EP3624156A1 - Verbesserte schützvorrichtungsstruktur mit verbessertem hilfsschalter - Google Patents
Verbesserte schützvorrichtungsstruktur mit verbessertem hilfsschalter Download PDFInfo
- Publication number
- EP3624156A1 EP3624156A1 EP18194874.6A EP18194874A EP3624156A1 EP 3624156 A1 EP3624156 A1 EP 3624156A1 EP 18194874 A EP18194874 A EP 18194874A EP 3624156 A1 EP3624156 A1 EP 3624156A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- contactor device
- structure according
- envelope
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000002955 isolation Methods 0.000 claims abstract description 5
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- 239000004033 plastic Substances 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims description 7
- 230000036039 immunity Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000012938 design process Methods 0.000 claims 1
- 238000010200 validation analysis Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
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- 238000009877 rendering Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000007775 late Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/541—Auxiliary contact devices
- H01H50/545—Self-contained, easily replaceable microswitches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/021—Bases; Casings; Covers structurally combining a relay and an electronic component, e.g. varistor, RC circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/041—Details concerning assembly of relays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/041—Details concerning assembly of relays
- H01H2050/046—Assembling parts of a relay by using snap mounting techniques
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/041—Details concerning assembly of relays
- H01H50/045—Details particular to contactors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/44—Magnetic coils or windings
- H01H50/443—Connections to coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
- H01H50/643—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement
- H01H50/644—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement having more than one rotating or pivoting part
Definitions
- the present invention relates to an improved contactor device structure comprising at least:
- a contactor device is an electrically controlled switch used for switching an electrical power circuit.
- a contactor may be considered similar to a relay except with higher current and voltage ratings and a few other differences. Unlike general-purpose relays, contactors are designed to be directly connected to high-current load devices. Relays tend to be of low power capacity. Moreover, unlike relays, contactors are designed with features to control and suppress the arc produced when interrupting currents in high power circuits.
- contactors devices switching more than 15 amperes or in circuits rated more than a few kilowatts are usually called contactors.
- a contactor is controlled by a circuit which has a much lower power level than the main switched circuit.
- Contactors come in many forms with varying capacities and features.
- a contactor device is not intended to interrupt a short circuit current. Contactors range from those having a breaking current of several amperes to thousands of amperes and voltage rating up to many kilovolts.
- the physical size of contactors ranges from a device small enough to pick up with one hand, to large devices approximately a meter on a side.
- Contactors are used to feed electric motors, power converters heating, capacitor banks, thermal evaporators, and other electrical loads; in the frame of the present invention we will focus the attention on contactors used in railways applications.
- a contactor has substantially three main components: At least two contacts which are the current carrying part of the contactor. This may include power contacts, auxiliary contacts, and contact springs.
- An electromagnet, or “coil” provides the driving force to close the contacts.
- An envelope or enclosure which is a frame housing the contacts and the electromagnet. Enclosures are made of insulating materials, and thermosetting plastics to protect and insulate the contacts and internal parts.
- a basic contactor will have a coil input, which may be driven by either an AC or DC supply depending on the contactor design.
- the coil is usually controlled with a voltage level far lower than the main circuit voltage.
- contactors are almost exclusively fitted with normally open (“form A") contacts.
- auxiliary switch which may be a single-pole or a double-pole switch operated by the moving core of the movable contact arm assembly. This auxiliary switch may be used to remotely indicate the position of the main circuit contacts, whether open or closed. Auxiliary switches can be used to operate indicator lights, relays or just as feedback to the vehicle control system about the contactor's status.
- those auxiliary switches are a delicate component of the whole contactor since they may be subject to failures or damages more frequently than the movable contacts of the contactor.
- auxiliary switch enters into a failure state that substantially stops the operability of the contactor.
- the technical problem at the basis of the present invention is that of providing an improved contactor structure having and improved auxiliary switch structure with such structural and functional features to allow a quicker substitution of the auxiliary switch in case of failures thus reducing the maintenance action to few minutes and improving in this way the Life Cycle Cost of the contactor.
- Another aim of the present invention is that of providing an improved contactor structure having a better accessibility to the auxiliary switch portion.
- Another object of the invention is that of providing a new design of contactor device having a particularly compact structure for application wherein space is a critical issue - as more and more often happens on railway vehicles.
- a further object of the present invention is that of reducing the overall size of the contactor structure providing an alternative structure for the main coil and the corresponding moving mechanism acting on the electric contacts.
- the solution idea at the basis of the present invention is that of providing an auxiliary switch structure that is structurally independent from the contactor structure while being easily integrated into the envelope of the contactor.
- an improved contactor structure for industrial or railways applications comprising at least:
- said auxiliary switch has an envelope including a flexible flap having an end portion projecting outside the housing and including a step portion mating with an internal surface of said seat; an action on the end portion of said flap allowing to disengage the step portion from its mating surface.
- further means are provided to keep said switch in a stable and safe position; such means include at least a screw accessible from one side of the housing and positioned between the removeable switch and the portion of the housing at a side of the switch.
- an electronic board is associated to one main side of the contactor outside the housing; said electronic board being provided to regulate the electric supply to the control coil supplying the correct voltage and current values for predetermined scheduled times.
- This correct voltage and current values are supplied independently from the possible excursions of the auxiliary (battery) voltage supply and in a range of operating temperatures variable between -40°C and + 75°C.
- Electronic components are provided on said electronic board having immunity against radiating and driven disturbances and a specific insulation of at least 1500 V (at 50 Hz and for 60s) toward ground is provided for said board.
- Said electronic board is mounted at a predetermined small distance from a main lateral wall of the contactor envelope on a couple of supporting columns formed on a half shell.
- a protection coverage is provided over the electronic board with holes for the passage of the fixing screw inserted in corresponding seats at the free end of said supporting columns.
- the electronic board partially covers a command connector that is hosted is a corresponding rebated seat formed laterally and outside the housing close to the removeable switch.
- This command connector is mounted on its seat before the mounting of the electronic board and is plugged to the board with at least a couple of fast-on connectors.
- the improved contactor structure is provided with a manual switch instead of an electronic board.
- Said manual switch can directly be operated by a user.
- the construction provided with a manual switch is simplified and cheaper.
- the manual switch is provided for being operated by a user, to regulate the electric supply to the control coil manually, that is, without an electronic board.
- the contactor 1 is a switching device specifically provided for industrial or railways applications wherein a A.C. or D.C. current can be switched on and off for a safe switching actions.
- the contactor 1 is intended for high voltage ratings applications in the electric traction and in particular for railways and underground systems.
- the contactor 1 of the present invention is disclosed hereinafter with a single pole configuration with a single interruption in air, an electromagnetic control by full power coil and single state functioning.
- the contactor device 1 presents an envelope or housing 2 covering and including all the components of the device as will be disclosed hereinafter. More particularly, the fixed 8, 9 and movable contacts 11, 12 are the core of the contactor device 1 and are supported and protected by the central internal portion 4 or vane of the envelope or housing 2.
- the envelope 2 is made by a synthetic plastic material having a predetermined isolation coefficient.
- Such an envelope 2 is formed by a couple of moulded shells 2A and 2B that are connected together to define hosting vanes for the various components of the contactor device 1.
- FIG. 2 wherein the shell 2B is shown as a half portion of the envelope 2, it may be appreciated the presence of a main central vane 4 for hosting the electric contacts 8, 9 and 11, 12 of the device 1 and a couple of more lateral vanes 4, 5 and 6 for hosting a control coil 10 and a couple of auxiliary switches 15 respectively.
- a top arc chute extinguishing portion 7 covering said fixed 8, 9 and movable contacts 11, 12 is provided on the top of the contactor device 1.
- the auxiliary switches 15 are structurally independent with respect to the structure of the envelope 2. Moreover, the switch group 15 is removable and inserted in a plug-in manner in a corresponding seat 50 that is accessible in a lateral vane 6 of the envelope 2 from the opposite side with respect to the control coil 10.
- the switch 15 has its own envelope 45 that includes a flexible flap 56 that may be bent during the insertion of the switch 15 into the corresponding seat 50.
- the flap 56 has a more internal step portion 57 mating with a coupled shaped portion (shown in figure 2 ) inside the seat 50.
- a finger action on the end portion of the flexible flap 56 projecting outside the housing 2 allows to bend the flap 56 and to disengage the step portion 57 from its mating and coupling internal surface thus allowing to remove the switch 15 from its seat 50 for inspection of for a substitution due to a failure.
- the flap 56 with the step portion 57 may be considered fast plug-in and fast release means provided to mount and to keep said switch in position into the corresponding seat 50.
- further means are provided to keep said switch in a stable position; such means include at least a screw 55 accessible from one side of the housing 2 and positioned between the removeable switch 15 and the portion of the housing 2 at a side of the switch.
- auxiliary switch 15 Under the main vain 4 and between the control coil 10 and the auxiliary switch 15 there is a moving mechanism 18 for actuating the moving contacts 11, 12 of the contactor 1.
- the auxiliary switch 15 may be a single pole or a dual pole switch.
- the envelope 2 has a half base flange formed integrally with each shell 2A or 2B so that the base flange 3 is obtained once the shells are coupled together.
- the base flange 3 serves for installing the contactor 1 on a supporting wall that may be vertical or horizontal according the application needs.
- fixed terminal power contacts 13 and 14 are provided and project from a same lateral side of the envelope 2.
- the terminal 13 is the positive pole while the terminal 14 is the negative pole, provided that no preferential direction is given.
- Those fixed terminal power contacts 13, 14 are associated to the corresponding internal fixed contacts 8, 9 and to the internal moving contact 11, 12, respectively.
- the fixed contact 8 is realized by a Silver alloy while the upper fixed contact 9 is realized by a Tungsten alloy with higher resistive characteristics.
- the upper fixed contact 9 is supported by a proper arc ramp 34 that is extended toward the arc chute 7.
- a second arc ramp 36 is provided over the upper moving contact 12 and toward the arc chute 7.
- a conventional blowing coil 32 is provided between the upper terminal power contact 13 and the polar expansion 34 of the fixed contact. This blowing coil is used at the opening phase of the contactor to generate the force that help to extinguish the electric arc pushing it toward the arc chute 7.
- a conventional braid (not shown in the figures) connects the internal end of the power contact 14 to one bottom end of the moving contacts.
- a squared magnetic core 22 is provided to host the coil of the electromagnet 10.
- the electromagnet 10 may be realized with a variable number of turns according to the voltage value under which the coil shall operate.
- the coil is formed around a cylindrical insulating support like a conventional sprocket.
- the ferromagnetic housing 22 is provided always with the same dimensions and a squared section wherein the coil is hosted. So, the squared volume available may host any kind of electromagnet 10 needed for the specific application of the contactor device 1.
- the sliding shaft 21 projects outside the electromagnet 10 to act on the moving contacts.
- This coil slider is pushed by electromagnetic force generated by the coil in contrast to a spring 24 that is mounted on an opposite end of the coil slider 21 projecting from the opposite side of the coil.
- the coil slider 21 is intended for activating the moving mechanism 18 supporting the moving contacts 11, 12 of the contactor device 1, as will be explained hereinafter.
- the moving contacts 11 and 12 are supported on the upper end of a plate 16 linked to one end or arm 23 of a lever 17 of the moving mechanism 18.
- the lever 17 is hingedly supported on a pin 25 transversally fixed on the housing 2 in the vane 4.
- the lever 17 has one larger arm 23 supporting the plate 16 of the moving contacts 11, 12 and a longer arm 20 extended downwardly in a direction substantially opposite to the other arm 23.
- a connecting element 19 is hinged to the end of the coil slider 21 at one side and to the longer arm 20 at the other side.
- This connecting element 19 is hinged to the longer arm 20 in a position that is in the proximity of the supporting pin 25.
- an intermediate tilting actuator 27 is provided for acting on the auxiliary switch 15 when the moving mechanism 18 is activated by the coil slider 21.
- Such a tilting actuator 27 comprises at least a lever 26 having one end hinged to a fixed point 40 of the vane 6 wherein the auxiliary switch 15 is hosted.
- the lever 26 of said tilting actuator 27 is extended downwardly in a cantilever manner and kept at a predetermined distance from the auxiliary switch 15 by the biasing force of a spring 29.
- the lever 26 is intended to activate a command 28 of the auxiliary switch 15 against the biasing force of said spring 29 and after the lever 26 is pushed toward the auxiliary switch 15 by the combined action of the coil slider 21 and the longer arm 20 of the moving mechanism 18.
- Each of the 2switches 15 has its own lever 26 (part of the switch) so that a parallel acting is realized.
- the switch 15 is chosen with a small resilient wheel 30 at the lower end of the lever 26, whose purpose is just that of reducing the impact of the arm 20 of the moving mechanism 18 when it is pushed toward the free end of the lever 26.
- a side portion of the arm 20 is shaped with a circular recess 31 mating with the resilient wheel 30 for rendering even smoother the impact between the side portion of the arm 20 and resilient wheel 30 of the lever 26 in consideration of the high number of switching actions performed by the contactor device 1.
- Another important feature of the contactor 1 is the presence of an electronic board 60 associated to one main side of the contactor 1 outside the housing 2.
- This electronic board 60 is provided to regulate the electric supply to the electromagnet 10. More specifically the electronic board 60 is structured to supply the correct voltage and current values to the control coil 10 and for predetermined scheduled times.
- the high reliability operating conditions of the electronic board 60 are guaranteed by the presence of heat dissipating elements and circuit recovery means mounted on the electronic board 60.
- control board 60 is provided with a proper level of immunity against radiated and conducted disturbances according to the more severe railways requirements.
- a further specific insulation of at least 1500 V (at 50 Hz and for 60s) toward ground is provided.
- the electronic board 60 is mounted at a predetermined small distance from a main lateral wall of the contactor envelope 2. I n this respect, a couple of supporting columns 46 and 48 are provided on the half shell 2B close to the base flange 3.
- These supporting columns 46, 48 are integrally formed in the structure of the half shell 2B with a cylindrical shape with open end for hosting the insertion of a fixing screw 49.
- a protection coverage 47 is provided over the electronic board 60 with holes 54 for the passage of the fixing screw 49.
- This cover 47 is squared and the holes 54 are preferably formed at two corners of the squared shape being diagonally opposite.
- O-rings 53 Between the electronic board 60 and the columns 46, 48 there are dumping O-rings 53.
- the same O-rings 53 are provided between the free end of the supporting columns 46, 48 and between the fixing screw 49 and the holes 54 of the protection coverage 47.
- All this dumping O-rings 53 allow a shock and vibration protection for the electronic board 60 mounted at one contactor side.
- the electronic board 60 partially covers a command connector 65 that is hosted in a corresponding rebated seat 64 formed laterally and outside the housing 2 close to the removeable switches 15.
- This command connector 65 is mounted before the mounting of the electronic board 60, as clearly shown in figure 9 , and is plugged to the board 60 with at least a couple of fast-on connectors 67 and 68.
- command connector 65 outside the contactor envelope has a great advantage to avoid any interference with the movable parts of the contactor and for rendering extremely easy the connection to the electronic board 60.
- a failure of the board 60 may be easily checked from the outside of the contactor thanks to the connectors 67 and 68 that may be used to transfer electric maintenance signals to the board 60 and for checking its functionality.
- the board may be easily substituted removing the coverage 47 without affecting the structure of the contactor.
- the performances of the contactor device 1 according to the present invention are also due to the specific structure of the arc chute 7 component.
- the heat developed by the resulting electrical arc is very high, ultimately causing the metal on the contact to migrate with the current.
- the extremely high temperature of the arc slowly destroys the contact metal, causing some material to escape into the air as fine particulate matter.
- the arc extinguishing portion 7 provided in the contactor device of the present invention is structured with a plurality of parallel plates supported in a half cover formed in each shell 2A and 2B of the envelope 2.
- a plurality of slots is formed in the lower portion 41 of each half shell 2A and 2B of the envelope 2.
- a dissipation plate 38 or 38' is hosted in each facing slot 39.
- Thep lates are preferably formed by ceramic, but even other material may be used.
- each plate 38 has an adjacent plate 38' that is shifted along the vertical direction and 180° rotated on the vertical axis.
- the odd plates 38 are supported in a same position in the lower portion 41 of the arc chute, as well as the even plates 38' are supported there between.
- the arc chute 7 is structurally provided with a proper number of plates 38 or 38' according to the voltage range that must be treated and the corresponding arc chute energy capacity that shall be extinguished in total security.
- the contactor device 1 of the present invention solves the technical problem and achieves a number of advantages the main of which is given by his improved reliability and longer working life.
- the moving mechanism 18 provided for acting on the auxiliary switch has a stronger and more reliable structure if compared with the known solutions.
- the distances between the plates 38, 38' of the arc chute 7 are widely dimensioned for safe application in polluted environments.
- the indirect blow out circuit and the presence of the additional arc contacts 9 and 12 makes the LTHH50 contactors suitable to work both with high and low currents.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18194874.6A EP3624156B1 (de) | 2018-09-17 | 2018-09-17 | Verbesserte schützvorrichtungsstruktur mit verbessertem hilfsschalter |
PCT/EP2019/072799 WO2020057908A1 (en) | 2018-09-17 | 2019-08-27 | Improved contactor device structure with improved auxiliary switch |
CN201980060862.4A CN112714940A (zh) | 2018-09-17 | 2019-08-27 | 具有改进的辅助开关的改进的接触器装置结构 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18194874.6A EP3624156B1 (de) | 2018-09-17 | 2018-09-17 | Verbesserte schützvorrichtungsstruktur mit verbessertem hilfsschalter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3624156A1 true EP3624156A1 (de) | 2020-03-18 |
EP3624156B1 EP3624156B1 (de) | 2022-07-06 |
Family
ID=63637770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18194874.6A Active EP3624156B1 (de) | 2018-09-17 | 2018-09-17 | Verbesserte schützvorrichtungsstruktur mit verbessertem hilfsschalter |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3624156B1 (de) |
CN (1) | CN112714940A (de) |
WO (1) | WO2020057908A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112531470B (zh) * | 2020-12-11 | 2023-01-03 | 中车大连电力牵引研发中心有限公司 | 高压转换开关箱 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3324431A (en) * | 1962-04-24 | 1967-06-06 | Ite Circuit Breaker Ltd | Electromagnetic contactor having interchangeable auxiliary devices |
JPS6245882U (de) * | 1985-09-06 | 1987-03-19 | ||
US4774484A (en) * | 1985-04-09 | 1988-09-27 | Square D Company | Auxiliary electrical contact for electromagnetic contactor |
US20150287560A1 (en) * | 2014-04-02 | 2015-10-08 | Schaltbau Gmbh | Direct-current contactor with additional switching capability for ac loads and a polarity against the preferential current direction |
US9583292B2 (en) * | 2012-12-18 | 2017-02-28 | Schneider Electric Industries Sas | Modular electrical switch device comprising at least one unipolar cut-off unit and a switch assembly comprising such devices |
KR20170002853U (ko) * | 2016-02-02 | 2017-08-10 | 엘에스산전 주식회사 | 전자접촉기와 서지보호기의 조립 구조 |
-
2018
- 2018-09-17 EP EP18194874.6A patent/EP3624156B1/de active Active
-
2019
- 2019-08-27 WO PCT/EP2019/072799 patent/WO2020057908A1/en active Application Filing
- 2019-08-27 CN CN201980060862.4A patent/CN112714940A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3324431A (en) * | 1962-04-24 | 1967-06-06 | Ite Circuit Breaker Ltd | Electromagnetic contactor having interchangeable auxiliary devices |
US4774484A (en) * | 1985-04-09 | 1988-09-27 | Square D Company | Auxiliary electrical contact for electromagnetic contactor |
JPS6245882U (de) * | 1985-09-06 | 1987-03-19 | ||
US9583292B2 (en) * | 2012-12-18 | 2017-02-28 | Schneider Electric Industries Sas | Modular electrical switch device comprising at least one unipolar cut-off unit and a switch assembly comprising such devices |
US20150287560A1 (en) * | 2014-04-02 | 2015-10-08 | Schaltbau Gmbh | Direct-current contactor with additional switching capability for ac loads and a polarity against the preferential current direction |
KR20170002853U (ko) * | 2016-02-02 | 2017-08-10 | 엘에스산전 주식회사 | 전자접촉기와 서지보호기의 조립 구조 |
Also Published As
Publication number | Publication date |
---|---|
CN112714940A (zh) | 2021-04-27 |
WO2020057908A1 (en) | 2020-03-26 |
EP3624156B1 (de) | 2022-07-06 |
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