CN116169780A - Secondary side intelligent short circuit of current transformer and working method thereof - Google Patents
Secondary side intelligent short circuit of current transformer and working method thereof Download PDFInfo
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- CN116169780A CN116169780A CN202211623318.6A CN202211623318A CN116169780A CN 116169780 A CN116169780 A CN 116169780A CN 202211623318 A CN202211623318 A CN 202211623318A CN 116169780 A CN116169780 A CN 116169780A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides an intelligent short circuit on the secondary side of a current transformer and a working method thereof, and relates to the technical field of electric safety of power equipment. The utility model provides a current transformer secondary side intelligent short circuit, includes intelligent short circuit module, intelligent short circuit module connects intelligent switch module, and intelligent switch module still connects intelligent discharge module. The working method applied to the circuit can automatically indicate the short circuit state when the secondary side of the current transformer is short-circuited; and when the secondary side of the current transformer is discharged, intelligently detecting and indicating whether the discharge voltage meets the safety standard. Compared with the traditional mode that a common single wire is required to be used for manual operation, and then safety accidents are easy to cause, the intelligent short circuit and the working method thereof can automatically detect and indicate the abnormal state of short circuit and the problem of over-range discharge voltage in real time, so that the safety of an operation site is effectively improved, and the intelligent short circuit has wide application prospect in the secondary side short circuit and discharge operation of a current transformer.
Description
Technical Field
The invention relates to the technical field of electric safety of power equipment, in particular to an intelligent short circuit on the secondary side of a current transformer and a working method thereof.
Background
In order to ensure the safe, stable and economic operation of the power grid and the power utilization system, the relevant standards, regulations, specifications and anti-accident measures of the national and industry levels have clear requirements on the power failure overhaul period, project and method of primary and secondary power equipment in the transformer substation. Specifically, according to the requirements, in the process of overhauling and testing the power equipment, the reliable short circuit of the secondary winding of the current transformer is ensured, and safe discharge treatment is carried out after the overhauling and testing is finished. That is, the secondary winding of the current transformer is not allowed to open, otherwise high voltage is generated, and safety of operators and equipment is endangered; meanwhile, the iron core of the current transformer is overheated due to high voltage, so that the transformer is possibly burnt out; in addition, when the secondary winding of the current transformer is opened, the conditions that the secondary current and the secondary magnetomotive force are zero and the primary magnetomotive force is all used for excitation can occur, so that the excitation magnetomotive force is suddenly increased to cause the magnetic flux saturation of the iron core of the transformer, and finally, the secondary winding generates the peak wave electromotive force when the magnetic flux is zero crossing, and the safety of operators and equipment can be threatened.
However, the prior art does not have intelligent means dedicated to secondary side shorting and discharging of current transformers. Therefore, in the actual overhaul and test process of the power equipment, operators manually short-circuit two ends of the secondary winding of the current transformer by using a common single wire; after the maintenance and test are finished, the common single lead is used for manual discharge treatment. In the process, the conditions of broken short wire, wrong short circuit position, unstable short circuit, incomplete discharge and the like inevitably occur, so that high voltage is generated in the secondary winding of the current transformer; and when the short circuit state or the discharge safety is in a problem, operators cannot perceive in advance and take avoidance measures. Based on the above, in recent years, when the electric power equipment is subjected to routine maintenance and test, the events of unstable short circuit and incomplete discharge of the secondary side of the current transformer are frequent; the high voltage which is further generated may damage the equipment and may cause an electric shock accident to personnel.
In conclusion, the method has very research significance and practical significance if reliable short circuit and safe discharge on the secondary side of the current transformer can be realized.
Disclosure of Invention
The invention aims to provide a secondary side intelligent short circuit of a current transformer and a working method thereof, which are used for solving the problems that in the existing manual short circuit and discharge mode, the conditions of short circuit wire breakage, short circuit position error, infirm short circuit, incomplete discharge and the like are easy to occur, and operators cannot perceive in advance, so that high voltage is generated in a secondary winding of the current transformer, and the safety of the operators and equipment is endangered.
The invention is realized by adopting the following technical scheme:
the utility model provides a current transformer secondary side intelligent short circuit, includes intelligent short circuit module, intelligent short circuit module connects intelligent switch module, and intelligent switch module still connects intelligent discharge module.
According to the scheme, the intelligent short circuit module can carry out short circuit operation on the secondary side of the current transformer, and whether real-time short circuit wiring is normal or not can be automatically judged and indicated after the short circuit is formed; the intelligent switch module can close the short circuit inside short circuit wire and automatically judge and indicate the real-time closing state of the switch; therefore, reliability judgment and real-time indication of the secondary side short circuit state of the current transformer can be intelligently realized. Through the intelligent discharging module, a secondary side discharging loop of the current transformer is formed, and whether the discharging voltage accords with an operation standard or not can be automatically detected and indicated in real time, so that the safety of operators in the process of wire unwinding is ensured. In summary, the intelligent short circuit can realize whole-course supervision of short circuit and discharge operation of the secondary side of the current transformer, can indicate the abnormal state of short circuit and the problem of over-range discharge voltage in real time, and further effectively avoids the occurrence of high-voltage condition of the secondary winding of the current transformer caused by various factors, thereby ensuring the safety of operators and equipment.
Further, the intelligent short circuit comprises a first short circuit wire and a second short circuit wire; one end of the first shorting link is correspondingly connected with a secondary side live wire end of the current transformer, and the other end of the first shorting link is correspondingly connected with the intelligent switch module; one end of the second shorting stub is connected with the secondary side zero line end of the current transformer, and the other end of the second shorting stub is also connected with the intelligent switch module; the first shorting wire and the second shorting wire are used for shorting the secondary side of the current transformer.
Further, one end of the short-circuit self-checking branch is correspondingly connected to the first shorting wire, and the other end of the short-circuit self-checking branch is connected to the positive electrode of the battery; the second shorting stub is connected with the negative electrode of the battery through a lead; the short circuit self-checking branch circuit is used for judging and indicating whether the secondary side short circuit wiring of the current transformer is normal or not.
Furthermore, the short circuit self-checking branch is provided with an LED, a resistor and a diode which are sequentially connected in series from one end to the other end. Specifically, when the short-circuit wiring is normal, the LED light-emitting diode can be lightened; conversely, when the short circuit is miswired, disconnected or unreliable, the LED light emitting diode is not lit.
Further, the intelligent switch module comprises a disconnecting switch, one end of the disconnecting switch is correspondingly connected with the other ends of the first shorting stub and the second shorting stub, the other end of the disconnecting switch is connected with one end of a switch self-checking branch, and the other end of the switch self-checking branch is connected with the anode of the battery; the isolating switch is used for closing the short circuit internal short circuit wire, and the switch self-checking branch is used for judging and indicating the internal short circuit connection condition (also can be understood as a switch closing state).
Furthermore, the switch self-checking branch is provided with an LED, a resistor and a diode which are sequentially connected in series from one end to the other end. Specifically, after the isolating switch is stably closed, the internal short circuit loop successfully realizes short circuit, and the LED can be lightened; otherwise, if the disconnecting switch is not reliably closed or the internal short circuit loop is abnormally connected, the LED is not lightened.
Further, the other end of the isolating switch is also connected with an alternating current input end of a rectification chip in the intelligent discharging module, a negative electrode of a direct current output end of the rectification chip is connected with one end of a discharging indication branch, and a positive electrode of the direct current output end of the rectification chip is connected with the other end of the discharging indication branch; the rectification chip is used for rectifying the alternating voltage to be discharged into direct voltage, the rectification chip, the discharge indication branch circuit and a complete discharge loop are formed, and the discharge indication branch circuit is used for automatically detecting and indicating whether the discharge voltage meets the safety operation standard.
Further, the discharge indication branch is provided with an LED, a resistor and a diode which are sequentially connected in series from one end to the other end. Specifically, when the discharge voltage is higher than a specified value (typically 24 v), the LED light emitting diode will be lit; on the contrary, when the discharge voltage is lower than the specified value, the LED is not lightened, and the operator can perform the wire-releasing treatment at the moment.
The working method of the intelligent short circuit on the secondary side of the current transformer is applied to the intelligent short circuit: when the secondary side of the current transformer is short-circuited, the short-circuited state is automatically indicated; and when the secondary side of the current transformer is discharged, intelligently detecting and indicating whether the discharge voltage meets the safety standard.
According to the technical scheme, by the application of the working method, operators on the power equipment overhaul and test site can receive the short-circuit state information and the discharge safety information of the secondary side of the current transformer in real time, and countermeasures can be timely taken when abnormal conditions occur, so that intelligent short-circuit and safe discharge of the secondary side of the current transformer are realized, and a brand new solution is provided for the safety problem existing in the traditional operation means.
Further, before shorting the current transformer secondary side, the intelligent shorting module and the intelligent switch module perform self-checking first. Specifically, self-checking is performed on a short-circuit self-checking branch and a switch self-checking branch, and the purpose of self-checking is to ensure that the two self-checking branches can work normally so as to avoid influencing judgment and indication of a short-circuit state.
The beneficial effects achieved by the invention are as follows:
the intelligent short circuit of the secondary side of the current transformer can intelligently judge and indicate the reliability of the short circuit state of the secondary side of the current transformer in real time through the intelligent discharging module and the intelligent switching module, and can automatically detect and indicate whether the discharging voltage accords with the safety operation standard in real time through the intelligent discharging module; the working method of the intelligent short circuit on the secondary side of the current transformer can carry out whole-course supervision on the short circuit and the discharge process of the secondary side of the current transformer in practical application, so as to realize intelligent short circuit and safe discharge, and can ensure the effective realization of supervision effect through self-checking.
Compared with the traditional mode that a common single wire is required to be used for manual operation, so that safety accidents are easy to cause, the intelligent short circuit and the working method thereof can automatically detect and indicate the abnormal state of the short circuit and the problem of over-range discharge voltage in real time, so that the safety of an operation site is effectively improved, the common accidents can be objectively reduced, the serious accidents are avoided, the intrinsic safety level of overhaul and test engineering in a transformer substation is practically improved, and considerable safety benefit, social benefit and economic benefit are brought to a power grid and a power utilization system; and the structure and the operation are simple, the practicability is high, and the device has wide application prospect in secondary side short circuit and discharge operation of the current transformer.
Drawings
FIG. 1 is a schematic block diagram of an intelligent short circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall circuit configuration of the intelligent short circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an intelligent short circuit module in the intelligent short circuit according to an embodiment of the invention;
fig. 4 is a schematic circuit diagram of an intelligent switch module in the intelligent short circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an intelligent discharging module in the intelligent short circuit according to the embodiment of the invention;
fig. 6 is a schematic flow chart of an operation method of the intelligent short circuit according to the embodiment of the invention.
Detailed Description
For clarity of explanation of the solution of the present invention, the following will be further explained with reference to the accompanying drawings:
example 1
Please refer to fig. 1 to 5, a secondary side intelligent short circuit of a current transformer is applied to the short circuit of the secondary side of a three-phase current transformer, which comprises an intelligent short circuit module, wherein the intelligent short circuit module is connected with an intelligent switch module, and the intelligent switch module is also connected with an intelligent discharge module, wherein:
the intelligent short circuit module comprises three-phase short circuits consisting of 3 short circuits I and 1 short circuit II, and GK1, GK2, GK3 and GK4 ends of the three-phase short circuits are respectively and correspondingly connected with A, B, C, N ends of the secondary side of the three-phase current transformer; the GK1, GK2 and GK3 ends of the three-phase short-circuit wire are correspondingly connected with one end of the first short-circuit self-checking branch, one end of the second short-circuit self-checking branch and one end of the third short-circuit self-checking branch respectively, and the other ends of the first short-circuit self-checking branch, the second short-circuit self-checking branch and the third short-circuit self-checking branch are connected with the anode of the battery; the first short circuit self-checking branch is provided with a light emitting diode LED1, a 10k resistor R1 and a diode D1 which are sequentially connected in series from one end to the other end, the second short circuit self-checking branch is provided with a light emitting diode LED2, a 10k resistor R2 and a diode D2 which are sequentially connected in series from one end to the other end, and the third short circuit self-checking branch is provided with a light emitting diode LED3, a 10k resistor R3 and a diode D3 which are sequentially connected in series from one end to the other end; and the GK4 end of the three-phase shorting bar is also connected with the negative electrode of the battery through a lead.
The intelligent switch module comprises a 4P isolating switch QS1, and 4 switch contacts at the upper end of the isolating switch QS1 are correspondingly connected with GK5, GK6, GK7 and GK8 ends of the three-phase shorting bar respectively; the HP end of the isolating switch QS1 is connected with one end of the switch self-checking branch, and the other end of the switch self-checking branch is connected with the anode of the battery; the switch self-checking branch is provided with a light emitting diode LED4, a 10k resistor R4 and a diode D4 which are sequentially connected in series from one end to the other end.
The intelligent discharging module comprises a rectifying chip B1, wherein an end a of the rectifying chip B1 is connected to an HP end of the isolating switch QS1, an end B is grounded through a grounding wire, an end c is connected with one end of a discharging indication branch, and an end d is connected with the other end of the discharging indication branch; the discharge indication branch is provided with a light emitting diode LED5, a 10k resistor R5 and a diode D5 which are sequentially connected in series from one end to the other end.
The working principle of this embodiment is as follows:
through intelligent short circuit module, carry out the short circuit operation to current transformer secondary to whether the real-time short circuit wiring is normal is instructed automatically. Specifically, the three-phase short-circuit wire is used for shorting the secondary side of the three-phase current transformer, and the short-circuit self-checking branch is used for judging and indicating whether the short-circuit wire of the secondary side of the three-phase current transformer is normal: when one, a plurality or all of GK1, GK2, GK3 and GK4 ends of the three-phase shorting stub are correspondingly and reliably connected to A, B, C, N ends of the secondary side of the three-phase current transformer, the corresponding LED light-emitting diode can be lightened; conversely, when some or all of the short circuits are wrongly wired, disconnected or unreliable, the corresponding LED is not lighted.
Through intelligent switch module, close the inside shorting stub of short circuit to the real-time closed state of automatic indication isolator QS1. Specifically, isolator is used for closing the inside shorting stub of short circuit, and switch self-checking branch road is used for judging and instructs inside short circuit return circuit connection condition: when the isolating switch QS1 is stably closed, the internal loop is short-circuited, and the light emitting diode LED4 is lightened; when the closing of the disconnector QS1 is not stable or the internal short circuit connection is not reliable, the light emitting diode LED4 is not illuminated.
And an intelligent discharging module is used for forming a secondary side discharging loop of the current transformer and automatically detecting and indicating whether the discharging voltage meets the operation standard or not in real time. Specifically, the rectification chip B1 is configured to rectify an ac voltage to be discharged into a dc voltage, and the rectification chip B1 and the discharge indication branch form a complete discharge loop, where the discharge indication branch is configured to automatically detect and indicate whether the discharge voltage meets a safety operation standard: when the secondary side of the three-phase current transformer has a floating voltage, discharging through the discharging loop; further judging the discharge effect, and when the discharge voltage is higher than 24v, the Light Emitting Diode (LED) 5 is lightened; conversely, when the discharge voltage is lower than 24v, the light emitting diode LED5 is not lighted, which represents that the operator can perform the wire unwinding process at this time.
Therefore, the method and the device can realize whole-course supervision of short circuit and discharge operation of the secondary side of the three-phase current transformer, can indicate the abnormal state of the short circuit and the problem of over-range discharge voltage in real time, and further effectively avoid the occurrence of high-voltage conditions of the secondary winding of the current transformer caused by various factors, thereby ensuring the safety of operators and equipment.
Example 2
Referring to fig. 1 to 6, a working method of an intelligent short circuit on a secondary side of a current transformer is applied to the intelligent short circuit described in embodiment 1: when the secondary side of the three-phase current transformer is short-circuited, the short-circuit state is automatically indicated; and when the secondary side of the three-phase current transformer is discharged, intelligently detecting and indicating whether the discharge voltage meets the safety standard. And before shorting the current transformer secondary side, intelligent short circuit module and intelligent switch module carry out the self-checking earlier. The method specifically comprises the following steps:
sa: and (5) self-checking.
Sa1: the intelligent short circuit module executes self-checking;
sa1-1: the end A and the end N of the three-phase current transformer are short-circuited through the intelligent short-circuit module, a light-emitting diode (LED) 1, a resistor R1 and a diode D1 in the short-circuit self-checking branch are in a complete loop with a battery, and if the light-emitting diode (LED) 1 is bright, the short-circuit self-checking branch corresponding to the secondary side of the phase A current transformer is normal;
sa1-2: the end B and the end N of the three-phase current transformer are short-circuited through the intelligent short-circuit module, a light-emitting diode (LED) 2, a resistor R2 and a diode D2 in the short-circuit self-checking branch are in a complete loop with a battery, and if the light-emitting diode (LED) 2 is bright, the fact that the short-circuit self-checking branch corresponding to the secondary side of the B-phase current transformer is normal is represented;
sa1-3: the C end and the N end of the three-phase current transformer are short-circuited through the intelligent short-circuit module, a light-emitting diode (LED) 3, a resistor R3 and a diode D3 in the short-circuit self-checking branch are in a complete loop with a battery, and if the light-emitting diode (LED) 3 is bright, the short-circuit self-checking branch corresponding to the secondary side of the C-phase current transformer is normal;
sa2: the intelligent switch module executes self-checking;
closing a disconnecting switch QS1 in the intelligent switch module, forming a complete loop by the switch self-checking branch and the battery, and if the light emitting diode LED4 is on, representing that the switch self-checking branch is normal.
Sb: and intelligent short circuit is realized on the secondary side of the three-phase current transformer.
Sb1: shorting the secondary side of the three-phase current transformer;
sb1-1: shorting the secondary side of the three-phase current transformer: GK1, GK2, GK3 and GK4 ends of three-phase short-circuit wires in the intelligent short-circuit module are respectively and correspondingly connected to A, B, C, N ends of the secondary side of the three-phase current transformer;
sb1-2: closing a disconnecting switch QS1 in the intelligent switch module;
sb2: judging and indicating the reliability of the secondary side short circuit state of the current transformer in real time;
sb2-1: automatically judging and indicating whether the real-time short-circuit wiring is normal or not;
sb2-11: the intelligent short circuit module part corresponding to the A is used for shorting the self-checking branch I to form a finished loop with the battery, if the light-emitting diode LED1 is on, the short circuit wiring of the secondary side of the A-phase current transformer is normal, otherwise, the wiring is checked;
sb2-12: the intelligent short circuit module part corresponding to the B is used for shorting the self-checking branch II and the battery to form a finished loop, if the light-emitting diode (LED) 2 is on, the short circuit wiring of the secondary side of the B-phase current transformer is normal, otherwise, the wiring is checked;
sb2-13: the intelligent short circuit module part corresponding to the C is used for shorting the self-checking branch III and the battery to form a finished loop, if the light emitting diode LED3 is on, the short circuit wiring of the secondary side of the C-phase current transformer is normal, otherwise, the wiring is checked;
sb2-2: automatically judging and indicating the real-time closing state of the switch;
the switch self-checking branch and the battery form a complete loop, if the light emitting diode LED4 is on, the isolation switch QS1 is closed stably, otherwise, the isolation switch QS1 needs to be opened first and then closed again.
Sc: and intelligent discharge is realized on the secondary side of the three-phase current transformer.
Sc1: after the maintenance and test of the power equipment are finished, grounding d end of a rectification chip B1 in the intelligent discharging module, forming a complete discharging loop by the rectification chip B1, a discharging indication branch and the discharging indication branch, and discharging through the discharging loop when the secondary side of the three-phase current transformer has a floating voltage;
sc2: when the discharge voltage is higher than 24v, the light emitting diode LED5 will be lit; conversely, when the discharge voltage is lower than 24v, the light emitting diode LED5 is not lighted;
sc3: and (3) according to the indication result of the step Sc2, the operator performs wire-stripping treatment when the discharge voltage meets the safety standard until all the wires are removed.
Therefore, by applying the working method in the embodiment, operators on the power equipment overhaul and test site can receive the short-circuit state information and the discharge safety information of the secondary side of the three-phase current transformer in real time, and countermeasures can be timely taken when abnormal conditions occur, so that intelligent short-circuit and safe discharge of the secondary side of the three-phase current transformer are realized, and a brand new solution is provided for the safety problem existing in the traditional operation means.
Of course, the foregoing is merely preferred embodiments of the present invention and is not to be construed as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and those skilled in the art will appreciate that the present invention is capable of equally varying and improving within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a current transformer secondary side intelligent short circuit which characterized in that: including intelligent short circuit module, intelligent short circuit module connects intelligent switch module, and intelligent switch module still connects intelligent discharge module.
2. The secondary side intelligent short circuit of a current transformer according to claim 1, wherein: the intelligent short circuit comprises a first short circuit wire and a second short circuit wire; one end of the first shorting link is correspondingly connected with a secondary side live wire end of the current transformer, and the other end of the first shorting link is correspondingly connected with the intelligent switch module; one end of the second shorting stub is connected with the secondary side zero line end of the current transformer, and the other end of the second shorting stub is also connected with the intelligent switch module.
3. The secondary side intelligent short circuit of a current transformer according to claim 2, wherein: one end of the short-circuit self-checking branch is correspondingly connected to the first shorting wire, and the other end of the short-circuit self-checking branch is connected to the positive electrode of the battery; and the second shorting bar is connected with the negative electrode of the battery through a lead.
4. A secondary side intelligent short circuit for a current transformer as claimed in claim 3, wherein: and the short circuit self-checking branch is provided with an LED, a resistor and a diode which are sequentially connected in series from one end to the other end.
5. The secondary side intelligent short circuit of a current transformer according to claim 2, wherein: the intelligent switch module comprises a disconnecting switch, one end of the disconnecting switch is correspondingly connected with the other ends of the first shorting stub and the second shorting stub, the other end of the disconnecting switch is connected with one end of a switch self-checking branch, and the other end of the switch self-checking branch is connected with the anode of the battery.
6. The secondary side intelligent short circuit of a current transformer of claim 5, wherein: and the switch self-checking branch is provided with an LED, a resistor and a diode which are sequentially connected in series from one end to the other end.
7. The secondary side intelligent short circuit of a current transformer of claim 5, wherein: the other end of the isolating switch is also connected with the alternating current input end of the rectifying chip in the intelligent discharging module, the negative electrode of the direct current output end of the rectifying chip is connected with one end of the discharging indication branch, and the positive electrode of the direct current output end of the rectifying chip is connected with the other end of the discharging indication branch.
8. The secondary side intelligent short circuit of a current transformer of claim 7, wherein: and the discharge indication branch is provided with an LED, a resistor and a diode which are sequentially connected in series from one end to the other end.
9. The working method of the intelligent short circuit on the secondary side of the current transformer is applied to the intelligent short circuit of any one of claims 1 to 8, and is characterized in that: when the secondary side of the current transformer is short-circuited, the short-circuited state is automatically indicated; and when the secondary side of the current transformer is discharged, intelligently detecting and indicating whether the discharge voltage meets the safety standard.
10. The method for operating the secondary side intelligent short circuit of the current transformer according to claim 9, wherein the method comprises the following steps: before shorting the current transformer secondary side, intelligent short circuit module and intelligent switch module carry out the self-checking earlier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211623318.6A CN116169780A (en) | 2022-12-16 | 2022-12-16 | Secondary side intelligent short circuit of current transformer and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211623318.6A CN116169780A (en) | 2022-12-16 | 2022-12-16 | Secondary side intelligent short circuit of current transformer and working method thereof |
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| Publication Number | Publication Date |
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| CN116169780A true CN116169780A (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211623318.6A Pending CN116169780A (en) | 2022-12-16 | 2022-12-16 | Secondary side intelligent short circuit of current transformer and working method thereof |
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| CN (1) | CN116169780A (en) |
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- 2022-12-16 CN CN202211623318.6A patent/CN116169780A/en active Pending
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