CN105449655B - A kind of Current Transformer Secondary open-circuit-protection method and device - Google Patents
A kind of Current Transformer Secondary open-circuit-protection method and device Download PDFInfo
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- CN105449655B CN105449655B CN201410444859.1A CN201410444859A CN105449655B CN 105449655 B CN105449655 B CN 105449655B CN 201410444859 A CN201410444859 A CN 201410444859A CN 105449655 B CN105449655 B CN 105449655B
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Abstract
The invention discloses a kind of Current Transformer Secondary open-circuit-protection method and devices, the method is monitoring current mutual inductor secondary side circuit voltage, when secondary side is opened a way, voltage can become very big, Current Transformer Secondary side loop short circuit is got up, and remind staff's equipment damage, the device includes shell, driving mechanism, transmission mechanism and short circuit mechanism, the driving mechanism is by relay, electric telescopic rod and connection plug composition, the relay is connected to Current Transformer Secondary side by the connection plug, the relay is connected with electric telescopic rod, the driving mechanism includes pedestal, the pedestal sets drive link by stent, the short circuit mechanism includes copper coin, plug is set below the copper coin, the copper coin wrapped with insulation.The present invention has used the technology of control relay circuit, and when voltage change, relay starts telescopic rod and promotes drive link that short-circuit plug is inserted into secondary side circuit terminal, by secondary side circuit short circuit.
Description
Technical field
The present invention relates to current transformer open-circuit-protection technical fields, and in particular to a kind of Current Transformer Secondary open circuit is protected
Maintaining method and device.
Background technology
In substation, with high voltage and current mutual inductor, its secondary circuit is forbidden to open a way for substation, once secondary break or
Person's contact is bad to be caused to open a way, and high voltage will be generated at broken string according to when load condition is become, up to volts up to ten thousand, and can caused
Secondary insulating punctures, and burns out secondary line, terminal block or even can burn out current transformer or life is caused to injure；Accordingly, it is capable to have
Effect prevents open circuit of secondary loop of current transformer and easy installation and reliable open-circuit protecting device is necessary.And existing protection
Device is mostly setting using the devices such as metal oxide device, discharge tube and the air gap with nonlinear resistance property composition
It is standby to prevent overvoltage from being protected, but it is small to there is discharge capacity, if current transformer is opened a way for a long time, it is more likely that meeting
It is damaged；Gap protection is used, because the effect of secondary overvoltage, gap both ends can be made to generate intermittent electric arc, extremely easily
Burning apparatus.The disclosure of the invention of Publication No. 102709901A a kind of current transformer over-voltage protection method and device, it is described
Method is to gather the current signal of Current Transformer Secondary side；The current signal collected is converted into voltage signal with setting in advance
Fixed protection value is compared, and judges whether the Current Transformer Secondary side is open circuit；When transformed voltage signal is more than
During the preset protection value, secondary loop of mutual inductor described in short circuit, when transformed voltage signal is not more than institute
When stating preset protection value, recover the normal connection status of the current transformer；Described device includes sampling unit, master
Control unit, pressure limited protection circuit and open-circuit-protection action element, the leading-out terminal of the open-circuit-protection action element are connected to institute
Between the leading-out terminal for stating current transformer, which is controlled using aptitude manner, while is opened using mechanical switch completion
Road is protected, and avoid the fever of electronic component under the prior art influences caused by entire circuit.Publication No.
A kind of disclosure of the invention of the 103762557A anti-open-circuit protector and its method of current transformer is related to a kind of electric appliance member
The auxiliary equipment of part especially belongs to a kind of anti-open-circuit protecting device of current transformer.It is characterised in that it includes detection dress
It puts, communication module, control device, open-circuit-protection module and power module, the communication module have time-delay mechanism and communication
Device；And realized respectively by delay chip and Big Dipper chip, wherein, delay chip connection power selection switch and Big Dipper core
Piece, Big Dipper chip connection Anneta module.Its method includes the following steps：Preparation, power supply and communication function detection are protected
Protective loop detection after secondary loop of mutual inductor current detecting, open-circuit-protection and communication, troubleshooting.The invention has
Fault detect timely rapid, effective protective current mutual inductor, safe and reliable good effect.But two inventions are all that structure is answered
It is miscellaneous, it is troublesome in poeration, it is unfavorable for promoting.
The content of the invention
Problem to be solved by this invention is to provide a kind of simple in structure, faster Current Transformer Secondary open circuit of reaction and protects
Maintaining method and device.
A kind of Current Transformer Secondary open-circuit-protection method, it is mutual to electric current by second open circuit protector of current mutual inductor
Sensor secondary side circuit voltage is monitored in real time, when the voltage stabilization or brief fluctuations, is considered as normally, is worked as current transformer
Secondary side circuit voltage raises and is delayed long, then passes through second open circuit protector of current mutual inductor short circuit current mutual inductor two
Secondary side terminal.
The voltage brief fluctuations refer to voltage swing and are no more than safe voltage 5 seconds, and the voltage is raised and is delayed long
Refer to voltage swing and be more than safe voltage 5 seconds.
The second open circuit protector of current mutual inductor reminds periphery staff by voice guard and alarm lamp
Equipment breaks down, and the second open circuit protector of current mutual inductor reminds monitoring center staff by signal projector
Equipment breaks down, and the second open circuit protector of current mutual inductor releases device to current transformer two by reset button
The short circuit state of secondary side.
A kind of second open circuit protector of current mutual inductor, including shell, driving mechanism, transmission mechanism and short circuit mechanism,
The driving mechanism is made of relay, electric telescopic rod and connection plug, and the relay is connected to by the connection plug
Current Transformer Secondary side, the relay are connected with electric telescopic rod, and the driving mechanism includes pedestal, and the pedestal passes through
Stent sets drive link, and described drive link one end is connected with electric telescopic rod, the drive link other end and the short circuit mechanism
Connection, the short circuit mechanism include copper coin, plug, the copper coin wrapped with insulation are set below the copper coin.
The relay is intermediate relay.
Voice guard is set below the shell.
Three alarm lamps are set below the shell.
Setting signal transmitter above the shell.
The plug be six plugs, the terminal jacks corresponding matching with terminal block.
Reset button is set below the shell, and the reset button is connected with the electric telescopic rod.
The beneficial effects of the invention are as follows：The guard method of the present invention, passes through second open circuit protector of current mutual inductor pair
Current Transformer Secondary side loop voltage is monitored in real time, when the voltage stabilization or brief fluctuations, is considered as normally, is worked as electric current
Mutual inductor secondary side circuit voltage raise and be delayed it is long, then it is mutual by second open circuit protector of current mutual inductor short circuit current
The secondary side terminal of sensor.The voltage brief fluctuations refer to voltage swing and are no more than safe voltage 5 seconds, and the voltage is raised and prolonged
When long finger voltage swing be more than safe voltage 5 seconds.When current transformer is not to open a way, the general very little of secondary side voltage is tens
It lies prostrate, once secondary side is opened a way, because magnetomotive force reason voltage can become very big, by Current Transformer Secondary side ports
Short circuit can cancel secondary side open circuit, play the role of protecting circuit and current transformer, notify staff's equipment damage and
When maintenance and repair, can hand-reset after fixing a breakdown, it is ensured that the promptness and security of maintenance work.Using a relay
Control, equipment is simple, and complicated wiring is not required, and relay sets a smaller value, takes delay monitoring that can prevent two
Secondary side current fluctuation and device is caused to be opened, short circuit secondary port, only voltage rise, and maintain certain time do not decline,
Just meeting starting relay protects the secondary side circuit of open circuit.
The second open circuit protector of current mutual inductor reminds periphery staff by voice guard and alarm lamp
Equipment breaks down, and the second open circuit protector of current mutual inductor reminds monitoring center staff by signal projector
Equipment breaks down, and the second open circuit protector of current mutual inductor releases device to current transformer two by reset button
The short circuit state of secondary side.Staff's equipment can be reminded to break down in time, quickly equipment can be carried out maintenance, failure row
After removing, can a key by the shorted contacts of secondary side, be that equipment carries out normal operation.
Apparatus of the present invention include shell, driving mechanism, transmission mechanism and short circuit mechanism, the driving mechanism by relay,
Electric telescopic rod and connection plug composition, the relay is connected to Current Transformer Secondary side by the connection plug, described
Relay is connected with electric telescopic rod, and the driving mechanism includes pedestal, and the pedestal sets drive link, the biography by stent
Lever one end is connected with electric telescopic rod, and the drive link other end is connected with the short circuit mechanism, and the short circuit mechanism includes
Copper coin, the copper coin lower section set plug, the copper coin wrapped with insulation.Connection plug is connected to Current Transformer Secondary side
With the variation of moment monitoring voltage together with relay, once secondary circuit short-circuit occurs, relay just starts electric telescopic rod, utilizes
Lever principle jacks up drive link one side, and stent is arranged among drive link, then the short-circuit plug of drive link opposite side will be to
In the terminal jacks of lower insertion terminal block, Current Transformer Secondary side short circuit is got up, playing protection to secondary side open circuit makees
With.
The relay is intermediate relay.It is low that intermediate relay has the advantages that moisture-proof, dust-proof, small power consumption, temperature rise, and
Possess larger number of contacts and electric shock capacity, carry the higher time-delay mechanism of precision, meet the needs of of the invention, without outside
Delay circuit is connect, with regard to that can accomplish the problem of whether secondary side circuit opens a way accurately judged.
Voice guard is set below the shell.When secondary side is opened a way, voice guard action can remind periphery
Staff note that avoid dangerous generation, and can allow staff's faster reaction, put among repair.
Three alarm lamps are set below the shell.Three alarm lamps reflect current transformer secondary side respectively
Three circuits, different circuits open circuit, corresponding alarm lamp will light, and side is provided to the repair of staff
It helps so that service work is more prone to complete.
Setting signal transmitter above the shell.If protective device and monitoring device periphery do not have staff to exist
, then may not quickly be found after open circuit, then failure cannot be excluded quickly, signal projector can after
The signal opened a way is transmitted to monitoring center after electric appliance action, staff's secondary side open circuit is reminded, improves work
Efficiency.
The plug be six plugs, the terminal jacks corresponding matching with terminal block.Six plugs can be by current transformer
Six port whole short circuits of secondary side, solve the problems, such as secondary side open a way, avoid voltage it is excessive burn secondary circuit equipment with
And current transformer.
Reset button is set below the shell, and the reset button is connected with the electric telescopic rod.The present apparatus is in work
As personnel fix a breakdown after can not automatically reset, add a reset button, be connected with electric telescopic rod, equipment is normally pressed afterwards
Lower reset button, telescopic rod are retracted, and the plug on copper coin are driven to leave the terminal jacks of terminal block so that secondary side circuit equipment
It can work normally.Present device is simple, easy to operate, and secondary side open circuit is judged precisely, rapid to protect, and can effectively solve
Various accidents caused by Current Transformer Secondary side is opened a way.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the structure diagram of second open circuit protector of current mutual inductor of the present invention.
Fig. 2 is the structure diagram inside apparatus of the present invention.
Specific embodiment
Embodiment one
As depicted in figs. 1 and 2：The guard method of the present invention, by second open circuit protector of current mutual inductor to electric current
Mutual inductor secondary side circuit voltage is monitored in real time, when the voltage stabilization or brief fluctuations, is considered as normally, is worked as Current Mutual Inductance
Device secondary side circuit voltage raises and is delayed long, then passes through second open circuit protector of current mutual inductor short circuit current mutual inductor
Secondary side terminal.The voltage brief fluctuations are no more than safe voltage 5 seconds for voltage swing, and the voltage is raised and was delayed
A length of voltage swing is more than safe voltage 5 seconds.When current transformer is not to open a way, the general very little of secondary side voltage is at tens volt one
Under, once secondary side is opened a way, because magnetomotive force reason voltage can become very big, by Current Transformer Secondary side ports short circuit
Secondary side open circuit can be cancelled, play the role of protecting circuit and current transformer, notify staff's equipment damage, tie up in time
Shield is repaired, can hand-reset after fixing a breakdown, it is ensured that the promptness and security of maintenance work.Using a relay control
System, equipment is simple, and complicated wiring is not required, and relay sets a smaller value, takes delay monitoring that can prevent secondary
Side current fluctuation and device is caused to be opened, short circuit secondary port, only voltage rise, and maintain certain time do not decline,
Meeting starting relay protects the secondary side circuit of open circuit.The second open circuit protector of current mutual inductor passes through audible alarm
Device and alarm lamp remind periphery staff's equipment to break down, and the second open circuit protector of current mutual inductor passes through signal
Transmitter reminds monitoring center staff equipment to break down, and the second open circuit protector of current mutual inductor passes through reset
Button releases short circuit state of the device to Current Transformer Secondary side.Staff's equipment can be reminded to break down in time, it can
Quickly to be carried out maintenance to equipment, after troubleshooting, can a key by the shorted contacts of secondary side, be that equipment carries out normal operation.
The present invention also provides a kind of second open circuit protector of current mutual inductor based on the above method, including shell 9, driving machine
Structure, transmission mechanism and short circuit mechanism, the driving mechanism is made of relay 2, electric telescopic rod 12 and connection plug 8, described
The relay 2 is connected to Current Transformer Secondary side by connection plug 8, and the relay 2 is connected with electric telescopic rod 12, institute
Stating driving mechanism includes pedestal 2, and the pedestal 2 sets drive link 3, described 3 one end of drive link and electric expansion by stent 11
Bar 12 connects, and 3 other end of drive link is connected with the short circuit mechanism, and the short circuit mechanism includes copper coin 1, the copper coin 1
Lower section sets plug 13, and the copper coin 1 uses wrapped with insulation.Connection plug 8 is connected to Current Transformer Secondary side and relay 4
The variation of moment monitoring voltage together, once secondary circuit short-circuit occurs, relay 4 just starts electric telescopic rod 12, utilizes lever
Principle jacks up 3 one side of drive link, and stent 11 is arranged among drive link 3, then the short-circuit plug of 3 opposite side of drive link will
It is downwardly into the terminal jacks 14 of terminal block 15, Current Transformer Secondary side short circuit is got up, secondary side open circuit is played
Protective effect.The relay 4 is intermediate relay.It is low excellent that there is intermediate relay moisture-proof, dust-proof, small power consumption, temperature to rise
Point, and possess larger number of contacts and electric shock capacity, the higher time-delay mechanism of precision is carried, meets the needs of of the invention, nothing
It need to be in external delay circuit, with regard to that can accomplish the problem of whether secondary side circuit opens a way accurately judged.The 9 lower section setting sound of shell
Sound alarm 5.When secondary side is opened a way, the action of voice guard 5 can remind the staff on periphery note that avoiding danger
Generation, and can allow staff's faster reaction, put among repair.The plug 13 is six plugs, with terminal block 15
14 corresponding matching of terminal jacks.The port whole short circuit of Current Transformer Secondary side six can be solved secondary side by six plugs
The problem of open circuit, avoid that voltage is excessive to burn secondary circuit equipment and current transformer.
Embodiment two
As depicted in figs. 1 and 2：The present invention also provides a kind of Current Transformer Secondary open-circuit-protections based on the above method
Device, including shell 9, driving mechanism, transmission mechanism and short circuit mechanism, the driving mechanism is by relay 2, electric telescopic rod 12
It is formed with connection plug 8, the relay 2 is connected to Current Transformer Secondary side, the relay 2 by the connection plug 8
It is connected with electric telescopic rod 12, the driving mechanism includes pedestal 2, and the pedestal 2 sets drive link 3 by stent 11, described
3 one end of drive link is connected with electric telescopic rod 12, and 3 other end of drive link is connected with the short circuit mechanism, the short circuit machine
Structure includes copper coin 1, and 1 lower section of copper coin sets plug 13, and the copper coin 1 uses wrapped with insulation.Connection plug 8 is connected to electric current
The variation of mutual inductor secondary side moment monitoring voltage together with relay 4, once secondary circuit short-circuit occurs, relay 4 just starts
Using lever principle, 3 one side of drive link is jacked up for electric telescopic rod 12, and stent 11 is arranged among drive link 3, then drive link 3
The short-circuit plug of opposite side will be downwardly into the terminal jacks 14 of terminal block 15, and Current Transformer Secondary side short circuit is risen
Come, protective effect is played to secondary side open circuit.9 lower section of shell sets three alarm lamps 7.Three alarm lamps
7 reflect three circuits of current transformer secondary side, different circuits open circuit respectively, and corresponding alarm lamp 7 will light,
Help is provided to the repair of staff so that service work is more prone to complete.The plug 13 is six plugs, with end
The terminal jacks 14 of son row 15 are opposite one by one.Six plugs can solve the port whole short circuit of Current Transformer Secondary side six
The problem of secondary side is opened a way, avoids that voltage is excessive to burn secondary circuit equipment and current transformer.
Embodiment three
As depicted in figs. 1 and 2：The present invention also provides a kind of Current Transformer Secondary open-circuit-protections based on the above method
Device, including shell 9, driving mechanism, transmission mechanism and short circuit mechanism, the driving mechanism is by relay 2, electric telescopic rod 12
It is formed with connection plug 8, the relay 2 is connected to Current Transformer Secondary side, the relay 2 by the connection plug 8
It is connected with electric telescopic rod 12, the driving mechanism includes pedestal 2, and the pedestal 2 sets drive link 3 by stent 11, described
3 one end of drive link is connected with electric telescopic rod 12, and 3 other end of drive link is connected with the short circuit mechanism, the short circuit machine
Structure includes copper coin 1, and 1 lower section of copper coin sets plug 13, and the copper coin 1 uses wrapped with insulation.Connection plug 8 is connected to electric current
The variation of mutual inductor secondary side moment monitoring voltage together with relay 4, once secondary circuit short-circuit occurs, relay 4 just starts
Using lever principle, 3 one side of drive link is jacked up for electric telescopic rod 12, and stent 11 is arranged among drive link 3, then drive link 3
The short-circuit plug of opposite side will be downwardly into the terminal jacks 14 of terminal block 15, and Current Transformer Secondary side short circuit is risen
Come, protective effect is played to secondary side open circuit.The 9 top setting signal transmitter 10 of shell.If protective device and
Monitoring device periphery does not have the staff on the scene, then may not quickly be found after open circuit, then failure cannot be by
Quick to exclude, the signal opened a way can be transmitted to monitoring center by signal projector 10 after the action of relay 4, be reminded
Staff's secondary side is opened a way, and improves the efficiency of work.The plug 13 is six plugs, is inserted with the terminal of terminal block 15
14 corresponding matching of hole.The port whole short circuit of Current Transformer Secondary side six can be solved asking for secondary side open circuit by six plugs
Topic, avoids that voltage is excessive to burn secondary circuit equipment and current transformer.9 lower section of shell sets reset button 6, institute
Reset button 6 is stated to be connected with the electric telescopic rod 12.The present apparatus can not automatically reset after staff fixes a breakdown, and add
Add a reset button 6, be connected with electric telescopic rod 12, reset button 6 is pressed after equipment is normal, telescopic rod is retracted, and drives copper
Plug 13 on plate 1 leaves the terminal jacks 14 of terminal block 15 so that secondary side circuit equipment can work normally.
Claims (8)
- A kind of 1. Current Transformer Secondary open-circuit-protection method, it is characterised in that：It is filled by Current Transformer Secondary open-circuit-protection Put and Current Transformer Secondary side loop voltage monitored in real time, when the voltage stabilization or brief fluctuations, be considered as it is normal, when Current Transformer Secondary side loop voltage raise and be delayed it is long, then pass through second open circuit protector of current mutual inductor short circuit electricity The secondary side terminal of current transformer；The second open circuit protector of current mutual inductor includes shell, driving mechanism, transmission mechanism and short circuit mechanism, the drive Motivation structure is made of relay, electric telescopic rod and connection plug, and it is mutual that the relay is connected to electric current by the connection plug Sensor secondary side, the relay are connected with electric telescopic rod, and the driving mechanism includes pedestal, and the pedestal is set up by branch Drive link is put, described drive link one end is connected with electric telescopic rod, and the drive link other end is connected with the short circuit mechanism, institute Stating short circuit mechanism includes copper coin, and plug, the copper coin wrapped with insulation are set below the copper coin；The voltage brief fluctuations refer to voltage swing and are no more than safe voltage 5 seconds, and the voltage raises and the long finger electricity that is delayed Size is pressed to be more than safe voltage 5 seconds.
- 2. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：The current transformer two Secondary open-circuit protecting device reminds periphery staff's equipment to break down by voice guard and alarm lamp, the Current Mutual Inductance Device second open circuit protector reminds monitoring center staff equipment to break down by signal projector, the Current Mutual Inductance Device second open circuit protector releases short circuit state of the device to Current Transformer Secondary side by reset button.
- 3. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：The relay is centre Relay.
- 4. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：It is set below the shell Voice guard.
- 5. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：It is set below the shell Three alarm lamps.
- 6. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：It is set above the shell Signal projector.
- 7. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：The plug is inserted for six Head, the terminal jacks corresponding matching with terminal block.
- 8. Current Transformer Secondary open-circuit-protection method as described in claim 1, it is characterised in that：It is set below the shell Reset button, the reset button are connected with the electric telescopic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410444859.1A CN105449655B (en) | 2014-09-03 | 2014-09-03 | A kind of Current Transformer Secondary open-circuit-protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410444859.1A CN105449655B (en) | 2014-09-03 | 2014-09-03 | A kind of Current Transformer Secondary open-circuit-protection method and device |
Publications (2)
| Publication Number | Publication Date |
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| CN105449655A CN105449655A (en) | 2016-03-30 |
| CN105449655B true CN105449655B (en) | 2018-05-22 |
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| CN201410444859.1A Active CN105449655B (en) | 2014-09-03 | 2014-09-03 | A kind of Current Transformer Secondary open-circuit-protection method and device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866393A (en) * | 2016-06-07 | 2016-08-17 | 苏州龙杰特种纤维股份有限公司 | Filament-used device for detecting broken filament generation position |
| CN110223582B (en) * | 2019-07-09 | 2024-03-26 | 郑州万特电气股份有限公司 | Combined transformer explosion burning demonstration system and demonstration method |
| CN111812991A (en) * | 2020-06-15 | 2020-10-23 | 吉安职业技术学院 | Embedded system and device for controlling indoor electric appliance |
| CN111786360A (en) * | 2020-06-29 | 2020-10-16 | 神华包神铁路集团有限责任公司 | Adapter circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709901A (en) * | 2012-06-14 | 2012-10-03 | 北京恒源利通电力技术有限公司 | Overvoltage protection method and device of current transformer |
| CN103326337A (en) * | 2012-03-19 | 2013-09-25 | 长沙润迅通信设备有限公司 | Safe and reliable current transformer protection device |
| CN103956714A (en) * | 2014-04-24 | 2014-07-30 | 合肥沃华电气技术有限公司 | High-sensitivity multifunctional CT open circuit protection device |
-
2014
- 2014-09-03 CN CN201410444859.1A patent/CN105449655B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326337A (en) * | 2012-03-19 | 2013-09-25 | 长沙润迅通信设备有限公司 | Safe and reliable current transformer protection device |
| CN102709901A (en) * | 2012-06-14 | 2012-10-03 | 北京恒源利通电力技术有限公司 | Overvoltage protection method and device of current transformer |
| CN103956714A (en) * | 2014-04-24 | 2014-07-30 | 合肥沃华电气技术有限公司 | High-sensitivity multifunctional CT open circuit protection device |
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