Classifications

• • 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

Definitions

• the present invention relates to an electrical appliance comprising a contactor shaped so as to be able receive a protection module against overvoltages and a protection module.
• such a protection module overvoltage is coupled to a contactor either for protect the contactor coil against overvoltages that can be generated between its terminals, i.e. for protect nearby electronic devices of the contactor against parasites generated by electromagnet operations.
• These protection modules are usually mounted on the contactors after wiring and commissioning, when the need arises.
• This solution also has the disadvantage of occupying a significant part of the space available at the level of contacts.
• FR 2 631 738 offers a module made up of two parallelepiped portions connected by a flat portion thin.
• the two parallelepiped portions are intended to be placed in cavities formed at this effect on either side of the front face of the contactor near the terminals of this one while the portion plane is positioned against said front face of the contactor.
• the protection module positioned on the contactor then extends beyond this front face of the contactor. It can advantageously be put in place or removed without require the displacement of neighboring contactors.
• the main disadvantage of this arrangement is due to the fact that when the module is positioned on the contactor, its two parallelepipedic portions are arranged in the channels allowing access to the screws fixing said contactor which requires dismantling the protection module when the contactor has to be moved.
• the present invention therefore tends to provide an apparatus comprising a designed contactor and protection module in such a way that it is always easy to climb or dismantle the protection module, the presence of this module not disturbing the interventions to be performed on this contactor.
• the invention provides an apparatus electric of the type comprising a contactor having a housing for the installation of a protection module and a protection module 3, said contactor comprising a base 10 on which are mounted the various electrical elements composing it and having feet 13 located at the four corners of its rear face for the installation of fixing screws, the space present above said feet 13 being left free to allow access to the fixing screws, said housing being provided on one of the walls of said contactor, and said module protection 3 being shaped so that the assembly formed by the contactor and the protection module that it carries does not exceed the volume defined upwards from feet 13 and leaves free breathing above said feet necessary for access to fixing screw, characterized in that said housing extends over the entire width of the wall of the base 10, and in that the protection module 3 comprises a housing 30 whose lateral faces 37 are arranged between the feet 13 of the contactor 1, so that said protection module is capable of being put in place, or extracted, by gripping on its lateral faces 37.
• the contactor has a base 10 in which are mounted the different electrical elements that make it up, mainly a coil and an electromagnet and a upper part 1 carrying the contacts.
• the contactor can be set up in an electrical mounting either by being positioned on a rail through opening 11, either by being fixed by screws passing through the holes 12 provided in the feet 13 located at the four corners of the rear face of the base 10. At this indeed, the space present above the feet 13 is left free to allow a tool access to said screws fixation.
• Areas 14 allowing the making of connections are arranged on the front side of two arms side 15 disposed on either side of a protuberance 17 central to the upper face of the base 10.
• the protrusion 17 extends forward relative to the upper wall 18 of the base while remaining in the volume defined upwards from feet 13, in considering these as the four corners of a base support.
• a thin wall 19 connects the feet 13.
• the upper face of the protrusion 17 and the free edge of the wall 19 are in the same horizontal plane at most arranged along the support base.
• pins 20 Two electrical contacts formed by pins 20 connected to the electrical connections 14 of the coil extend in the slots 16. These pins are visible in FIG. 1, in which we practiced a partial removal to better see the pin located on the right on this figure.
• These pins are arranged at a distance from the openings of the slots 16 facing up and forward so to avoid any risk of untimely contact during of interventions on the electrical assembly.
• the protrusion 17 has a notch 21 directed towards the wall 19.
• the wall 19 has two openings 22 arranged near the front wall 18. For reasons of ease of molding, these openings 22 are through in the example shown in the drawing.
• the conformation of the contactor which has just been described allows to reserve in the volume of the contactor, a space free between the protuberance 17 and the wall 19.
• This space free constitutes a housing for the installation of the module protection 3, said housing extending over the entire width of the wall of the base, here the upper face.
• the protection module 3 intended to be mounted on the contactor described above has a housing 30 of width equal to the free space in the transverse direction of the contactor between feet 13, slightly lower in height to the space separating the protrusion 17 from the wall 19 and of thickness equal to the distance between the front wall 18 the base of the front of the protrusion 17.
• This housing 30 is surmounted by two vertical arms 31 arranged above said housing and on either side of this one.
• the housing 30 is thus intended to be positioned between the protrusion 17 and the wall 19 without exceeding the volume defined upward by the feet.
• the lateral faces 37 of the housing 30 are arranged between the feet 13 of the contactor and go back to the vertical arms 31 which allows the box not to encroach on the space left free above said feet on the one hand leave access to the fixing screws, and on the other hand allow grasp the protection module by its side faces.
• the arms 31 are for their part intended to be positioned in the slots 16.
• Each arm 31 carries a contact tab 32 connected electrical elements arranged in the housing 30 and intended to be positioned against a pin 20 to establish the electrical connection between protection module 3 and the contactor coil.
• Means for attaching the protection module 3 to the contactor are provided between the upper faces 35 and lower 36 of the module and respectively the protuberance 17 and the wall 19.
• a flexible tongue 33 intended to cooperate with the notch 21 of the protuberance 17 is provided on the face upper 35 of the housing 30 disposed between the arms 31. This tab can be deleted by pressing in the direction of arrow A (figure 1).
• Two pins 34 intended to cooperate with the openings 22 of the wall 19 are formed on the underside 36 of the housing 30.
• the arms 31 are inserted into the slots 16 and the tongue 33 in the notch 21.
• the module is pulled up so as to erase the tongue 33 while being tilted so as to bring the face 36 of the housing above the wall 19.
• the protection module is thus applied against the wall side 18 of the contactor while being able to be grasped by its lateral faces 37.
• the wall 19 can be located at another level that in the drawings and the protrusion 17 can be of greater or lesser thickness.
• the protection module can be manufactured in such a way simple and economical by forming the housing 30 and the legs 31 in a hollow plastic part obtained by molding. In this hollow room, we have the circuit electric which must compose it provided with the tabs of contact 32, then we drown this circuit in a resin hardening which maintains the components and their resistance to shock and vibration.
• the front face of the hollow part is thus closed by the resin.
• This front face is arranged against the contactor and not visible from the outside which dispenses with a finish particular.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Switch Cases, Indication, And Locking (AREA)
• Casings For Electric Apparatus (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=9490852

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (4)

• 1996
  • 1996-04-03 FR FR9604162A patent/FR2747231B1/fr not_active Expired - Fee Related
• 1997
  • 1997-03-26 ES ES97400677T patent/ES2141585T3/es not_active Expired - Lifetime
  • 1997-03-26 EP EP19970400677 patent/EP0800192B1/fr not_active Expired - Lifetime
  • 1997-03-26 DE DE1997600762 patent/DE69700762T2/de not_active Expired - Lifetime
  • 1997-04-02 CN CN97103761A patent/CN1118080C/zh not_active Expired - Fee Related

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