KR100618607B1 - Mechanism structure of circuit breaker - Google Patents

Abstract

The present invention relates to a mechanism structure of a circuit breaker, by implementing the isolation of the wiring part of the circuit breaker by the interlocking of the shaft guide and the cam surface and the specific cam surface of the lever included therein, thereby preventing the instability of the mechanism part. It is possible to implement a more stable mechanism function.

Mechanism structure of the circuit breaker according to the present invention for this purpose, the handle for indicating each state position; A lever having a cam surface for determining a rotation point of the handle and performing an isolation function; A reset pin for resetting the OFF position of the handle; A side plate and a side play trivet supporting the lever; A latch holder and a latch holder pin for supporting the side plate; A latch and a latch pin supported by the latch holder; A main spring connected between a main spring pin and a toggle pin, and an upper link and a lower link connected to the toggle pin for inputting and opening the handle; A shaft assembly in which a mover of the wiring breaker is in contact with a stator and a shaft rotate pin is connected; And a shaft guide inserted into the shaft rotate pin to rotate and having a cam surface. When the handle is rotated clockwise about the side play trivet, an OFF state or a reset ( RESET) state, and when it is rotated counterclockwise again in the off state or the reset state, the state becomes ON, and when an accident current flows in the ON state, the mover is fused with the stator and tripped. TRIP) state, when attempting to reset in the trip state, the cam surface of the lever is in contact with the cam surface of the shaft guide so as not to be switched to reset immediately, and then it is determined that there is an accident. In the case of operation, a reset or off operation may be performed by a sliding motion between the cam surface of the shaft guide and the cam surface of the lever. It is characterized in that the lock.

Description

MECHANISM STRUCTURE OF CIRCUIT BREAKER}

1 is a block diagram of a circuit breaker according to the prior art

2 is a configuration diagram showing a mechanism structure of a circuit breaker according to the related art

3A is a configuration diagram showing an off (reset) state of an opening and closing mechanism of a conventional circuit breaker.

3B is a configuration diagram showing an on state of an opening and closing mechanism of a conventional circuit breaker.

4 is a configuration diagram showing a tripping state of an opening and closing mechanism of a conventional circuit breaker;

5 is a configuration diagram showing a state in which a reset is attempted in a tripping state of an opening and closing mechanism of a conventional circuit breaker;

6 is a configuration diagram showing a mechanism structure of a circuit breaker according to the present invention;

Figure 7a is a block diagram showing an off (reset) state of the opening and closing mechanism portion of the wiring breaker according to the present invention.

7B is a configuration diagram showing an on state of the opening and closing mechanism of the circuit breaker according to the present invention;

8A is a configuration diagram showing a tripping state of an opening and closing mechanism of a circuit breaker according to the present invention;

8B is a configuration diagram showing a state in which a reset is attempted in a tripping state of an opening and closing mechanism of a circuit breaker according to the present invention;

<Explanation of symbols for the main parts of the drawings>

6-1: Handle 6-2: Lever

6-3: Reset Pin 6-4: Side Plate

6-5: Side Plate Rivet 6-6: Latch Holder Pin

6-7: Latch Holder 6-8: Latch

6-9: Latch Pin 6-10: Main Spring Pin

6-11: Main spring 6-12: Upper link

6-13: Lower Link 6-12: Upper Link

6-13: Lower Link 6-14: Toggle Pin

6-15: Movable 6-16a, 6-16b: Stator

6-17: Shaft Assembly

6-18a, 6-18b: Shaft-Rotate-Pin

6-19: Shaft Guide

6-20: Cam Face of Shaft Guide

6-21: Cam face of lever

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism structure of a circuit breaker. Particularly, for wiring which realizes an isolation function by interlocking a shaft and a lever when the circuit breaker is turned off. It relates to the mechanism structure of the breaker.

A circuit breaker is an electrical device that protects circuits and loads by automatically cutting off circuits in the event of an electrical overload or short circuit. In order to configure a circuit for flowing a constant current in such a circuit breaker, the input is completed by TRIP-OFF-ON and the energization state is maintained. At this time, in case of other fault current such as abnormal current, the breaker should cut off the fault current and the handle position should indicate TRIP status.If the breaker fails for other reasons such as fusion of the mover and stator, the handle position will be tripped. TRIP) status should be displayed. At this time, even if the user attempts to turn off the handle, the handle will return again to indicate the trip state or the corresponding position, so it is determined whether the breaker is abnormal. In addition, in the case of other normal operation such as breaking success, a mechanism having a structure capable of operating the handle OFF is required. The above function is included in the isolation function at the breaker, and the intention function of disconnecting the supply from the entire facility or the separation zone by disconnecting the facility or zone from all electrical energy sources for safety reasons is called isolation. It is called.

The circuit breaker is a terminal part that can make a large connection between the power supply side and the load side, and a mechanism part that opens and closes to make contact with the stator and the mover in the wiring breaker. It consists of a trip part that induces a trip to cut off the power. Therefore, the circuit breaker refers to a function of protecting a load and a circuit by blocking an abnormal current, that is, an overcurrent or instantaneous current and a short circuit current, between a power supply and a load.

On the other hand, in order to maintain this energized state, a structure for contacting the mover to the stator by the mechanism part is required, and this contact structure is typically implemented as a structure that is opened by artificial manual operation. In the case of artificial open manual operation, the position of the handle can be determined by the OFF and TRIP positions, and the contact state between the mover and the stator is usually called an ON state. The handle can be switched to the OFF position by manual operation in the normal ON state, and can be switched to the TRIP position by other external signals. The handle position at the trip means finding and aligning the trip position to the extent that a reaction force is applied to the external force, and not implementing any other external device. In the circuit breaker, the device in charge of the above main function is called the opening and closing mechanism, and generally, the opening and closing mechanism is composed of a handle, a lever, a main spring, an upper link, a lower link, a side plate, and other toggle pins. . The above components satisfy the following necessary conditions when implementing the isolation function and trip switching position.

Isolation: The toggle pin position is on the left side of the lever hinge point or equivalent.

Trip position: Toggle pin position is on the right side of the lever hinge point or equivalent

In general, the configuration of the circuit breaker includes a cover 1 and a case 2 for accommodating a component as shown in FIG. 1, and an opening / closing mechanism for mechanically turning on and off a converter. (3), a trip part 4 for detecting abnormal current and fault current, and a extinguishing part 5 for extinguishing arc ARC generated between the contacts at the time of interruption.

Among them, the TRIP-OFF-ON structure of the mechanism part includes a handle 2-1 for indicating each position and a lever for determining a rotation point, as shown in FIG. 2), a reset pin (2-3) for resetting the OFF position, the side plate (2-4) and the side plate rivet pin (2-5) for supporting the lever (2-2), the side Latch holder pins (2-6) supporting the plates (2-4), latch holders (2-7), latches (2-8) and latch pins (2-9) supported by the latch holder, the opening and closing May spring pin (2-10), main spring (2-11), upper link (2-12), lower link (2-13), the upper link (2-12) and the lower link (2-13) Toggle pins (2-14), and the mover (2-15) are composed of a shaft assembly (2-17) for contacting the stators (2-16a) (2-16b). .

Conventional wiring breaker opening and closing mechanism operation is as follows. FIG. 2 illustrates a trip state, and when the handle 2-1 rotates clockwise around the side plate rivet pin 2-5, which is a lever hinge point, as shown in FIG. 3A. It becomes an OFF state (or a reset state). When the handle 2-1 is rotated counterclockwise again in the above state, the handle 2-1 is turned on as shown in FIG. 3B.

When the mover (2-15) is fused with the stator (1-16a) (1-16b) by the fault current or other action in the ON state and the trip (TRIP) state, Figure 4 In this state, if a reset is attempted as shown in FIG. 5, the reset is not performed and a state as shown in FIG. 4 must be switched. On the other hand, in the normal state without an accident, the handle of OFF (or RESET)-ON should operate normally.

In order to implement isolation as shown in FIG. 5, in the case of a normal state, the OFF-ON should be normally operated. When the stators 2-16a and 2-16b are fused, a mechanism having a structure that needs to be switched as shown in FIG. 4 is required. In the case of the fusion of the mover (2-15) and the stator (2-16a) (2-16b) due to an accident occurs, the toggle pin position is left of the lever hinge point to return to as shown in FIG. It should be in a state equivalent to this. On the other hand, in the trip (TRIP) state, since the toggle pin position should be located on the left side than the lever hinge point, the position points opposite to each other are required.

This opposition raises the need to adjust the position of each node and the ratio of the upper and lower links to find the position point, and the points of the opposite position pose structural problems that are the cause of the unstable mechanism state. .

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to determine the isolation of the shaft guide and the cam surface and the lever included in the isolation of the mechanism of the circuit breaker. By implementing by the cam surface interlock, to provide a mechanism structure of the circuit breaker to eliminate the unstable problem contained in the mechanism portion and to enable more stable mechanism function implementation.

Mechanism structure of the circuit breaker according to the present invention for achieving the above object is a handle for indicating each state position; A lever having a cam surface for determining a rotation point of the handle and performing an isolation function; A reset pin for resetting the OFF position of the handle; A side plate and a side play trivet supporting the lever; A latch holder and a latch holder pin for supporting the side plate; A latch and a latch pin supported by the latch holder; A main spring connected between a main spring pin and a toggle pin, and an upper link and a lower link connected to the toggle pin for inputting and opening the handle; A shaft assembly in which a mover of the wiring breaker is in contact with a stator and a shaft rotate pin is connected; And a shaft guide inserted into the shaft rotate pin to rotate and having a cam surface. When the handle is rotated clockwise about the side play trivet, an OFF state or a reset ( RESET) state, and when it is rotated counterclockwise again in the off state or the reset state, the state becomes ON, and when an accident current flows in the ON state, the mover is fused with the stator and tripped. TRIP) state, when attempting to reset in the trip state, the cam surface of the lever is in contact with the cam surface of the shaft guide so as not to be switched to reset immediately, and then it is determined that there is an accident. In the case of operation, a reset or off operation may be performed by a sliding motion between the cam surface of the shaft guide and the cam surface of the lever. It is characterized in that the lock.

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Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

The structure of the circuit breaker of the present invention is a cover (Cover) 1 and a case (Case) (2) for accommodating parts, as shown in Figure 1, and a switch for mechanically turning the converter ON-OFF (ON-OFF) It consists of a bent part 3, a trip part 4 which detects the occurrence of an abnormal current and an accident current, and a extinguishing part 5 which extinguishes the arc ARC generated between the contacts at the time of interruption.

Among them, the TRIP-OFF-ON structure of the mechanism part includes a handle 6-1 for indicating each state position and a lever 6 for determining a rotation point, as shown in FIG. -2), the cam surface 6-21 included in the lever functioning as isolation, a reset pin 6-3 for resetting the OFF position, and the lever 6 -2) side plate 6-4 and side plate rivets 6-5, latch holder pins 6-6 supporting the side plate 6-4, latch holders 6-7 A latch 6-8 and a latch pin 6-9 supported by the latch holder 6-7, a main spring pin 6-10 for inputting and opening, a main spring 6-11, upper A link 6-12, a lower link 6-13, a toggle pin 6-14 connecting the upper link 6-12 and the lower link 6-13, and an actuator 6-15. ) Shaft assembly (6-17) and shaft-rotate-pin (6-18a) (6-18b) for contacting the stator (6-16a) (6-16b) Shovel in The shaft is configured to guide a rotational motion (Shaft Guide) (6-19) and with a cam surface (6-20) contained in them.

The circuit breaker opening and closing mechanism of the present invention is as follows. FIG. 6 illustrates a trip state, and when the handle 6-1 rotates clockwise around the side play trivet pin 6-5, which is a lever hinge point, as shown in FIG. 7A. It becomes an OFF state (or a reset state). In this state, when the handle 6-1 is rotated counterclockwise again, it is in an ON state as shown in FIG. 7B.

When the mover 6-15 is fused with the stators 6-16a and 6-16b by an accident current or other action in the ON state and then trips, the circuit 6T and FIG. In the same state, when the RESET is attempted as shown in FIG. 8B, the lever 6-2 is formed at the rounded corner of the cam surface 8-1 included in the shaft guide 6-19. Since the rounded corners of the included cam surface 8-2 come into contact with each other, the reset is impossible, and thus the state of the cam guide 8-2 is changed to the state of FIG. 7 by a sliding motion between the rounded corner of the cam surface 8-1 included in the cam surface 8-1 and the rounded corner of the cam surface 8-2 included in the lever 6-2. Or OFF} is a mechanism in which the operation is normally performed.

The present invention is not limited to the above-described embodiments, but can be variously modified and changed by those skilled in the art, which should be regarded as included in the spirit and scope of the present invention as defined in the appended claims. something to do.

As described above, according to the mechanism structure of the circuit breaker according to the present invention, it solves the instability problem caused by the implementation of the position points of the mechanism part itself, and trips (TRIP) -OFF (OFF) of each position of the handle It can increase the precision in the) -on conversion and increase the overall stability of the mechanism and performance of other functions.

Claims (1)

In the mechanism structure of the circuit breaker, A handle indicating each state position; A lever having a cam surface for determining a rotation point of the handle and performing an isolation function; A reset pin for resetting the OFF position of the handle; A side plate and a side play trivet supporting the lever; A latch holder and a latch holder pin for supporting the side plate; A latch and a latch pin supported by the latch holder; A main spring connected between a main spring pin and a toggle pin, and an upper link and a lower link connected to the toggle pin for inputting and opening the handle; A shaft assembly in which a mover of the wiring breaker is in contact with a stator and a shaft rotate pin is connected; And And a shaft guide inserted into the shaft rotate pin to rotate and having a cam surface. When the handle is rotated in a clockwise direction about the side play trivet, it becomes an OFF state or a reset state, When it is rotated counterclockwise again in the off state or the reset state, the state becomes ON. When the fault current flows in the ON state, the mover is fused with the stator and tripped. When attempting to reset in the trip state, the cam surface of the lever contacts the cam surface of the shaft guide so that the cam surface of the lever cannot be directly switched to reset, and after determining whether there is an abnormality of the accident, the shaft guide in case of normal operation. A mechanism structure of a circuit breaker for carrying out a reset or off operation by a sliding motion between a cam surface of the cam surface and a cam surface of the lever.

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