EP0905732A2 - Dispositif de contacts auxiliaires pour le raccordement d'un contacteur avec correction de facteur de puissance - Google Patents

Dispositif de contacts auxiliaires pour le raccordement d'un contacteur avec correction de facteur de puissance Download PDF

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Publication number
EP0905732A2
EP0905732A2 EP98307773A EP98307773A EP0905732A2 EP 0905732 A2 EP0905732 A2 EP 0905732A2 EP 98307773 A EP98307773 A EP 98307773A EP 98307773 A EP98307773 A EP 98307773A EP 0905732 A2 EP0905732 A2 EP 0905732A2
Authority
EP
European Patent Office
Prior art keywords
contacts
contactor
slide
auxiliary contact
contact device
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.)
Withdrawn
Application number
EP98307773A
Other languages
German (de)
English (en)
Other versions
EP0905732A3 (fr
Inventor
Miguel Giminez Ortiz
Pere Perez Riera
Geert Van Causbroeck
Asensio Roldan Blas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Electrification Solutions SL
Original Assignee
GE Power Controls Iberica SL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GE Power Controls Iberica SL filed Critical GE Power Controls Iberica SL
Publication of EP0905732A2 publication Critical patent/EP0905732A2/fr
Publication of EP0905732A3 publication Critical patent/EP0905732A3/fr
Withdrawn legal-status Critical Current

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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
    • H01H50/543—Auxiliary switch inserting resistor during closure of contactor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H2003/323—Driving mechanisms, i.e. for transmitting driving force to the contacts the mechanisms being adjustable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch

Definitions

  • This invention consists of an auxiliary contact device for connection to power factor correction contactors, in order to protect the contactor from the high current peaks occurring on its activation, for which purpose said activation first closes the contacts of the auxiliary contact device and then closes the contacts of the contactor, followed by disconnection of the auxiliary contact device after the contacts of the contactor are closed.
  • the invention is intended to make possible application thereof to a complete line of contactors, for which it has means of regulating the time that must elapse for disconnection to take place after closing of the contacts of the contactor.
  • the invention is intended to produce a greater pressure of the moving contacts on the fixed contacts, the greater the power of the contactor, a better passage of current being obtained.
  • the invention is fundamentally applicable to those contactors, activation of which connects a capacitor battery to an industrial installation, in order to correct the power factor.
  • Said contactors must be protected from the high current peaks that occur on connection of the contactor on the capacitor battery.
  • auxiliary contact devices are used, the moving contacts of which engage with the traction gear of the moving contacts of the contactor, the input and output phases of the contactor being connected to the input and output phases of the auxiliary contact device through resistors, so that when the contactor is activated, the contacts of the auxiliary contact device are closed first, the current peaks being limited by the resistors, and then the contacts of the contactor are closed.
  • the casing of the contactor and auxiliary contact device is equipped with means of coupling and fastening to each other.
  • the contacts of the auxiliary device are also kept closed, and after cutoff or disconnection of the contactor, cutoff is carried out through the auxiliary contacts.
  • This type of contactor presents the following problems:
  • auxiliary contact devices were developed that disconnect after closing of the contacts of the contactor, so that the endurance and cutoff capacity directly depend on the contactor.
  • auxiliary contact devices have the disadvantage that they disconnect after closing of the contacts of the contactor by means of slides with magnets, which present the problem of easy accumulation of dirt, so that they have to be overhauled more or less regularly, aside from the fact that shocks make them lose their properties, having to be replaced.
  • they present difficulties at the time of assembly in the manufacturing process. Nor do they make it possible to regulate the time that must elapse for disconnection to take place after closing of the contacts of the contactor.
  • the contactors In both types of auxiliary contact devices, the contactors have a contact for discharge of the capacitors through discharge resistors, when the contactor is disconnected, so that the contacts are closed in successive operations on vacuum capacitors.
  • the invention has developed a new auxiliary contact device in which, like the conventional ones, when the contactor is activated, in the first place, the contacts of said auxiliary contact device are closed, the current peaks being limited by the resistors, and then the contacts of the contactor are closed.
  • the auxiliary contact device has means for producing its disconnection after closing of the contacts of the contactor, so that, even if there is dirt on said contacts of the contactor, current does not circulate through the resistors, preventing the latter from burning, since current only circulates for a few milliseconds.
  • this fact means that the power of connection will not be limited by the auxiliary contactor device, but will be imparted by the contactor itself, which considerably increases the maximum power to be used and the electric lifetime, since the contactors are the components designed to withstand the power, and not the auxiliary contact devices.
  • the electric endurance is determined by the duration of the contacts of the contactor and not of the contacts of the auxiliary contact device.
  • the invention is characterized in that it has means for regulating the time it takes for the auxiliary contact device to be disconnected, after closing of the contacts of the contactor, in order to permit its application to the whole range of powers for which the contactors are designed.
  • the invention has means that increase the pressure of the moving contacts on the fixed contacts, the longer the time it takes for disconnection to be made, which makes possible a better passage of current, since the greater the power of the contactor, the longer the time it takes for disconnection to be made and, therefore, the greater the pressure exerted on the contacts.
  • the means for producing disconnection of the auxiliary contact device after closing of the contacts of the contactor are determined by a casing in which the fixed contacts of the device are included, as well as means of coupling and fastening to the contactor, and in which a center housing has been provided for positioning and guiding of a frame that includes the means of engagement to the traction gear of the contacts of the contactor.
  • the frame is endowed with means of locking/unlocking of a slide that includes the moving contact, which is also positioned and guided in the center housing of the frame, so that the fixed contacts are positioned on the path of the moving contacts provided in the casing.
  • the device of the invention has means of maintaining the slide in a position in which the moving contacts are separated from the fixed contacts, when the device is coupled to the contactor.
  • it also has means of maintaining the frame in an upper position that keeps it locked to the moving contact slide in the position in which the moving contacts are separated from the fixed contacts at a given distance, so that, on pulling of the contactor over the frame, the latter is moved together with the slide, connection of the fixed contacts being made with the moving contacts, to a position in which the slide is unlocked from the frame, the slide returning to its initial position, and the moving contacts being separated from the fixed contacts.
  • the contactor stops pulling from the frame the latter recovers its initial locked position with the slide, being ready for a new cycle.
  • the means of locking/unlocking of the frame are determined by a spring-assisted clamp that resists disassembly.
  • the axis of rotation of the clamp is located in its lower zone, while in its upper zone it has a crosspiece on which a cylinder is located, which turns freely and in which a lower hook of the moving contact slide is retained.
  • the clamp is endowed with a leverlike extension on whose path a riblike projection has been provided, so that, on pressing the lever with the projection, the angular displacement of the crosspiece and cylinder is produced, the hook of the moving contact slide being released.
  • the contactor stops pulling on the frame, the latter regains its initial position, so that the lever stops pressing on the rib-like projection, the latter returning to its initial position until making contact with the hook of the slide, locking again taking place and the unit being ready for a new cycle.
  • the means for regulating the time it takes to disconnect the auxiliary contact device after closing of the contacts of the contactor are determined by a selector, which is included in the casing and has parallel riblike projections situated at different heights, one of which constitutes the riblike projection already described, where it contacts the lever for tilting and unlocking, so that the time of disconnection or unlocking of the slide depends on the height at which the riblike projection situated on the frame-slide path is located.
  • the selected position of the selector for choosing the time of disconnection is fixed by means of a pin, which prevents the variation of its position and, therefore, its accidental or inadvertent disconnection. This chosen position depends on the size of the contactor.
  • the latter In order to guide the slide in the center housing of the casing, the latter has fins running through longitudinal channels provided in said center housing.
  • the slide has a stop situated below the fixed contacts in order to limit the ascending travel of the slide.
  • the means of maintaining the slide in a position in which the moving contacts are separated from the fixed contacts are determined by a spring, fastened at the bottom of the center housing of the casing, and which runs through the frame in order to be housed in a cylindrical receptacle provided in the slide, so that when the slide descends, the spring is compressed, which, after unlocking takes places, forces the slide to rise to its initial position, until it makes contact with the stop provided in the casing.
  • the moving contact for discharge of the capacitors is characterized in that it is included in a recess forming part of the frame, which has an appendage projecting from the casing, the contact being retained in the recess by a spring that maintains pressure on the fixed contact during travel of the frame.
  • the means that increase the pressure of the moving contacts on the fixed contacts, the longer the time it takes for disconnection or unlocking, are determined by recesses provided in the slide, in which the spring-assisted moving contacts are located, which are compressed until unlocking takes place, exerting greater pressure, the longer the travel, in order to achieve said unlocking of the frame-slide assembly.
  • the casing has a cover on top, fastened by means of interlocking tongues which, furthermore, make possible the removal of the cover, in order to access the center housing of the frame.
  • the auxiliary contact device of the invention is constituted from a casing 1 that is endowed with a center housing 2, in which a frame 3 is accommodated, which includes a clamp 4 at the bottom that is fastened by means of a pin determining the axis of revolution 5.
  • the clamp 4 is assisted by a spring 6 and has a crosspiece at the top, on which is located a cylinder 7 that turns freely and a leverlike extension 8.
  • the frame 3 is endowed on the side with a pulsator 9, in which a recess has been provided for a moving contact 11 for discharge of capacitors, as will be subsequently explained, which is assisted by a spring 10.
  • a slide 12 has been provided, which is endowed with recesses 13 accommodating moving contacts 14 assisted by a spring 15.
  • the slide 12 is endowed with fins 16 that are accommodated and guided in channels 19 provided in the center housing 2 of the casing 1.
  • the slide 12 is endowed with a hook 20 that is locked-unlocked in the cylinder 7 of the clamp 4 located in the frame 3, as will be subsequently explained.
  • the slide 12 is also endowed with a cylindrical receptacle 18 in which is inserted a spring 22 that runs through a hole machined in the frame 3 and is retained on a pin 34 provided at the bottom of the casing 1.
  • the casing 1 also houses a fixed contact 31 that is complemented by the moving contact 11 for discharge of the capacitors.
  • the casing is endowed with a lateral housing 29 accommodating a selector 25 that is endowed with claws 28 for retention in the lateral housing 29 and further including riblike projections 26, the fundamental characteristic of which is that each of said riblike projections 26 has different lengths determining different heights of the ribs, one of which must be located on the path to be traveled by the lever 8, so that, by means of the selector 25, it is possible to select which of the ribs 26 is the one situated on the path of the lever 8, as will be subsequently explained.
  • a pin 27 has been provided, which fixes one of the positions A, B or C of the selector 25, whose position depends on the contactor to which the selector is applied (the fact that one of the three ribs 26 is located on the path of the lever 8 being selected).
  • the lateral housing 29 is endowed with semicircular recesses 35 in which the pin 27 is retained, after selecting the proper position of the selector 25.
  • the casing 1 is closed at the top by means of a cover 21, for which it is endowed with tongues 32 that partially conceal the fixed contacts 30, so as to make possible the connection of the resistors.
  • the slide 12 has two stops 17 situated below the fixed contacts 30 of the casing, so as to limit the ascending travel of the slide 12, as will be subsequently explained.
  • the auxiliary contact device of the invention is mounted on a contactor 33 and, through resistors, protects the contactor from the high current peaks produced on closing the contactor, the activation of which connects an industrial installation with a capacitor battery in order to correct the power factor, the auxiliary contact device having means of coupling and fastening to the contactor, means which, in the working example, are determined by tongues 24 provided in the casing 1. It also has means of engagement of the moving contacts 14 to the traction gear of the moving contacts of the connector 33, means determined by a coupling 23 provided on the frame 3.
  • the fixed contacts 30 are connected to the fixed contacts of the contactor 33 through resistors, not represented on the figures, in order to provide the protection previously discussed, for which, in idle state of the contactor and, therefore, of the contactor of the auxiliary contacts, the slide 12 is joined to the frame 3, a situation in which the hook 20 is retained in the cylinder 7 of the clamp 4, and the slide-frame assembly is in an upper position produced by the action of the spring 22, which position is defined by the stop 17 of the slide, when the latter makes contact with the fixed contacts 30 of the casing 1 and, more concretely, with the fixed contacts 30 located in the center.
  • the contactor 33 When the contactor 33 is activated, it pulls on the coupling 23, so as to produce the descending displacement of the frame 3 and, therefore, of the slide 12 on being locked, as was explained.
  • the moving contact 11 as represented in Figure 7, is normally open and can be normally closed.
  • the selection of the position of the selector 25, in order to select which of the riblike projections 26 will be positioned on the path of the lever 8, depends on the size and, therefore, on the power of the contactor to which the device of the invention is applied.
  • the greater the size of the contactor the longer the travel, so that the rib 26 selected is the lowest one.
  • the springs 15 exert a greater pressure of the moving contacts 14 on the fixed contacts 30, determining means that increase the pressure of the connection, the longer the time it takes for disconnection, which facilitates a better conduction of the current peaks generated on the connection.
  • the selector 25 constitutes a means that regulates the time it takes to disconnect the auxiliary contact device after closing of the contacts of the contactor, in order to make possible their application to the whole range of powers for which the contactors 33 are designed, time further regulated by the pressure that must be exerted between the contacts, depending on the power of the contactor for achieving better conduction of the current peaks.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP98307773A 1997-09-24 1998-09-24 Dispositif de contacts auxiliaires pour le raccordement d'un contacteur avec correction de facteur de puissance Withdrawn EP0905732A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9701998 1997-09-24
ES009701998A ES2134153B1 (es) 1997-09-24 1997-09-24 Dispositivo de contactos auxiliares para conexion a contactores de correccion del factor de potencia.

Publications (2)

Publication Number Publication Date
EP0905732A2 true EP0905732A2 (fr) 1999-03-31
EP0905732A3 EP0905732A3 (fr) 1999-08-04

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ID=8300680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98307773A Withdrawn EP0905732A3 (fr) 1997-09-24 1998-09-24 Dispositif de contacts auxiliaires pour le raccordement d'un contacteur avec correction de facteur de puissance

Country Status (2)

Country Link
EP (1) EP0905732A3 (fr)
ES (1) ES2134153B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102768920A (zh) * 2012-04-05 2012-11-07 厦门宏美电子有限公司 一种常闭辅助触头模块及其单极交流接触器
WO2013164020A1 (fr) * 2012-05-02 2013-11-07 Siemens Aktiengesellschaft Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés
WO2016037731A1 (fr) * 2014-09-09 2016-03-17 Siemens Aktiengesellschaft Dispositif de commutation à bloc de commutation auxiliaire modulaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2021319A (en) * 1977-12-29 1979-11-28 Northern Eng Ind Electrical switches
WO1992006483A1 (fr) * 1990-09-27 1992-04-16 Telemecanique Dispositif de commutation comprenant un interrupteur auxiliaire a fonctionnement monostable couple a un interrupteur principal
US5194705A (en) * 1989-12-08 1993-03-16 Telemecanique Adaptation device effecting mechanical coupling between a contactor and auxiliary switches having different working strokes
DE29601735U1 (de) * 1995-06-09 1996-03-14 Sprecher & Schuh Ag Widerstandsanordnung zu einem zum Schalten von kapazitiven Lasten bestimmten elektromagnetischen Schaltgerät

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2021319A (en) * 1977-12-29 1979-11-28 Northern Eng Ind Electrical switches
US5194705A (en) * 1989-12-08 1993-03-16 Telemecanique Adaptation device effecting mechanical coupling between a contactor and auxiliary switches having different working strokes
WO1992006483A1 (fr) * 1990-09-27 1992-04-16 Telemecanique Dispositif de commutation comprenant un interrupteur auxiliaire a fonctionnement monostable couple a un interrupteur principal
DE29601735U1 (de) * 1995-06-09 1996-03-14 Sprecher & Schuh Ag Widerstandsanordnung zu einem zum Schalten von kapazitiven Lasten bestimmten elektromagnetischen Schaltgerät

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102768920A (zh) * 2012-04-05 2012-11-07 厦门宏美电子有限公司 一种常闭辅助触头模块及其单极交流接触器
CN102768920B (zh) * 2012-04-05 2014-08-20 厦门宏发开关设备有限公司 一种常闭辅助触头模块及其单极交流接触器
WO2013164020A1 (fr) * 2012-05-02 2013-11-07 Siemens Aktiengesellschaft Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés
WO2016037731A1 (fr) * 2014-09-09 2016-03-17 Siemens Aktiengesellschaft Dispositif de commutation à bloc de commutation auxiliaire modulaire
CN106663569A (zh) * 2014-09-09 2017-05-10 西门子公司 具有模块化辅助开关组的开关设备
CN106663569B (zh) * 2014-09-09 2018-11-09 西门子公司 具有模块化辅助开关组的开关设备
US10636589B2 (en) 2014-09-09 2020-04-28 Siemens Aktiengesellschaft Switching device with a modular auxiliary switching unit

Also Published As

Publication number Publication date
ES2134153A1 (es) 1999-09-16
EP0905732A3 (fr) 1999-08-04
ES2134153B1 (es) 2000-05-01

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