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
  • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
  • H01H71/462—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts housed in a separate casing, juxtaposed to and having the same general contour as the main casing
• • 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

Definitions

• the invention relates to an additional switch for mounting on electric circuit breakers with two movable, electrical contacts, each of which is assigned two fixed, electrical contacts, with a signal lever and a contact lever which move the movable contacts, with an actuating button which is connected to the actuating button of the circuit breaker can be connected and which actuates the signal lever and the contact lever, with a pawl support which can be connected to the switching mechanism of the circuit breaker, for triggering the signal lever and / or the contact lever, with a lock which prevents the movement of the signal lever can if the additional switch is triggered via the actuating button, the actuating button being connected to the contact lever via a toggle lever, and wherein one arm of the toggle lever is formed by a pawl which hooks into the pawl rest when the additional switch is switched on.
• Such an additional switch is known from EP-A 394 144.
• a disadvantage of this additional switch is that the signal function, i.e. the signal lever cannot be deactivated if this is desired.
• the present invention is therefore based on the object of providing a generic additional switch in which the signal function can optionally be switched on and off.
• This object is achieved in that the lock is mounted on the housing and that the lock can be moved by the toggle lever from the position preventing the triggering of the signal lever when the additional switch is actuated by the circuit breaker via the clinch rest.
• a lock is provided which is mounted separately in the housing and cooperates functionally with and from the toggle lever the locked position is moved for the signal lever when the circuit breaker responds due to an error condition and triggers the additional switch via the jack support.
• a possibility can be provided to disable the lock so that the signal lever is always moved simultaneously with the contact lever in every operating state.
• this can be done in that the lock has an actuating lever to which an actuating device fixed to the housing is assigned, by means of which the lock can be fixed in a position in which it cannot lock with the signal lever.
• FIG. 1 shows an additional switch according to the invention with the top shell removed in the "electrical" OFF position caused by a fault condition in the circuit breaker
• FIG. 3 shows the additional switch of FIGS. 1 and 2 in the "manual" OFF switch position
• FIG. 4 shows the switch of FIG. 3 in the ON position
• Fig. 5 shows the switch in the ON position with the signal lever shown in the removed position and the
• FIG. 6 showing a jack support
• Fig. 12 shows an eccentric shaft
• Fig. 13 a pawl
• Fig. 14 shows a test button.
• FIG. 1 and 2 show an embodiment of an additional switch according to the invention, which has two housing shells, namely a lower shell 1 and an upper shell 2, the upper shell 2 being removed in FIG. 1.
• the housing of the additional switch has half a module width, i.e. half the width of the housing e.g. a circuit breaker to which it can be attached.
• the additional switch has two centering sleeves 23 and bores for three self-tapping screws 24.
• the additional switch has a pair with three connection terminals 25, 26, 27 and 28, 29, 30, the connection terminals 25, 26 and 28, 29 being electrically connected to contacts 31, 32 and 33, 34 fixed to the housing .
• the terminals 27 and 30 are electrically connected to movable contacts 35 and 36.
• the switching mechanism of the additional switch has a signal lever 5 and a contact lever 4, which are mounted on a common axis 36 in the housing. On the same axis 36 and between the signal lever 5 and the contact lever 4, a pawl support 6 is mounted, which can be connected via a bolt 21 or 21 'to the switching mechanism of the electrical circuit breaker. Depending on whether the additional switch is to be arranged on the left or right side of the circuit breaker, the bolt 21 or 21 'which is not required is removed on the opposite side.
• the contact lever 4 is connected via a knee joint consisting of a pawl 7 and a bracket 11 to an actuating button 3, which in turn can be connected to the actuating button of the circuit breaker via a button bolt 22.
• the pawl 7 is connected on the one hand to the bracket 11 and on the other hand to the contact lever 4 via a joint 12 (FIG. 5).
• a button spring 17 is also assigned to the actuating button 3, which is supported with one leg by means of a test button 9 on the lower shell 1 and with the other leg on the actuating button 3 and loads it in the counterclockwise direction, that is to say into the exhibition is shown in Fig. 1.
• 5 shows an embodiment of the additional switch which corresponds essentially to FIG. 1, in which the signal lever 5 is shown in the removed position and which shows the additional switch in the ON position.
• the pawl support 6, which is loaded by a support spring 18 in the counterclockwise direction, hooks with the pawl 7 and prevents the knee joint consisting of pawl 7 and bracket 11 under the load of a tension spring 16 with one end 37 on one Housing projection 38 and engages with its other end 39 on a shoulder 40 on the contact lever 4, bends outwards or upwards.
• a projection 41 with two bores 42 and 43 is provided on the pawl support 6, the suitable bolt 21, 21 'for connection to the respective circuit breaker being inserted into one of these bores 42, 43.
• the bolt 21 or 21 'then protrudes through circular segment-like slots 44 in the carrier 4 or 45 in the signal lever 5 and through corresponding slots in the upper shell 2 or the lower shell 1 to the outside and through corresponding recesses in the circuit breaker and is connected there to its switching mechanism.
• a latching projection 50 Arranged on the signal lever 5 is a latching projection 50 which interacts with the latching projection 51 of a lock 8, i.e. hooked with it when the signal lever 5 has reached its ON position (see FIG. 4).
• the lock 8 is pivotally mounted on a bearing 49 which is fixed to the housing and is biased counterclockwise by a compression spring 19 between an actuating lever 62 of the lock 8 and a receptacle 53 fixed to the housing.
• the lock 8 finally has a release lever arm 54, which has an angled portion 55 at its end, which interacts with the toggle lever consisting of the pawl 7 and bracket 11, such as 4 and 5 can be seen.
• the circuit breaker is "electrically" as described above, ie triggered by a fault condition in the circuit to be protected by the circuit breaker, its switching mechanism actuates the circuit breaker Pawl support 6 counterclockwise, whereby the knee lever 7, 11 bends upwards and the lock 8 rotates clockwise via the attachment 55 on the lever 54, so that the latching connection 50, 51 between the lock 8 and the signal lever 5 is released even before the signal lever 5 can rotate together with the contact lever 4 by a significant amount. After the latching connection 50, 51 has been released, both the contact lever 4 and the signal lever 5 can pivot freely clockwise to the right.
• the lock 8 is not deflected by the toggle lever 7, 11, so that the latching connection 50, 51 between the signal lever 5 and the lock 8 is not released and the signal lever 5 is not released can pivot, whereas the contact lever 4 can pivot clockwise to the right.
• the contact lever 4 acts on the leaf spring 56 and the signal lever 5 acts on the leaf spring 57 in such a way that the leaf spring 56 is pressed by the contact lever 4 against the fixed contact 33 in the OFF position and against the fixed contact 34 in the ON position and that the movable contact 35 is pressed by the signal lever 5 in the ON position against the fixed contact 32 and in the OFF position against the fixed contact 31.
• the leaf spring 56 is received on the contact lever 4 between two lugs 58 and 59 and the leaf spring 57 on the signal lever 5 between lugs 60 and 61.
• the movable contacts 35, 36 are in the electrical OFF position, ie if they were actuated by an electrical fault condition by the circuit breaker, on the two left contacts 31 and 33 fixed to the housing, whereas in the 3, the movable contact 35 (of the signal lever 5) bears against the right contact 32 fixed to the housing and the movable contact 36 (of the contact lever 4) bears against the left contact 33 fixed to the housing.
• both movable contacts 35, 36 are located on their assigned, right-hand fixed contacts 32, 34. In this way it is possible in a simple manner to determine the respective circuit state of the circuit breaker or the cause for its switching off by a corresponding switching of the contacts 31 to 36, that is to say via the connecting terminals 25 to 30 assigned to them.
• the lock 8 be completely deactivated, i.e. that the signal lever 5 always, i.e. regardless of the type of triggering, is moved according to the contact lever 4.
• the lock 8 is fixed in its clockwise position, in which it cannot lock with the signal lever 5.
• the control lever 62 of the lock 8 in the housing is assigned an eccentric shaft 10 which, in the position shown in the figures, does not hinder the movement of the lock 8 counterclockwise.
• the eccentric shaft 63 is rotated by at least 90 °, as shown in dashed lines in FIG. 5, it rotates the lock 8 via its adjusting lever 62 to such an extent that it can no longer latch with the signal lever 5, as a result of which the lock 8 is put out of function in a simple manner.
• this has a slot 66 for e.g. a screwdriver.
• a signal arm 64 is also arranged on the signal lever 5, which reaches the area of an opening 65 at the top of the lower shell 1 when the signal lever is in the OFF position, so that a simple visual check is made directly on the additional switch as to whether there is an electrical or manual release.
• a test button 9 is arranged in the area next to the actuating button 3, which is loaded by the button spring 17 to the outside and which actuates the latch support 6 via its extension 52, that is to say pivoted clockwise and thus releases the toggle lever 7, 11 when it is pushed in or down.
• the leaf springs 56, 57 with the movable contacts 35 and 36 can have different shapes.
• a problem with circuit breakers or the additional switches assigned to them is that the switches are in the ON or OFF position for the majority of their operating time, so that the open contacts oxidize and thus have an increased resistance when closing.
• the signal lever 5 and the contact lever 4 are pivoted a little further, about 1 ° to 5 °, preferably about 2 ° to 3 °, whereby the leaf spring 56 is somewhat stretched and the leaf spring 57 is bent a little further. This leads to a relative movement, i.e.
• Frictional movement between the movable contacts 35, 36 and the contacts 32, 34 fixed to the housing. The same can also be done with the opposite contacts 31, 33, i.e. the contacts of the respective OFF position. This relative movement prevents reduced contacting by oxidizing.
• the invention can be represented as follows, for example:
• the additional switch for mounting on electrical circuit breakers has two movable electrical contacts 35, 36, each of which is assigned two fixed electrical contacts 31, 32, 33, 34.
• the movable electrical contacts 35, 36 are actuated by a signal lever 5 and a contact lever 4, an actuating button 3 being connected to the contact lever 4 via a toggle lever 7, 11.
• the actuation button 3 can be connected to the actuation button of the circuit breaker.
• a pawl support 6, which can be connected to the switching mechanism of the circuit breaker, is used to trigger the signal lever 5 and / or the contact lever 4.
• One arm of the toggle lever 7, 11 is formed by a pawl 7 which, when the additional switch is switched on, connects with the Jack support 6 hooked.
• a lock 8 which can prevent the movement of the signal lever 4 when the additional switch is triggered via the actuation button 3 (on the signal lever 5 there is a latching projection 50, on which a corresponding latching projection 51 can hook on the lock 8) mounted on the housing 1 and movable by the toggle lever 7, 11 from the position preventing the triggering of the signal lever 5 when the additional switch is triggered by the circuit breaker via the jack support 6.
• the lock 8 has an actuating lever 62, to which an actuating device (eccentric shaft) 10 mounted in the housing 1, 2 is assigned, via which the lock 8 can be fixed in a position in which it cannot latch with the signal lever 5.

Landscapes

• Switch Cases, Indication, And Locking (AREA)
• Breakers (AREA)
• Control Of Eletrric Generators (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)
• Vehicle Body Suspensions (AREA)
• Electrophonic Musical Instruments (AREA)
• Lock And Its Accessories (AREA)
• Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Engine Equipment That Uses Special Cycles (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3491170

Family Applications (1)

Country Status (7)

Cited By (7)

Citations (3)

• 1995
  • 1995-03-15 AT AT0045895A patent/AT402582B/de not_active IP Right Cessation
• 1996
  • 1996-03-13 EP EP96903830A patent/EP0815576B1/de not_active Expired - Lifetime
  • 1996-03-13 AU AU47791/96A patent/AU697688B2/en not_active Ceased
  • 1996-03-13 ES ES96903830T patent/ES2123340T3/es not_active Expired - Lifetime
  • 1996-03-13 AT AT96903830T patent/ATE171811T1/de active
  • 1996-03-13 DE DE59600632T patent/DE59600632D1/de not_active Expired - Lifetime
  • 1996-03-13 DK DK96903830T patent/DK0815576T3/da active
  • 1996-03-13 WO PCT/AT1996/000046 patent/WO1996028836A1/de active IP Right Grant

Patent Citations (3)

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