CN206517035U - Low-voltage distribution cabinet broken neutral line protection device - Google Patents
Low-voltage distribution cabinet broken neutral line protection device Download PDFInfo
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- CN206517035U CN206517035U CN201720258401.6U CN201720258401U CN206517035U CN 206517035 U CN206517035 U CN 206517035U CN 201720258401 U CN201720258401 U CN 201720258401U CN 206517035 U CN206517035 U CN 206517035U
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Abstract
The utility model low-voltage distribution cabinet broken neutral line protection device, belongs to the technical field of electric equipment protection；The technical problem of solution is：There is provided it is a kind of it is simple in construction, easy to implement, being capable of centering line broken string situation the pressure power distribution cabinet broken neutral line protection device and detection method that are judged rapidly；The technical scheme used for：The power input of step-down rectifying circuit is connected with the output end of load side alternating voltage, and the power input that the power supply of step-down rectifying circuit goes out after output end concatenation mu balanced circuit respectively with signal monitoring circuit, logic distinguishing circuit, signal output apparatus is connected；The input of signal monitoring circuit is connected with the neutral conductor of load side alternating voltage, and the output end of signal monitoring circuit is connected with the first input end of logic distinguishing circuit, and the output end of signal output apparatus is connected with the second input of logic distinguishing circuit；Execution circuit is serially connected between logic distinguishing circuit and signal output apparatus；Execution circuit is connected with three-phase ganged breaker.
Description
Technical field
The utility model low-voltage distribution cabinet broken neutral line protection device and detection method, belong to the skill of electric equipment protection
Art field.
Background technology
In the three-phase four-wire system of low voltage distribution transformer neutral-point solid ground, power supply is typically symmetrical, but
Be usually can the asymmetric of three characteristics of the middle term load cause the neutral conductor all the time with the presence of electric current；Because threephase load is uneven, the neutral conductor
Broken string frequently can lead to user's phase voltage and significantly raise, influence electrical equipment safety.
In actual motion, at distribution transformer neutral conductor binding post to low-voltage comprehensive mould assembling general protection switch, due to external force,
Broken neutral line failure easily occurs for the effect such as oxidation, and serious economic loss is brought to user and power supply unit；Therefore need
Broken neutral line protection device is set up in low-voltage distribution cabinet, it is ensured that tripping low pressure can match somebody with somebody rapidly when there is broken neutral line
Electric cabinet master switch, it is ensured that each branched line institute band electrical equipment safety.
At present, low-voltage power distribution switch cabinet broken neutral line protection device mainly has three kinds：
A kind of method is to install multiple grounding on the neutral conductor to realize overvoltage protection, so after breaking, in power supply
Property point and user's neutral point just can by multiple grounding continue connect, but multiple grounding be only applicable to below 10kw loads compared with
Light circuit, it acts on very little when load is slightly weighed, and investment is big, effect is poor, later maintenance workload is big；
Second method is broken neutral line Zero sequence current differential protection, mainly that two no-load voltage ratio very same currents are mutual
Sensor is separately mounted in the neutral conductor and three-phase line of power distribution cabinet；When the neutral conductor is intact, two Current Transformer Secondary sides
Size of current is equal, opposite in phase, relay are failure to actuate, after broken neutral line, and the electric current for flowing through relay is changed into three-phase electricity
Sum is flowed, now starting relay is acted, while signaling to shunt release, circuit breaker trip, load power source is cut off, rises
To the purpose of protection electricity consumption facility, but the type protection device cost is high, wiring complicated；
The third method is overvoltage protection, mainly with per phase voltage, rise is more than specified phase electricity after broken neutral line
Actuating relay jumps main switch during pressure, when the neutral conductor is intact, and the overvoltage relay of three-phase packing is equal to load phase voltage, and is
Power network specified phase voltage, relay is failure to actuate；After broken neutral line, overvoltage can all occur in any phase, and the actuating of relay is simultaneously
Signal to shunt release, circuit breaker trip, cut-out load power source；The type protection device by tri-phase unbalance factor influenceed compared with
Greatly, when the degree of unbalancedness of threephase load is less than 25%, overvoltage protection is active in one's movements, and can accurately judge that the neutral conductor breaks
Line simultaneously acts tripping operation；When threephase load degree of unbalancedness is more than 25%, can occur Severe distortion per phase virtual voltage, cause to sentence
Realize the phenomenon of protection device misoperation occur according to bad.
Utility model content
The utility model overcomes the shortcomings of that prior art is present, and technical problem to be solved is：A kind of structure letter is provided
It is single, easy to implement, being capable of the centering line pressure power distribution cabinet broken neutral line protection device that is judged of broken string situation and inspection rapidly
Survey method.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
Low-voltage distribution cabinet broken neutral line protection device, including step-down rectifying circuit, mu balanced circuit, signal monitoring circuit,
Logic distinguishing circuit, signal output apparatus and execution circuit；The power input of the step-down rectifying circuit is exchanged with load side
The output end of voltage is connected, and the power supply of the step-down rectifying circuit goes out output end and is connected with the power input of mu balanced circuit, institute
State power input, the power input of logic distinguishing circuit of the power output end of mu balanced circuit respectively with signal monitoring circuit
It is connected with the power input of signal output apparatus；The input of the signal monitoring circuit and the neutrality of load side alternating voltage
Line is connected, and the output end of the signal monitoring circuit is connected with the first input end of logic distinguishing circuit, the signal output electricity
The output end on road is connected with the second input of logic distinguishing circuit；Gone here and there between the logic distinguishing circuit and signal output apparatus
It is connected to execution circuit；The execution circuit is connected with three-phase ganged breaker.
Preferably, the circuit structure of the step-down rectifying circuit is：Including transformer T1 and rectifier bridge UR1, the voltage stabilizing
Circuit includes voltage-stablizer U1 and electric capacity C1；The first input end of the transformer T1 primary sides and the L1 phases of load side alternating voltage
Line is connected, and the second input of the transformer T1 primary sides is connected with the L3 phase lines of load side alternating voltage；The transformer
First output end of T1 secondary sides is connected with rectifier bridge UR1 positive ac input end, and the second of the transformer T1 secondary sides
Output end is connected with rectifier bridge UR1 negative sense ac input end, and the output plus terminal of the rectifier bridge UR1 is defeated with voltage-stablizer U1's
Enter to hold VIN to be connected, earth terminal GND and electric capacity C1 one end of the voltage-stablizer U1, rectifier bridge UR1 output negative terminal are connected and be followed by
Ground；The output end VOUT of the voltage-stablizer U1 be connected with the electric capacity C1 other end after and mu balanced circuit power output end V0 phases
Even.
Preferably, the signal monitoring circuit is set in load side including current transformer L1, the current transformer L1
On neutral conductor N, one end after one end series diode D1 of the current transformer L1 with electric capacity C2 one end, resistance R1 is homogeneous
Even；The other end of the electric capacity C2 and the current transformer L1 other end, resistance R2 one end, triode Q1 emitter stage, letter
The output terminals A 0 of number observation circuit is connected；The other end of the resistance R1 is connected with triode Q1 base stage, the triode
Q1 colelctor electrode is connected with the power output end V0 of mu balanced circuit, the other end ground connection of the resistance R2.
The logic distinguishing circuit include single-chip microcomputer U2, resistance R3 and triode Q2, the signal output apparatus include after
Electrical equipment KA and diode D2；The first input end of the single-chip microcomputer U2 is connected with the output terminals A 0 of signal monitoring circuit, the list
Piece machine U2 the second input is connected with resistance R3 one end, and the other end of the resistance R3 is connected with triode Q2 base stage,
The emitter stage of the triode Q2 is connected with the output terminals A 0 of signal monitoring circuit, the colelctor electrode and relay of the triode Q2
KA coil KA1.1 one end, diode D2 negative pole are connected, and the other end and diode D2 of the coil KA1.1 are just
Pole, single-chip microcomputer U2 earth terminal are connected.
Preferably, the execution circuit is arranged on the L1- of load side alternating voltage including electrical apparatus release YT, the electrical apparatus release YT
Between L2 phase lines, the normally opened contact KA1.2 of the relay KA is arranged on electrical apparatus release YT；The electrical apparatus release YT is used to control three
Be connected the break-make of breaker.
Preferably, in addition to：Warning circuit, the warning circuit includes alarm lamp L1 and buzzer BL1, the alarm lamp
L1 one end is connected with the neutral conductor N of low-voltage distribution cabinet load side, and the other end of the alarm lamp L1 is sequentially connected in series buzzer
It is connected after BL1, relay KA normally opened contact KA1.3 with the L1 phase lines of load side alternating voltage.
The utility model has the advantages that compared with prior art.
In the utility model, whether there is a value by monitoring neutral current and judge broken neutral line state, work as the neutral conductor
After broken string, send trip command and cut off three-phase ganged breaker, the utility model is simple in construction, easy to implement, criterion is simple
And be quick on the draw, automatization level is high, can effectively detect broken neutral line situation, industrial applicability is good.
Brief description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is that the circuit structure for the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment one is provided shows
It is intended to；
Fig. 2 is the circuit theory for the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment one is provided
Figure；
Fig. 3 is that the circuit structure for the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment two is provided shows
It is intended to；
Fig. 4 is warning circuit in the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment two is provided
Circuit theory diagrams；
In figure：1 is step-down rectifying circuit, and 2 be mu balanced circuit, and 3 be signal monitoring circuit, and 4 be logic distinguishing circuit, and 5 are
Signal output apparatus, 6 be execution circuit, and 7 be warning circuit.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments；Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all belongs to
The scope protected in the utility model.
Fig. 1 is that the circuit structure for the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment one is provided shows
It is intended to, as shown in figure 1, low-voltage distribution cabinet broken neutral line protection device, it is characterised in that including：Step-down rectifying circuit 1, voltage stabilizing
Circuit 2, signal monitoring circuit 3, logic distinguishing circuit 4, signal output apparatus 5 and execution circuit 6；The step-down rectifying circuit 1
Power input be connected with the output end of load side alternating voltage, the power supply of the step-down rectifying circuit 1 go out output end with it is steady
The power input of volt circuit 2 is connected, and the power supply of the power output end of the mu balanced circuit 2 respectively with signal monitoring circuit 3 is defeated
Enter end, the power input of logic distinguishing circuit 4 with the power input of signal output apparatus 5 to be connected；The signal monitoring electricity
The input on road 3 is connected with the neutral conductor of load side alternating voltage, output end and the logic discrimination electricity of the signal monitoring circuit 3
The first input end on road 4 is connected, and the output end of the signal output apparatus 5 is connected with the second input of logic distinguishing circuit 4；
Execution circuit 6, the execution circuit are serially connected between the logic distinguishing circuit 4 and signal output apparatus 5（6）With three-phase ganged
Breaker is connected.
In the utility model, whether there is a value by monitoring neutral current and judge broken neutral line state, work as the neutral conductor
After broken string, send trip command and cut off three-phase ganged breaker, the utility model is simple in construction, easy to implement, criterion is simple
And be quick on the draw, automatization level is high, can effectively detect broken neutral line situation, industrial applicability is good.
When the utility model is used：
First, the power input of step-down rectifying circuit 1 is connected with the output end of load side alternating voltage, and the decompression is whole
The output end of current circuit 1 is connected with the input of mu balanced circuit 2, and the power output end of the mu balanced circuit 2 is supervised with signal respectively
Power input, the power input of logic distinguishing circuit 4 of slowdown monitoring circuit 3 are connected with the power input of signal output apparatus 5；
Secondly, the input of signal monitoring circuit 3 is connected with the neutral conductor of load side alternating voltage, the signal monitoring electricity
The output end on road 3 is connected with the first input end of logic distinguishing circuit 4；The output end of the signal output apparatus 5 is sentenced with logic
Second input of other circuit 4 is connected；
Finally, the signal that logic distinguishing circuit 4 is inputted according to first input end and the second input is judged, works as neutrality
Line sends instruction to execution circuit 6 when breaking；Execution circuit 6 receives instruction so that three-phase ganged breaker disconnects.
Fig. 2 is the circuit theory for the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment one is provided
Figure, as shown in Figure 2：The circuit structure of the step-down rectifying circuit 1 is：Including transformer T1 and rectifier bridge UR1, the voltage stabilizing electricity
Road 2 includes voltage-stablizer U1 and electric capacity C1；The first input end of the transformer T1 primary sides and the L1 phases of load side alternating voltage
Line is connected, and the second input of the transformer T1 primary sides is connected with the L3 phase lines of load side alternating voltage；The transformer
First output end of T1 secondary sides is connected with rectifier bridge UR1 positive ac input end, and the second of the transformer T1 secondary sides
Output end is connected with rectifier bridge UR1 negative sense ac input end, and the output plus terminal of the rectifier bridge UR1 is defeated with voltage-stablizer U1's
Enter to hold VIN to be connected, earth terminal GND and electric capacity C1 one end of the voltage-stablizer U1, rectifier bridge UR1 output negative terminal are connected and be followed by
Ground；The output end VOUT of the voltage-stablizer U1 be connected with the electric capacity C1 other end after and mu balanced circuit 2 power output end V0 phases
Even；The interface of L1, L3 phase line of transformer T1 described in the utility model and load side 380V alternating voltages is provided with fusing
Device, the fuse is used for the Electrical Safety for protecting whole device, in order to avoid burning apparatus；In the present embodiment one, the rectifier bridge
Alternating current is changed into 15V direct current by UR1；The mu balanced circuit 2 exports+5V direct current.
Specifically, the signal monitoring circuit 3 is set in load side including current transformer L1, the current transformer L1
On neutral conductor N, one end after one end series diode D1 of the current transformer L1 with electric capacity C2 one end, resistance R1 is homogeneous
Even；The other end of the electric capacity C2 and the current transformer L1 other end, resistance R2 one end, triode Q1 emitter stage, letter
The output terminals A 0 of number observation circuit 3 is connected；The other end of the resistance R1 is connected with triode Q1 base stage, the triode
Q1 colelctor electrode is connected with the power output end V0 of mu balanced circuit 2, the other end ground connection of the resistance R2；In the present embodiment one,
The triode Q1 is NPN type triode, and the diode D1, which can be played, prevents reverse current from flowing back to the neutral conductor, and influence is once
Loop；Electric capacity C2 plays a part of filtering.
The logic distinguishing circuit 4 includes single-chip microcomputer U2, resistance R3 and triode Q2, and the signal output apparatus 5 includes
Relay KA and diode D2；The first input end of the single-chip microcomputer U2 is connected with the output terminals A 0 of signal monitoring circuit 3, described
Single-chip microcomputer U2 the second input is connected with resistance R3 one end, the other end of the resistance R3 and triode Q2 base stage phase
Even, the emitter stage of the triode Q2 is connected with the output terminals A 0 of signal monitoring circuit 3, the colelctor electrode of the triode Q2 and after
Electrical equipment KA coil KA1.1 one end, diode D2 negative pole are connected, the other end and the diode D2 of the coil KA1.1
Positive pole, single-chip microcomputer U2 earth terminal be connected；The triode Q2 is PNP type triode；The diode D2 is afterflow two
Pole pipe；The role of described diode D2 is：In the present embodiment one, when being cut off the electricity supply due to three-phase ganged breaker 8, according to
Lenz's law, has high voltage by relay KA, triode Q2, in order to which protective relay KA, triode Q2 are not burned out,
Here provided with diode D2.
Further, the execution circuit 6 is arranged on load side alternating voltage including electrical apparatus release YT, the electrical apparatus release YT
Between L1-L2 phase lines, the normally opened contact KA1.2 of the relay KA is arranged on electrical apparatus release YT；The electrical apparatus release YT is used to control
The break-make of three-phase ganged breaker processed.
Fig. 3 is that the circuit structure for the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment two is provided shows
It is intended to；Fig. 4 is the electricity of warning circuit in the low-voltage distribution cabinet broken neutral line protection device that the utility model embodiment two is provided
Road schematic diagram；As shown in Figure 3, Figure 4, it may also include：Warning circuit 7, the warning circuit 7 includes alarm lamp L1 and buzzer
BL1, one end of the alarm lamp L1 is connected with the neutral conductor N of low-voltage distribution cabinet load side, the other end of the alarm lamp L1 according to
It is connected after secondary concatenation buzzer BL1, relay KA normally opened contact KA1.3 with the L1 phase lines of low-voltage distribution cabinet load side；It is described
Warning circuit 6 cut off three-phase ganged breaker while can send sound and light alarm information, to staff play warning make
With.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (6)
1. low-voltage distribution cabinet broken neutral line protection device, it is characterised in that：Including：Step-down rectifying circuit（1）, mu balanced circuit
（2）, signal monitoring circuit（3）, logic distinguishing circuit（4）, signal output apparatus（5）And execution circuit（6）；
The step-down rectifying circuit（1）Power input be connected with the output end of load side alternating voltage, the step-down rectifier
Circuit（1）Power supply go out output end and mu balanced circuit（2）Power input be connected, the mu balanced circuit（2）Power supply output
End respectively with signal monitoring circuit（3）Power input, logic distinguishing circuit（4）Power input and signal output apparatus
（5）Power input be connected；
The signal monitoring circuit（3）Input be connected with the neutral conductor of load side alternating voltage, the signal monitoring circuit
（3）Output end and logic distinguishing circuit（4）First input end be connected, the signal output apparatus（5）Output end with patrolling
Collect judging circuit（4）The second input be connected；
The logic distinguishing circuit（4）And signal output apparatus（5）Between be serially connected with execution circuit（6）；The execution circuit（6）
It is connected with three-phase ganged breaker.
2. low-voltage distribution cabinet broken neutral line protection device according to claim 1, it is characterised in that：The step-down rectifier
Circuit（1）Circuit structure be：Including transformer T1 and rectifier bridge UR1, the mu balanced circuit（2）Including voltage-stablizer U1 and electric capacity
C1；
The first input end of the transformer T1 primary sides is connected with the L1 phase lines of load side alternating voltage, the transformer T1 mono-
Second input of secondary side is connected with the L3 phase lines of load side alternating voltage；First output end of the transformer T1 secondary sides with
Rectifier bridge UR1 positive ac input end is connected, the second output end of the transformer T1 secondary sides and rectifier bridge UR1 negative sense
Ac input end is connected, and the output plus terminal of the rectifier bridge UR1 is connected with voltage-stablizer U1 input VIN, the voltage-stablizer U1
Earth terminal GND be connected with electric capacity C1 one end, rectifier bridge UR1 output negative terminal after be grounded；The output end of the voltage-stablizer U1
VOUT be connected with the electric capacity C1 other end after and mu balanced circuit（2）Power output end V0 be connected.
3. low-voltage distribution cabinet broken neutral line protection device according to claim 2, it is characterised in that：The signal monitoring
Circuit（3）Including current transformer L1, the current transformer L1 is set on load side neutral conductor N, the current transformer
It is connected with electric capacity C2 one end, resistance R1 one end after L1 one end series diode D1；
The other end of the electric capacity C2 and the current transformer L1 other end, resistance R2 one end, triode Q1 emitter stage, letter
Number observation circuit（3）Output terminals A 0 be connected；
The other end of the resistance R1 is connected with triode Q1 base stage, the colelctor electrode and mu balanced circuit of the triode Q1（2）
Power output end V0 be connected, the other end of resistance R2 ground connection.
4. low-voltage distribution cabinet broken neutral line protection device according to claim 3, it is characterised in that：The logic discrimination
Circuit（4）Including single-chip microcomputer U2, resistance R3 and triode Q2, the signal output apparatus（5）Including relay KA and diode
D2；
The first input end and signal monitoring circuit of the single-chip microcomputer U2（3）Output terminals A 0 be connected, the of the single-chip microcomputer U2
Two inputs are connected with resistance R3 one end, and the other end of the resistance R3 is connected with triode Q2 base stage, the triode
Q2 emitter stage and signal monitoring circuit（3）Output terminals A 0 be connected, the colelctor electrode of the triode Q2 and relay KA line
Enclose KA1.1 one end, diode D2 negative pole to be connected, the other end of the coil KA1.1 and diode D2 positive pole, monolithic
Machine U2 earth terminal is connected.
5. low-voltage distribution cabinet broken neutral line protection device according to claim 4, it is characterised in that：The execution circuit
（6）Including electrical apparatus release YT, the electrical apparatus release YT is arranged between the L1-L2 phase lines of load side alternating voltage, the relay KA
Normally opened contact KA1.2 be arranged on electrical apparatus release YT；The electrical apparatus release YT is used for the break-make for controlling three-phase ganged breaker.
6. low-voltage distribution cabinet broken neutral line protection device according to claim 5, it is characterised in that：Also include：Alarm
Circuit（7）, the warning circuit（7）Including alarm lamp L1 and buzzer BL1, one end of the alarm lamp L1 and low-voltage distribution cabinet
The neutral conductor N of load side is connected, and the other end of the alarm lamp L1 is sequentially connected in series buzzer BL1, relay KA normally opened contact
It is connected after KA1.3 with the L1 phase lines of load side alternating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720258401.6U CN206517035U (en) | 2017-03-16 | 2017-03-16 | Low-voltage distribution cabinet broken neutral line protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720258401.6U CN206517035U (en) | 2017-03-16 | 2017-03-16 | Low-voltage distribution cabinet broken neutral line protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206517035U true CN206517035U (en) | 2017-09-22 |
Family
ID=59870230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720258401.6U Withdrawn - After Issue CN206517035U (en) | 2017-03-16 | 2017-03-16 | Low-voltage distribution cabinet broken neutral line protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206517035U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972462A (en) * | 2017-03-16 | 2017-07-21 | 国网山西省电力公司晋城供电公司 | Low-voltage distribution cabinet broken neutral line protection device and detection method |
| CN112931482A (en) * | 2021-01-15 | 2021-06-11 | 国网山西省电力公司晋城供电公司 | Shaft tower drives bird ware |
-
2017
- 2017-03-16 CN CN201720258401.6U patent/CN206517035U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972462A (en) * | 2017-03-16 | 2017-07-21 | 国网山西省电力公司晋城供电公司 | Low-voltage distribution cabinet broken neutral line protection device and detection method |
| CN106972462B (en) * | 2017-03-16 | 2020-02-21 | 国网山西省电力公司晋城供电公司 | Low-voltage distribution cabinet neutral line breakage protection device |
| CN112931482A (en) * | 2021-01-15 | 2021-06-11 | 国网山西省电力公司晋城供电公司 | Shaft tower drives bird ware |
| CN112931482B (en) * | 2021-01-15 | 2022-06-07 | 国网山西省电力公司晋城供电公司 | Shaft tower drives bird ware |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170922 Effective date of abandoning: 20200221 |
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| AV01 | Patent right actively abandoned |