KR100978274B1 - Mold cased circuit breaker - Google Patents

Abstract

The present invention is to provide a wiring circuit breaker that can indicate whether the reset operation and the trip operation in the wiring circuit breaker normal operation, and can be artificially trip test, a latch capable of restraining or releasing the latch (LATCH) included in the opening and closing mechanism LATCH HOLDER; A reset position for restraining the latch holder and a trip mechanism triggered by a trip mechanism to release the restraint of the latch holder to enable a trip operation of the opening / closing mechanism, and may be rotated to an upper portion of the reset position and the trip position. A nail having a display unit corresponding to each of them; And an opening part provided at a position where the upper part of the nail can be viewed to expose and display the display part of the nail to the outside and to allow artificial access of the nail for a test, and a handle for manual operation of the opening and closing mechanism. And an auxiliary cover having a handle operating tool to allow movement of the vehicle.

Circuit breakers, nails, auxiliary covers, openings

Description

Circuit Breakers {MOLD CASED CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker, and more particularly, to a circuit breaker capable of displaying whether a reset operation and a trip operation are normally performed and which can be artificially tripped (TRIP).

Wiring breakers are typically one of the power devices used to open and close low voltage circuits of up to several hundred volts alternating current (VOLT) and protect circuits and load devices from large transient currents such as short circuit currents.

Such a circuit breaker includes a switch mechanism having a mechanism for opening and closing a circuit, a trip mechanism (TRIP MECHANISM) for triggering (TRGGER) the switch mechanism to operate in a circuit break position when an abnormal current on the circuit is detected. And a lower enclosure (LOWER CASE) incorporating the opening and closing mechanism, the trip mechanism and the opening and closing mechanism, and an upper cover (UPPER COVER) covering the lower enclosure. The wiring breaker also has a handle HANDLE that provides a means for manually manipulating the opening / closing mechanism into an ON or OFF position.

Normally, when the trip mechanism detects an abnormal current on the circuit and triggers the switch mechanism to operate in the circuit break position (aka trip position), the handle is located at an intermediate position between the on position and the off position. In order to operate the handle of the circuit breaker in the on position in order to normally energize the circuit after such an abnormal state of the circuit is solved, first, the operation to the reset position (that is, the off position) is required. The reset position means a state in which the switch mechanism is ready to trip again when the trigger mechanism is triggered so that the trip mechanism operates in the trip position. ) Is a state in which the trip spring (TRIP SPRING) is kept in a state in which elastic energy is kept in order to provide a trip driving force.

The circuit breaker according to the prior art does not have a means for visually confirming whether the operation to the reset position and the trip position of the switch mechanism is normally performed. Therefore, the circuit breaker is checked and a wiring breaker is replaced in the event of a failure. There was a problem that could not take any necessary action promptly.

In order to test whether the circuit breaker for a trip according to the prior art is tripping normally, a trip button and a mechanism for transmitting the operating force of the trip button are required. There was a problem.

Accordingly, the present invention solves the problems of the prior art, and an object of the present invention is to have a means for visually confirming whether the operation of the opening / closing mechanism to the reset position and the operation to the trip position are visually confirmed. It is to provide a circuit breaker.

Another object of the present invention is to provide a circuit breaker that can be directly and easily tested whether tripping normal operation.

The object of the present invention is an opening and closing mechanism having a mechanism part for opening and closing a circuit, a trip mechanism (TRIP MECHANISM) for triggering the opening and closing mechanism (TRGGER) to operate in a circuit break position when detecting an abnormal current on the circuit, In the circuit breaker having a lower enclosure that houses the opening and closing mechanism and the trip mechanism, and an upper cover (COVER) covering the lower enclosure,

A latch holder (LATCH HOLDER) capable of restraining or releasing a latch included in the opening / closing mechanism;

A reset position for restraining the latch holder and a trip position triggered by the trip mechanism to release the restraint of the latch holder to trip the opening / closing mechanism; A nail having a display portion corresponding to each of the positions NAIL; And

An opening part provided at a position where the upper part of the nail can be viewed to expose and display the display part of the nail to the outside and to allow artificial access to the nail for a test, and the handle for manual operation of the opening and closing mechanism It can be achieved by providing a circuit breaker according to the invention, characterized in that it comprises an auxiliary cover having a handle operating mechanism to allow movement.

The circuit breaker according to the present invention is rotatable to a reset position for restraining the latch holder and a trip position triggered by the trip mechanism to release the restraint of the latch holder to trip the opening / closing mechanism, and the reset position in the upper portion. A nail having a mark corresponding to each of the trip positions and a nail is provided at a position where the upper part of the nail can be seen so as to expose and display the mark of the nail to the outside and allow artificial access to the nail for a test. And an auxiliary cover having a handle operating tool for allowing movement of the handle for manual operation of the opening and closing mechanism, and according to the indication of the display portion of the nail through the opening of the auxiliary cover. It is possible to check the visibility of the trip position, and to operate the nail directly through the opening to trip the opening and closing mechanism. A testable effect can be obtained.

In the circuit breaker for wiring according to the present invention, since the display part of the nail is composed of a reset display part and a trip display part which display the corresponding position in a color body corresponding to each of the reset position and the trip position, the reset position and the trip position are easily made by the color body. The effect can be seen.

In the circuit breaker for wiring according to the present invention, since the display unit of the nail is composed of a reset display unit and a trip display unit which display the corresponding position by a character or symbol which is distinguished corresponding to each of the reset position and the trip position, the reset position by the character or symbol. There is an effect that can easily check the trip position.

In the circuit breaker according to the present invention, the display portion of the nail,

Since it is composed of a reset display unit and a trip display unit formed to have a step difference from each other so as to be distinguished corresponding to each of the reset position and the trip position, there is an effect that the reset position and the trip position can be easily checked by the step difference (height difference) of each other. .

The nail in the circuit breaker according to the invention,

A holder restraining portion extending to contact the latch holder to restrain or release the latch holder; And

Since the display unit extends upward toward the opening of the auxiliary cover and displays the reset position and the trip position on the upper surface, respectively, the reset position and the trip position can be visually confirmed by the nail without the need for a separate display device. This minimizes the additional configuration for display and prevents cost increases.

The object of the present invention and the constitution and effects 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 drawings.

Figure 1 is a perspective view showing the appearance of the assembly of the opening and closing mechanism and the tripping mechanism of the circuit breaker according to the present invention, Figure 2 is the operation state to the outside when the opening and closing mechanism in the reset circuit breaker according to the present invention to the outside Fig. 3 is an external perspective view of the circuit breaker showing the display, and Fig. 3 is an external perspective view of the circuit breaker showing the operation state when the open / close mechanism is in the trip state according to the present invention. Figure 5 is a partial longitudinal cross-sectional view showing a terminal terminating the upper part of the circuit breaker in order to show the operating state of the operation state display device of the opening and closing mechanism in the wiring breaker according to the present invention, the enlarged view of the main part, Figure 5 In the circuit breaker for wiring according to the present invention, the operation state display device of the switching mechanism is tripped. To show the indicating operation state shown by the upper end of the circuit breaker part longitudinal cross-sectional view and a hospital is an enlarged main portion.

1, the wiring breaker according to the present invention operates the opening and closing mechanism 9 having a mechanism part for opening and closing a circuit, and the opening and closing mechanism 9 in a circuit breaking position when an abnormal current on the circuit is detected. And a tripping mechanism (TRIP MECHANISM) 6 for triggering so that the wiring breaker 10 according to the present invention includes the opening and closing mechanism and the tripping mechanism. It is configured to include a lower enclosure (2), and an upper cover (COVER) (1) covering the lower enclosure (2). Here, the opening and closing mechanism 9 is, as is well known, the upper and lower links connected between the movable contactor (not shown), the shaft supporting the movable contactor, and the shaft and the handle (see reference numeral 4 described later). (LINK), a link pin for connecting the upper and lower links, a tripping spring (TRIP SPRING) installed between the handle and the link pin to provide an elastic driving force for tripping operation, And a latch (LATCH) and the like having a restrained position for maintaining the state and a released position for releasing the elastic energy for the trip operation. As well known, the trip mechanism may include, for example, an electromagnetic magnet (MAGNETIC COIL) electrically connected to the fixed contactor side for detecting abnormal current on a circuit, an armature that can be rotated by the magnetic force of the electromagnet, and a trip bar (TRIP). BAR) or the like, or may be thermally constituted by a bimetal (BIMETAL) and a heater (HEATER).

As the wiring breaker 10 according to the present invention can refer to FIGS. 1, 4, and 5, a latch capable of restraining or releasing a latch (not shown) included in the opening / closing mechanism 9. And a holder (LATCH HOLDER) 7. Here, the latch is biased so as to rotate in one direction (counterclockwise in the figure) by a trip spring not shown as a plate-like member rotatably supported by the side plate 8. The latch holder 7 is also a plate-like member rotatably supported on the side plate 8, in particular having a groove or opening in which one end of the latch can be inserted and restrained or released. Since the configuration of the latch, the trip spring and the latch holder are well known in the art, more detailed descriptions and drawings will be omitted.

As the circuit breaker according to the present invention is a characteristic component, as shown in FIGS. 1, 4, and 5, a nail having a display portion 3a corresponding to each of the reset position and the trip position is formed on the upper side thereof. NAIL) (3). The nail 3 is triggered by a reset mechanism for restraining the latch holder 7 and a tripping mechanism 6 to release the restraint of the latch holder 7 so as to trip the opening / closing mechanism 9. Can be rotated to

Preferably, the display portion 3a of the nail 3 is, in one embodiment, a reset display portion 3a-1 and a trip display portion 3a for displaying the corresponding positions in a color body corresponding to each of the reset position and the trip position. -2). For example, the reset display unit 3a-1 may be configured in red, and the trip display unit 3a-2 may be configured in green to distinguish and display the current position of the opening / closing mechanism 9 by color.

Preferably, the display portion 3a of the nail 3 is, as another embodiment, a reset display portion 3a-1 and a trip display portion for displaying the corresponding positions with letters or symbols which are distinguished corresponding to each of the reset position and the trip position. (3a-2). For example, the reset display unit 3a-1 may be displayed by the letters "RESET", "R" or "Reset" or by the symbol "Δ", and the trip display unit 3a-2 may be displayed by "TRIP", "T". Or a letter "의" or a symbol "●".

Preferably, the display portion 3a of the nail 3 is different from each other so that the display portions of the nail can be distinguished corresponding to each of the reset position and the trip position, as shown in FIGS. 1, 4, and 5. (That is, a height difference), and a reset display portion 3a-1 and a trip display portion 3a-2.

Preferably, the nail 3 has a holder restraint extending to contact the latch holder 7 to restrain or release the latch holder 7, as can be seen in FIGS. 1, 4 and 5. It comprises a part 3b).

As can be seen in FIG. 1, the tripping mechanism 6 is particularly rotatable by being caught by a hook portion (unsigned) of the trip bar of the tripping mechanism 6 or being released from the hook portion. A shooter member 6a. Thus, when the lower body portion 3c of the nail 3 is priced by the rotating shooter member 6a, the nail 3 rotates (clockwise rotation in FIGS. 1 and 5).

In addition, the circuit breaker according to the present invention includes, as a characteristic component, an auxiliary cover 5, as can be seen with reference to FIGS. The auxiliary cover 5 is provided at a position where the upper part of the nail 3 can be seen so as to expose and mark the display portion 3a of the nail 3 to the outside and to allow artificial access to the nail 3 for testing. The opening part 5a is provided. The auxiliary cover 5 also has a handle operating tool 5b that allows movement of the handle 4 for manual operation of the opening and closing mechanism. Here, the artificial approach to the nail 3 for the test is performed by inserting a simple hand tool such as, for example, a screw driver through the opening 5a to specifically test whether the normal trip operation is possible. For example, the tripping operation is artificially generated by pushing or pulling the upper surface of the upper surface of the display unit 3a.

4 and 5, the display portion 3a of the nail 3 extends upwardly toward the opening portion 5a of the auxiliary cover 5, and the reset position and the trip position on the upper surface. The nail 3 is supported by the lower body portion 3c and the side plate 8 at the lower portion of the display portion 3a, and the rotating shaft portion 3d which provides a rotation point of the nail 3. Has

Referring to Figures 2 to 5 the operation and effect of the circuit breaker according to the present invention configured as described above are as follows.

First, the trip position display operation of the nail 3 will be described.

When a large abnormal current such as a short circuit current on the circuit is energized, the trip mechanism 6 electrically connected to the fixed contactor thus triggers the switch mechanism 9 to trip. That is, as can refer to FIG. 1, as the hook member 6a of the trip bar releases the shooter member 6a of the trip bar of the trip mechanism 6, the shooter member 6a can refer to FIG. 5. While rotating in the direction, the lower body portion 3c of the nail 3 is hit, and the nail 3 rotates clockwise as can refer to FIGS. 1 and 5. Accordingly, as the trip display portion 3a-2 of the display portion 3a of the nail 3 is located below the opening portion 5a of the auxiliary cover 5, the wiring breaker, in particular, the opening / closing mechanism 9 according to the present invention. The user can confirm that the trip state (position) is visible through colors, letters, symbols, or height difference through the opening portion 5a of the auxiliary cover 5.

At this time, as the holder restraint portion 3b of the nail 3 releases the latch holder 7, the latch holder 7 is elastically driven by a spring not shown and rotates clockwise in FIG. Is released, and thus the opening and closing mechanism is driven in accordance with the elastic energy of the trip spring in the drawing, so that the movable contact is separated from the fixed contact and the circuit is automatically cut off.

Next, the reset position display operation of the nail 3 will be described.

As can be seen in FIGS. 2 and 4, when the user operates the handle 4 to the reset position (ie, the off position), the nail 3 is moved as shown in FIG. 4 by the contact pressure of the handle 4. Rotate counterclockwise. Accordingly, as the reset display portion 3a-1 of the display portion 3a of the nail 3 is located below the opening portion 5a of the auxiliary cover 5, the wiring breaker, in particular, the opening and closing mechanism 9 according to the present invention. The user can confirm that the reset state (position) is visible through the color, character, symbol or height difference through the opening portion 5a of the auxiliary cover 5.

At this time, as can be seen in the enlarged view of the circle of FIG. 4, as the holder restraint portion 3b of the nail 3 restrains the latch holder 7, the latch is also restrained by the latch holder 7. As the trip spring shown in the figure is constrained in a state in which the elastic energy is stored, the opening and closing mechanism becomes a state in which a trip operation is possible, and the handle 4 is in a reset state in which a ready state in which an on position operation is possible is made.

Further, in order to test whether the circuit breaker according to the present invention can be normally tripped, a screw driver is pushed through the opening portion 5a of the auxiliary cover 5 to push the nail 3 to forcibly rotate clockwise. In this case, the trip display part 3a-2 of the display part 3a of the nail 3 is located below the opening part 5a of the auxiliary cover 5, so that the user is in a trip state (position). The opening portion 5a of the subsidiary cover 5 is indicated by color, character, symbol or height difference, and at the same time, the holder restraint portion 3b of the nail 3 releases the latch holder 7. As the latch holder 7 is elastically driven by a spring (not shown) and rotates clockwise in FIG. 5, the latch (not shown) is released, and thus the opening and closing mechanism is driven in accordance with the elastic energy force of the trip spring (not shown). The movable contact is separated from the fixed contact A trip operation is performed in which the circuit is automatically cut off.

As described above, the circuit breaker for wiring according to the present invention is capable of confirming the visibility of the reset position and the trip position according to the indication of the display portion of the nail through the opening of the auxiliary cover, and to operate the opening / closing mechanism by directly operating the nail through the opening. Test is possible.

As described above, the circuit breaker for wiring according to the present invention can easily check the current operation state (position) of the reset position and the trip position by color, character, symbol, or step through the display portion of the nail.

In addition, by providing a circuit breaker according to the present invention by improving the nail and the auxiliary cover existing in the circuit breaker to display the trip position and the reset position, there is no need to additionally configure the device for a separate display It is possible to obtain a simple operation position display device that can be simple and minimize cost increase.

1 is a perspective view showing the appearance of the assembly of the opening and closing mechanism and the tripping mechanism of the circuit breaker according to the present invention,

2 is an external perspective view of the circuit breaker for showing the operation state when the opening and closing mechanism in the reset circuit breaker according to the present invention to the outside,

3 is an external perspective view of the circuit breaker for showing the operation state to the outside when the opening and closing mechanism in the circuit breaker according to the present invention,

Figure 4 is a partial longitudinal cross-sectional view showing the end of the wiring breaker in order to show the operating state of the operation state display device of the opening and closing mechanism to display the reset state in the wiring breaker according to the present invention is an enlarged view of the main part,

FIG. 5 is a partial longitudinal cross-sectional view and a main part enlarged view of the circuit breaker in which the upper end of the circuit breaker is terminated in order to show an operation state in which the operation state display device of the open / close mechanism displays a trip state in the circuit breaker according to the present invention.

* Explanation of symbols on the main parts of the drawings

1: upper cover 2: lower enclosure

3: nail 3a: display part

3a-1: Reset display section 3a-2: Trip display section

3b: holder restraint part 3c: lower body part

3d: rotating shaft part 4: steering wheel

5: auxiliary cover 5a: opening

5b: handlebar

6: trip mechanism 6a: shooter member

7: latch holder 8: side plate

9: switchgear 10: circuit breaker

Claims (6)

A circuit breaker comprising a switch mechanism having a mechanism for opening and closing a circuit, and a trip mechanism (TRIP MECHANISM) for triggering the switch mechanism to operate in a circuit break position when an abnormal current on the circuit is detected. A latch holder (LATCH HOLDER) capable of restraining or releasing a latch included in the opening / closing mechanism; A reset position for restraining the latch holder and a trip position triggered by the trip mechanism to release the restraint of the latch holder to trip the opening / closing mechanism; A nail having a display portion corresponding to each of the positions NAIL; And An opening part provided at a position where the upper part of the nail can be viewed to expose and display the display part of the nail to the outside and to allow artificial access to the nail for a test, and the handle for manual operation of the opening and closing mechanism And a subsidiary cover having a handle operating tool for allowing movement. The method of claim 1, The display portion of the nail, And a reset display unit and a trip display unit for displaying the corresponding positions in a color body distinguished corresponding to each of the reset position and the trip position. The method of claim 1, The display portion of the nail, And a reset display unit and a trip display unit which display the corresponding position by a character or symbol distinguished corresponding to each of the reset position and the trip position. The method of claim 1, The display portion of the nail, And a reset display unit and a trip display unit which are formed to be stepped with each other so as to be distinguished corresponding to each of the reset position and the trip position. The method of claim 1, The nail is, A holder restraining portion extending to contact the latch holder to restrain or release the latch holder; And And the display portion extending upwardly toward the opening portion side of the auxiliary cover and displaying the reset position and the trip position on the upper surface, respectively. The method of claim 5, The trip mechanism, A rotatable shooter member having a restrained position and a rotatable position, A trip bar having a hook portion having a position for restraining or releasing the shooter member, As the hook portion of the trip bar releases the shooter member, the shooter member rotates to strike the lower body portion of the nail, and as the nail rotates, a display portion for displaying a trip position among the display portions of the nail is provided in the opening portion of the auxiliary cover. Circuit breaker, characterized in that configured to be located below.

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