CN113161874A - Grounding system of motor transmission system - Google Patents
Grounding system of motor transmission system Download PDFInfo
- Publication number
- CN113161874A CN113161874A CN202011403116.1A CN202011403116A CN113161874A CN 113161874 A CN113161874 A CN 113161874A CN 202011403116 A CN202011403116 A CN 202011403116A CN 113161874 A CN113161874 A CN 113161874A
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- Prior art keywords
- grounding
- power cable
- transmission
- cabinet
- transmission power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/40—Connection to earth
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The application discloses motor drive system's ground system includes: the transmission system control cabinet comprises a system control cabinet and an isolation switch cabinet corresponding to the system control cabinet; a transmission power cable shielding wire is led out from the isolation switch cabinet; the transmission power cable shielding wire is connected with a special grounding guide plate; the transmission power cable shielding wire is separated and isolated from the transmission control component and the cabinet body in a grounding way. This application is newly-increased independent transmission power cable shielded wire, and drive control components and parts and cabinet body ground connection part completely, and the induced voltage that makes transmission power cable shielded wire produce no longer disturbs the equipment that control components and parts and cabinet body ground connection are connected, has avoided arousing main motor drive control system communication fault to report to the police, and the control panel that no longer burns out transmission system easily causes the unit to shut down, has eliminated the interference between the ground connection system, reduces the fault rate, improves the ground connection effect.
Description
Technical Field
The invention relates to the field of metallurgical transmission system equipment, in particular to a grounding system of a motor transmission system.
Background
The main motor transmission system is a key device for cold rolling and mainly has the functions that the transmission system is communicated with a control system PLC to drive a motor on a machine line to rotate and transmit strip steel and rolled strip steel. The voltage of a power cable of a main motor transmission system is AC400V when the voltage is low, and AC3300V when the voltage is high, as shown in figure 1, a control component and a cabinet body grounding (EB) on a main motor transmission cabinet in the original design are led out with a power cable shielding wire grounding (EBX), the grounding resistance is less than 10 omega, and the EB and EBX are led to the same embedded grounding copper plate outdoors together.
Under the condition that the unit normally operates, the induction voltage of the power cable shielding wire can reach hundreds of volts at most sometimes, the induction voltage is easy to interfere with control components and equipment connected with the cabinet body in a grounding mode, communication fault alarming of a main motor transmission control system is finally caused, the control panel of the transmission system is easy to burn down to cause unit halt, the production efficiency of the whole unit is seriously influenced, and therefore the grounding transformation of the unit transmission control system is imperative.
Disclosure of Invention
In view of this, the present invention provides a grounding system for a motor transmission system, which eliminates interference between grounding systems, reduces failure rate, and improves grounding effect. The specific scheme is as follows:
a grounding system for an electric motor drive system, comprising: the transmission system control cabinet comprises a system control cabinet and an isolation switch cabinet corresponding to the system control cabinet;
a transmission power cable shielding wire is led out from the isolation switch cabinet;
the transmission power cable shielding wire is connected with a special grounding guide plate;
the transmission power cable shielding wire is separated and isolated from the transmission control component and the cabinet body in a grounding way.
Optionally, the ground plate is a ground copper plate.
Optionally, the grounding resistance value of the grounding copper plate and the transmission power cable shielding wire is less than 10 Ω.
Optionally, the distance between the ground copper plate and the transmission control component and between the ground copper plate and the ground guide plate of the cabinet body is greater than 100 meters.
Optionally, the transmission power cable shielding wire is connected with the corresponding transmission power cable shielding wire in the isolation switch cabinet through a grounding flat steel and a wiring terminal box.
In the present invention, a grounding system of a motor drive system comprises: the transmission system control cabinet comprises a system control cabinet and an isolation switch cabinet corresponding to the system control cabinet; a transmission power cable shielding wire is led out from the isolation switch cabinet; the transmission power cable shielding wire is connected with a special grounding guide plate; the transmission power cable shielding wire is separated and isolated from the transmission control component and the cabinet body in a grounding way.
The invention adds the independent transmission power cable shielding wire, completely separates from the transmission control component and the cabinet body grounding, so that the induced voltage generated by the transmission power cable shielding wire can not interfere with the control component and the equipment connected with the cabinet body grounding, thereby avoiding the communication fault alarm of the transmission control system of the main motor, avoiding the machine set halt caused by the control board of the transmission system being easily burnt, eliminating the interference between grounding systems, reducing the fault rate and improving the grounding effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a grounding system of a motor drive system in the prior art.
FIG. 2 is a schematic diagram of a grounding system of a motor transmission system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a grounding system of another motor transmission system according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a grounding system of a motor transmission system, which is shown in figures 2 and 3 and comprises: the transmission system control cabinet 1 comprises a system control cabinet 11 and an isolation switch cabinet 12 corresponding to the system control cabinet 11;
a transmission power cable shield wire EBX is led out from the isolating switch cabinet 12;
the transmission power cable shielding wire EBX is connected with a special grounding guide plate 2;
the transmission power cable shielding wire EBX is separated and isolated from the transmission control component and the cabinet body grounding EB.
Specifically, in order to avoid the influence of the transmission control components and the cabinet body of the motor transmission system on the grounding of the transmission power, the transmission power system singly leads out a transmission power cable shielding wire EBX, and the transmission control components and the cabinet body continue to use the original transmission control components and cabinet body grounding EB device, which comprises the original grounding wire and a grounding guide plate 3.
Specifically, the motor drive system may include a plurality of system control cabinets 11, each drive system control cabinet 1 includes one system control cabinet 11 and one or more corresponding isolation switch cabinets 12, each system control cabinet 11 may correspond to one or more isolation switch cabinets 12, for example, the system control cabinet 11 in the coiler drive system control cabinet 1 may correspond to two isolation switch cabinets 12, a drive power cable shield line EBX is led out from each isolation switch cabinet 12 separately, the drive power cable shield line EBX is dedicated to the ground setting of the drive power system, and the drive power cable shield line EBX is connected to the dedicated ground guide 2, the drive power cable shield lines EBX of the isolation switch cabinets 12 are uniformly wired, the same drive power cable shield line EBX and the same ground guide 2 are used, the drive power systems in the drive system control cabinets 1 are grounded together, the transmission control component and the cabinet body are grounded.
Specifically, when facing the motor transmission system shown in fig. 2, 1000 × 2000 × 10mm grounded copper plates, 500 meters of grounding cables with 120 square millimeters, 50 meters of grounded flat steels, several wire noses of 120, 1 of 600 × 400 wiring terminal boxes, several galvanized bolts of M12, several insulating tapes and the like can be selected, when in specific installation, the transmission power cable shielding wires EBX can be separated from the transmission control components and the cabinet body grounding EB, all the shielding wires of the transmission power cable are led out and connected to the newly added grounding cable, so that the transmission power cable shielding wires EBX are connected with the corresponding shielding wires of the transmission power cable in the isolating switch cabinet 12 through the grounded flat steels and the wiring terminal boxes, then the edges of the 1000 × 2000 × 20mm copper plates are provided with circular phi 14 holes to fasten the transmission power cable shielding wires EBX grounding cables, pressing the head of the transmission power cable shielding wire EBX to the wire nose, fastening the head of the transmission power cable shielding wire EBX to a round phi 14 hole at the edge of a copper plate by using a galvanized bolt M12, burying the copper plate connected with the grounding cable outside a factory, and finally testing whether the grounding resistance is less than 10 omega, wherein if the grounding resistance is less than 10 omega, the grounding cable can be used, and if the grounding cable is not less than 10 omega, the parameters of the grounding cable, the grounding copper plate and the like need to be readjusted until the grounding resistance of the grounding copper plate and the transmission power cable shielding wire EBX is less than 10 omega, so that the design requirement is.
Specifically, the control components, the cabinet body grounding and the transmission power cable shielding line EBX are respectively connected to different grounding embedded copper plates, so that the equipment on the transmission control components, the cabinet body grounding EB terminal and the transmission power cable shielding line EBX grounding terminal is well grounded. In order to prevent the newly-added grounding system from interfering with the original grounding system, the distance between the grounding copper plate and the transmission control component and between the grounding copper plate and the cabinet body grounding EB guide plate is more than 100 meters. Therefore, the induced voltage on the transmission power cable shielding wire EBX is completely and independently led into the ground, the mutual interference of an equipment grounding system is eliminated, the reliable operation of a transmission control system is improved, and the fault time is greatly reduced.
Referring to fig. 2, EBX represents a newly added transmission power grounding system, including a grounding guide plate 2 and a transmission power cable shielding wire with a dotted line, EB represents a transmission control component and a cabinet body grounding, including a transmission control component and a cabinet body grounding guide plate 3, and a transmission control component and a cabinet body grounding wire with a solid line.
Therefore, the embodiment of the invention adds the independent transmission power cable shielding wire EBX which is completely separated from the transmission control component and the cabinet body grounding EB, so that the induced voltage generated by the transmission power cable shielding wire EBX can not interfere with the control component and the equipment connected with the cabinet body grounding EB any more, thereby avoiding the communication fault alarm of the transmission control system of the main motor, avoiding the machine set halt caused by the control panel of the transmission system being easily burnt, eliminating the interference between the grounding systems, reducing the fault rate and improving the grounding effect.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The technical content provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the above description of the examples is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (5)
1. An electrical machine drive system grounding system, comprising: the transmission system control cabinet comprises a system control cabinet and an isolation switch cabinet corresponding to the system control cabinet;
a transmission power cable shielding wire is led out from the isolation switch cabinet;
the transmission power cable shielding wire is connected with a special grounding guide plate;
the transmission power cable shielding wire is separated and isolated from the transmission control component and the cabinet body in a grounding way.
2. The grounding system of an electric motor drive system of claim 1, wherein the grounding plate is a copper grounding plate.
3. The grounding system of an electric motor drive system according to claim 2, wherein the grounding resistance value of the grounding copper plate and the transmission power cable shield wire is less than 10 Ω.
4. The grounding system of the motor transmission system according to claim 3, wherein the distance between the grounding copper plate and the transmission control component and the cabinet grounding guide plate is greater than 100 meters.
5. The motor drive system grounding system of claim 4, wherein the drive power cable shield wires are connected to the shield wires of the respective drive power cables in the isolation switch cabinet by a grounding flat steel and a terminal box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403116.1A CN113161874A (en) | 2021-03-01 | 2021-03-01 | Grounding system of motor transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403116.1A CN113161874A (en) | 2021-03-01 | 2021-03-01 | Grounding system of motor transmission system |
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| Publication Number | Publication Date |
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| CN113161874A true CN113161874A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011403116.1A Pending CN113161874A (en) | 2021-03-01 | 2021-03-01 | Grounding system of motor transmission system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002281765A (en) * | 2001-03-21 | 2002-09-27 | Meidensha Corp | Power conversion facility |
| CN101217261A (en) * | 2007-12-26 | 2008-07-09 | 广州文冲船厂有限责任公司 | A high-power frequency speed control system of high pressure jet water pump of dredger |
| CN201667611U (en) * | 2010-03-25 | 2010-12-08 | 江苏新大石油技术服务有限公司 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
| CN201829938U (en) * | 2010-10-18 | 2011-05-11 | 洛阳栾川钼业集团股份有限公司 | Independent grounding wire for high-voltage cable |
| CN202931187U (en) * | 2012-08-28 | 2013-05-08 | 云南省曲靖双友钢铁有限公司 | Circuit preventing PLC control system from being interfered by frequency converter |
| CN111005255A (en) * | 2019-11-12 | 2020-04-14 | 中山大学新华学院 | Paper machine transmission control system |
-
2021
- 2021-03-01 CN CN202011403116.1A patent/CN113161874A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002281765A (en) * | 2001-03-21 | 2002-09-27 | Meidensha Corp | Power conversion facility |
| CN101217261A (en) * | 2007-12-26 | 2008-07-09 | 广州文冲船厂有限责任公司 | A high-power frequency speed control system of high pressure jet water pump of dredger |
| CN201667611U (en) * | 2010-03-25 | 2010-12-08 | 江苏新大石油技术服务有限公司 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
| CN201829938U (en) * | 2010-10-18 | 2011-05-11 | 洛阳栾川钼业集团股份有限公司 | Independent grounding wire for high-voltage cable |
| CN202931187U (en) * | 2012-08-28 | 2013-05-08 | 云南省曲靖双友钢铁有限公司 | Circuit preventing PLC control system from being interfered by frequency converter |
| CN111005255A (en) * | 2019-11-12 | 2020-04-14 | 中山大学新华学院 | Paper machine transmission control system |
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Application publication date: 20210723 |