KR101144585B1 - Trip alarm mechanism for small circuit breaker - Google Patents

Abstract

PURPOSE: A trip alarm apparatus of a miniature circuit breaker is provided to test whether an alarm signal apparatus is normally operated or not without blocking power supply by separately forming a pivot axis of a sub handle with a pivot axis of the manipulating handle. CONSTITUTION: An external case(21) is composed of electrical insulating material. An input terminal(31) of an alarm signal is fixed to the external case. An output terminal(32) of the alarm signal is fixed to the external case. A closed circuit contact point terminal is fixed to the external case. A manipulating handle(22) is installed to the external case than may be rotated. The manipulating handle offers passivity operation means of a miniature circuit breaker to a user. A first lever(27) makes forward or backward to a horizontal direction according to rotation of the manipulating handle.

Description

Trip alarm device of small circuit breaker {TRIP ALARM MECHANISM FOR SMALL CIRCUIT BREAKER}

The present invention relates to a small circuit breaker, and more particularly to a trip alarm device of the small circuit breaker.

Small circuit breakers are power devices that protect lines and loads from fault currents such as overcurrents and short-circuit currents in power circuits of buildings or machine tools.

In such a small circuit breaker, the trip alarm device generates an accident current such as an overcurrent or a short circuit current on the power circuit, and when the circuit breaker trips, the circuit breaker is disconnected by the fault current. The function of monitoring the power supply and alarming the administrator of the trip is required. This function is necessary for the administrator to recognize the trip occurrence, eliminate the cause of the occurrence of the fault current, and restart the power supply.

The present invention relates to such a trip alarm device in a small circuit breaker.

In such a small circuit breaker, the prior art of the trip alarm device has a configuration in which a trip alarm signal is generated by driving the alarm device using the rotational force of the operation handle of the circuit breaker during the trip operation. However, in the trip alarm device of the miniature circuit breaker according to the prior art, the configuration of the device for the rotation operation of the handle and the interlocking operation of the alarm device is complicated, and therefore, a failure often occurs in the interlocking operation, thereby ensuring the operation reliability of the tripping alarm device. There was no problem.

In addition, the trip alarm device of the miniature circuit breaker according to the prior art has a configuration in which the movable contact constituted by the leaf spring provides a conduction path of the circuit, and the leaf spring becomes elastic due to overheating of the movable contact when an accident current occurs on the power circuit. There is a problem in that the movable contactor is permanently irreparably damaged and thus the circuit opening and closing function cannot be resumed.

Accordingly, the present invention solves the problems of the prior art, the object of the present invention is to provide a tripping alarm device of a small circuit breaker that is simple in configuration, improved operation reliability and separately configured a contact spring compared to the prior art. will be.

An object of the present invention is to provide a trip alarm device for a small circuit breaker.

An enclosure formed of an electrical insulation material;

An input terminal of an alarm signal fixed to the enclosure;

An output terminal of the alarm signal fixed to the enclosure;

A normally closed contact terminal irrelevant to an alarm signal fixed to the enclosure;

An operation handle rotatably supported by the enclosure and providing a user with manual operation means of the miniature circuit breaker;

A first lever having an end connected to the operation handle and movable forward or backward in a horizontal direction according to the rotation of the operation handle;

A first pivot plate connected to the other end of the first lever and rotatable in accordance with the forward or backward movement of the first lever;

It is connected coaxially to the first pivot plate, and is rotatable in the same direction as the first pivot plate, and when the small circuit breaker is in an ON position or is turned off by manual operation of the user's operation handle ( A second rotating plate having a first position positioned at an OFF) position and a second position positioned when the small circuit breaker trips;

The first rotating plate and the second rotating plate is axially supported, and rotates in the one direction by rotating the first rotating plate and the second rotating plate in the one direction during a trip operation of the small circuit breaker. Rotating shaft;

A second lever having one end connected to the lower end of the second pivoting plate, the second lever being movable up and down in accordance with the rotation of the second pivoting plate;

A first position connected to the other end of the second lever and having a contact at one end, the first position contacting the normally closed contact terminal when the miniature circuit breaker is in an on position or an off position; and rotation of the pivot shaft during a trip operation. A movable contact rotatable to a second position contacting the output terminal of the alarm signal by the rotation of the second pivoting plate according to the driving;

A conductive connector connected to the movable contactor and rotatable in the same direction with the movable contactor, the conductive connector contacting the input terminal when the movable contactor is in the second position;

An alarm driving spring having one end fixedly supported in the enclosure and the other end connected to the second pivoting plate to impart an elastic force to the second pivoting plate to rotate to the second position; And

And a latch rotatable to a position for restraining the second pivoting plate in the first position and to a position for releasing the second pivoting plate by a pushing force of the first lever during a trip operation of the small circuit breaker. It can be achieved by providing a trip alarm device of a small circuit breaker according to the present invention.

The tripping alarm device of the small circuit breaker according to the present invention includes a rotating shaft rotating the first rotating plate and the second rotating plate in one direction by rotating in a predetermined direction during a trip operation of the small circuit breaker; As the configuration includes a latch for restraining or releasing the rotating plate and an alarm driving spring for applying an elastic force to the second rotating plate to rotate to a second position in contact with the alarm output terminal, the driving force for the trip alarm is operated as in the prior art. It is a configuration that receives directly from the alarm drive spring according to the release of the latch according to the rotation of a separate pivot shaft without receiving it through the handle and the complex power transmission mechanism. Therefore, the configuration for the trip alarm is simple and the reliability of the trip alarm drive operation can be guaranteed. It can be effective.

In the trip alarm device of a miniature circuit breaker according to the present invention, the latch has a hook portion that is movable to a position for restraining the second pivot plate or a position for releasing the second pivot plate. Since the second pivoting plate has a protruding restraining protrusion that is hooked and stopped by the hook portion of the latch, restraint is made as the hook portion is caught by the restraining protrusion, and the restraint release is performed as the hook portion is separated from the restraining protrusion. Since it is made, there is an effect that can perform the operation of restraint and liberation by a simple structure.

In the trip alarm device of the small circuit breaker according to the present invention, one end is fixedly supported on the enclosure, the other end is connected to the movable contact, and the movable contact is output when the movable contact is in the second position. An elastic force is applied to the movable contactor as a contact pressure to maintain contact with the terminal, and the movable contactor contacts the normally closed contact terminal when the movable contactor rotates to a first position beyond a dead point. The contact spring is configured to further include a contact spring that imparts an elastic force to the movable contact to accelerate the rotation more quickly. Therefore, the contact contact is energized by a leaf spring to make contact pressure moveable. In contrast to the prior art obtained by its own elastic force, even if a large current is energized Since the elasticity of the trigger is not impaired and the contact pressure of the movable contactor which contacts the output terminal of the alarm signal or the normally closed contact terminal is not lowered, a reliable trip alarm operation can be obtained.

The tripping alarm device of the miniature circuit breaker according to the present invention includes an auxiliary handle providing a user with a means for an alarm test on the miniature circuit breaker, and a latch release of the second rotating plate when the auxiliary handle is operated to the alarm test position. Since it further includes a third lever for transmitting the operating force of the auxiliary handle to the latch to rotate to the position, it is possible to obtain the effect that the user can test the trip alarm device by operating.

In addition, the trip alarm device of the miniature circuit breaker according to the present invention, since the rotation axis of the auxiliary handle 23 has a configuration independent of the rotation axis of the operation handle 22, the alarm signal device without interrupting the power supply The effect of testing the normality of can be obtained.

1 is a longitudinal cross-sectional view showing when a trip alarm device of a small circuit breaker according to a preferred embodiment of the present invention is in an off state,
Figure 2 is a longitudinal cross-sectional view showing the operation state when the trip alarm device of the miniature circuit breaker according to a preferred embodiment of the present invention when the operation handle is in the on position,
3 is a view illustrating an operation state of an operation handle, a first lever, a first rotation plate, a second rotation plate, and a latch when the operation handle is in an off position in the trip alarm device of the miniature circuit breaker according to the preferred embodiment of the present invention. It is a bell section,
4 is a longitudinal cross-sectional view illustrating a state in which a trip alarm device of a small circuit breaker according to a preferred embodiment of the present invention is in a trip operation.

The object of the present invention and the configuration and effect of the present invention to achieve the same will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying Figures 1 to 4.

As shown, the trip alarm device of a small circuit breaker according to a preferred embodiment of the present invention is the enclosure 21, the input terminal 31 of the alarm signal, the output terminal 32 of the alarm signal, the normally closed contact terminal 33 ), The operation handle 22, the first lever 27, the first rotating plate 26, the second rotating plate 24, the rotating shaft 26a, the second lever 29, the movable contactor 30, A conductive connector 30b, an alarm drive spring 35 and a latch 25.

The enclosure 21 is formed of an electrically insulating material as a means for receiving the components of the trip alarm device.

The input terminal 31 is fixedly installed at the upper part of the enclosure 21, in particular, one side of the enclosure 21, and provides a path for receiving an alarm signal from the outside. Here, the alarm signal may be configured as a power supply voltage signal from an external power supply, for example. The input terminal 31 is thus composed of a conductive material for receiving electrical signals from the outside and has a conductive end that is exposed to the outside and the other end extended to the movable contactor 30 to contact the movable contactor 30. It may be composed of a conductive piece. The input terminal 31 also has a connection screw and a connection screw hole for connection of a signal line to transmit an alarm signal from an external alarm signal source.

The output terminal 32 is a means for providing a path for outputting an alarm signal to the enclosure 21, in particular in the embodiment below the other side of the enclosure 21. The output terminal 32 is thus composed of a conductive material for outputting an electrical signal, for example, a power supply voltage signal to the outside, and is formed to extend to the movable contactor 30 side so as to be in contact with the movable contactor 30 side. It may be composed of a conductive piece having the other end. The output terminal 32 also has a connection screw and a connection screw hole for connection of a signal line to transmit an alarm signal to an external, for example, monitoring panel or monitoring station, which is connected to a small circuit breaker (hereinafter, abbreviated to circuit breaker) according to the present invention. At the station or station, the alarm signal can be used to light the alarm lamp or to drive the alarm buzzer.

The normally closed contact terminal 33 is a terminal fixedly installed at the upper part of the enclosure 21, in particular, the other side of the enclosure 21, and is a terminal irrelevant to an alarm signal indicating that the circuit breaker has tripped. The normally closed contact terminal 33 is used as a load-side output terminal of a circuit breaker according to the present invention, or a signal indicating that the circuit breaker is operating normally to the display means built in the circuit breaker or to an external monitor or monitoring station. Can be used as an output terminal.

The operation handle 22 is rotatably supported by the enclosure 21 and provides the user with manual operation means of the miniature circuit breaker.

The first lever 27 has one end connected to the operation handle 22 and is a means for moving forward or backward in the horizontal direction in accordance with the rotation of the operation handle 22. The first lever 27 may be composed of a metal rod having a predetermined diameter and generally in the shape of an alphabet "V" in accordance with one embodiment. According to a preferred embodiment, the first lever 27 is bent at right angles from the "V" shaped metal rod so that one end can be inserted into the connecting groove provided in the operation handle 22, and the other end is It is bent at a right angle from the metal bar, which is also "V" shaped, so that it can be inserted into the connecting groove provided in the one-turn plate 24.

The first pivot plate 26 is connected to the other end of the first lever 27 as best seen in FIG. 3, and is generally letter “L” shaped to be rotatable in accordance with the forward or backward movement of the first lever 27. It is a top edition. As shown in FIG. 3, the first pivot plate 26 has the connection groove having one side (right side in FIG. 3) open on the top thereof so that the other end of the first lever 27 can be connected and detached. Have The first pivot plate 26 has a spring support protrusion (unsigned) on which one end of the return spring, not shown, is supported at the lower right end in FIG. 3, and the return spring is predetermined first pivot plate 26. An elastic force is applied to the first rotating plate 26 to rotate to the initial position of.

As can refer to FIG. 3, the 2nd rotation board 24 is a substantially "y" shaped plate, and is connected coaxially to the 1st rotation board 26 by the rotation axis 26a. do. The second rotating plate 24 is rotatable in the same direction as the first rotating plate 26 by the driving of the rotating shaft 26a. The second pivotal plate 24 is the second when the circuit breaker is in the ON position (also referred to as the closed position) or when the user is in the OFF position (also known as the blocking position) by manual operation of the manipulation handle of the user. It has a 1st position where the rotation board 24 is located, and a 2nd position located when a circuit breaker trips. As shown in FIG. 1, the second pivoting plate 24 includes a spring support protrusion 24b for supporting the other end of the alarm drive spring 35 and a latch as shown in FIG. 3. And a catching protrusion 24a which is caught and stopped by the hook portion 25a of 25. According to a preferred embodiment, the locking protrusion 24a is composed of a semicircular protrusion having a flat portion and a remaining curved portion caught by the hook portion 25a of the latch 25.

The pivot shaft 26a axially supports the first pivot plate 26 and the second pivot plate 24, and rotates in a predetermined direction in the trip operation of the small circuit breaker to rotate the first pivot plate 26 and the second pivot plate 26. It is an axis which rotationally drives the rotating plate 24 to the said one direction. In order to provide such a rotational driving force, the rotation shaft 26a may be connected with a switching mechanism not shown in the circuit breaker art. The opening and closing mechanism is, as is well known, a trip spring providing a trip driving force, an upper link and a lower link transmitting a driving force of the trip spring, a shaft connected to the lower link and rotatable to a trip position.

1, 2 and 4, the second lever 29 has one end connected to the lower end of the second pivoting plate 24, and moves up and down in accordance with the rotation of the second pivoting plate 24. It is possible. In other words, the second lever 29 is lowered when the second pivoting plate 24 rotates counterclockwise, and the second lever 29 is raised when the second pivoting plate 24 rotates clockwise. do. The other end of the second lever 29 is connected to the movable contactor 30.

The movable contact 30 is connected to the other end of the second lever 29. The movable contact 30 has a contact at one end (front end, left end in FIG. 1), and is formed of an electrically conductive material. The movable contactor 30 has a first position in contact with the normally closed contact terminal 33 when the circuit breaker is in an on position or an off position by manual operation of the user's operation handle 22, and the rotational shaft during the trip operation. It is a means which can be rotated to the second position which contacts the output terminal 32 of the said alarm signal by the rotation of the 2nd rotation board 24 by the rotation drive of 26a. The movable contact 30 is rotatable by supporting the rear end (that is, the right end in FIG. 1) by the contactor rotation shaft 30a fixed to the enclosure 21.

The conductive connector 30b is a means connected to the movable contactor 30 and rotatable with the movable contactor 30 in the same direction. The conductive connector 30b may be made of a conductive piece such as copper or iron. Can be. The conductive connector 30b may be integrally formed with the movable contactor 30 and may be connected to the movable contactor 30 by a connecting means such as a rivet or by welding according to another embodiment. The conductive connector 30b is in contact with the input terminal 31 when the movable contactor 30 is in the second position, and is disconnected from the input terminal 31 when the movable contactor 30 is in the first position.

The alarm drive spring 35 has one end fixedly supported by the enclosure 21, and the other end thereof is connected to the second pivoting plate 24 so as to rotate to the second pivoting plate 24 in the second position. To impose. For the support of the alarm drive spring 35, the enclosure 21 supports an unsigned support protrusion that supports the left end of the alarm drive spring 35, as may refer to FIGS. 1, 2 or 4. Protruded potion, the second pivoting plate 24 includes a spring support protrusion (24b) that protrudes to hook and support one end of the alarm drive spring (35).

The latch 25 releases the second rotating plate 24 by the position of restraining the second rotating plate 24 at the first position and the pushing force of the first lever 27 during the trip operation of the circuit breaker. It is a means to rotate to position. The latch 25 has a hook portion 25a that can be rotated to a position for restraining the second pivoting plate 24 or to a position for releasing the second pivoting plate 24. For rotation of the latch 25, the hook portion 25a is provided with a bearing through hole for bearing a support shaft (not shown) fixed to the enclosure 21 at the rear end thereof. The latch 25 has a lever connection portion (unsigned) which is formed to extend from an upper surface of the rear end of the hook portion 25a and to which a third lever 28 to be described later is connected, and the lever connection portion has a third lever 28. Has a lever connection groove (unsigned) that allows the bent end of the to be inserted. As a means corresponding to the hook portion 25a of the latch 25, as can be seen in FIG. 3, the second pivot plate 24 is hooked to the hook portion 25a of the latch 25 to stop. It is provided with a protruding locking protrusion (24a).

The trip alarm device of the miniature circuit breaker according to the preferred embodiment of the present invention further includes a contact spring 34. One end of the contact spring 34 is fixedly supported by the enclosure 21, and the other end thereof is connected to the movable contactor 30. According to a preferred embodiment, in order to support the contact spring 34, as can be seen in FIGS. 1, 2 and 4, the enclosure 21 is roughly in alphabetical form to support one end of the contact spring 34. A spring seat portion having a “U” shape is provided, and the movable contactor 30 has a spring support groove portion (not shown) at a lower rear end thereof. When the movable contactor 30 is in the second position, the contact spring 34 imparts an elastic force as the contact pressure to the movable contactor 30 such that the movable contactor 30 maintains contact with the output terminal 32. When the movable contactor 30 rotates to the first position beyond the dead point, the contact spring 34 is rotated more quickly to the position where the movable contactor 30 always contacts the closed contact terminal 33. An accelerating elastic force is applied to the movable contactor 30. The dead point above is a turning point at which the direction of the elastic force acting on the movable contactor 30 by the contact spring 34 is changed, and is a position on the rotational track of the movable contactor 30 between the second position and the first position.

The trip alarm device of the miniature circuit breaker according to the preferred embodiment of the present invention may further include an auxiliary handle 23 and a third lever 28 as means for testing the alarm operation.

The auxiliary handle 23 is supported by a rotational axis different from the rotational axis of the operation handle 22 and can be rotated independently of each other, and provides a user with an operation means for an alarm test on the circuit breaker.

The third lever 28 has one end connected to the auxiliary handle 23 and the other end connected to the latch 25. The third lever 28 may be composed of a metal rod having a predetermined diameter and generally in the shape of the letter “V” in accordance with the preferred embodiment. According to a preferred embodiment, the third lever 28 is bent at a right angle from the "V" shaped metal rod so that one end can be inserted into the connecting groove provided in the auxiliary handle 23, and the other end is latched. It is bent at a right angle from the metal bar, which is also "V" shaped, so that it can be inserted into the connection groove provided in 25. As shown in FIG. When the user operates the auxiliary handle 23 to the alarm test position (when rotated counterclockwise in FIGS. 1 to 4), the latch 25 rotates to a position where the second pivot plate 24 is released. In order to do this, the third lever 28 transmits the operating force of the auxiliary handle 23 to the latch 25. In other words, when the user manipulates the auxiliary handle 23 to the alarm test position, as shown in FIG. 3, the hook portion 25a of the latch 24 rotates clockwise along with the latch 24. While releasing, the locking protrusion 24a of the second pivoting plate 24 is released.

On the other hand, the operation of the trip alarm device of the small circuit breaker according to the preferred embodiment of the present invention configured as described above will be described.

The operation includes an operation when the user operates the operation handle 22 to the on position, an operation when the user operates the operation handle 22 to the off position, and a circuit breaker is connected. An operation when an accident current such as an overcurrent or a short circuit current occurs on the power circuit to operate the circuit breaker in the trip position and the test operation of the trip alarm device of the present invention will be described, respectively.

First, the operation when the user operates the operation handle 22 to the on position will be described.

When the user rotates the operation handle 22 clockwise from the position shown in Fig. 1 to the on position shown in Fig. 2, the first lever 27 having one end connected to the operation handle 22 is rotated. The retraction moves (moves to the left in the drawing) in the horizontal direction. Therefore, the 1st rotating plate 26 whose upper part is connected to the other end of the 1st lever 27 rotates counterclockwise about the rotating shaft 26a. The rotating shaft 26a also rotates counterclockwise, and the second rotating plate 24 coaxially connected with the first rotating plate 26 on the rotating shaft 26a also rotates counterclockwise. The second lever 29 is raised by the counterclockwise rotation of the second pivoting plate 24, so that the movable contact 30 connected to the lower end of the second lever 29 is always as shown in FIG. It rotates to the 1st position (clockwise direction in drawing) which contacts the closure contact terminal 33. As shown in FIG. At this time, as shown in FIG. 2, as the conductive connector 30b is separated from the input terminal 31, the transmission of the alarm signal is blocked. This completes the operation when the user operates the operation handle 22 to the on position. At this time, the alarm drive spring 35 is tensioned by a predetermined length and maintained in a state in which the elastic energy is charged.

Secondly, the operation when the user operates the operation handle 22 to the off position will be described.

When the user rotates the operation handle 22 counterclockwise from the on position shown in FIG. 2 or the trip position shown in FIG. 4 to the off position shown in FIG. 1, the operation handle 22 is moved to the operation handle 22. The first lever 27 to which the end is connected moves forward (moves to the right in the drawing) by a predetermined distance in the horizontal direction. Therefore, the 1st rotating plate 26 whose upper part is connected to the other end of the 1st lever 27 rotates by the predetermined angle clockwise centering on the rotating shaft 26a. The rotating shaft 26a also rotates by a predetermined angle clockwise, and the second rotating plate 24 connected coaxially with the first rotating plate 26 on the rotating shaft 26a also has a predetermined angle clockwise. Rotate as much as you can. Accordingly, as shown in FIG. 3, the locking protrusion 24a of the second pivoting plate 24 is stopped by the hook portion 25a of the latch 25, thereby stopping the second pivoting plate 24. Is constrained in the first position, and thus further rotation in the clockwise direction of the second pivot plate 24 and the first pivot plate 26 is stopped, and thus the movable contactor is caused by the elastic contact force of the contact spring 34. The contact of 30 is kept in contact with the normally closed contact terminal 33. At this time, the alarm drive spring 35 is stretched by a predetermined length to accumulate elastic energy.

Third, an operation when an accident current such as overcurrent or short circuit current occurs on the power circuit to which the circuit breaker is connected and the circuit breaker operates to the trip position will be described.

When an accident current such as over current or short circuit current occurs on the power circuit to which the circuit breaker is connected, the switching mechanism automatically cuts off the circuit by triggering according to the fault current detection of a trip mechanism not shown. Perform the trip operation. At this time, the rotating shaft 26a connected to the opening / closing mechanism rotates in a predetermined direction, that is, counterclockwise in the drawing to move the first rotating plate 26 and the second rotating plate 24 in the one direction (counterclockwise direction). Drive rotation with). At this time, the operation handle 22 is rotated by a predetermined angle counterclockwise as shown in FIG. 4 in a state where the predetermined angle is rotated clockwise when in the on position as shown in FIG. 2. Accordingly, the other end of the first lever 27 is separated from the connecting groove portion in which one side (the right side in FIG. 3) is opened at the top of the first pivot plate 26, and the other end of the first lever 27 is latched. Push 25 to release the second pivoting plate 24. Then, while the alarm drive spring 35 contracts from the tensioned state, the elastic energy is allowed to rest and the second pivoting plate 24 is rotated counterclockwise. As a result, the second lever 29 is lowered and thus the movable contactor 30 connected to the lower end of the second lever 29 is rotated counterclockwise to be positioned at the second position in contact with the output terminal 32. At this time, the conductive connector 30b is brought into contact with the input terminal 31 as shown in FIG. 4, so that an alarm signal from the input terminal 31 is movable contact 30 and output terminal 32. ) And a signal line connected to the output terminal 32 to an external monitoring station or monitoring station, and the alarm signal can be used to light an alarm lamp or drive an alarm buzzer.

Fourth, the test operation of the trip alarm device of the present invention will be described.

According to a preferred feature of the present invention, the trip alarm device of the miniature circuit breaker according to the present invention includes a device capable of testing whether it operates normally, and describes a test operation using the device.

With the latch 25 restraining the second pivoting plate 24, if the user grips the auxiliary handle 23 and operates the auxiliary handle 23 counterclockwise for the alarm test, this operation force is reduced. It is transmitted to the latch 25 via the 3 lever 28, and the latch 25 rotates to the position which releases the 2nd rotation board 24. In other words, when the user manipulates the auxiliary handle 23 to the alarm test position, as shown in FIG. 3, the hook portion 25a of the latch 24 rotates clockwise along with the latch 24. While releasing, the locking protrusion 24a of the second pivoting plate 24 is released. Accordingly, the second driving plate 24 is rotated counterclockwise by precipitating elastic energy while contracting from the tensioned state of the alarm drive spring 35. As a result, the second lever 29 is lowered and thus the movable contactor 30 connected to the lower end of the second lever 29 is rotated counterclockwise to be positioned at the second position in contact with the output terminal 32. At this time, the conductive connector 30b is brought into contact with the input terminal 31 as shown in FIG. 4, so that an alarm signal from the input terminal 31 is movable contact 30 and output terminal 32. ) And a signal line connected to the output terminal 32 can be transmitted to an external monitoring station or monitoring station. When the auxiliary handle 23 is operated in the alarm test position in this manner, the counterclockwise rotation of the second pivot plate 24 and the movable contactor 30 are released by the release of the latch 25 and the drive of the alarm drive spring 35. When the rotation to the second position and output of the alarm signal are performed, the user can confirm that the alarm signal device is in a normal operation state.

In addition, according to a preferred feature of the present invention, since the rotational axis of the auxiliary handle 23 has a configuration independent from the rotational axis of the operation handle 22, it is possible to test whether the alarm signal device is normal without shutting off the power supply. The effect can be obtained.

21: enclosure 21a: spring support protrusion
22: operation handle 23: auxiliary handle
24: second rotation plate 24a: hook stone
24b: spring support stone
25: latch 25a: hook portion
26: first rotating plate 26a: rotating shaft
26b: spring support protrusion 27: first lever
28: third lever 29: second lever
30: movable contactor 30a: contactor rotation axis
30b: Challenge Connector 31: Input Terminal
32: Output terminal 33: Normally closed contact terminal
34: contact spring 35: alarm drive spring

Claims (4)

In the trip alarm device of a small circuit breaker,
An enclosure formed of an electrical insulation material;
An input terminal of an alarm signal fixed to the enclosure;
An output terminal of the alarm signal fixed to the enclosure;
A normally closed contact terminal irrelevant to an alarm signal fixed to the enclosure;
An operation handle rotatably supported by the enclosure and providing a user with manual operation means of the miniature circuit breaker;
A first lever having an end connected to the operation handle and movable forward or backward in a horizontal direction according to the rotation of the operation handle;
A first pivot plate connected to the other end of the first lever and rotatable in accordance with the forward or backward movement of the first lever;
It is connected coaxially to the first pivot plate, and is rotatable in the same direction as the first pivot plate, and when the small circuit breaker is in an ON position or is turned off by manual operation of the user's operation handle ( A second rotating plate having a first position positioned at an OFF) position and a second position positioned when the small circuit breaker trips;
The first rotating plate and the second rotating plate is axially supported, and rotates in the one direction by rotating the first rotating plate and the second rotating plate in the one direction during a trip operation of the small circuit breaker. Rotating shaft;
A second lever having one end connected to the lower end of the second pivoting plate, the second lever being movable up and down in accordance with the rotation of the second pivoting plate;
A first position connected to the other end of the second lever and having a contact at one end, the first position contacting the normally closed contact terminal when the miniature circuit breaker is in an on position or an off position; and rotation of the pivot shaft during a trip operation. A movable contact rotatable to a second position contacting the output terminal of the alarm signal by the rotation of the second pivoting plate according to the driving;
A conductive connector connected to the movable contactor and rotatable in the same direction with the movable contactor, the conductive connector contacting the input terminal when the movable contactor is in the second position;
An alarm driving spring having one end fixedly supported in the enclosure and the other end connected to the second pivoting plate to impart an elastic force to the second pivoting plate to rotate to the second position; And
And a latch rotatable to a position for restraining the second pivoting plate in the first position and to a position for releasing the second pivoting plate by a pushing force of the first lever during a trip operation of the small circuit breaker. Trip alarm device of small circuit breaker. The method of claim 1,
The latch has a hook portion rotatable in a position to restrain the second pivot plate or to release the second pivot plate,
And the second pivoting plate has a protruding locking protrusion which is stopped by being hooked to the hook portion of the latch. The method of claim 1,
One end is fixedly supported on the enclosure, the other end is connected to the movable contact, and when the movable contact is in the second position, the contact pressure is applied to the movable contact so that the movable contact maintains contact with the output terminal. A contact spring that imposes an elastic force and imparts an elastic force to the movable contact to rotate more quickly to a position in contact with the normally closed contact terminal when the movable contact is rotated to a first position beyond a dead point. Trip alarm device for a miniature circuit breaker further comprising a. The method of claim 1,
An auxiliary handle supported by a rotation axis different from the rotation axis of the operation handle, the auxiliary handle providing a user with operation means for an alarm test on the small circuit breaker; And
The auxiliary handle having one end connected to the auxiliary handle and the other end connected to the latch, wherein the latch rotates to a position where the latch releases the second pivoting plate when the user operates the auxiliary handle to an alarm test position. And a third lever for transmitting the operating force of the latch to the latch.

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