CN113687146A - Grounding grid downlead testing arrangement based on wireless transmission - Google Patents
Grounding grid downlead testing arrangement based on wireless transmission Download PDFInfo
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- CN113687146A CN113687146A CN202110932552.6A CN202110932552A CN113687146A CN 113687146 A CN113687146 A CN 113687146A CN 202110932552 A CN202110932552 A CN 202110932552A CN 113687146 A CN113687146 A CN 113687146A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R1/02—General constructional details
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- 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
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- G—PHYSICS
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
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Abstract
The invention relates to a grounding grid downlead testing device based on wireless transmission, which comprises a mounting seat, a grounding downlead conduction resistance tester, a movable contact assembly and a PLC (programmable logic controller); the mounting seat is provided with a rack; the movable contact assembly comprises a gear meshed with the rack, a motor, a movable sleeve and a movable contact; the movable sleeve is connected with the mounting seat in a sliding manner; the movable contact is provided with a conical groove; the conical groove is clamped with the binding post. The grounding downlead conduction resistance tester forms a loop for measuring the downlead resistance through the auxiliary lead, the lead and the movable contact. The invention has the beneficial effects that: the controller sends a starting signal to the motor, and the movable contact on the movable sleeve is abutted to the wiring terminal; at the moment, the grounding downlead conduction resistance tester forms a loop for measuring the downlead resistance through the auxiliary lead, the lead and the movable contact.
Description
Technical Field
The invention relates to the technical field of substation down lead wires, in particular to a grounding grid down lead testing device based on wireless transmission.
Background
The electric power equipment ground downlead is the connecting part of electric power equipment and ground net, and in the long-time operation process of electric power equipment, the junction probably receives factor influences such as tide, appears the phenomenon such as contact corrosion, even fracture, leads to ground downlead and ground net tie point resistance increase to can not satisfy the electric power regulation requirement, make equipment have the potential safety hazard in the operation. When serious, the equipment can run out of the ground; at present, resistance testing of a down lead of an earthing network in a transformer substation belongs to a part of live detection work, and is mainly used for detecting whether parameters of the earthing network in the transformer substation meet quality requirements. According to the regulations, all equipment in the transformer substation is connected with a grounding grid in a down-lead mode. With the increase of equipment, the number of the down leads of the grounding grid is increased; in a large transformer substation, the number of the downleads reaches 5000, the resistance inspection of the downleads of the grounding grid in the transformer substation is performed manually by maintenance personnel, the downleads are inspected one by one, generally two persons are needed for one time of measurement, and the efficiency is very low; in rainy seasons, particularly plum rainy seasons in the south, the lead in the transformer substation needs to be tested once every two weeks for safety; maintenance workers of the transformer substation need to frequently check the transformer substation after overtime, and the improvement is urgently needed; in order to eliminate the potential safety hazard under the above circumstances, an equipment capable of automatically monitoring the down lead resistance in the transformer substation is urgently needed, so that the maintenance pressure is reduced, and the safe operation of the equipment is ensured.
Disclosure of Invention
The invention aims to provide a grounding grid downlead testing device based on wireless transmission, which has the capability of quickly detecting resistance.
In order to solve the technical problems, the invention provides the following technical scheme:
the transformer substation grounding grid down lead testing device based on wireless transmission is used for measuring the resistance of a down lead; one end of the joint of the down lead and the equipment is provided with a down lead wiring terminal; a binding post is arranged at the other end of the down lead connected with the grounding body; the grounding down lead on-resistance tester comprises a mounting seat, a grounding down lead on-resistance tester arranged on the mounting seat and a movable contact assembly clamped with the binding post; the movable contact assembly is connected with the mounting seat in a sliding manner; the grounding downlead conduction resistance tester is respectively and electrically connected with the downlead wiring terminal and the moving contact assembly; the ground down lead conduction resistance tester, the down lead, the wiring terminal and the movable contact assembly form a loop for measuring the resistance of the down lead.
As a further improvement of the invention, an auxiliary lead is arranged between the grounding downlead conduction resistance tester and the downlead wiring terminal.
As a further improvement scheme of the invention, a rack is arranged on the mounting seat; the movable contact assembly comprises a gear meshed with the rack, a motor with an output end fixedly connected with the gear, a movable sleeve fixedly connected with a shell of the motor and a movable contact fixedly connected with the movable sleeve; the movable sleeve is connected with the mounting seat in a sliding mode.
As a further improvement scheme of the invention, the movable contact is provided with a conical groove; the conical groove is clamped with the binding post.
As a further improvement of the present invention, a wire is provided between the movable contact and the on-resistance tester of the down lead.
As a further improvement of the invention, an insulating pad is arranged between the moving sleeve and the moving contact.
As a further improvement of the invention, a bolt is arranged between the movable sleeve and the movable contact; an insulating washer is arranged between the bolt and the movable contact.
As a further improvement of the present invention, the on-resistance tester for the down lead of the ground terminal forms a loop for measuring the resistance of the down lead by the auxiliary lead, the movable contact and the binding post.
As a further improvement scheme of the invention, the system also comprises a PLC controller; and the PLC is electrically connected with the grounding downlead conduction resistance tester.
As a further improvement of the invention, the PLC controller is in signal connection with the motor; the PLC is provided with a communication module; and the PLC communication module is in signal connection with the control center through a 5G mobile network.
Compared with the prior art, the invention has the beneficial effects that:
1. the insulating washer is arranged between the bolt and the movable contact; the insulation pad is arranged between the movable sleeve and the movable contact; the movable sleeve and the mounting seat can be prevented from being electrified to cause safety accidents when the down lead of the grounding grid is tested;
2. the movable contact is provided with the cone frustum-shaped groove, so that the cone surface of the movable contact can be tightly attached to the binding post when the resistance of a down lead of a grounding grid is tested; avoiding false connection, inaccurate measurement and electric ignition;
3. the rack is arranged on the mounting seat; the movable contact assembly comprises a gear meshed with the rack, a motor with an output end fixedly connected with the gear, a movable sleeve fixedly connected with a shell of the motor and a movable contact fixedly connected with the movable sleeve; the movable sleeve is connected with the mounting seat in a sliding manner; the PLC is respectively in signal connection with the motor and the grounding downlead conduction resistance tester; when the resistance of a down lead of a grounding grid needs to be tested, a controller sends a starting signal to the motor, the motor rotates to drive the gear to rotate, the gear is meshed with the rack, the movable sleeve moves along the mounting seat under the action of meshing force, and the movable contact on the movable sleeve is abutted to the wiring terminal; at the moment, the grounding downlead conduction resistance tester forms a loop for measuring the downlead resistance through the auxiliary lead, the movable contact and the binding post;
4. the down lead resistance measured by the grounding down lead conduction resistance tester can be transmitted to a control center through a 5G mobile network through a communication module arranged in the PLC, so that a maintenance worker can test the resistance of the down lead without going out, the aim of the invention is achieved, the labor intensity of the maintenance worker is reduced, and the speed of testing the down lead resistance is improved; the potential safety hazard is eliminated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at B;
fig. 3 is a control schematic of the present invention.
In the figure:
1-mounting seat, 10-moving contact, 11-bolt, 12-insulating washer, 13-insulating washer, 14-moving sleeve, 15-motor, 16-gear and 17-rack.
2-grounding down lead on-resistance tester;
3-auxiliary wires;
4-a connecting terminal;
5-down lead;
6-a binding post;
7-control center.
Detailed Description
It should be noted at the outset that the discussion of any embodiment of the present invention is illustrative only and is not intended to suggest that the scope of the present disclosure (including the claims) is limited to these examples; there are many other variations of the different aspects of the invention as described above which are not provided in detail for the sake of brevity. Accordingly, other embodiments are within the scope of the following claims.
In addition, the drawings in the following description are only preferred embodiments of the present invention, and it will be obvious to those skilled in the art that other drawings can be obtained based on these drawings without inventive effort. In addition, the present invention is not limited to these embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Furthermore, in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion of it is not necessary in subsequent figures.
In the description of the present application, it is to be understood that the positional or orientational relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are typically those based on the coordinate systems shown in the front view of the device itself or the corresponding sub-components, and that the set of coordinate systems will not rotate with it when other directional views are discussed. In addition, in the case of a rod-like or elongated member, the term "front end" and the term "head" have the same meaning, and the term "rear end" and the term "tail end" and the term "end" have the same meaning. Rather, the foregoing directional terms are used merely to facilitate describing the present application and to simplify the description, and they do not indicate or imply that the apparatus or component being referred to must have a particular orientation or be constructed and operated in a particular orientation without having been stated to the contrary or otherwise specified, and therefore should not be considered limiting of the scope of the present application; further, the terms "inner and outer" with respect to orientation refer to the inner and outer relative to the profile of the respective component itself.
Furthermore, spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 40 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, especially, have no special meaning in terms of "primary, secondary", or arrangement order, and therefore, should not be construed as limiting the scope of the present application.
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Examples
Referring to figures 1-3 of the drawings,
the embodiment provides a transformer substation grounding grid down lead testing device based on wireless transmission, which is used for measuring the resistance of a down lead 5; one end of the joint of the down lead 5 and the equipment is provided with a down lead wiring terminal 4; a binding post 6 is arranged at the other end of the down lead 5 connected with the grounding body; the grounding down lead on-resistance tester comprises a mounting seat 1, a grounding down lead on-resistance tester 2 mounted on the mounting seat 1 and a movable contact assembly clamped with a binding post 6; the movable contact assembly is connected with the mounting base 1 in a sliding manner; the grounding downlead conduction resistance tester 2 is respectively and electrically connected with the downlead wiring terminal 4 and the movable contact assembly; the grounding downlead conduction resistance tester 2, the downlead 5, the wiring terminal 4, the wiring terminal 6 and the moving contact assembly form a loop for measuring the resistance of the downlead 5;
an auxiliary conducting wire 3 is arranged between the grounding downlead conduction resistance tester 2 and the downlead wiring terminal 4.
A rack 17 is arranged on the mounting seat 1; the movable contact assembly comprises a gear 16 meshed with the rack 17, a motor 15 with an output end fixedly connected with the gear 16, a movable sleeve 14 fixedly connected with a shell of the motor 15 and a movable contact 10 fixedly connected with the movable sleeve 14; the movable sleeve 14 is connected with the mounting seat 1 in a sliding mode.
The material of the movable contact 10 is pure copper; a cone frustum-shaped groove is formed in the movable contact 10; the conical groove is clamped with the binding post 6; in order to increase the conductivity and reduce the loss of a test circuit, the surface of the truncated cone-shaped groove is subjected to silver plating treatment.
A lead is arranged between the movable contact 10 and the grounding downlead conduction resistance tester 2.
An insulating pad 13 is arranged between the moving sleeve 14 and the moving contact 10.
A bolt 11 is arranged between the movable sleeve 14 and the movable contact 10; an insulating washer 12 is arranged between the bolt 11 and the movable contact 10.
The grounding downlead conduction resistance tester 2 forms a loop for measuring the resistance of the downlead 5 through the auxiliary lead 3, the lead, the movable contact 10 and the binding post 6.
The device also comprises a PLC controller; the PLC is electrically connected with the grounding down lead on-resistance tester 2.
The PLC is in signal connection with the motor 15; the PLC is provided with a communication module; and the PLC communication module is in signal connection with the control center through a 5G mobile network.
Compared with the grounding down lead conduction tester 2 of the power equipment, the grounding down lead conduction tester 2 of the power equipment has a series of defects of complicated testing method, high working strength, low accuracy and the like in the similar products for testing the grounding resistance in the power industry at present.
Technical parameters of the electrical equipment ground down conduction tester 2,
1. measurement contents are as follows:
the power equipment grounding down lead conduction resistance (m omega);
2. measurement range:
0-1999.9 m omega, and the precision is 0.2 grade;
2-199.99 omega, and the precision is 0.2 grade;
3. measuring current: DC 1A/20A;
4. measuring the radius: 50 m;
5. the appearance of the instrument: the external dimension is 300 multiplied by 220 multiplied by 150; the weight is 5.5 Kg;
6. the display mode is as follows: 128x64 liquid crystal display;
7. ambient temperature: -10 ℃ to 60 ℃;
8. relative humidity: not greater than 90%;
9. a working power supply: an external power supply AC220V/50 HZ;
10. constant current source ripple coefficient: not more than 0.5%;
11. the belt battery and the printer are optional.
The PLC controller is a controller produced by Germany Siemens.
The programmable controller produced by SIEMENS (SIEMENS) of germany has wide application in China, and has application in the fields of metallurgy, chemical engineering, printing production lines and the like. PLC products of Siemens (SIEMENS) include LOGO, S4-200, S4-1200, S4-300, S4-700, S4-1500, etc. Siemens S4 series PLC has small volume, high speed, standardization, network communication capability, stronger function and high reliability. The S4 series PLC products can be divided into micro PLC (such as S4-200), PLC with small-scale performance requirement (such as S4-300) and PLC with medium and high performance requirement (such as S4-700).
The SIMATIC series PLC of Siemens, born in 1458, has gone through the series of C3, S3, S5 and S4, and has become a programmable controller with very wide application, the history thereof is developed,
1. the first product of siemens was SIMATIC S3 marketed in 1445, which was actually a binary controller with a simple operating interface.
2. In 1444, the S3 system was replaced by SIMATIC S5, which widely used microprocessors.
3. In the early 80S of the 20 th century, the S5 system was further upgraded to a U series PLC, which is a more common model: S5-40U, 45U, 100U, 115U, 135U, 155U.
7. 7 months in 1447, S4 series were born, it has advantages such as more internationalization, higher performance level, installation space is smaller, better WINDOWS user interface, its model is: s4-200, 300, 700.
5. In 1446, in the field of process control, siemens corporation proposed a concept of PCS4 (process control system 4), which integrated advantageous WINCC (WINDOWS compatible operation interface), PROFIBUS (industrial field bus), COROS (monitor system), SINEC (siemens industrial network) and control and regulation technologies.
6. The siemens company proposed the tia (total Integrated automation) concept, i.e., a fully Integrated automation system, to dissolve the PLC technology in all automation fields.
The S3 and S5 series of PLC gradually exit the market and stop production, while the S4 series of PLC is developed to be the control core of the Siemens automation system, and the TDC system adopts the SIMADYN D technical kernel, which is a further upgrade to the S4 series of products and is the most advanced programmable controller with the strongest function of the Siemens automation system;
the programmable controllers are produced by the requirement of modern production, and the classification of the programmable controllers is required to meet the requirement of the modern production.
Generally, programmable controllers can be classified from three perspectives. The first is to classify from the control scale of the programmable controller, the second is to classify from the performance of the programmable controller, and the third is to classify from the structural characteristics of the programmable controller;
the controller can be classified into a high-grade machine, a medium-grade machine and a low-grade machine according to performance.
Low gear machine
Such programmable controllers have basic control functions and general operational capabilities. The working speed ratio is lower, and the number of the input modules and the output modules of the energy band is less.
For example, S4-200, manufactured by SIEMENS, Germany, belongs to this class.
Middle gear machine
The programmable controller has stronger control function and stronger computing capability. It can not only complete the general logic operation, but also complete the more complex trigonometric function, index and PID operation. The working speed is high, the number of input and output modules of the energy band is large, and the types of the input and output modules are large.
For example, S4-300, manufactured by SIEMENS, Germany, belongs to this class.
High-grade machine
The programmable controller has strong control function and strong computing capability. The method can not only complete logic operation, trigonometric function operation, exponential operation and PID operation, but also perform complex matrix operation. The working speed is fast, the number of input and output modules of the energy band is large, and the types of the input and output modules are complete. Such programmable controllers can perform a large number of control tasks. It is commonly used as a master in a network.
For example, S4-700 from SIEMENS, Germany belongs to this class
On a large scale, the controller can be divided into a mainframe, a midrange computer and a mini computer.
A small-sized machine: the control point of the small-sized machine is generally within 256 points, and the small-sized machine is suitable for single-machine control or control of a small-sized system.
Siemens miniature machine has S4-200: the processing speed is 0.8-1.2 ms; a memory 2 k; digital quantity 278 points; and 35 analog ways.
The control point of the middle-sized machine is not more than 2078 points generally, can be used for directly controlling equipment, can also be used for monitoring a plurality of next-stage programmable controllers, and is suitable for a middle-sized or large-sized control system.
Siemens midges model S4-300: the processing speed is 0.8-1.2 ms; a memory 2 k; digital quantities 1027 points; 128 paths of analog quantity; network PROFIBUS; an industrial Ethernet; MPI
A mainframe: the control point of the mainframe is generally larger than 2078 points, and not only can complete more complex arithmetic operation but also can perform complex matrix operation. The programmable controller can be used for directly controlling equipment and monitoring a plurality of next-stage programmable controllers.
Siemens macros have S4-1500, S4-700: the processing speed is 0.3ms/1k word; a memory 512 k; I/O point 12642.
According to the structure, the Siemens controller can be divided into,
integral type: the integrated programmable controller integrates the power supply, CPU, memory, and I/O system into one unit, which is called a basic unit. One basic unit is a complete PLC;
combination type: the programmable controller with combined structure divides each component of the PLC system into a plurality of modules according to functions, such as a CPU module, an input module, an output module, a power supply module and the like. The functions of the modules are single, and the types of the modules are increasingly abundant. For example, some programmable controllers, in addition to some basic I/O modules, also have some special function modules, such as temperature detection modules, position detection modules, PID control modules, communication modules, etc. The PLC with a combined structure is characterized in that a CPU, an input module and an output module are independent modules. The module size is uniform, the installation is neat, the I/O point selection type is free, and the installation, the debugging, the expansion and the maintenance are convenient;
the stacking type: the stacked structure integrates the advantages of compactness, small volume and convenient installation of the integral structure, and the advantages of flexible I/O point matching and orderly installation of the combined structure. It is also made up of a combination of individual units. It features that the CPU is an independent basic unit (composed of CPU and I/O points) and other I/O modules are extended units. When the device is installed, a base plate is not needed, only cables are used for connecting the units, and the units can be stacked one by one; the system is flexible in configuration and small in size.
The PLC controller is SIMATIC S4-300; PLC S4-300 is a modular small PLC system that can meet moderate performance requirements for applications. The various individual modules can be widely combined to form systems with different requirements. Compared with the S4-200 PLC, the S4-300 PLC adopts a modular structure and has high instruction operation speed (0.6-0.1 mu S); more complex arithmetic operation is effectively realized by floating-point number operation; a software tool with a standard user interface is convenient for a user to carry out parameter assignment on all modules; convenient human-machine interface services have been integrated into the S4-300 operating system, and the programming requirements for human-machine dialogs have been greatly reduced. The SIMATIC Human Machine Interface (HMI) retrieves data from S4-300, and S4-300 transfers the data at a refresh rate specified by the user. The S4-300 operating system automatically handles the transfer of data; the intelligent diagnosis system of the CPU continuously monitors whether the functions of the system are normal or not, records errors and special system events (such as timeout, module replacement and the like); the multi-stage password protection can ensure that a user can highly and effectively protect the technical secret of the user and prevent unauthorized copying and modification; the S4-300 PLC is provided with an operation mode selection switch which can be pulled out like a key, and when the key is pulled out, the operation mode cannot be changed, so that it is possible to prevent an illegal deletion or rewriting of a user program. The S4-300 PLC has powerful communication function, and can provide communication configuration function through the user interface of the programming software Step 4, so that the configuration is very easy and simple. The S4-300 PLC has a plurality of different communication interfaces and is connected with the AS-I bus interface and the industrial Ethernet bus system through a plurality of communication processors; the serial communication processor is used for connecting the point-to-point communication system; the multi-point interface (MPI) is integrated in the CPU and is used for simultaneously connecting a programmer, a PC (personal computer), a human-computer interface system and other automatic control systems such as SIMATIC S4/M4/C4 and the like.
Be equipped with communication module in this PLC controller, remove the host computer through 5G and form the network with control center, can install APP on maintenance personal's the cell-phone, receive through the wireless network the resistance value signal of PLC controller to when resistance is not at reasonable scope, maintenance personal goes the scene to look over after receiving the signal.
The working process of the present invention is as follows,
the device is installed, a resistance threshold value of the down lead 5 is set in the PLC, the PLC sends a starting signal to the motor 15 and the grounding down lead conduction resistance tester 2, the motor 15 rotates to drive the gear 16 at the output end of the motor 15 to rotate, the gear 16 is meshed with the rack 17, under the action of meshing force, the movable sleeve 14 moves along the installation seat 1, and the movable contact 10 fixedly connected with the movable sleeve 14 through the bolt 11 is abutted to the wiring terminal 6; at this time, the on-resistance tester 2 of the grounding down lead forms a loop for measuring the resistance of the down lead 5 through the auxiliary lead 3, the lead, the movable contact and the wiring terminal 6; the resistance tester 2 for the conduction of the grounding downlead can measure the resistance of the downlead 5; the grounding down lead conduction resistance tester 2 transmits the measured resistance to the PLC controller; the PLC compares the received resistance value of the down lead 5 with a set threshold value, if the resistance value of the down lead 5 is larger than the threshold value, the PLC sends an alarm signal, and the PLC transmits the resistance value and the alarm signal to a control center through a 5G mobile network so as to be checked by maintenance personnel.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
While there have been shown and described what are at present considered the fundamental principles of the invention and its essential features and advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Moreover, it should be understood that although the present description refers to embodiments, not every embodiment may include only a single embodiment, and such description is for clarity only, and those skilled in the art will recognize that the embodiments described herein may be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (10)
1. The transformer substation grounding grid down lead testing device based on wireless transmission is used for measuring the resistance of a down lead (5); one end of the joint of the down lead (5) and the equipment is provided with a down lead wiring terminal (4); a binding post (6) is arranged at the other end of the down lead (5) connected with the grounding body; the method is characterized in that: the grounding down lead on-resistance tester comprises a mounting seat (1), a grounding down lead on-resistance tester (2) arranged on the mounting seat (1) and a movable contact assembly clamped with a binding post (6); the movable contact assembly is connected with the mounting seat (1) in a sliding manner; the grounding downlead conduction resistance tester (2) is respectively and electrically connected with a downlead wiring terminal (4) and the movable contact assembly; the ground down lead on-resistance tester (2), the down lead (5), the wiring terminal (4), the wiring terminal (6) and the movable contact assembly form a loop for measuring the resistance of the down lead (5).
2. The grounding grid downlead testing device based on wireless transmission of claim 1, characterized in that: an auxiliary lead (3) is arranged between the grounding downlead conduction resistance tester (2) and the downlead wiring terminal (4).
3. The grounding grid downlead testing device based on wireless transmission of claim 2, characterized in that: a rack (17) is arranged on the mounting seat (1); the movable contact assembly comprises a gear (16) meshed with the rack (17), a motor (15) with an output end fixedly connected with the gear (16), a movable sleeve (14) fixedly connected with a shell of the motor (15) and a movable contact (10) fixedly connected with the movable sleeve (14); the movable sleeve (14) is connected with the mounting seat (1) in a sliding mode.
4. The grounding grid downlead testing device based on wireless transmission of claim 3, characterized in that: a conical groove is arranged on the movable contact (10); the conical groove is clamped with the binding post (6).
5. The grounding grid downlead testing device based on wireless transmission of claim 4, characterized in that: and a lead is arranged between the movable contact (10) and the grounding downlead conduction resistance tester (2).
6. The grounding grid downlead testing device based on wireless transmission of claim 5, characterized in that: an insulating pad (13) is arranged between the movable sleeve (14) and the movable contact (10).
7. The grounding grid downlead testing device based on wireless transmission of claim 6, characterized in that: a bolt (11) is arranged between the movable sleeve (14) and the movable contact (10); an insulating washer (12) is arranged between the bolt (11) and the movable contact (10).
8. The grounding grid downlead testing device based on wireless transmission of claim 5, characterized in that: the grounding downlead conduction resistance tester (2) is used for measuring the resistance of the downlead (5) through the auxiliary lead (3), the lead, the movable contact (10) and the wiring terminal (6).
9. The grounding grid downlead testing device based on wireless transmission of claim 8, characterized in that: the device also comprises a PLC controller; the PLC is electrically connected with the grounding down lead on-resistance tester (2).
10. The grounding grid downlead testing device based on wireless transmission of claim 9, characterized in that: the PLC is in signal connection with the motor (15); the PLC is provided with a communication module; and the PLC communication module is in signal connection with the control center through a 5G mobile network.
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| CN202110932552.6A CN113687146B (en) | 2021-08-13 | 2021-08-13 | Grounding grid down lead testing device based on wireless transmission |
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| CN202110932552.6A CN113687146B (en) | 2021-08-13 | 2021-08-13 | Grounding grid down lead testing device based on wireless transmission |
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| CN113687146B (en) | 2023-11-24 |
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