CN204792580U - Earthing switch with lightning arrester combination - Google Patents
Earthing switch with lightning arrester combination Download PDFInfo
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- CN204792580U CN204792580U CN201520357206.XU CN201520357206U CN204792580U CN 204792580 U CN204792580 U CN 204792580U CN 201520357206 U CN201520357206 U CN 201520357206U CN 204792580 U CN204792580 U CN 204792580U
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- lightning arrester
- main shaft
- earthed switch
- right angle
- lightning
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Abstract
The utility model belongs to the technical field of the switch. The utility model discloses an earthing switch with lightning arrester combination. Close down control mechanism including earthing switch main part, zinc oxide arrester, electric operating mechanism, motor. Electric operating mechanism includes motor and bevel gear drive mechanism. The utility model has the advantages of simple and compact structure, rationally, application method is simple, is fit for high current strength and uses down, and whole running behaviour is good, especially the combination with lightning arrester possessed the function of earthing switch with lightning arrester simultaneously. Earthing switch is the during operation under operating voltage, need bear extra fixed lightning impulse voltage, and under this extra fixed voltage's impact, the earthing switch body can not discharge and ground connection. So, to invade or voltage when increasing when extra thunder and lightning, the effect of arrester is switched on and the disruptive discharge by insulating becoming exactly, lightning current that will be certain or cross voltage injection to the earth for earthing switch is not strikeed by extra fixed voltage, the fine safety of protecting relevant equipment.
Description
Technical field
The utility model belongs to switching technique field, particularly relates to appliance switch technology, specifically a kind of earthed switch for electrical switchgear.
Background technology
Earthed switch is a kind of for a kind of mechanical device by equipment or line-to-ground, in exception conditions, during as short circuit, carries the abnormal current of regulation at the appointed time, in order to when equipment or line maintenance, ensures the safety of maintainer.Earthed switch is more common in the controller switching equipments such as High-low voltage switch cabinet, and mainly comprise fixed contact and movable touch knife, in both, one is connected with equipment, another one ground connection.For common switch cabinet, each three of the dynamic/static contact of earthed switch, three fixed contacts connect the end of incoming cables bus of switch cubicle respectively, and three movable touch knifes match one by one with fixed contact respectively, arrange ground connection by line.
Described fixed contact is fixed on base by insulator, and movable touch knife is assemblied on a main shaft, is coaxially fixedly equipped with connecting lever with movable touch knife, the movable end of connecting lever and movable touch knife stage clip (cylindrical compression spring of two ends door assembly with hinge and glass in right hand and left formula connector) connector hinged.The critical point of connecting lever and stage clip to be closed a floodgate and between gate-dividing state between movable touch knife.Under gate-dividing state, it is contrary with combined floodgate that stage clip acts on moment of torsion on main shaft, under this action torque coordinates with position-limit mechanism movable touch knife is maintained gate-dividing state.External force is applied to main shaft, to combined floodgate direction rotary main shaft, the energy storage of connecting lever compression press spring, when turning over the critical point of stage clip, stage clip acts on the torque conversion direction on main shaft, releases energy rapidly, and promotes connecting lever assistance combined floodgate external force drive movable touch knife rapid closing; Otherwise under "on" position, stage clip acts on the torque conversion direction on main shaft, under this action torque coordinates with position-limit mechanism movable touch knife is maintained "on" position.External force is applied to main shaft, it is made to rotate to separating brake direction, the energy storage of connecting lever compression press spring, when turning over the critical point of stage clip, the torque that stage clip acts on main shaft is changed direction again, stage clip promotes connecting lever and assists separating brake external force to drive movable touch knife to rotate to separating brake direction further, until limited means block, separating brake process completes.
The three grades of independent packing of described earthed switch, every pole mainly contains a few part composition such as CJ11 type motor-operating mechanism, action bars, insulator foot, post insulator, ground connection conducting loop sytem.The CJ11 motor drive mechanism actuating of every pole earthed switch.Three grades of earthed switches can carry out three-phase electric apparatus combined operation.The motion process of earthing is formed by two parts motion synthesis, i.e. folding movement and insertion motion.Folding movement has CJ11 type motor drive mechanism to drive action bars and active connecting lever to horizontally rotate, by a set of excessive levels double leval jib transmission on insulator foot, the rotational angle of mechanism is transformed into 120 degree by 180 degree, passive connecting lever on excessive connecting lever and earthing base forms a set of space four-links transmission, the vertical direction horizontal direction of excessive connecting lever being transformed into passive connecting lever is rotated, rotational angle is transformed into 90 degree by 120 degree, and under driving earthing, pipe does vertical rotary motion and carries out divide-shut brake.Action bars one end under earthing in pipe and earthing base hinged, one end is connected with tooth bar.Due to action bars from manage under base pin joint and earthing different with base pin joint position, manage under earthing in vertical rotary course, action bars axially moves relative to lower pipe, moving axially of such tooth bar just promotes gear rotation, thus pipe on the earthing that is connected with gear is stretched or folding movement relative to pipe under earthing, thus complete separating brake or the feed motion of earthing.In addition, while action bars axial displacement, balancing spring is by predetermined requirement energy storage or release energy, balances the gravitational moment of ground connection knife bar to greatest extent, is beneficial to the motion of ground connection knife bar.In the process that to insert motion be ground connection knife bar is moved to closing position by open position, when close to closing position, moving contact can be inserted into fixed contact inside gradually along the horn cover inwall of fixed contact.Because moving contact is bar type structure, fixed contact fingertip is plum-shaped structure, and moving contact can slowly spreading plum-shaped structure fingertip, inserts fingertip inside and has contacted combined floodgate completely with fingertip.
Described motor-operating mechanism, by the running of the rotation driven gear of two-stage gear, the main shaft of earthed switch arranges an oilless bearing, then install an axle sleeve be above that driven wheel provides support.After driven wheel carries out the rotation of certain angle, the boss on the gear left side will produce with main shaft drives part and contact, thus drives the running of main shaft drives part, because main shaft drives part is directly connected to operation axis, when running occurs actuator, main shaft also can follow run-in synchronism.When running to a certain degree, earthed switch starts action, this is that the running speed of main shaft drives part is faster than the movement velocity of driven wheel, but, because drive boss to have enough spaces, so, just ensure that driven wheel and main shaft drives part are operationally independent of each other, and keep the self-movement of continuation.After receiving earthed switch actuating signal, driven wheel gets back to home position, to ensure when manual operation, main shaft drives part and driven wheel can not be made to influence each other, and makes whole mechanism be able to mutually running smoothly.
Described a kind of Medium Voltage Switchgear earthed switch and front lower door interlocking mechanism.It comprises ground switch rotating shaft, is provided with locking part on door inside door body framework, ground switch rotating shaft fixedly mounts an earthed switch axle sleeve, the groove location of locking part on the positive opposite house of the projection on earthed switch axle sleeve; Ground switch rotating shaft is provided with back-up ring on an earthed switch axle, on earthed switch axle, the below of back-up ring is hinged with an earthed switch dead bolt, earthed switch dead bolt upper end is provided with fastening end, the front of earthed switch dead bolt is provided with push-botton operation axle on a door, and on door, push-botton operation the tip of the axis is pressed over the lower end of earthed switch dead bolt.After adopting above-mentioned structure, achieve and work as grounding switch tripping, when circuit breaker is in service position, front Xiamen should be opened; Only have by after push-botton operation axle on Xiamen, earthed switch could close a floodgate, and after earthed switch closes a floodgate, front Xiamen just can be opened, and ensure that the safety of operating personnel, avoids the generation of peril.
At present, existing technology discloses multiple earthed switch, but these earthed switches have only played its effect as earthed switch, thunder and lightning is that sound in an atmosphere, optical, electrical physical phenomenon occur, it is one of grand and the most important meteor of nature, also be nowhere near so current earthed switch only plays itself effect, there is its weak point.Possess lightning function is obviously very important to the protection of household electrical appliances and circuit simultaneously.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, provides a kind of earthed switch of being combined with lightning arrester and method thereof.
The technical solution of the utility model is as follows:
A kind of earthed switch be combined with lightning arrester comprises cuboid after-frame, insulator, the first rigid frame with right angle, the second rigid frame with right angle, supporting bracket, contact plate, movable touch knife, support plate, connecting lever, plate washer, cam trigger, travel switch, the first articulated coupling head, spring assembly, the second articulated coupling head, connects wire, disc spring, fixed lever, anti-dynamic bolt, main shaft, axial triangular groove, window, long slab rib, pedestal, motor-operating mechanism and lightning arrester, fixed lever is through supporting bracket, disc spring and contact plate, check bolt is by supporting bracket, contact plate and pedestal are fixedly connected, the two ends of spring assembly are connected with the second articulated coupling head with the first articulated coupling head respectively, first rigid frame with right angle one end is fixed on insulator, the other end is connected with the second rigid frame with right angle flat head bolt, first rigid frame with right angle also have a block length rib of slab support, movable touch knife and support plate with bolts, cam trigger stirs travel switch makes connecting lever rotate, supporting bracket, contact plate, disc spring, fixed lever, anti-dynamic bolt and base combination become static contact head device, fixed by pedestal and the first rigid frame with right angle and the second rigid frame with right angle, lightning arrester one end is connected with insulator top by connecting wire, other end ground connection, insulator is fixed on cuboid after-frame, plate washer is used for fixing the first articulated coupling head, second articulated coupling head and main shaft, cam trigger is arranged on main shaft, motor-operating mechanism drives main shaft to rotate.
Described insulator top connects a lightning arrester by connecting wire, and lightning arrester low-pressure end ground connection, high-pressure side is connected with the bus of point of incoming cables.
Described travel switch is set on baffle plate; Described cam trigger is arranged on main shaft, and described cam trigger and main shaft are fixed and with main axis.
Described cam trigger main part is a disk-like structure, and axis of rotation is perpendicular to card, and one section of outer margin contour of disk-like structure is planar spiral structures.
The inner side of described contact plate is provided with a projection, the arcuate shape of outside for concaving; Described disc spring is opposite disc spring.
Described motor-operating mechanism comprises bevel gear wheel, the bevel pinion of two equal sizes, two hexagonal through holes, pinion stand, projection, snap ring and axle sleeves, pinion stand is provided with between two bevel pinions, driven bevel gear wheel is placed in the rear of pinion stand by the axle sleeve of inner hollow, the inwall eye of axle sleeve is axially arranged with projection, two bevel pinions and driven bevel gear wheel are in transmission connection, hexagonal through hole arranges on bevel pinion, and projection is arranged in axle sleeve, and snap ring prevents axle sleeve from moving axially.
When described earthed switch works and is subject to extra fixing high-voltage impact under operating voltage, earthed switch body can not discharge and ground connection, now, the effect that lightning arrester plays becomes conducting and disruptive discharge by insulation exactly, certain lightning current or overvoltage are incorporated into the earth, earthed switch is not impacted by extra fixed voltage
Use the utility model, this structure is an integral type.Simplicity of design is advanced, and structure is simple, compact, reasonable, and using method is simple, and use under being applicable to high current intensity, overall operation is functional, easy for installation.Have employed novel contact configurations, this fixed contact is novel in design, has guide effect when monolithic moving knife inserts, and bulge contact is reliable, and thrust all has.Motor-operating mechanism have employed oblique gear mechanism, and this mechanism is easy to use, handling safety, effectively avoids the generation of accident, also extends the useful life of equipment.Particularly go back lightning arrester connected in parallel device, make earthed switch possess lightning function simultaneously, when earthed switch works under operating voltage, also need to bear extra fixing lightning impulse voltage, under the impact of this extra fixed voltage, earthed switch body can not discharge and ground connection.So; when extra lightning ingress or voltage increase; the effect of lightning arrester becomes conducting and disruptive discharge by insulation exactly; certain lightning current or overvoltage are incorporated into the earth; earthed switch is not impacted by extra fixed voltage; prevent the operational failure causing earthed switch because of thunder and lightning reason, protect the safety of associated appliance and equipment very well, perfect existing earthed switch the function that lacks.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of earthed switch be combined with lightning arrester of the utility model;
Fig. 2 is wherein a pair dynamic/static contact schematic diagram (containing fixed mount) of a kind of earthed switch be combined with lightning arrester of the utility model;
Fig. 3 is the static contact structure schematic diagram of a kind of earthed switch be combined with lightning arrester of the utility model;
Fig. 4 is the oblique gear mechanism schematic diagram of a kind of earthed switch be combined with lightning arrester of the utility model;
Fig. 5 is the fixed contact pedestal structural representation of a kind of earthed switch be combined with lightning arrester of the utility model;
Fig. 6 is that the motor of a kind of earthed switch be combined with lightning arrester of the utility model closes down structural scheme of mechanism;
Fig. 7 is the lightning arrester schematic diagram of a kind of earthed switch be combined with arrester device of the utility model;
Fig. 8 is a kind of earthed switch principle schematic be combined with arrester device of the present utility model:
In figure, cuboid after-frame 1 and insulator 2, and first rigid frame with right angle 3, second rigid frame with right angle 4, supporting bracket 5, contact plate 6, movable touch knife 7, support plate 8, connecting lever 9, baffle plate 10, cam trigger 11, travel switch 12, articulated coupling head 13, spring assembly 14, articulated coupling head 15, connect wire 16, disc spring 17, fixed lever 18, anti-dynamic bolt 19, main shaft 20, supporting bracket 21, axial triangular groove 22, window 23, long slab rib 24 and pedestal 25, bevel gear wheel 26, bevel pinion 27, hexagonal through hole 28, pinion stand 29, projection 30, snap ring 31, axle sleeve 32 and zinc oxide arrester 33.
Embodiment
As Fig. 1, 2, shown in 4, a kind of earthed switch be combined with lightning arrester comprises cuboid after-frame 1, insulator 2, first rigid frame with right angle 3, second rigid frame with right angle 4, supporting bracket 5, contact plate 6, movable touch knife 7, support plate 8, connecting lever 9, baffle plate 10, cam trigger 11, travel switch 12, first articulated coupling head 13, spring assembly 14, second articulated coupling head 15, connect wire 16, disc spring 17, fixed lever 18, anti-dynamic bolt 19, main shaft 20, supporting bracket 21, axial triangular groove 22, window 23, long slab rib 24, pedestal 25, motor-operating mechanism and zinc oxide arrester 33, fixed lever 18 is through supporting bracket 5, disc spring 17 and contact plate 6, check bolt is by supporting bracket 5, contact plate 6 and pedestal 25 are fixedly connected, the two ends of spring assembly 14 are connected with the second articulated coupling head 15 with the first articulated coupling head 13 respectively, first rigid frame with right angle 3 one end is fixed on insulator 2, the other end is connected with flat head bolt with the second rigid frame with right angle 4, first rigid frame with right angle 3 also have a block length rib of slab 24 support, movable touch knife 7 is with bolts with support plate 8, cam trigger 11 stirs travel switch 12 makes connecting lever 9 rotate, supporting bracket 5, contact plate 6, disc spring 17, fixed lever 18, anti-dynamic bolt 19 and pedestal 25 are combined into static contact head device, fixed by pedestal 25 and the first rigid frame with right angle 3 and the second rigid frame with right angle 4, zinc oxide arrester 33 one end is connected with insulator top by connecting wire 16, other end ground connection, insulator 2 is fixed on cuboid after-frame 1, plate washer 10 is for fixing the first articulated coupling head 13, second articulated coupling head 15 and main shaft 20, cam trigger 11 is arranged on main shaft 20, motor-operating mechanism drives main shaft 20 to rotate.
Described insulator 2 top connects a zinc oxide arrester 33 by connecting wire 16, and lightning arrester low-pressure end ground connection, high-pressure side is connected with the bus of point of incoming cables.
Described travel switch 12 is set on baffle plate 10; Described cam trigger 11 is arranged on main shaft 20, and described cam trigger 11 and main shaft are fixed and with main axis.
Described cam trigger 11 main part is a disk-like structure, and axis of rotation is perpendicular to card, and one section of outer margin contour of disk-like structure is planar spiral structures.
The inner side of described contact plate 6 is provided with a projection, the arcuate shape of outside for concaving; Described disc spring 17 is opposite disc spring.
Described motor-operating mechanism comprises bevel pinion 27, two hexagonal through holes 28 of bevel gear wheel 26, two equal sizes, pinion stand 29, projection (30), snap ring 31 and axle sleeve 32,
Pinion stand 29 is provided with between two bevel pinions 27, driven bevel gear wheel 26 is placed in the rear of pinion stand 29 by the axle sleeve 32 of inner hollow, the inwall eye of axle sleeve is axially arranged with projection 30, two bevel pinions 27 are in transmission connection with driven bevel gear wheel 26, hexagonal through hole 28 arranges on bevel pinion 27, projection 30 is arranged in axle sleeve 32, and snap ring 31 prevents axle sleeve 32 from moving axially.
When described earthed switch works and is subject to extra fixing high-voltage impact under operating voltage, earthed switch body can not discharge and ground connection, now, the effect that zinc oxide arrester 33 plays becomes conducting and disruptive discharge by insulation exactly, certain lightning current or overvoltage are incorporated into the earth, earthed switch is not impacted by extra fixed voltage
As shown in Figure 3, static contact head device of the present utility model is made up of supporting bracket 5, contact plate 6, disc spring 17, fixed lever 18, check bolt 19 and pedestal 25.Movable touch knife 7 to be contacted with the contact plate 6 of static contact head device by the motion realization of connecting lever 9 and is grounded;
As shown in Figure 5, fixed contact pedestal structure of the present utility model is made up of the first rigid frame with right angle 3, second rigid frame with right angle 4 and long slab rib 24.One end of first rigid frame with right angle 3 and insulator 2 are fixed, and another stationary plane and the second rigid frame with right angle 4 and static contact head device are fixed;
As shown in Figure 6, motor pass of the present utility model stop mechanism is made up of cam trigger 11 and travel switch 12.Realize the fluctuation to travel switch 12 by the rotation of main shaft 20 rotating band moving cam trigger 11, the counter-rotation of main shaft 20 can recover again travel switch 12 to initial condition;
As shown in Figure 7, zinc oxide arrester 33 schematic diagram that simultaneously combines of the utility model;
As shown in Figure 8, be principle schematic of the present utility model;
A kind of mechanism of the earthed switch be combined with lightning arrester comprises the following steps:
1) only have when run into exceed extra fixed voltage and electric current time, earthed switch is reacted, thus protection maintainer.Action bars is inserted in hexagonal through hole 28, during contact of earth, twist operation bar, bevel pinion 27 drives bevel gear wheel 26 to rotate;
2) rotation of bevel gear wheel 26 drives the rotation of main shaft 20, and when rotating to combined floodgate direction, cam trigger 11 is stirred travel switch 12 and made the energy storage of connecting lever 9 rotary compression spring 14;
3) when turning over the critical point of spring 14, spring 14 pairs of main shafts 20 release energy promote connecting lever 9 assist main shaft 20 that movable touch knife 7 is closed a floodgate to static contact head device fast;
4) when separating brake, main shaft 20 overcomes main force's square and spring force, and drive connecting lever 9 to move along separating brake direction, make spring 14 by dead point, spring 14 energy storage terminates, and closes a floodgate in order to next time;
5), when running into bad weather, time under overvoltage effect simultaneously within the extra fixed voltage scope that earthed switch can bear, now earthed switch body can not ground connection and electric discharge, and lightning current can flow into the earth by zinc oxide arrester 33, protect equipment;
6) under normal circumstances, lightning arrester resistance is very large, and relative to off state, zinc oxide arrester 33 inside is nonconducting.
Claims (6)
1. the earthed switch be combined with lightning arrester, it is characterized in that comprising cuboid after-frame (1), insulator (2), first rigid frame with right angle (3), second rigid frame with right angle (4), supporting bracket (5), contact plate (6), movable touch knife (7), support plate (8), connecting lever (9), plate washer (10), cam trigger (11), travel switch (12), first articulated coupling head (13), spring assembly (14), second articulated coupling head (15), connect wire (16), disc spring (17), fixed lever (18), anti-dynamic bolt (19), main shaft (20), supporting bracket (21), axial triangular groove (22), window (23), long slab rib (24), pedestal (25), motor-operating mechanism and zinc oxide arrester (33), fixed lever (18) is through supporting bracket (5), disc spring (17) and contact plate (6), check bolt is by supporting bracket (5), contact plate (6) and pedestal (25) are fixedly connected, the two ends of spring assembly (14) are connected with the second articulated coupling head (15) with the first articulated coupling head (13) respectively, first rigid frame with right angle (3) one end is fixed on insulator (2), the other end is connected with flat head bolt with the second rigid frame with right angle (4), support at the upper block length rib of slab (24) in addition of the first rigid frame with right angle (3), movable touch knife (7) is with bolts with support plate (8), cam trigger (11) stirs travel switch (12) makes connecting lever (9) rotate, supporting bracket (5), contact plate (6), disc spring (17), fixed lever (18), anti-dynamic bolt (19) and pedestal (25) are combined into static contact head device, fixed by pedestal (25) and the first rigid frame with right angle (3) and the second rigid frame with right angle (4), zinc oxide arrester (33) one end is connected with insulator top by connecting wire (16), other end ground connection, insulator (2) is fixed on cuboid after-frame (1), baffle plate (10) is for fixing the first articulated coupling head (13), second articulated coupling head (15) and main shaft (20), cam trigger (11) is arranged on main shaft (20), motor-operating mechanism drives main shaft (20) to rotate.
2. a kind of earthed switch be combined with lightning arrester according to claim 1, it is characterized in that connecting a zinc oxide arrester (33) with described insulator (2) top by being connected wire (16), zinc oxide arrester low-pressure end ground connection, high-pressure side is connected with the bus of point of incoming cables.
3. a kind of earthed switch be combined with lightning arrester according to claim 1, is characterized in that described travel switch (12) is set on baffle plate (10); Described cam trigger (11) is arranged on main shaft (20), and described cam trigger (11) and main shaft are fixed and with main axis.
4. a kind of earthed switch be combined with lightning arrester according to claim 1, is characterized in that described cam trigger (11) main part is a disk-like structure, and axis of rotation is perpendicular to card, and one section of outer margin contour of disk-like structure is planar spiral structures.
5. a kind of earthed switch be combined with lightning arrester according to claim 1, is characterized in that the inner side of described contact plate (6) is provided with a projection, the arcuate shape of outside for concaving; Described disc spring (17) is opposite disc spring.
6. a kind of earthed switch be combined with lightning arrester according to claim 1, it is characterized in that described motor-operating mechanism comprises bevel gear wheel (26), the bevel pinion (27) of two equal sizes, two hexagonal through holes (28), pinion stand (29), projection (30), snap ring (31) and axle sleeve (32), pinion stand (29) is provided with between two bevel pinions (27), driven bevel gear wheel (26) is placed in the rear of pinion stand (29) by the axle sleeve (32) of inner hollow, the inwall eye of axle sleeve is axially arranged with projection (30), two bevel pinions (27) and driven bevel gear wheel (26) are in transmission connection, hexagonal through hole (28) arranges on bevel pinion (27), projection (30) is arranged in axle sleeve (32), snap ring (31) prevents axle sleeve (32) from moving axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357206.XU CN204792580U (en) | 2015-05-29 | 2015-05-29 | Earthing switch with lightning arrester combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357206.XU CN204792580U (en) | 2015-05-29 | 2015-05-29 | Earthing switch with lightning arrester combination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204792580U true CN204792580U (en) | 2015-11-18 |
Family
ID=54532579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520357206.XU Withdrawn - After Issue CN204792580U (en) | 2015-05-29 | 2015-05-29 | Earthing switch with lightning arrester combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204792580U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900442A (en) * | 2015-05-29 | 2015-09-09 | 江山市电器技术开发有限公司 | Lightning arrester-combined grounding switch and method thereof |
| CN107146733A (en) * | 2017-05-24 | 2017-09-08 | 句容市福润电气有限公司 | A kind of indoor hv earthing switch warned in place |
-
2015
- 2015-05-29 CN CN201520357206.XU patent/CN204792580U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900442A (en) * | 2015-05-29 | 2015-09-09 | 江山市电器技术开发有限公司 | Lightning arrester-combined grounding switch and method thereof |
| CN104900442B (en) * | 2015-05-29 | 2017-03-01 | 江山市电器技术开发有限公司 | A kind of earthed switch being combined with lightning arrester and its method |
| CN107146733A (en) * | 2017-05-24 | 2017-09-08 | 句容市福润电气有限公司 | A kind of indoor hv earthing switch warned in place |
| CN107146733B (en) * | 2017-05-24 | 2019-03-22 | 句容市福润电气有限公司 | A kind of indoor hv earthing switch warned in place |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151118 Effective date of abandoning: 20171114 |