CN105244795A - Single-phase module for load switch-fuse combination unit - Google Patents
Single-phase module for load switch-fuse combination unit Download PDFInfo
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- CN105244795A CN105244795A CN201510648230.3A CN201510648230A CN105244795A CN 105244795 A CN105244795 A CN 105244795A CN 201510648230 A CN201510648230 A CN 201510648230A CN 105244795 A CN105244795 A CN 105244795A
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- switch
- fuse
- insulation shell
- load switch
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Abstract
The invention discloses a single-phase module for a load switch-fuse combination unit. The single-phase module comprises an insulation shell; a load switch is mounted at the upper part of the insulation shell; a fuse is mounted in the middle of the insulation shell; an earthing switch is mounted at the lower part of the insulation shell; the load switch comprises a static contact and a moving contact; a load switch guide sleeve is arranged in the middle section of the moving contact; a grounding contact is arranged at the back part of the moving contact; a load switch operation mechanism is arranged at the back end of the upper part of the insulation shell; the back end of the fuse and the load switch guide sleeve are connected through a number one conductor; the front end of the fuse and the earthing switch are connected through a number two conductor; an impactor is arranged at the back end of the fuse; the impactor is connected with the load switch operation mechanism through an interlocking apparatus; and the earthing switch comprises an earthing switch guide sleeve, a number three conductor and an earthing switch operation mechanism. By adoption of the structure, the single-phase module is compact in structure and good in insulation property; and the switch modules are connected through the internal conductors, so that the single-phase module is reliable in connection, convenient to install, and the movement reliability is greatly improved.
Description
Technical field
The present invention relates to a kind of switch module, specifically a kind of switch-fuse combination single-phase module with high speed grounding switch, belongs to high-voltage switch gear technical field of electric equipment.
Background technology
The general capacity of electric network terminal user transformers in electric power system is little; self-protection ability is poor; depend on High-Voltage Electrical Appliances to protect it; High-Voltage Electrical Appliances protected mode mainly contains two kinds: one breaker protection, another kind of switch-fuse combination (abbreviation combined electrical apparatus).
A large amount of short circuit tests proves, when short trouble appears in oil-filled transformer inside, in 20ms internal cutting off fault, must can protect the safe and sound of transformer.From your device of open circuit, the full break-time of circuit breaker is made up of relay protection operate time, the intrinsic opening time of circuit breaker, arcing time three part, and three's sum is often greater than 60ms, and the protection of obvious circuit breaker to transformer does not prove effective.For combined electrical apparatus; current limiting fuse can fuse and excise short trouble in 10ms; meet action in 20ms completely; thus reach the needs of available protecting transformer; while wherein a phase first disconnects of fuse, the dropout plate of its striker installation on-load switch, on-load switch immediately three-phase disconnects simultaneously; prevent Transformer Phase-deficient Operation, reach the object of protection transformer.Due to switch-fuse combination dependable performance, cost comparatively circuit breaker is low, therefore the application in electrical network widely, the alternate main employing air insulation of fuse of early stage combined electrical apparatus unit, be connected by contact base, busbar with on-load switch, earthed switch, volume is large, takes up room large, cost is relatively high, and it is larger to be affected by the external environment.
Along with applying of solid insulation technology, fuse loads in insulating cylinder shaping in advance by solid loop-net cabinet manufacturing firm in recent years, then fuse unit is connected by special joint with on-load switch module or high speed grounding switch, decrease the impact of external environment, also decrease than original air insulation on volume simultaneously, but due to the intermodule of combined electrical apparatus unit be all connect by special joint, assemble more complicated, Reliability comparotive is poor, is not still very desirable.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of structure is simple, miniaturized, easy for installation, good insulating, reliable switch-fuse combination single-phase module.
In order to solve the problems of the technologies described above, switch-fuse combination single-phase module of the present invention, comprises insulation shell, and the top of insulation shell is provided with on-load switch, the middle part of insulation shell is provided with fuse, and the bottom of insulation shell is provided with earthed switch; On-load switch comprises the fixed contact that is embedded in front end, insulation shell top and can coordinate with fixed contact and the moving contact moved linearly, the stage casing of described moving contact is provided with the on-load switch guide pin bushing be embedded in insulation shell, the rear portion of moving contact has grounding contact, and the upper rear end of insulation shell is provided with load switch operation mechanism; Fuse is arranged in the fuse chamber in the middle part of insulation shell, the rear end of fuse is connected by the conductor being positioned at enclosure interior with between on-load switch guide pin bushing, the front end of described fuse is connected by No. two conductors being positioned at enclosure interior with between earthed switch, fuse rear end is provided with striker, and striker is connected with load switch operation mechanism by interlock; No. three conductors that earthed switch comprises the earthed switch guide pin bushing be embedded in insulation shell, one end is positioned at earthed switch guide pin bushing and be arranged on the earthing switch operating mechanism of lower front part of insulation shell.
Described moving contact is arranged on one and is filled with in the closed cavity of insulating gas, the front portion of described moving contact is provided with one can along with the insulation spout assembly that moving contact is movable in closed cavity, and described insulation spout assembly forms the arc extinguishing nozzle that has your effect of daraf(reciprocal of farad).
The rear end of described moving contact connects an insulated tension pole, and the rear end of described insulated tension pole extend in load switch operation mechanism.
The front end of described fuse is provided with front contact seat, and described front contact seat is connected with No. two conductors, and the rear end of described fuse is provided with rear contact base, and described rear contact base is connected with a conductor.
The opening part of described fuse chamber is provided with insulation end socket.
The front end of described earthed switch is provided with annular seal space, is filled with insulating gas in described annular seal space, is mounted with grounding contact and extend into No. four conductors in earthing switch operating mechanism in described annular seal space.
Conductive coating is coated with outside described insulation shell.
After adopting above-mentioned structure, the on-load switch fuse arranged due to bottom upper in insulation shell and earthed switch, three-stations load switch and load switch operation mechanism thereof is made to be positioned at the top of module, fuse assembly is positioned at the centre position of module, high speed grounding switch and operating mechanism thereof are then positioned at the bottom of module, it is phase structure between each switch module, the outer surface entirety of insulation shell is coated with conduction or semi-conducting grounded shield layer, its structural design is compact, good insulation preformance, connected by inner conductor between each switch module, connect reliable, easy for installation, simultaneously, make the positional precision of all parts high especially after installation, Reliability of Microprocessor is greatly improved.
Accompanying drawing explanation
Fig. 1 is the structural representation of switch-fuse combination single-phase module operating state of the present invention;
Fig. 2 is the structural representation of switch-fuse combination single-phase module inspecting state of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, switch-fuse combination single-phase module of the present invention is described in further detail.
As shown in the figure, switch-fuse combination single-phase module of the present invention, comprises the insulation shell that epoxide resin material is made, and the top of insulation shell is provided with on-load switch 1, the middle part of insulation shell is provided with fuse 6, and the bottom of insulation shell is provided with earthed switch 8; On-load switch 1 comprises the fixed contact 101 being embedded in front end, insulation shell top and the moving contact 104 that can coordinate the club shaped structure that also can move linearly with fixed contact, the stage casing of moving contact 104 be provided be embedded in insulation shell and with the on-load switch guide pin bushing 105 of moving contact conductive contact, the rear portion of moving contact 104 has grounding contact 106, insulation shell forms an enclosed cavity, grounding contact 106 is placed in enclosed cavity, and the upper rear end of insulation shell is provided with load switch operation mechanism 3; Fuse 6 is arranged in the fuse chamber 602 in the middle part of insulation shell, and the opening part of fuse chamber 602 is provided with insulation end socket 5; The rear end of fuse 6 is connected by the conductor 2 being positioned at enclosure interior with between on-load switch guide pin bushing 105, the front end of fuse 6 is connected by No. two conductors 9 being positioned at enclosure interior with between earthed switch 8, fuse 6 rear end is provided with striker 601, and striker 601 is connected with load switch operation mechanism 3 by interlock 4; No. three conductors 805 that earthed switch 8 comprises the earthed switch guide pin bushing 804 be embedded in insulation shell, one end is positioned at earthed switch guide pin bushing 804 and be arranged on the earthing switch operating mechanism 7 of lower front part of insulation shell.
Further, said moving contact 104 is arranged on one and is filled with in the closed cavity 103 of insulating gas, the front portion of moving contact 103 is provided with one can along with the insulation spout assembly 102 that moving contact is movable in closed cavity 103, insulation spout assembly 102 forms one and has the arc extinguishing nozzle drawing your effect of valve, three-stations load switch is made to be that linear pattern is arranged, preferably adopt sulfur hexafluoride gas or similar insulating gas arc extinguishing, use the version of gas self-expanding air blowing arc quenching principle and epoxy resins insulation, structure is simple, and arc extinction performance is good, the rear end of moving contact 104 connects an insulated tension pole 107, and the rear end of insulated tension pole 107 extend in load switch operation mechanism 3, the front end of said fuse 6 is provided with front contact seat 605, front contact seat 605 is connected with No. two conductors 9, the rear end of fuse 6 is provided with rear contact base 603, rear contact base 603 is connected with a conductor 2, the front end of said earthed switch 8 is provided with annular seal space 803, insulating gas is filled with in annular seal space 803, be mounted with grounding contact 802 in annular seal space 803 and extend into No. four conductors 801 in earthing switch operating mechanism 7, be coated with conductive coating 11(outside insulation shell to conduct electricity or semi-conducting grounded shield layer), what realize in product running is tangible, non-maintaining, security reliability is higher.
As shown in Figure 1, for the normal operating conditions of switch-fuse combination single-phase module of the present invention, namely three-stations load switch is in combined floodgate, high speed grounding switch is in an open position, now the fixed contact 101 of three-stations load switch 1 and moving contact 104 and on-load switch guide pin bushing 105 realize electrically conducting, on-load switch is made to be in closing position, then by a conductor, in fuse 6, the front contact seat 603 of fusion tube connects, the rear contact base 605 of fusion tube passes through the high speed grounding switch guide pin bushing 804 of No. two conductors and high speed grounding switch 8, No. four conductors 805 realize electrical connection, in engineering normal course of operation, switch-fuse combination single-phase module of the present invention should be in normal operating conditions, but when there is short circuit current in circuit, due to the manufacture permissible error of fuse, in the fuse 6 of the wherein phase in three-phase, first the fuse of fusion tube inside fuses, striker 601 ejects, impelled the trip gear action of 3 of load switch operation mechanism by the action of interlock 4, and then drive three-phase three-station on-load switch 1 quick acting switching-off action disengagement failure electric current simultaneously.By above operation, the switch-fuse combination single-phase module of band high speed grounding switch completes its protection to rear end transformer simple and reliablely.
After completing and cut-offfing short circuit current, three-phase fusion tube must be changed, must therefore make three-stations load switch 1 to earthing position by first on-load switch operation operating mechanism 3 before changing fusion tube, then during operational grounding switch operating mechanism 7, high speed grounding switch 8 arrives closed position, make the inspecting state (as shown in Figure 2) of switch-fuse combination single-phase module, the now grounding contact 106 of three-stations load switch 1, moving contact 104 and on-load switch guide pin bushing 105, and a conductor and front contact seat 603 form the front end earth fault protection circuit of fusion tube; Simultaneously the grounding contact 802 of high speed grounding switch 8, high speed grounding switch guide pin bushing 804 and No. three conductors and rear contact base 605 form the rear end earth fault protection circuit of fusion tube.Now in fuse 6, the front and back end of fusion tube completes ground protection all, therefore can be dismantled insulation end socket 5 by instrument, and then in fuse chamber, take out fusion tube change.
Obviously, after replacing fusion tube terminates, can high speed grounding switch 8 be made in an open position by first operational grounding switch operating mechanism 7, then operating operating mechanism 3 makes three-stations load switch 1 arrive first open position, and then to closing position (i.e. position shown in Fig. 1), for switch-fuse combination single-phase module puts into operation ready.
By structural design of the present invention, the phase insulation problem of conventional combination electrical equipment is changed into Insulation Problems relatively, Insulation Problems is more easily solved, three-stations load switch operating mechanism can make insulated tension pole have fast and two kinds of motion states at a slow speed, driving mechanism wherein can make insulated tension pole gun, the motor action of driving mechanism can make insulated tension pole rotational motion to linear motion at a slow speed, specifically three-stations load switch operating mechanism 3 makes moving contact 104 move along a straight line together with in insulating gas with insulation spout assembly 102 by driving insulated tension pole 7, by with fixed contact 101, the conjunction of on-load switch guide pin bushing 105 and grounding contact 106 divides the closing position that can form three-stations load switch 1, open position, earthing position, in fuse chamber 602, there is fusion tube, oiling semiconductive shielding layer on the inwall of fuse chamber 602, the partial discharge between fuse chamber 602 and fusion tube contact-making surface can be reduced by insulation screen, thus the electric field strength improved between fuse chamber 602 and fuse, wherein there is mechanical interlocking between the striker of three-stations load switch operating mechanism and fuse and high speed grounding switch operating mechanism, after striker 601 action of fusion tube, the trip gear action of load switch operation mechanism 3 can be impelled by interlock 4, then on-load switch can be made to carry out quick acting switching-off action, meet the needs of engineering safety requirement, No. four conductors (conducting rod) 801 can be grounded the conducting between contact 802 with No. three conductors (conducting rod) 805 and separate under the drive of earthing switch operating mechanism 7, three-stations load switch 1 and fuse 6 and high speed grounding switch 8 realize electrical connection by a conductor 2 and No. two 9 and one to reinstate poured with epoxy resin shaping, the module faces surface-coated of moulding by casting has ground connection conductive shielding layer 11, ground connection conductive shielding layer 11 can make module outer surface in zero potential, improve the security reliability of product, fixed contact 101 end of three-stations load switch 1 and No. four conductor 805 ends of high speed grounding switch 8 all meet standard European cable cone standard size, be convenient to outside connection.
When there is short circuit current in circuit, in fuse 6, first the fuse of fusion tube inside fuses, striker 601 ejects, and is impelled the trip gear action of 3 of load switch operation mechanism by the action of interlock 4, and then drives on-load switch quick acting switching-off action disengagement failure electric current; After on-load switch operates earthing position, the front end of fusion tube is connected with the grounding contact 106 of three-stations load switch 1 by a conductor, realizes the ground protection of front end; Then can operate operating mechanism 7 by earthed switch and make high speed grounding switch 8 action, the rear end of fusion tube is made to realize electrical connection by the earthing position of No. two conductors and high speed grounding switch 8, after completing these actions, can to be dismantled insulation end socket 5 by instrument, and then in fuse chamber, take out fusion tube change.
Claims (7)
1. a switch-fuse combination single-phase module, it is characterized in that: comprise insulation shell, the top of described insulation shell is provided with on-load switch (1), and the middle part of insulation shell is provided with fuse (6), and the bottom of insulation shell is provided with earthed switch (8); Described on-load switch (1) comprises the fixed contact (101) that is embedded in front end, insulation shell top and can coordinate with fixed contact and the moving contact moved linearly (104), the stage casing of described moving contact (104) is provided with the on-load switch guide pin bushing (105) be embedded in insulation shell, the rear portion of described moving contact (104) has grounding contact (106), and the upper rear end of described insulation shell is provided with load switch operation mechanism (3); Described fuse (6) is arranged in the fuse chamber (602) in the middle part of insulation shell, the rear end of described fuse (6) is connected by the conductor (2) being positioned at enclosure interior with between on-load switch guide pin bushing (105), the front end of described fuse (6) is connected by No. two conductors (9) being positioned at enclosure interior with between earthed switch (8), described fuse (6) rear end is provided with striker (601), and described striker (601) is connected with load switch operation mechanism (3) by interlock (4); No. three conductors (805) that described earthed switch (8) comprises the earthed switch guide pin bushing (804) be embedded in insulation shell, one end is positioned at earthed switch guide pin bushing (804) and be arranged on the earthing switch operating mechanism (7) of lower front part of insulation shell.
2. according to switch-fuse combination single-phase module according to claim 1, it is characterized in that: described moving contact (104) is arranged on one and is filled with in the closed cavity (103) of insulating gas, the front portion of described moving contact (103) is provided with one can along with the insulation spout assembly (102) that moving contact is movable in closed cavity (103), and described insulation spout assembly (102) forms the arc extinguishing nozzle that has your effect of daraf(reciprocal of farad).
3. according to the switch-fuse combination single-phase module described in claim 1 or 2, it is characterized in that: the rear end of described moving contact (104) connects an insulated tension pole (107), and the rear end of described insulated tension pole (107) extend in load switch operation mechanism (3).
4. according to switch-fuse combination single-phase module according to claim 1, it is characterized in that: the front end of described fuse (6) is provided with front contact seat (605), described front contact seat (605) is connected with No. two conductors (9), the rear end of described fuse (6) is provided with rear contact base (603), and described rear contact base (603) is connected with a conductor (2).
5. according to switch-fuse combination single-phase module according to claim 1, it is characterized in that: the opening part of described fuse chamber (602) is provided with insulation end socket (5).
6. according to switch-fuse combination single-phase module according to claim 1, it is characterized in that: the front end of described earthed switch (8) is provided with annular seal space (803), described annular seal space is filled with insulating gas in (803), is mounted with grounding contact (802) and extend into No. four conductors (801) in earthing switch operating mechanism (7) in described annular seal space (803).
7. according to switch-fuse combination single-phase module according to claim 1, it is characterized in that: outside described insulation shell, be coated with conductive coating (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648230.3A CN105244795A (en) | 2015-10-09 | 2015-10-09 | Single-phase module for load switch-fuse combination unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648230.3A CN105244795A (en) | 2015-10-09 | 2015-10-09 | Single-phase module for load switch-fuse combination unit |
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| Publication Number | Publication Date |
|---|---|
| CN105244795A true CN105244795A (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510648230.3A Pending CN105244795A (en) | 2015-10-09 | 2015-10-09 | Single-phase module for load switch-fuse combination unit |
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| CN (1) | CN105244795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112028A (en) * | 2019-04-30 | 2019-08-09 | 维龙(镇江)机电科学研究院有限公司 | A kind of breaker single-phase module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318705Y (en) * | 1997-09-27 | 1999-05-12 | 福州第一开关厂 | Vacuum load switch-fuse combined electrical equipment |
| CN101677177A (en) * | 2008-09-19 | 2010-03-24 | 沈阳昊诚电力科技有限公司 | Epoxy pouring type solid insulation switch with three-cabin |
| CN102543558A (en) * | 2012-01-13 | 2012-07-04 | 北京京东方真空电器有限责任公司 | Vacuum switch module for looped network cabinet |
| CN104377584A (en) * | 2014-11-21 | 2015-02-25 | 国家电网公司 | Solid insulation combination switchgear |
| CN104538239A (en) * | 2014-11-20 | 2015-04-22 | 平高集团有限公司 | Nozzle, arc chute using nozzle, breaker and change-over switch |
| CN205429555U (en) * | 2015-10-09 | 2016-08-03 | 维龙（镇江）电工研究院有限公司 | Load switch - fuse combined electrical apparatus list phase module |
-
2015
- 2015-10-09 CN CN201510648230.3A patent/CN105244795A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318705Y (en) * | 1997-09-27 | 1999-05-12 | 福州第一开关厂 | Vacuum load switch-fuse combined electrical equipment |
| CN101677177A (en) * | 2008-09-19 | 2010-03-24 | 沈阳昊诚电力科技有限公司 | Epoxy pouring type solid insulation switch with three-cabin |
| CN102543558A (en) * | 2012-01-13 | 2012-07-04 | 北京京东方真空电器有限责任公司 | Vacuum switch module for looped network cabinet |
| CN104538239A (en) * | 2014-11-20 | 2015-04-22 | 平高集团有限公司 | Nozzle, arc chute using nozzle, breaker and change-over switch |
| CN104377584A (en) * | 2014-11-21 | 2015-02-25 | 国家电网公司 | Solid insulation combination switchgear |
| CN205429555U (en) * | 2015-10-09 | 2016-08-03 | 维龙（镇江）电工研究院有限公司 | Load switch - fuse combined electrical apparatus list phase module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112028A (en) * | 2019-04-30 | 2019-08-09 | 维龙(镇江)机电科学研究院有限公司 | A kind of breaker single-phase module |
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Application publication date: 20160113 |