CN204905041U - Novel explosion -proof power capacitor - Google Patents
Novel explosion -proof power capacitor Download PDFInfo
- Publication number
- CN204905041U CN204905041U CN201520671205.2U CN201520671205U CN204905041U CN 204905041 U CN204905041 U CN 204905041U CN 201520671205 U CN201520671205 U CN 201520671205U CN 204905041 U CN204905041 U CN 204905041U
- Authority
- CN
- China
- Prior art keywords
- sheet metal
- insulation board
- protuberance
- explosion
- burst disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The utility model relates to a novel explosion -proof power capacitor belongs to the power capacitor field, including apron, shell and book core, roll up core central authorities and be provided with hollow plug, be provided with first explosion -proof piece between apron and the book core, first explosion -proof piece is including first insulation board, first sheetmetal and second insulation board, the below of first explosion -proof piece is provided with the explosion -proof piece of the second the same with first explosion -proof chip architecture, explosion -proof piece of second and first explosion -proof piece mutually perpendicular, the inside explosion -proof piece of third that is provided with of hollow plug, the explosion -proof piece of third is including third insulation board, second sheetmetal and fourth insulation board. This power capacitor simple structure, simple to operate, the usage is extensive, and explosion -proof action is sensitive, when condenser expansion deformation, no matter which kind of deformation shell or apron produce, first explosion -proof piece or the explosion -proof piece of second or the disconnection in time of the explosion -proof piece of third, and explosion -proof effectual, the practicality is strong, effectively guarantees power capacitor's quality.
Description
Technical field
The utility model relates to a kind of power capacitor, particularly relates to new type explosion proof power capacitor.
Background technology
Power capacitor, for the capacitor of electric power system and electrical equipment.Any two pieces of metallic conductors, centre dielectric separates, and namely forms a capacitor.The size of condenser capacitance, is decided by the characteristic of dielectric between its physical dimension and two-plate.Power capacitor can be divided into 8 kinds by purposes: 1. phase shifting capacitor, is mainly used in the reactive power of compensates electric system inductive load, to improve power factor, improves quality of voltage, reduces line loss.2. series capacitor, is series at that power frequency high voltage is defeated, in distribution line, in order to the distribution induction reactance of compensated line, improves quiet, the dynamic stability of system, improve the quality of voltage of circuit, lengthen power transmission Distance geometry and increase conveying capacity.3. coupling capacitor, is mainly used in the HF communication of high-voltage electric power circuit, measurement, control, protection and is used as parts in the device extracting electric energy.4. circuit-breaker capacitor, former title equalizing capacitor.Be connected in parallel on extra high voltage circuit breaker fracture and play all pressure effects, make the voltage between each fracture even in breaking course and when disconnecting, and the arc quenching characteristic of circuit breaker can be improved, improve breaking capacity.5. capacitor for electric induction heating system is in the electroheat equipment system of 40 ~ 24000 hertz for frequency, to improve power factor, improves the characteristic such as voltage or frequency in loop.6. pulse capacitor, mainly plays energy storage effect, as the basic energy storage unit such as impulse voltage generator, impulse current generator, circuit-breaker testing oscillation circuit.7. direct current and filtering capacitor, in high-tension d.c. plant and high-voltage rectifying filter.8. standard capacitor, in power frequency high voltage measuring media loss loop, is perhaps used as standard electric the capacitance partial pressure device measuring high pressure.
Because power capacitor puts into operation more and more, but mismanagement and other technical reasons, power capacitor is often caused to damage so that blast, capacitor explodes is capacitor internal component breakdown mainly, dissociate because inside produces corona, disruptive discharge and inside, capacitor is under superpotential effect, the initial free voltage of element is made to be reduced to below working field strength, cause physics, chemistry, electric effect thus, make insulation accelerated aging, decomposition, produce gas, form vicious circle, case pres-sure is increased, causes shell wall external drum so that blast.
The explosion-proof mainly sheet metal that installation can be torn on the shell of capacitor of existing power capacitor or wire serve as explosion-protection equipment, when capacitor internal component breakdown causes shell wall external drum to be out of shape, under the pulling of shell wall, sheet metal or wire are pulled off, capacitor circuit open circuit, prevent inner member from puncturing further, play explosion-proof.But because the shell of capacitor or the distortion of cover plate exist uncertain, when the deformation direction of shell and sheet metal or direction wiry contrary, or even time mutually vertical, the pulling force produced because of casing deformation is then difficult to sheet metal or wire to disconnect, and causes explosion-protection equipment malfunctioning; Especially, when cover plate deformable enclosure is indeformable, explosion-protection equipment lost efficacy, and there is potential safety hazard.
Utility model content
The deficiency that the utility model exists for prior art, provides new type explosion proof power capacitor, and concrete technical scheme is as follows:
New type explosion proof power capacitor, comprise cover plate, shell and core, core central authorities are provided with hollow core rod, the first burst disk is provided with between cover plate and core, first burst disk comprises the first insulation board, the first sheet metal and the second insulation board, the left end of the first sheet metal is provided with the first rivet, and the left end of the first sheet metal is fixedly connected with by the first rivet with between the first insulation board, and the first insulation board is fixedly connected with the inwall of shell; The right-hand member of the first sheet metal is provided with the second rivet, and the right-hand member of the first sheet metal is fixedly connected with by the second rivet with between the second insulation board, and the second insulation board is fixedly connected with the inwall of shell; The left end centre position of the first sheet metal is provided with semicircle first protuberance, and the first protuberance contacts with the first insulation board, and the right-hand member centre position of the first sheet metal is provided with semicircle second protuberance, and the second protuberance contacts with the second insulation board; The two ends up and down of the first sheet metal are respectively arranged with arc first groove, and the centre of the first groove is provided with triangle first breach, and the second insulation board is provided with circular hole, and circular hole is arranged on directly over hollow core rod; The below of the first burst disk is provided with second burst disk identical with the first burst disk structure, and the second burst disk is mutually vertical with the first burst disk; Described hollow core rod inside is provided with the 3rd burst disk, 3rd burst disk comprises the 3rd insulation board, the second sheet metal and the 4th insulation board, the lower end of the second sheet metal is provided with the 3rd rivet, the lower end of the second sheet metal is fixedly connected with by the 3rd rivet with between the 3rd insulation board, and the 3rd insulation board is fixedly connected with the bottom of shell; The upper end of the second sheet metal is provided with the 4th rivet, and the upper end of the second sheet metal is fixedly connected with by the 4th rivet with between the 4th insulation board, and the 4th insulation board is fixedly connected with the bottom of cover plate through circular hole, and the 4th is provided with gap between insulation board and circular hole; The centre position, lower end of the second sheet metal is provided with semicircle 3rd protuberance, and the 3rd protuberance contacts with the 3rd insulation board, and the centre position, upper end of the second sheet metal is provided with semicircle 4th protuberance, and the 4th protuberance contacts with the 4th insulation board; The two ends, left and right of the second sheet metal are respectively arranged with arc second groove, and the centre of the second groove is provided with triangular second gap.
As the improvement of technique scheme, the upper end of described core is provided with the upper fixed block of multiple L shape, the upper end of core is fixedly connected with by upper fixed block with between shell, and the lower end of core is provided with the lower fixed block of multiple L shape, and the lower end of core is fixedly connected with by lower fixed block with between shell.
As the improvement of technique scheme, described second burst disk is provided with the 5th protuberance, the 5th protuberance is provided with wire, one end of wire is connected with the 5th protuberance electrical equipment, and the other end of wire is connected with the first protuberance electrical equipment.
As the improvement of technique scheme, described first protuberance and the first sheet metal are integral type structure, and the second protuberance and the first sheet metal are integral type structure.
As the improvement of technique scheme, described 4th protuberance and the second sheet metal are integral type structure, and the 3rd protuberance and the second sheet metal are integral type structure.
New type explosion proof power capacitor structure described in utility model is simple, easy for installation, of many uses, is explosion-proofly active in one's movements; When capacitor dilatancy, no matter which kind of deformation shell or cover plate produce, and the first burst disk or the second burst disk or the 3rd burst disk can disconnect in time, and explosion-proof effect is good, practical, effectively ensures the quality of power capacitor.
Accompanying drawing explanation
Fig. 1 is new type explosion proof power capacitor structural representation one described in the utility model;
Fig. 2 is new type explosion proof power capacitor structural representation two described in the utility model;
Fig. 3 is the first burst disk structural representation described in the utility model;
Fig. 4 is the 3rd burst disk structural representation described in the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, Figure 2 and Figure 3, Fig. 1 is new type explosion proof power capacitor structural representation one described in the utility model, Fig. 2 is new type explosion proof power capacitor structural representation two, Fig. 3 described in the utility model is the first burst disk structural representation described in the utility model.Described new type explosion proof power capacitor, comprise cover plate 11, shell 12 and core 13, core 13 central authorities are provided with hollow core rod 131, the first burst disk 30 is provided with between described cover plate 11 and core 13, first burst disk 30 comprises the first insulation board 31, first sheet metal 32 and the second insulation board 35, the left end of the first sheet metal 32 is provided with the first rivet 36, the left end of the first sheet metal 32 is fixedly connected with by the first rivet 36 with between the first insulation board 31, and the first insulation board 31 is fixedly connected with the inwall of shell 12; The right-hand member that the right-hand member of the first sheet metal 32 is provided with the second rivet 39, first sheet metal 32 is fixedly connected with by the second rivet 39 with between the second insulation board 35, and the second insulation board 35 is fixedly connected with the inwall of shell 12; The left end centre position of the first sheet metal 32 is provided with semicircle first protuberance 37, first protuberance 37 and contacts with the first insulation board 31, and the right-hand member centre position of the first sheet metal 32 is provided with semicircle second protuberance 34, second protuberance 34 and contacts with the second insulation board 35; Described first protuberance 37 and the first sheet metal 32 are integral type structure, and the second protuberance 34 and the first sheet metal 32 are integral type structure; Rear condenser connects employing soldering, and the first protuberance 37, second protuberance 34 is pad, and because the first protuberance 37 contacts with the first insulation board 31, the second protuberance 34 contacts with the second insulation board 35, prevents the first sheet metal 32 from being pulled apart up and down.
The centre that the two ends up and down of the first sheet metal 32 are respectively arranged with arc first groove 33, first groove 33 is provided with triangle first breach 38; Under the effect of the first groove 33, the first sheet metal 32 presents streamlined, and the first sheet metal 32 middle part is thinner, easily be pulled off, and due to notch effect, the first breach 38 ensures that the first sheet metal 32 is easily pulled off under the effect of pulling force further, be active in one's movements, be swift in response.Second insulation board 35 is provided with circular hole 310, and circular hole 310 is arranged on directly over hollow core rod 131; It is mutually vertical with the first burst disk 30 that the below of the first burst disk 30 is provided with second burst disk 30 ', the second burst disk 30 ' identical with the first burst disk 30 structure.Because the first burst disk 30 is connected with the inwall of shell 12, when causing due to capacitor over-current, core 13 local is breakdown, core 13 punctures can produce a large amount of gas, and therefore capacitor expands distortion, if when the side of shell 12 deforms outwardly, produce lateral pull, under the effect of pulling force, the first sheet metal 32 is pulled off, capacitor generation open circuit, prevent core 13 from puncturing further, prevent blast from occurring.Second burst disk 30 ' is identical with the first burst disk 30 structure, explosion-proof performance is identical, under the effect of the second burst disk 30 ' and the first burst disk 30, when ensureing no matter the side of shell 12 deforms outwardly wherein, second burst disk 30 ' or the first burst disk 30 can disconnect by pulling force in time that produce because of evagination, capacitor generation open circuit, prevents blast from occurring.
As shown in Figure 4, Fig. 4 is the 3rd burst disk structural representation described in the utility model.Described hollow core rod 131 inside is provided with the 3rd burst disk 20,3rd burst disk 20 comprises the 3rd insulation board 21, second sheet metal 22 and the 4th insulation board 25, the lower end of the second sheet metal 22 is provided with the 3rd rivet 26, the lower end of the second sheet metal 22 is fixedly connected with by the 3rd rivet 26 with between the 3rd insulation board 21, and the 3rd insulation board 21 is fixedly connected with the bottom of shell 12; The upper end of the second sheet metal 22 is provided with the 4th rivet 29, the upper end of the second sheet metal 22 is fixedly connected with by the 4th rivet 29 with between the 4th insulation board 25,4th insulation board 25 is fixedly connected with the bottom of cover plate 11 through circular hole 310, is provided with gap between the 4th insulation board 25 and circular hole 310; Owing to being provided with gap between the 4th insulation board 25 and circular hole 310, prevent the first burst disk 30 or the second burst disk 30 ' because the stop of the 3rd burst disk 20 makes the first burst disk 30 or the second burst disk 30 ' cannot normally disconnect under the effect of pulling force, make capacitor can not open circuit in time, cause explosion accident to occur.The centre position, lower end of the second sheet metal 22 is provided with semicircle 3rd protuberance the 27, three protuberance 27 and contacts with the 3rd insulation board 21, and the centre position, upper end of the second sheet metal 22 is provided with semicircle 4th protuberance the 24, four protuberance 24 and contacts with the 4th insulation board 25; 4th protuberance 24 and the second sheet metal 22 are integral type structure, and the 3rd protuberance 27 and the second sheet metal 22 are integral type structure; Rear condenser connects employing soldering, and the 3rd protuberance 27, the 4th protuberance 24 are pad, and because the 3rd protuberance 27 contacts with the 3rd insulation board 21, the 4th protuberance 24 contacts with the 4th insulation board 25, prevent the second sheet metal 22 from being pulled apart up and down.The centre that the two ends, left and right of the second sheet metal 22 are respectively arranged with arc second groove 23, second groove 23 is provided with triangular second gap 28; Under the effect of the second groove 23, the second sheet metal 22 presents streamlined, and the second sheet metal 22 middle part is thinner, easily be pulled off, and due to notch effect, the second breach 28 ensures that the second sheet metal 22 is easily pulled off under the effect of pulling force further, be active in one's movements, be swift in response; Because the 3rd burst disk 20 is connected with the bottom of cover plate 11, shell 12 respectively, when causing due to capacitor over-current, core 13 local is breakdown, core 13 punctures can produce a large amount of gas, and therefore capacitor expands distortion, if when the bottom of cover plate 11 or shell 12 deforms outwardly, produce longitudinal pulling force, under the effect of pulling force, the second sheet metal 22 is pulled off, capacitor generation open circuit, prevent core 13 from puncturing further, prevent blast from producing.
For ensureing insulating properties between shell 12 and core 13 and preventing core 13 from use shaking; The upper end of described core 13 is provided with the upper fixed block 14 of multiple L shape, the upper end of core 13 is fixedly connected with by upper fixed block 14 with between shell 12, the lower end of core 13 is provided with the lower fixed block 15 of multiple L shape, and the lower end of core 13 is fixedly connected with by lower fixed block 15 with between shell 12.Under the effect of upper fixed block 14 and lower fixed block 15, ensure that core 13 is fixed on shell 12 inside center, fixed structure is simple, stable, cost is low.
When described new type explosion proof power capacitor is three termination capacitor, the first burst disk 30 is connected with first terminal electrical equipment, and the second burst disk 30 ' is connected with second terminal electrical equipment, and the 3rd burst disk 20 is connected with the 3rd terminal electrical equipment.When described new type explosion proof power capacitor is two-terminal capacitor, described second burst disk 30 ' is provided with the 5th protuberance 37 ', 5th protuberance 37 ' is provided with wire 40, and one end of wire 40 is connected with the 5th protuberance 37 ' electrical equipment, and the other end of wire 40 is connected with the first protuberance 37 electrical equipment; Wherein the first burst disk 30 is connected with first terminal electrical equipment, and the 3rd burst disk 20 is connected with second terminal electrical equipment.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. new type explosion proof power capacitor, comprise cover plate (11), shell (12) and core (13), core (13) central authorities are provided with hollow core rod (131), it is characterized in that: between described cover plate (11) and core (13), be provided with the first burst disk (30), first burst disk (30) comprises the first insulation board (31), first sheet metal (32) and the second insulation board (35), the left end of the first sheet metal (32) is provided with the first rivet (36), the left end of the first sheet metal (32) is fixedly connected with by the first rivet (36) with between the first insulation board (31), first insulation board (31) is fixedly connected with the inwall of shell (12), the right-hand member of the first sheet metal (32) is provided with the second rivet (39), and the right-hand member of the first sheet metal (32) is fixedly connected with by the second rivet (39) with between the second insulation board (35), and the second insulation board (35) is fixedly connected with the inwall of shell (12), the left end centre position of the first sheet metal (32) is provided with semicircle first protuberance (37), first protuberance (37) contacts with the first insulation board (31), the right-hand member centre position of the first sheet metal (32) is provided with semicircle second protuberance (34), and the second protuberance (34) contacts with the second insulation board (35), the two ends up and down of the first sheet metal (32) are respectively arranged with arc first groove (33), the centre of the first groove (33) is provided with triangle first breach (38), second insulation board (35) is provided with circular hole (310), circular hole (310) is arranged on directly over hollow core rod (131), the below of the first burst disk (30) is provided with second burst disk (30 ') identical with the first burst disk (30) structure, and the second burst disk (30 ') is mutually vertical with the first burst disk (30), described hollow core rod (131) inside is provided with the 3rd burst disk (20), 3rd burst disk (20) comprises the 3rd insulation board (21), the second sheet metal (22) and the 4th insulation board (25), the lower end of the second sheet metal (22) is provided with the 3rd rivet (26), the lower end of the second sheet metal (22) is fixedly connected with by the 3rd rivet (26) with between the 3rd insulation board (21), and the 3rd insulation board (21) is fixedly connected with the bottom of shell (12), the upper end of the second sheet metal (22) is provided with the 4th rivet (29), the upper end of the second sheet metal (22) is fixedly connected with by the 4th rivet (29) with between the 4th insulation board (25), 4th insulation board (25) is fixedly connected with through the bottom of circular hole (310) with cover plate (11), is provided with gap between the 4th insulation board (25) and circular hole (310), the centre position, lower end of the second sheet metal (22) is provided with semicircle 3rd protuberance (27), 3rd protuberance (27) contacts with the 3rd insulation board (21), the centre position, upper end of the second sheet metal (22) is provided with semicircle 4th protuberance (24), and the 4th protuberance (24) contacts with the 4th insulation board (25), the two ends, left and right of the second sheet metal (22) are respectively arranged with arc second groove (23), and the centre of the second groove (23) is provided with triangular second gap (28).
2. new type explosion proof power capacitor according to claim 1, it is characterized in that: the upper end of described core (13) is provided with the upper fixed block (14) of multiple L shape, the upper end of core (13) is fixedly connected with by upper fixed block (14) with between shell (12), the lower end of core (13) is provided with the lower fixed block (15) of multiple L shape, and the lower end of core (13) is fixedly connected with by lower fixed block (15) with between shell (12).
3. new type explosion proof power capacitor according to claim 1, it is characterized in that: described second burst disk (30 ') is provided with the 5th protuberance (37 '), 5th protuberance (37 ') is provided with wire (40), one end of wire (40) is connected with the 5th protuberance (37 ') electrical equipment, and the other end of wire (40) is connected with the first protuberance (37) electrical equipment.
4. new type explosion proof power capacitor according to claim 1, is characterized in that: described first protuberance (37) and the first sheet metal (32) are integral type structure, and the second protuberance (34) and the first sheet metal (32) are integral type structure.
5. new type explosion proof power capacitor according to claim 1, is characterized in that: described 4th protuberance (24) and the second sheet metal (22) are integral type structure, and the 3rd protuberance (27) and the second sheet metal (22) are integral type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520671205.2U CN204905041U (en) | 2015-09-01 | 2015-09-01 | Novel explosion -proof power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520671205.2U CN204905041U (en) | 2015-09-01 | 2015-09-01 | Novel explosion -proof power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204905041U true CN204905041U (en) | 2015-12-23 |
Family
ID=54927200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520671205.2U Expired - Fee Related CN204905041U (en) | 2015-09-01 | 2015-09-01 | Novel explosion -proof power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204905041U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706922A (en) * | 2019-09-28 | 2020-01-17 | 安徽旭峰电容器有限公司 | Circuit break protection device of low-voltage self-healing parallel capacitor |
| CN111009414A (en) * | 2019-12-27 | 2020-04-14 | 安徽航睿电子科技有限公司 | High-voltage split capacitor |
| CN111396613A (en) * | 2020-03-30 | 2020-07-10 | 中科前衍(深圳)工程科学发展有限公司 | Device for reducing thickness of high-pressure experiment cabin explosion-proof sheet |
-
2015
- 2015-09-01 CN CN201520671205.2U patent/CN204905041U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706922A (en) * | 2019-09-28 | 2020-01-17 | 安徽旭峰电容器有限公司 | Circuit break protection device of low-voltage self-healing parallel capacitor |
| CN111009414A (en) * | 2019-12-27 | 2020-04-14 | 安徽航睿电子科技有限公司 | High-voltage split capacitor |
| CN111009414B (en) * | 2019-12-27 | 2021-03-23 | 安徽航睿电子科技有限公司 | High-voltage split capacitor |
| CN111396613A (en) * | 2020-03-30 | 2020-07-10 | 中科前衍(深圳)工程科学发展有限公司 | Device for reducing thickness of high-pressure experiment cabin explosion-proof sheet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204905041U (en) | Novel explosion -proof power capacitor | |
| CN100508324C (en) | Middle frequency feedback surge protector | |
| CN203519768U (en) | Traveling-wave signal extraction equipment and system for single-phase earth fault | |
| CN104518506A (en) | Arc suppresser allowing distinguishing of intra-station arc grounding, extra-station grounding and motor stator arc grounding | |
| CN202614820U (en) | Capacitance voltage divider used in gas insulated switchgear (GIS) | |
| CN201298449Y (en) | Capacitance type potential transformer | |
| CN201868869U (en) | Combined type large-capacity self-separating overvoltage protector | |
| CN201060735Y (en) | Positive and negative 500kV DC current sensor | |
| CN103456491B (en) | Novel parallel capacitor for restraining switching surge of vacuum circuit breaker | |
| CN202616648U (en) | Metalclad withdraw switchgear anti-resonance voltage mutual inductor trolley | |
| CN201732672U (en) | Harmonic elimination type voltage transformer | |
| CN205141683U (en) | Shunt capacitance organizes integrated equipment | |
| CN102593813A (en) | Intelligent comprehensive resonance elimination device | |
| CN203660298U (en) | 220kV GIS line-outgoing structure | |
| CN202333335U (en) | Video socket | |
| CN201829854U (en) | Middle cabinet trolley of anti-resonance potential transformer | |
| CN204243750U (en) | Can distinguish in station and arc-extinction device that is outer and motor stator arc grounding of standing | |
| CN204741340U (en) | Power cable gets electric installation and cable elbow head | |
| CN201096819Y (en) | Two-purpose current conversion for electromagnetic electron | |
| CN216560840U (en) | Medium resistance type line selection structure for small current line selection device | |
| CN204304424U (en) | A kind of single-phase earthing superpotential transfer restraint device | |
| CN202167847U (en) | Ignition circuit system of gap type surge protector | |
| CN220139020U (en) | Generator control cabinet for preventing voltage transformer from being burnt out | |
| CN102611092B (en) | Mutation overvoltage impedance suppression device for electronic voltage transformer and application of device | |
| CN202977757U (en) | Terminal seat structure device with isolation protecting function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20170901 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |