CN113884836B - Cable secondary line calibrator - Google Patents
Cable secondary line calibrator Download PDFInfo
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- CN113884836B CN113884836B CN202111273958.4A CN202111273958A CN113884836B CN 113884836 B CN113884836 B CN 113884836B CN 202111273958 A CN202111273958 A CN 202111273958A CN 113884836 B CN113884836 B CN 113884836B
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 24
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- General Physics & Mathematics (AREA)
- Electric Cable Installation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a cable secondary line calibrator, which belongs to the technical field of power cable calibration, and comprises a host computer and a slave computer, wherein the host computer and the slave computer are respectively connected with two ends of a cable to be calibrated; the master machine and the slave machine comprise a machine body, a wire core wiring module and a wire core display module; the wire core display module comprises a liquid crystal screen arranged on the machine body; the machine body comprises a first machine body on the master machine and a second machine body on the slave machine; the wire core wiring module comprises a first wiring port arranged on the first machine body and a second wiring port arranged on the second machine body; one end of the cable to be checked is connected to the first wiring port, the other end of the cable to be checked is connected to the second wiring port, information of the cable to be checked is edited through the host computer and is sent to the slave computer, and the slave computer receives the information of the cable to be checked and checks the cable to be checked. The invention can intuitively determine whether the cable to be tested is electrified or not, and whether the secondary line of the cable can be calibrated or not, and can quickly and automatically determine the wire cores of the secondary line of the cable in a large scale.
Description
Technical Field
The invention relates to the technical field of power cable verification, in particular to a cable secondary line calibrator.
Background
In the field of an electric power system, the current common method for calibrating the line is to utilize the on-off of the universal meter (or on-lamp) and the auxiliary of an interphone to calibrate. The like products in the current market adopt a mode of measuring high and low levels to distinguish different circuits, and only whether the circuits are unobstructed or not can be detected, but the names of the circuits cannot be known, and the live cables cannot be effectively identified, so that certain fault hidden danger can be brought. By consulting and investigating domestic same industry units, most units are found to determine the correctness of the wire core by using a universal meter to switch on and off a gear to ground or to switch on and off a standby core amount. There is no effective means for simply, quickly and accurately determining the correctness of a large number of pairs of cable cores. The methods are time-consuming, labor-consuming, error-prone, troublesome in engineering construction and more importantly limited by the fact that wireless communication is forbidden in many high-frequency equipment application occasions.
The patent document with the publication number of CN105606947A discloses a quick secondary cable loop calibration instrument, which belongs to the field of calibration equipment, and comprises an A terminal and a B terminal, wherein the A terminal and the B terminal are respectively connected at two ends of a secondary loop cable to be tested; the terminal A comprises a pressurized power supply DC1 and n control branches connected in parallel, wherein the n control branches are connected in parallel and then connected with the positive electrode of the pressurized power supply DC1, and the negative electrode of the control branches is grounded; one end of each control branch is connected with the positive electrode of the pressurized power supply DC1, and the other end of each control branch is provided with a jointing clamp Ja for connecting any core in the tested secondary loop cable; the terminal B comprises n parallel indication branches, the structures of the n parallel indication branches are the same, and each indication branch comprises a terminal B indicator lamp Lb and a terminal B forward diode Db connected in series with the terminal B indicator lamp Lb; one end of each indicating branch is grounded, and the other end of each indicating branch is provided with a jointing clamp Jb for connecting any core of the tested secondary loop cable. The line calibrating instrument can simplify the line calibrating work, namely, the line calibrating work is finished by adopting a mode of a transmitter-receiver, but the receiver only can know whether a certain line is unobstructed or not, and the specific name of the line cannot be known.
The patent with the publication number of CN208443947U discloses a novel intelligent multifunctional wire calibrating instrument based on coded communication, which comprises a host machine and a slave machine, wherein the host machine and the slave machine are respectively connected to two ends of a multi-core control cable to be tested, a user edits the name of the wire core to be tested on the host machine side and carries out coding processing, then the wire core of the multi-core control cable to be tested is sent to the slave machine side, the slave machine can receive the name information of the wire core to be tested, then the wire core name is decoded and displayed on a slave machine screen, and a wire calibrating worker can finish wire calibrating work by displaying the received wire core name on a slave machine liquid crystal, and the host machine and the slave machine can finish a voice call function through one wire. The line corrector can finish information editing and decoding, but cannot recognize high-voltage signals, and has safety risks.
Disclosure of Invention
In view of the above, the present invention provides a secondary cable calibration device.
In order to solve the technical problems, the invention adopts the following technical scheme:
The secondary cable calibration instrument comprises a host computer and a slave computer, wherein the host computer and the slave computer are respectively connected with two ends of a cable to be calibrated; the master machine and the slave machine comprise a machine body, a wire core wiring module and a wire core display module;
the wire core display module comprises a liquid crystal screen arranged on the machine body;
the machine body comprises a first machine body on the master machine and a second machine body on the slave machine;
the wire core wiring module comprises a first wiring port arranged on the first machine body and a second wiring port arranged on the second machine body;
one end of the cable to be checked is connected to the first wiring port, the other end of the cable to be checked is connected to the second wiring port, the information of the cable to be checked is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be checked and checks the cable to be checked;
Further, the first body comprises a first shell and a first control system arranged inside the first shell;
the first shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a pickup hole arranged at the lower end of the first shell, a power switch arranged on the side surface of the first shell, a charging interface and a voice button.
Further, the second body comprises a second shell and a second control system arranged inside the second shell;
the structure of the second shell is the same as that of the first shell, and the second shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a pickup hole arranged at the lower end of the second shell, a power switch arranged on the side face of the second shell, a charging interface and a voice button.
Further, the first connection port comprises a multiplex transmission port, a voice connection port and a ground port.
Further, the second connection port comprises a multipath receiving port, a voice connection port and a grounding port.
Further, the host computer edits characters through the operation keyboard, displays the information of the cable to be checked on a liquid crystal screen, and sends the information to the slave computer;
And the slave receives the information of the cable to be checked, checks the information, and displays a check result on the liquid crystal screen.
In the installation construction of electrical equipment, the multicore cable checks the core wires according to the design drawing and confirms registration, which is an indispensable construction procedure before the cable is connected and wired. The similar products can be mostly finished by simplifying the wire calibration work, namely adopting a mode of a transmitter-receiver. One end of the cable to be tested is connected to the transmitter by a numbered wire clip, and then the other end of the cable is identified one by a receiver. Although the work is simplified, the receiver can only know whether a certain line is unobstructed or not, and cannot know the specific name of the line. For example, the receiving end can only display "1" or "2" or "3", and the like, and the check of the line name needs to be performed manually. For example, patent publication No. CN201589833U discloses a microcomputer line calibrator device, which comprises a host and a slave, the host comprises a first control module, a first man-machine interface module and a transmitting module, the slave comprises a second control module, a second man-machine interface module and a receiving module, the first man-machine interface module and the transmitting module are connected with the first control module through an input/output port bus, the second man-machine interface module and the receiving module are connected with the second control module through an input/output bus, and the transmitting module is connected with the receiving module. The patent with publication number CN201819962U discloses a power system wire calibrating device, in particular an intelligent cable wire calibrating instrument. The intelligent cable calibration instrument comprises a host computer and a slave computer, and is characterized in that: the host is internally provided with a host processor, the surface of the host is provided with a host display screen, an input keyboard and a plurality of test ports A which are connected with the host processor, each test port A is correspondingly provided with a signal indicator lamp A, the host is provided with a grounding wire and a power adapter socket, and one side of the host is provided with a battery cabin A; the slave processor is arranged in the slave machine, a slave machine display screen, a signal indicator lamp B and a test port B which are connected with the slave machine processor are arranged on the surface of the slave machine, and a battery compartment B is arranged on one side of the slave machine.
The same type of product cannot know the names of the lines because of the problem of the communication mode. In the field of the power system, the RS232 communication mode is not suitable for cables with large long-distance interference, and 485 communication needs two wires, so that the operation of simplifying the wire correction is not met. Therefore, the similar products can only judge the line by adopting a high-low level pulse mode, but the transmitted information quantity is very small. The invention also adopts a high-low level pulse mode to judge, but increases the transmitted information quantity, and the codes are customized internally, so that characters can be transmitted, and the work of calibrating lines is simplified to the bottom. Meanwhile, the line correcting instrument can identify high-voltage signals, if a line correcting person carelessly and mistakenly connects the line correcting instrument to the electrified cable, the line correcting instrument can sound a buzzer to prompt that a line is high-voltage, personnel safety accidents are prevented, and system risks are reduced. The invention can further simplify the work, and not only can know whether the circuit is unobstructed or not, but also can know the specific name of the circuit. The receiving end can know the names of the lines, such as 'XTK 01-023', by inputting the coded line names to the transmitter end.
Compared with the prior art, the invention has the following beneficial effects:
the development of the cable secondary line calibration instrument utilizes the wire core wiring module and the wire core display module which are highly intelligent and automatic, and the wire core wiring module and the wire core display module have a communication function, so that whether a cable to be tested is electrified or not can be intuitively determined, whether the cable secondary line calibration instrument can be used for cable secondary line calibration or not can be rapidly and automatically determined in batches.
(1) The secondary cable calibration instrument can be used for rapidly and accurately detecting whether the fiber core of the cable to be tested is electrified or not and whether the secondary cable calibration can be performed or not;
(2) The wire corrector can be used for rapidly detecting short-circuit faults among all wires and cables, and the short-circuit between any two wires can be rapidly detected and the labels of all the short-circuit wires are displayed;
(3) The wiring is simple, the equipment is reliable, the efficiency is high, the carrying is convenient, the intelligent communication is high, the accuracy is high, the workload is small, the simultaneous coordination of a plurality of people is not needed, and the safety is high;
(4) The correct use of the secondary cable cores of the cable can be intuitively and clearly displayed in a large batch to make a judgment.
(5) Can discern high voltage signal, if school line personnel carelessly mistake when arriving electrified cable with school line appearance, school line appearance can beep by the buzzer, and the suggestion has the circuit high pressure, prevents that personnel incident from appearing, reduces the system risk.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a cable secondary line calibrator.
Fig. 2 is a schematic structural diagram of a host according to the present invention.
Fig. 3 is a schematic structural view of a first connection port of the present invention.
FIG. 4 is a schematic diagram of an editable character of a host liquid crystal display of the invention.
Fig. 5 is a schematic diagram of a slave lcd screen of the present invention capable of receiving characters.
Fig. 6 is a schematic block diagram of a cable secondary line calibrator of the present invention.
Fig. 7 is a schematic block diagram of the high voltage identification of the host of the present invention.
Fig. 8 is a schematic block diagram of the slave serial data reception of the present invention.
The meaning of each reference numeral is as follows:
1: first organism, 2: first wiring port, 3: second wiring port, 4: second organism, 5: first housing, 6: liquid crystal screen, 7: voice button, 8: operating keyboard, 9: pick-up hole, 10: power switch, 11: charging interface, 12: voice connection port, 13: a ground port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 8 of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Examples
Referring to fig. 1-3 of the specification, the embodiment provides a secondary cable calibration instrument,
The secondary cable calibration instrument comprises a host computer and a slave computer, wherein the host computer and the slave computer are respectively connected with two ends of a cable to be calibrated; the master machine and the slave machine comprise a machine body, a wire core wiring module and a wire core display module;
The wire core display module comprises a liquid crystal screen 6 arranged on the machine body;
the machine body comprises a first machine body 1 on the master machine and a second machine body 4 on the slave machine;
The wire core wiring module comprises a first wiring port 2 arranged on the first machine body 1 and a second wiring port 3 arranged on the second machine body 4;
One end of the cable to be checked is connected to the first wiring port 2, the other end of the cable to be checked is connected to the second wiring port 3, information of the cable to be checked is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be checked and checks the cable to be checked.
The first body 1 includes a first housing 5 and a first control system provided inside the first housing 5;
The first housing 5 includes an operation keyboard 8 disposed at the lower portion of the liquid crystal screen 6, a sound pick-up hole 9 disposed at the lower end of the first housing, a power switch 10 disposed at the side of the first housing, a charging interface 11, and a voice button 7. The first connection port 2 is provided at an upper end portion of the first housing 5.
The second machine body comprises a second shell and a second control system arranged inside the second shell;
the structure of the second shell is the same as that of the first shell, and the second shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a pickup hole arranged at the lower end of the second shell, a power switch arranged on the side face of the second shell, a charging interface and a voice button.
The first connection ports include a multiplex transmission port, a voice connection port 12 and a ground port 13.
The second wiring port comprises a multipath receiving port, a voice wiring port and a grounding port.
Referring to fig. 4-5 of the specification, the host computer edits characters through the operation keyboard, displays information of the cable to be checked on a liquid crystal screen, and sends the information to the slave computer;
And the slave receives the information of the cable to be checked, checks the information, and displays a check result on the liquid crystal screen.
As an optimization manner of this embodiment, the first connection port includes 8 paths of transmission ports, and the second connection port includes 8 paths of receiving ports, where the 8 th path is a receiving port.
Referring to fig. 6 of the specification, the first control system and the second control system each include a CPU, a signal transmitting circuit and a signal receiving circuit connected with the CPU. The CPU uses STM32F407VGT6 chip, which has a main frequency of 168MHz,1MBflash space, and has 192KB on-chip RAM.
The first control system and the second control system are powered by 4000mAH of an 8.4V lithium battery, the endurance time is longer than 24 hours, and the battery management unit is used for realizing management functions such as battery charging and discharging and the like and also used for voltage conversion and providing power supply for a digital circuit, an analog circuit and a liquid crystal part.
After the user edits the names of the circuits, pressing an operation key, the CPU sends ASCII codes of the circuits to the FPGA through the bus at one time, the FPGA performs parallel-serial conversion on the data, and the data is added with check bytes and sent to 1-8 paths of output ports.
The slave receives serial data sent by the host through the 8 th port, and the CPU analyzes and checks the serial data.
As an optimization manner of this embodiment, the first control system further includes a high voltage identification module. Referring to fig. 7 of the specification, a high-voltage identification schematic block diagram of one path is shown, other seven paths of schematic diagrams are the same, the high-voltage identification module comprises a bidirectional optocoupler, resistors RS and Ru, and the RS is connected with an output terminal; the 3-pin and the 4-pin of the bidirectional optocoupler are grounded, the 2-pin is connected with the resistor RS, the 6-pin is connected with the resistor Ru and the CPU, and the CPU is connected with the buzzer. Before the cable is wired, J1 is not closed, serial data and the port are disconnected, if the port has a high-voltage alternating current or direct current signal larger than 50V, the TLP184 optocoupler is conducted, VSpy1 becomes low level, after the CPU detects the low level, the port is judged to have high voltage, a port serial number with high voltage is displayed on the liquid crystal screen, and a buzzer prompts an maintainer to conduct wiring inspection. Because the input end of the port is provided with a series resistor RS, the resistance is 20K/2W, and the live cable is connected to the port without influencing a live circuit. The line calibrating instrument can detect whether each output port has high voltage before starting the test, if a certain port has high voltage, the J1 relay is not closed, and high-voltage alarm is carried out.
Referring to fig. 8 of the specification, the second control system further includes a live detection module, where the secondary live detection schematic block diagram is the same as the live detection part of the high-voltage identification module of the host. The live detection module comprises a bidirectional optocoupler, resistors RS1 and RS2, two resistors Ru, a MOS tube and a bidirectional stabilizing tube; the 3 pins of the bidirectional optocoupler are grounded, the 1 pin is connected with the resistor RS2, the 6 pin is connected with the resistor Ru, the D end of the MOS tube is connected with the other resistor Ru, the G end is connected with the resistor RS1, and the S end is grounded; the bidirectional stabilizer tube is respectively connected with the D end and the G end of the MOS tube.
The serial data analysis receiving part of the slave adopts an MOS tube scheme, if the input terminal of the slave is connected with a cable and has a high-voltage signal, then the slave detects VSpy to be in a low level, the slave buzzer can be started, and the liquid crystal can provide a high-voltage dangerous mark. The slave receives a normal high-level signal, the MOS is conducted, the S1 outputs a low-level signal, the slave receives a low-level signal, the MOS tube is cut off, the S1 outputs a high-level signal, the slave analyzes and checks data through the monitored high-low-level signal, and line name information is displayed on the liquid crystal.
As an optimization manner of this embodiment, the first control system and the second control system further include a voice module, an LED lighting module, and the like.
The invention has the following advantages:
(1) The instrument is small and light in weight. Can be "held" on the hand.
(2) The liquid crystal screen may display the line name.
(3) And (5) voice communication.
(4) And (5) short circuit detection.
(5) And (5) LED illumination.
(6) The master and the slave can be switched to each other.
(7) The connection is simple and the operation is simple.
(8) The cable is provided with a power prompt.
(9) The lithium battery is used for supplying power, an external power supply is not needed, the power consumption is low, and the lithium battery can be charged.
The invention can be used in the field with bad environment, which means that the field may have noisy, high-frequency interference and wireless communication is not allowed, the traditional wire calibrating method and other similar products need two persons to carry out voice communication, and the working efficiency is greatly reduced under the condition. The invention has the function of editing the line names, so that even if voice communication is not used, the unobstructed line can be detected and the line names can be known.
The invention can be used by a single person, and the single person use state refers to that only one person is required for calibrating the cable on the electric power site, one end of the cable can be connected by a host computer, characters can be edited for transmission, then the other end of the cable is walked, the cables are detected one by a slave computer, whether the cable is unobstructed or not and the names of the lines are known from a screen, and the cable calibration is completed.
In the description of the present invention, it should be understood that relational terms such as "a" and "an" and "the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (3)
1. The cable secondary line school line appearance, including host computer and slave machine, its characterized in that: the host computer and the slave computer are respectively connected with two ends of the cable to be checked; the master machine and the slave machine comprise a machine body, a wire core wiring module and a wire core display module;
the wire core display module comprises a liquid crystal screen arranged on the machine body;
the machine body comprises a first machine body on the master machine and a second machine body on the slave machine;
the wire core wiring module comprises a first wiring port arranged on the first machine body and a second wiring port arranged on the second machine body;
one end of the cable to be checked is connected to the first wiring port, the other end of the cable to be checked is connected to the second wiring port, the information of the cable to be checked is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be checked and checks the cable to be checked;
the first machine body comprises a first shell, a first wire core display module arranged on the first shell and a first control system arranged inside the first shell;
The first shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a pickup hole arranged at the lower end of the first shell, a power switch arranged on the side surface of the first shell, a charging interface and a voice button;
The second machine body comprises a second shell and a second control system arranged inside the second shell;
the structure of the second shell is the same as that of the first shell, and the second shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a pickup hole arranged at the lower end of the second shell, a power switch arranged on the side surface of the second shell, a charging interface and a voice button;
The first control system further comprises a high-voltage identification module, wherein the high-voltage identification module comprises a bidirectional optocoupler I, resistors RS and Ru, and the RS is connected with an output terminal; the 3 pin and the 4 pin of the bidirectional optocoupler are grounded, the 2 pin is connected with the resistor RS, the 6 pin is connected with the resistor Ru and the CPU, and the CPU is connected with the buzzer;
The second control system further comprises a live detection module, wherein the live detection module comprises a two-way optocoupler II, resistors RS1 and RS2, two resistors Ru, a MOS tube and a two-way stabilizing tube; the 3 pin of the two-way optical coupler is grounded, the 1 pin is connected with the resistor RS2, the 6 pin is connected with the resistor Ru, the D end of the MOS tube is connected with the other resistor Ru, the G end is connected with the resistor RS1, and the S end is grounded; the bidirectional stabilizing tube is respectively connected with the D end and the G end of the MOS tube;
the host computer edits characters through the operation keyboard, displays the information of the cable to be checked on a liquid crystal screen, and sends the information to the slave computer; and the slave receives the information of the cable to be checked, checks the information, and displays a check result on the liquid crystal screen.
2. The secondary cable gauge of claim 1 wherein: the first wiring port comprises a multipath transmitting port, a voice wiring port and a grounding port.
3. The secondary cable gauge of claim 2 wherein: the second wiring port comprises a multipath receiving port, a voice wiring port and a grounding port.
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| CN202111273958.4A CN113884836B (en) | 2021-10-29 | 2021-10-29 | Cable secondary line calibrator |
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| CN202111273958.4A CN113884836B (en) | 2021-10-29 | 2021-10-29 | Cable secondary line calibrator |
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| CN113884836B true CN113884836B (en) | 2024-07-05 |
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|---|---|---|---|---|
| CN106872841A (en) * | 2017-02-21 | 2017-06-20 | 北京软控伟业科技有限公司 | A kind of wire and school linear system are united |
| CN208443947U (en) * | 2018-04-25 | 2019-01-29 | 国网山东省电力公司菏泽供电公司 | A kind of multi-functional wire of novel intelligent based on code communication |
| CN208969184U (en) * | 2018-09-11 | 2019-06-11 | 深圳Tcl新技术有限公司 | A kind of electric-leakage detection circuit, device and distribution box |
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| CN113884836A (en) | 2022-01-04 |
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