EP3525226B1 - Module for a rotary drive of an electrical switch, electric switch with such a module and method for switching an electric switch - Google Patents

Description

The invention relates to a module for a rotary drive of an electrical switch, an electrical switch with such a module, and a method for switching an electrical switch.

When the molded case circuit breakers are switched off, the circuit of an undervoltage release should typically be isolated from the voltage source on all poles with auxiliary switches. It must be ensured that when the molded case circuit breaker handle leaves the "OFF" position, the circuit of the undervoltage release is reconnected to the voltage source.

To solve this problem, for example, the auxiliary switches can be installed next to the undervoltage release in molded case circuit breaker pockets. However, this concept requires additional volume in the molded case circuit breaker pockets at the expense of space for additional internal accessories. There must also be a certain distance between leaving the "OFF" position of the molded case circuit breaker and the undervoltage release "latched" position.

Furthermore, rotary drives can be retrofitted by the customer. However, this concept requires additional volume in the rotary drive and the presence of a certain travel distance between leaving the "OFF" position of the molded case circuit breaker and the undervoltage release "latched" position.

In the DE 198 12 503 C1 discloses a module according to the preamble of claim 1, and a rotary operated circuit breaker with a leading auxiliary switch, wherein when switched on the auxiliary contacts of the auxiliary switch are actuated before the main contacts. An actuating attachment is provided, which contains a drive pinion, which is rotationally actuated by an actuating member, and a first toothed rack which is mounted to be longitudinally displaceable and meshes with the drive pinion and which actuates the auxiliary switch. Also included is a second toothed rack, which is connected to the first toothed rack and lags behind in the switch-on direction, as well as an output pinion which is assigned to the second toothed rack and is connected to a drive shaft for the switching mechanism of the circuit breaker.

It is therefore the object of the invention to provide an alternative solution for ensuring that the voltage supply of an undervoltage release is switched on. According to the invention, this object is achieved by the module for a rotary drive of an electrical switch according to claim 1 . Advantageous configurations of the module according to the invention are specified in dependent claims 2 to 5. The object is also achieved according to the invention by the electrical switch with a module according to claim 6. The object is also achieved according to the invention by the method for switching an electrical switch according to claim 7 .

The module according to claim 1 for a rotary drive of an electrical switch, wherein the rotary drive is actuated by means of a rotary handle, in that the rotary handle moves a rotary shaft of the rotary drive between at least two switch positions, comprises at least one auxiliary switch, the module between the rotary drive and can be mounted on the rotary handle, with the at least one auxiliary switch being switched ahead of a rotary movement of the rotary handle before one of the switch positions is reached when the module is mounted between the rotary drive and the rotary handle.

The module includes a cam disk and an actuator disk coupled to the cam disk. A gate is in the cam and a pin running in the gate is attached to the actuator disc. Alternatively, a gate in the actuator disk and a pin running in the gate are attached to the cam disk.

The module according to the invention does not occupy any space in the undervoltage release, molded case circuit breaker or rotary drive. By decoupling the lead by the module, a compact design of the molded case circuit breaker or the accessories is only possible by bringing the undervoltage release "latched" position close to the "OFF" position of the molded case circuit breaker.

In one embodiment of the module according to the invention, the at least one auxiliary switch is switched either from "actuated" to "not actuated" or from "not actuated" to "actuated".

In one embodiment, a restoring spring brings the cam disk and the actuating disk into a predefined position relative to one another.

In a further refinement, the at least one auxiliary switch is switched by a radial thickening on the cam disk.

In a further embodiment, the module comprises two auxiliary switches which, when the rotary handle is rotated, are switched one after the other ahead of one of the switch positions when the module is mounted between the rotary drive and the rotary handle. The advantage here is that the integration of several auxiliary switches in the module allows a greater variety of leading auxiliary switches in the system.

The electrical switch according to claim 6 comprises a module according to the invention and a rotary drive which is actuated by means of a rotary handle in that the rotary handle moves a rotary shaft of the rotary drive between at least two switch positions, and the module between the rotary drive and the rotary handle is mounted.

• Drehen des Dreh-Handle in Richtung einer Schalterstellung, so dass der mindestens eine Hilfsschalter betätigt wird, und danach
• weiteres Drehen des Dreh-Handle in die Schalterstellung.

The method for switching the electrical switch according to claim 7 comprises an electrical switch according to the invention Switch with mounted rotary actuator on which an inventive module is mounted and the rotary handle is mounted on the module, with the steps:

• Rotating the rotary handle toward a switch position such that the at least one auxiliary switch is actuated, and thereafter
• further turning the rotary handle to the switch position.

The properties, features and advantages of this invention described above, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of the exemplary embodiments, which are further explained in connection with the figures.

Figur 1

Prinzipskizze des erfindungsgemäßen Moduls mit Drehantrieb, Dreh-Handle und elektrischem Schalter mit Handle;

Figur 2

erfindungsgemäßes Modul mit Drehantrieb und Dreh-Handle;

Figur 3

erfindungsgemäßes Modul mit Kurvenscheibe und Betätigerscheibe;

Figur 4

Sequenz zum Schalten des elektrischen Schalters von "OFF"-Stellung in "ON"-Stellung;

Figur 5

Schalten des elektrischen Schalters von "ON"-Stellung in "OFF"-Stellung;

Figuren 6A und 6B

Ein Beispiel nicht gemäß der hier beanspruchten Erfindung von Kurvenscheibe und Betätigerscheibe in zwei unterschiedlichen Stellungen zueinander; und

Figur 7

Verfahren zum Schalten eines elektrischen Schalters.

show:

figure 1

Schematic sketch of the module according to the invention with rotary drive, rotary handle and electrical switch with handle;

figure 2

module according to the invention with rotary drive and rotary handle;

figure 3

module according to the invention with cam disk and actuator disk;

figure 4

sequence for switching the electric switch from "OFF" position to "ON"position;

figure 5

switching the electric switch from "ON" position to "OFF"position;

Figures 6A and 6B

An example not according to the invention claimed here of the cam disc and actuator disc in two different positions relative to one another; and

figure 7

Method of switching an electrical switch.

figure 1 is a schematic diagram of the module 100 according to the invention figure 1 the rotary drive 200 and the undervoltage release 300 are shown. The handle 310 of an electrical switch is moved in a linear motion from the "ON" position to the "OFF" position and vice versa to turn on or off the electrical current. The rotary drive 200 translates the rotary movement of a rotary handle 10 into the linear movement of the handle 310 of the electrical switch. A gear 220 can be provided for this purpose, for example, and a carriage 230 which moves the handle 310 of the electrical switch.

figure 1 also shows the module 100 according to the invention, which is mounted between the rotary drive 200 and the rotary handle 10 and includes an auxiliary switch 110 . When the rotary handle 10 is rotated from, for example, the "OFF" position in the direction of the "ON" position according to the arrow in figure 1 is advanced before reaching, for example, the "ON" position of the auxiliary switch 110 switched.

The auxiliary switch 110 can be switched from either "actuated" to "not actuated" or from "not actuated" to "actuated".

Because the auxiliary switch 110 is switched ahead of time before the “ON” position is reached, for example, the circuit of an undervoltage release 300 can be switched on by the auxiliary switch 110 before the electrical switch switches to the “ON” position.

In figure 2 the module 100 according to the invention is again shown. The rotary drive 200 with the rotary shaft 210 and the rotary handle 10 are also shown. Between rotary handle 10 and the module 100 according to the invention, a display disc 500 is arranged, which the switching positions, for example the "ON" position, "TRIP" position or the "OFF" position.

The module 100 according to the invention also includes a rotary shaft 199 which is mechanically actuated by the rotary handle 10 and is mechanically placed on the rotary shaft 210 of the rotary drive 200 .

figure 3 shows the module 100 according to the invention in more detail. The module 100 comprises a module housing 180; 181, which, for example, 2 parts according to the figure 3 can be trained. Inside the housing 180; 181 the auxiliary switch 110 is arranged. Furthermore, the module 100 comprises a cam disk 150 and an actuator disk 160 coupled to the cam disk 150.

The cam disk 150 is coupled to the actuating disk 160 in such a way that the auxiliary switch 110 is switched in advance before one of the switch positions is reached. The auxiliary switch 110 is switched by a radial thickening 155 on the cam disk 150. This radial thickening 155 is arranged so that the leading switching of the auxiliary switch 110 before reaching a switch position, for example the "ON" position or the "OFF" position , is realized.

Cam disk 150 and actuator disk 160 are coupled as shown in FIG figure 1 . There it is shown that a link 151 is fitted in the cam disk 150 and a pin 161 which is attached to the actuating disk 160 runs in this link 151 . The leading switching of the auxiliary switch 110 can thus be implemented in accordance with the length of the connecting link 151 . Alternatively, a gate in the actuator disk and a pin running in the gate are attached to the cam disk.

According to an example that does not correspond to the invention claimed here, the coupling of the cam disk 150 and the actuator disk 160 can be as shown in FIG Figures 6A and 6B done like a bayonet. The cam 150 with the radial Thickening 155 and the actuator disc 160 on the rotary shaft 210 of the rotary drive 200 touches down and is attached, run into one another like a bayonet up to a certain stop.

The module 100 according to figure 3 also includes a return spring 170, which brings the cam 150 and the actuator disc 160 in a predefined positioning relative to one another.

In figure 4 Fig. 11 shows a cycle from top left, top right, bottom left to bottom right for advanced switching from the "OFF" position to the "ON" position. The handle 10 is thereby transferred from the "OFF" position to the "ON" position. For this purpose, the pin 161 of the actuating disc 160 runs in the connecting link 151 of the cam disc 150. This means that the first movement, shown in the figures top left and top right, only moves the cam disc 150 and the auxiliary switch 110 is switched. Upon reaching the end of the backdrop 151 as shown in the figure 4 Top right and switching the auxiliary switch 110 is also the actuator disc 160, which switches the rotary drive 200 moves. Upon reaching the "ON" position according to the figure 4 bottom left, the electrical switch has been turned to the "ON" position by the rotary actuator 200. If the rotary handle 10 is now released by the operator, the return spring 170 ensures that the cam disc 150 is brought into a predefined position and the rotary handle 10 points to the "ON" position again.

In the figure 4 a second auxiliary switch 120 is shown, and the radial thickening 155 is so pronounced that the two auxiliary switches 110; 120 advanced switching in the system.

In figure 5 Figure 1 shows the sequence for moving the electrical switch from the "ON" position to the "OFF" position. Here, too, the auxiliary switches 110; 120 leading accordingly.

• Drehen 1010 des Dreh-Handle 10 in Richtung einer Schalterstellung, so dass der mindestens eine Hilfsschalter 110; 120 betätigt wird, und danach
• weiteres Drehen 1020 des Dreh-Handle 10 in die Schalterstellung.

The method 100 according to the invention for switching an electrical switch is in figure 7 shown. In this case, a rotary drive 200 is mounted on an electrical switch according to the invention, on which in turn a module 100 according to the invention with a rotary handle 10 is mounted. Between the start 1001 and the end 1002, the method 1000 includes the steps:

• Turning 1010 the rotary handle 10 in the direction of a switch position, so that the at least one auxiliary switch 110; 120 is actuated, and thereafter
• further rotating 1020 the rotary handle 10 to the switch position.

Integrating auxiliary switches 110; 120 in the rotary drive 200 is typically not possible for reasons of space. An integration of the auxiliary switch 110; 120 in the pockets of a molded case circuit breaker is ruled out for reasons of space.

The module 100 according to the invention can be installed between the rotary drive 200 and the rotary handle 10 by the customer. The auxiliary switches 110 are located in this module 100 according to the invention; 120 for early switching of a circuit, for example an undervoltage release 300.

The module 100 has an actuator disk 160 and a cam disk 150 for switching from the "OFF" position to the "ON" position in advance. On the cam disk 150 the customer can mount the rotary handle 10 or a shaft coupling. The cam disk 150 has a freewheel relative to the actuating disk 160, which is implemented via a connecting link 151 and a pin 161 running in the connecting link 151. Due to the freewheel, the cam disk can rotate at a certain angle in relation to the actuating disk 160 are rotated without the actuator disc 160 is moved and thus the electrical switch is switched.

This rotational movement is used to switch the auxiliary switch 110; 120 to switch on a radial thickening 155 on the cam 150 leading. The cam disk 150 is rotated back again via a return spring 170 so that the rotary handle 10 indicates the correct switch position for the molded case circuit breaker. The auxiliary switches 110; 120 can be positioned so that they are actuated in advance when the rotary handle 10 of the rotary drive 200 from the "OFF" position to the "ON" position or from the "ON" position to the "OFF" position is switched. Furthermore, one can by NC or NO contacts in the auxiliary switches 110; 120 decide whether to switch to open or close.

Claims (7)

1. Module (100) for a rotary drive (200) of an electrical switch (300),

   wherein the rotary drive (200) is operated using a rotary handle (10) by way of the rotary handle (10) moving a rotary shaft (210) of the rotary drive (200) between at least two switch positions,

   wherein the module (100) can be mounted between the rotary drive (200) and the rotary handle (10) and comprises at least one auxiliary switch (110; 120),

   wherein the at least one auxiliary switch (110; 120), in the event of a rotational movement of the rotary handle (10), is switched anticipatorily before one of the switch positions is reached when the module (100) is mounted between the rotary drive (200) and the rotary handle (10),

   characterized in that

   the module (100) comprises a cam disc (150) and an operator disc (160) coupled to the cam disc (150) and

   a slotted guide (151) is made in the cam disc (150) and a pin (161) running in the slotted guide (151) is fitted to the operator disc (160), or

   a slotted guide is made in the operator disc and a pin running in the slotted guide is fitted to the cam disc.
2. Module (100) according to Patent Claim 1, in which the at least one auxiliary switch (110; 120) is switched either from "operated" to "not operated" or from "not operated" to "operated".
3. Module (100) according to either of Patent Claims 1 and 2, wherein a return spring (170) moves the cam disc (150) and the operator disc (160) to a predefined position in relation to one another.
4. Module (100) according to one of preceding Patent Claims 1 to 3, in which the at least one auxiliary switch (110; 120) is switched by way of a radial thickened portion (155) on the cam disc (150).
5. Module (100) according to one of the preceding patent claims, wherein the module (100) comprises two auxiliary switches (110; 120) which, in the event of a rotational movement of the rotary handle (10), are switched in succession anticipatorily before one of the switch positions is reached when the module (100) is mounted between the rotary drive (200) and the rotary handle (10).
6. Electrical switch comprising a module (100) according to one of the preceding patent claims, wherein the electrical switch comprises a rotary drive (200) which is operated using a rotary handle (10) by way of the rotary handle (10) moving a rotary shaft (210) of the rotary drive (200) between at least two switch positions, and wherein the module (100) is mounted between the rotary drive (200) and the rotary handle (10).
7. Method (1000) for switching an electrical switch by means of a rotary drive (200) mounted on the electrical switch and on which a module (100) according to preceding Patent Claims 1 to 5 is mounted, and wherein the rotary handle (10) is mounted on the module (100), comprising the steps of

   - rotating (1010) the rotary handle (10) in the direction of one switch position, so that the at least one auxiliary switch (110; 120) is operated, and then

   - further rotating (1020) the rotary handle (10) to the switch position.

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