CN207184044U - A kind of antisurge residual voltage interference circuit in relay protection remote signalling loop - Google Patents
A kind of antisurge residual voltage interference circuit in relay protection remote signalling loop Download PDFInfo
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- CN207184044U CN207184044U CN201721101853.XU CN201721101853U CN207184044U CN 207184044 U CN207184044 U CN 207184044U CN 201721101853 U CN201721101853 U CN 201721101853U CN 207184044 U CN207184044 U CN 207184044U
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- residual voltage
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Abstract
A kind of antisurge residual voltage in the relay protection remote signalling loop used the utility model discloses the utility model disturbs circuit, including remote signalling input circuit and antisurge residual voltage process circuit.When the switch pin voltage overrate of switching tube, impedance value between both ends can be changed into high speed by Low ESR from high impedance, a voltage will be so produced in the junction of voltage-stabiliser tube and switching tube, turn on switching tube, make the input of the input resistance of remote signalling input circuit and output end level pulls into, there is no pressure drop on the input resistance of remote signalling input circuit, remote signalling malfunction is eliminated so as to filter out surge residual voltage, ensure the work of remote signalling loop stability, the simple cost of circuit is low simultaneously, it is less to take pcb board space, is easily installed.
Description
Technical field
Technical field of electromagnetic compatibility is the utility model is related to, particularly a kind of antisurge residual voltage in relay protection remote signalling loop
Circuit is disturbed, can reliably filter out surge spike, ensures the work of remote signalling loop stability.
Background technology
With society and expanding economy, people are to power supply reliability, the quality of power supply, the service quality of power department and effect
The requirement more and more higher of rate etc., the construction of distribution automation system also just become the necessarily choosing of domestic various regions electric administrative department
Select, the application of relay protection is increasingly extensive.In protective relaying device, the collection of on-off model is very universal, protection
The position of each input state signal of program of device automatically scanning, each input state signal just participate in related guarantor according to definition
Protect the judgement of logic；Such as finding there is grave gas, overtemperature etc., transformer, the abnormal signal of motor apparatus, then relay protection fill
Put automatic output trip signal and send warning information.
At present, On-off signal loop is usually using electric resistance partial pressure, resistance capacitance filtering, the scheme of light-coupled isolation；This
Sample On-off signal loop is run in the serious environment of electromagnetic interference, because easily causing erroneous judgement most with the presence of induced voltage
Malfunction event failure is produced eventually, causes unnecessary loss.Therefore, protection device will ensure remote signalling in distribution automation system
Amount detection accurately and reliably, otherwise easily causes malfunction.
Utility model content
To solve the above problems, the purpose of this utility model be to provide a kind of antisurge in relay protection remote signalling loop it is residual
Press dry and disturb circuit, can reliably filter out surge spike, ensure the work of remote signalling loop stability.
Technical scheme is used by the invention for solving the technical problem：
A kind of antisurge residual voltage interference circuit in relay protection remote signalling loop, it is characterised in that including：
Remote signalling input circuit, input resistance and remote signalling input circuit output end, institute are provided with the remote signalling input circuit
The output end for stating input resistance is connected with remote signalling input circuit output end；
Antisurge residual voltage process circuit, including control signal and control output end, the antisurge residual voltage process circuit
Also include switching tube and voltage-stabiliser tube, the switch pin of the switching tube is connected with control output end and power cathode respectively, described
Control signal is connected by the control terminal of voltage-stabiliser tube and switching tube；
The input of the control signal and input resistance connects, the output end of the control output end and input resistance
Connection.
When the switch pin voltage overrate of switching tube, meeting is with high speed the impedance value between both ends by height
Impedance is changed into Low ESR, then a voltage will be produced in the junction of voltage-stabiliser tube and switching tube, switching tube is turned on, makes distant
The input and output end level of the input resistance of letter input circuit pull into, do not have on the input resistance of remote signalling input circuit
Pressure drop, remote signalling malfunction is eliminated so as to filter out surge residual voltage.
Further, in addition to the first RC parallel circuits, one end of the first RC parallel circuits and the company of voltage-stabiliser tube and switching tube
Contact is connected, and the other end is connected with power cathode.The electric capacity of first RC parallel circuits is as filter capacitor, the first RC parallel circuits
Resistance voltage-stabiliser tube do not turn on when ensure switching tube reliably cut-off and as the bleeder resistance of filter capacitor.
Further, in addition to it is used for the piezo-resistance for surge voltage being clamped down on certain value, its one end is defeated with input resistance
Enter end connection, the other end is connected with power cathode.Piezo-resistance is protected as the first order, surge voltage can be clamped down on certain
Value.
Further, in addition to the 2nd RC parallel circuits, the 2nd RC parallel circuits be connected in parallel on input resistance output end with
Between power cathode.2nd RC parallel circuits have filter action.
Further, in addition to photo-coupler, the photo-coupler are connected with the remote signalling input circuit output end.Optical coupling
Device realizes the electrical isolation of input and output.
Preferably, the switching tube is triode or FET.
Further, including more than one remote signalling input circuit and antisurge residual voltage process circuit, each remote signalling input back
Described input resistance is provided with road, the control of antisurge residual voltage process circuit corresponding with current remote signalling input circuit is defeated
Enter end and control output end and be respectively connecting to the input and output end of input resistance., can be with when there is the input of multiple switch amount
The remote signalling input circuit and antisurge residual voltage process circuit of respective numbers are configured, it is residual that each On-off signal can filter out surge
Pressure eliminates remote signalling malfunction, has preferable autgmentability.
The beneficial effects of the utility model are：A kind of antisurge in relay protection remote signalling loop that the utility model uses is residual
Press dry and disturb circuit, including remote signalling input circuit and antisurge residual voltage process circuit.When the switch pin voltage of switching tube exceedes volume
During definite value, the impedance value between both ends can be changed into high speed by Low ESR from high impedance, then in voltage-stabiliser tube and switching tube
Junction will produce a voltage, turn on switching tube, make input and the output of the input resistance of remote signalling input circuit
End level is pulled into equally, does not have pressure drop on the input resistance of remote signalling input circuit, and remote signalling malfunction is eliminated so as to filter out surge residual voltage
Make, ensure the work of remote signalling loop stability, while the simple cost of circuit is low, occupancy pcb board space is less, is easily installed.
Brief description of the drawings
The utility model is described in further detail with example below in conjunction with the accompanying drawings.
Fig. 1 is a kind of circuit theory diagrams of the antisurge residual voltage interference circuit in relay protection remote signalling loop of the utility model.
Embodiment
Reference picture 1, a kind of antisurge residual voltage interference circuit in relay protection remote signalling loop of the present utility model, its feature exist
In, including：
Remote signalling input circuit, input resistance 1 and remote signalling input circuit output end, institute are provided with the remote signalling input circuit
The output end for stating input resistance 1 is connected with remote signalling input circuit output end；
Antisurge residual voltage process circuit 2, including control signal 21 and control output end 22, the antisurge residual voltage processing
Circuit 2 also includes switching tube 23 and voltage-stabiliser tube 24, the switch pin of the switching tube 23 respectively with control output end 22 and power supply
Negative pole is connected, and the control signal 21 is connected by voltage-stabiliser tube 24 with the control terminal of switching tube 23；
The control signal 21 is connected with the input of input resistance 1, the control output end 22 and input resistance 1
Output end connects.
When the switch pin voltage overrate of switching tube 23, can with high speed the impedance value between both ends by
High impedance is changed into Low ESR, then will produce a voltage in the junction of voltage-stabiliser tube 24 and switching tube 23, make switching tube 23
Conducting, make the input resistance 1 of remote signalling input circuit input and output end level pull into, the input of remote signalling input circuit
There is no pressure drop on resistance 1, remote signalling malfunction is eliminated so as to filter out surge residual voltage.
Further, in addition to the first RC parallel circuits 25, one end of the first RC parallel circuits 25 and voltage-stabiliser tube 24 and switch
The tie point connection of pipe 23, the other end are connected with power cathode.The electric capacity of first RC parallel circuits 25 is as filter capacitor, and first
The resistance of RC parallel circuits 25 ensures switching tube 23 reliably cut-off and releasing as filter capacitor when voltage-stabiliser tube 24 does not turn on
Resistance.
Further, in addition to for surge voltage being clamped down on the piezo-resistance 3 of certain value, its one end and input resistance 1
Input is connected, and the other end is connected with power cathode.Piezo-resistance 3 is protected as the first order, surge voltage can be clamped down on
Certain value.
Further, in addition to the 2nd RC parallel circuits 4, the 2nd RC parallel circuits 4 are connected in parallel on the output end of input resistance 1
Between power cathode.2nd RC parallel circuits 4 have filter action.
Further, in addition to photo-coupler 5, the photo-coupler 5 are connected with the remote signalling input circuit output end.Optocoupler
Clutch 5 realizes the electrical isolation of input and output.
Preferably, the switching tube 23 is triode or FET.
Further, including more than one remote signalling input circuit and antisurge residual voltage process circuit 2, each remote signalling inputs back
Described input resistance 1, the control of antisurge residual voltage process circuit 2 corresponding with current remote signalling input circuit are provided with road
Input 21 and control output end 22 are respectively connecting to the input and output end of input resistance 1.Inputted when there is multiple switch amount
When, the remote signalling input circuit and antisurge residual voltage process circuit 2 of respective numbers can be configured, each On-off signal can be filtered
Except surge residual voltage eliminates remote signalling malfunction, there is preferable autgmentability.
Described above, simply preferred embodiment of the present utility model, the utility model is not limited to above-mentioned implementation
Mode, as long as it reaches technique effect of the present utility model with identical means, it should all belong to the scope of protection of the utility model.
Claims (7)
- A kind of 1. antisurge residual voltage interference circuit in relay protection remote signalling loop, it is characterised in that including：Remote signalling input circuit, input resistance (1) and remote signalling input circuit output end are provided with the remote signalling input circuit, it is described The output end of input resistance (1) is connected with remote signalling input circuit output end；Antisurge residual voltage process circuit (2), including control signal (21) and control output end (22), at the antisurge residual voltage Reason circuit (2) also includes switching tube (23) and voltage-stabiliser tube (24), and the switch pin of the switching tube (23) exports with control respectively End (22) is connected with power cathode, and the control signal (21) is connected by the control terminal of voltage-stabiliser tube (24) and switching tube (23) Connect；The control signal (21) is connected with the input of input resistance (1), the control output end (22) and input resistance (1) output end connection.
- A kind of 2. antisurge residual voltage interference circuit in relay protection remote signalling loop according to claim 1, it is characterised in that： Also include the first RC parallel circuits (25), one end of the first RC parallel circuits (25) and the company of voltage-stabiliser tube (24) and switching tube (23) Contact is connected, and the other end is connected with power cathode.
- A kind of 3. antisurge residual voltage interference circuit in relay protection remote signalling loop according to claim 1, it is characterised in that： Also including being used for the piezo-resistance (3) for surge voltage being clamped down on certain value, its one end is connected with input resistance (1) input, The other end is connected with power cathode.
- A kind of 4. antisurge residual voltage interference circuit in relay protection remote signalling loop according to claim 1, it is characterised in that： Also include the 2nd RC parallel circuits (4), the 2nd RC parallel circuits (4) are connected in parallel on input resistance (1) output end and born with power supply Between pole.
- A kind of 5. antisurge residual voltage interference circuit in relay protection remote signalling loop according to claim 1, it is characterised in that： Also include photo-coupler (5), the photo-coupler (5) is connected with the remote signalling input circuit output end.
- A kind of 6. antisurge residual voltage interference circuit in relay protection remote signalling loop according to claim 1, it is characterised in that： The switching tube (23) is triode or FET.
- 7. disturbing circuit according to a kind of antisurge residual voltage in any described relay protection remote signalling loops of claim 1-6, it is special Sign is：Including more than one remote signalling input circuit and antisurge residual voltage process circuit (2), set on each remote signalling input circuit Described input resistance (1) is equipped with, the control of antisurge residual voltage process circuit (2) corresponding with current remote signalling input circuit is defeated Enter input and output end that end (21) and control output end (22) is respectively connecting to input resistance (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721101853.XU CN207184044U (en) | 2017-08-30 | 2017-08-30 | A kind of antisurge residual voltage interference circuit in relay protection remote signalling loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721101853.XU CN207184044U (en) | 2017-08-30 | 2017-08-30 | A kind of antisurge residual voltage interference circuit in relay protection remote signalling loop |
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| Publication Number | Publication Date |
|---|---|
| CN207184044U true CN207184044U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721101853.XU Active CN207184044U (en) | 2017-08-30 | 2017-08-30 | A kind of antisurge residual voltage interference circuit in relay protection remote signalling loop |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797982A (en) * | 2019-11-13 | 2020-02-14 | 珠海菲森电力科技有限公司 | Remote signaling acquisition method for distribution automation terminal |
-
2017
- 2017-08-30 CN CN201721101853.XU patent/CN207184044U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797982A (en) * | 2019-11-13 | 2020-02-14 | 珠海菲森电力科技有限公司 | Remote signaling acquisition method for distribution automation terminal |
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