CN114325538A - Portable multipurpose wiring device and method - Google Patents

Portable multipurpose wiring device and method Download PDF

Info

Publication number
CN114325538A
CN114325538A CN202111681429.8A CN202111681429A CN114325538A CN 114325538 A CN114325538 A CN 114325538A CN 202111681429 A CN202111681429 A CN 202111681429A CN 114325538 A CN114325538 A CN 114325538A
Authority
CN
China
Prior art keywords
locking mechanism
power supply
electric signal
negative
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.)
Pending
Application number
CN202111681429.8A
Other languages
Chinese (zh)
Inventor
周凡淞
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.)
AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Original Assignee
AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
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 AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems filed Critical AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority to CN202111681429.8A priority Critical patent/CN114325538A/en
Publication of CN114325538A publication Critical patent/CN114325538A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Switch Cases, Indication, And Locking (AREA)

Abstract

The invention discloses a portable multipurpose wiring device and a method, the device comprises a shell, a power supply positive electrode wiring end, a power supply negative electrode wiring end, an electric signal positive electrode wiring end, an electric signal negative electrode wiring end, a power supply positive electrode locking mechanism, a power supply negative electrode locking mechanism, an electric signal positive electrode locking mechanism, an electric signal negative electrode locking mechanism, an on-off mechanism I and an on-off mechanism II. The protective performance is good, the installation and the disassembly are simple, the sensors of various models can be rapidly switched through the on-off mechanism, the wiring efficiency is greatly improved, the stability of electrical connection is ensured, and meanwhile, the working efficiency is improved.

Description

Portable multipurpose wiring device and method
Technical Field
The invention belongs to the technical field of electrical measurement, and relates to a portable multipurpose wiring device and a method.
Technical Field
Because the existing sensors have various models and different wiring methods, and the frequent wiring and wire changing during the metrological verification and calibration of the sensors with different models directly increases the error rate. The sensor is at the metrological verification, before the calibration, the power supply and the output signal end of sensor need reliably be connected with constant voltage power supply and digital multimeter respectively, and supply power through constant voltage power supply, digital multimeter acquisition signal, in order to carry out sensor metrological verification, calibration work, traditional mode of connection is connected with sensor power supply and output signal end through a plurality of fish mouth fastener, because all build temporarily at every turn, wiring inefficiency and circuit are in a jumble, frequent line change also leads to the error rate high, the reliability is low, and the easy collision of wire link causes the problem of short circuit, make work unable go on, cause the damage of components and parts, damage standard utensil even.
Technical scheme
The purpose of the invention is as follows: the utility model provides a portable multipurpose termination and method, solve traditional mode of connection and be connected with sensor power supply and output signal end through a plurality of fish mouth fastener, because all build temporarily at every turn, wiring inefficiency and circuit are mixed and disorderly, frequent line change also leads to the error rate high, the reliability is low, and the problem of wire link end short circuit that causes of easy collision moreover.
The technical scheme of the invention is as follows:
a portable multipurpose wiring device comprises a shell 11, a power supply positive terminal 1, a power supply negative terminal 2, an electric signal positive terminal 3, an electric signal negative terminal 4, a power supply positive locking mechanism 5, a power supply negative locking mechanism 6, an electric signal positive locking mechanism 7, an electric signal negative locking mechanism 8, a first on-off mechanism 9 and a second on-off mechanism 10; the power supply comprises a power supply positive terminal 1, a power supply negative terminal 2, a power supply positive terminal 3, a power supply negative terminal 4, a power supply positive locking mechanism 5, a power supply negative locking mechanism 6, a power supply positive locking mechanism 7, a power supply negative locking mechanism 8, a first on-off mechanism 9 and a second on-off mechanism 10 which are all arranged on the surface of a shell 11, wherein the power supply positive terminal 1 is connected with the power supply positive locking mechanism 5, the power supply positive terminal 3 is connected with the power supply positive locking mechanism 7, the power supply negative terminal 4 is connected with the power supply negative locking mechanism 8, the first on-off mechanism 9 is connected with the power supply negative locking mechanism 6, the power supply negative terminal 2 and the power supply positive terminal 3, and the second on-off mechanism 10 is connected with the power supply negative terminal 2 and the power supply negative terminal 4.
Further, the on-off mechanism I9 is a self-locking button switch and comprises two normally open contacts and two normally closed contacts.
Further, the second on-off mechanism 10 is a self-locking button switch and comprises a normally open contact.
Further, the power supply positive locking mechanism 5 and the power supply negative locking mechanism 6 are connected with a power supply end of an external sensor, and the electric signal positive locking mechanism 7 and the electric signal negative locking mechanism 8 are connected with a signal output end of the external sensor.
Further, the power supply positive terminal 1 and the power supply negative terminal 2 are connected with a direct current stabilized power supply.
Further, the electric signal positive terminal 3 and the electric signal negative terminal 4 are connected with an external digital multimeter. Furthermore, the power supply anode locking mechanism 5, the power supply cathode locking mechanism 6, the electrical signal anode locking mechanism 7 and the electrical signal cathode locking mechanism 8 have the same structure and comprise a metal pipe body 13, a spring and a cover cap 12, the cap 12 is slidably mounted on the metal tube 13, the spring is located in the metal tube 13, one end of the spring is abutted against the bottom of the metal tube 13, the other end of the spring is abutted against the inner top wall of the cap 12, the outer wall surface of the pipe body 13 is provided with a stop pin, the side wall of the cap 12 is provided with a sliding groove, the stop pin is arranged in the sliding groove, the cap 12 is limited, a first through hole is arranged on the side wall of the cap 12, a second through hole corresponding to the first through hole is arranged on the metal pipe body 13, when the cap 12 is pressed, the first through hole coincides with the second through hole, and a lead of the sensor penetrates through the first through hole and is locked with the second through hole.
Method of portable multipurpose wiring device:
when two normally open contacts of the first on-off mechanism 9 become a normally closed state, two normally closed contacts become a normally open state, and one normally open contact of the second on-off mechanism 10 becomes a normally closed state, at the moment, the power supply positive electrode locking mechanism 5 supplies power to the sensor, the electric signal positive electrode locking mechanism 7 is connected with the positive electrode of the signal output end of the external sensor, and the output signal of the sensor is acquired; the power supply negative terminal 2 and the on-off mechanism I9 are disconnected, the power supply negative terminal 2, the electric signal negative terminal 4 and the electric signal negative locking mechanism 8 are communicated by the on-off mechanism II 10, and the electric signal positive terminal 3, the power supply negative locking mechanism 6 and the electric signal positive locking mechanism 7 are communicated by the on-off mechanism I9 to participate in signal acquisition of the sensor, so that a two-wire system signal acquisition mode is formed;
when two normally open contacts of the first on-off mechanism 9 are kept in a normally open state, two normally closed contacts are kept in a normally closed state, and one normally open contact of the second on-off mechanism 10 is changed into a normally closed state, at the moment, the power supply anode locking mechanism 5 serves as a power supply anode to supply power to the sensor, the electric signal anode locking mechanism 7 is connected with the anode of a signal output end of an external sensor, and an output signal of the sensor is collected; the power supply negative terminal 2, the electric signal negative terminal 4, the power supply negative locking mechanism 6 and the electric signal negative locking mechanism 8 are communicated with the second on-off mechanism 10, and at the moment, the power supply negative locking mechanism 6 and the electric signal negative locking mechanism 8 are jointly used as a power supply negative electrode to supply power to the sensor, so that a three-wire system signal acquisition mode is formed;
when two normally open contacts of the first on-off mechanism 9 are kept in a normally open state, two normally closed contacts are kept in a normally closed state, and one normally open contact of the second on-off mechanism 10 is kept in a normally open state, the power supply anode locking mechanism 5 and the power supply cathode locking mechanism 6 respectively supply power to an external sensor, and the electric signal anode locking mechanism 7 and the electric signal cathode locking mechanism 8 are connected with the external sensor to acquire an output signal of the sensor; and forming a four-wire system signal acquisition mode.
Advantageous effects
The device has the advantages of simple structure, convenient carrying, convenient operation, time and labor saving, higher reliability and lower cost, ensures good contact of the wiring, achieves a stable communication effect, and avoids the condition that the wiring is mistakenly touched with a short circuit. The protection performance of the invention is good, and the method of the invention can rapidly switch the sensors with various models by the first on-off mechanism and the second on-off mechanism, thereby greatly improving the wiring efficiency, ensuring the stability of the electrical connection and simultaneously improving the working efficiency, being easy to popularize and apply and having greater practical value.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a cap structure of the locking mechanism;
FIG. 3 is a schematic view of a metal tube of the locking mechanism;
FIG. 4 is a schematic view of a structure of the on-off mechanism;
FIG. 5 is a schematic structural view of the second on-off mechanism;
the power supply comprises a power supply positive terminal, a power supply negative terminal, a power signal positive terminal, a power signal negative terminal, a power supply positive locking mechanism, a power supply negative locking mechanism, a power supply positive locking mechanism, a power supply negative terminal, a power supply, wherein 1, a power supply, wherein 1, and a power supply, wherein 1, and a power supply, wherein 1.
Detailed Description
As shown in figure 1, a portable multipurpose wiring device comprises a shell 11, a power supply positive terminal 1, a power supply negative terminal 2, a power supply positive terminal 3, a power supply negative terminal 4, a power supply positive locking mechanism 5, a power supply negative locking mechanism 6, a power supply positive locking mechanism 7, a power supply negative locking mechanism 8, a first on-off mechanism 9 and a second on-off mechanism 10, wherein the power supply positive terminal 1, the power supply negative terminal 2, the power supply positive terminal 3, the power supply negative terminal 4, the power supply positive locking mechanism 5, the power supply negative locking mechanism 6, the power supply positive locking mechanism 7, the power supply negative locking mechanism 8, the first on-off mechanism 9 and the second on-off mechanism 10 are all arranged on the surface of the shell 11, the power supply positive terminal 1 and the power supply negative terminal 2 are connected with a direct current stabilized power supply through an external lead on a top panel of the shell 11, the terminal of the power positive terminal 1 in the shell 11 is connected with the terminal of the power positive locking mechanism 5 through a lead, the terminal of the power negative terminal 2 in the shell 11 is connected with the terminals of the first on-off mechanism 9 and the second on-off mechanism 10 through leads, the terminal of the power positive terminal 3 and the terminal of the power negative terminal 4 in the top panel of the shell 11 are connected with the digital multimeter through a direct plug-in external lead, the terminal of the power positive terminal 3 in the shell 11 is connected with the positive locking mechanism 7 and the terminal of the first on-off mechanism 9 through leads, the terminal of the power negative terminal 4 in the shell 11 is connected with the terminals of the positive locking mechanism 8 and the first on-off mechanism 9 through leads, the locking mechanisms 5, 6, 7 and 8 fixed on the top panel of the shell 11 are connected with a sensor, and the locking mechanisms 5, 6, 7 and 8 are pressed, 6. 7, 8 can test the sensor of four-wire system signal output by penetrating the electric wire into the terminal, can test the sensor of two-wire system signal output by the on-off mechanism 9, can test the output sensor of three-wire system signal by the on-off mechanism 10.
As shown in fig. 4, the first on-off mechanism 9 is a self-locking button switch, and includes two normally open contacts and two normally closed contacts. As shown in fig. 5, the second on-off mechanism 10 is a self-locking button switch, and includes a normally open contact.
Furthermore, the power supply positive locking mechanism 5 and the power supply negative locking mechanism (6) are connected with a power supply end of an external sensor, and the electric signal positive locking mechanism 7 and the electric signal negative locking mechanism (8) are connected with a signal output end of the external sensor.
Further, the power supply positive terminal 1 and the power supply negative terminal 2 are connected with a direct current stabilized power supply.
Further, the electric signal positive terminal 3 and the electric signal negative terminal 4 are connected with an external digital multimeter.
Furthermore, the power supply anode locking mechanism 5, the power supply cathode locking mechanism 6, the electrical signal anode locking mechanism 7 and the electrical signal cathode locking mechanism 8 have the same structure and comprise a metal pipe body 13, a spring and a cover cap 12, the cap 12 is slidably mounted on the metal tube 13, the spring is located in the metal tube 13, one end of the spring is abutted against the bottom of the metal tube 13, the other end of the spring is abutted against the inner top wall of the cap 12, the outer wall surface of the pipe body 13 is provided with a stop pin, the side wall of the cap 12 is provided with a sliding groove, the stop pin is arranged in the sliding groove, the cap 12 is limited, a first through hole is arranged on the side wall of the cap 12, a second through hole corresponding to the first through hole is arranged on the metal pipe body 13, when the cap 12 is pressed, the first through hole coincides with the second through hole, and a lead of the sensor penetrates through the first through hole and is locked with the second through hole.
Method of portable multipurpose wiring device:
when two normally open contacts of the first on-off mechanism 9 become a normally closed state, two normally closed contacts become a normally open state, and one normally open contact of the second on-off mechanism 10 becomes a normally closed state, at the moment, the power supply positive electrode locking mechanism 5 supplies power to the sensor, the electric signal positive electrode locking mechanism 7 is connected with the positive electrode of the signal output end of the external sensor, and the output signal of the sensor is acquired; the power supply negative terminal 2 and the on-off mechanism I9 are disconnected, the power supply negative terminal 2, the electric signal negative terminal 4 and the electric signal negative locking mechanism 8 are communicated by the on-off mechanism II 10, and the electric signal positive terminal 3, the power supply negative locking mechanism 6 and the electric signal positive locking mechanism 7 are communicated by the on-off mechanism I9 to participate in signal acquisition of the sensor, so that a two-wire system signal acquisition mode is formed;
when two normally open contacts of the first on-off mechanism 9 are kept in a normally open state, two normally closed contacts are kept in a normally closed state, and one normally open contact of the second on-off mechanism 10 is changed into a normally closed state, at the moment, the power supply anode locking mechanism 5 serves as a power supply anode to supply power to the sensor, the electric signal anode locking mechanism 7 is connected with the anode of a signal output end of an external sensor, and an output signal of the sensor is collected; the power supply negative terminal 2, the electric signal negative terminal 4, the power supply negative locking mechanism 6 and the electric signal negative locking mechanism 8 are communicated with the second on-off mechanism 10, and at the moment, the power supply negative locking mechanism 6 and the electric signal negative locking mechanism 8 are jointly used as a power supply negative electrode to supply power to the sensor, so that a three-wire system signal acquisition mode is formed;
when two normally open contacts of the first on-off mechanism 9 are kept in a normally open state, two normally closed contacts are kept in a normally closed state, and one normally open contact of the second on-off mechanism 10 is kept in a normally open state, the power supply anode locking mechanism 5 and the power supply cathode locking mechanism 6 respectively supply power to an external sensor, and the electric signal anode locking mechanism 7 and the electric signal cathode locking mechanism 8 are connected with the external sensor to acquire an output signal of the sensor; and forming a four-wire system signal acquisition mode.
The device has the advantages of simple structure, convenient carrying, convenient operation, time and labor saving, higher reliability and lower cost, ensures good contact of the wiring, achieves a stable communication effect, and avoids the condition that the wiring is mistakenly touched with a short circuit. The protection performance of the invention is good, and the method of the invention can rapidly switch the sensors with various models by the first on-off mechanism and the second on-off mechanism, thereby greatly improving the wiring efficiency, ensuring the stability of the electrical connection and simultaneously improving the working efficiency, being easy to popularize and apply and having greater practical value.

Claims (8)

1. A portable multipurpose wiring device is characterized by comprising a shell, a power supply positive terminal, a power supply negative terminal, an electric signal positive terminal, an electric signal negative terminal, a power supply positive locking mechanism, a power supply negative locking mechanism, an electric signal positive locking mechanism, an electric signal negative locking mechanism, an on-off mechanism I and an on-off mechanism II; the power supply positive terminal, the power supply negative terminal, the electric signal positive terminal, the electric signal negative terminal, the power supply positive locking mechanism, the power supply negative locking mechanism, the electric signal positive locking mechanism, the electric signal negative locking mechanism, the on-off mechanism I and the on-off mechanism II are all arranged on the surface of the shell, the power supply positive terminal is connected with the power supply positive locking mechanism, the power supply negative terminal is connected with the power supply negative locking mechanism, the electric signal positive terminal is connected with the electric signal positive locking mechanism, the electric signal negative terminal is connected with the electric signal negative locking mechanism, the on-off mechanism I is connected with the electric signal positive locking mechanism and the power supply negative terminal, the other end of the on-off mechanism I is connected with one end of the on-off mechanism II, and the other end of the on-off mechanism II is connected with the electric signal negative terminal.
2. A portable multi-purpose wiring device according to claim 1, wherein said first on/off mechanism is a latching push button switch including two normally open contacts and two normally closed contacts.
3. The portable multipurpose wiring device according to claim 1, wherein the second on-off mechanism is a self-locking push button switch including two normally open contacts.
4. The portable multipurpose wiring device as claimed in claim 1, wherein the positive power locking mechanism and the negative power locking mechanism are connected to a power end of an external sensor, and the positive electrical signal locking mechanism and the negative electrical signal locking mechanism are connected to a signal output end of the external sensor.
5. The portable multipurpose wiring device according to claim 1, wherein the positive power terminal and the negative power terminal are connected to a regulated dc power supply.
6. The portable utility connection assembly of claim 1, wherein the positive electrical signal terminal and the negative electrical signal terminal are connected to an external digital utility meter.
7. A portable multi-purpose wiring device according to claim 4, the power supply positive pole locking mechanism, the power supply negative pole locking mechanism, the electric signal positive pole locking mechanism and the electric signal negative pole locking mechanism have the same structure and comprise a metal pipe body, a spring and a cover cap, the cap is arranged on the metal tube body in a sliding way, the spring is positioned in the metal tube body, one end of the spring is abutted against the bottom of the metal tube body, the other end of the spring is abutted against the inner top wall of the cap, the outer wall surface of the pipe body is provided with a stop pin, the side wall of the cover cap is provided with a sliding groove, the stop pin is arranged in the sliding groove, the cap is limited, a first through hole is arranged on the side wall of the cap, a second through hole corresponding to the first through hole is arranged on the metal pipe body, when the cap is pressed, the first through hole coincides with the second through hole, and a lead of the sensor penetrates through the first through hole and is locked with the second through hole.
8. A method of portable multi-purpose wiring device according to any of claims 1-7, wherein:
when two normally open contacts of the first on-off mechanism become a normally closed state, two normally closed contacts become a normally open state, and one normally open contact of the second on-off mechanism becomes a normally closed state, at the moment, the power supply anode locking mechanism supplies power to the sensor, the electric signal anode locking mechanism is connected with the anode of the signal output end of the external sensor, and the output signal of the sensor is collected; the power supply negative terminal and the on-off mechanism I are disconnected, the power supply negative terminal, the electric signal negative terminal and the electric signal negative locking mechanism are communicated by the on-off mechanism II, and the electric signal positive terminal, the power supply negative locking mechanism and the electric signal positive locking mechanism are communicated by the on-off mechanism I to participate in signal acquisition of the sensor, so that a two-wire system signal acquisition mode is formed;
when two normally open contacts of the first on-off mechanism are kept in a normally open state, two normally closed contacts are kept in a normally closed state, and one normally open contact of the second on-off mechanism is changed into a normally closed state, at the moment, the power supply anode locking mechanism serves as a power supply anode to supply power to the sensor, the electric signal anode locking mechanism is connected with the anode of the signal output end of the external sensor, and the output signal of the sensor is collected; the power supply negative terminal, the electric signal negative terminal, the power supply negative locking mechanism and the electric signal negative locking mechanism are communicated with the on-off mechanism II, and at the moment, the power supply negative locking mechanism and the electric signal negative locking mechanism are jointly used as a power supply negative electrode to supply power to the sensor, so that a three-wire system signal acquisition mode is formed;
when two normally open contacts of the first on-off mechanism are kept in a normally open state, two normally closed contacts are kept in a normally closed state, and one normally open contact of the second on-off mechanism is kept in a normally open state, the power supply anode locking mechanism and the power supply cathode locking mechanism respectively supply power to the external sensor, and the electric signal anode locking mechanism and the electric signal cathode locking mechanism are connected with the external sensor to acquire an output signal of the sensor; and forming a four-wire system signal acquisition mode.
CN202111681429.8A 2021-12-30 2021-12-30 Portable multipurpose wiring device and method Pending CN114325538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111681429.8A CN114325538A (en) 2021-12-30 2021-12-30 Portable multipurpose wiring device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111681429.8A CN114325538A (en) 2021-12-30 2021-12-30 Portable multipurpose wiring device and method

Publications (1)

Publication Number Publication Date
CN114325538A true CN114325538A (en) 2022-04-12

Family

ID=81023490

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111681429.8A Pending CN114325538A (en) 2021-12-30 2021-12-30 Portable multipurpose wiring device and method

Country Status (1)

Country Link
CN (1) CN114325538A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007333544A (en) * 2006-06-14 2007-12-27 Kyowa Electron Instr Co Ltd Strain measuring circuit using monogauge method
CN203573119U (en) * 2013-11-29 2014-04-30 航宇救生装备有限公司 Redundant circuit of drogue parachute lock
CN103954315A (en) * 2014-04-25 2014-07-30 西安航空动力股份有限公司 Online detecting method of data collecting system
CN203798872U (en) * 2014-04-04 2014-08-27 浙江浦成电气有限公司 Electric meter box with firm incoming line
CN206583552U (en) * 2016-10-27 2017-10-24 辽宁省计量科学研究院 A kind of scanning switch detected applied to thermocouple, thermal resistance
CN112964913A (en) * 2021-03-02 2021-06-15 三一重能股份有限公司 Analog quantity signal acquisition device and control cabinet
CN214850273U (en) * 2021-02-22 2021-11-23 国网能源伊犁煤电有限公司 Wiring box convenient for wiring for electrical engineering

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007333544A (en) * 2006-06-14 2007-12-27 Kyowa Electron Instr Co Ltd Strain measuring circuit using monogauge method
CN203573119U (en) * 2013-11-29 2014-04-30 航宇救生装备有限公司 Redundant circuit of drogue parachute lock
CN203798872U (en) * 2014-04-04 2014-08-27 浙江浦成电气有限公司 Electric meter box with firm incoming line
CN103954315A (en) * 2014-04-25 2014-07-30 西安航空动力股份有限公司 Online detecting method of data collecting system
CN206583552U (en) * 2016-10-27 2017-10-24 辽宁省计量科学研究院 A kind of scanning switch detected applied to thermocouple, thermal resistance
CN214850273U (en) * 2021-02-22 2021-11-23 国网能源伊犁煤电有限公司 Wiring box convenient for wiring for electrical engineering
CN112964913A (en) * 2021-03-02 2021-06-15 三一重能股份有限公司 Analog quantity signal acquisition device and control cabinet

Similar Documents

Publication Publication Date Title
CN204465147U (en) A kind of power control circuit of motor-operating mechanism of circuit breaker
CN103441231A (en) Battery pack connecting and data sampling method
CN114325538A (en) Portable multipurpose wiring device and method
CN201689162U (en) Voltage and electricity measuring instrument
CN210090544U (en) Isolated direct current voltage sampling circuit
CN208443870U (en) A kind of electric energy meter testing jig
CN210181131U (en) Multifunctional electric power measurement and control instrument
CN203337767U (en) CT polarity detector
CN202794230U (en) Converter for detecting serial data plugs
CN218298398U (en) Lithium battery protection board detection tool adaptive to different string numbers
CN204044333U (en) A kind of portable type measuring battery capacity equipment
CN209822767U (en) Power supply of micro-station
CN214845495U (en) Grounding resistance on-line detector
CN220855086U (en) Test adapter suitable for 555 time base circuit
CN216052740U (en) Control console detection device
CN219641754U (en) Concentrator auxiliary terminal expander
CN109521278A (en) A kind of test fixture and method of coaxial cable internal and external conductor resistance
CN217769462U (en) Electric buffering protection circuit on equipment
CN219978498U (en) Electric leakage detection system applied to fire rescue
CN213398713U (en) Guide rail type prepayment electric energy meter
CN209417195U (en) A kind of Combined type cable line connector
CN201007716Y (en) Pure water tester
CN203084062U (en) Current tester specially used in photovoltaic junction box
CN210167615U (en) Line concentration circuit board of medium-large scale line communication module
CN213398856U (en) Storage battery sensor based on Lora wireless transmission function

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination