CN204333613U - A kind of fuse unit of solid insulation ring main unit - Google Patents
A kind of fuse unit of solid insulation ring main unit Download PDFInfo
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- CN204333613U CN204333613U CN201420766180.XU CN201420766180U CN204333613U CN 204333613 U CN204333613 U CN 204333613U CN 201420766180 U CN201420766180 U CN 201420766180U CN 204333613 U CN204333613 U CN 204333613U
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Abstract
A fuse unit for solid insulation ring main unit, comprises fuse, drive system, striker mechanism, fuse unit body; One end of the tube connector of fuse unit body is connected with solid insulation ring main unit sleeve pipe; Fuse is arranged in the fuse unit of fuse unit body; Striker mechanism is arranged on the nozzle of fuse unit by strutting piece; The joint at fuse two ends is connected with fuse unit base, striker mechanism claw respectively; Blocking lever one end being fixed through springboard of striker mechanism; Ground connection copper rod in drive system puts in the ground connection cylinder of fuse unit body; When the electric current on fuse exceedes setting, fuse quick fuse, striker is made to beat on springboard, blocking lever contacts with the interlocking plectrum of on-load switch earthed switch integral operating mechanism simultaneously, on-load switch automatic brake separating, presses earthed switch switch knob, and earthed switch closes a floodgate, ground connection copper rod inserts in ground connection claw by drive system, completes the ground connection operation at the line two ends of fuse unit.
Description
Technical field
The utility model relates to the basic electrical component in H01 classification, particularly relates to the emergency protective device in H01H classification.
Background technology
There is ground connection and close problem, electric Field Optimization problem and capacity issue, described in specific as follows in the fuse unit in current solid insulation ring main unit:
Ground connection closes problem, and the fuse lower end ground connection in current solid insulation ring main unit realizes often through sheet metal overlapping mode or to the mode of ground connection cylinder applying insulating oil; And in these two kinds of methods, sheet metal overlapping mode, due to reasons such as technique are coarse, simple and crude, causes its ground connection poor performance, easily causes the human safety issues of operating personnel in operation; In addition, for by applying to the ground connection cylinder of fuse the mode that insulating oil ensures insulation level, once sealing goes wrong, or damaging appears in ground connection cylinder, insulating oil can produce the phenomenons such as leakage, and now the insulation level of fuse unit does not just reach safety value, can break down;
Capacity issue, volume is excessive, and the occasion stricter at assembling volume requirement can not be used.
Electric Field Optimization problem, due to electric Field Optimization not, run in there will be electric discharge phenomena;
Fuse is the protector of a kind of short circuit and overcurrent, and after it exceedes setting a period of time according to electric current, the heat self produced makes fuse melting, thus circuit is disconnected, and plays the protective effect to circuit and equipment.
Solid insulation ring main unit comprises pole body, on-load switch earthed switch integral operating mechanism, interlocking unit, drive system, line cable; Pole body is arranged solid loop-net cabinet outlet casing tube; Interlocking unit comprises latch lever, and latch lever is fixed on blocking lever plectrum;
As shown in Figure 1, drive system 2 comprises ground connection copper rod 21, ground connection blocking lever 24, transmission main shaft 25, spindle bearing 26 and self-lubricating composite shaft sleeve 27; The biography motion process of drive system 2: when pressing earthed switch switch knob, the clockwise action of ground connection main shaft, earthed switch closes a floodgate, and the connecting lever of ground connection main shaft drives ground connection blocking lever 24, make transmission main shaft 25 action clockwise, the connecting lever of transmission main shaft 25 drives the action of ground connection copper rod 21;
As shown in Figure 2, striker mechanism 3 comprises strutting piece 31, striker mechanism claw 32, springboard 33 and striker 34.
Utility model content
The purpose of this utility model is the fuse unit providing a kind of solid insulation ring main unit, solves the ground connection poor performance that the fuse unit in current solid insulation ring main unit exists, the problem that electric Field Optimization degree is low and volume is excessive.
For solving the problem, the utility model provides a kind of fuse unit of solid insulation ring main unit, comprises fuse, drive system, striker mechanism; Drive system comprises ground connection copper rod; Striker mechanism comprises striker mechanism claw and strutting piece; It is characterized in that,
Also comprise fuse unit body, fuse unit body comprises fuse unit, ground connection cylinder, Connection Block, tube connector, wire outlet seat, outlet casing tube, fuse unit base; Fuse unit is tubular structure, and ground connection cylinder is tubular structure, and Connection Block is cuboid, and tube connector is pipe, and wire outlet seat is cylinder, and its sidewall is " U " shape wall, and outlet casing tube has the truncated conical shape of screwed hole in being; Ground connection cylinder, Connection Block and wire outlet seat are all arranged on the surface of fuse unit; Tube connector is arranged on the end face of Connection Block; Outlet casing tube is arranged on wire outlet seat;
Fuse is arranged in the fuse unit of fuse unit body; Striker mechanism is fixed on the nozzle of fuse unit by strutting piece; The joint at fuse two ends is connected with fuse unit base, striker mechanism claw respectively; Ground connection copper rod in drive system puts in the ground connection cylinder of fuse unit body.
Fuse unit body also comprises epoxy resin; Fuse unit, ground connection cylinder, Connection Block, tube connector, wire outlet seat and outlet casing tube are built by epoxy resin and are formed;
Close on the outer wall of fuse unit tube port position, be provided with and be looped around the first boss on outer wall, the first boss and fuse unit are connected as a single entity; The outer wall of fuse unit is provided with the second boss, and the second boss is circular arc body; Second boss and fuse unit are connected as a single entity; Second boss and the first boss contour, and to be connected as a single entity.
Ground connection cylinder is outer wall is " U " shape wall, and inwall is the tubular structure of cylindrical wall; The inwall of ground connection cylinder establishes internal thread; Ground connection cylinder is fixed on the second boss, is connected in one with the second boss.
Fuse unit body also comprises fuse outlet collar, fuse inlet wire conductor and cable outlet conductor;
Fuse unit base is cast in the inner bottom part of fuse unit, and the inwall bottom fuse unit is exposed on its surface;
Fuse outlet collar is cambered inwards pipe in the middle part of a kind of tube wall; Fuse outlet collar is cast in the barrel of fuse unit, and the first boss on its position and fuse unit is corresponding; The inwall of fuse unit is exposed in the middle part of the tube wall of fuse outlet collar;
Fuse inlet wire conductor is coaxial with Connection Block; Fuse inlet wire conductor is built and is fixed in the middle part of tube connector, and is connected with fuse unit base by being cast in the intrinsic conductor of fuse unit;
Cable outlet conductor is coaxial with outlet casing tube, and cable outlet conductor is built and is embedded in outlet casing tube; Cable outlet conductor is connected with fuse outlet collar by being cast in the intrinsic conductor of fuse unit.
Fuse unit base is cylinder, arranges three internal thread screw holes on its surface, for connecting fuse joint;
Fuse inlet wire conductor is the copper bar with through hole;
Cable outlet conductor is the pipe that one end has internal thread interface.
Fuse unit body also comprises ground connection claw and earthing conductor; Ground connection claw is coaxial with ground connection cylinder; The base of ground connection claw base builds the bottom being fixed on ground connection cylinder; Earthing conductor is cast in fuse unit body; Connected by earthing conductor between ground connection claw base and fuse outlet collar.
Ground connection claw comprises claw and ground connection claw base; Claw symmetry point stands on grounding clamp pawl base, and claw and ground connection claw base are connected as a single entity.
Fuse unit base, fuse outlet collar, fuse inlet wire conductor, cable outlet conductor, ground connection claw and earthing conductor are cast in fuse unit body by epoxy resin; The outer surface spraying semiconductor of fuse unit body or conductor coatings, thickness is 0.15-0.3mm.
The fuse of fuse to be model be XRNT-12; Ground connection blocking lever in drive system, employing No. 45 steel are made through heat treatment, and grounding copper bar matter is brass H65.
In this fuse unit, due to application screw thread rotation withdrawing pattern technology, screw thread is formed at the inner surface of ground connection cylinder, improve insulating surface creepage distance, therefore ground connection cylinder does not need to add insulating oil to improve insulation property, thus just avoids the phenomenon causing producing insulating oil leakage because adopting insulating oil; Because tube connector one end of fuse unit need be connected with solid insulation ring main unit sleeve pipe by this, the rear plug of the other end is blocked, and ground connection copper rod is put into ground connection cylinder, just can start working, and therefore fuse unit is installed more convenient, quick.
Because each part of this fuse unit fuse unit body is all cast in together with epoxy resin, therefore its compact conformation, compact, weight is low, only needs a comparatively narrow space.
Body fuse unit body in this fuse unit and inserts design through simulation optimization, and during operation, Electric Field Distribution is even, and partial discharge quantity is less than 5pc, meets national relevant regulations, and fail safe reliability is high; Fuse unit body outer surface spraying semiconductor or conductor coatings, operating personnel can directly touch fuse unit surface.
In addition in fuse unit, this interlocking is reliable, ground connection is reliable, and be directly connected with ground connection main shaft by drive system and blocking lever, parts used are less, and reliability greatly improves; When fuse unit normally runs, need not insulating oil be applied, namely can ensure that electric insulation gap, electric insulation gap can reach 135mm; End cover can be applied in ground connection cylinder outer end, prevent foreign matter, dust, steam etc. from entering ground connection cylinder.
Below in conjunction with accompanying drawing to the utility model, the fuse unit namely on solid insulation looped network is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation being arranged on the drive system on solid insulation looped network in the utility model;
Fig. 2 is the structural representation of striker mechanism in the utility model;
Fig. 3 is the cutaway view being arranged on the fuse unit on solid insulation looped network in the utility model;
Fig. 4 is the stereogram of fuse unit body in the utility model;
Fig. 5 is the front view of fuse unit body in the utility model;
The A-A direction cutaway view that Fig. 6 is the body of fuse unit shown in Fig. 5;
Fig. 7 is the structural representation of fuse outlet collar in the utility model;
The B-B direction cutaway view that Fig. 8 is the body of fuse unit shown in Fig. 5;
Fig. 9 is the structural representation of ground connection claw in the utility model.
In figure, 1. fuse; 2. drive system; 21. ground connection copper rods; 22. first connecting levers; 23. second connecting levers; 24. ground connection blocking levers; 25. transmission main shafts; 26. spindle bearings; 27. self-lubricating composite shaft sleeves; 3. striker mechanism; 31. strutting pieces; 32. striker mechanism claws; 33. springboards; 34. strikers; 4. fuse unit body; 41. fuse units; 411. first boss; 412. second boss; 42. ground connection cylinders; 43. Connection Blocks; 44. tube connectors; 45. wire outlet seats; 46. outlet casing tubes; 47. epoxy resin; 48. by fuse unit base; 49. fuse outlet collars; 4A. fuse inlet wire conductor; 4B. cable outlet conductor; 4C. ground connection claw; 4C1. claw; 4C2. ground connection claw base; 4D. earthing conductor; 5. solid insulation ring main unit sleeve pipe; 6. plug after; 7.M16 trip bolt; 8. blocking lever; 81. blocking lever plectrums.
Embodiment
As shown in Figure 3, fuse unit comprises fuse 1, drive system 2, striker mechanism 3, fuse unit body 4; Be below the detailed description of each part of the present embodiment:
Fuse 1 selects model to be the fuse of XRNT-12.
Ground connection blocking lever 24 in drive system 2, employing No. 45 steel are made through heat treatment, and ground connection copper rod 25 material is brass H65.
As shown in Figure 4, shown in composition graphs 5, fuse unit body 4 be formed by fuse unit 41, ground connection cylinder 42, Connection Block 43, tube connector 44, wire outlet seat 45 and outlet casing tube 46 pass through body; Fuse unit 41 is tubular structure, this tubular structure is obtained after processing by cylindrical tube, cylindrical tube, after processing, on the outer wall closing on its tube port position, leaves one and is looped around boss on outer wall, i.e. the first boss 411, in addition, cylindrical tube through processing after, on its external wall, leaving the second boss 412, second boss 412 is circular arc body; Second boss 412 and the first boss 411 contour, and to be connected as a single entity; Ground connection cylinder 42 is tubular structure, and the outer wall of this tubular structure is " U " shape wall, and inwall is cylindrical wall, ground connection cylinder 42 and the second boss 412 wide; Adopt screw thread rotation withdrawing pattern technology to form screw thread at the inwall of ground connection cylinder 42, improve insulating surface creepage distance; Ground connection cylinder 42 and the second boss 412 are connected in one; Connection Block 43 is cuboid, is fixed on fuse unit 41 on the surface, is connected as a single entity with fuse unit 41; Tube connector 44 is pipe, is fixed on the end face of Connection Block 43, is connected as a single entity with Connection Block 43; The solid of wire outlet seat 45 to be sidewalls be " U " shape wall, is fixed on the first boss 411 according to the surface at " U " word mouth place, is connected as a single entity with the first boss 411; Outlet casing tube 46 has the truncated conical shape of M16 screwed hole in being;
As shown in Figure 6, fuse unit body 4 also comprises fuse unit base 48, fuse outlet collar 49, fuse inlet wire conductor 4A and cable outlet conductor 4B; Epoxy resin 47 is adopted to be cast in fuse unit body 4 by fuse unit base 48, fuse outlet collar 49, fuse inlet wire conductor 4A, cable outlet conductor 4B; Fuse unit base 48 is cylinder, three internal thread screw holes being set on its surface, for connecting fuse joint, thus playing the effect of fixing fuse 1, fuse unit base 48 is cast in the inner bottom part of fuse unit 41, and the inwall bottom fuse unit 41 is exposed on its surface; In conjunction with such as Fig. 7, fuse outlet collar 49 is 491 cambered inwards pipes in the middle part of a kind of tube wall; Fuse outlet collar 49 is cast in the barrel of fuse unit 41, and the first boss 411 on its position and fuse unit 41 is corresponding, to keep in the middle part of the tube wall of fuse outlet collar 49 inwall that 491 expose fuse unit 41 when building; Fuse inlet wire conductor 4A is the copper bar with φ 16 through hole, keep fuse inlet wire conductor 4A coaxial with Connection Block 43, fuse inlet wire conductor 4A is built and is fixed in the middle part of Connection Block 43, and be connected with fuse unit base 48 by the conductor be cast in fuse unit body 4; Cable outlet conductor 4B is the pipe that one end has internal thread interface, and keep cable outlet conductor 4B coaxial with outlet casing tube 46, built by cable outlet conductor 4B and be embedded in outlet casing tube 46, during use, cable outlet conductor 4B is used for external line cable; Cable outlet conductor 4B is connected with fuse outlet collar 49 by the conductor be cast in fuse unit body 4;
As shown in Figure 8, fuse unit body 4 also comprises ground connection claw 4C and earthing conductor 4D; Composition graphs 9, ground connection claw 4C by the pipe of only one end open through being processed to form, the not opening one end of this pipe is the base of ground connection claw 4C, in the middle part of this pipe, the internal diameter of inwall is greater than the internal diameter of openend inwall, at this circular tube open end, axis along this pipe is cut, and forms 4 symmetries and divides the claw 4C1 stood on grounding clamp pawl base 4C2; Keep ground connection claw 4C coaxial with ground connection cylinder 42, with epoxy resin 47, the base of ground connection claw 4C is built the bottom being fixed on ground connection cylinder 42; Be cast in earthing conductor 4D in fuse unit body 4 for connecting base and the fuse outlet collar 49 of ground connection claw 4C.
When fuse unit is used on solid loop-net cabinet, annexation is as follows:
Solid insulation ring main unit sleeve pipe 5 is inserted in by tube connector 44 one end of fuse unit body 4, and fixes with M16 trip bolt 7; The rear plug 6 of tube connector 44 other end is blocked; Fuse 1 is arranged in the fuse unit 41 of fuse unit body 4; Striker mechanism 3 is arranged on the nozzle of fuse unit 41 by strutting piece 31; The joint at fuse 1 two ends is connected with fuse unit base 48, striker mechanism claw 32 respectively; Blocking lever 8 one end is fixed by the springboard 33 of striker mechanism 3; The other end and the blocking lever plectrum 81 of blocking lever 8 are fixed; Ground connection copper rod 21 in drive system 2 puts in the ground connection cylinder 42 of fuse unit body 4; During use, the external line cable of cable outlet conductor 4B of fuse unit body 4.
The course of work of fuse unit in the present embodiment:
When the electric current on fuse 1 exceedes setting, fuse quick fuse; Wherein, striker mechanism 3 rushes open by the one end be connected with striker mechanism 3, and striker mechanism 3 is moved, and striker 34 clashes into springboard 33, and springboard 33 makes blocking lever 8 move, and blocking lever 8 contacts with the interlocking plectrum 81 of integral operating mechanism.On-load switch is made automatically to carry out sub-switching operation, then earthed switch switch knob is pressed with hand, start drive system 2, ground connection copper rod 21 is inserted in the ground connection claw 4C of fuse unit by machine driving by drive system 2 grounding switch main shaft, now earthed switch is also in closing position, this completes the ground connection operation at the line two ends of fuse unit, residual charge is discharged, ensures the personal safety of operating personnel.
In the present embodiment, each part of fuse unit body 4: fuse unit 41, ground connection cylinder 42, Connection Block 43, tube connector 44, wire outlet seat 45 and outlet casing tube 46 all adopt epoxy resin to build and form, and the outer surface of fuse unit body 4 spraying semiconductor or conductor coatings, thickness is about 0.15-0.3mm fuse unit body 4 and adopts epoxy resin 47, therefore through simulation optimization, fuse unit body 4 meets partial discharge quantity under 13.2 kilovoltages and is less than 5pc, power-frequency withstand voltage is the performance of 45Kv/min, and possesses following machinery and electric property:
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that the utility model claims determine.
Claims (10)
1. a fuse unit for solid insulation ring main unit, comprises fuse (1), drive system (2), striker mechanism (3); Drive system (2) comprises ground connection copper rod (21); Striker mechanism (3) comprises striker mechanism claw (31) and strutting piece (32); It is characterized in that,
Also comprise fuse unit body (4), fuse unit body (4) comprises fuse unit (41), ground connection cylinder (42), Connection Block (43), tube connector (44), wire outlet seat (45), outlet casing tube (46), fuse unit base (48); Fuse unit (41) is tubular structure, ground connection cylinder (42) is tubular structure, Connection Block (43) is cuboid, tube connector (44) is pipe, wire outlet seat (45) is cylinder, its sidewall is " U " shape wall, and outlet casing tube (46) has the truncated conical shape of screwed hole in being; Ground connection cylinder (42), Connection Block (43) and wire outlet seat (45) are all arranged on the surface of fuse unit (41); Tube connector (44) is arranged on the end face of Connection Block (43); Outlet casing tube (46) is arranged on wire outlet seat (45);
Fuse (1) is arranged in the fuse unit (41) of fuse unit body (4); Striker mechanism (3) is fixed on the nozzle of fuse unit (41) by strutting piece (31); The joint at fuse (1) two ends is connected with fuse unit base (48), striker mechanism claw (32) respectively; Ground connection copper rod (21) in drive system (2) puts in the ground connection cylinder (42) of fuse unit body (4).
2. the fuse unit of solid insulation ring main unit according to claim 1, is characterized in that, described fuse unit body (4) also comprises epoxy resin (47); Fuse unit (41), ground connection cylinder (42), Connection Block (43), tube connector (44), wire outlet seat (45) and outlet casing tube (46) are built by epoxy resin (47) and are formed.
3. the fuse unit of solid insulation ring main unit according to claim 2, it is characterized in that, the outer wall closing on fuse unit (41) tube port position is provided with and is looped around the first boss (411) on outer wall, and the first boss (411) and fuse unit (41) are connected as a single entity; The outer wall of fuse unit (41) is provided with the second boss (412), and the second boss (412) is circular arc body; Second boss (412) and fuse unit (41) are connected as a single entity; Second boss (412) and the first boss (411) contour, and to be connected as a single entity.
4. the fuse unit of solid insulation ring main unit according to claim 3, is characterized in that, ground connection cylinder (42) for outer wall be " U " shape wall, inwall is the tubular structure of cylindrical wall; The inwall of ground connection cylinder (42) establishes internal thread; Ground connection cylinder (42) is fixed on the second boss (412), is connected in one with the second boss (412).
5. the fuse unit of solid insulation ring main unit according to claim 2, it is characterized in that, fuse unit body (4) also comprises fuse outlet collar (49), fuse inlet wire conductor (4A) and cable outlet conductor (4B);
Fuse unit base (48) is cast in the inner bottom part of fuse unit (41), and the inwall of fuse unit (41) bottom is exposed on its surface;
Fuse outlet collar (49) is (491) cambered inwards pipe in the middle part of a kind of tube wall; Fuse outlet collar (49) is cast in the barrel of fuse unit (41), and the first boss (411) on its position and fuse unit (41) is corresponding; In the middle part of the tube wall of fuse outlet collar (49), (491) expose the inwall of fuse unit (41);
Fuse inlet wire conductor (4A) is coaxial with Connection Block (43); Fuse inlet wire conductor (4A) is built and is fixed on tube connector (44) middle part, and is connected with fuse unit base (48) by the conductor be cast in fuse unit body (4);
Cable outlet conductor (4B) is coaxial with outlet casing tube (46), and cable outlet conductor (4B) is built and is embedded in outlet casing tube (46); Cable outlet conductor (4B) is connected with fuse outlet collar (49) by the conductor be cast in fuse unit body (4).
6. the fuse unit of solid insulation ring main unit according to claim 5, is characterized in that,
Fuse unit base (48) is cylinder, arranges three internal thread screw holes on its surface, for connecting fuse joint;
Fuse inlet wire conductor (4A) is for having the copper bar of through hole;
Cable outlet conductor (4B) has the pipe of internal thread interface for one end.
7. the fuse unit of solid insulation ring main unit according to claim 5, is characterized in that, fuse unit body (4) also comprises ground connection claw (4C) and earthing conductor (4D); Ground connection claw (4C) is coaxial with ground connection cylinder (42); The base of ground connection claw base (4C2) builds the bottom being fixed on ground connection cylinder (42); Earthing conductor (4D) is cast in fuse unit body (4); Connected by earthing conductor (4D) between ground connection claw base (4C2) and fuse outlet collar (49).
8. the fuse unit of solid insulation ring main unit according to claim 7, is characterized in that, ground connection claw (4C) comprises claw (4C1) and ground connection claw base (4C2); Claw (4C1) symmetry point stands on grounding clamp pawl base (4C2), and claw (4C1) and ground connection claw base (4C2) are connected as a single entity.
9. the fuse unit of solid insulation ring main unit according to claim 8, it is characterized in that, fuse unit base (48), fuse outlet collar (49), fuse inlet wire conductor (4A), cable outlet conductor (4B), ground connection claw (4C) and earthing conductor (4D) are cast in fuse unit body (4) by epoxy resin (47); The outer surface spraying semiconductor of fuse unit body (4) or conductor coatings, thickness is 0.15-0.3mm.
10. the fuse unit of solid insulation ring main unit according to claim 1, is characterized in that, fuse (1) for model be the fuse of XRNT-12; The material of ground connection copper rod (25) is brass H65.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766180.XU CN204333613U (en) | 2014-12-05 | 2014-12-05 | A kind of fuse unit of solid insulation ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766180.XU CN204333613U (en) | 2014-12-05 | 2014-12-05 | A kind of fuse unit of solid insulation ring main unit |
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| Publication Number | Publication Date |
|---|---|
| CN204333613U true CN204333613U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420766180.XU Active CN204333613U (en) | 2014-12-05 | 2014-12-05 | A kind of fuse unit of solid insulation ring main unit |
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| Country | Link |
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| CN (1) | CN204333613U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960741A (en) * | 2017-04-05 | 2017-07-18 | 平高集团有限公司 | Fuse ground connection linkage and the switch cubicle using the device |
-
2014
- 2014-12-05 CN CN201420766180.XU patent/CN204333613U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960741A (en) * | 2017-04-05 | 2017-07-18 | 平高集团有限公司 | Fuse ground connection linkage and the switch cubicle using the device |
| CN106960741B (en) * | 2017-04-05 | 2019-04-12 | 平高集团有限公司 | Fuse ground connection linkage and the switchgear using the device |
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