CN202333773U - Protection device for high-voltage capacitor - Google Patents
Protection device for high-voltage capacitor Download PDFInfo
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- CN202333773U CN202333773U CN 201120456252 CN201120456252U CN202333773U CN 202333773 U CN202333773 U CN 202333773U CN 201120456252 CN201120456252 CN 201120456252 CN 201120456252 U CN201120456252 U CN 201120456252U CN 202333773 U CN202333773 U CN 202333773U
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Abstract
A protection device for a high-voltage capacitor comprises high-voltage current-limiting fuses with one ends connected with the high-voltage capacitor, and first limit switches, and further comprises transmission pieces, wherein the transmission pieces are propped against between the other ends of the high-voltage current-limiting fuses and the first limit switches; the first limit switches are connected with a tripping and closing interlocking circuit; the normally closed contacts of the first limit switches are connected in series with the closing circuit of the tripping and closing interlocking circuit, and the normally open contacts of the first limit switches are connected in parallel with the tripping circuit of the tripping and closing interlocking circuit; when one-phrase circuit, two-phase circuit or three-phase circuit of the high-voltage capacitor cabinet is (are) short-circuited, the high-voltage current-limiting fuses cut off rapidly to generate a lot of gas to form an impact, the transmission pieces act; and at the same time, the normally closed contacts of the first limit switches are switched out, the closing circuit of the tripping and closing interlocking circuit is switched out, while the normally open contacts are switched on, the tripping circuit of the tripping and closing interlocking circuit is switched on, so that the fault current is cut off, and the expansion of the failure is avoided.
Description
[technical field]
The utility model relates to the high voltage protective field, particularly relates to a kind of high-voltage capacitor protective device.
[background technology]
Along with the development of electric power system with modernization industry, the demand of electric energy constantly increases.Capacitor compensation cabinet is to utilize the capacitive reactance of electric capacity to come the induction reactance of compensating inductance load.Reduce reactive current, reach energy-conservation effect.Utilize power factor meter to observe, through the quantity of switching capacitance, power factor reaches or near 1 o'clock, capacitor box was normal.In general capacitor compensation cabinet, make short-circuit protection with the phase spray-by-type fuse, but when high-voltage capacitor breaks down, the fusing of fault phase spray-by-type fuse; But other can continue operation mutually; And power supply does not cut off, and causes fault further to enlarge, as burns the high-voltage motor winding.
[utility model content]
Based on this, be necessary to provide the high-voltage capacitor protective device that a circuitry phase, quarter-phase circuit or three-phase circuit all break down and all can cut off the electricity supply in a kind of high-voltage capacitor cabinet.
A kind of high-voltage capacitor protective device; Comprise high-voltage and current-limitation fuse, first limit switch that an end is connected with high-voltage capacitor; Also comprise driving member; Said driving member is connected between the other end and said first limit switch of said high-voltage and current-limitation fuse; Said first limit switch is connected in the breaker tripping and closing interlock circuit, and the connect in series closing circuit, the normally opened contact that are connected on said breaker tripping and closing interlock circuit of the normally-closed contact of said first limit switch connects in parallel the trip(ping) circuit that is connected on said breaker tripping and closing interlock circuit.
In a preferred embodiment, said driving member is a trip rod.
In a preferred embodiment; Said first limit switch is 3; 3 normally-closed contacts of said first limit switch connect in series and are connected on the closing circuit of said breaker tripping and closing interlock circuit, and 3 normally opened contacts of said first limit switch connect in parallel the trip(ping) circuit that is connected on said breaker tripping and closing interlock circuit.
In a preferred embodiment, also comprise second limit switch, said high-voltage and current-limitation fuse is through said second limit switch and said driving member butt.
In a preferred embodiment, said second limit switch is 3, and 3 normally-closed contacts of said second limit switch connect in series and are connected on said closing circuit, and 3 normally opened contacts of said second limit switch connect in parallel and are connected on said trip(ping) circuit.
In a preferred embodiment, also comprise switch S A, display lamp LD, two ends, said switch S A, display lamp LD series connection back are connected on the live wire, zero line of AC power through low-tension fuse FU4, low-tension fuse FU5 respectively.
In a preferred embodiment; Also comprise charged display module, the live wire input of said charged display unit is connected between said switch S A and the said low-tension fuse FU4, the zero line input is connected between said display lamp LD and the said low-tension fuse FU5, output output three-phase circuit is electrically connected ground connection afterwards through said high-voltage and current-limitation fuse with said high-voltage capacitor; Said charged display unit is used for the single-phase electricity input is converted to three-phase circuit output and shows related data.
In a preferred embodiment, also comprise the voltage-limiting protection module, said voltage-limiting protection module comprises voltage-limiting protector FV1, voltage-limiting protector FV2, voltage-limiting protector FV3, wherein,
Electric wire, V phase electric wire, W phase electric wire connect ground connection after said voltage-limiting protector FV1, voltage-limiting protector FV2, the parallel connection of the voltage-limiting protector FV3 other end mutually with the U of said three-phase circuit respectively for said voltage-limiting protector FV1, voltage-limiting protector FV2, voltage-limiting protector FV3 one end.
In a preferred embodiment, also comprise the operating current show circuit, said operating current show circuit comprises alternating current ammeter A1, alternating current ammeter A2, alternating current ammeter A3, current transformer TA1, current transformer TA2, wherein,
Said alternating current ammeter A1 connects with current transformer TA1, said alternating current ammeter A3 connects with current transformer TA2 the back and the parallelly connected ground connection of said alternating current ammeter A2;
Said current transformer TA1 is near the U phase electric wire of said three-phase circuit, and said current transformer TA2 is near the W phase electric wire of said three-phase circuit.
In a preferred embodiment, also comprise balance resistance R1, balance resistance R2, balance resistance R3 between said high-voltage capacitor and said high-voltage and current-limitation fuse, wherein,
Said balance resistance R1 is connected between the V phase electric wire of U phase electric wire three-phase circuit of said three-phase circuit; Said balance resistance R2 is connected between the W phase electric wire of V phase electric wire three-phase circuit of said three-phase circuit, and said balance resistance R3 is connected between the U phase electric wire of W phase electric wire three-phase circuit of said three-phase circuit.
Above-mentioned high-voltage capacitor protective device, when high-voltage capacitor cabinet when wherein a circuitry phase, quarter-phase circuit or three-phase circuit all break down short circuit, the short circuit current high-voltage and current-limitation fuse of flowing through; The high-voltage and current-limitation fuse quick-break; Produce a large amount of gases and form impulsive forces, link the simultaneously normally-closed contact of first limit switch of driving member action with the high-voltage and current-limitation fuse butt is broken off, the closing circuit of breaker tripping and closing interlock circuit breaks off; Normally opened contact is closed; The trip(ping) circuit of breaker tripping and closing interlock circuit is closed, and the disengagement failure electric current avoids fault further to enlarge.
[description of drawings]
Fig. 1 is the high-voltage capacitor protective device side perspective structure chart in the preferred embodiment;
Fig. 2 is the high-voltage capacitor protective device front perspective structure figure in the preferred embodiment;
Fig. 3 is a breaker tripping and closing interlock circuit schematic diagram in the preferred embodiment;
Fig. 4 is the high-voltage capacitor protective device electrical schematic diagram in the preferred embodiment;
Fig. 5 is the high-voltage capacitor protective device power supply input schematic diagram in the preferred embodiment.
[embodiment]
For the purpose, technical scheme and the advantage that make the utility model is clearer, below in conjunction with accompanying drawing and embodiment, to the utility model further explain.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, the high-voltage capacitor protective device comprises: high-voltage and current-limitation fuse 200, driving member 300, first limit switch 400.
High-voltage and current-limitation fuse 200 1 ends are connected with high-voltage capacitor 100, and driving member 300 is connected between the other end and first limit switch 400 of high-voltage and current-limitation fuse 200.In the present embodiment, the high-voltage capacitance cabinet comprises three groups of high-voltage capacitors 100 that insert the three-phase circuit source, and wherein every group of high-voltage capacitor 100 can comprise several high-voltage capacitances.Therefore, please with reference to Fig. 2, the high-voltage and current-limitation fuse 200 shown in Fig. 1 is three, and series connection inserts on the power line in three-phase circuit source at three groups of high-voltage capacitors 100 respectively.When a circuitry phase, quarter-phase circuit or three-phase circuit all break down in the high-voltage capacitance cabinet, the 200 device quick-breaks that fuse of the high-voltage and current-limitation fuse 200 of flowing through of the short circuit current on the corresponding phase circuit, high-voltage and current-limitation, disengagement failure electric current.High-voltage and current-limitation fuse 200 is vertically mounted in the high-voltage capacitance cabinet.
Driving member 300 is a trip rod, is connected between the other end and first limit switch 400 of high-voltage and current-limitation fuse 200.In other embodiments, driving member 300 can be selected various structure according to the performance of different high-voltage and current-limitation fuses 200, can be connecting rod, wire drawing etc.In the high-voltage capacitance cabinet course of work; When high-voltage and current-limitation fuse 200 quick-breaks; Produce a large amount of gases and form impulsive force, make with driving member 300 generations of high-voltage and current-limitation fuse 200 butts and move, first limit switch with driving member 300 butts produces action simultaneously; Its normally-closed contact is broken off, and normally opened contact is closed.
First limit switch 400 also is called travel switch, and first limit switch 400 is connected in the breaker tripping and closing interlock circuit 600 shown in Fig. 3.The normally-closed contact series connection of first limit switch 400 is at the closing circuit 620 of breaker tripping and closing interlock circuit 600, and normally opened contact also is connected in the trip(ping) circuit 640 of breaker tripping and closing interlock circuit 600.When the normally-closed contact of first limit switch 400 becomes when often opening, closing circuit 620 will break off; Simultaneously; Become normally closedly with the normally opened contact of normally-closed contact interlock, trip(ping) circuit 640 will be closed, causes the combined floodgate into higher level's circuit of high-voltage capacitance cabinet power supply can not be closed; Cause higher level's circuit can not continue as the power supply of high-voltage capacitance cabinet, avoided fault to continue for the power supply of high-voltage capacitance cabinet.First limit switch 400 is band connecting lever limit switch.
In the present embodiment, the high-voltage capacitance cabinet comprises three groups of high-voltage capacitors 100 that insert three phase mains, and then every circuitry phase all needs at least one first limit switch 400 to make switch protection.Therefore first limit switch 400 is 3, and 3 normally-closed contacts of first limit switch 400 (like FU1-F1, FU2-F1 and the FU3-F1 of Fig. 3 output) series connection is at the closing circuit 620 of breaker tripping and closing interlock circuit 600; 3 normally opened contacts of first limit switch 400 (like FU1-F2, FU2-F2 and the FU3-F2 of Fig. 3 output) also are connected in the trip(ping) circuit 640 of breaker tripping and closing interlock circuit 600.In the high-voltage capacitance cabinet course of work; When high-voltage and current-limitation fuse 200 quick-breaks, produce a large amount of gases and form impulsive force, make driving member 300 generation actions with high-voltage and current-limitation fuse 200 butts; First limit switch 400 with driving member 300 butts produces action simultaneously; In closing circuit 620, no matter a circuitry phase, quarter-phase circuit or three-phase circuit all break down in the high-voltage capacitor cabinet with reference to 3 normally-closed contact series connections of figure 3, the first limit switches 400; As long as normally-closed contact has one of them, two whiles or three break off simultaneously, closing circuit 620 will break off.As long as and the normally opened contact that is connected in trip(ping) circuit 640 has one of them, two whiles or three break off simultaneously; Trip(ping) circuit 640 will be worked; Make the combined floodgate of higher level's circuit can not be closed, thereby make higher level's circuit can not continue as the power supply of high-voltage capacitance cabinet, avoided fault to continue.Realized the function that a circuitry phase, quarter-phase circuit or three-phase circuit all break down and all can cut off the electricity supply in the high-voltage capacitor cabinet.
Preferably, the high-voltage capacitor protective device also comprises second limit switch 500, is connected between high-voltage and current-limitation fuse 200 and the driving member 300.Second limit switch 500 and first limit switch 400 are used close; Specific as follows; Second limit switch 500 is 3; 3 normally-closed contact series connections of second limit switch 500 are at 3 normally opened contacts of 620, the second limit switches 500 of the closing circuit shown in Fig. 3 and be connected in the trip(ping) circuit 640 shown in Fig. 3.In the present embodiment, in the high-voltage capacitance cabinet course of work, when high-voltage and current-limitation fuse 200 quick-breaks, produce a large amount of gases and form impulsive force, make to be connected to second limit switch, 500 generation actions between high-voltage and current-limitation fuse 200 and the driving member butt 300.No matter a circuitry phase, quarter-phase circuit or three-phase circuit all break down in the high-voltage capacitor cabinet, as long as normally-closed contact has one of them, two whiles or three break off simultaneously, the closing circuit 620 shown in Fig. 3 will break off.As long as and be connected in that normally opened contact that Fig. 3 illustrates trip(ping) circuit 640 has one of them, two whiles or three break off simultaneously; Trip(ping) circuit 640 will be worked; Make the combined floodgate of higher level's circuit can not be closed, thereby make higher level's circuit can not continue as the power supply of high-voltage capacitance cabinet, avoided fault to continue.Realized the function that a circuitry phase, quarter-phase circuit or three-phase circuit all break down and all can cut off the electricity supply in the high-voltage capacitor cabinet.Second limit switch 500 is band connecting lever limit switch.
As shown in Figure 4; Preferably; The high-voltage capacitor protective device also comprises switch S A, display lamp LD; Two ends, switch S A, display lamp LD series connection back are connected on the live wire, zero line of AC power through low-tension fuse FU4, low-tension fuse FU5 respectively, L0 incoming transport power firestreak, N0 incoming transport zero-power line.Switch S A is used to control lighting and extinguishing of display lamp LD, and the light on and off of display lamp LD are used to show whether operate as normal of high-voltage capacitance cabinet and high-voltage capacitor protective device.Low-tension fuse FU4 and low-tension fuse FU5 are the overcurrent protections of making input to the high-voltage capacitance cabinet; When the overcurrent of AC power input; Low-tension fuse FU4 and/or low-tension fuse FU5 meeting quick-break, the input of cutting off AC power is to be unlikely to letting super-high-current be input to the high-voltage capacitance cabinet to damaging.
As shown in Figure 5; Preferably; The high-voltage capacitor protective device also comprises charged display module 700; The live wire input of charged display unit 700 is connected between switch S A and the low-tension fuse FU4 (being node 01 as shown in Figure 4), zero line input and is connected on (being node N as shown in Figure 4) between said display lamp LD and the said low-tension fuse FU5, output output three-phase electricity; The high-voltage and current-limitation fuse 200 of leading up to is connected back ground connection with high-voltage capacitor electricity 100, and the output of high-voltage capacitance cabinet is done on another road, and wherein the outlet line of U phase, V phase, W phase is respectively L1, L2, L3.Charged display unit 700 is used for the single-phase electricity input is converted to three-phase electricity output and shows related data.Charged display unit 700 converts single-phase electricity input to three-phase electricity output to 100 chargings of high-voltage capacitor electricity, in addition, can show data such as voltage between single-phase electricity conversion three-phase electricity, electric current, phase angle simultaneously.
Preferably, the high-voltage capacitor protective device also comprises voltage-limiting protection module 800, inserts in three-phase electricity on this three-phase circuit road of high-voltage capacitor electricity 100 chargings.Voltage-limiting protection module 800 comprises voltage-limiting protector FV1, voltage-limiting protector FV2, voltage-limiting protector FV3.Wherein, Electric wire, V phase electric wire, W phase electric wire connect ground connection after said voltage-limiting protector FV1, voltage-limiting protector FV2, the parallel connection of the voltage-limiting protector FV3 other end mutually with the U of three-phase circuit respectively for voltage-limiting protector FV1, voltage-limiting protector FV2, voltage-limiting protector FV3 one end.
Preferably, the high-voltage capacitor protective device also comprises operating current show circuit 900, and operating current show circuit 900 comprises alternating current ammeter A1, alternating current ammeter A2, alternating current ammeter A3, current transformer TA1, current transformer TA2.Wherein, alternating current ammeter A1 connects with current transformer TA1, alternating current ammeter A3 connects back and the parallelly connected ground connection of alternating current ammeter A2 with current transformer TA2.Current transformer TA1 is near the U phase electric wire of three-phase circuit, and said current transformer TA2 is near the W phase electric wire of three-phase circuit.Operating current show circuit 900 utilizes current transformer TA1, current transformer TA2 to respond to the size of current on the W phase electric wire of U phase electric wire, three-phase circuit of three-phase circuit respectively, on alternating current ammeter A1, alternating current ammeter A3, is showing size of current numerical value respectively thereafter.
Preferably, the high-voltage capacitor protective device also comprises between high-voltage capacitor 100 and high-voltage and current-limitation fuse 200 balance resistance R1, balance resistance R2, balance resistance R3.Wherein, Balance resistance R1 is connected between the V phase electric wire of U phase electric wire three-phase circuit of three-phase circuit; Balance resistance R2 is connected between the W phase electric wire of V phase electric wire three-phase circuit of three-phase circuit, and balance resistance R3 is connected between the U phase electric wire of W phase electric wire three-phase circuit of three-phase circuit.
Above-mentioned high-voltage capacitor protective device is installed in the high-voltage capacitor cabinet; Access is at three-phase circuit when wherein a circuitry phase, quarter-phase circuit or three-phase circuit all break down short circuit on this three-phase circuit of high-voltage capacitor electricity 100 chargings; The short circuit current high-voltage and current-limitation fuse 200 of flowing through; When high-voltage and current-limitation fuse 200 quick-breaks, produce a large amount of gases and form impulsive force, make driving member 300 generation actions with high-voltage and current-limitation fuse 200 butts; First limit switch 300 with driving member 300 butts produces action simultaneously, and the closing circuit 620 shown in its normally-closed contact fragmentary 3 will be broken off; Simultaneously, become normally closedly with the normally opened contact of normally-closed contact interlock, the trip(ping) circuit 640 shown in Fig. 3 will be closed, causes the combined floodgate for higher level's circuit of high-voltage capacitance cabinet power supply can not closed can not continue as the power supply of high-voltage capacitance cabinet, avoided fault to continue.The trip(ping) circuit of breaker tripping and closing interlock circuit is closed, and the disengagement failure electric current avoids fault further to enlarge.Realized the function that a circuitry phase, quarter-phase circuit or three-phase circuit all break down and all can cut off the electricity supply in the high-voltage capacitor cabinet.
Further, comprise that also second limit switch, 500, the second limit switches 500 that are connected between high-voltage and current-limitation fuse 200 and the driving member butt 300 are identical with 400 application of first limit switch.Therefore, first limit switch 400 occur damaging or other can not work the time, second limit switch 500 can substitute first limit switch 400 and do high-voltage capacitor protection work.
The above embodiment has only expressed several kinds of execution modes of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model.Therefore, the protection range of the utility model patent should be as the criterion with accompanying claims.
Claims (10)
1. high-voltage capacitor protective device; Comprise high-voltage and current-limitation fuse, first limit switch that an end is connected with high-voltage capacitor; It is characterized in that; Also comprise driving member; Said driving member is connected between the other end and said first limit switch of said high-voltage and current-limitation fuse, and said first limit switch is connected in the breaker tripping and closing interlock circuit, and the normally-closed contact series connection of said first limit switch is at closing circuit, the normally opened contact of said breaker tripping and closing interlock circuit and be connected in the trip(ping) circuit of said breaker tripping and closing interlock circuit.
2. high-voltage capacitor protective device according to claim 1 is characterized in that, said driving member is a trip rod.
3. high-voltage capacitor protective device according to claim 1; It is characterized in that; Said first limit switch is 3; 3 normally-closed contact series connections of said first limit switch are at the closing circuit of said breaker tripping and closing interlock circuit, and 3 normally opened contacts of said first limit switch also are connected in the trip(ping) circuit of said breaker tripping and closing interlock circuit.
4. high-voltage capacitor protective device according to claim 1 is characterized in that, also comprises second limit switch, and said high-voltage and current-limitation fuse is through said second limit switch and said driving member butt.
5. high-voltage capacitor protective device according to claim 4; It is characterized in that; Said second limit switch is 3, and 3 normally-closed contact series connections of said second limit switch are at said closing circuit, and 3 normally opened contacts of said second limit switch also are connected in said trip(ping) circuit.
6. high-voltage capacitor protective device according to claim 1; It is characterized in that; Also comprise switch S A, display lamp LD, two ends, said switch S A, display lamp LD series connection back are connected on the live wire, zero line of AC power through low-tension fuse FU4, low-tension fuse FU5 respectively.
7. high-voltage capacitor protective device according to claim 6; It is characterized in that; Also comprise charged display module, the live wire input of said charged display unit is connected between said switch S A and the said low-tension fuse FU4, the zero line input is connected between said display lamp LD and the said low-tension fuse FU5, output output three-phase circuit is electrically connected ground connection afterwards through said high-voltage and current-limitation fuse with said high-voltage capacitor; Said charged display unit is used for the single-phase electricity input is converted to three-phase circuit output and shows related data.
8. high-voltage capacitor protective device according to claim 7 is characterized in that, also comprises the voltage-limiting protection module, and said voltage-limiting protection module comprises voltage-limiting protector FV1, voltage-limiting protector FV2, voltage-limiting protector FV3, wherein,
Electric wire, V phase electric wire, W phase electric wire connect ground connection after said voltage-limiting protector FV1, voltage-limiting protector FV2, the parallel connection of the voltage-limiting protector FV3 other end mutually with the U of said three-phase circuit respectively for said voltage-limiting protector FV1, voltage-limiting protector FV2, voltage-limiting protector FV3 one end.
9. according to claim 7 or 8 described high-voltage capacitor protective devices; It is characterized in that, also comprise the operating current show circuit, said operating current show circuit comprises alternating current ammeter A1, alternating current ammeter A2, alternating current ammeter A3, current transformer TA1, current transformer TA2; Wherein
Said alternating current ammeter A1 connects with current transformer TA1, said alternating current ammeter A3 connects with current transformer TA2 the back and the parallelly connected ground connection of said alternating current ammeter A2;
Said current transformer TA1 is near the U phase electric wire of said three-phase circuit, and said current transformer TA2 is near the W phase electric wire of said three-phase circuit.
10. according to claim 7 or 8 described high-voltage capacitor protective devices, it is characterized in that, also comprise balance resistance R1, balance resistance R2, balance resistance R3 between said high-voltage capacitor and said high-voltage and current-limitation fuse, wherein,
Said balance resistance R1 is connected between the V phase electric wire of U phase electric wire three-phase circuit of said three-phase circuit; Said balance resistance R2 is connected between the W phase electric wire of V phase electric wire three-phase circuit of said three-phase circuit, and said balance resistance R3 is connected between the U phase electric wire of W phase electric wire three-phase circuit of said three-phase circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120456252 CN202333773U (en) | 2011-11-16 | 2011-11-16 | Protection device for high-voltage capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120456252 CN202333773U (en) | 2011-11-16 | 2011-11-16 | Protection device for high-voltage capacitor |
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| Publication Number | Publication Date |
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| CN202333773U true CN202333773U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120456252 Expired - Fee Related CN202333773U (en) | 2011-11-16 | 2011-11-16 | Protection device for high-voltage capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683209A (en) * | 2013-12-11 | 2014-03-26 | 华电智网（天津）科技有限公司 | Identifying method based on high-speed switch type serial compensation system and controller thereof |
| CN117373851A (en) * | 2023-12-07 | 2024-01-09 | 南京瀚元科技有限公司 | Closing interlocking method suitable for user demarcation switch |
-
2011
- 2011-11-16 CN CN 201120456252 patent/CN202333773U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683209A (en) * | 2013-12-11 | 2014-03-26 | 华电智网（天津）科技有限公司 | Identifying method based on high-speed switch type serial compensation system and controller thereof |
| CN117373851A (en) * | 2023-12-07 | 2024-01-09 | 南京瀚元科技有限公司 | Closing interlocking method suitable for user demarcation switch |
| CN117373851B (en) * | 2023-12-07 | 2024-03-08 | 南京瀚元科技有限公司 | Closing interlocking method suitable for user demarcation switch |
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Granted publication date: 20120711 Termination date: 20181116 |