CN115065035A - Breaker closing coil protection device - Google Patents
Breaker closing coil protection device Download PDFInfo
- Publication number
- CN115065035A CN115065035A CN202210645141.3A CN202210645141A CN115065035A CN 115065035 A CN115065035 A CN 115065035A CN 202210645141 A CN202210645141 A CN 202210645141A CN 115065035 A CN115065035 A CN 115065035A
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- Prior art keywords
- closing
- circuit breaker
- switching
- coil
- protection device
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- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/008—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for protective arrangements according to this subclass
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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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- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses a circuit breaker closing coil protection device, which comprises a closing loop, wherein the closing loop comprises: closing module, monitoring module and control module. When the circuit breaker receives the switching-on order after, whether the coil protection device can judge the circuit breaker switching-on according to the position of circuit breaker auxiliary contact succeeds, if the circuit breaker does not switch on successfully, protection device can automatic excision circuit breaker operating power supply, prevents that circuit breaker switching-on coil from long-time circular telegram and burning out. When the circuit breaker is not successfully switched on, the device sends an alarm signal to the public measurement and control cabinet, and after a dispatcher sees the alarm signal, the dispatcher orders an operation and maintenance worker to manually switch on the circuit breaker as soon as possible, so that the power supply loss load is reduced. The protection device can prevent the switching-on and switching-off coil from being burnt due to overlarge current or overlong current duration in the control loop, so that the possibility of equipment damage is reduced.
Description
Technical Field
The invention relates to the technical field of power control, in particular to a protection device for a closing coil of a circuit breaker.
Background
In recent years, with the wide application of microcomputer protection and comprehensive automation systems of transformer substations, the reliability and safety of power supply equipment are improved. However, due to the ultra-high tripping rate and the aged operating mechanism, a closing coil of the circuit breaker is continuously burnt out, and circuit reclosing is unsuccessful.
The coil burns out and needs the on-the-spot manual combined floodgate of fortune dimension personnel, has increased fortune dimension personnel work burden, salvagees at night and increases the maintenance workman operation risk. At present, the traditional checking and overhauling method can only regularly measure the actual running condition of the switching-on coil of the outdoor circuit breaker by using a universal meter on site one by means of an overhauling person, regular inspection is needed, the workload is large, the operation risk is high, the flow is more complex, the transformer overhauling staff is limited, and the problem of insufficient staff allocation is solved, so that great difficulty is brought to the transformer overhauling operation.
At present, the outdoor circuit breaker has the defects of severe operating environment, serious equipment aging and high failure rate, so that the tripping problem is obvious, and the prevention method about the burning of the switching coil of the circuit breaker is mostly limited to the working condition monitoring of the switching-on and switching-off loop of the circuit breaker and does not protect the switching-on coil.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a protection device for a closing coil of a circuit breaker, which can be suitable for the closing coil of an outdoor circuit breaker and prevent the opening and closing coil from being burnt out due to overlarge current or overlong current duration in a control loop, thereby improving the reclosing success rate of the old outdoor circuit breaker.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a circuit breaker closing coil protection device, including closing a floodgate return circuit, closing a floodgate return circuit includes: the device comprises a closing module, a monitoring module and a control module;
the switching-on module is configured to receive a switching-on instruction and perform switching-on operation, the switching-on module comprises a switching-on coil, a breaker normally closed contact, a breaker normally open contact and a switching-on standby loop, and the switching-on standby loop is configured to perform standby switching-on operation when the switching-on of the switching-on loop is unsuccessful;
the monitoring module comprises a current detection circuit, the current detection circuit is connected with the switching-on coil, detects the current passing through the switching-on coil and sends the abnormal current to the control module;
the control module is configured to receive the abnormal signal sent by the monitoring module and transmit a closing instruction to the closing module.
Furthermore, the normally closed contact of the circuit breaker is connected with the closing coil and the closing standby loop in series, and the normally open contact of the circuit breaker is connected with the control module in series.
Furthermore, the standby closing loop comprises an intermediate relay, and the intermediate relay is electrically connected with the control module.
Furthermore, the intermediate relay comprises a coil and a normally closed relay contact.
Furthermore, the control module comprises a CPU control circuit, is connected with the closing module and the monitoring module and is used for receiving signals and sending instructions, and the CPU is provided with a CPU timing circuit and is used for timing.
Furthermore, the monitoring module further comprises an alarm circuit, the alarm circuit is formed by connecting a sound indicator and a triode in series, and the triode is connected with the CPU.
Furthermore, the CPU timing circuit starts timing when receiving a closing signal, when the circuit breaker is successfully closed, the normally open contact of the circuit breaker is closed, and the CPU receives the closing success signal and stops timing.
Furthermore, when the CPU timing exceeds the set time and does not receive a closing signal, the CPU outlet acts to conduct the triode, trigger an alarm signal and give an alarm.
Further, the device also comprises a power supply, and the power supply selects 220V direct current.
Further, still include the casing, the combined floodgate return circuit integration is inside the casing, and casing back sets up the buckle for it is fixed.
The embodiment of the invention has the following beneficial effects:
the invention provides a breaker closing coil protection device which can be suitable for outdoor protection of a breaker closing coil, prevent the switch-on and switch-off coil from being burnt due to overlarge current or overlong current duration in a control loop, and improve the reclosing success rate of an old outdoor breaker.
The circuit breaker closing coil protection device improves the safety of a control circuit, eliminates the condition of winding burnout, reduces the time that the circuit breaker cannot be opened and closed, improves the reliability of protection action, has no influence on the operating environment of the circuit breaker control circuit, and has no potential safety hazard. In the aspect of economy, the load loss rate of the system is reduced, and the electricity is more reliable for users; the defect that the number of the staff is insufficient during maintenance work is overcome, the maintenance efficiency of the maintenance staff is improved, the maintenance staff can find the defect in time, the fault range is narrowed, and the defect is eliminated rapidly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of the operation of a circuit breaker closing coil protection device according to the present invention;
FIG. 2 is an internal circuit diagram of the circuit breaker closing coil protection device of the present invention;
fig. 3 is a working schematic diagram of the circuit breaker closing coil protection device of the present invention.
The specific implementation mode is as follows:
it should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
the first embodiment is as follows:
as shown in fig. 2, a first embodiment of the present disclosure provides a circuit breaker closing coil protection device, which includes a closing loop, where the closing loop includes: the device comprises a closing module, a monitoring module and a control module;
the closing module comprises a closing coil, a normally closed contact of the breaker, a normally open contact of the breaker and a closing standby loop and is used for receiving a closing instruction and performing closing operation. The normally closed contact of the circuit breaker is connected with the closing coil and the closing standby loop in series, and the normally open contact of the circuit breaker is connected with the control module in series. The standby closing loop comprises an intermediate relay, the intermediate relay comprises a coil and a relay normally closed contact, and the intermediate relay is electrically connected with the control module. When the circuit breaker is not successfully switched on, the control module cannot receive a successful switching-on signal, and then the switching-on standby loop is started to cut off the circuit breaker operating power supply.
The monitoring module comprises a current detection circuit, the current detection circuit is connected with the switching-on coil, detects the current passing through the switching-on coil and sends the abnormal current to the control module; for example, when the current of the closing coil is suddenly overlarge, the monitoring module sends a current abnormal signal to the control module, and the control module directly sends a closing instruction to the closing standby loop to cut off the closing loop. The monitoring module further comprises an alarm circuit, the alarm circuit is formed by connecting a sound indicator and a triode in series, and the triode is connected with the CPU. When the CPU exceeds the set time and does not receive the closing signal, the CPU outlet acts to conduct the triode, trigger the alarm signal and give an alarm.
The control module comprises a CPU control circuit, is connected with the closing module and the monitoring module, and is used for receiving signals and sending instructions, receiving abnormal signals sent by the monitoring module and transmitting closing instructions to the closing module. The CPU is provided with a CPU timing circuit for timing. When the breaker needs to be switched on, the CPU receives a switching-on signal, the timing circuit starts timing until a switching-on success signal is received, and timing is stopped.
The power supply of the circuit breaker closing coil protection device selects 220V direct current, all circuits of the circuit breaker closing coil protection device are integrated on a printed circuit board, an outer shell made of aluminum alloy is arranged outside the printed circuit board, a closing loop is integrated inside a shell, and the back of the shell is provided with a buckle for fixing so that the circuit breaker closing coil protection device can be installed on a terminal strip.
As shown in fig. 1, the working principle of the present invention is:
when the circuit breaker needs to be switched on, the switching-on coil can pass through current, and meanwhile, the CPU can also receive a switching-on signal to start timing. When the circuit breaker is successfully switched on, the normally closed contact of the auxiliary node of the circuit breaker is disconnected, and a coil in a switching-on loop loses power; meanwhile, the normally open contact of the auxiliary contact of the circuit breaker is closed, and the CPU receives a closing success signal and returns correctly. When the circuit breaker is not successfully switched on, the normally open contact of the auxiliary node of the circuit breaker is not closed, the CPU does not stop timing, when the timing exceeds the set time, the CPU outlet acts, the trigger triode 9014 is switched on, the alarm signal is triggered at the same time, the coil of the intermediate relay KM is switched on, and the normally closed contact is switched off a switching-on loop, so that the coil is prevented from being burnt out due to overlong power-on time.
The circuit breaker closing coil protection device is applied to a circuit shown in fig. 3 for testing, a single chip microcomputer is adopted for intelligently monitoring the action voltage and the action current, and experiments prove that the circuit breaker closing coil protection device achieves the expected target and the success rate is 100%.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a circuit breaker closing coil protection device which characterized in that, includes the closing return circuit, the closing return circuit includes: the device comprises a closing module, a monitoring module and a control module;
the switching-on module is configured to receive a switching-on instruction and perform switching-on operation, the switching-on module comprises a switching-on coil, a breaker normally closed contact, a breaker normally open contact and a switching-on standby loop, and the switching-on standby loop is configured to perform standby switching-on operation when the switching-on of the switching-on loop is unsuccessful;
the monitoring module comprises a current detection circuit, the current detection circuit is connected with the switching-on coil, detects the current passing through the switching-on coil and sends the abnormal current to the control module;
the control module is configured to receive the abnormal signal sent by the monitoring module and transmit a closing instruction to the closing module.
2. The protection device for the closing coil of the circuit breaker as claimed in claim 1, wherein the normally closed contact of the circuit breaker is connected in series with the closing coil and the closing backup loop, and the normally open contact of the circuit breaker is connected in series with the control module.
3. The circuit breaker closing coil protection device of claim 1, wherein the closing backup circuit comprises an intermediate relay, and the intermediate relay is electrically connected to the control module.
4. The circuit breaker closing coil protection device of claim 3, wherein the intermediate relay comprises a coil and a relay normally closed contact.
5. The protection device for the closing coil of the circuit breaker as claimed in claim 1, wherein the control module comprises a CPU control circuit, connected to the closing module and the monitoring module, for receiving signals and sending instructions, and the CPU has a CPU timing circuit for timing.
6. The device for protecting a closing coil of a circuit breaker as claimed in claim 5, wherein the monitoring module further comprises an alarm circuit, the alarm circuit is formed by connecting a sound indicator and a triode in series, and the triode is connected with the CPU.
7. The protection device for the closing coil of the circuit breaker as claimed in claim 5, wherein the CPU timing circuit starts timing when receiving the closing signal, when the circuit breaker is successfully closed, the normally open contact of the circuit breaker is closed, and when the CPU receives the closing success signal, the timing is stopped.
8. The protection device for the closing coil of the circuit breaker as claimed in claim 6, wherein when the CPU timing exceeds the set time and does not receive the closing signal, the CPU outlet acts to turn on the triode, trigger the alarm signal and give an alarm.
9. The protection device for the closing coil of the circuit breaker as claimed in claim 1, further comprising a power supply, wherein the power supply is selected from 220V dc power.
10. The protection device for the closing coil of the circuit breaker as claimed in claim 1, further comprising a housing, wherein the closing loop is integrated inside the housing, and a clip is provided at the back of the housing for fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210645141.3A CN115065035A (en) | 2022-06-09 | 2022-06-09 | Breaker closing coil protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210645141.3A CN115065035A (en) | 2022-06-09 | 2022-06-09 | Breaker closing coil protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115065035A true CN115065035A (en) | 2022-09-16 |
Family
ID=83201017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210645141.3A Pending CN115065035A (en) | 2022-06-09 | 2022-06-09 | Breaker closing coil protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115065035A (en) |
-
2022
- 2022-06-09 CN CN202210645141.3A patent/CN115065035A/en active Pending
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