EP2624275A1 - Electric switch - Google Patents

Abstract

The switch (10) has a motor drive (30) including a control switch (50), which enables manual operation of the drive in a switching position (M) and remote control of the drive by a remote control activation signal (SR) and a converting signal (SU) at control signal inputs (60, 70) of the drive in another switching position (R). The drive includes control devices e.g. microprocessors, which allow a remote controlled actuation of the switch by the drive when the control switch takes the latter switching position, and simultaneously the control signals carry out signal exchange at the inputs. The control switch is a disk switch.

Description

The invention relates to an electrical switch, in particular an electrical circuit breaker, with a motor drive.

As is known, electrical switches can be equipped with separate motor drives with which a switching of the electrical switches can be effected by a remote control. Such motor drives are usually placed from the outside on the switch housing of the electrical switch.

The invention has for its object to provide an electrical switch that allows remote control of the motor drive from the outside, while ensuring a particularly high level of operator safety.

This object is achieved by an electrical switch with the features of claim 1. Advantageous embodiments of the switch according to the invention are specified in subclaims.

Thereafter, the invention provides that the motor drive has an operating switch, which allows at least two switching positions, the control switch in a first switching position manual operation of the motor drive and in a second switching position allows remote control of the motor drive via a control signal to a control signal input of the motor drive, and the motor drive has a controller connected to the operating switch and the control signal input, which is designed such that it allows a remote controlled actuation of the electrical switch by the motor drive only when the operating switch assumes its second switching position and at the same time the control signal at the control signal input one Signal changes.

A significant advantage of the motor drive according to the invention is the fact that this prevents unintentional accidental switching on the switch when an electrical residual potential has remained at a switching of the control switch at the control signal input, due to a previous, but not temporally current remote control of the motor drive is. If, for example, at an earlier time switching on the electrical switch by applying a corresponding potential at the control signal input has been required, but the execution of this command has been suppressed because of the first switching position of the control switch, so it could at a later date, when the control switch in the second switching position is brought to a faulty remote control of the switch, if the previously applied to the control signal input potential has not been reset or removed. At this point, the invention starts by providing according to the invention that an electrical remote control of the switch can only take place when the operating switch assumes its second switching position and at the same time makes the control signal to the control signal input a signal change. By this measure according to the invention it is ensured that a remote-controlled switching of the switch can only take place when actually intentionally and deliberately via the remote control switching caused or caused to be. If there is no "intended" signal change at the control signal input, then the respective existing control signal potential is disregarded.

Preferably, the control device takes into account only those signal changes that indicate a signal information change.

According to a first particularly preferred embodiment of the electrical switch, it is provided that the control signal at the control signal input is a signal information deactivating the remote control and activating the remote control Signal information and the control device is configured such that it allows a remote controlled actuation of the electrical switch by the motor drive only when the control signal from the remote control deactivating signal information to the remote control activating signal information changes. In the first particularly preferred embodiment, the control device thus evaluates a control signal with which the remote control is activated or deactivated.

It is considered to be particularly advantageous if the control signal at the control signal input can have a signal level deactivating the remote control and a signal level activating the remote control, and the control device is designed such that it permits a remote-controlled actuation of the electric switch by the motor drive only if Control signal from which the remote control deactivating signal level to the remote control activating signal level changes.

According to a second particularly preferred embodiment of the switch, it is provided that the control signal at the control signal input may have a switch-off information requesting the switching off of the switch and switch-on information requiring switching-on of the switch, and the control device is designed such that it switches on the electrical switch through the switch Motor drive only causes when the operating switch assumes its second switching position and simultaneously changes the control signal from the switch-off information to the switch-on information. In the second particularly preferred embodiment, the control device thus evaluates a control signal which carries the information for switching on or off the switch.

With regard to the second preferred embodiment, it is considered particularly advantageous if the control signal at the control signal input requires a switch-off of the switch "Ausschaltpegel" and a switching on the switch requesting "Einschaltpegel" may have, and the control device is designed such that it causes switching on of the electrical switch by the motor drive only when the operating switch assumes its second switching position and at the same time the control signal from the Switch off level to the switch-on level.

Preferably, the control device is configured such that, after a change of the switching position of the control switch, it disregards the control signal at the control signal input for a predetermined blocking time.

The operating switch preferably has, in addition to the first and second switching position, a third switching position in which the motor drive and thus a changeover of the electrical switch are blocked by the motor drive.

Preferably, the second switching position of the control switch between the first and third switching position of the control switch is arranged. In this case, it is considered advantageous if a changeover of the control switch from the first to the third shift position or a changeover from the third to the first shift position requires an intermediate activation or passing of the second shift position.

The control switch is preferably a slide switch.

In order to enable a simple attachment of the motor drive to the switch housing of the switch, it is considered advantageous if the motor drive is held on a switch housing of the switch by means of a latching device, which enables removal of the motor drive by unlocking the latching device.

The latching device preferably has at least one operator-actuatable unlocking element with which the latching device can be unlocked and a removal of the motor drive is made possible.

Preferably, the unlatching causes in a user-side operation both the unlatching of the latching device and a changeover of the control switch in the second switching position.

The invention also relates to a motor drive, in particular for an electrical switch, as has been described above.

With regard to such a motor drive, it is proposed according to the invention that the motor drive has an operating switch which allows at least two switching positions, wherein the operating switch in a first switching position, a manual operation of the motor drive and in a second switching position, a remote control of the motor drive via a control signal to a control signal input of the motor drive allowed, and the motor drive has a control device connected to the control switch and the control signal input, which is designed such that it allows a remote controlled actuation of the electrical switch by the motor drive only when the operating switch assumes its second switching position and at the same time the control signal the control signal input makes a signal change.

With regard to the advantages of the motor drive according to the invention, reference is made to the above statements in connection with the switch according to the invention, since the advantages of the switch according to the invention essentially correspond to those of the motor drive according to the invention.

Figur 1

ein Ausführungsbeispiel für einen elektrischen Schalter, der mit einem Ausführungsbeispiel für einen erfindungsgemäßen Motorantrieb ausgestattet ist,

Figur 2

ein Ausführungsbeispiel für eine Steuereinrichtung für den Motorantrieb des Schalters gemäß Figur 1,

Figur 3

beispielhaft die Arbeitsweise der Steuereinrichtung gemäß Figur 2 näher im Detail,

Figur 4

ein zweites Ausführungsbeispiel für eine Steuereinrichtung, die für den Motorantrieb des Schalters gemäß Figur 1 geeignet ist, und

Fig.5-6

die Arbeitsweise der Steuereinrichtung gemäß Figur 4 näher im Detail.

The invention will be explained in more detail with reference to embodiments; thereby show by way of example

FIG. 1

An embodiment of an electrical switch, which is equipped with an embodiment of a motor drive according to the invention,

FIG. 2

an embodiment of a control device for the motor drive of the switch according to FIG. 1 .

FIG. 3

exemplifies the operation of the control device according to FIG. 2 closer in detail,

FIG. 4

A second embodiment of a control device, the motor drive for the switch according to FIG. 1 is suitable, and

Fig.5-6

the operation of the control device according to FIG. 4 closer in detail.

For the sake of clarity, the same reference numbers are always used in the figures for identical or comparable components.

The FIG. 1 shows an electrical switch 10, which may be, for example, an electrical circuit breaker, in particular a three-phase electrical circuit breaker, act. The switch 10 comprises a switch housing 20, in which electrical switch contacts, not shown, are provided, with which a single- or multi-phase current I can be switched on and off.

The electrical switch 10 is also equipped with a motor drive 30 which is held by means of a not shown locking device on the switch housing 20 of the switch 10. The latching device allows the motor drive 30 to be removed from the switch housing 20 by pressing a user-actuatable unlocking element 40. By pressing the Entrastelements 40 is the Carried latching device from a locked position to a unlatched position and the motor drive 30 released, so that a removal of the motor drive 30 of the switch housing 20 is possible.

In the FIG. 1 In addition, it can be seen an operating switch 50 which is mounted on an outer side of the motor drive 30. The operating switch 50 enables three switching positions, namely a first switching position, which is identified by the reference M, a second switching position, which is designated by the reference symbol R, and a third switching position, which is identified by the reference symbol L.

If the operating switch 50 is in its first switching position M, manual operation of the motor drive 30 is possible; a remote control of the motor drive 30 is prevented in the first switching position M.

If the operating switch 50 is in its second switching position R, then the motor drive 30 allows a remote control from a distance.

In the third switching position L of the control switch 50, the motor drive 30 is completely locked, so that neither a manual operation from the outside of the motor drive 30 nor a remote control from a distance is possible.

In the FIG. 1 In addition, one recognizes two control signal inputs, of which a first control signal input is denoted by the reference numeral 60 and a second control signal input by the reference numeral 70. As will be explained in more detail below, the first control signal input 60 is for feeding a remote control activation signal SR, with which a remote control of the motor drive 30 can be activated, if the operating switch 50 is in its second switching position R.

The second control signal input 70 is used to supply a Umstellsignals SU, with which the electrical switch or located in the switch housing 20 of the electrical switch contacts for switching on or off the current I can be adjusted.

The motor drive 30 is connected to one in the FIG. 1 not shown, which processes the two control signals applied to the two control signal inputs 60 and 70, so the remote control activation signal SR and the Umstellsignal SU, depending on the respective switching position of the control switch 50.

An embodiment of such a control device is in the FIG. 2 shown in greater detail and identified by the reference numeral 100. The control device 100 comprises an evaluation module 110 as well as two AND gates 120 and 130.

The evaluation module 110 of the control device 100 is acted upon by the remote control activation signal SR and by an operating switch position signal SA. The operation switch position signal SA indicates the respective switch position of the operation switch 50 FIG. 1 In the following, it is assumed by way of example that the operating switch position signal SA has a logic "1" when the operating switch 50 is in its second switching position R. If, however, the operating switch 50 is in its first switching position M or its third switching position L, then the operating switch position signal SR has a logical "0" in the exemplary embodiments described here. Of course, the assignment can also be reversed.

The function of the evaluation module 110 is to generate with the applied remote control activation signal SR and the Bedienschalterstellungssignal SA a release signal SRB for enabling the remote control of the motor drive 30. The evaluation module 110 or the control device 100 in total can be, for example, by a microprocessor or be formed a microcontroller or at least include such.

The operation of the evaluation module 110 is exemplified by the FIG. 3 explained in more detail.

In the FIG. 3 By way of example, the signal profile of the remote control activation signal SR over the time t is identified above by way of example. In the presentation according to FIG. 3 By way of example, it is assumed that the remote control activation signal SR has a logical "1" when a remote control of the motor drive 30 or the electric switch 10 according to FIG FIG. 1 to be done remotely. If, on the other hand, no remote control is to be carried out, a remote control activation signal SR with a logic "0" is generated at the first control signal input 60.

The FIG. 3 further shows an example of the time course of the switching position of the control switch 50 according to FIG. 1 , It can be seen that the operating switch 50 in the period between 0 and t2, the third switching position L, in the period between t2 and t6, the second switching position R, in the period between t6 and t8, the first switching position M and from the time t8 again the second shift position R should take.

The FIG. 3 further shows the timing of the Bedienschalterstellungssignals SA over time t. It can be seen that the Bedienschalterstellungssignal SA has a logical "1" only in the period between t2 and t6 and from the time t8. In the periods between 0 and t2 and between t6 and t8, the Bedienschalterstellungssignal SA has a logic "0", because the operating switch 50 is either in the first switching position M or in the third switching position L.

The evaluation module 110 of the control device 100 according to FIG. 2 evaluates the remote control activation signal SR and the operation switch position signal SA and generates the enable signal SRB for enabling the remote control such that the enable signal SRB has a logical "1" only if the operating switch position signal SA has a logic "1" and simultaneously the remote control activation signal SR has a positive signal edge. In the embodiment according to FIG. 3 the enable signal SRB will thus have a logical "1" only in the time periods between t4 and t5 and between t10 and t11, since both criteria are satisfied only in these two time slots. At all other times, either the operation switch position signal SA has a logic "0", or no positive signal level change of the remote control activation signal SR occurs. The positive signal level changes of the remote control enable signal SR are in the FIG. 3 marked with arrows for a better understanding.

Again referring to the FIG. 2 It can be seen that the AND gate 120, the activation module formed by the evaluation module 110 SRB and the Umstellsignal SU, which at the second control signal input 70 of the motor drive 30 according to FIG. 1 is fed, evaluates. Only when both the enable signal SRB and the changeover signal SU have a logic "1", the control device 100 according to FIG. 2 generate a turn-on signal SEIN, with which the electrical switch 10 according to FIG. 1 or located in the switch housing 20 switching contacts to turn on the current I are turned on.

If the enable signal SRB has a logic "1" and the changeover signal SU has a logic "0", the further AND element 130 will generate a switch-off signal SAUS with a logic "1", with which the electrical switch 10 according to FIG FIG. 1 or whose switching contacts are turned off.

The output signals IIN and SAUS are forwarded to a not shown motor drive control of the motor drive 30, which depends on the logic states the two signals activate the motor drive 30 and the electric switch can turn on or off.

The FIG. 4 shows a second embodiment of a control device, which in the motor drive 30 according to FIG. 1 can be used. The control device 200 comprises two evaluation modules 210 and 220, which are respectively acted upon by the changeover signal SU and the operating switch position signal SA.

The evaluation modules 210 and 220 may be formed by a microprocessor or a microcontroller, for example.

The evaluation module 210 generates on the output side a turn-on signal SEIN for switching on the electrical switch 10 or for switching on the current I according to FIG FIG. 1 when the Bedienschalterstellungssignal SA has a logic "1" and the Umstellsignal SU changes from a logical "0" to a logical "1". In this case, it is again assumed by way of example that the changeover signal SU has a logical "0" when the electrical switch 10 according to FIG FIG. 1 should be off, and a logical "1", when the electrical switch according to FIG. 1 should be turned on.

The time profile of the turn-on signal HIS is exemplary in the FIG. 5 shown. It can be seen that the turn-on signal SEIN has a logical "1" only in the time slots between t4 and t5 and between t10 and t11, whereas in all other time slots the turn-on signal SEIN has a logic "0".

The second evaluation module 220 according to FIG. 4 operates analogously, but it is intended to produce on the output side a turn-off signal SAUS, in each case when the Bedienschalterstellungssignal SA has a logic "1" and the Umstellsignal SU shows a negative signal edge. The time profile of the switch-off signal SAUS is exemplary in the FIG. 6 shown.

The output signals SEIN and SAUS of the two evaluation modules 210 and 220 of the control device 200 are forwarded to a not shown motor drive control of the motor drive 30, depending on the logical states of the two signals HIS and SAUS activate the motor drive 30 and the electric switch on or can turn off.

While the invention has been further illustrated and described in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

10

switch

20

switch housing

30

motor drive

40

disengaging element

50

control switch

60

first control signal input

70

second control signal input

100

control device

110

evaluation module

120

AND gate

130

AND gate

200

control device

210

evaluation module

220

evaluation module

I

electricity

M

first switching position

R

second switch position

L

third shift position

SA

Control switch position signal

SAUS

switch-off

BE

switch-on

SR

Remote control activation signal

SRB

Enable signal

SU

change-over signal

t

Time

Claims (11)

Electric switch (10), in particular electrical circuit breaker, with a motor drive (30), characterized in that - The motor drive (30) has an operating switch (50) which allows at least two switching positions (M, R), wherein the operating switch (50) in a first switching position (M), a manual operation of the motor drive (30) and in a second switching position (R) allows remote control of the motor drive (30) via a control signal (SR, SU) at a control signal input (60, 70) of the motor drive (30), and - The motor drive (30) having a control switch (50) and the control signal input (60, 70) in communication control means (100, 200) which is configured such that a remote-controlled actuation of the electrical switch (10) through the Motor drive (30) only permits when the operating switch (50) assumes its second switching position (R) and at the same time the control signal (SR, SU) at the control signal input (60, 70) makes a signal change. Electric switch according to claim 1,
characterized in that - The control signal (SR) at the control signal input (60) may have a signal deactivating the remote control signal and a signal activating the remote control information and - The control device (100, 200) is designed such that it allows a remote-controlled actuation of the electrical switch (10) by the motor drive (30) only when the operating switch (50) assumes its second switching position (R) and the control signal ( SR) changes from the remote control deactivating signal information to the remote control activating signal information. Electric switch according to claim 2,
characterized in that - The control signal (SR) at the control signal input (60) can have a signal deactivating remote control signal level and a signal level activating the remote control, and - The control device (100, 200) is designed such that it allows a remote-controlled actuation of the electrical switch (10) by the motor drive (30) only when the operating switch (50) assumes its second switching position (R) and the control signal ( SR) from which the remote control deactivating signal level to the remote control activating signal level changes. Electric switch according to one of the preceding claims,
characterized in that - The control signal (SU) at the control signal input (70) may have a switch-off the switch requesting switch-off information and a switch-on requesting the switch-on information and - The control device (100, 200) is designed such that it causes switching on of the electrical switch (10) by the motor drive (30) only when the operating switch (50) assumes its second switching position (R) and at the same time the control signal of the switch-off information for the switch-on information changes. Electric switch according to claim 4,
characterized in that - The control signal (SU) at the control signal input (70) may have a turn-off level requesting the switching-off of the switch and a switch-on level requiring the switching on of the switch, and - The control device (100, 200) is designed such that it causes a switching on of the electrical switch (100) by the motor drive (30) only then, when the operating switch (50) assumes its second switching position (R) and at the same time changes the control signal (SU) from the switch-off level to the switch-on level. Electric switch according to one of the preceding claims,
characterized in that the control device (100, 200) is designed such that, after a change of the switching position of the control switch (50), it disregards the control signal at the control signal input for a predetermined blocking time. Electric switch according to one of the preceding claims,
characterized in that the control switch (50) in addition to the first and second switching position, a third switching position (L), in which the motor drive (30) and a switching of the electrical switch (10) by the motor drive (30) are blocked. Electric switch according to one of the preceding claims,
characterized in that - The second switching position (R) of the control switch (50) between the first and third switching position (M, L) of the control switch (50) is arranged and - A changeover of the control switch (50) from the first to the third switching position or a changeover from the third to the first switching position an intermediate activation or passing of the second switching position (R) requires. Electric switch according to one of the preceding claims,
characterized in that - The motor drive (30) on a switch housing (20) of the switch (10) held by means of a latching device which makes it possible to remove the motor drive by unlocking the latching device, - The latching device has at least one operator-actuatable Entrastelement (40), with which the latching device can be unlocked and a removal of the motor drive is enabled, and - The Entrastelement causes in a user-side operation both the unlatching of the latching device and a changeover of the control switch in the second switching position. Electric switch according to one of the preceding claims,
characterized in that the control device is formed by a microprocessor or a microcontroller or at least also includes such. Motor drive, in particular for an electrical switch according to one of the preceding claims,
characterized in that - The motor drive (30) has an operating switch (50) which allows at least two switching positions (M, R), wherein the operating switch (50) in a first switching position (M), a manual operation of the motor drive (30) and in a second switching position (R) allows remote control of the motor drive (30) via a control signal (SR, SU) at a control signal input (60, 70) of the motor drive (30), and - The motor drive (30) having a control switch (50) and the control signal input (60, 70) in communication control means (100, 200) which is configured such that a remote-controlled actuation of the electrical switch (10) through the Motor drive (30) only permits when the operating switch (50) assumes its second switching position (R) and at the same time the control signal (SR, SU) at the control signal input (60, 70) makes a signal change.

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