CN203931931U - A kind of high-voltage switchgear vacuum circuit breaker - Google Patents
A kind of high-voltage switchgear vacuum circuit breaker Download PDFInfo
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- CN203931931U CN203931931U CN201420394910.8U CN201420394910U CN203931931U CN 203931931 U CN203931931 U CN 203931931U CN 201420394910 U CN201420394910 U CN 201420394910U CN 203931931 U CN203931931 U CN 203931931U
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- vacuum
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- analog signal
- voltage switchgear
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Abstract
The utility model discloses the high-voltage switchgear vacuum circuit breaker that a kind of model is VF1-12, include solid sealed pole of vacuum arc-extinguishing chamber and conductive contact, in described solid sealed pole of vacuum arc-extinguishing chamber, be provided with vacuum interrupter, in order to ensure the safe operation of whole vacuum circuit-breaker, in above-mentioned vacuum circuit-breaker, be provided with vacuum degree monitoring device and device for detecting temperature, monitor in real time the vacuum degree variation of breaker vacuum arc control device and the variations in temperature of conductive contact by above-mentioned vacuum degree monitoring device and device for detecting temperature, prevent from leaking or conductive contact is overheated causes whole vacuum circuit-breaker to damage due to vacuum interrupter, affect its safe operation.In addition; in order to prevent that chassis vehicle is stuck and to realize intellectualized operation; what chassis vehicle of the present utility model adopted is that electric chassis truck replaces manual chassis vehicle; controller can be obstructed while reaching protective condition immediately to motor braking in electric handcart drive motors running; reverse drive motors is removed stuck state, avoids the damage of mechanism.
Description
Technical field
The utility model relates to vacuum circuit-breaker technical field, particularly relates to a kind of high-voltage switchgear vacuum circuit breaker.
Background technology
Vacuum circuit-breaker is a kind of electric elements that are often applied in high-tension switch cabinet.
In prior art, as disclosed a kind of handcart type vacuum breaker for solid insulating high voltage switch cabinet in the Chinese utility model patent prospectus that is 201120277603.8 in the patent No., it comprises conducting rod, lower conducting rod, solid sealed pole of vacuum arc-extinguishing chamber, circuit breaker frame, operating mechanism, handcart-type chassis vehicle, described solid sealed pole of vacuum arc-extinguishing chamber comprises epoxy package, upper conductive contact, lower conductive contact, vacuum interrupter and silastic cord breaker, vacuum interrupter, upper conductive contact, lower conductive contact is all encapsulated in epoxy package.Upper and lower conducting rod surface adopts the dual solid insulation technology of sulfuration insulating barrier, the isolation of epoxy resin conduit, while connection with solid sealed pole of vacuum arc-extinguishing chamber, adopt plug-in type silicone rubber sleeve and silica gel that docking port is sealed, ensured upper and lower conducting rod under minimum phase spacing over the ground and phase insulation level.
Handcart type vacuum breaker for solid insulating high voltage switch cabinet in above-mentioned patent, in order to ensure the indoor vacuum degree of vacuum extinction, what adopt is hermetic structure, therefore cannot monitor by conventional vacuum-degree monitoring equipment the vacuum degree of vacuum extinction chamber interior, thus in the time there is slight bleed vacuum degree decline in vacuum interrupter, cannot monitor this variation the very first time, there is potential safety hazard.In addition, vacuum circuit-breaker conductive contact in above-mentioned patent is in During Process of Long-term Operation, because the reasons such as plug in trouble, surface oxidation, couple corrosion, excess load, ring temperature are too high, improper ventilation cause, contact resistance is excessive to generate heat, and the temperature of these heating positions is difficult to find in time, also can often cause thus the generation of accident, affect the safe operation of circuit breaker.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of high-voltage switchgear vacuum circuit breaker that can ensure safe operation for the above-mentioned state of the art.
For achieving the above object, the utility model provides
the first technical scheme is as follows:
A kind of high-voltage switchgear vacuum circuit breaker, includes solid sealed pole of vacuum arc-extinguishing chamber, in described solid sealed pole of vacuum arc-extinguishing chamber, is provided with vacuum interrupter, and wherein, this vacuum circuit-breaker also includes vacuum degree monitoring device, and described vacuum degree monitoring device includes
Vacuum transducer, is arranged in described vacuum interrupter, for converting the vacuum-pressure signal of vacuum interrupter to the signal of telecommunication;
Signal picker, the signal of telecommunication producing for gathering vacuum transducer, and by signal of telecommunication transmission;
Signal processor, for receiving the signal of telecommunication of signal picker transmission and processing, and the mode transmission with the signal of telecommunication by result.
Preferably described vacuum degree monitoring device also includes breaker mechanism as of the present utility model, with described signal processor coupling, and in the time receiving the abnormal signal that signal processor transmits, main circuit that can cutting platform high-voltage switchgear vacuum circuit breaker.
As improvement of the present utility model, described high-voltage switchgear vacuum circuit breaker also includes circuit breaker frame, be provided with controller on described circuit breaker cradle side, in described controller, single-chip microcomputer be installed, described signal picker and signal processor are integrated in this single-chip microcomputer.
As further improvement of the utility model, in described circuit breaker frame, controller has display screen, and described display screen and the coupling of described single-chip microcomputer, for display result on screen.
As of the present utility model preferred, the described signal of telecommunication is to pass through infrared transmission.
The utility model adopts for solving aforementioned technical problem
the second technical scheme is as follows:
A kind of high-voltage switchgear vacuum circuit breaker, includes solid sealed pole of vacuum arc-extinguishing chamber, on described solid sealed pole of vacuum arc-extinguishing chamber, is provided with conductive contact, it is characterized in that: also include device for detecting temperature, described device for detecting temperature comprises
Temperature sensor, is arranged on described conductive contact, for converting the variations in temperature of conductive contact to wireless signal;
Signal picker, the wireless signal producing for collecting temperature transducer, and by wireless signal transmission;
Signal processor, for receiving the wireless signal of signal picker transmission and processing, and the form transmission with wireless signal by result.
As improvement of the present utility model, described high-voltage switchgear vacuum circuit breaker also includes photoelectricity barrier box, for eliminating the interference of extraneous noise to signal picker, signal processor.
As further improvement of the utility model, described temperature sensor is ring-type, is wrapped on described conductive contact.
As of the present utility model preferred, described high-voltage switchgear vacuum circuit breaker also includes circuit breaker frame and electric chassis truck, and described circuit breaker frame is fixed on described electric chassis truck, and can move with described electric chassis truck.
The utility model solves the problems of the technologies described above employing
the third technical scheme is as follows:
A kind of high-voltage switchgear vacuum circuit breaker, include solid sealed pole of vacuum arc-extinguishing chamber, on described solid sealed pole of vacuum arc-extinguishing chamber, be provided with conductive contact, in described solid sealed pole of vacuum arc-extinguishing chamber, be provided with vacuum interrupter, wherein, also include vacuum degree monitoring device, described vacuum degree monitoring device includes
Vacuum transducer, is arranged in described vacuum interrupter, for converting the vacuum-pressure signal of vacuum interrupter to analog signal;
First signal collector, the analog signal producing for gathering vacuum transducer, and analog signal is sent to signal processor;
First signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result;
Also include device for detecting temperature, described device for detecting temperature comprises
Temperature sensor, is arranged on described conductive contact, for converting the variations in temperature of conductive contact to analog signal;
Secondary signal collector, the analog signal producing for collecting temperature transducer, and analog signal is sent to signal processor;
Secondary signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result.
Compared with prior art, the utility model has the advantage of: by vacuum degree monitoring device or device for detecting temperature are set in high-voltage switchgear vacuum circuit breaker, or be that vacuum degree monitoring device and device for detecting temperature are set simultaneously, make vacuum circuit-breaker of the present utility model there is the function that can carry out in real time real time on-line monitoring to the temperature of the indoor vacuum degree of vacuum extinction or conductive contact, once above-mentioned vacuum degree, the temperature of conductive contact occurs abnormal, can the very first time signal be passed to signal processor processes, the main circuit of cut-off breaker, guarantee the fail safe of circuit breaker work.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment middle-high voltage switch vacuum circuit-breaker of the utility model the first technical scheme;
Fig. 2 is the end view of the high-voltage switchgear vacuum circuit breaker in embodiment illustrated in fig. 1;
Fig. 3 is the schematic flow sheet of the vacuum degree monitoring device in embodiment illustrated in fig. 1;
Fig. 4 is the structural representation of the embodiment middle-high voltage switch vacuum circuit-breaker of the utility model the second technical scheme;
Fig. 5 is the internal structure schematic diagram of the conductive contact in embodiment illustrated in fig. 4;
Fig. 6 is the schematic flow sheet of the device for detecting temperature in embodiment illustrated in fig. 4;
Fig. 7 is the structural representation of the embodiment middle-high voltage switch vacuum circuit-breaker of the third technical scheme of the utility model.
Reference numeral:
1, solid sealed pole of vacuum arc-extinguishing chamber; 2, vacuum interrupter; 3, vacuum sensor; 4, circuit breaker frame; 5, vacuum degree control device; 6, conductive contact; 61, upper conductive contact; 62, lower conductive contact; 7, electric chassis truck; 8, temperature sensor.
Embodiment
Below in conjunction with accompanying drawing embodiment, high-voltage switchgear vacuum circuit breaker of the present utility model is described in further detail.
The embodiment of the first technical scheme of the present utility model as depicted in figs. 1 and 2, the present embodiment is a kind of high-voltage switchgear vacuum circuit breaker, include solid sealed pole of vacuum arc-extinguishing chamber 1 and circuit breaker frame 4, in the other controller (not shown) that is provided with of circuit breaker frame, in described solid sealed pole of vacuum arc-extinguishing chamber, be provided with vacuum interrupter 2, this high-voltage switchgear vacuum circuit breaker also includes vacuum degree monitoring device, this vacuum degree monitoring device is for carrying out a real time on-line monitoring to the vacuum degree of vacuum interrupter, and the result feedback that can monitoring be obtained in the very first time is to being arranged in the other controller (not shown) of above-mentioned circuit breaker, the core of this controller is an industrial microcomputer, in this industrial microcomputer, be integrated with control chip, this control chip can be single-chip microcomputer or PLC.
Aforesaid vacuum degree monitoring device includes vacuum sensor 3.This vacuum transducer is arranged in described vacuum interrupter, and its effect is to convert the vacuum-pressure signal in vacuum interrupter to analog signal, and as a rule, this analog signal is the signal of telecommunication.In order to ensure the vacuum degree of vacuum interrupter, aforesaid vacuum sensor was just placed in vacuum interrupter 2 in advance before solid sealed pole of vacuum arc-extinguishing chamber 1 is completely sealed, and then whole solid sealed pole of vacuum arc-extinguishing chamber 1 is sealed up, thereby can cause that vacuum degree declines by Leakage prevention.Here, because vacuum sensor 3 is completely sealed in vacuum interrupter 2, in order not destroy the vacuum degree of vacuum interrupter, the electrical signal transfer that has adopted infrared transmission technology that vacuum transducer 3 is generated at the present embodiment is gone out, and does not adopt holding wire conventional in prior art.
In the single-chip microcomputer of aforementioned controller, be integrated with signal picker and signal processor, above-mentioned signal picker is the automation equipment with on-the-spot real-time data acquisition, processing capacity, be mainly used in gathering the signal of telecommunication that vacuum sensor produces, and the signal of telecommunication is sent to signal processor.
Signal processor, claim again the DSP abbreviation of (digital signal processor), it is a kind of microprocessor chip that is used for specially realizing signal processing algorithm, be mainly used in receiving the signal of telecommunication that signal picker transmits and process, then converting the signal of telecommunication receiving to normal signal according to result or abnormal signal sends in circuit breaker actuating mechanism.
Described vacuum degree monitoring device also includes breaker mechanism, and by infrared transmission or the coupling of Radio Transmission Technology signal processor, in the time receiving the normal signal of signal processor transmission, this breaker mechanism is normally worked with aforesaid signal processor.And once the abnormal signal that receives signal processor transmission, this circuit breaker actuating mechanism can cut off the main circuit of whole high-voltage switchgear vacuum circuit breaker.
In described circuit breaker frame, be provided with display screen 5, described display screen 5 and described single-chip microcomputer coupling, for display result on screen, and can be attached to the function of reporting to the police on display screen.
Concrete monitoring parameter is as follows:
Gas pressure intensity monitoring range: 10 ° of Pa～10 of effective range
-3pa; Under monitor operating state, show: when acquisition time, the monitor system time of gas pressure intensity and vacuum level, current gas pressure intensity data in three-phase vacuum interrupter; The indoor gas pressure intensity of three-phase vacuum extinction is with half order of magnitude segmentation in interval demonstration in effective range, and vacuum level shows and represents with round dot color (green, yellow, red); Gas pressure intensity and vacuum level relation: numeral shows < 5 × 10
-3pa, 5 × 10
-3pa, 1 × 10
-2when Pa, vacuum level is aobvious green, is safe vacuum grade.When numeral shows 5 × 10
-2when Pa, vacuum level displaing yellow, is excessive property vacuum level.When numeral shows 1 × 10
-1pa, >1 × 10
-1when Pa, vacuum level is aobvious red, is dangerous vacuum level; Warning performance: when showing 5 × 10
-2when Pa, send indicative chimes of doom, point out gas pressure intensity in these phase arc control device to rise to critical condition, should change.When numeral shows 1 × 10
-1pa, >1 × 10
-1when Pa, send long-time chimes of doom, point out these phase arc control device to lose connecting-disconnecting function; Can be connected with master-control room computer by communication interface at line vacuum monitor, user not only observes at the scene, can also (be no more than 1000m) at a distance and observe with computer.
The embodiment of the second technical scheme of the present utility model as shown in Figure 3 and Figure 4, the present embodiment is a kind of high-voltage switchgear vacuum circuit breaker, include solid sealed pole of vacuum arc-extinguishing chamber 1, on described solid sealed pole of vacuum arc-extinguishing chamber, be provided with conductive contact 6, above-mentioned conductive contact has two, is divided into conductive contact 61 and lower conductive contact 62 from top to bottom.
Wherein, above-mentioned high-voltage switchgear vacuum circuit breaker also includes device for detecting temperature, described device for detecting temperature comprises temperature sensor 8, be generally ring-type, be wrapped on described upper conductive contact 61 and lower conductive contact 62, thus can be firmly the above-mentioned conductive contacts of observing and controlling of fixed thereon and 360 degree, subsequently, this temperature sensor 8 can convert the variations in temperature of conductive contact to analog signal and send, what the analog signal here adopted is wireless signal, if adopt normal signal line of the prior art, that likely can be burnt out by the conductive contact of high temperature, and just no longer need holding wire to carry out transfer die analog signal after having adopted wireless signal, obtain optimization.
Above-mentioned device for detecting temperature also includes signal picker, the wireless signal producing for collecting temperature transducer, and this wireless signal is sent in signal processor, the design parameter of this temperature sensor is as follows: temperature measurement accuracy: ± 0.5 DEG C; Temperature measurement range :-50 ~ 150 DEG C; Supply power mode: CT power taking (10A≤electric current≤4000A), powered battery (>=5 years).
Aforesaid signal processor, be for receiving the wireless signal that signal picker transmits and processing, then result is sent in circuit breaker actuating mechanism to (installation site of circuit breaker actuating mechanism and operation principle can with reference to the embodiment of the utility model the first scheme) with the form of the signal of telecommunication.Above-mentioned signal picker and signal processor are also integrated in single-chip microcomputer.
Described high-voltage switchgear vacuum circuit breaker includes photoelectricity barrier box, photoelectricity barrier box has another name called photoisolator (optoelectronic isolator, english abbreviation is OC) also claim photoelectrical coupler, optical coupler, be called for short optocoupler, for eliminating the interference of extraneous noise to signal picker, signal processor.Also include remote-receiver, remote controller, remote controller operation instruction: 1, closing operation: first press B key 1 second, pressed D key in 5 seconds, can realize feed motion; 2, sub-switching operation: first press B key 1 second, pressed A key in 5 seconds, can realize separating brake action; 3, indicator light for to point, making process instruction.Remote control distance: >=50m; Ambient temperature :-25～+ 80 DEG C (normal temperature type) ,-40～+ 85 DEG C (wide temperature range type);
In sum, the technical scheme of the present embodiment is to have adopted wireless temperature online detection system, adopt advanced in the world wireless sensor network technology, taking intelligent microprocessor as core, use accurate digital temperature sensor, thoroughly solved the temperature monitoring difficult problem under strong-electromagnetic field interference environment.Realize on-line monitoring and the repair based on condition of component of power equipment, for building digital intelligent electrical network, played an important role.
As shown in figures 1 and 3, no matter be in the first technical scheme of the present utility model and the second technical scheme, described circuit breaker frame 4 belows are provided with electric chassis truck 7, and described circuit breaker frame 4 is fixed on described electric chassis truck 7, and can move with described electric chassis truck 7.And normally hand pulling type of chassis vehicle of the prior art, owing to being manual operation, workload is large, and mechanism's catching phenomenon is processed arbitrarily.And after having adopted electric chassis truck; can realize the control and protection of handcart; have on the spot and two kinds, distant place operator scheme; controller can electric handcart drive motors running be obstructed (as not in place or mechanism blockage is installed) while reaching protective condition immediately to motor braking; reverse drive motors is removed the stuck state of handcart, avoids the damage of mechanism.Have perfect
state-indicating functionwith interlocking recognition function, easy to use and reliable, be really to realize intelligentized product.
As shown in Figure 5, be the embodiment of the third technical scheme of the present utility model.The present embodiment is a kind of high-voltage switchgear vacuum circuit breaker, include solid sealed pole of vacuum arc-extinguishing chamber, on described solid sealed pole of vacuum arc-extinguishing chamber, be provided with conductive contact, in described solid sealed pole of vacuum arc-extinguishing chamber, be provided with vacuum interrupter, wherein, also include vacuum degree monitoring device, described vacuum degree monitoring device includes vacuum sensor, be arranged in described vacuum interrupter, for converting the vacuum-pressure signal of vacuum interrupter to analog signal; First signal collector, the analog signal producing for gathering vacuum transducer, and analog signal is sent to signal processor; First signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result; Also include device for detecting temperature, described device for detecting temperature comprises temperature sensor, is arranged on described conductive contact, for converting the variations in temperature of conductive contact to analog signal; Secondary signal collector, the analog signal producing for collecting temperature transducer, and analog signal is sent to signal processor; Secondary signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result.
Can find out, the third technical scheme of the present utility model is in fact comprehensive to the utility model the first technical scheme and the second technical scheme.In above-mentioned three kinds of schemes, any scheme could add long-range remote control function simultaneously! Realize intellectualized operation.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a high-voltage switchgear vacuum circuit breaker, includes solid sealed pole of vacuum arc-extinguishing chamber, in described solid sealed pole of vacuum arc-extinguishing chamber, is provided with vacuum interrupter, it is characterized in that: also include vacuum degree monitoring device, described vacuum degree monitoring device includes
Vacuum sensor, is arranged in described vacuum interrupter, for converting the vacuum-pressure signal of vacuum interrupter to analog signal;
Signal picker, the analog signal producing for gathering vacuum sensor, and analog signal is sent to signal processor;
Signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result.
2. high-voltage switchgear vacuum circuit breaker according to claim 1, it is characterized in that: described vacuum degree monitoring device also includes breaker mechanism, with described signal processor coupling, in the time receiving the abnormal signal of signal processor transmission, can cut off the main circuit of whole high-voltage switchgear vacuum circuit breaker.
3. high-voltage switchgear vacuum circuit breaker according to claim 1, is characterized in that:
Also include circuit breaker frame, be provided with controller on described circuit breaker frame side, in described controller, single-chip microcomputer is installed, described signal picker and signal processor are integrated in this single-chip microcomputer.
4. high-voltage switchgear vacuum circuit breaker according to claim 3, is characterized in that: in described circuit breaker frame, controller has display screen, and described display screen and the coupling of described single-chip microcomputer, for display result on screen.
5. high-voltage switchgear vacuum circuit breaker according to claim 4, is characterized in that: described analog signal is to pass through infrared transmission.
6. a high-voltage switchgear vacuum circuit breaker, includes solid sealed pole of vacuum arc-extinguishing chamber, on described solid sealed pole of vacuum arc-extinguishing chamber, is provided with conductive contact, it is characterized in that: also include device for detecting temperature, described device for detecting temperature comprises
Temperature sensor, is arranged on described conductive contact, for converting the variations in temperature of conductive contact to analog signal;
Signal picker, the analog signal producing for collecting temperature transducer, and analog signal is sent to signal processor;
Signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result.
7. high-voltage switchgear vacuum circuit breaker according to claim 6, is characterized in that: also include photoelectricity barrier box, disturb for preventing that extraneous noise from receiving to produce to the signal of signal picker, signal processor.
8. high-voltage switchgear vacuum circuit breaker according to claim 6, is characterized in that: described temperature sensor is wrapped on described conductive contact.
9. according to the high-voltage switchgear vacuum circuit breaker described in claim 1 or 6, it is characterized in that: also include circuit breaker frame and by electric chassis truck, described circuit breaker frame is fixed on electric chassis truck, and can move with described electric chassis truck.
10. a high-voltage switchgear vacuum circuit breaker, include solid sealed pole of vacuum arc-extinguishing chamber, on described solid sealed pole of vacuum arc-extinguishing chamber, be provided with conductive contact, in described solid sealed pole of vacuum arc-extinguishing chamber, be provided with vacuum interrupter, it is characterized in that: also include vacuum degree monitoring device, described vacuum degree monitoring device includes
Vacuum transducer, is arranged in described vacuum interrupter, for converting the vacuum-pressure signal of vacuum interrupter to analog signal;
First signal collector, the analog signal producing for gathering vacuum transducer, and analog signal is sent to signal processor;
First signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result;
Also include device for detecting temperature, described device for detecting temperature comprises
Temperature sensor, is arranged on described conductive contact, for converting the variations in temperature of conductive contact to analog signal;
Secondary signal collector, the analog signal producing for collecting temperature transducer, and analog signal is sent to signal processor;
Secondary signal processor, for receiving the analog signal of signal picker transmission and processing, then converts the analog signal receiving to normal signal or abnormal signal according to result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394910.8U CN203931931U (en) | 2014-07-17 | 2014-07-17 | A kind of high-voltage switchgear vacuum circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394910.8U CN203931931U (en) | 2014-07-17 | 2014-07-17 | A kind of high-voltage switchgear vacuum circuit breaker |
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| Publication Number | Publication Date |
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| CN203931931U true CN203931931U (en) | 2014-11-05 |
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ID=51827702
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| CN201420394910.8U Expired - Fee Related CN203931931U (en) | 2014-07-17 | 2014-07-17 | A kind of high-voltage switchgear vacuum circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091720A (en) * | 2014-07-17 | 2014-10-08 | 江苏华通电气科技有限公司 | Vacuum circuit breaker of high-tension switch cabinet |
-
2014
- 2014-07-17 CN CN201420394910.8U patent/CN203931931U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091720A (en) * | 2014-07-17 | 2014-10-08 | 江苏华通电气科技有限公司 | Vacuum circuit breaker of high-tension switch cabinet |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20170717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |