JP2000268695A - Tripper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tripper capable of being easily installed by opening a contact of a circuit breaker to be coupled after the detection of residual current exceeding a preset limit by a detecting device capable of installing auxiliary devices for circuit breaker on both sides having existence of residual current circuit breakers. SOLUTION: An enclosure is constituted of a first base part 1 having a plurality of pivots and a second part 14 to be a cover. A plurality of vertical teeth 15 of the base 1 and a sheet 16 of the corresponding cover 14 are connected by a snap function. An insulating enclosure stores a mechanism 100, has two supporting functions and has an self-sustaining modular structure. A circuit breaker is provided with a connectable tripper as a single block. As a result, components existing at the outside of the tripper are not affected, each component can be directly interposed and all changes or displacements between assembly processes can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a tripping device for opening the contacts of a coupled circuit breaker when a residual current exceeds a preset limit.

[0002]

2. Description of the Related Art Generally, a trip device according to the present invention includes a chain mechanism that is activated when a residual current above a preset limit occurs in an inserted electrical system.
In particular, the presence of this residual current is indicated by a magnetically-biased relay that operates a chain of trip devices by a sensing device, typically by an actuator.
polarized relay). In turn, the trip device transmits the force received from the actuator to the coupled circuit breaker, amplifies it appropriately, and causes the circuit breaker contacts to open.

[0003] The trip device must meet specific requirements determined by applicable statutory provisions and specific application requirements.

In particular, statutory provisions require a tripping device ("free tripping mechanism") that can actuate at the time when the knob that operates the circuit breaker to be coupled is blocked. Furthermore, when the electrical duration of the circuit is restored after the opening of the contacts by the residual current, the trip device is reset and intervenes before the contacts of the circuit breaker are closed again. In this way, if the dangerous state persists, the tripping device prevents a new operating state from occurring.

[0005] In the state of the art, to meet this condition, using a known type of tripping device,
It is not at all satisfactory because it imposes considerable configuration changes on the chain system of the circuit breaker to which the device is coupled.

From an application point of view, the trip device is
It is generally installed to be connected to a magnetothermal circuit breaker so as to provide a single device with protection against short circuits, thermal overload, residual current, and the like. In turn, the electro-magnetic circuit breaker is connected to two suitable auxiliary devices of the conventional type, called active or passive respectively depending on whether it acts on the circuit breaker, and takes action by commands received from said circuit breaker, Or take action. For example, the active auxiliary device can be constituted by a parallel tripping relay or by an undervoltage relay that senses an electric mains voltage below a critical threshold and opens a circuit breaker.

[0007] One solution for coupling the circuit breaker with the auxiliary device is to place the auxiliary device on two sides of the circuit breaker. In particular, referring to the front view of the circuit breaker, the active assist device always
The passive auxiliary device is mounted on the same side as the circuit breaker, for example on the left side, and the passive auxiliary device is mounted on the right side on another side. This solution is particularly advantageous because, in practice, it is possible to use an auxiliary device-circuit breaker transmission shaft which is easy to install, simple to manufacture mechanically and inexpensive. If not, the construction becomes considerably more complicated and the assembly difficulties increase considerably.

If the plant configuration includes the installation of a net residual current circuit breaker, when residual current occurs,
The trip device opens the electromagnetically driven circuit breaker in addition to the residual current circuit breaker. However, if the contacts of the electro-thermal circuit breaker open for any other reason, for example, by an interventional impact action transmitted by an active auxiliary device, or by a short circuit, or for any other reason, the tripping device shall be connected to the auxiliary device. Acts as a transmission bridge between the electromagnetic circuit breaker and the electromagnetic thermal circuit breaker. In practice, the net residual current circuit breaker is bypassed so that only the electromagnetic thermal circuit breaker is opened.

In the state of the art, trip devices of the known type cannot meet this requirement. As a practical matter, this prevents the provision of an electromagnetic thermal circuit breaker with auxiliary devices on the residual current side, resulting in a stack of auxiliary devices on a single side, resulting in a technical failure.

Another disadvantage of the known type of trip device is that it does not have a modular construction.
That is, they are actually installed directly inside the enclosure of the interlocking circuit breaker. Thus, the assembly process is complex and any intervention to change or displace components of the chain of trip devices affects components external to the device.

The intent of the present invention is to provide a circuit breaker coupled after detection of a residual current exceeding a preset limit by means of a detection device which makes it possible to provide auxiliary devices for the circuit breaker on both sides of the circuit breaker. Providing a tripping device for opening the contacts of the
If the opening of the contacts is not due to the detection of the residual current, in particular, it is possible to bypass the residual current circuit breaker chain system.

[0012] Within this intent, it is an object of the present invention to connect the circuit breaker as a separate block so that any intervention in the device itself does not affect components external to the device in any way. SUMMARY OF THE INVENTION It is an object of the present invention to provide a tripping device for opening the contacts of a circuit breaker to be coupled after detection of a residual current exceeding a preset limit by means of a detection device having a self-supporting modular structure capable of being operated.

It is another object of the present invention to provide a circuit breaker coupled after detecting a residual current exceeding a preset limit by a sensing device whose assembly is simpler and substantially mechanically performed than known devices. The object is to provide a trip device for opening the contacts.

It is another object of the present invention to provide a method for controlling a circuit breaker after closing of a contact due to a residual current condition and before closing the circuit breaker.
To provide a tripping device for opening the contacts of the coupled circuit breaker which can be intervened, in order to keep the residual current above the preset limit but to avoid the return of the electrical duration.

Another object of the present invention is to provide a sensing device capable of operating at that time when an operating knob of a circuit breaker to be coupled is blocked, after detecting a residual current exceeding a preset limit. The purpose of the present invention is to provide a trip device for opening a contact of a circuit breaker to be used.

[0016] Another object of the present invention is to be combined with a highly reliable, relatively easy to manufacture and competitive cost sensing device after sensing residual currents beyond a preset limit. An object of the present invention is to provide a trip device for opening a contact of a circuit breaker.

SUMMARY OF THE INVENTION This intent, these objects, and others which will become apparent hereinafter, are for the purpose of opening the contacts of a coupled circuit breaker after detection of a residual current exceeding a preset limit by a sensing device. Wherein the trip unit comprises an enclosure for accommodating and supporting the chain mechanism;
The linkage mechanism is geometrically connected to each other and comprises an operating lever and a trip lever which are both pivoted at a first pivot of the enclosure, the operating lever being actuatable by an actuator operated by the sensing device. An indicator lever coupled to an operating spring and a transmission lever, wherein the indicator and the transmission lever are operatively connected to each other, and both are pivoted at a second pivot of the enclosure, wherein the transmission lever is An engagement lever having a coupling pivot for coupling to a chain system of a circuit breaker to be coupled, the coupling lever being geometrically coupled to the indicator lever, and being removably connected to the trip lever. The operation of the actuator causes the release lever to be released from the engagement lever. The actuating lever and the release lever are simultaneously co-rotated so as to release the indicator lever rotating about the second pivot by the thrust of the operating spring, and at least along the rotating part and with it the rigid transmission lever. Moving, transmitting the movement to the circuit breaker and opening its contacts, the transmission lever can rotate freely with respect to the indicator lever under the command to open the contacts of the circuit breaker not due to the detection of residual current It is characterized by.

The device envisaged for this makes it possible to provide a circuit breaker with auxiliary devices on both sides where the residual current circuit breaker is located, especially if the opening of the contacts is not due to the detection of residual current. It allows bypassing the mechanical system of the current circuit breaker.

Further features and advantages of the present invention will become apparent from the description of the preferred but non-limiting embodiment of the trip device according to the invention, which is illustrated by way of example only and not by way of limitation in the accompanying drawings. Would.

BEST MODE FOR CARRYING OUT THE INVENTION A trip device according to the present invention is connected to an electromagnetic thermal circuit breaker which is the subject of Japanese Patent Application No. Hei 10-319406 described herein by reference. Particularly suitable for: That is, the apparatus is described with reference to this particular application without in any way limiting the scope of this application.

Referring to the above figures, the trip device according to the present invention comprises an insulating enclosure, generally designated by the reference numeral 100, and in which a suitable linkage mechanism described in detail below is housed. ing.

In particular, as shown in FIG. 1, the enclosure is suitable for facilitating the placement and support of two parts that can be combined with one another, namely the various parts that make up the chaining mechanism. The first base portion 1 has a plurality of pivots, and the second portion 14 mainly functions as a cover. The two parts are formed on the base 1 and cover 1
4 are connected by a plurality of vertical teeth 15 which are geometrically connected by a snap function to a corresponding sheet 16 formed in the same. That is, the mutual assembly of the two parts is finally finished by ultrasonic welding. With this solution, the insulating enclosure is provided with the mechanism 10
A self-supporting modular structur that has two functions to accommodate and support
e), making it possible to provide at the end of the assembly a trip device which can be connected as a single block to the circuit breaker to be joined. This architectural solution also allows for direct intervention on individual components and any changes or displacements during the assembly process without affecting components external to the trip device. . In addition, the assembly of the various components is simplified and makes it possible to have a dedicated stock of the device suitable for the particular application.

As shown in detail in FIG. 1, the device comprises an operating lever 3 having a cylindrical seat 38 pivoted on a first pivot 18 provided on the base 1. Extending from the sheet 38 are three arms 3 ', 3 ", 3"' that are angularly spaced. The operating lever 3 detects any residual current higher than the preset limit and operates the actuator accordingly, for example,
It is operatively connected to a current sensor constituted by an electromagnetically activated polarized relay. For example, as shown in FIG. 2 to FIG.
Release pin 17 colliding with arm 3 '(see FIG. 2)
By the chain mechanism 10 in the manner described below.
Operate 0 The second arm 3 "of the operating lever 3 is connected to the first arm 3 of the operating spring 2 for an operation which will be described in detail later.
It has a molded end 60 that can interact with the end 2 ′ and an abutment wall 51 suitable for being geometrically connected to a tooth 50 formed on the surface of the trip lever 4.

The trip lever 4 further pivoted by the first pivot 18 has a first end shaped to have a cylindrical seat 43 and a corresponding hook shape formed on the surface of the engagement lever 8. It has a single arm 4 'provided with a projection 27 and a second end shaped to have a nose-shaped projection 26 suitable for geometrically engaging. The arm 4 ′ further has a raised wall 47 on which the first end 40 ′ of the first position spring 40 acts at a substantially central position, and a second position which is located on the opposite side to the nose-shaped projection 26. It has a raised portion 20 on which the first end 5 'of the position spring 5 acts. The first position spring 40 is arranged around the seat 43 so as to have a second end 40 ″ which presses against the third arm 3 ″ ″ of the operating lever 3. Thus, the first position spring 40 pushes the operating lever 3 to rotate counterclockwise at one end and pushes the release lever 4 to rotate clockwise at the other end. In addition, the two levers 3 and 4 are moved towards each other,
And the abutment wall 51 maintains bearing coupling.

In turn, the second position spring 5 is arranged around a third pivot 19 fixed to the base 1 so as to have a second end 5 ″ which presses against a retainer 48 provided on the base 1. Thus, the second position spring 5 rotates clockwise and pushes the release lever 4 so that the mutual engagement between the engagement lever 8 and the release lever 4 is easily maintained. .

Another advantage of the device according to the invention is due to the fact that the position spring 40 is designed so as to simultaneously absorb the vibrations susceptible to the device. Further, as the dimensions of the actuator operating the device change, the force required to trip and reset the actuator changes accordingly. That is, in the device according to the invention, these changes are avoided by using position springs 5 of different stiffness without affecting other components of the chain system. This clearly allows a high adaptability in the application.

The operating spring 2 is fixed to the base 1 of the enclosure such that the first end 2 ′ is inserted into a slot 52 formed in the surface of the indicator lever 6.
It is arranged around the pivot 21. The second end 2 ″ of the spring 2 is inserted into a seat 22 formed on the base element 1.

The indicator lever 6 is also connected to the second pivot 2
1 and has, in addition to the slot 52, a substantially cylindrical hollow seat 75 for pivoting at the pivot 21.
Two angularly spaced arms 6 ′ and 6 ″ protrude from the seat 75. In particular, the first arm 6 ′ of the indicator lever 6 is at the rotating end carried by the actuating spring 2. Has a shaped end 23 suitable for placing itself in the opening formed in the enclosure and visually indicating that the contacts have opened with a residual current higher than a preset limit. There is a hole 110 for connecting to a pivot 111 on a contact lever 115. In order, the second arm 6 ″.
Has a pivot 31 which is geometrically connected to a corresponding seat 30 formed on the engagement lever 8. further,
The indicator lever 6 has an outer surface of the seat 75,
There are two projecting blocks. That is, the first block 4
5 (shown in FIG. 4) are suitable for abutting a retainer 55 formed on the base 1 of the enclosure to stop the rotation of the indicator lever 6, and a second block 53
Are provided for coupling to corresponding teeth 54 formed on the transmission lever 7. In particular, the coupling between the second block 53 and the teeth 54 allows to form a one-way constraint between the indicator lever 6 and the transmission lever 7 of the operation described below.

The transmission lever 7 has a hollow cylindrical seat 46 for pivoting at the second pivot 21 and a pivot 90 for connection with a chain system of circuit breakers connected to a tripping device.

According to a particular application, for example, when a tripping device is used with a differential block, the third position spring 9 shown only in FIG. 1 acts on a pivot 25 formed on the transmission lever 7. It can be arranged around the outer surface of the seat 46 so as to have a first end 9 ′ and a second end 9 ″ acting on the forming wall 28 of the engagement lever 8. 8 also has a hollow cylindrical wall 3 which geometrically meshes with the pivot 31 of the indicator lever 6
0 and a sheet 32 for the end insertion of the U-shaped element 12. The U-shaped element 12 can have a curvilinear contour, as shown in FIG. 1, or a linear contour, as shown in FIGS.

In these cases, the advantage is that the second position spring 5 and the third position spring 9 are structurally identical, despite acting differently from one another, and therefore provide an advantageous scale of advantage, and Further, it is possible to simplify the structural structure of the device.

The tripping device according to the present invention further comprises a first knob 10 on the surface of which a hollow cylindrical pivot 63 pivoted by a fourth fixed pivot 33 of the base 1 and a circuit coupled with said device. Each has a pin 34 which is rigidly connected to a knob for operation of the breaker.
The second knob 11 is connected to the knob 10 by the cylindrical sheet 35.
Are geometrically connected to a hollow pivot 63 of Around the seat 35, a cavity 36 formed in the knob 11
There is a return spring 13 having an end inserted into the spring.

The second knob 11 also has a U-shaped element 12 to facilitate resetting the device after intervention to open the contacts of the circuit breaker to be coupled.
And a protruding block 62 capable of interacting with a corresponding abutment wall 61 formed on the surface of the first knob 10. At the end of the reset operation, the block 62 abuts a retainer 63 formed on the base 1 of the enclosure.

With reference to FIGS. 2 to 6, the operation of the device when a residual current exceeding a preset level occurs will be described.

Starting from the operating state shown in FIG. 2, that is, when a residual current exceeding the preset level occurs for the intervening tripping device, the pin 17 is actuated and strikes the arm 3 ″ of the actuating lever 3; , Reference arrow 1
Rotate around pivot 18 in the direction indicated by 01.

As shown in FIG. 3, due to the geometrical engagement between the abutment wall 51 and the teeth 50, the operating lever 3 simultaneously pulls the release lever 4 towards itself and in the same direction. It is rotated to release it from engagement with the engagement lever 8. Thus, the rest of the mechanism 100 is free to move. In particular, the indicator lever 6
Is rotated by the thrust of the operating spring 2 in the direction indicated by the arrow 102 and is connected to the transmission lever 7 by a block 53 pushing against the teeth 54 and moves it at least along the rotating part. Further, during said rotation,
By performing a translational movement, the indicator lever 6 pushes a contact lever 115 which is external to the trip device and acts on a spring in a test circuit, not shown. The precise translation of the contact lever 115 is assisted by two guides 116 formed on the base 1.

In turn, the lever 7 transmits motion to the chain system of the circuit breakers to be coupled, causing the contacts to open. As shown in FIG. 4, the block 45 is
When it comes into contact with 5, the rotation of lever 6 ends. In this position, the molded end 23 is located at the opening of the confinement enclosure and externally and visually indicates that the circuit breaker has been intervened by residual current.

As an advantage, during its movement, the end 2 'of the operating spring 2 strikes the shaping end 60, as shown in FIG. And press it. The lever 3 remains in this position until the device is reset and acts as a reset device for the operating element. Furthermore, if the operating element is a polarized relay, any contamination for it is avoided. In addition, the thrust of the position spring, in particular the spring 40, allows the tooth 5
0 abuts against abutment wall 51 and levers 3 and 4 return directly to the mutual contact.

If, during these steps, the operating knob of the circuit breaker to be coupled is blocked, the knob 10 which is firmly connected by the pivot 28 is also blocked. That is, as a result, the chain mechanism 100
Has no possibility to perform a new exercise and stays in the position shown in FIG. If, during the above-mentioned actuation steps, instead, this condition does not occur, the knob 10 starts with a certain delay due to its inertia after the movement of the coupled circuit breaker and is indicated by the arrow 103 In the direction shown in FIG. The return spring 13 causes the knob 11 to rotate in the direction indicated by the arrow 103, and the U-shaped element 12 pushes the engagement lever 8. Thus, the hook-shaped protrusion 27 moves past the protrusion 26 and reaches the position shown in FIG. In this position, the device is reset.

During the rotation, the lever 6 hardly moves due to the rigidity of the operating spring 2 to which it is connected.

The reset is performed by directly acting on the operating knob of the circuit breaker which transmits the movement to the knob 10. As shown in FIG. 6, knob 10 rotates in the direction indicated by arrow 104 such that abutment wall 61 presses against protruding block 62 of knob 11. Thus, the knob 11 further rotates in the direction of the arrow 104, and the engagement lever 8 is rotated by the U-shaped element 12 until the hook-shaped protrusion 27 contacts the protrusion 26. By following the movement of the chain system of the circuit breakers to be coupled, the transmission lever 7 moves
05, and the interaction between the tooth 54 and the block 53 causes the indicator lever 6 to rotate.
Move it back to its initial position. In order, lever 6
Moves the contact lever 115, reloads the springs 2, returns them to their initial position and releases the lever 3 from the pin 17.
And return to the initial position exactly. At the end of the rotation, the projecting block 62 abuts a retainer 73, as shown schematically in FIG.

Advantageously, the device is shaped so that it is reset and a new intervention takes place before the contacts of the associated circuit breaker close. In this way, it is ensured that the contacts are immediately reopened if the residual current exceeds a preset safety limit when the current flow of the electrical circuit is restored.

Advantageously, if the intervention of the circuit breaker is not due to the presence of the residual current, but in any other operating state, due to the residual current, for example by a command sent by an auxiliary device, the transmission lever 7 is , Can be freely rotated with respect to the indicator lever 6. In this case, the lever 7 is moved from the auxiliary device by a coupling pin passing through a slot 91 formed in the base 1, and the lever 2 is provided with a slot 2 provided in the lever 7 itself.
4 is inserted. In this state, the transmission lever 7
Moving in the direction indicated by arrow 106 in FIG. 2, the rest of the chain mechanism transmits motion to the coupled circuit breaker without being affected by motion at any point. In this way, the residual current circuit breaker, if provided, is configured as a practical auxiliary device and the chain system is completely bypassed.

A further advantage of the tripping device according to the invention is that it is connected to a multipole electromagnetically driven circuit breaker having a neutral pole, irrespective of the arrangement of the poles, for example on the right or on the left. Is given by the fact that it is possible. In this case, it is indeed satisfactory to assemble the chain system by rotating 180 ° C. without making any changes in the configuration of the components.

As a practical matter, the tripping device according to the invention can be provided with a circuit breaker which is combined with a circuit breaker with auxiliary devices on both sides where the net residual current circuit breaker is located, so that it is fully intended and intended. It turns out to be achieved. The device also has a free-standing modular structure which can be connected as a separate block to the circuit breaker and whose assembly is simple and almost automatic.

Advantageously, in addition to being particularly suitable for direct connection to an electrothermal circuit breaker, the tripping device thus conceived is furthermore used for residual current blocks and also commonly used. It can be used effectively in a net residual current circuit breaker.
Every innovative function or inventive aspect of the device is
Note that this is achieved by using commercially available elements or materials that are very inexpensive.

Industrial Applicability The tripping device thus conceived allows for numerous modifications and variations, all of which are within the scope of the inventive concept and all details , And is displaceable with other technically equivalent elements.

In practice, the materials and dimensions used can be any, depending on the requirements and the state of the art.

[Brief description of the drawings]

FIG. 1 is an exploded view of a trip device according to the present invention.

FIG. 2 is a schematic side view of a chain mechanism used in a trip device according to the present invention in an activated state.

FIG. 3 is an illustration of the chaining mechanism of FIG. 2 during an intervention to open the contacts of a circuit breaker to be coupled;

FIG. 4 is an illustration of the chaining mechanism of FIG. 2 during an intervention to open the contacts of a circuit breaker to be coupled;

FIG. 5 is an illustration of the chaining mechanism of FIG. 2 during an intervention to open a contact of a circuit breaker to be coupled;

FIG. 6 is a side view of the chain mechanism of FIG. 2 during a reset after intervention to open a circuit breaker;

FIG. 7 is a perspective view of the base of the enclosure used in the device according to the invention.

Claims (11)

[Claims] 1. A trip device for opening contacts of a circuit breaker to be coupled after detection of a residual current exceeding a preset limit by a sensing device, said trip device containing a chain mechanism; And a supporting enclosure, wherein the linkage mechanism is geometrically connected to each other and the first of the enclosures.
An actuating lever and a trip lever, both pivoted on a pivot, the actuating lever being operatively connected to an actuator operated by the sensing device, an indicator lever to which an actuating spring is coupled, and a transmission lever. A coupling pivot for coupling the indicator and the transmission lever operatively to each other, both pivoted at a second pivot of the enclosure, and coupling the transmission lever to a chain system of a circuit breaker to be coupled And an engagement lever geometrically connected to the indicator lever and detachably connected to the release lever, wherein the operation of the actuator causes the release lever to be disengaged from the engagement lever. Disengaged and the second pivot turn is caused by the thrust of the operation spring. Rotating the operating lever and the trip lever simultaneously so as to release the rotating indicator lever, and moving the transmission lever at least along the rotating part and therewith firmly, thereby causing the circuit breaker to move its motion. And the contacts are opened, the transmission lever being rotatable with respect to the indicator lever under a command to open the contacts of the circuit breaker not due to the detection of residual current. Remover. 2. The self-contained modular structure, wherein the containment or support enclosure comprises two parts, a base and a cover, respectively, the two parts being able to be connected as a single block to the circuit breaker. 2. The trip device according to claim 1, wherein the trip device is adapted to be combined with each other to form 3. The operating lever has a cylindrical seat pivoted at the first pivot, from which an angle is formed,
Three mutually spaced arms projecting, the three arms being a first arm adapted to functionally interact with the actuator; a shaped end operable to interact with the operating spring; A second arm, each having an abutment wall geometrically coupled to a corresponding tooth formed on a surface of the trip device; and a first arm disposed about a seat of the trip lever.
2. The trip device according to claim 1, wherein the end of the position spring is a third arm that acts. 4. The trip lever has an end shaped to have a nose-shaped protrusion, the nose-shaped protrusion having a corresponding hook-shaped protrusion formed on the surface of the engagement lever. 3. The trip device according to claim 1, wherein the trip device is adapted to engage with a part. 5. The trip lever has a raised wall at a substantially central position on which a second end of the first position spring acts, and the first position spring is provided between the abutment wall and the teeth. A trip device according to claim 4, characterized in that it is suitable for promoting a geometric connection between the two and for maintaining the mutual engagement of the engagement lever and the trip lever. . 6. The arm of the trip lever is located at a substantially central position and opposite to the nose-shaped protrusion, and has a raised portion on which a first end of a second position spring acts. The second position spring is pivoted at a third pivot provided on the base, and the second end of the second position spring acts on a retainer provided on the base itself. The trip device according to claim 4 or 5, wherein 7. The indicator lever has a hollow, substantially cylindrical seat for pivoting at the second pivot, from which two angularly spaced arms project from which the two arms are connected. A first arm having a shaped end suitable for placing itself in an opening formed in the enclosure, with a rotating end conveyed by a working spring to visually indicate that the contact has opened due to residual current. A first arm provided with a hole for connection to a fourth pivot provided on a contact lever; a second arm having a fifth surface provided on a surface thereof for connecting to a corresponding seat of the engagement lever; The trip device according to claim 1, further comprising a pivot. 8. A projecting block formed on an outer surface of the substantially cylindrical sheet, and a first block formed on the base for stopping rotation of the indicator lever. , The second block is suitable for coupling to a corresponding tooth formed on the transmission lever, and the coupling between the second block and the tooth allows the indicator lever and the tooth to be connected. 8. The trip device according to claim 7, wherein a one-way coupling is formed between the transmission lever and the transmission lever. 9. A first knob having a pin for connecting the coupled circuit breaker to a knob for operation and a hollow cylindrical pivot pivoted on a sixth pivot formed on the base. Claim 1 characterized by the following:
3. The trip device according to claim 1. 10. A second knob connected to an outer surface of said hollow cylindrical pivot and operatively connected to said engagement lever by a U-shaped element, wherein a return spring is provided on said second knob.
10. The trip device according to claim 9, wherein the trip device is coupled to a knob. 11. The method according to claim 1, wherein the second knob is adapted to open the circuit breaker contacts with the residual current.
A corresponding abutment wall formed on the surface of the first knob to facilitate resetting the device and to abut a retainer formed on the base at the end of resetting the device 11. The trip device according to claim 10, comprising a protruding block capable of interacting with the trip unit.