CN107271944B - Full-automatic wiring device of program-controlled current transformer - Google Patents
Full-automatic wiring device of program-controlled current transformer Download PDFInfo
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- CN107271944B CN107271944B CN201710432187.6A CN201710432187A CN107271944B CN 107271944 B CN107271944 B CN 107271944B CN 201710432187 A CN201710432187 A CN 201710432187A CN 107271944 B CN107271944 B CN 107271944B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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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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Abstract
The invention discloses a full-automatic wiring device of a program-controlled current transformer, which comprises: the system comprises an auxiliary wiring platform, a two-stage current transformer, a current rising device, full-automatic wiring equipment, a control unit and a tested current transformer, wherein the control unit is connected with the auxiliary wiring platform, the two-stage current transformer, the current rising device, the full-automatic wiring equipment and the tested current transformer; the full-automatic wiring equipment automatically wires the current transformer to be tested, the two-stage current transformer and the current booster; the technical effects of improving the working efficiency and reducing the uncertainty of the measuring process are achieved.
Description
Technical Field
The invention relates to the field of power transmission, in particular to a full-automatic wiring device of a program control type current transformer.
Background
According to the regulation of the JJG313-2010 Current Transformer for measurement verification regulations: the class 0.05 to 0.01 current transformer used as the standard must be certified for one cycle of two years, and every change must be certified. The current transformer used as a standard instrument has the transformation ratio range of 5-2000/5 and 1A, the accuracy grade is 0.05-0.01, the transformation ratio range is wide, the grade requirements are different, the condition of wrong line connection can occur in actual detection, and the working efficiency is low; moreover, in the process of calibrating the same standard device at different transformation ratios, because the wiring operators are not always the same every time, the wiring contact at different transformation ratios is not always good, the uncertainty of the deterioration of the same tested transformer is increased, and the qualified transformer can be considered as unqualified.
Disclosure of Invention
The invention provides a full-automatic wiring device for a program-controlled current transformer, solves the technical problems of low wiring efficiency and high error probability in the prior art, and achieves the technical effects of high efficiency and high accuracy when the device in the application is used for realizing automatic wiring.
The problem that in the field, due to the fact that the transformation ratio range of a standard device is wide and the grade requirements are different, wrong line connection can occur in actual detection, and working efficiency is low is solved; and because of the operator is not necessarily the same at every turn of working a telephone switchboard in the different transformation ratio verification process to same platform of etalon, different transformation ratio wiring contact is not necessarily good, can lead to the same uncertain increase of examining the transformer variation, probably lead to qualified transformer to regard as unqualified scheduling problem, this application provides a programme-controlled type current transformer full-automatic termination, can improve work efficiency, reduces the uncertainty of measurement process.
The purpose of the invention is realized by the following technical scheme:
a full-automatic wiring device of a program-controlled current transformer comprises an auxiliary wiring platform, a two-stage standard current transformer, a current booster and a control unit, wherein the auxiliary wiring platform is connected with a tested current transformer and is used for full-automatic wiring of the tested current transformer, the standard two-stage current transformer and the current booster; the two-stage current transformer is connected with the primary side of the current transformer to be tested in series, and signals of the secondary sides of the two current transformers are compared; the current booster provides a large current of 0-6000A; the control unit is used for controlling the on-off of the relay.
Further, the auxiliary wiring platform comprises a primary wiring part and a secondary wiring part, wherein the primary wiring part is used for connecting the large-current conducting copper bars La, Lb1, Lb2, Lb4, L1, L2 and L3 … … L10 of the full-automatic wiring equipment to the terminals La, Lb1, Lb2, Lb4, L1, L2 and L3 … … L10 of the primary wiring panel of the auxiliary wiring platform through large-current wires so as to be conveniently connected with external primary side wiring terminals of the current transformer to be tested. The secondary wiring part connects normally open contacts K1, K2, K3 … … K16 of a plurality of relays in the relay control panel to auxiliary junction box secondary wiring panel wiring terminals K1, K2 and K3 … … K16, and external secondary side wiring terminals of the detected current transformer are conveniently connected.
Furthermore, the current ratio of the two-stage current transformer is 5-5000A/5A and 5A/1A, and the accurate level is 0.002 level. The two-stage current transformer is used as a standard device for comparison with a current transformer to be detected with the same current ratio, and the precision of the two-stage current transformer is 2 accuracy levels higher than that of the current transformer to be detected.
Further, the current booster outputs 0-6000A of large current to be supplied to the two-stage current transformer and the primary side of the current transformer to be detected, so that a primary loop is formed when the current transformer is detected;
further, the control unit is used for controlling the opening and closing of all the relays and the contactors.
Further, the device still includes the temperature appearance of patrolling and examining, and the temperature of patrolling and examining the appearance and carrying out real-time supervision to heavy current conductor and contact point, gathers the temperature of 16 temperature control points through thermal resistance sensor, and 16 passageway temperature values are transmitted for the host computer by the RS232 communication through the temperature appearance of patrolling and examining, implement temperature monitoring and control.
Furthermore, the relay state monitoring system tracks and monitors the opening and closing state of the relay for executing the transformation ratio switching, collects the switching value of the relay with corresponding action in time, displays the corresponding state and gives an alarm for prompting wrong action.
Furthermore, the humiture environment monitoring system monitors the humiture of the environment where the device is located, and the real-time collection device of humiture sensor is used for transmitting the local environment humiture at the present time to the host computer through RS232 communication.
Full-automatic wiring equipment carries out automatic wiring to current transformer, doublestage current transformer and the current rising ware examined, specifically is:
the full-automatic wiring equipment comprises primary and secondary automatic wiring of the double-stage current transformer and primary and secondary automatic wiring of the detected current transformer. The primary side wiring terminals Lb, L2 and L3 … … L8 of the two-stage current transformer are connected with different conductive copper bars Lb, L2 and L3 … … L8 through large current wires, the conductive copper bars Lb, L2 and L3 … … L8 are connected with a relay normally-open contact 1, the relay normally-open contact 2 is connected with the common conductive copper bar COM end of the two-stage current transformer, and similarly, the primary side wiring of the current transformer to be detected is connected with the primary side wiring method of the two-stage current transformer, the primary sides Lb, Lb1, Lb2, Lb4, L2 and L3 … … L10 are connected with the relay normally-open contact 1, and the normally-open contact 2 is connected with the common conductive copper bar COM1 of the current transformer to. The primary side polarity ends La and L1 of the double-stage current transformer are connected with the primary side polarity ends La and L1 of the current transformer to be detected through large current leads, the common end COM and the common end COM1 are respectively connected with the output end of the current booster to form a primary loop, and the on-off of the relay is controlled to realize the automatic primary side wiring of the double-stage current transformer and the current transformer to be detected. The two-stage current transformer and the secondary side of the current transformer to be detected are automatically connected in the same secondary side connection method. The common end com of the secondary side of the two-stage current transformer is led out to a transformer calibrator T0 terminal, and the common end com1 of the secondary side of the tested current transformer is led out to a current load box Z terminal and is connected to a transformer calibrator Tx terminal through the other end of the current load box, so that automatic wiring of the secondary sides of the two-stage current transformer and the tested current transformer is realized.
Further, the device workflow is as follows:
1) the auxiliary terminal block primary side wiring panel terminals La, Lb, L1, L2 and L3 … … L10 are connected with the current transformer to be detected primary side terminals La, Lb, L1, L2 and L3 … … L10 through large current leads, and the auxiliary terminal block can not be led out if the current transformer to be detected does not have the terminals on the primary side. Connecting secondary side wiring panel terminals K1, K2 and K3 … … K16 of the auxiliary wiring table with secondary side terminals K1, K2 and K3 … … K16 of the current transformer to be detected through secondary test lines, wherein the auxiliary wiring table can not be led out due to the terminals which are not arranged on the secondary side of the current transformer to be detected;
2) the device inputs the related parameters of the current transformer to be detected;
3) the device automatically judges the opening and closing of all relays according to the transformation ratio;
the invention adopts a nameplate copying and bar code management mode to collect and manage the specification parameters and wiring information of the current transformer to be detected, supports uniform asset filing, error data query, storage, historical data comparison and operation state evaluation of the current transformer to be detected. The device is used for detecting a current transformer with the current ratio of 5-5000A/5A and 1A and the accuracy grade of 0.05-0.01. In the checking process, all current ratios of the double-stage current transformer are automatically switched, the primary wiring and the secondary wiring of the current transformer to be checked are completed at one time, all current ratios are automatically switched, and the checking is automatically completed in sequence. The primary and secondary extension wiring of the current transformer with any current ratio is supported, and the wiring can be performed correspondingly as long as the current ratio of the standard device is provided. When dividing worker's wiring, need not to correspond the data plate, check the transformation ratio, only need with primary wiring end and secondary wiring end correspond the wiring panel of termination can, the device is automatic according to the data plate information automatic switch-over binding post of type-in, and whole journey is accomplished by host computer control termination, reduces and connects the mistake rate, improves efficiency of software testing. The automatic wiring part at the primary side of the two-stage current transformer and the current transformer to be detected in the full-automatic wiring equipment is connected to the conductive copper bars of the corresponding marks through a large-current lead by a primary side wiring terminal of the transformer, different conductive copper bars are connected with the normally open contact of the WJ32E-12 type high-power outlet type magnetic latching relay, and the common end of the relay is connected with the common conductive copper bars COM and COM1 at the non-polar end at the primary side of the transformer. The WJ32E-12 type high-power outlet type magnetic latching relay adopted by the automatic wiring part of the two-stage current transformer and the primary side of the current transformer to be detected in the full-automatic wiring equipment has the advantages of small contact impedance, stable resistance value, strong consistency, pulse control and strong anti-interference capability, avoids false operation in testing and enhances the working stability. The conductive copper bar connected with the primary side wiring terminal of the mutual inductor and the normally open contact of the relay in the full-automatic wiring equipment adopts a high-quality tinned copper bar, the passing current is large, the impedance is small, the geometric dimension of the copper material greatly avoids the current skin effect, and the eddy current loss is reduced. The conductive copper bar in the full-automatic wiring equipment is fixed by adopting a phenolic resin insulating material, other metal materials are insulated, the insulating strength is high, and the physical properties of the materials can reduce the vibration and noise in the upflow. Adopt high-quality rubber and soundproof cotton between the metal structure spare of supplementary terminal table and the full-automatic wiring equipment, can effectively cushion the rigid connection of metal structure spare and copper bar, reducible and absorption vibration and noise. And in the verification, the primary wiring information, the secondary wiring information and the current ratio of the standard device and the current transformer to be detected are displayed in real time, and meanwhile, the alarm is given to wrong wiring such as polarity reversal, wrong transformation ratio, out-of-limit and the like. The problem that the line connection is wrong in actual detection due to the fact that the standard device is wide in transformation ratio range and different in grade requirement on the site is solved, and working efficiency is low; in addition, in the process of calibrating the same standard device at different transformation ratios, because the wiring operators are not always the same every time, the wiring contact at different transformation ratios is not always good, the uncertainty of the deterioration of the detected mutual inductor of the same standard device is increased, and the qualified mutual inductor is possibly regarded as unqualified. The working efficiency is improved, and the uncertainty of the measuring process is reduced.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
when the current transformer is verified, only the primary wiring terminal and the secondary wiring terminal are correspondingly connected to the wiring panel of the auxiliary wiring board; the whole process of the transformation ratio switching and the automatic control is completed by an upper computer and a control wiring device; the problem that the line connection is wrong in actual detection due to the fact that the standard device is wide in transformation ratio range and different in grade requirement on the site is solved, and working efficiency is low; in addition, in the process of calibrating different transformation ratios of the same standard device, because the operators are not always the same in each connection, the connection wires with different transformation ratios are not always in good contact, the problem that the uncertainty of the same tested transformer is increased, and the qualified transformer is possibly regarded as unqualified is solved, so that the technical effects of improving the working efficiency and reducing the uncertainty in the measuring process are realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
fig. 1 is a block diagram of a full-automatic wiring device of a program-controlled current transformer according to an embodiment of the present invention;
fig. 2 is a testing schematic diagram of the full-automatic wiring device of the program-controlled current transformer according to the embodiment of the invention;
fig. 3 is a primary wiring diagram of the full-automatic wiring device of the programmed current transformer according to the embodiment of the invention.
Detailed Description
The invention provides a full-automatic wiring device for a program-controlled current transformer, solves the technical problems of low wiring efficiency and high error probability in the prior art, and achieves the technical effects of high efficiency and high accuracy when the device in the application is used for realizing automatic wiring.
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The application provides a full-automatic termination of programme-controlled formula current transformer, the device includes:
the system comprises an auxiliary wiring platform, a two-stage standard current transformer, a current booster, full-automatic wiring equipment, a control unit and a tested current transformer, wherein the control unit is connected with the auxiliary wiring platform, the two-stage standard current transformer, the current booster, the full-automatic wiring equipment and the tested current transformer; the full-automatic wiring equipment automatically connects the tested current transformer, the standard two-stage current transformer and the current booster; the primary side of the two-stage current transformer is connected with the primary side of the tested current transformer in series, and the control unit compares signals of the secondary side of the two-stage current transformer with signals of the secondary side of the tested current transformer; the current booster is used for providing current; the control unit is used for controlling the on-off of a relay, the on-off state inspection of the relay, the temperature change inspection of a current conductor and a contact point and the temperature and humidity monitoring of the environment where the device is located.
The auxiliary wiring platform comprises a primary wiring part and a secondary wiring part, wherein the primary wiring part fixes the primary side of the tested current transformer and the primary side of the two-stage standard current transformer on different conductive copper bars respectively through wires, and the secondary side of the tested current transformer and the secondary side of the two-stage standard current transformer of the secondary wiring part are connected to corresponding wiring posts on the surface of the device.
As shown in fig. 1, 2 and 3, a program-controlled full-automatic wiring device for a current transformer comprises a two-stage standard current transformer 101 connected with a current transformer To be tested, a current booster 102, primary wiring parts 103 and 104 of the full-automatic wiring device, and secondary wiring parts 105 and 106, wherein the standard 101 is connected in series with the primary side of the current transformer To be tested, secondary side signals of the two are compared, the secondary side of the two-stage standard current transformer 101 is connected with the full-automatic wiring device To, the non-polar end of the current transformer To be tested is connected with the full-automatic wiring device Tx, the polar ends of the two are connected with the full-automatic wiring device K, B5 of the two-stage standard current transformer 101 is connected with the full-automatic wiring device D, and the opening and closing of the primary and secondary.
The primary sides and the secondary sides of the current transformer to be detected and the two-stage standard current transformer 101 are all connected to the corresponding binding posts of the full-automatic wiring device in sequence, namely primary wiring parts 103 and 104 and secondary wiring parts 105 and 106. The current booster 102 is respectively connected with a primary side 103 of the two-stage standard current transformer 101 and a primary side 104 of the current transformer to be detected, and the control system judges that the current booster penetrates through several turns according to the transformation ratio of the current transformer to be detected so as to control the opening and closing of the relay.
The test method is as follows:
1) connecting the two-stage current transformer, the current booster, the primary side and the secondary side of the current transformer to be detected with the device;
2) the device inputs the related parameters of the current transformer to be detected;
3) the device automatically judges the opening and closing of all relays according to the transformation ratio;
the invention adopts a nameplate copying and bar code management mode to collect and manage the specification parameters and wiring information of the current transformer to be detected, supports uniform asset filing, error data query, storage, historical data comparison and operation state evaluation of the current transformer to be detected. The device is used for detecting a current transformer with the current ratio of 5-5000A/5A and 1A and the precision of 0.05-0.01 level. In the checking process, the primary wiring and the secondary wiring of each current ratio of the standard current transformer and the current transformer to be checked are finished at one time, and the checking is automatically finished in sequence of each current ratio. The primary and secondary extension wiring of the current transformer with any current ratio is supported, and the wiring can be performed correspondingly as long as the current ratio of the standard device is provided. When dividing worker's wiring, need not to correspond the data plate, check the transformation ratio, only need with primary wiring end and secondary wiring end correspond the wiring panel of termination can, the device is automatic according to the data plate information automatic switch-over binding post of type-in, and whole journey is accomplished by host computer control termination, reduces and connects the mistake rate, improves efficiency of software testing. The primary switching module and the secondary switching module of the device both adopt high-power outlet type magnetic latching relays, the contact impedance is small, the resistance value is stable, the consistency is strong, pulse control is adopted, the anti-interference capability is strong, the false operation in the test is avoided, and the working stability is enhanced. The high-quality tinned copper plate is adopted, the current passing is large, the impedance is small, the current skin effect is greatly avoided due to the geometric size of the copper material, and the eddy current loss is reduced. The phenolic resin insulating material is adopted, so that the insulating strength is high, and the physical properties of the material can reduce vibration and noise in upflow. High-quality rubber and soundproof cotton are adopted to effectively buffer the hard connection between the metal part and the copper plate, so that the vibration and the noise can be reduced and absorbed. And in the verification, the primary wiring information, the secondary wiring information and the current ratio of the standard device and the current transformer to be detected are displayed in real time, and meanwhile, the alarm is given to wrong wiring such as polarity reversal, wrong transformation ratio, out-of-limit and the like. The problem that the line connection is wrong in actual detection due to the fact that the standard device is wide in transformation ratio range and different in grade requirement on the site is solved, and working efficiency is low; in addition, in the process of calibrating the same standard device at different transformation ratios, because the wiring operators are not always the same every time, the wiring contact at different transformation ratios is not always good, the uncertainty of the deterioration of the detected mutual inductor of the same standard device is increased, and the qualified mutual inductor is possibly regarded as unqualified. The working efficiency is improved, and the uncertainty of the measuring process is reduced.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
when the current transformer is verified, only the primary wiring terminal and the secondary wiring terminal are correspondingly connected to the wiring panel of the auxiliary wiring board; the whole process of the transformation ratio switching and the automatic control is completed by an upper computer and a control wiring device; the problem that the line connection is wrong in actual detection due to the fact that the standard device is wide in transformation ratio range and different in grade requirement on the site is solved, and working efficiency is low; in addition, in the process of calibrating different transformation ratios of the same standard device, because the operators are not always the same in each connection, the connection wires with different transformation ratios are not always in good contact, the problem that the uncertainty of the same tested transformer is increased, and the qualified transformer is possibly regarded as unqualified is solved, so that the technical effects of improving the working efficiency and reducing the uncertainty in the measuring process are realized.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The utility model provides a full-automatic termination of programmed type current transformer which characterized in that, the device includes:
the system comprises an auxiliary wiring platform, a standard two-stage current transformer, a current booster, full-automatic wiring equipment, a control unit and a tested current transformer, wherein the control unit is connected with the auxiliary wiring platform, the standard two-stage current transformer, the current booster, the full-automatic wiring equipment and the tested current transformer; the full-automatic wiring equipment automatically connects the tested current transformer, the standard two-stage current transformer and the current booster; the primary side of the standard two-stage current transformer is connected with the primary side of the tested current transformer in series, and the control unit compares signals of the secondary side of the standard two-stage current transformer with signals of the secondary side of the tested current transformer; the current booster is used for providing current; the control unit is used for controlling the on-off of a relay, the on-off state inspection of the relay, the temperature change inspection of a current conductor and a contact point and the temperature and humidity monitoring of the environment where the device is located;
full-automatic wiring equipment carries out automatic wiring to being surveyed current transformer, standard doublestage current transformer and current rising ware, specifically is:
the automatic wiring includes: the primary and secondary automatic wiring of the standard two-stage current transformer and the primary and secondary automatic wiring of the current transformer to be detected are carried out; the primary side connecting terminals Lb, L2 and L3 … … L8 of the standard double-stage current transformer are respectively connected with conductive copper bars Lb, L2 and L3 … … L8 through leads, the conductive copper bars Lb, L2 and L3 … … L8 are connected with a normally open contact 1 of a relay, the normally open contact 2 of the relay is connected with the common conductive copper bar COM end of the standard double-stage current transformer, the primary sides Lb, Lb1, Lb2 and Lb4 of the detected current transformer, L2 and L3 … … L10 are connected with the normally open contact 1 of the relay, and the normally open contact 2 is connected with the common conductive copper bar COM1 of the detected current transformer; primary side polarity ends La and L1 of the standard two-stage current transformer are connected with primary side polarity ends La and L1 of the current transformer to be detected through conducting wires, a common end COM and a common end COM1 are respectively connected with the output end of the current booster to form a primary loop, and the on-off of the relay is controlled to realize the automatic primary side wiring of the standard two-stage current transformer and the current transformer to be detected; the secondary side automatic wiring method of the standard two-stage current transformer and the current transformer to be tested is the same as the primary side wiring method; the common terminal com of the secondary side of the standard double-stage current transformer is led out to a transformer calibrator T0 terminal, and the common terminal com1 of the secondary side of the tested current transformer is led out to a current load box Z terminal and is connected to a transformer calibrator Tx terminal through the other end of the current load box, so that automatic wiring of the secondary sides of the standard double-stage current transformer and the tested current transformer is realized.
2. The full-automatic wiring device of the programmed current transformer according to claim 1, wherein the auxiliary wiring platform comprises: the primary wiring part fixes the primary side of the tested current transformer and the primary side of the standard two-stage current transformer on different conductive copper bars respectively through wires, and the secondary wiring part connects the secondary side of the tested current transformer and the secondary side of the standard two-stage current transformer to corresponding binding posts on the surface of the device.
3. The full-automatic wiring device of the programmed current transformer according to claim 1, wherein the transformation ratio of the standard two-stage current transformer is 5-5000A/5A and 5A/1A, and the accuracy grade is 0.002 grade.
4. The fully automatic wiring device of claim 1, wherein the current booster outputs 0 to 6000A current to supply the primary side of a standard two-stage current transformer.
5. The full-automatic wiring device of the program-controlled current transformer according to claim 1, wherein the control unit is used for monitoring the temperature of the current conductor and the contact points in real time, collecting the temperature of 16 temperature control points through the thermal resistance sensor, transmitting the 16-channel temperature value to the upper computer through RS232 communication by the temperature patrol instrument, and monitoring and controlling the temperature.
6. The full-automatic wiring device of the program-controlled current transformer according to claim 1, wherein the control unit is used for tracking and monitoring the opening and closing state of the relay performing the transformation ratio switching, collecting the switching value of the relay in corresponding action in time, displaying the corresponding state, and giving an alarm for a wrong action.
7. The full-automatic wiring device of the program-controlled current transformer according to claim 1, wherein the control unit is used for monitoring the temperature and humidity of the environment where the device is located, collecting the temperature and humidity of the environment at the current time and the local place in real time through a temperature and humidity sensor and transmitting the temperature and humidity of the environment to the upper computer through RS232 communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432187.6A CN107271944B (en) | 2017-06-09 | 2017-06-09 | Full-automatic wiring device of program-controlled current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432187.6A CN107271944B (en) | 2017-06-09 | 2017-06-09 | Full-automatic wiring device of program-controlled current transformer |
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| CN107271944A CN107271944A (en) | 2017-10-20 |
| CN107271944B true CN107271944B (en) | 2020-06-23 |
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| CN111487576B (en) * | 2020-04-30 | 2022-12-30 | 浙江省计量科学研究院 | Miniature current transformer measuring device based on direct measurement method |
| CN112731258A (en) * | 2021-01-13 | 2021-04-30 | 国网新疆电力有限公司营销服务中心(资金集约中心、计量中心) | Auxiliary wiring device of current transformer |
| CN113702892B (en) * | 2021-08-27 | 2024-06-14 | 国网江苏省电力有限公司营销服务中心 | Continuous electronic current transformer vibration test device and use method thereof |
| CN114823088B (en) * | 2022-06-23 | 2022-09-23 | 国网湖北省电力有限公司营销服务中心(计量中心) | Standard transformer and using method thereof |
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| CN107271944A (en) | 2017-10-20 |
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