Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
  • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
  • H01H73/42—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by rotatable knob or wheel
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/50—Manual reset mechanisms which may be also used for manual release
  • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel

Definitions

• the invention relates to an electromagnetic switching mechanism, insbeson ⁇ shear and free particular for mobile electric circuit protection devices with manual, electromagnetic ⁇ tripping of the contact opening, according to the preamble of the on ⁇ claim 1.
• An electromagnetic switching mechanism for mobile electrical protective switching devices with differential current and undervoltage tripping is described in DE 39 37 546 AI.
• This mechanism has a contact carrier for the movable contacts, which is held in a variable and pivotable manner on a development of a magnetic yoke of a release coil in an elongated hole guide and which is acted upon by a switching spring, and a hinged armature which is arranged on the magnetic yoke and is tension spring-loaded and which can be actuated simultaneously by an operating handle and against it Effect of the respective spring can be latched together, as well as fixed contacts.
• the trip coil is connected to electronics arranged on a printed circuit board with a summation current converter for residual current and undervoltage monitoring and a test device.
• Another switching mechanism for protective switching devices is known from DE 41 22 268 AI.
• this has a multi-armed shift lever which is arranged in an elongated hole guide against the force of a tension spring and is adjustable and has a multi-armed latch lever which is rotatably mounted thereon.
• This is connected on one of its arms to form a knee joint with a support lever arranged on an operating handle, acted upon on a second arm by a trigger element and can be brought to a stop on a housing projection with a further, third arm.
• the switching lever is arranged with one arm acting on a swivel contact acted upon by compression springs.
• the invention has for its object to provide an electromagnetic switching mechanism for electrical protective switching devices with manual, electromagnetic and free triggering of the contact opening, which can be made compact as an assembly and suitable for protective switching devices of smaller dimensions and whose assembly effort is relatively low.
• the object is achieved in an electromagnetic switching mechanism according to the preamble of claim 1 by its characterizing features.
• the advantage of the solution according to the invention is that the switching mechanism arranged on a holding part around the shaft of an operating handle designed as a rotary handle is compact and reliable and can be preassembled into a module.
• the function of said elements are at the DER Vor ⁇ or upper side of the support member and the stationary contacts and the contact carrier ⁇ with the movable contacts on the back or bottom locatable.
• the tendon is designed so that when the armature is in contact with the electromagnet, when the rotary handle is rotated and thus the angular position of the articulation axis changes, it can be rotated around the armature actuating element while moving the actuating element of the contact carrier, in a region which is caused by the Switch positions "On” and “Off” of the contact carrier and the resulting positions of this actuator is given.
• the clamping member In the "on" switch position, the clamping member is fixed to the actuating element when the contacts are closed under the pressure of the switch spring and in the angular position of the articulation axis given in this switch position, and from this position with the armature tearing off the electromagnet under the pressure of the switch spring rotatable about the articulation axis.
• the switching mechanism is particularly suitable for mobile protective switching devices, since it fulfills the requirement for small dimensions in these devices in an outstanding manner.
• this allows the force of the switching spring acting on the actuating element of the contact carrier to be transmitted to the armature in different directions and strengths depending on its position relative to the shaft of the rotary handle, such that in the switching position "on” one against the force acting on the armature of the electromagnet acts on it and predominates when the electromagnetic force is reduced, so that the triggering, ie the opening of the switch, is effected.
• the measure according to claim 4 serves in a simple manner to facilitate the relative movement between the actuating elements and the tensioning member and a defined power transmission.
• the design of the armature according to claim 7, like the measure according to claim 8, serves to increase the sensitivity of the switching mechanism to occurring fault currents and undervoltage.
• FIG. 1 is a top view of a switching mechanism according to the invention mounted in a housing
• Fig. 3 is a plan view of the contact arrangement below the bracket ⁇ part
• Fig. 6 shows the switching mechanism in the switch position "free trip".
• the electromagnetic switching mechanism shown in plan view in FIG. 1 has a holding part 1, on which the shaft 2 of a twist grip 2a with a crank 3 is mounted centrally. On this crank 3 is the one leg of a two-leg tendon surrounding the shaft 2 in an approximately U-shaped manner
• the tendon 4 has an elongated hole-like recess 5 at the end of its other leg and a three-sided recess 6 between this and the shoulder of this leg, the flanks 7 and 8 of which face one another and form an approximately right angle.
• the recess In the recess
• a cylindrical actuating element 10 is movable relative to the latter arranged.
• This actuating element 10 is arranged at an arm of an anchor 9 formed as sau ⁇ armed lever, which is superimposed on the supporting member 1 on its pivot axis by means of a zylinderför strength attachment 11 pivotally ge ⁇ .
• the end portion of the other arm is located in the area of influence of a likewise arranged on the mounting part 1 the electromagnet 12, the existing plastic armature 9 has in this area a with buoysgra ⁇ acted upon iron plates 12a having a contact surface 12b for the electromagnet 12th
• the armature 9 is designed so that the pivot axis B outside through the iron plate 12a and the Actuate the ⁇ restriction member 10 extending straight lines and on the shaft arranged 2 facing An ⁇ kerseite zwi ⁇ chen the Betchanist ⁇ element 10 and the shaft 2 in a Ab ⁇ tand of this line which corresponds to a fifth of the distance between the actuating element 10 and the iron plate 12a.
• the actuating element 13 of a contact slide 14 arranged on the underside of the mounting part 1, which - like the contact slide 14 - is tangential to the shaft 2 at a distance is movable to the latter, the path of movement of this actuating member 13 being essentially parallel to the connecting line between the pivot axis B and the shaft 2 and perpendicular to the armature arrangement.
• the actuating element 10 is located both in the region between the movement path of the actuating element 13 and the pivot axis B and also in the region between the latter and the electromagnet 12.
• Fixed contacts 19 are detachably held on the underside of the mounting part 1 between molded mounting elements 16 and 17, fixed by compression springs 18 (FIG. 2).
• the spacing of the fixed contacts 19 are secured ⁇ slide 14 between the corresponding receiving elements 20 and 20a, the bewegba ⁇ ren switch contacts 21 on the contact.
• the contact slide 14 is slidably mounted a U-section whose opening faces the mounting part 1, and is fixed to the latter by means of secondary there ⁇ two pairs of Henen verse-with latching noses latching elements 22 ver ⁇ .
• the range of movement of the contact slide 14 is predetermined by the switch positions "on” and “off” of the movable switch contacts 21, that is to say by the position in which the switch contacts 21 contact the fixed contacts 19 and by a position in which the switch contacts 21 have a predeterminable distance from the fixed contacts 19, in which an electrical contact is no longer provided.
• the contact slide 14 has a laterally arranged locking part 23 for a compression spring (switching spring) 24, which is supported at the other end on an element 25 formed on the mounting part 1 and which acts on the latter against the closing direction of the switching contacts 21.
• the actuating element 13 is also arranged on the locking part 22 which projects through the opening 15 to the upper side of the holding part 1 and engages there with the three-sided recess 6 of the tensioning element 4.
• the contacts 19 and 21 are connected to flexible electrical lines 26 which lead to the electrical connections (plugs, sockets) of the protective switching device.
• the tripping coil 27 of the electromagnet 12 and a summation current transformer 30 are provided with an electronic device arranged on a circuit board. circuit arrangement 29 connected.
• the electronic circuit arrangement and thus the Au ⁇ lösespule 27 of the electromagnet 12 is a disposed on a movable contact 21 auxiliary contact 28, the clock with a Gegenkon ⁇ 28a contactable provided with the necessary supply voltage, where ⁇ in the closed position these contacts before reaching the " A "switch position of the contact slide (14) is given.
• the electronic circuit arrangement 29 is now able to process fault currents and undervoltage in a known manner and to change the magnetic field on the electromagnet 12.
• the switching mechanism is brought into the "off” switching position by turning the twist grip 2a counterclockwise to a stop corresponding to this switching state.
• the articulation axis A of the tendon 4 is also rotated counterclockwise around the shaft 2, as a result of which the armature 9 is brought into contact with the electromagnet 12 as a result of the change in position of the recess 5 which causes the actuating element 10 to move becomes.
• the force acting on the armature 9 on the actuating element 10 in this switching position is directed in such a way that it presses it against the electromagnet 12.
• the switching mechanism can be brought from this position into the switching position "on” by turning the twist grip 2a clockwise by 90 degrees.
• the clamping member 4 is rotated about the fi xed actuating element 10 in such a way that the actuating element 13 is shifted against the force of the switching spring 24 into the switching position “on”, in which the movable switching contacts 21 arranged on the contact slide 14 contact the fixed contacts 19 and the Switch is thus closed.
• the elec Tronic circuit arrangement 29 is connected via the auxiliary contact 28 arranged on the contact slide 14 and a magnetic field is built up on the electromagnet 12.
• the direction and size of the force of the switching spring 24 acting on the actuating element 10 and transmitted via the tension member 4 have changed.
• the system is self-locking in this position. Verrin ⁇ the holding force Gert de ⁇ electromagnets 12, the armature by the switching spring 24 for opening of the contacts 19/21 on the actuating element 13 and is acted upon by these spring elements clamping member 4 and Betchani ⁇ is restriction member pushed away 10 via diese ⁇ by the electromagnet 12, wherein the tendon 4 is rotated about its articulation axis A.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Breakers (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Electromagnets (AREA)
• Switch Cases, Indication, And Locking (AREA)
• Resistance Welding (AREA)
• Flanged Joints, Insulating Joints, And Other Joints (AREA)
• Emergency Protection Circuit Devices (AREA)
• Push-Button Switches (AREA)
• Switches With Compound Operations (AREA)
• Keying Circuit Devices (AREA)
• Mechanisms For Operating Contacts (AREA)
• Gas-Insulated Switchgears (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=6485318

Family Applications (1)

Country Status (10)

Families Citing this family (4)

Family Cites Families (8)

• 1993
  • 1993-04-10 DE DE4311958A patent/DE4311958C2/de not_active Expired - Fee Related
• 1994
  • 1994-01-19 CN CN94191736A patent/CN1036812C/zh not_active Expired - Fee Related
  • 1994-01-19 WO PCT/EP1994/000125 patent/WO1994024689A1/fr active IP Right Grant
  • 1994-01-19 EP EP94905088A patent/EP0693220B1/fr not_active Expired - Lifetime
  • 1994-01-19 AU AU58847/94A patent/AU678206B2/en not_active Ceased
  • 1994-01-19 AT AT94905088T patent/ATE145759T1/de not_active IP Right Cessation
  • 1994-01-19 DE DE59401167T patent/DE59401167D1/de not_active Expired - Fee Related
  • 1994-01-19 DK DK94905088.4T patent/DK0693220T3/da active
  • 1994-04-07 TR TR00371/94A patent/TR28262A/xx unknown
• 1995
  • 1995-10-09 FI FI954797A patent/FI111766B/fi not_active IP Right Cessation
  • 1995-10-10 NO NO954024A patent/NO306839B1/no unknown

Non-Patent Citations (1)

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