is in insulated hull the photosensitive line screen layer of coated described photosensor signal line and the hi-line screen layer of coated described detection electric wire, wherein photosensitive line screen layer is the netted body of metal material, and hi-line screen layer is insulator.
5. an insulator intelligent detection equipment, has an insulator intelligent detecting instrument, it is characterized in that, two input ends of described insulator intelligent detecting instrument are plugged with high-voltage intelligent magnetic meter pen as claimed in claim 1 respectively.
CN201210559170.4A 2012-12-20 2012-12-20 High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment Active CN103048566B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210559170.4A CN103048566B (en) 2012-12-20 2012-12-20 High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210559170.4A CN103048566B (en) 2012-12-20 2012-12-20 High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment

Publications (2)

Publication Number Publication Date
CN103048566A CN103048566A (en) 2013-04-17
CN103048566B true CN103048566B (en) 2015-08-19

Family

ID=48061275

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210559170.4A Active CN103048566B (en) 2012-12-20 2012-12-20 High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment

Country Status (1)

Country Link
CN (1) CN103048566B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111693830B (en) * 2020-05-28 2023-02-28 广州广华智电科技有限公司 Insulator on-line detection equipment and system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08178984A (en) * 1994-12-21 1996-07-12 Nec Corp Current probe
CN2775667Y (en) * 2005-03-29 2006-04-26 武汉大学 Magnetic meter pen
CN2879194Y (en) * 2005-08-11 2007-03-14 杜红日 Test collecting components matched with portable testing meter
CN201083763Y (en) * 2007-06-21 2008-07-09 苏州和普激光设备开发有限公司 Multipurpose type resistance-adjusting test probe
CN202331382U (en) * 2011-11-08 2012-07-11 南京芒冠光电科技股份有限公司 Contact electronic stylus
CN202362384U (en) * 2011-11-14 2012-08-01 河南送变电建设公司 Extra-high voltage insulator detector
CN202384575U (en) * 2011-12-21 2012-08-15 东莞中探探针有限公司 Magnetic electronic connector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08178984A (en) * 1994-12-21 1996-07-12 Nec Corp Current probe
CN2775667Y (en) * 2005-03-29 2006-04-26 武汉大学 Magnetic meter pen
CN2879194Y (en) * 2005-08-11 2007-03-14 杜红日 Test collecting components matched with portable testing meter
CN201083763Y (en) * 2007-06-21 2008-07-09 苏州和普激光设备开发有限公司 Multipurpose type resistance-adjusting test probe
CN202331382U (en) * 2011-11-08 2012-07-11 南京芒冠光电科技股份有限公司 Contact electronic stylus
CN202362384U (en) * 2011-11-14 2012-08-01 河南送变电建设公司 Extra-high voltage insulator detector
CN202384575U (en) * 2011-12-21 2012-08-15 东莞中探探针有限公司 Magnetic electronic connector

Also Published As

Publication number Publication date
CN103048566A (en) 2013-04-17

Similar Documents

Publication Publication Date Title
CN202738876U (en) Multipurpose electrician gloves
CN203084100U (en) High-voltage telescopic intelligent magnetic meter pen and insulator intelligent detecting equipment
CN203658476U (en) High-voltage phase-checking device
CN103048566B (en) High-voltage intelligent magnetic meter pen and insulator intelligent detection equipment
CN203672957U (en) Non-contact test pencil
CN208255276U (en) A kind of battery Special pressure measuring protection box
CN103048565B (en) The scalable intelligent magnetic test pencil of high pressure and insulator intelligent detection equipment
CN212483807U (en) Telescopic arrester resistive current test rod
CN203084099U (en) High-voltage intelligent magnetic meter pen and insulator intelligent detecting equipment
CN103983831A (en) Voltmeter and voltmeter pen special for protecting pressure plate
CN106291267B (en) The electrical property test instrument of spacecraft thermal test multicore cable
CN201289396Y (en) Apparatus for measuring water temperature and water level of solar water heater
CN111239445A (en) Telescopic multimeter test pen
CN207924008U (en) A kind of electroscope with contact detection
CN201828582U (en) Novel test meter pen
CN204359857U (en) A kind of multifunction test pencil
CN207908553U (en) A kind of retractable needle test pencil
CN209014641U (en) A kind of building detection hand held polylinker voltage test pencil
CN203396930U (en) Shielding device for surface resistance tester
CN110376423A (en) A kind of electric power apparatus examination high voltage electroscope
CN205450091U (en) Electric auxiliary device is tested to test pencil
CN216285425U (en) Digital multimeter pen head
CN205384321U (en) Simple and easy ground resistance tester
CN203883279U (en) Safe power line for electrical appliance detection
CN210863869U (en) Lengthened flexible low-voltage test pencil

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant