EP2264733A2 - Trigger with trigger mechanism which can be adjusted for U or A triggering - Google Patents

Abstract

The trigger (1) has a rocking lever pivotably supported in a rocking lever receiver spaced with respect to movement axis of a trigger pin (541). The rocking lever comprises two free rocking lever arm ends, which are operatively connected with an actuator connector (511) and a trip unit, respectively. A pin receiver guides the trip unit perpendicular to translational movement direction of an actuator. The rocking lever receiver is rotatably supported around an axis extending through the trigger pin and adjusted in two different positions.

Description

The invention relates to a trigger for an electrical switching device with a trigger housing and disposed in the trigger housing electromagnetic exciter, consisting of an excitation coil and a movable armature, and arranged in a trigger housing, operatively connected to the armature release mechanism.

In the prior art additional modules for circuit breakers are known. These additional components are also referred to as triggers or auxiliary triggers and are operatively connected via a mechanical transmission unit with the circuit breaker. Auxiliary releases can be used as a shunt release or undervoltage release and have a magnetic coil and an armature. A mechanical release system transfers the position of the armature to the circuit breaker of the circuit breaker.

If the auxiliary release is operated as a shunt release, a high current flow through the coil causes the armature to attract and triggers the switching mechanism of the circuit breaker via the release system.

The armature of an auxiliary release operated as an undervoltage release drops out when a voltage is undershot and likewise acts on the switching mechanism of the circuit breaker via the mechanical release system.

Many auxiliary releases are known from the prior art, which optionally by the different arrangement of the magnetic and / or mechanical components during assembly can be operated as a shunt release or undervoltage release.

The DE 100 04 597 A1 discloses an auxiliary release which is laterally attachable to a circuit breaker housing. A solenoid with swivel lever armature acts via a driving swivel lever on the switch lock of the circuit breaker. Depending on the application, the solenoid coil with swivel armature is installed offset in each case by 180 ° as a shunt release or undervoltage release. As a result, the tightening of the pivot lever armature in the event of overcurrent and the falling off of the pivot lever armature in the case of undervoltage are transmitted in the same direction as mechanical movement.

The DE 42 42 162 A1 describes an optionally operable as a working current or undervoltage release Hilfsaulöser, in which case only the armature and the mechanical transmission member is installed offset by 180 ° for the conversion.

The FR 1 637 121 also discloses an auxiliary release with a magnetic coil and an associated swivel armature, whereby also here the installation according to the application as Arbeitsstrom- or undervoltage release is rotated by 180 °.

Also known in the art are auxiliary releases from the company Moeller, which can be operated by the conversion of the release mechanism either as shunt release or undervoltage release. The release pin, which engages mechanically in the switching mechanism of a circuit breaker, is connected via a Rocker mechanism, which converts the translational movement of the armature in a lifting movement moves (see Fig. 1a and 1b and 2a and 2b). The toggle mechanism is implemented according to the application of the auxiliary switch as shunt release or undervoltage release. In Fig. 1a and 1b the schematic diagram of an undervoltage release is shown. Fig. 1a shows the undervoltage release in the non-tripped position. The actuator 51 ', which is connected to the armature, is at rest. The armature is tightened in this case. The trigger pin 541 'is located within the trigger housing 11'. If a threshold voltage is exceeded, the armature detaches from the magnetic core and is moved via a spring into the release position ( Fig. 1b ). The actuator 51 'is translated and acts on the Aktoranbindung 511' on a rocker arm 53 '. The rocker arm 53 'tilts over the rocker arm pivot 532', which is mounted centrally in the rocker arm 53 'and which is rotatably mounted in a rocker arm receptacle 521'. When tilted, the rocker arm 53 'moves the release pin 541' guided in a pin receptacle 522 'out of the release housing 11'. The release pin 541 'acts on a switching mechanism of a switching device attached to the trigger and triggers the switching mechanism.

Fig. 2a and 2b show the trigger as a shunt release, which is to trigger a switching device when exceeding the current flowing through the trigger. The rocker arm 53 'in this case is mounted in a second rocker arm receptacle 521 ", which is attracted to the armature of the electromagnetic activator by an overcurrent and acts on the actuator 51', which performs a translational movement The actuator 51 'is pulled in the opposite direction The rocker arm 53 'tilts and pushes the Trigger pin 541 'out of the trigger housing 11' out. The switching device is switched off.

It is therefore always necessary to open the auxiliary release housing in order to install or modify the components according to the application. So that a user can accomplish the conversion of a Hilfsaulösers on site, the housing must be designed so that a repeated opening and closing can be performed. The user on site must also have technical knowledge in order to be able to carry out any reconstruction work safely. Errors during the reconstruction of an auxiliary release can not be ruled out. As a result, there is a high probability of failure due to lack of technical skill.

The object of the invention is to provide a low-cost release that can be used optionally and simply as a shunt release or undervoltage release without additional installation effort.

According to the invention the object is achieved by a device according to claim 1. Advantageous embodiments of the device will become apparent from the dependent claims.

The invention relates to a trigger for an electrical switching device with a trigger housing and arranged in the trigger housing electromagnetic exciter, consisting of an excitation coil and a movable armature, and arranged in a trigger housing, operatively connected to the armature release mechanism. The triggering mechanism according to the invention consists of a translator with respect to the trigger housing forward and zurückschiebbaren actuator with at least one actuator connection and a trip unit, which has a release pin. Furthermore, the triggering mechanism has a rocker arm which is pivotably mounted in a rocker arm receptacle spaced apart from the axis of movement of the trigger pin. The rocker arm has two free Kipphebelarmenden, wherein the first Kipphebelarmende pivotally operatively connected to the actuator connection and the second Kipphebelarmende with the trip unit. Furthermore, the triggering mechanism according to the invention has a pin receptacle which guides the triggering unit substantially perpendicular to the translational movement direction of the actuator. The trigger according to the invention is characterized in that the rocker arm receptacle is rotatably mounted about an axis extending through the trigger pin and is adjustable in at least two different positions.

It has proven to be particularly advantageous that the trip unit has a release pin pivotally connected to a pin bearing on the second Kipphebelarmende the rocker arm.

Advantageously, the pin holder and the Kipphebelaufnahme are arranged on a rotary bearing. A particularly preferred embodiment is that the pin receptacle and the Kipphebelaufnahme are integrally formed with the pivot bearing. As a result, a particularly high stability of the pivot bearing is generated. The production is particularly cost-effective due to the reduction in the number of pieces. Likewise, the storage costs are reduced.

In a further, particularly advantageous embodiment of the invention, the pivot bearing on an adjusting head on the axis of rotation of the pivot bearing, by the External release housing can be operated from the outside. An advantage of the invention is that the auxiliary doggie housing no longer needs to be opened to selectively set an undervoltage release or a shunt release. As a result, the housing can be firmly closed and requires no opening mechanisms, such as screws and hinges. The housing can thus be manufactured very inexpensively.

Furthermore, it has been found to be advantageous that the Aktoranbindung is formed partially circular in shape, that the two ends of the part-circular Aktoranbindung are attached to the actuator. Furthermore, it has proven to be advantageous that the circle center of the part-circular actuator connection lies in the longitudinal axis of the release pin. As a result, the rocker arm is constantly operatively connected to the actuator connection during the rotation of the rocker arm receptacle and a multiplicity of different positions of the actuator connection are realized. The lifting movement of the release pin is dependent on the position of the rocker arm for part-circular actuator connection. It can thus be realized different strokes of the release pin.

By looking out of the auxiliary shutter housing adjustment head, the user can recognize whether the auxiliary release was set as shunt release or as undervoltage release when the auxiliary shutter housing is labeled around the adjustment head.

By locking means, the rotation of the pivot bearing can be locked within the auxiliary release, so that the user has the ability to limit the lifting movement of the trigger pin and keep the pivot bearing safely in the position as undervoltage or overcurrent release. This can be required if the circuit breaker controlled by the release pin switch locks with different geometries. The predetermined detent allows the user to set the pivot bearing more precisely.

Another advantage of the invention is that can be made neutral by rotation of the adjusting head by 90 ° in the middle position between shunt release and undervoltage release of the auxiliary release, so that no tripping occurs when undervoltage or overcurrent is applied. This makes it possible to perform maintenance on the system without disconnecting the auxiliary release.

Further advantages, features and expedient developments of the invention will become apparent from the dependent claims and the following description of preferred embodiments with reference to the drawings.

Fig. 1

zwei schematische Ansichten eines Auslösemechanismus aus dem Stand der Technik für einen Unterspannungs-Auslöser;

Fig. 2

zwei schematische Ansichten eines Auslösemechanismus aus dem Stand der Technik für einen Arbeitsstrom-Auslöser;

Fig. 3

zwei schematische Ansichten einer Ausführungsform eines erfindungsgemäßen Auslösemechanismus für einen Unterspannungs-Auslöser;

Fig. 4

zwei schematische Ansichten einer Ausführungsform eines erfindungsgemäßen Auslösemechanismus für einen Arbeitsstrom-Auslöser;

Fig. 5

zwei perspektivische Ansichten einer Ausführungsform eines erfindungsgemäßen Auslösemechanismus für einen Unterspannungs- Auslöser;

Fig. 6

zwei perspektivische Ansichten einer Ausführungsform eines erfindungsgemäßen Auslösemechanismus für einen Arbeitsstrom-Auslöser;

Fig. 7

Draufsicht eines Auslösers mit einer Ausführungsform eines erfindungsgemäßem Auslösemechanismus;

Fig. 8

Seitenansicht des Auslösers aus Fig. 7.

From the pictures shows:

Fig. 1

two schematic views of a tripping mechanism of the prior art for an undervoltage release;

Fig. 2

two schematic views of a tripping mechanism of the prior art for a shunt trip;

Fig. 3

two schematic views of an embodiment of an inventive release mechanism for an undervoltage release;

Fig. 4

two schematic views of an embodiment of a release mechanism according to the invention for a shunt release;

Fig. 5

two perspective views of an embodiment of a release mechanism according to the invention for an undervoltage release;

Fig. 6

two perspective views of an embodiment of a release mechanism according to the invention for a shunt release;

Fig. 7

Top view of a trigger with an embodiment of a trigger mechanism according to the invention;

Fig. 8

Side view of the trigger off Fig. 7 ,

The trigger 1 according to the invention has gem. Fig. 7 a mounted in a trigger housing 11, electromagnetic exciter. The exciter consists of an excitation coil 31 with a fixed magnetic core 32 and a movable armature 33. The armature 33 is operatively connected via an actuator 51 with the trigger mechanism 5. Between a support in the housing and the actuator 51 is an armature spring 4, which acts on the armature 33 and thus also the actuator 51 with an opposing force generated by the exciting coil 31 between magnetic core 32 and armature 33.

The translational movement of the armature 33 is transmitted to the actuator 51 of the trigger mechanism 5. The actuator 51 transmits this translational movement to a rocker arm 53. The rocker arm 53 is mounted in a Kipphebelaufnahme 521, so that a conditional by the actuator 51, translational movement is translated into a pivotal movement of the rocker arm, since the rocker arm 53 at a first end via an Aktoranbindungsaufnahme 533 with an actuator connection 511 attached to the actuator 51 is operatively connected. The rocker arm tilts about an axis of rotation D. If the rocker arm 53 pivots about the axis of rotation D because of the translational movement of the actuator 51, the second end of the rocker arm 53 opposite the actuator connector receptacle 533, designed as a pin bearing 531, carries a release pin 542 with it. The trigger pin 542 is attached to one end of a trip unit 54. The release unit 54 is guided in a pin receptacle 522 such that it is only substantially perpendicular to the translational movement of the actuator 51 slidably. Other relative movements between actuator 51 and trip unit 54 can be realized. Thus, the pin receptacle 522 may be arranged according to the geometrical dimensions of the trigger housing 11 at any other angle to the translational movement of the actuator 51 (eg 45 °). In this case, the geometry of the rocker arm must be adjusted.

Furthermore, a pivot bearing 52 is provided which rotatably receives the rocker arm 53 via a rocker arm receptacle 521. In addition, the rotary bearing 52 has a pin receptacle 522, in which the release unit 54 is arranged displaceable substantially perpendicular to the translational movement of the actuator 51. The pivot bearing 52 also has an adjustment head 523. The pivot bearing 52 is beyond the adjustment head 523 from outside the trigger housing 11 rotatably mounted about the longitudinal axis of the release pin 541. It can not be present latching means in the trigger housing 11 of the trigger 1, which allow a latching of the pivot bearing 52. For example, latching means may be present on the inside of the housing of the trigger housing 11, which enable latching of the pivot bearing 52. The adjustment knob 523 is configured to receive the tip of a screwdriver, for example. Different geometries, such as longitudinal slots or cross slots can be used.

Furthermore, the triggering mechanism 5 according to the invention has an actuator connection 511, which effectively connects the actuator 51 with the rocker arm 53. The Aktoranbindung 511 is part-circular formed on the actuator 51, wherein the circle center as a geometric center of the part-circular actuator connection 511 with the longitudinal axis of the release pin 541 approximately coincides when the release pin 541 is not extended.

If the rotary bearing 52 is rotated about the adjusting head 523 about the longitudinal axis of the release pin 541, the Aktoranbindungsaufnahme 533 remains in operation during the whole time with the circular Aktoranbindung 511 operatively connected. The Aktoranbindungsaufnahme 533 is designed such that it is operatively connected to the Aktoranbindung 511 even during the tilting of the rocker arm 53. The pin receptacle 522 is rotated during the rotation of the pivot bearing 52 such that the sift bearing 531 of the rocker arm 53 is always operatively connected to the release pin 542 of the trip unit 54 during rotation of the pivot bearing 52.

It is possible to adjust by a slight rotation of the pivot bearing 52 by about 10 ° - 45 ° the stroke of the release pin 541 to the geometry of the switching mechanism of the connected circuit breaker. If the pivot bearing is rotated by 90 ° away from an end stop, so that the axis of rotation D is parallel to the translational movement of the actuator 51, the lifting movement of the trigger pin is close to zero.

If the axis of rotation D runs perpendicular to the translational movement direction of the actuator 51, the stroke executed by the release pin 541 is maximum. In the position of the pivot bearing 52 after Fig. 3a and 3b In this embodiment, an undervoltage release is realized. When a voltage is applied to the exciting coil 31, the armature 33 is attracted to the fixed magnetic core 32. The actuator is in the rest position Fig. 3a , The release pin 541 is located within the trigger housing 11. The armature 33, which is pushed away with an armature spring 4 from the magnetic core 32 when the field of the exciting coil 31 falls below a certain size, transmits its movement to the actuator 51, which in turn via the rocker arm 53rd pushes the release pin 541 from the trigger housing 11 and thus triggers the switch lock, not shown, of the circuit breaker ( Fig. 3b ).

In Fig. 4a and 4b Trigger 1 is set as a shunt release. The pivot bearing 52 was made from the position Fig. 3a and 3b in the position according to Fig. 4a and 4b turned. The rest position in Fig. 4a is present when the magnetic field of the exciting coil 31 is not sufficient to overcome the spring force of the armature spring 4. If the current in the excitation coil 31 increases, the armature 33 is attracted by the magnetic core 32 as of a threshold value. This will be the actor 51 moves translationally and transmits this movement via the rocker arm 53 on the trigger pin 541, which then also protrudes the trigger housing 11 and can trigger a switching mechanism of a circuit breaker ( Fig. 4b ).

Of course, other arrangements of exciting coil 31, magnetic core 32 and armature 33 within the trigger housing 11 are possible, so that the directions of movement can be reversed.

LIST OF REFERENCE NUMBERS

1

trigger

11, 11 '

trigger housing

2a, 2b

connection elements

31

excitation coil

32

magnetic core

33

anchor

4

armature spring

5

trigger mechanism

51, 51 '

actuator

511, 511 ', 511 "

actuator connections

512

spring mount

52

pivot bearing

521, 521 ', 521 "

tilting lever

522, 522 '

pin receptacle

523

adjustment head

53, 53 '

rocker arm

531, 531 '

pin bearing

532, 532 '

Kipphebelzapfen

533, 533 '

Aktoranbindungsaufnahme

D

axis of rotation

54

trip unit

541, 541 '

release pin

542, 542 '

Release pin pin

Claims (7)

Trigger (1) for an electrical switching device with a trigger housing (11) and in the trigger housing (11) arranged electromagnetic exciter, consisting of an excitation coil (31) and a movable armature (33), and one in the trigger housing (11) arranged with the trigger (33) operatively connected trigger mechanism (5), which in turn consists of: a translator with respect to the trigger housing (11) forward and zurückschiebbaren actuator (51) with at least one actuator connection (511), a trip unit (54) having a trigger pin (541), - A rocker arm (53) which is pivotally mounted in a relative to the movement axis of the release pin (541) rocker arm receptacle (521), wherein the rocker arm (53) has two free Kipphebelarmenden, wherein the first Kipphebelarmende with the Aktoranbindung (511) and the second Kipphebelarmende pivotally operatively connected to the trip unit (54), a pin receptacle (522) which guides the trip unit (54) substantially perpendicular to the translational direction of movement of the actuator (51), characterized,
in that the rocker arm receptacle (521) is rotatably mounted about an axis extending through the release pin (541) and is adjustable in at least two different positions. Trigger (1) according to claim 1,
characterized,
that the triggering unit (54) comprises a trigger pin stud (542) which is provided with a bearing pin (531) pivotally connected to the second Kipphebelarmende of the rocker arm (53). Trigger (1) according to claim 1 or 2,
characterized,
in that the pin receptacle (522) and the rocker arm receptacle (521) are arranged on a pivot bearing (52). Trigger (1) according to claim 3,
characterized,
in that the pin receptacle (522) and the rocker arm receptacle (521) are integrally formed with the pivot bearing (52). An auxiliary release (1) according to claim 3 or 4,
characterized,
in that the pivot bearing (52) has an adjusting head (523) on the axis of rotation (D) of the pivot bearing (52), which can be operated externally by the trigger housing (11). Trigger (1) according to claim 1 to 5,
characterized,
that the actuator connections (511) is adapted to part-circular, that the two ends of the part-circular actuator connections (511) are attached to the actuator (51). A triggering mechanism (5) according to claim 6,
characterized,
that the circular center of the part-circular actuator connections (511) located in the longitudinal axis of the trigger pin (541).

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