KR101560218B1

KR101560218B1 - Attachment module for detection of a switching state of an electromagnetic switching device

Info

Publication number: KR101560218B1
Application number: KR1020127007618A
Authority: KR
Inventors: 미하엘라 콜러; 헬무트 클라우스; 마누엘 가이트너
Original assignee: 지멘스 악티엔게젤샤프트
Priority date: 2009-08-24
Filing date: 2010-07-16
Publication date: 2015-10-14
Also published as: WO2011023458A1; EP2471084B1; KR20120081102A; EP2471084A1; DE102009038671A1; CN102484018B; BR112012004025B1; IN2012DN00917A; CN102484018A; BR112012004025A2

Abstract

The present invention relates to an attachment module for the detection of the switching state of an electromagnetic switching device with a switch housing, wherein operating means are arranged in the switch housing, said operating means being in the form of a plunger (6) The end is operatively connected to the switching element 9, in particular to the microswitch. The present invention is characterized in that the plunger 6 has a snap-action hook 7 at the other end and the snap-action hook 7 transfers three possible switch positions of the electromagnetic switching device to the switching element 9 Respectively.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an attachment module for detecting a switching state of an electromagnetic switching device,

The present invention relates to an attachment module for the detection of switching states of an electromagnetic switching device, said attachment module having a switch housing in which an actuator is arranged, the actuator comprising a plunger ) And is operatively connected to a switch element, particularly a microswitch, at one end.

Electromagnetic switching devices within the meaning of the present invention take the form of contactors, breakers and power relays. For these types of electromagnetic switching devices, and particularly for the contactors, in many applications, the actual switching state of the electromagnetic switching device, as opposed to the operating state of the electromagnetic switching device, It is necessary to decide in order to be able to analyze the operating state of the electromagnetic switching device.

Up to now, information indicating the switch position of an electromagnetic switching device, in particular a contactor, has been obtained via a star delta connection. Thus, the electrical interlocking of the two coupled contactors is implemented through auxiliary contacts that must be wired as far as the star delta connections.

In the prior art, this switching state determination is made through a data capture device. Here, a mechanical switch contact is arranged in the housing, and the mechanical switch contact changes its switching state when the plunger moves from one end position to the other end position. The switch contact is connected to the analysis device via data lines so that the switch position of the switch contact and thus the switching state of the electromagnetic switching device can be determined from the analysis device. The data capture device is typically a separate device that is different from the electromagnetic switching device, e.g., a so-called auxiliary switch.

In addition, a data capture device for determining the switching state of an electromagnetic switching device is known from DE 10 2007 002 176 A1, wherein the data capture device has a housing in which the plunger is movably mounted. The plunger can be moved between two mechanical end positions, and the end position of the plunger corresponds to the switching state of the electromagnetic switching device. Within the housing is arranged a sensor device from which it is possible to determine at which end position of the end positions the plunger is located and from which the corresponding electrical signal can be transmitted have. The sensor device is implemented in such a manner that the position of the plunger can be determined from the sensor device without touching the plunger. A tapping connection is also arranged on the housing and the tapping connection can be accessed from outside the housing and through the tapping connection an electrical signal emitted from the sensor device is transmitted directly Lt; / RTI > A conditioning circuit is additionally arranged on the housing and the conditioning circuit processes the electrical signal emitted by the sensor device into a message and transmits the message via a communication link, do.

A disadvantage of the prior art is that only two different switching states, namely the 'on' and 'off' states can be displayed via the detection device. Thus, through the switching status indicator, it was not very possible for the contacts in the electromagnetic switching device to determine the welded switching state.

Accordingly, it is an object of the present invention to create an attachment module for determining the switching state of an electromagnetic switching device, said attachment module being characterized in that said attachment module comprises three possible switching states of the switching device, Off " state, and a switching state in the case of welded contacts.

This object is achieved through an attachment module having the features of claim 1. Advantageous embodiments or improvements that may be used individually or in combination form the subject matter of the dependent claims.

This object is achieved through an attachment module for determining a switching state of an electromagnetic switching device, the attachment module having a switch housing, the actuator being arranged within the switch housing, the actuator being implemented as a plunger, Is in operable connection with the switch element, in particular the microswitch. The invention is characterized in that the plunger has a snap-action hook at its other end and the snap-action hook delivers three possible switch positions of the electromagnetic switching device to the microswitch . The electromagnetic switching device may be a contactor having a coil, and a switching current (IS) may be applied to the coil. When the switching current IS is applied to the coil, the coil pulls the armature. When the switching current IS is interrupted, the armature moves away from the coil as a result of a restoring spring force. The plunger is connected to the armature. Thus, the plunger is also pulled by the coil with the armature. As a result of the movement of the plunger, at least one load contact is closed, so the load current IL can flow. Conversely, upon interruption of the switching current IS, the load contact is opened one more time.

Alternatively, the electromagnetic switching device may also be a circuit breaker, for example. In this case, the switching current IS is equal to the load current IL. In this case, if the load current IL is too large, the coil pulls the armature. As a result of the armature being pulled, the switch latch is released and then the switch latch moves the plunger to the position where the load contact stays open. Here, the position of the plunger is implemented such that the position of the plunger corresponds to the state of the load contact and thus corresponds to the switching state of the electromagnetic switching device, regardless of the specific design of the electromagnetic switching device. According to the invention, the plunger can display three possible switch positions of the electromagnetic switching device, namely the 'on' and 'off' positions and the switch position in the case of welded contacts. Thus, the switch position of the contactor is directly forwarded to the module through the plunger as a mechanical switch position indicator. A lug is located on the switch position indicator, which actuates the switch element in the attachment module, in particular the microswitch, upon switching of the contactor. Through this switch element, the triggering signal of the individual other contacts is routed through the switch element in the attachment module of the first contactor, in order to implement the interlocking of the two electromagnetic switching devices, in particular the two contacts. Advantageously, therefore, interlocking is no longer effected through the auxiliary contacts of the contactor, but rather through the switch element in the module. A further related advantage is that the auxiliary contact in the contactor is at a free disposal of the customer, and the customer need not be responsible for additional wiring. In addition, the devices are pre-assembled as a whole, through which the potential for defects can be minimized.

According to the present invention, the plunger has a snap-action hook at one end and a snap-action hook at the other end, the snap-action hook having different switching states, And takes three different positions relative to the reference edge to indicate the switching state in the case of contacts.

In a particularly advantageous embodiment, the attachment module has a communication cable, which enables the transmission of triggering signals between the two attachment modules. Further advantageously, it is provided that in the case of interlocking of two mutually coupled electromagnetic switching devices, in particular two contactors, the triggering signal of one contactor is routed through the switch element in the attachment module of the other contactor.

Additional advantages and embodiments of the invention are described below on the basis of illustrative embodiments and drawings.

1 shows a cross-sectional view of an attachment module of the present invention for determining the switching state of an electromagnetic switching device.
Figure 2 shows a cross-sectional view of an attachment module according to the invention according to figure 1, with a communication cable.
Figure 3 shows a schematic diagram of three different switch positions of a snap-action hook for three different states of an electromagnetic switching device.

Figure 1 shows an attachment module 1 of the invention with a housing upper section 2 which is attached to the outer housing 4 via latch elements 3 . A guide unit 5, in which the plunger 6 is mounted in the guide unit 5, projects from the housing upper section 2 into the interior of the housing. The attachment module 1 is placed on a protective device (not shown), preferably a contactor, wherein the attachment module 1 and the protection device are attached to each other via a snap- In an operable connection state. When the triggering process is performed, the plunger 6 actuates the switch element 9 through the spring element 8. The transfer from the plunger 6 to the spring elements 8 takes place via the hook-shaped protrusion 10 on the plunger 6. The switch element 9 has connection elements 11 for printed circuit boards. In addition, plug-in connections 12 and an additional electrical component 13 are arranged in the attachment module 1.

Figure 2 shows, in a particularly advantageous embodiment, an attachment module 1 with an integrated communication cable 14, which enables the transmission of triggering signals between the two attachment modules. In the case of interlocking of two mutually coupled electromagnetic switching devices, in particular two contactors, the triggering signal of one contactor can thereby be routed through the switch element in the attachment module of another contactor.

Figure 3 shows the three possible switching states, the 'on' and 'off' states and the switching states in the case of welded contacts in an electromagnetic switching device, the three possible switching states being the snap- Is transmitted to the switch element (9) through the working hook (7). The snap-action hook 7 changes its position with respect to the reference edge 15, according to three possible switch positions in the electromagnetic switching device. Figure 3 shows that the snap-action hook 7 takes its position with respect to the reference edge 15 in accordance with the direction of movement 16 to the three defined positions 17,18, And " off " states and the switching state in the case of welded contacts.

The present invention provides two critical advantages. On the one hand, the three possible switch positions of the electromagnetic switching device, namely the 'on' and 'off' states and the switching states in the case of welded contacts, are displayed correctly through the attachment module of the invention. On the other hand, no ancillary contacts are required for interlocking of the two electromagnetic switching devices, so the degree of wiring is thus reduced, and the auxiliary contacts can be used elsewhere.

Claims

An attachment module for detection of switching states of an electromagnetic switching device,
A switch housing,
An actuator is arranged in the switch housing,
The actuator is embodied as a plunger 6 and at one end is in operative connection with a switch element 9,
The plunger (6) has a snap-action hook (7) on its other end and the snap-action hook (7) is connected to the electromagnetic switching device To the switch element (9), and the switch element
The three different switching states include an on and off state and a switching state in which the contacts in the electromagnetic switching device are welded.
An attachment module for detection of switching states of an electromagnetic switching device.

The method according to claim 1,
The snap-action hook 7 has three different positions 17, 18 and 19 with respect to a reference edge 15,
An attachment module for detection of switching states of an electromagnetic switching device.

delete

3. The method according to claim 1 or 2,
The attachment module (1) has a communication cable (14) which enables transmission of triggering signals between two attachment modules,
An attachment module for detection of switching states of an electromagnetic switching device.

3. The method according to claim 1 or 2,
In the case of interlocking of two mutually coupled electromagnetic switching devices via the switch element 9, the triggering signal of one electromagnetic switching device is transmitted through the switch element 9 in the attachment module of the other electromagnetic switching device Routed,
An attachment module for detection of switching states of an electromagnetic switching device.

6. The method of claim 5,
The two mutually coupled electromagnetic switching devices are two contactors,
An attachment module for detection of switching states of an electromagnetic switching device.

The method according to claim 1,
The switch element 9 is a microswitch,
An attachment module for detection of switching states of an electromagnetic switching device.