CN204465007U - Transformer magnetizing current reactive power compensator - Google Patents
Transformer magnetizing current reactive power compensator Download PDFInfo
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- CN204465007U CN204465007U CN201520185642.3U CN201520185642U CN204465007U CN 204465007 U CN204465007 U CN 204465007U CN 201520185642 U CN201520185642 U CN 201520185642U CN 204465007 U CN204465007 U CN 204465007U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to transformer magnetizing current reactive power compensator, it is characterized in that this device comprises circuit breaker, switching capacitor contactor, fuse, capacitor and rotary switch, this five part constitutes the two large divisions of this device circuit and electrical primary part and electric secondary part; Described electrical primary part is: the upper interface of circuit breaker is directly connected on the upper interface of the total lock of low pressure, and the lower interface of circuit breaker connects the main contact of the upper interface of switching capacitor contactor, and the main contact of the lower interface of switching capacitor contactor connects capacitor; Described electric secondary part is: the upper interface of circuit breaker is connected with the upper interface of corresponding fuse, A phase is connected with the left side interface of rotary switch with the lower interface of the fuse of B phase, the lower interface of C phase fuse is connected with auxiliary contact of switching capacitor contactor, and two, the right side interface of rotary switch is linked back to another auxiliary contact of switching capacitor contactor simultaneously.
Description
Technical field
The utility model relates to the reactive power compensation of step down side, specifically relates to the reactive power compensation of transformer magnetizing current.
Background technology
At present, China's transformer low voltage reactive power compensation all compensates in load running, the i.e. reactive compensation cabinet of existing step down side, and when no-load transformer runs (the Intelligent Reactive Compensating Controller sampling current value of refering in particular to transformer originally low-pressure side is less than the no-load running under 50mA state) can not get corresponding compensation, namely there is no corresponding reactive compensation cabinet to carry out corresponding reactive power compensation.In fact, the operational mode of transformer has two kinds of modes: one is load running; Two is no-load running.Such as: the transformer being generally used for production, when night, workshop stops production, illumination is turned off the light, and transformer is at this moment in no-load running state, even if entrance guard or courtyard have several lighting bulbs, a large transformer is only with a miniature bulb, and load is too light, is also equivalent to be in Light Condition.When transformer is in no-load running, because the Intelligent Reactive Compensating Controller sampling current value of transformer script low-pressure side is less than 50mA, then in step down side reactive compensation cabinet originally, segmentation action is performed to the capacitor in cabinet, i.e. failure of consideration, which results in transformer when no-load running, reactive power compensation becomes blind area.Final result is exactly that massive quantity power supply and measurement user total power factor declines, to such an extent as to is punished, therefore the reactive power compensation of research transformer magnetizing current is necessary.
Utility model content
For the deficiencies in the prior art, technical problem to be solved in the utility model is: provide a kind of transformer magnetizing current reactive power compensator.This device is arranged on the upper interface of the total lock of low-pressure side of transformer, for the transformer of user when no-load running, reactive power compensation is carried out to the exciting current of transformer, the power factor of transformer primary side is improved, finally make the total power factor of transformer when zero load and load running improve, give the device of reactive power compensation.The utility model is intended to improve power factor when no-load transformer runs.
The present invention solves this technical problem adopted technical scheme: provide a kind of transformer magnetizing current reactive power compensator, it is characterized in that this device comprises circuit breaker, switching capacitor contactor, fuse, capacitor and rotary switch, this five part constitutes the two large divisions of this device circuit and electrical primary part and electric secondary part;
Described electrical primary part is: the upper interface of circuit breaker is directly connected on the upper interface of the total lock of low pressure, the lower interface of circuit breaker connects the main contact of the upper interface of switching capacitor contactor, the main contact of the lower interface of switching capacitor contactor connects capacitor, has connected and composed electrical primary partial circuit like this;
Described electric secondary part is: the upper interface of circuit breaker is connected with the upper interface of corresponding fuse, A phase is connected with the left side interface of rotary switch with the lower interface of the fuse of B phase, the lower interface of C phase fuse is connected with auxiliary contact of switching capacitor contactor, two, the right side interface of rotary switch is linked back to another auxiliary contact of switching capacitor contactor simultaneously, connects and composes electric secondary partial circuit like this.
The invention has the beneficial effects as follows: compared with prior art, this blind area when apparatus of the present invention are run for no-load transformer, at this device of the total lock of step down side parallel connection suitable for reading, be equivalent to the suitable for reading of the total lock of step down side and connect the capacitor of one piece of capacity suitable, original low voltage reactive compensation cabinet and this device is made to be in parallel connection, its then suitable for reading because of at the total lock of low-pressure side, therefore not by the control of low voltage reactive compensation cabinet, also not by the control of the total lock of low pressure, corresponding reactive power compensation is given when no-load transformer runs, improve the power factor of transformer primary side.At night, when transformer is in no-load running, low-pressure side Intelligent Reactive Compensating Controller detects that load current is less than 50mA, and the low voltage reactive compensation cabinet of step down side then quits work, and namely stops compensating.At this moment step down side just only the exciting current of remaining the utility model transformer magnetizing current compensation arrangement to transformer compensate, be equivalent to transformer magnetizing current reactive power compensator to the overcompensation of power transformation device low-pressure side, also capacitive load, the power factor of such transformer primary side is just improved, the total power factor of transformer when zero load and load running is obtained mention, both reached the power factor standard of massive quantity power supply and measurement user, and turn avoid transformer and drag down total power factor when no-load running and the phenomenon that enterprise is punished.The utility model is intended to carry out corresponding reactive power compensation to the exciting current of transformer under no-load running state, and this installation cost is low, and install simple, stability is high, successful, can widely use in transformer actual motion.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the utility model transformer magnetizing current reactive power compensator structural representation;
Fig. 2 is casing perspective view in the utility model transformer magnetizing current reactive power compensator;
Fig. 3 is circuit breaker 1 outline drawing in the utility model transformer magnetizing current reactive power compensator;
Fig. 4 is the outline drawing of switching capacitor contactor 2 in the utility model transformer magnetizing current reactive power compensator;
Fig. 5 is the outline drawing of fuse-holder 9 in the utility model transformer magnetizing current reactive power compensator;
Fig. 6 is the main TV structure schematic diagram of rotary switch 5 in the utility model transformer magnetizing current reactive power compensator;
Fig. 7 is capacitor 3 outline drawing in the utility model transformer magnetizing current reactive power compensator;
Fig. 8 is the utility model transformer magnetizing current reactive power compensator winding diagram;
In Fig. 1,1-circuit breaker, 2-switching capacitor contactor, 3-capacitor, 4-fuse, 5-rotary switch, 6-low voltage reactive compensation cabinet, the total lock of 7-low pressure, 8-transformer, 9-fuse-holder.
Embodiment
The utility model transformer magnetizing current reactive power compensator (is called for short device, see Fig. 1-8) comprise circuit breaker 1, switching capacitor contactor 2, fuse 4, capacitor 3 and rotary switch 5, this five part constitutes the two large divisions of this device circuit and electrical primary part and electric secondary part, electrical primary part comprises circuit breaker 1, switching capacitor contactor 2 and capacitor 3, and electric secondary part comprises fuse 4 and rotary switch 5; The quantity of described fuse 4 is three, and three fuses 4 are installed on fuse-holder 9;
Described electrical primary part is: the upper interface of circuit breaker 1 is directly connected on the upper interface of the total lock of low pressure, the lower interface of circuit breaker 1 connects the main contact of the upper interface of switching capacitor contactor 2, the main contact of the lower interface of switching capacitor contactor 2 connects capacitor 3, has connected and composed electrical primary partial circuit like this;
Described electric secondary part is: the upper interface of circuit breaker 1 is connected with the upper interface of corresponding fuse 4, A phase is connected with the left side interface of rotary switch 5 with the lower interface of the fuse 4 of B phase, the lower interface of C phase fuse is connected with auxiliary contact of switching capacitor contactor 2, two, the right side interface of rotary switch 5 is linked back to another auxiliary contact of switching capacitor contactor 2 simultaneously, connects and composes electric secondary partial circuit like this.
Of the present utility modelly be further characterized in that this device also comprises casing, described casing main body is rectangular structure, casing both sides have 10-20 radiating groove, box back surface upper end is provided with hangers, casing front is provided with the perforate matched with rotary switch 5 dimensions, and rotary switch 5 is fixedly mounted in this perforate; Bottom half is provided with feet, is provided with multiple crossbeam in casing, and circuit breaker 1, switching capacitor contactor 2, capacitor 3 and fuse 4 are arranged in the respective girders in casing from top to bottom successively.
The circuit breaker 1 involved by electrical primary part of the utility model device acts on as follows: one is control action, namely according to the operation needs of step down side, drops into transformer magnetizing current reactive power compensator, makes its parallel running in the low-pressure side of transformer; It is two for protective effect; when the power equipment namely in transformer magnetizing current reactive power compensator or line failure; by relaying protection and automatics, faulty component is excised rapidly from step down side, to ensure the normal operation of non-faulting part.
This capacitor 3 involved by device electrical primary part is capacitive compensation, a large inductance coil is equivalent to when no-load transformer runs, cause the power factor of transformer primary side very low, now couple capacitors its compensate, the power factor of transformer primary side can be improved.
The switching capacitor contactor 2 involved by electrical primary part of this device utilizes main contact to connect an electric second part, namely the top major joint of switching capacitor contactor is connected with circuit breaker, and the below main contact of switching capacitor contactor is connected with capacitor.Switching capacitor contactor utilizes auxiliary contact to connect electric secondary part, and namely auxiliary contact connect the electric secondary part that fuse and rotary switch form.
This fuse 4 involved by device electric secondary part is arranged in electric secondary partial circuit; fuse serves the effect of protective circuit safe operation equally; because having installed circuit breaker in electrical primary part; so be arranged on by fuse in electric secondary partial circuit, protect the safe operation of electric secondary circuit part.
This rotary switch 5 involved by device electric secondary part is the rotary switch of band lamp, and rotary switch is to connecting circuit, and the lamp above knob lights, and transformer magnetizing current reactive power compensator is started working.Rotary switch is to breaking circuit, and the lamp above knob goes out, and transformer magnetizing current compensation arrangement quits work.
Embodiment shown in Fig. 1 shows, the utility model transformer magnetizing current reactive power compensator comprises circuit breaker 1, switching capacitor contactor 2, three fuses 4, capacitor 3 and rotary switches 5, this five part constitutes the two large divisions of this device circuit and electrical primary part and electric secondary part, electrical primary part comprises circuit breaker, switching capacitor contactor and capacitor, and electric secondary part comprises fuse and rotary switch; Each phase of three-phase electricity is all connected with a fuse 4, three fuses and is fixed on fuse-holder 9.
10kV the high-pressure side of 0.4kV transformer 8 be connected with 10kV electrical network, low-pressure side is in parallel original low voltage reactive compensation cabinet 6 and the utility model transformer magnetizing current reactive power compensator simultaneously.Electrical primary part is: the upper interface of circuit breaker 1 is directly connected on the upper interface of the total lock of low pressure 7, namely with low voltage reactive compensation cabinet 6 parallel running; The lower interface of circuit breaker 1 connects the main contact of the upper interface of switching capacitor contactor 2, and the main contact of the lower interface of switching capacitor contactor 2 connects capacitor 3, has connected and composed electrical primary partial circuit like this.Electric secondary part is: the upper interface of the circuit breaker 1 respectively gone up mutually is connected with the upper interface of each fuse 4 gone up mutually, A phase is connected with left side the corresponding interface of rotary switch 5 with the lower interface of the corresponding fuse 4 of B phase, the lower interface of C phase fuse is connected with auxiliary contact of switching capacitor contactor 2, the interface of two interfaces on the right side of rotary switch 5 i.e. corresponding A, B phase but also be linked back to another auxiliary contact of switching capacitor contactor 2, connects and composes electric secondary partial circuit like this.
Embodiment shown in Fig. 2 shows, the casing of transformer magnetizing current reactive power compensator of the present invention, behind without plate, is saved material further, casing is directly installed on above the wall of transformer room.Casing main body is rectangular structure, and casing both sides have 15 radiating grooves, and box back surface upper end is provided with hangers, is gone up fixing for whole casing in position by hangers.Casing front is provided with the perforate matched with rotary switch 5 dimensions, and rotary switch 5 is fixedly mounted in this perforate, handled easily.Bottom half is provided with feet, as long as feet plays the object supporting whole device.Casing size of main body is 250 × 200 × 630mm, and the height of feet distance bottom half is 30mm.Casing is directly fixed on above a side walls of transformer room, saves space.Conveniently circuit breaker 1, switching capacitor contactor 2, fuse 4 and capacitor 3 are installed, in casing, are provided with multiple crossbeam.According to the relative position shown in Fig. 1, circuit breaker 1, switching capacitor contactor 2, capacitor 3 and fuse 4 are arranged on from top to bottom successively on the corresponding crossbeam in casing.
Embodiment illustrated in fig. 3ly show, circuit breaker 1 has 1-1#, 1-2#, 1-3#, 1-4#, 1-5# and 1-6# six interfaces.Wherein 1-1#, 1-3#, 1-5# are the upper interface of circuit breaker 1, and 1-2#, 1-4#, 1-6# are the lower interface of circuit breaker 1.
Embodiment illustrated in fig. 4ly to show, six main contacts of switching capacitor contactor 2 be 2-1 L1,2-3 L2,2-5 L3,2-2 T1,2-4 T2 and 2-6 T3, wherein 2-1 L1,2-3 L2,2-5 L3 be the main contact of interface on it, 2-2 T1,2-4 T2,2-6 T3 be the main contact of its lower interface, two auxiliary contact of switching capacitor contactor 2 are respectively 2-A1,2-A2.
Embodiment illustrated in fig. 5ly to show, fuse-holder 9 is fixed with three fuses 4, have 6 fuse interfaces, be respectively 4-1#, 4-2#, 4-3#, 4-4#, 4-5#, 4-6#, wherein 4-1#, 4-3#, 4-5# are the upper interface of fuse, and 4-2#, 4-4#, 4-6# are the lower interface of fuse.
Embodiment illustrated in fig. 6ly show, rotary switch 5 has 5-1#, 5-2#, 5-3#, 5-4# tetra-interfaces, and interface 5-1#, 5-2# are positioned at left side, and interface 5-3#, 5-4# are positioned at right side, and right side interface is all connected with the auxiliary contact 2-A2 of switching capacitor contactor 2.
Embodiment illustrated in fig. 7ly show, three terminals of capacitor 3 are respectively 3-1#, 3-2#, 3-3#.
Embodiment shown in Fig. 8 shows, the circuit interconnect pattern of the utility model transformer magnetizing current reactive power compensator.The electrical primary part line of transformer magnetizing current reactive power compensator: upper interface 1-1#, 1-3#, 1-5# of circuit breaker 1 respectively on lock total with low pressure the A phase of interface, B phase, C phase be connected; Lower interface 1-2#, 1-4#, 1-6# of circuit breaker 1 respectively with the main contact 2-5 of interface on switching capacitor contactor 2 L3,2-3 L2,2-1 L1 be connected; The main contact 2-6 of switching capacitor contactor 2 lower interface T3,2-4 T2,2-2 T1 be connected with three terminals 3-1#, 3-2#, 3-3# of capacitor 3 respectively.
The wiring of the electric secondary part of transformer magnetizing current reactive power compensator: upper interface 4-5#, 4-3#, 4-1# interface of the fuse 4 that upper interface 1-1#, 1-3#, 1-5# of circuit breaker 1 are corresponding with A, B, C is respectively connected; The lower interface 4-2# of C phase fuse 4 contacts 2 auxiliary contact 2-A1 with switch capacitor is connected; B phase is connected with left side interface 5-3# with 5-1# of rotary switch 5 respectively with corresponding lower interface 4-4# with 4-6# of A phase fuse 4; After on the right side of rotary switch 5, interface 5-2# and 5-4# is connected, right side interface 5-4# is connected with the auxiliary contact 2-A2 of switching capacitor contactor 2 again.So far, the wiring of transformer magnetizing current reactive power compensator of the present invention completes.
Embodiment 1
The present embodiment according to the mode of connection connecting breaker 1 described in Fig. 8, switching capacitor contactor 2, capacitor 3, fuse-holder 4, rotary switch 5.The electrical primary part line of transformer magnetizing current reactive power compensator: upper interface 1-1#, 1-3#, 1-5# of circuit breaker 1 respectively on lock total with low pressure the A phase of interface, B phase, C phase be connected; Lower interface 1-2#, 1-4#, 1-6# of circuit breaker 1 respectively with the main contact 2-5 of interface on switching capacitor contactor 2 L3,2-3 L2,2-1 L1 be connected; The main contact 2-6 of switching capacitor contactor 2 lower interface T3,2-4 T2,2-2 T1 be connected with three terminals 3-1#, 3-2#, 3-3# of capacitor 3 respectively.The wiring of the electric secondary part of transformer magnetizing current reactive power compensator: upper interface 4-5#, 4-3#, 4-1# interface of the fuse 4 that upper interface 1-1#, 1-3#, 1-5# of circuit breaker 1 are corresponding with A, B, C is respectively connected; The lower interface 4-2# of C phase fuse 4 contacts 2 auxiliary contact 2-A1 with switch capacitor is connected; B phase is connected with left side interface 5-3# with 5-1# of rotary switch 5 respectively with corresponding lower interface 4-4# with 4-6# of A phase fuse 4; After on the right side of rotary switch 5, interface 5-2# and 5-4# is connected, right side interface 5-4# is connected with the auxiliary contact 2-A2 of switching capacitor contactor 2 again.Then the transformer magnetizing current reactive power compensator connected is connected on the upper interface of the total lock of low pressure.Put into operation after this device and find, at night, when transformer is in no-load running, the original Intelligent Reactive Compensating Controller of step down side detects that load current is less than 50mA, then the low voltage reactive compensation cabinet of the existing low-pressure side of transformer then quits work, and namely stops compensating.At this moment step down side just only the exciting current of remaining transformer magnetizing current compensation arrangement of the present invention to transformer compensate, be equivalent to transformer magnetizing current reactive power compensator to the overcompensation of power transformation device low-pressure side, also capacitive load, the power factor of such transformer primary side is improved, the total power factor of transformer when load and no-load running being improved, avoiding the phenomenon that enterprise is punished because dragging down total power factor when no-load transformer runs.
Capacitor 3 in the utility model transformer magnetizing current compensation arrangement can change size according to the difference of transformer rated capacity.No-load current can be found above the nameplate of transformer
i in formula
10when referring to no-load transformer operation, the no-load current of transformer primary side; I
1Nrefer to the load current value of transformer primary side, the no-load current found is percentage, brings the formula that can be compensated capacity in following formula into:
Time as shown from the above formula for single-phase and three-phase transformer no-load running, on total sluice gate of low-pressure side and the condenser capacity connect is the product of the capacity of transformer and the percentage of no-load current, the most suitable, be
wherein Se is the rated capacity of transformer.At this moment on high-tension side power factor can be made close to 0.99.
Embodiment of the present utility model is: the rated capacity of transformer is Se=2000kVA, selects, be calculated as follows device in transformer magnetizing current reactive power compensator of the present invention;
No-load transformer electric current I
0%=0.42
Transformer rated capacity Se=2000kVA
Compensation capacity Qc
Optional equipment: the model of circuit breaker 1 be DZ47-63 3 D20
The model of switching capacitor contactor 2 is CJ19-25
The model of capacitor 3 is BSMJ-0.45-12-3
The model of fuse-holder 9 is RT18-32X 3 pole
The rated blowing-current of fuse 4 is 1A
The model of rotary switch 5 be LA38-11XD 2 (band lamps)
The device used in this transformer magnetizing current compensation arrangement all can bought on the market.Wherein according to the difference of transformer rated capacity, the size of capacitor 3 can be changed, switching capacitor contactor 2 is for being specifically designed to the use of the excision of low-pressure reactive compensation equipment and input shunt capacitor, just can as long as circuit breaker 1 is identical with rotary switch 5 assurance function, the selection of fuse 4 ensures that its rated blowing-current is 1A, if when selecting rated blowing-current excessive, unnecessary cost can be wasted.
By the utilization of this transformer magnetizing current compensation arrangement, make the power factor of transformer primary side bring up to 0.94 from 0.8, thus improve the total power factor of transformer when zero load and load running.Avoid the phenomenon that enterprise is punished because dragging down total power factor when no-load transformer runs, can find out that the utility model transformer magnetizing current compensation arrangement not only can improve the power factor (PF) of transformer primary side, can be that enterprise brings interests for enterprise saves unnecessary fine equally.
Claims (2)
1. a transformer magnetizing current reactive power compensator, it is characterized in that this device comprises circuit breaker, switching capacitor contactor, fuse, capacitor and rotary switch, this five part constitutes the two large divisions of this device circuit and electrical primary part and electric secondary part;
Described electrical primary part is: the upper interface of circuit breaker is directly connected on the upper interface of the total lock of low pressure, the lower interface of circuit breaker connects the main contact of the upper interface of switching capacitor contactor, the main contact of the lower interface of switching capacitor contactor connects capacitor, has connected and composed electrical primary partial circuit like this;
Described electric secondary part is: the upper interface of circuit breaker is connected with the upper interface of corresponding fuse, A phase is connected with the left side interface of rotary switch with the lower interface of the fuse of B phase, the lower interface of C phase fuse is connected with auxiliary contact of switching capacitor contactor, two, the right side interface of rotary switch is linked back to another auxiliary contact of switching capacitor contactor simultaneously, connects and composes electric secondary partial circuit like this.
2. transformer magnetizing current reactive power compensator according to claim 1, it is characterized in that this device also comprises casing, described casing main body is rectangular structure, casing both sides have 10-20 radiating groove, box back surface upper end is provided with hangers, casing front is provided with the perforate matched with rotary switch dimensions, and rotary switch is fixedly mounted in this perforate; Bottom half is provided with feet, is provided with multiple crossbeam in casing, and circuit breaker, switching capacitor contactor, capacitor and fuse are arranged in the respective girders in casing from top to bottom successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520185642.3U CN204465007U (en) | 2015-03-31 | 2015-03-31 | Transformer magnetizing current reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520185642.3U CN204465007U (en) | 2015-03-31 | 2015-03-31 | Transformer magnetizing current reactive power compensator |
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| Publication Number | Publication Date |
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| CN204465007U true CN204465007U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520185642.3U Expired - Fee Related CN204465007U (en) | 2015-03-31 | 2015-03-31 | Transformer magnetizing current reactive power compensator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148949A (en) * | 2019-05-08 | 2019-08-20 | 浙江芯能光伏科技股份有限公司 | Roof photovoltaic power station string type inverter night idle inhibition control device |
| CN110544942A (en) * | 2019-09-06 | 2019-12-06 | 西安交通大学 | reactive compensation type capacitor voltage-reducing electricity-taking device and working method |
-
2015
- 2015-03-31 CN CN201520185642.3U patent/CN204465007U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148949A (en) * | 2019-05-08 | 2019-08-20 | 浙江芯能光伏科技股份有限公司 | Roof photovoltaic power station string type inverter night idle inhibition control device |
| CN110544942A (en) * | 2019-09-06 | 2019-12-06 | 西安交通大学 | reactive compensation type capacitor voltage-reducing electricity-taking device and working method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160331 |