Classifications

• • 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
  • H01H71/12—Automatic release mechanisms with or without manual release
  • H01H71/24—Electromagnetic mechanisms
  • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
• • 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
  • H01H73/02—Details
  • H01H73/04—Contacts
  • H01H73/045—Bridging contacts

Definitions

• the invention relates to an installation switching device with a double break according to the preamble of claim 1.
• Generic installation switching devices such as motor protection switch, have at least one Polstrompfad, comprising two fixed contacts and two arranged on a movable contact bridge, movable contact pieces through which a pole switch with two contacts and double interruption is formed.
• the contact bridge can be acted upon by a pusher in the opening direction and by a contact pressure spring in the closing direction. When switched on, the two contacts are closed. In the event of a short circuit, the contact bridge is pushed into its opening direction and the pusher is moved into its release position, in which this acts on the contact bridge opening.
• generic installation switching devices include an electromagnetic release whose armature unlocks the Verklinkungsstelle a switching mechanism when a short-circuit current in the Polstrompfad so that this trailing the trigger from its rest position to its off position and thereby moving from its rest position to its off position effective lever the pusher holds in its release position and thus the contact bridge is permanently opened against the contact pressure spring.
• the active lever hurries for permanent keeping open of the contacts through the switch lock the pusher movement after. Because after unlatching the switching mechanism, it takes a certain time until the active lever is acted upon by the switching mechanism in the opening direction, and then again passes a certain amount of time until the active lever has traveled the designated as tripping distance between its rest position and its point of attack on the pusher , For design reasons, a certain trip path of the action lever is unavoidable, since the pusher and the active lever at rest require a certain amount of play. Under unfavorable conditions, it may happen that the contacts have already been closed again by the contact pressure spring before the switch lock can cause a permanent opening via the active lever and the pusher. One then speaks of the occurrence of a contact bounce, which is undesirable.
• the installation switching device comprises a displaceably mounted between a release position and a locking position spool, which holds the pusher in its release position in its locking position, wherein the movement of the action lever from its rest position in its off position a shift of the spool from its locked position to its release position causes, so that then the movement of the pusher is released from its release position.
• the service switching device requires only an additional component or an additional module, namely the spool, so that an easy to install and cost-effective solution is achieved.
• the active lever is mounted in a fixed axis of rotation, acting as a reversing lever toggle lever with a first and a second lever arm.
• the second lever arm of the action lever in the switch-off position of the active lever, is coupled to the pusher so that it can hold it in its release position.
• control slide is held by the pusher in its release position in the on state, and in the case of short circuit, the displacement of the spool is released into its locking position as a result of the movement of the pusher in its release position.
• the spool can be designed as a diaphragm with an opening, wherein in the locking position, the aperture blocks the movement of the pusher from the triggering out, and in the release position, the opening releases the displacement of the pusher from the triggering out position.
• the spool or the diaphragm can be coupled to the active lever via a spring, so that the displacement of the control panel between the release and the locking position is controlled by the spring coupling with the active lever.
• the control lever is hinged to the control lever in the rest position of the active lever in the direction of its locking position acting spring.
• the spring may be a bent leaf spring.
• the spool of the invention is designed as a shutter and is in the release position, the shutter is penetrated by the pusher in its opening, whereby a sliding movement of the shutter is blocked by the pusher. At the same time the shutter is in its release position when the active lever is in his Resting position is applied by mechanical coupling towards their locking position with a force.
• the pusher As soon as the pusher is beaten into its release position by an electromagnetic release by the armature of the electromagnetic release or by an electrodynamic repulsion between the fixed and the movable contact pieces, it leaves the area of action of the aperture of the aperture and releases it. Under the influence of the mechanical coupling with the active lever, the diaphragm can now move into its locking position.
• the spring which produces the coupling between the active lever and the control panel, a bent leaf spring.
• the active lever can be in a very advantageous embodiment of the invention in a fixed rotational axis mounted toggle lever with a first and a second lever arm, which acts as a lever.
• the first lever arm is acted upon by the switching mechanism, the second lever arm can hold the pusher on a shoulder in its trigger position.
• the direction in which the force pulse is transmitted from the Lock acts, forms an angle with the direction of movement of the pusher.
• the reversing lever thus deflects the direction of action of the switching mechanism in the direction of movement of the pusher.
• FIG. 1 shows a functional diagram of an installation switching device according to the invention according to a first embodiment with a diaphragm in its release position
• FIG. 2 shows a functional diagram of the service switching device according to FIG. 1 shortly after the occurrence of a short-circuit current
• FIG. 3 shows a functional diagram of the service switching device according to FIG. 1 while inhibiting the return movement of the pusher, through the panel in its locking position, FIG.
• FIG. 4 shows a functional diagram of the service switching device according to FIG. 1 with permanent opening through the switch lock via the active lever, FIG.
• FIG. 5 shows a schematic representation of a second embodiment with a control slide, which is guided on the underside of the second lever arm of the active lever, in its release position, FIG.
• FIG. 6 shows a representation of the embodiment according to FIG. 5, with the return movement of the pusher being inhibited by the control slide in its locking position
• FIG. 7 a representation of the embodiment according to FIG. 5, with permanent opening through the switch lock via the active lever
• 8 shows a schematic representation of a third embodiment with a control slide, which is guided on the underside of the second lever arm of the active lever, in its release position
• FIG. 9 shows an illustration of the embodiment according to FIG. 8, while inhibiting the return movement of the pusher, by the control slide in its
• FIG. 10 a representation of the embodiment according to FIG. 8, with permanent opening through the switch lock via the active lever,
• FIG. 11 shows a schematic illustration of a fourth embodiment with a control module which comprises a control slide, in its release position
• FIG. 12 shows an illustration of the embodiment according to FIG. 11, with the return movement of the pusher being inhibited by the control slide in its locking position
• FIG. 13 shows an illustration of the embodiment according to FIG. 11, with permanent opening through the switch lock via the active lever, as well as
• FIG. 14 shows a schematic illustration of the control module of the embodiment according to FIG. 11.
• FIGS. 1 to 4 will be considered.
• FIG. 1 shows an inventive installation switching device 1 with a Polstrompfad 2 between an input terminal 3 and an output terminal 4. It could for example be a Polstrompfad a three-pole motor protection switch, the other two Polstrompfade are constructed accordingly.
• the Polstrompfad 2 comprises two fixed contact pieces 5.6 and two arranged on a movable contact bridge 7 movable contacts 8.9, through which a contact point 10 is formed with double interruption.
• the contact bridge 7 is acted upon by a contact pressure spring 11 in the closing direction, see directional arrow S.
• a pusher 12 which acts on the side of the contact bridge 7 opposite the contact pressure spring 11 and carries an extension on its narrow side opposite the contact pressure spring 11, which forms a striking pin 20, it can be acted upon in the opening direction, see directional arrow O.
• the Polstrompfad 2 still includes a thermal release 113 and an electromagnetic release 13 with an armature that hits the contact bridge 7 in the opening direction in the event of a short circuit current occurring in the Polstrompfad 2 due to an electrodynamic recoil over the pusher 12, indicated by the action line 14.
• the armature of the electromagnetic release 13 in the event of a short circuit on a switching mechanism 15 and unlatched Verklinkungsstelle, indicated by the action line 16, so that the switching mechanism 15 in the unlatched state via an active lever 17, indicated by the action line 18, the pusher 12 permanently in the opening direction the contact bridge 7 acted upon.
• thermal release 113 which also acts on the switching mechanism 15 in the case of an overcurrent, indicated by the action line 114, is known in principle.
• the mechanical system comprising the switching mechanism 15 and the active lever 17 may, for example, be a toggle lever system with a two-stage lock.
• the active lever 17 is designed as a double-arm lever, the first, acted upon by the switching mechanism 15 lever arm 171 and the second, cooperating with the pusher 12 lever arm 172 form an obtuse angle with each other and rotatably supported in a stationary axis of rotation 173, whereby the active lever 17th acts as a lever.
• the mechanical system just described has a certain mechanical inertia, whereby a certain amount of time, for example 2 ms, would pass after the unlatching of the switching mechanism before the active lever 17 strikes the pusher 12 with the free end of its second arm 172 permanently in the opening direction apply.
• a certain amount of time for example 2 ms
• the time to direct strike of the contact bridge 7 by the armature of the electromagnetic release 13 is much shorter, it is for example only 1 ms.
• the pusher 12 is a total of an elongate member having approximately a cylindrical basic shape. He could also have a roughly cuboid basic shape. It comprises a main body and a striking pin 20 firmly molded thereto.
• an upper stop 23 is formed for the contact bridge 7.
• the pusher 12 has a shoulder 24 forming a lower stop for the free end 174 of the second lever arm 172 of the action lever 17.
• the slide can be made in one piece with the striker 20 or the aforementioned slot as an injection molded part. However, it could also consist of two parts, in the simplest case of a lower part and a head screw screwed into this lower part, which then acts as a striking pin with guide shoulder.
• a control slide in the form of a diaphragm 30 is mounted, which has an opening 32 which, in the closed position of the pusher 12, see Figure 1, the striker 20 of the pusher 12 includes.
• the diaphragm 30 is mounted longitudinally displaceable in approximately perpendicular to the longitudinal direction of the pusher 12. In the closed position of the pusher 12 shown in FIG. ne possible sliding movement of the aperture 30 blocked by the striker 20 of the pusher.
• the leaf spring 34 is mounted between the second lever arm 172 of the active lever 17 and the diaphragm 30 in such a way that in the rest position of the active lever 17, as shown in FIG. 1, the diaphragm 30 is actuated in the direction of the active lever 17. suggests, indicated by the directional arrow P.
• the latch mechanism After expiry of the inertia-related delay time, the latch mechanism, after releasing its latching mechanism, exerts a force K on the first lever arm 171 of the action lever 17 via a mechanical device known per se, see FIG. 4, whereby it is rotated clockwise relative to its starting position.
• the second lever arm 172 of the action lever 17 strikes with its free end on the shoulder 24 of the pusher 12. Now, the active lever 17 takes over the permanent hold down of the pusher 12 in its trigger position.
• the mechanical coupling between the diaphragm 30 and the active lever 17 could also be realized so that in the rest position of the active lever 17, the diaphragm 30 is acted upon in a direction away from the active lever 17 direction.
• the timing in the interaction between the aperture 30, the pusher 12 and the active lever 17 could also be designed so that the striking pin 20 penetrates a small distance into the opening 32 before the active lever 17 has been pivoted clockwise so far that its second Lever arm holds the pusher 12 permanently in its trigger position.
• FIGS. 5 to 7 will now be considered.
• This embodiment differs from that of Figures 1 to 4, characterized in that a spring-loaded slide 1030 is used as a control slide instead of a control panel on the underside of the second lever arm 172 of the action lever 17, which causes the locking of the pusher.
• a spring-loaded slide 1030 is used as a control slide instead of a control panel on the underside of the second lever arm 172 of the action lever 17, which causes the locking of the pusher.
• To the bottom of the second lever arm 172 are grooves (not shown in the figures), in which the slider body 1030 can move.
• the slider body 1030 is also connected by means of a compression spring 42 with the active lever 17.
• the compression spring 42 pushes the slider body 1030 toward the free end of the second lever arm 172 of the action lever 17 back.
• the slider body 1030 carries a slide nose 1032, as well as a laterally projecting pin 40 on both sides, that is, in the illustration according to FIGS. 5 to 7, protruding out of the plane of the drawing.
• This results in an assembly comprising the active lever 17, the compression spring 42 and the slider body 1030.
• This assembly can be pre-assembled and used as a subunit in the service switching device 101.
• the pusher body 12 has at the contact pressure spring 11 opposite narrow side a first shoulder 24, here also referred to as the first paragraph 24, and about a second shoulder 48, here also referred to as the second paragraph 48, on.
• the striker 20 connects.
• a guide member 44 is mounted, which has a control surface 46 in the form of a slope, which, starting approximately from the slide nose 1032, extends obliquely in the direction of the contact point 10 and the axis of rotation 173.
• the guide member may be attached to an inserted into the service switching device and held therein adapter or as Anformung on the housing inner wall.
• the active lever 17 In the closed position shown in Figure 5, the active lever 17 is in its rest position, and the slider body 1030 is connected to the slide nose 1032 by the bias of the compression spring 42 to the pusher body 12 at.
• the contact point is located below the first paragraph 24.
• the movement of the pusher 12 from the closed position in its release position is not hindered by the slider body 1030.
• the slider body 1030 is in Fig. 5 in its release position.
• the spool 1030 with the slide nose 1032 on the second shoulder 48 blocks the return movement of the spool 12.
• the upper stop 23 then also causes the movement Contact bridge held in its open position. This position is shown in FIG. 6.
• the opening travel of the contacts ie the distance between the fixed and the movable contact piece with the contact point open, is determined by the position of the second shoulder 48 on the pusher 12. The closer the second shoulder 48 is set to the upper end face at the free end of the striker pin 20, the greater the opening path of the contact point.
• the second shoulder 48 coincides with the upper end face at the free end of the striker pin 20.
• the pusher could also no longer have a second shoulder 48.
• the blocking of the pusher 20 by the spool 1030 then takes place at the upper end face at the free end of the striker pin 20.
• the opening travel of the contacts is then maximally large.
• the active lever 17 is rotated about the axis of rotation 173 in a clockwise direction relative to its starting position in its off position.
• the second lifting arm 172 of the action lever strikes with its free end on the first shoulder 24 of the pusher 12. Now, the active lever 17 takes over the permanent hold down of the pusher 12 in its trigger position and thus the holding open the contact point 10th
• the active lever 17 is again rotated counterclockwise back to its rest position.
• the plunger 12 follows the active lever while up, and the contact bridge is pressed by the contact pressure spring 11 back into its closed position.
• the spool 1030 is then back to the pusher 12 below the first shoulder 24, so that the position shown in FIG 5 is reached again.
• a spring-biased slide 1030 is inserted on the underside of the second lever arm 172 of the action lever 17, which causes the locking of the pusher.
• To the bottom of the second lever arm 172 are grooves (not shown in the figures), in which the slider body 1030 can move.
• the slider body 1030 is also connected by means of a compression spring 42 with the active lever 17.
• the functional effect of this embodiment largely corresponds to that described in FIGS. 5 to 7.
• the difference from the embodiment according to the figures 5 to 7 is that the movable coupling between the spool 1030 and the control surface 46 of the guide member 44 via a guide ramp 50 on the underside of the spool 1030, see FIGS. 9 and 10.
• the spool 1030th carries no laterally projecting pins more. This 1030 place won laterally of the spool.
• the service switching device 101 comprises a separate control assembly 1040, which is inserted between the active lever 17 and the pusher 12 in the device.
• the control assembly 1040 includes a frame 54, which serves as a support member for a longitudinally displaceably mounted in the frame spool 1030.
• the direction of displacement of the spool 1030 runs approximately parallel to the contact bridge and approximately perpendicular to the pusher 12.
• the spool is connected to a compression spring 42 with the frame 54, so that the compression spring 42 pushes the slider body 1030 in the direction of the pusher 12 back.
• the slider body 1030 carries a slide nose 1032, which passes through the frame 54 in the direction of the pusher 12 through a lateral opening.
• the spool 1030 carries on its side facing the active lever 17 side a guide ramp 50. This forms a sloping towards the slide nose 1032 inclined plane.
• the second lever arm 172 of the action lever 17 carries on its side facing the spool 1030 a bulge 52, which may also be referred to as a cam or control extension.
• the bulge 52 is mounted so that it can enter into a movable coupling with the guide ramp 50 of the spool 1030 upon pivoting of the action lever 17 in a clockwise direction.
• the pusher body 12 has, on the narrow side opposite the contact pressure spring 11, a first shoulder 24 and above a second shoulder 48. At the second paragraph 48, the striker 20 connects.
• the active lever 17 In the closed position shown in FIG. 11, the active lever 17 is in its rest position, wherein in this position it is inclined slightly upwards relative to the direction of displacement of the spool 1030.
• the slider body 1030 abuts the pusher body 12 with the slider nose 1032 by the bias of the compression spring 42.
• the contact point is located below the first paragraph 24.
• the movement of the pusher 12 from the closed position in its release position is not hindered by the slider body 1030.
• the slider body 1030 is in Fig. 11 in its release position.
• the contact bridge in the opening direction in the illustration of FIGS. 11 to 13 down, moved and the pusher 12 is moved to its release position, also down.
• the movement of the contact bridge can be done either due to electrodynamic repulsion of the fixed and movable contact points or due to the action of the impact armature of the electromagnetic release on the striker 12.
• the second shoulder 48 a clearance is created between the slide nose 1032 and the striking pin 20, into which the pressure spring 42 presses the slider body 1030 with the slide nose 1032.
• the sliding nose 1032 is therefore in contact with the striking pin 20 above the second shoulder 48. He is then in his locked position.
• the active lever 17 initially remains in its rest position due to the mechanical inertia already described above.
• the active lever 17 is rotated about the axis of rotation 173 in a clockwise direction relative to its starting position in its off position.
• the second lever arm 172 of the action lever meets with its free end on the first shoulder 24 of the Pusher 12. Now takes over the active lever 17, the permanent hold down the pusher 12 in its trigger position and thus the holding open the contact point 10th
• the active lever 17 is again rotated counterclockwise back to its rest position.
• the plunger 12 follows the active lever while up, and the contact bridge is pressed by the contact pressure spring 11 back into its closed position.
• the spool 1030 is then back to the pusher 12 below the first shoulder 24, so that the position of FIG 11 is reached again.
• FIG. 14 shows a possible embodiment of a control module 1040.
• the approximately rectangular frame 54 in which three mutually parallel recesses 1042, 1043, 1044 are introduced, can be seen.
• Each of the recesses 1042, 1043, 1044 is used for slidably receiving a control slide, wherein in FIG. 14 only in the recess 1042 a spool 1030 and in the recess 1044, a spool 1031 are shown.
• the three control slides are correspondingly assigned to a Polstrompfad in the service switching device.
• the active lever 17 can be configured as a single active lever which carries a common first lever arm 171 and a number of second lever arms 172 corresponding to the number of Polstrompfaden.
• the spool 1030 is slidably held in side guide grooves 1046 in the recess 1042.
• the compression spring is not shown, it is to be inserted into the free space between the rear wall 1048 and the spool 1030 in the recess 1042.
• the slide nose 1032 carries a semicircular recess 1033 so that it has approximately a bifurcated shape.
• the semicircular recess 1033 is adapted to the diameter of the striker pin 20 of the pusher 12, so that it can be better kept in the locking position shown in FIG 12.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Lock And Its Accessories (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Switch Cases, Indication, And Locking (AREA)
• Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)

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• 2006
  • 2006-12-07 DE DE102006057647A patent/DE102006057647A1/de not_active Withdrawn
• 2007
  • 2007-12-06 DE DE502007004431T patent/DE502007004431D1/de active Active
  • 2007-12-06 WO PCT/EP2007/010606 patent/WO2008068020A2/fr active Application Filing
  • 2007-12-06 EP EP07856411A patent/EP2087500B1/fr not_active Not-in-force
  • 2007-12-06 DE DE102007059017A patent/DE102007059017A1/de not_active Withdrawn
  • 2007-12-06 AT AT07856411T patent/ATE474322T1/de active
  • 2007-12-06 DE DE102007059043A patent/DE102007059043A1/de not_active Withdrawn

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