CN204905997U - Dual supply changes cuts device - Google Patents
Dual supply changes cuts device Download PDFInfo
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- CN204905997U CN204905997U CN201520709622.1U CN201520709622U CN204905997U CN 204905997 U CN204905997 U CN 204905997U CN 201520709622 U CN201520709622 U CN 201520709622U CN 204905997 U CN204905997 U CN 204905997U
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- 230000009977 dual effect Effects 0.000 title abstract description 12
- 238000009422 external insulation Methods 0.000 claims abstract description 11
- 230000004888 barrier function Effects 0.000 claims description 17
- 238000012423 maintenance Methods 0.000 claims description 17
- 230000008859 change Effects 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Abstract
The utility model relates to a dual supply changes cuts device, including two operating power, logic control unit that change to cut the body, low -voltage circuit breaker, control low -voltage circuit breaker deciliter, can follow the push -and -pull rod that the axial of changeing to cut the body is stretched out and drawn back, low -voltage circuit breaker is through the operating power and be connected with the push -and -pull rod, it leads electrical pillar, cover including the center and locates the center and lead the electrically conductive sleeve of first part periphery of electrical pillar, establish the centering and lead the inner insulating layer between electrical pillar and the electrically conductive sleeve, set up and locate the center in the external insulation layer of electrically conductive sleeve periphery, a pair of electrical connection point that is connected with electrically conductive sleeve, cover and lead the insulating sleeve of electrical pillar's a second partial periphery, overlap the center of locating and lead the insulating layer of electrical pillar's three periphery, lead the 2nd electrical connection point that electrical pillar is connected with central change to cut the body, two centers are led electrical pillar and are connected with the double loop power supply, are connected with the load phase for one in a pair of electrical connection point. The utility model discloses connect reliable, work a telephone switchboard simple, lower, the easy access of cost.
Description
Technical field
The utility model belongs to low-voltage network technical field, is specifically related to a kind of device realizing two-way electric power incoming line and switch.
Background technology
At present, low-voltage dual power change-over switch common on electricity market, the different 400 volts of electric power incoming lines of main employing two-way, access two low-voltage circuit breakers respectively, and set up the scheme of the electric blocking between two low-voltage circuit breakers, thus the reasonable switching realized the different 400 volts of electric power incoming lines of two-way, under ensureing 400 volts, road power loss (or fault) state, suitable time-delay is to 400 volts, another road Power convert, reach the continuous function of supplying power to 400 volts of loads, substantially can meet the power demands of 400 volts of power consumers.
Since Long-Time Service, such scheme also brings many inconvenience at the scene.First be the often malfunctioning problem of electric blocking, under electric power incoming line dead electricity (or fault) state of 400 volts, a road, cause being forced to have a power failure and checking and maintenance whether to adopt new reliable electric to connect and conversion regime head it off 400 volts of power consumers.Secondly, can consider from economical angle, conventional low dual-power transfer switch needs two low-voltage circuit breakers uninterruptedly to switch power supply to coordinate realization, and cost is higher, adopt a low-voltage circuit breaker to solve translation function.Moreover, common low-voltage dual power change-over switch does not possess two low-voltage circuit breaker interruption maintenance functions, wait to run under state position when some low-voltage circuit breakers are in, can not shirk and carry out detecting or overhauling, can only under whole power down mode, can the low-voltage circuit breaker after could overhauling this low-voltage circuit breaker or changing fault, have the low-voltage circuit breaker position under clear and definite inspecting state, maintenance can be shirked conveniently to low-voltage circuit breaker, or more changing jobs after fault.Also having low-voltage dual power change-over switch common at present, by also needing electric blocking to connect between two low-voltage circuit breakers, constructing comparatively loose, integration can be taked to close form, namely simplify wiring, play again effect of site safety practicality.Therefore, for solving the problem, needing a kind of new duplicate supply of design to turn cutting apparatus, breaking through the technical vulnerability of existing low-voltage dual power change-over switch.
Summary of the invention
The purpose of this utility model be to provide a kind of connect reliable, wiring simple, cost duplicate supply that is lower, easy access turns cutting apparatus.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of duplicate supply turns cutting apparatus, for realizing the connection between double loop power supply and load, it comprise two of axially paralleling setting turn cut body, be arranged at turning described in two cut low-voltage circuit breaker between body, control described in low-voltage circuit breaker deciliter operating power, logic control element, can turn along described the pull bar cutting the axial stretching of body under the control of described logic control element, described low-voltage circuit breaker is connected with described pull bar through described operating power;
Described turning cuts body and comprises the center conductive post that axially can be divided into three parts along it, be sheathed on the conducting sleeve of first portion perimeter of described center conductive post, be arranged at the inner insulating layer between described center conductive post and described conducting sleeve, be arranged at the external insulation layer of described conducting sleeve periphery, a pair first electric connecting points be connected with described conducting sleeve through described external insulation layer, be sheathed on the insulating sleeve of the second part periphery of described center conductive post, be sheathed on the insulating barrier of the 3rd portion perimeter of described center conductive post, the second electric connecting point be connected with described center conductive post through described insulating barrier, the center conductive post cut in body that turns described in two is connected with the power supply described in two-way respectively, each described turning is cut in body, and the first electric connecting point described in is conducted with described load and is connected, turning described in one cuts in body the part that is provided with described conducting sleeve and turning described in another, and to cut in body the part being provided with described insulating barrier corresponding and form electrical power source connection, and it is corresponding and formed and stop using as a servant maintenance portion that turning described in two cuts in body the part being provided with described insulating sleeve, when described low-voltage circuit breaker be positioned at described electrical power source connection time, the two ends of described low-voltage circuit breaker are conducted with the first electric connecting point described in another and the second described electric connecting point respectively and are connected.
On described center conductive post, the part being arranged with described insulating sleeve is positioned in the middle part of it, and the part being arranged with described conducting sleeve lays respectively at its both ends with the part being provided with the second described electric connecting point.
The described cross section of cutting body that turns is circle.
The line of the first electric connecting point described in a pair turns the center of cutting body section through described.
Because technique scheme is used, the utility model compared with prior art has following advantages: 1, duplicate supply of the present utility model turns cutting apparatus, adopts reliable connected mode, avoids user and to be forced to have a power failure the problem of carrying out overhauling; 2, duplicate supply of the present utility model turns cutting apparatus and adopts a low-voltage circuit breaker, can improve service efficiency, reduce costs, have higher practical value; 3, duplicate supply of the present utility model turns cutting apparatus and has clear and definite overhauled position, and can be selected by user flexibility can the interruption maintenance time period, under the prerequisite of the operation that primarily ensures safety, and quick rotation low-voltage circuit breaker, easy access; 4, duplicate supply of the present utility model turns the closed form of cutting apparatus employing integration, and solve low-voltage dual power change-over switch structure common at present comparatively loose, electric blocking connects the defects such as loaded down with trivial details, ensures again effect of site safety practicality while simplification wiring.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram that duplicate supply of the present utility model turns cutting apparatus.
Accompanying drawing 2 is that duplicate supply of the present utility model turns the schematic diagram of cutting apparatus when access one road power supply.
Accompanying drawing 3 is the A-A view that duplicate supply of the present utility model turns cutting apparatus.
Accompanying drawing 4 is that duplicate supply of the present utility model turns the schematic diagram of cutting apparatus when accessing another road power supply.
Accompanying drawing 5 is the B-B view that duplicate supply of the present utility model turns cutting apparatus.
Accompanying drawing 6 is that duplicate supply of the present utility model turns the schematic diagram of cutting apparatus when overhauling.
Accompanying drawing 7 is the C-C view that duplicate supply of the present utility model turns cutting apparatus.
Accompanying drawing 8 turns the normal powered control action flowchart of cutting apparatus for duplicate supply of the present utility model.
Accompanying drawing 9 is that duplicate supply of the present utility model turns cutting apparatus and turns the control flowchart of cutting at least one road incoming power fault (dead electricity).
Accompanying drawing 10 is that duplicate supply of the present utility model turns the control flowchart of cutting apparatus when low-voltage circuit breaker fault.
Embodiment
Below in conjunction with embodiment, the utility model is further described.
Embodiment one: with reference to shown in accompanying drawing 1, a kind of duplicate supply for realizing the connection between double loop power supply and load turns cutting apparatus 1, comprises two turns and cuts body 2, low-voltage circuit breaker DL, electronic operating power D, logic control element K and pull bar X.
Two turn that to cut body 2 all cylindrical, and its cross section is rounded, and two turn the axis cutting body 2 and parallel and arrange and be positioned at sustained height position.Low-voltage circuit breaker DL is movably arranged on two turns and cuts between body 2, and its deciliter is controlled by operating power D.Pull bar X can stretch along turning the axis direction cutting body 2, its expanding-contracting action carries out under the control of logic control element K, low-voltage circuit breaker DL is connected on pull bar X through operating power D, when pull bar X stretches, it can turn the movement of cutting the axis direction of body 2 in energize low-pressure circuit breaker DL edge.
Cut body 2 and there is identical structure, cut body 2 for each turn and comprise the structures such as center conductive post 3, conducting sleeve 4, inner insulating layer 5, external insulation layer 6, insulating sleeve 7, insulating barrier 8 for two turns.
Center conductive post 3 is positioned at turn axis place of cutting body 2 and arranges along axis, two center conductive posts 3 are connected with two-way electric power incoming line (400V electric power incoming line I and 400V electric power incoming line II) respectively, such as form electric connecting point b, a f in the upper end of center conductive post, thus be connected with 400V electric power incoming line II with 400V electric power incoming line I respectively.Center conductive post 3 is along its axis and be divided into three parts, and be referred to as Part I, Part II and Part III, the height of three parts can be set to identical.
Conductive sleeve jacket casing 4 is located on the periphery of the Part I of center conductive post 3, and fills inner insulating layer 5 between conducting sleeve 4 and the center conductive post 3 of Part I, and the periphery of conducting sleeve 4 arrange be external insulation layer 6.Through external insulation layer 6, a pair first electric connecting points c, c are set ' or g, g ', this first electric connecting point c, c ' or g, g ' can be conducted with conducting sleeve 4 is connected.Usually these a pair first electric connecting points c, c ' or g, g ' line through turning a center of cutting body 2 cross section, namely the two is arranged on the two ends turning and cut a diameter of body 2.Two conducting blocks that can arrange through external insulation layer 6 are used as this first electric connecting point c, c ' or g, g '.First electric connecting point c or g is conducted with load and is connected, and another the first electric connecting point c ' or g ' is then for connecting low-voltage circuit breaker DL.
Insulating sleeve 7 is set on the periphery of the Part II of center conductive post 3.
Insulating barrier 8 is set on the periphery of the Part III of center conductive post 3, through this insulating barrier 8, the second electric connecting point f ' or b ' is set, this the second electric connecting point f ' or b ' can be conducted with center conductive post 3 and be connected, and the conducting block that can arrange equally through insulating barrier 8 is used as this second electric connecting point f ' or b '.
Usually, on center conductive post 3, the part being arranged with insulating sleeve 7 is positioned in the middle part of it, and the part being arranged with conducting sleeve 4 lays respectively at its both ends with the part being arranged with insulating barrier 8.
One turns and cuts the part that is provided with conducting sleeve 4 in body 2 and another turn to cut the part being provided with insulating barrier 8 in body 2 corresponding and form electrical power source connection, and two turn that to cut the part being provided with insulating sleeve 7 in body 3 corresponding and formed and stop using as a servant maintenance portion.The such as embodiment shown in accompanying drawing 1, the turning of left side cuts turning of the part that is provided with conducting sleeve 4 in body 2 and right side and cuts the part being provided with insulating barrier 8 in body 2 and be arranged at top accordingly, the turning of left side cuts turning of the part that is provided with insulating sleeve 7 in body 2 and right side and cuts the part being provided with insulating sleeve 7 in body 2 and be arranged at middle part accordingly, and the turning of the part that the turning of left side cuts and be provided with insulating barrier 8 in body 2 and right side cuts the part being provided with conducting sleeve 4 in body 2 and be arranged at bottom accordingly.Therefore in the present embodiment two turn cut body 2 amount to formation two electrical power source connection and one stop using as a servant maintenance portion.
Define two and turn that to cut two bus places mutually the most close on body 2 be the inner side of the two, rightabout is outside, then can by c, c in a pair first electric connecting points c ', a g ' of ' or g, g ' be arranged on inner side, also this is arranged on inner side for the second electric connecting point f ', b '.
Along with the movement of the flexible drive low-voltage circuit breaker DL of pull bar X, make low-voltage circuit breaker DL cut body 2 relative to two turns and be positioned at different positions, realize different annexations.Specific as follows:
1, load is powered at by 400V power line II:
Shown in accompanying drawing 2 and accompanying drawing 3, pull bar X extends and low-voltage circuit breaker DL is pushed to top, and be positioned at that electrical power source connection of top, now, the two ends of low-voltage circuit breaker DL are conducted with a first electric connecting point c ' and the second electric connecting point f ' respectively and are connected.Therefore 400V power line II is successively through electric connecting point e → f → f ' → low-voltage circuit breaker DL(H) (represent low-voltage circuit breaker close) → c ' → c → d and realize conducting, formed the power supply by electric loading.
From accompanying drawing 3, tie point f connects through-type conductive path layer (in figure, right side turns the second electric connecting point cutting body) through good conductor, effective isolation reaches the security protection of good conductor and insulating barrier, reliably be connected to the f ' of low-voltage circuit breaker DL simultaneously, by low-voltage circuit breaker DL co-bit state, tie point C ' is through the annular conductive path layer (in figure, left side turns the conducting sleeve cutting body) of opposite side, coordinate the safety isolation protective of inner insulating layer and external insulation layer, reliably be connected to the opposite side tie point c of low-voltage circuit breaker DL, complete and realize tie point e → f → f ' → low-voltage circuit breaker DL(H) → c ' → c → d guiding path, formed and power under this logical condition to by electric loading.
2, load is powered at by 400V power line I:
Shown in accompanying drawing 4 and accompanying drawing 5, pull bar X shortens and low-voltage circuit breaker DL is dragged to below, and be positioned at that electrical power source connection of below, now, the two ends of low-voltage circuit breaker DL are conducted with a second electric connecting point b ' and the first electric connecting point g ' respectively and are connected.Therefore 400V power line I is successively through electric connecting point a → b → b ' → low-voltage circuit breaker DL(H) → g ' → g → h and realize conducting, formed the power supply by electric loading.
From accompanying drawing 5, tie point b connects through-type conductive path layer (in figure, left side turns the second electric connecting point cutting body) through good conductor, effective isolation reaches the security protection of good conductor and insulating barrier, reliably be connected to the b ' of low-voltage circuit breaker DL simultaneously, by low-voltage circuit breaker DL co-bit state, tie point g ' is through opposite side annular conductive path layer (in figure, right side turns the conducting sleeve cutting body), coordinate the safety isolation protective of inner insulating layer and external insulation layer, reliably be connected to the opposite side tie point g of low-voltage circuit breaker DL, complete and realize tie point a → b → b ' → low-voltage circuit breaker DL(H) → g ' → g → h guiding path, formed and power under this logical condition to by electric loading.
3, low-voltage circuit breaker stops using as a servant (maintenance):
As shown in accompanying drawing 6 and accompanying drawing 7, low-voltage circuit breaker DL moves to the position of stopping using as a servant maintenance portion and opens low-voltage circuit breaker (DL(F) and represent that low-voltage circuit breaker is opened), low-voltage circuit breaker DL completes and departs from 400V power line I and 400V power line II, be in and stop using as a servant (maintenance) state, now user can under guarantee powering-off state, safety quick rotation low-voltage circuit breaker DL as required.
From accompanying drawing 7,400V power line I is by good conductor (in figure, left side turns the center conductive post cutting body), can realize with the continuous vertical of section shown in section shown in accompanying drawing 3, accompanying drawing 5 to conducting, simultaneously, 400V power line II also by good conductor (in figure, right side turns the center conductive post cutting body), can realize with the continuous vertical of section shown in section shown in accompanying drawing 3, accompanying drawing 5 to conducting.
Realize the coordinating of its good conductor shown in accompanying drawing 7 and insulating barrier low-voltage circuit breaker DL to complete and depart from 400V power line I, 400V power line II, namely, under low-voltage circuit breaker DL is in and stops labour (maintenance), user is facilitated to check low-voltage circuit breaker DL, detect or more change jobs as required.
As shown in Figure 8, the action executing flow process that this duplicate supply turns cutting apparatus is: initially stop using as a servant (maintenance) state as it is in low-voltage circuit breaker, now, select available 400V power supply by logic control element K.According to 400V power line I, then logic control element K controls pull bar X and is retracted to appropriate point position, and restart operation power supply D realizes the closed of low-voltage circuit breaker DL; According to 400V power line II, then logic control element K controls pull bar X and is stretched to appropriate point position, and restart operation power supply D realizes the closed of low-voltage circuit breaker DL.
As shown in Figure 9, when at least one road incoming power breaks down (dead electricity), its control action flow process is as follows: when incoming power breaks down (dead electricity), logic control element K judges specifically occur which kind of fault, be a road incoming power fault or two-way incoming power all breaks down, then process according to different flow processs.If only have a road incoming power fault (400V power line I fault or 400V power line II fault), then first start-up operation power supply D realizes low-voltage circuit breaker DL separating brake, control pull bar X again and move to closed low circuit breaker DL behind appropriate point position, powered by the power supply of the non-fault in another road.If the equal fault of two-way inlet wire, then first start-up operation power supply D realizes low-voltage circuit breaker DL separating brake, then controls pull bar X and move to appropriate point position, is converted to low-voltage circuit breaker and stops using as a servant (maintenance) state, recover normal power supply after maintenance.
As shown in Figure 10, when there is doubtful low-voltage circuit breaker fault, judged by logic control element K, if the determination result is YES, then disconnection electric loading, then control pull bar X and move to appropriate point position, be converted to low-voltage circuit breaker and stop using as a servant (maintenance) state; If judged result is no, then carry out the judgement process of incoming power fault as shown in Figure 9.
Above-mentioned duplicate supply turn cutting apparatus can by combination realize three tunnels, four tunnels even more multiple power supplies turn cut.
The technical program, low-voltage dual power change-over switch common on relative existing market, first be optimize to solve the often malfunctioning problem of electric blocking, adopt new electric connecting mode, rational space transforming function, ensure that user is under road 400V power loss (or fault) state, safe and reliable to another road 400V power source transition load.Secondly, a low-voltage circuit breaker is adopted to carry out alternative existing low-voltage dual power change-over switch, two low-voltage circuit breakers are needed to coordinate the problem switching power supply, while reducing costs, ensure safety and realize low-voltage dual power handoff functionality, this device flexible combination can realize three road 400V power supplys to electricity consumption load supplying, and even under four road 400V Power Supplies Condition, flexible combination, to electricity consumption load supplying, can realize safety convenient and solve the objective demand of low pressure electric loading to reliability flexibly.3rd, solve common low-voltage dual power change-over switch and do not possess the problem can shirked and carry out detecting or overhauling, this device arranges clear and definite overhauled position, and being selected by user flexibility can the interruption maintenance time period, primarily ensure safety operation prerequisite under, quick rotation low-voltage circuit breaker.Also have comparatively crucially, this device adopts integration to close form, and solve low-voltage dual power change-over switch structure common at present comparatively loose, electric blocking connects the defects such as loaded down with trivial details, ensures again effect of site safety practicality while simplifying wiring.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection range of the present utility model.
Claims (4)
1. a duplicate supply turns cutting apparatus, for realizing the connection between double loop power supply and load, it is characterized in that: it comprise two of axially paralleling setting turn cut body, be arranged at turning described in two cut low-voltage circuit breaker between body, control described in low-voltage circuit breaker deciliter operating power, logic control element, can turn along described the pull bar cutting the axial stretching of body under the control of described logic control element, described low-voltage circuit breaker is connected with described pull bar through described operating power;
Described turning cuts body and comprises the center conductive post that axially can be divided into three parts along it, be sheathed on the conducting sleeve of first portion perimeter of described center conductive post, be arranged at the inner insulating layer between described center conductive post and described conducting sleeve, be arranged at the external insulation layer of described conducting sleeve periphery, a pair first electric connecting points be connected with described conducting sleeve through described external insulation layer, be sheathed on the insulating sleeve of the second part periphery of described center conductive post, be sheathed on the insulating barrier of the 3rd portion perimeter of described center conductive post, the second electric connecting point be connected with described center conductive post through described insulating barrier, the center conductive post cut in body that turns described in two is connected with the power supply described in two-way respectively, each described turning is cut in body, and the first electric connecting point described in is conducted with described load and is connected, turning described in one cuts in body the part that is provided with described conducting sleeve and turning described in another, and to cut in body the part being provided with described insulating barrier corresponding and form electrical power source connection, and it is corresponding and formed and stop using as a servant maintenance portion that turning described in two cuts in body the part being provided with described insulating sleeve, when described low-voltage circuit breaker be positioned at described electrical power source connection time, the two ends of described low-voltage circuit breaker are conducted with the first electric connecting point described in another and the second described electric connecting point respectively and are connected.
2. duplicate supply according to claim 1 turns cutting apparatus, it is characterized in that: on described center conductive post, the part being arranged with described insulating sleeve is positioned in the middle part of it, and the part being arranged with described conducting sleeve lays respectively at its both ends with the part being provided with the second described electric connecting point.
3. duplicate supply according to claim 1 turns cutting apparatus, it is characterized in that: the described cross section of cutting body that turns is circle.
4. duplicate supply according to claim 1 turns cutting apparatus, it is characterized in that: the line of the first electric connecting point described in a pair turns the center of cutting body section through described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520709622.1U CN204905997U (en) | 2015-09-15 | 2015-09-15 | Dual supply changes cuts device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520709622.1U CN204905997U (en) | 2015-09-15 | 2015-09-15 | Dual supply changes cuts device |
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| CN204905997U true CN204905997U (en) | 2015-12-23 |
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| CN201520709622.1U Active CN204905997U (en) | 2015-09-15 | 2015-09-15 | Dual supply changes cuts device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048625A (en) * | 2015-09-15 | 2015-11-11 | 江苏省电力公司苏州供电公司 | Double-power source switching device |
| CN107819357A (en) * | 2016-09-13 | 2018-03-20 | 通用电气公司 | Isolation parallel UPS system with abort situation detection |
-
2015
- 2015-09-15 CN CN201520709622.1U patent/CN204905997U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048625A (en) * | 2015-09-15 | 2015-11-11 | 江苏省电力公司苏州供电公司 | Double-power source switching device |
| CN105048625B (en) * | 2015-09-15 | 2017-12-19 | 江苏省电力公司苏州供电公司 | Dual power supply turns cutting apparatus |
| CN107819357A (en) * | 2016-09-13 | 2018-03-20 | 通用电气公司 | Isolation parallel UPS system with abort situation detection |
| CN107819357B (en) * | 2016-09-13 | 2023-01-24 | Abb瑞士股份有限公司 | Isolated parallel UPS system with fault location detection |
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