CN105866476A - Portable testing terminal - Google Patents
Portable testing terminal Download PDFInfo
- Publication number
- CN105866476A CN105866476A CN201610181517.4A CN201610181517A CN105866476A CN 105866476 A CN105866476 A CN 105866476A CN 201610181517 A CN201610181517 A CN 201610181517A CN 105866476 A CN105866476 A CN 105866476A
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- CN
- China
- Prior art keywords
- fixture
- bearing
- probe
- socket
- testing terminal
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06716—Elastic
- G01R1/06722—Spring-loaded
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06733—Geometry aspects
- G01R1/06738—Geometry aspects related to tip portion
Abstract
The invention provides a portable testing terminal and belongs to the technical field of terminal devices. The portable testing terminal includes a fixture, a supporting seat, sockets, probes and an auxiliary fastener. The supporting seat is an insulating workpiece. The sockets and the probes are individually conductors. The fixture is in fixed connection with the supporting seat which is provided with a plurality of sockets. One end of each socket is connected to probes. The fixture is symmetrical relative to the supporting seat. The fixture includes insulating bayonet parts each of which is fit to the shape of a sidewall of a terminal row, and also includes fixture arms each of which is connected to one insulating bayonet part. A front end part or a rear end part of the fixture is provided with the auxiliary fastener. According to the invention, the testing terminal, in conditions when original wiring is not removed from the terminal row, can be successfully added to a testing wiring and continues corresponding test, which saves time of secondary testing and increases safety of secondary testing.
Description
Technical field
The invention belongs to terminal device technical field, be specifically related to a kind of portable testing terminal.
Background technology
Terminal many fingers wiring terminal, is again binding post, and the effect mainly transmission signal of telecommunication or conduction are used.In engineering, it is the interface that engineering is reserved after engineering is station before station, is the pre-buried facility of station rear port engineering.When protection screen carries out wiring test; it is frequently encountered in terminal block, when adding test connection (especially voltage link), the situation not having testing terminal; now want to add voltage to be necessary for removing original voltage link; change contact pin to access voltage test line; original voltage link may be caused damage by this process; it is also possible to cause when reconnection the situation of virtual connection, the plenty of time can be wasted simultaneously.
The patent of Application No. 201510332203.5 discloses a kind of second protection testing terminal row's adapter; including hook-shaped hitch and chovr body; hook-shaped hitch includes upper frame, lower frame and nonrigid connector, and nonrigid connector two ends are connected with upper and lower support body elasticity respectively
；Upper frame is provided with chovr body installing hole, chovr body is arranged in the chovr body installing hole of upper frame, chovr body includes insulation shell, coupling and the grafting set being connected, insulation shell is provided with the spliced eye of up/down perforation, spliced eye internal upper part is provided with grafting set, bottom is provided with coupling, coupling lower end reaches beyond insulation shell, and grafting set and coupling are electric conductor, and are electrically connected to each other.This invention is when secondary circuit reaying protection test; without dismantling secondary line, not only operating efficiency is high, and circuit will not be caused damage; can effectively solve the repeated multiple times power supply trouble disconnecting the infringement that connection end is caused and mis-wired initiation of terminal block, operate with safety.It is stronger that this adapter is used in terminal block limitation, and in process of the test, electrical connection instability, also cannot meet the test connection operation of terminal block.
Summary of the invention
The technical problem to be solved is, for the deficiencies in the prior art, it is provided that a kind of portable, security is high, and overhaul efficiency is high, it is not necessary to takes out stitches and can be smoothed out the testing terminal of test connection.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
Portable testing terminal, including fixture, a bearing, socket, probe and assisted fasteners, described bearing is insulation product, described socket and probe are respectively electric conductor, described fixture is fixing with described bearing to be connected, if described bearing arranges stem socket, one end linking probe of described socket, described fixture is symmetrical about a bearing, described fixture includes the edge insulator oral area matched with terminal block sidewall shape and the snap arm being connected with described edge insulator oral area, and leading section or the rearward end of described fixture arrange assisted fasteners.
Further, described snap arm is tong-like, the thin-wall construction opened wide for side, and described snap arm has the auricle extended to this unlimited side, arranges torque spring between described auricle.
Further, described bearing is in " work " type, and the recess of both sides be enough to accommodate described auricle and torque spring, constitutes that the jag of described recess is fixing with described auricle to be connected.
Further, the rearward end of described snap arm is provided with through hole, and described assisted fasteners passes described through hole, the rearward end of described snap arm is connected.
Further, described snap arm includes connection post, connector I, connector II and the connector III fixed successively, described connection post is fixed with described bearing, and described connector III is connected with described edge insulator oral area, the longitudinally disposed through hole in outside of described edge insulator oral area.
Further, described connector II is spring leaf, two ends respectively with described connector I and connector III grafting.
Further, described assisted fasteners includes that U-shaped part and the end through described U-shaped part extend through the extension of described through hole, and described extension is vertical with described U-shaped part place plane, and the end of described extension has kink.
Further, described probe includes feeler lever and the probe being connected with described feeler lever, the outside coated insulation material of described feeler lever, and described probe is the gold-plated probe of band spring.
Further, described socket side is connected with described feeler lever, another lateral described bearing sunken inside 8 ~ 10 millimeters.
Compared with prior art, beneficial effects of the present invention is as follows:
The present invention passes through technique scheme, it is provided that a kind of portable, security is high, and overhaul efficiency is high, it is not necessary to takes out stitches and can be smoothed out the testing terminal of test connection；Its fixture being provided with, is used for fixing terminal block, is connected with a bearing simultaneously；The bearing being provided with, for fixture, socket is fixed thereon, connect for probe and test connection connects offer condition；The socket being provided with is for being connected probe with test connection, and socket and probe are electric conductor, both electrical connections；Probe is good with the electrical connection of terminal block, can bear bigger Current Voltage, and long-time energising does not haves fever phenomenon；Assisted fasteners, for being fixed further by fixture, provides conveniently for carrying simultaneously.
Combined by the connection of said structure, for in terms of physics is fixed, the bayonet part of fixture can firmly be stuck in terminal block, limited binding site bears bigger moment, ensure to loosen or binding site is subjected to displacement inserting not have after many test wires, overall structure consolidates, it is ensured that being smoothed out of test connection work；For in terms of electrical connection, it is electrically connected reliable and stable, in the present invention, the bayonet part being connected with terminal block is insulation product, and a bearing uses insulation product, the socket being fixed in a bearing is electric conductor with probe, it is electrically connected to each other, is electrically connected reliable and stable, do not have string electricity or loose contact phenomenon, and certain Current Voltage can be born, it is ensured that being smoothed out of test.
The portable testing terminal of the present invention can add test connection in the case of terminal block does not remove original wiring smoothly, continues corresponding test, saves the second trial time, improves second trial security；Can be widely applied in substation secondary service work, the notable shortening substation secondary service work time, improve security, in the long run, owing to using this device terminal block and connection cable will not be caused physical hazard, the electric power accident probability caused due to connection cable or terminal block strain can be significantly reduced.
Accompanying drawing explanation
The present invention is described in further detail below in conjunction with the accompanying drawings.
The structural representation of Fig. 1: the embodiment of the present invention 1；
The A-A sectional view of Fig. 2: Fig. 1 of the present invention；
The structural representation of Fig. 3: the embodiment of the present invention 2；
The structural representation of Fig. 4: the embodiment of the present invention 3；
Fig. 5: the side view of Fig. 4 of the present invention；
Fig. 6: the structural representation of the assisted fasteners of Fig. 4 of the present invention；
Fig. 7: the structural representation of probe of the present invention.
Detailed description of the invention
In order to be more fully understood that the present invention, fairly set out present disclosure below in conjunction with embodiment further, but the protection content of the present invention is not limited solely to the following examples.In the following description, a large amount of concrete details is given to provide more thorough understanding of the invention.It will be apparent, however, to one skilled in the art that the present invention can be carried out without these details one or more.
Embodiment 1
Refering to Fig. 1 ~ Fig. 2, portable testing terminal, including fixture 1, prop up bearing 2, socket 3, probe 4 and assisted fasteners 5, described bearing 2 is insulation product, described socket 3 and probe 4 are respectively electric conductor, described fixture 1 is fixing with described bearing 2 to be connected, if described bearing 2 arranges stem socket 3, one end linking probe 4 of described socket 3, described fixture 1 is symmetrical about a bearing 2, described fixture 1 includes the edge insulator oral area 1-1 matched with terminal block sidewall shape, and snap arm 1-2 being connected with described edge insulator oral area 1-1, leading section or the rearward end of described fixture 1 arrange assisted fasteners 5.
In this embodiment, a bearing 2 is provided with 4 sockets 3, accesses for test connection red, black, green, yellow respectively.
Probe 4 is the contact medium of electrical testing, and for accurate electronic devices and components, surface gold-plating, there is the high-performance spring of average life span 30,000 ~ 100,000 times inside.
The concrete shape of edge insulator oral area 1-1 is designed according to the side wall construction of terminal block, is advisable with firm clamping.
In the present embodiment, described snap arm 1-2 is tong-like, the thin-wall construction opened wide for side, and described snap arm 1-2 has the auricle 1-3 extended to this unlimited side, arranges torque spring 1-4 between described auricle 1-3.
Wherein, wearing pin 1-5 and fix between auricle 1-3 and torque spring 1-4, torque spring 1-4 props up snap arm 1-2 and bearing 2 simultaneously so that snap arm 1-2 can relative motion within the specific limits；When edge insulator oral area 1-1 card goes out terminal block, the front portion of snap arm 1-2 is opened, and torque spring 1-4 stress increases, and forces in snap arm 1-2 and a bearing 2, with by stabilized structure simultaneously.Snap arm 1-2 in this embodiment is integral type.
In the present embodiment, described bearing 2 is in " work " type, and the recess 2-1 of both sides be enough to accommodate described auricle 1-3 and torque spring 1-4, constitutes the jag 2-2 and described auricle 1-3 of described recess 2-1 and fixes and be connected.Refering to figure, the shape of a bearing 2 can be well adapted for itself and auricle 1-3 and the connection of torque spring 1-4, is arranged on by torque spring 1-4 in the recess 2-1 of a bearing 2, the not only placement space of economy system, and the performance of beneficially torque spring 1-4 effect.
In order to the structure making the portable testing terminal of the present invention is more firm, the rearward end in described snap arm 1-2 is provided with through hole, and the rearward end of described snap arm 1-2, through described through hole, is connected by described assisted fasteners 5.
The fixture being provided with in the present invention, is used for fixing terminal block, is connected with a bearing simultaneously；The bearing being provided with, for fixture, socket is fixed thereon, connect for probe and test connection connects offer condition；The socket being provided with is for being connected probe with test connection, and socket and probe are electric conductor, both electrical connections；Probe is good with the electrical connection of terminal block, can bear bigger Current Voltage, and long-time energising does not haves fever phenomenon；Assisted fasteners, for being fixed further by fixture, provides conveniently for carrying simultaneously.
Combined by the connection of said structure, for in terms of physics is fixed, the bayonet part of fixture can firmly be stuck in terminal block, limited binding site bears bigger moment, ensure to loosen or binding site is subjected to displacement inserting not have after many test wires, overall structure consolidates, it is ensured that being smoothed out of test connection work；For in terms of electrical connection, it is electrically connected reliable and stable, in the present invention, the bayonet part being connected with terminal block is insulation product, and a bearing uses insulation product, the socket being fixed in a bearing is electric conductor with probe, it is electrically connected to each other, is electrically connected reliable and stable, do not have string electricity or loose contact phenomenon, and certain Current Voltage can be born, it is ensured that being smoothed out of test.
Embodiment 2
Refering to Fig. 3, portable testing terminal described by the present embodiment, including fixture 1, prop up bearing 2, socket 3, probe 4 and assisted fasteners 5, described bearing 2 is insulation product, described socket 3 and probe 4 are respectively electric conductor, described fixture 1 is fixing with described bearing 2 to be connected, if described bearing 2 arranges stem socket 3, one end linking probe 4 of described socket 3, described fixture 1 is symmetrical about a bearing 2, described fixture 1 includes the edge insulator oral area 1-1 matched with terminal block sidewall shape, and snap arm 1-2 being connected with described edge insulator oral area 1-1, leading section or the rearward end of described fixture 1 arrange assisted fasteners 5, as different from Example 1:
Snap arm 1-2 includes connection post 1-21, connector I 1-22, connector II 1-23 and connector III 1-24 fixed successively, described connection post 1-21 fixes with described bearing 2, described connector III 1-24 is connected with described edge insulator oral area 1-1, the longitudinally disposed through hole in outside 6 of described edge insulator oral area 1-1.
Described connector II 1-23 is spring leaf, two ends respectively with described connector I 1-22 and connector III 1-24 grafting.
Spring leaf is also known as being heat-treated spring steel band, it is preferred to useStainless steel springSheet.The feature of spring leaf is, is only easily bent in a direction-minimum rigidity plane, and has big tensible rigidity and bending stiffness in the other directions.
In this embodiment, snap arm 1-2 is assembly type, is connected in sequence by connecting post 1-21, connector I 1-22, connector II 1-23 and connector III 1-24, connects post 1-21 and is integrally fixed in a bearing 2, connector II 1-23 is spring leaf, can meet opening of snap arm 1-2 certain amplitude.
Owing to connector II 1-23 is spring leaf, so that snap arm 1-2 is when operation, structure is more firm, and the present invention is longitudinally provided with through hole 6 in the outside of edge insulator oral area 1-1, fixes to be interspersed in assisted fasteners 5 wherein to carry out assisting.
Embodiment 3
Refering to Fig. 4 ~ Fig. 6, portable testing terminal described by the present embodiment, including fixture 1, prop up bearing 2, socket 3, probe 4 and assisted fasteners 5, described bearing 2 is insulation product, described socket 3 and probe 4 are respectively electric conductor, described fixture 1 is fixing with described bearing 2 to be connected, if described bearing 2 arranges stem socket 3, one end linking probe 4 of described socket 3, described fixture 1 is symmetrical about a bearing 2, described fixture 1 includes the edge insulator oral area 1-1 matched with terminal block sidewall shape, and snap arm 1-2 being connected with described edge insulator oral area 1-1, leading section or the rearward end of described fixture 1 arrange assisted fasteners 5, as different from Example 2:
It is vertical with described U-shaped part 5-1 place plane that described assisted fasteners 5 includes that U-shaped part 5-1 and the end through described U-shaped part 5-1 extend through the extension 5-2, described extension 5-2 of described through hole 6, and the end of described extension 5-2 has kink 5-3.
In the present embodiment, so that the operationally fixture 1 of the portable testing terminal described by embodiment 2 is more firm with the connection of terminal block, devising above-mentioned structure, fixture 1 can be clamped securely in terminal block by this structure.During making, this U-shaped part 5-1 is directed towards what snap arm 1-2 side was arranged, uses and in handling process, it is possible to play a protective role snap arm 1-2.
Embodiment 4
Refering to Fig. 7, portable testing terminal described by the present embodiment, including fixture 1, prop up bearing 2, socket 3, probe 4 and assisted fasteners 5, described bearing 2 is insulation product, described socket 3 and probe 4 are respectively electric conductor, described fixture 1 is fixing with described bearing 2 to be connected, if described bearing 2 arranges stem socket 3, one end linking probe 4 of described socket 3, described fixture 1 is symmetrical about a bearing 2, described fixture 1 includes the edge insulator oral area 1-1 matched with terminal block sidewall shape, and snap arm 1-2 being connected with described edge insulator oral area 1-1, leading section or the rearward end of described fixture 1 arrange assisted fasteners 5, unlike embodiment 1 ~ 3:
Described probe 4 includes feeler lever 4-1 and the probe 4-2 being connected with described feeler lever 4-1, and the outside coated insulation material layer 4-3, described probe 4-2 of described feeler lever 4-1 are the gold-plated probe 4-2 of band spring.This probe 4 is elastic strong, and is connected with agent structure and reliably does not loosens, and through long-term on-the-spot test, electric property is good, does not haves the situations such as string electricity or loose contact, and can bear bigger Current Voltage, and being energized for a long time does not haves the situations such as heating.
Described socket 3 side is connected with described feeler lever 4-1, another lateral described bearing 2 sunken inside 8 ~ 10 millimeters.The socket 3 adding test connection side caves inward 8 ~ 10 millimeters, is for the ease of electrical connection, accomplishes good insulation effect simultaneously, prevent operating personnel from touching electricity by mistake, more safe and reliable.
In this embodiment, described socket 3 is 4, is connected with test connection red, blue, green, black respectively.
Embodiment 5
Portable testing terminal described by the present embodiment, including fixture 1, prop up bearing 2, socket 3, probe 4 and assisted fasteners 5, described bearing 2 is insulation product, described socket 3 and probe 4 are respectively electric conductor, described fixture 1 is fixing with described bearing 2 to be connected, if described bearing 2 arranges stem socket 3, one end linking probe 4 of described socket 3, described fixture 1 is symmetrical about a bearing 2, described fixture 1 includes the edge insulator oral area 1-1 matched with terminal block sidewall shape, and snap arm 1-2 being connected with described edge insulator oral area 1-1, leading section or the rearward end of described fixture 1 arrange assisted fasteners 5, unlike embodiment 1 ~ 4:
Described bearing 2 is transparent organic glass product.In the present invention, a bearing 2 is owing to be connected with fixture 1, socket 3, and the intermediary element that socket 3 is electrical connection, in order to keep state of insulation, a bearing 2 is it is necessary that use insulating materials.Inventor is in numerous existing insulating materials, select to use transparent organic glass product, its transparency is good, chemical stability is strong, and mechanical property is good, it is often more important that use this transparent products, it is easily observed and prop up the element contact within bearing 2 and aging conditions, simultaneously during probe 4 is connected with terminal block, no matter what angle all it is easily observed docking progress from, it is possible to be effectively improved operating efficiency and operational security.
Finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, other amendment or equivalents that technical scheme is made by those of ordinary skill in the art, without departing from the spirit and scope of technical solution of the present invention, all should contain in the middle of scope of the presently claimed invention.
Claims (9)
- The most portable testing terminal, it is characterized in that: include fixture, a bearing, socket, probe and assisted fasteners, described bearing is insulation product, described socket and probe are respectively electric conductor, described fixture is fixing with described bearing to be connected, if described bearing arranges stem socket, one end linking probe of described socket, described fixture is symmetrical about a bearing, described fixture includes the edge insulator oral area matched with terminal block sidewall shape and the snap arm being connected with described edge insulator oral area, and leading section or the rearward end of described fixture arrange assisted fasteners.
- Portable testing terminal the most as claimed in claim 1, it is characterised in that: described snap arm is tong-like, the thin-wall construction opened wide for side, and described snap arm has the auricle extended to this unlimited side, arranges torque spring between described auricle.
- Portable testing terminal the most as claimed in claim 2, it is characterised in that: described bearing is in " work " type, and the recess of both sides be enough to accommodate described auricle and torque spring, constitutes that the jag of described recess is fixing with described auricle to be connected.
- Portable testing terminal the most as claimed in claim 3, it is characterised in that: the rearward end of described snap arm is provided with through hole, and described assisted fasteners passes described through hole, the rearward end of described snap arm is connected.
- Portable testing terminal the most as claimed in claim 1, it is characterized in that: described snap arm includes connection post, connector I, connector II and the connector III fixed successively, described connection post is fixed with described bearing, described connector III is connected with described edge insulator oral area, the longitudinally disposed through hole in outside of described edge insulator oral area.
- Portable testing terminal the most as claimed in claim 5, it is characterised in that: described connector II is spring leaf, two ends respectively with described connector I and connector III grafting.
- Portable testing terminal the most as claimed in claim 6, it is characterized in that: described assisted fasteners includes that U-shaped part and the end through described U-shaped part extend through the extension of described through hole, described extension is vertical with described U-shaped part place plane, and the end of described extension has kink.
- Portable testing terminal the most as claimed in claim 1, it is characterised in that: described probe includes feeler lever and the probe being connected with described feeler lever, the outside coated insulation material of described feeler lever, and described probe is the gold-plated probe of band spring.
- Portable testing terminal the most as claimed in claim 8, it is characterised in that: described socket side is connected with described feeler lever, another lateral described bearing sunken inside 8 ~ 10 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181517.4A CN105866476B (en) | 2016-03-28 | 2016-03-28 | Portable testing terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181517.4A CN105866476B (en) | 2016-03-28 | 2016-03-28 | Portable testing terminal |
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| Publication Number | Publication Date |
|---|---|
| CN105866476A true CN105866476A (en) | 2016-08-17 |
| CN105866476B CN105866476B (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610181517.4A Active CN105866476B (en) | 2016-03-28 | 2016-03-28 | Portable testing terminal |
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Cited By (9)
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| CN106990272A (en) * | 2017-04-11 | 2017-07-28 | 河南许继仪表有限公司 | A kind of portable electric attachment means |
| CN108646060A (en) * | 2018-04-21 | 2018-10-12 | 辽宁工程技术大学 | A kind of transmitting detection device of rf terminal |
| CN109655638A (en) * | 2018-11-28 | 2019-04-19 | 广东电网有限责任公司 | A kind of secondary terminals row test connection fixing device |
| CN110208728A (en) * | 2019-06-21 | 2019-09-06 | 国网福建省电力有限公司 | Assembly line examines and determine general meter adapting-seat and its application method |
| CN110672953A (en) * | 2019-10-11 | 2020-01-10 | 深圳供电局有限公司 | Secondary voltage extraction device |
| CN110763875A (en) * | 2019-08-05 | 2020-02-07 | 国网内蒙古东部电力有限公司电力科学研究院 | Design method of voltage test connector |
| CN110907668A (en) * | 2019-11-29 | 2020-03-24 | 国网天津市电力公司电力科学研究院 | Protection device for signal input connector of laboratory |
| CN113030833A (en) * | 2021-04-16 | 2021-06-25 | 国网新疆电力有限公司喀什供电公司 | Mutual inductor detection quick connector |
| CN113805137A (en) * | 2021-08-05 | 2021-12-17 | 国网浙江杭州市临安区供电有限公司 | Calibration device for calibrating electric energy meter |
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| CN110907668A (en) * | 2019-11-29 | 2020-03-24 | 国网天津市电力公司电力科学研究院 | Protection device for signal input connector of laboratory |
| CN113030833A (en) * | 2021-04-16 | 2021-06-25 | 国网新疆电力有限公司喀什供电公司 | Mutual inductor detection quick connector |
| CN113030833B (en) * | 2021-04-16 | 2024-01-30 | 国网新疆电力有限公司喀什供电公司 | Quick connector for detecting mutual inductor |
| CN113805137A (en) * | 2021-08-05 | 2021-12-17 | 国网浙江杭州市临安区供电有限公司 | Calibration device for calibrating electric energy meter |
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| CN105866476B (en) | 2019-04-26 |
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