JPH04306527A - Forced trip apparatus for inserting type circuit breaker with electrical operation device - Google Patents

Abstract

PURPOSE:To prevent a breaker device from being demounted in ON state of a circuit breaker by tripping forcibly the circuit breaker when an electrical operation device installed on the surface of the circuit breaker is demounted. CONSTITUTION:On the outer side of an installation surface 1b on which the electrical operation device 3 of a circuit breaker 1 is installed, a rotary axis 12 parallel to the installation surface 1b is provided, a lever 10, having an arm 10a with its length equal to the distance between the rotational axis 12 to the trip button 1c of the circuit breaker 1, and a projection 10b for pressing the trip button is supported on the rotary axis 12 as being rotatable freely, and the level 10 is energized in the direction for pressing the trip button 1c by means of a forsion spring 11.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a device for preventing a circuit breaker from being removed from a disconnection device while it is in the ON state, and in particular, a device for preventing a circuit breaker from being removed from a disconnection device while it is in the ON state, and in particular, a device for preventing a circuit breaker from being removed from a disconnection device while it is in the ON state. This invention relates to a forced tripping device for an insertion type circuit breaker with an electric operating device that causes the circuit breaker to trip automatically.

0002

2. Description of the Related Art The structure of a conventional insertion type circuit breaker with an electric operating device will be explained with reference to FIGS. 7, 8, 9 and 10. FIG. 7 is a perspective view showing the external configuration of an insertion type circuit breaker with an electric operating device attached to its surface, FIG. 8 is a perspective view showing a state in which the electrical operating device is removed, and FIG.
and FIG. 10 are perspective views showing external configurations of a circuit breaker and a disconnecting device, respectively.

As shown in FIG. 10, the disconnecting device 2 is provided with a terminal 2a for connection to a main circuit terminal (not shown as it is well known) protruding from the back side of the circuit breaker 1. Further, as shown in FIG. 9, a handle 1a for opening and closing the circuit breaker and a trip button 1c for tripping the circuit breaker 1 are provided on the surface of the circuit breaker 1. In FIG. 7, an electric operating device 3 for electrically opening and closing the circuit breaker 1 from a distance is fixed to the front surface 1b of the circuit breaker 1 with screws 4 via a mounting plate 5, a spacer 6, and an insulating plate 7. ing.

Next, a procedure for removing the circuit breaker 1 to which the conventional electric operating device 3 is attached from the disconnecting device 2 will be explained.

When the electrical operating device 3 is removed while the circuit breaker 1 is in the ON state as shown in FIG. 7, the state shown in FIG. 8 is reached. Here, the circuit breaker 1 remains on. Further, when the circuit breaker 1 is removed, the terminals 2a are exposed on the surface of the disconnecting device 2, as shown in FIG.

[0006]

As described above, in the conventional insertion type circuit breaker with an electric operating device, since the electric operating device 3 can be removed while the circuit breaker 1 remains on, Furthermore, when removing the circuit breaker 1 from the disconnection device 2, there is a problem in that the operator may touch live parts such as the main circuit terminals of the circuit breaker 1 and receive an electric shock.

The present invention has been made to solve the above-mentioned problems, and provides a forced trip device for an insertion-type circuit breaker with an electric operation device that turns off the circuit breaker immediately when the electric operation device is removed. is intended to provide.

[0008]

[Means for Solving the Problems] A forced trip device for an insertion type circuit breaker with an electric operating device according to the present invention is provided on the outside of the electrical operating device mounting surface of the circuit breaker, and is parallel to the electrical operating device mounting surface. a lever rotatably supported by the rotating shaft, having an arm equal to the distance from the rotating shaft to the trip button of the circuit breaker, and a protrusion for pushing the trip button; and biasing means for biasing in the direction of insertion.

[0009]

Operation: When the electric operating device is attached to the circuit breaker, the lever is rotated against the biasing force of a biasing means, such as a torsion spring, and is in contact with the side surface of the electrical operating device. In this state, the circuit breaker trip button is covered by the electric operating device, so it cannot be pushed by the lever. When the electrical operating device is removed from the circuit breaker, the lever is immediately rotated by the biasing force of the biasing means to push the trip button of the circuit breaker. The circuit breaker is tripped by pressing the trip button.

0010

[Embodiment] A forced trip device for an insertion type circuit breaker with an electric operating device according to the present invention will be explained using FIGS. 1, 2, 3, 4, 5 and 6 showing a preferred embodiment thereof. I will explain. Figure 1 is a perspective view showing the state in which the electrical operating device is attached to a circuit breaker with a forced trip device, FIG. 2 is a bottom view of the same, and FIG. 3 is the state in which the electrical operating device is removed from the circuit breaker with a forced trip device. A bottom view showing the same, FIG. 4 is a perspective view of the same,
FIG. 5 is a perspective view showing the structure of a circuit breaker with a forced trip device, and FIG. 6 is a perspective view showing the structure of the forced trip device.

In FIG. 1, a circuit breaker 1 is a disconnecting device 2.
Furthermore, on the surface of the circuit breaker 1 there is an electric operating device 3 for electrically opening and closing the circuit breaker 1 from a distance, and when the electric operating device 3 is removed, the circuit breaker 1
Forced trip device 20 for forcibly tripping
is installed. Similar to the conventional example, the disconnecting device 2 is provided with a terminal 2a for connection to a main circuit terminal (not shown as it is well known) protruding from the back surface of the circuit breaker 1, as shown in FIG. . Similarly to the conventional example shown in FIG. 9, a handle 1a for opening/closing (on/off) the circuit breaker 1 and a trip button 1c for tripping the circuit breaker 1 are provided on the surface of the circuit breaker 1. The electric operating device 3 operates the handle 1 of the circuit breaker 1 using the suction action of the solenoid to open and close the circuit breaker 1 (
It is a device for turning on/off). The electrical operating device 3 generally consists of a main body 3a and a cover 3b.The main body 3a, which includes a solenoid and the like (not shown due to well-known reasons), is fixed to the front surface 1b of the circuit breaker 1 with screws 4, and the cover 3b
is fixed to the main body 3a with screws 3c.

In FIGS. 1 to 6, the forced trip device 2
0 denotes a frame 9 attached to the circuit breaker 1 and a rotation axis that is rotatably supported by the frame 9 and parallel to the front surface (hereinafter referred to as the mounting surface) 1b on which the electric operating device 3 of the circuit breaker 1 is attached. 12, a lever 10 that is rotatably supported on the rotating shaft 12 and has an arm 10a having a length equal to the distance from the rotating shaft 12 to the trip button 1c of the circuit breaker 1, and a projection 10b for pushing the trip button 1c; It has a torsion spring 11 for biasing the trip button 1c in the direction of pushing it.

As shown in FIG. 2, a forced trip device 20
is fixed to the circuit breaker 1 with a screw 15 via a spacer 6 and an insulating plate 7. The frame 9 has a substantially L-shaped cross section. The rotating shaft 12 is mounted on the mounting surface 1 of the circuit breaker 1 so as not to interfere with the electrical operation device 3 to the circuit breaker 1.
circuit breaker 1 of the frame 9 on the outside thereof, avoiding b.
It is provided in the part 9a facing the side part 1d of the. Specifically, the rotating shaft 12 is a stepped shaft having a flange at one end, and after being inserted into a hole in a bearing portion 9b formed by bending a portion 9a of the frame 9, the rotating shaft 12 is inserted into a hole at the other end as shown in FIG. The E-shaped retaining ring 13 is engaged with the end of the retaining ring 13 to prevent the retaining ring from coming off. The torsion spring 11 is provided outside the rotating shaft 12, and its two arms are engaged with the lever 10 and the frame 9, respectively.

The lever 10 has a substantially L-shape as shown in FIGS. 1 to 6. That is, since the rotating shaft 12 is provided in the portion 9a of the frame 9 facing the side 1d of the circuit breaker 1 so as not to interfere with the attachment of the electrical operating device 3 to the circuit breaker 1, This is to enable the projection 10b at the tip of the arm 10a to push the trip button 1c of the circuit breaker 1, as shown in FIGS. 4 and 5.

Forced trip device 2 for an insertion type circuit breaker with an electric operating device according to the present invention, configured as described above.
The procedure for removing the circuit breaker 1 to which the circuit breaker 0 is attached from the disconnecting device 2 will be explained.

A circuit breaker 1 as shown in FIGS. 1 and 2
Remove the electrical operating device 3 from the state where the electrical operating device 3 is attached. First, loosen the screw 3c and attach the cover 3b to the main body 3.
a, then loosen the screws 4 and remove the main body 3a from the circuit breaker 1. Lever 10 of forced trip device 20
is prevented from rotating by the electrical operating device 3 and is in contact with the side wall of the electrical operating device 3. However, when the electric operating device 3 is removed, the rotation due to the biasing force of the torsion spring 11 is no longer prevented, and it immediately rotates so as to push the trip button 1c of the circuit breaker 1. 3 and 4 show the state at this time.

When the trip button 1c is pressed, the circuit breaker 1 is tripped. Furthermore, the screw 8 is loosened to remove the circuit breaker 1 from the disconnection device 2. FIG. 5 shows the state at this time. Here, since the circuit breaker 1 has already been tripped, even if the operator's hand touches the main circuit contacts of the circuit breaker 1, he will not receive an electric shock.

[0018]

As described above, according to the present invention, the lever 10 is rotated by the biasing force of the torsion spring 11 almost simultaneously when the electric operating device 3 is removed, and the circuit breaker 1 is tripped. Even if the device 1 is removed from the disconnecting device 2, there are no live parts at the main circuit contacts or the like. Therefore, even if a worker's hand accidentally touches a main circuit contact or the like, he will not receive an electric shock, and the safety of the removal work of the circuit breaker 1 will be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a state in which an electric operating device is attached to a circuit breaker with a forced trip device.

FIG. 2 is a bottom view of the same.

FIG. 3 is a bottom view showing a state in which the electric operating device is removed from the circuit breaker with a forced trip device.

FIG. 4 is a perspective view of the same.

FIG. 5 is a perspective view showing the configuration of a circuit breaker with a forced trip device.

FIG. 6 is a perspective view showing the configuration of a forced trip device.

FIG. 7 is a perspective view showing the external configuration of an insertion type circuit breaker with an electric operating device attached to its surface.

FIG. 8 is a perspective view showing a state in which the electric operating device is removed.

FIG. 9 is a perspective view showing the external configuration of the circuit breaker.

FIG. 10 is a perspective view showing the external configuration of a disconnecting device.

[Explanation of symbols]

1 Circuit breaker 1a Handle 1b Electric operation device mounting surface 1c Trip button 2. Disconnecting device 3 Electrical operation device 10 Lever 11 Torsion spring 12 Rotation axis 20 Forced trip device

Claims (1)

[Claims] Claim 1: A rotating shaft provided outside the electrical operating device mounting surface of the circuit breaker and parallel to the electrical operating device mounting surface;
a lever rotatably supported by the rotating shaft, having an arm equal to the distance from the rotating shaft to the trip button of the circuit breaker, and a protrusion for pushing the trip button; and biasing the lever in a direction to push the trip button. A forced trip device for an insertion type circuit breaker with an electric operating device, comprising a biasing means for activating the device.