KR830000327Y1 - Auxiliary Removal Device for Circuit Breaker - Google Patents

Abstract

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Description

Auxiliary Removal Device for Circuit Breaker

1 is a side view showing a first embodiment of the auxiliary removing device according to the present invention in a partial cross-sectional view.

2 is a cross-sectional view showing the attachment of the active part of the auxiliary elimination device in the range of the fixed contact piece of the brake switch.

3 is a longitudinal sectional view of the mounting table as a single member.

4 and 5 show the cover pieces in two directions perpendicular to each other.

6 and 7 are side and cross-sectional views of another embodiment of the auxiliary elimination device.

8 and 9 show the cover pieces in two directions perpendicular to each other.

10 and 11 are two cross-sectional views of the mount.

12 is a diagram showing an example of a state in which the auxiliary eliminating device is coupled to a circuit breaker.

The present invention is an auxiliary removal device for a circuit breaker having an electromagnet, a braking switch inserted in the excitation current circuit and operable at opening by a movable part of the circuit breaker, and a mount for the electromagnet and the braking switch. It is about.

This type of auxiliary elimination device is known, for example, on page 8 of the publication GET-2779D issued by General Electric.

One application of this type of auxiliary elimination device is the elimination of circuit breakers by remote operation.

The brake switch serves to remove the electromagnet immediately after the removal is performed to avoid overload.

In this way, the electromagnet can be finished with a small one.

The known auxiliary removal apparatus includes a series of metal members, as described in the above printed matter, and its production requires a number of processing steps.

At this time, the brake switch is attached to the mounting table of the auxiliary removing device as a separate component.

An object of the present invention is to simplify the configuration of the auxiliary removing device and to reduce its size.

According to the present invention, the object is achieved by attaching an electromagnet to a mounting table made of synthetic resin, which is constituted as a braking switch and a case, has a projection for supporting the auxiliary removing device to the circuit breaker.

At this time, since each part of the brake switch can be attached to the mounting table, a special case for the brake switch is omitted.

It is advantageous to install on the mount a seal for receiving a contact element operatively arranged and a fixed contact piece cooperating therewith, and a guide opening on the operating side of the movable contact element.

A stationary contact piece may be attached to the mounting table in the seal. In order to simplify the assembling of the auxiliary removing device in particular, as an embodiment of the present invention, the seal of the mounting table can be closed by a cover piece made of synthetic resin extending beyond the opening on the side, and the cover piece is provided with a mounting surface for the electromagnet. And in a portion extending beyond the opening, the opening is in line with the opening of the mounting table and has an opening for passing the attachment element to the electromagnet.

In this way, the electromagnet, the cover and the mounting table are coupled to each other by the attachment element. It is also advantageous if the pieces of the cover have arms for engaging the interior of the mounting table, and these arms fix the contact pieces at the bar of the thread and also have grooves for guiding the contact connecting pieces on the sides opposite to each other. This eliminates the special attachment to the stationary contact piece.

Normal joint action between the contact connecting piece and the fixed contact piece can be achieved without any trouble by the groove of the cover piece.

At the same time, anti-rotation of the operation side in which the contact connecting piece is inserted is also achieved. The cover piece may be guided by the arm so that it may not be rotated, and the groove | channel for the connection line which communicates with the contact piece of a fixed position may be formed between the arm of the cover piece and the mounting table.

The structure of the cover piece can also be complemented by connecting devices such as solder pieces, terminals, and the like.

Hereinafter, the present invention will be described in more detail with reference to the sealing examples shown in the drawings.

The auxiliary removing device 1 shown in FIG. 1 has a mounting table 2 shown in cross section, and the mounting table is made of a suitable synthetic resin, for example, a thermoplastic resin.

All active parts of the auxiliary removal device are attached to this mount. Removal is carried out by an electromagnet 3 having a fitting 4, an azacoil 5 and a plunger iron core 6.

By the return spring 7, the plunger core 6 is supported in the rest position shown. When the excitation coil 5 is plunged through the connecting leads 9 and 10, the plunger core 6 is attracted and the rod 11 coupled thereto performs the movement, and the movement is performed in a suitable manner. Can be delivered to the removal device of the breaker.

As can be seen from FIG. 3, the attachment table 2 is comprised as a hollow body, and the seal 12 is formed.

This seal has an opening 13 on the side facing the electromagnet 3 and an opening 14 for guiding the operating side 15 on the opposite side. In addition, two side protrusions 16 used to fix the auxiliary removing device 1 to the case of the circuit breaker are protruded from the mounting table 2.

In the assembled state of the auxiliary removing device 1 shown in FIG. 1, the opening 13 of the mounting table 2 is covered with the cover nail 17 shown in FIG. 4 and FIG. Closed by). The cover piece 17 is likewise made of a suitable synthetic resin such as a thermoplastic resin.

Starting from the part covering the opening 13, the cover piece 17 has two arms 21, 22, and opposing walls of the seal 12 of the mounting table 2 to receive these arms. Corresponding grooves are formed in (23) and (24).

The lengths of the arms 21 and 22 are fixed in contact with the recesses 25 and 26 by the bar of the seal 12 when the cover piece 17 is placed on the mounting table 2. Pieces 27 and 28 are selected to be fixed.

In this position, the arms 21, 22, together with the grooves 30, 31 facing each other, extend through the side holes of the operating side 15 and to the metal pins 32 serving as contact connecting pieces. To form a guide.

A compression coil spring 33 abuts on the metal pin 32, and the other end of the spring is supported by the recess 34 of the cover piece 17.

The above-mentioned part forms one braking switch as a whole, and this switch is closed in the resting state, and is connected in series with the excitation coil 5 of the electromagnet 3.

For this reason, familiar connection line 10,36 is shown by sectional drawing in the fixed contact piece 27,28 in FIG.

In order to wire these connection lines, the recesses 37 and 38 are formed in the arms 21 and 22 of the cover piece 17, and these recesses are formed in the seal 12 of the mounting table 2. Wiring grooves are formed with the walls of the wall.

In order to connect the other connection line 9 of the excitation coil 5 with the external connection line 35 before it, the soldering piece 41 is arrange | positioned in the recessed part 40 in the mounting base 2.

The second friendly external connecting line 36 is guided through one of the direct wiring grooves (the recesses 37 and 38 of the arms 21 and 22) and is connected to the fixed contact piece 28. have.

In the assembled state of the auxiliary removing device 1, the mounting table 2, the electromagnet 3 and the cover piece 17 are coupled to each other by a single screw 42.

In order to insert this screw, an opening 43 is formed in the mounting table 2, and an opening 45 is formed in the portion 44 of the cover piece 17 connected to the mounting surface 20. The electromagnet 3 is then placed on the cover piece 17.

As can be seen from the above description, the only steps necessary for assembling the auxiliary removal apparatus 1 until the screw 42 is inserted into the fitting 4 of the electromagnet 3 are indentation and insertion.

First, the fixed contact pieces 27 and 28 are inserted into the recesses 25 and 26 of the seal 12 of the mounting table 2 together with the connection lines 10 and 36. Subsequently, an operating shaft 15 into which the metal pin is inserted and the compression coil spring 33 is inserted is introduced into the opening 14 of the mounting table 2. Subsequently, the cover pieces 17 are introduced into the arms 21 and 22 into the grooves 23 and 24 at the edge of the seal 12 of the mounting table 2.

When the electromagnet 3 is placed on the cover piece 17, the whole is pushed against the elasticity of the compression coil spring 33, and the screw 42 is inserted into the fitting 4 of the electromagnet 3, Assembly is over.

The side protrusions 18 installed on the cover pieces 17 together with the mounting table 2 form grooves for fixing external connection lines.

In another embodiment of the auxiliary elimination device 50 according to FIGS. 6 to 11, parts similar in principle to those of the embodiment of FIGS. 1 to 5 are laid.

Attachment 51 serves to attach all active elements of the auxiliary removal device. The mounting table 51, the electromagnet 53, and the cover piece 54 are coupled to each other by the screw 52.

The mounting table 51 includes a seal 55 in which the fixed contact pieces 60 and 61 are fixed by the arms 56 and 57 of the cover piece 54. The working side 62 is formed in a rectangular shape unlike the working shaft 15 of the above embodiment, and a cutout 63 is formed.

During this cut-out, the movable switchgear of the low-voltage circuit breaker can be inserted at the time of opening. The cover piece 54 simultaneously serves as a mounting table for the soldering lead 64, and the soldering piece 54 connects the connecting line 65 of the electromagnet 53 with an external connecting line. The other connecting line 66 of the electromagnet 53 is integrally connected with the fixed patch 60.

The mounting table 51 and the cover piece 54 each have one opening 66 or opening 67, and these openings are provided when the cover piece 54 is introduced into the seal 55 of the mounting table 51. , Side by side in a straight line.

In the assembled state of the auxiliary elimination device 50, the screw 52 extends past these openings. The projections 70 and 71 of the mounting table 51 are used to attach the auxiliary removing device 50 to the circuit breaker.

FIG. 12 shows a state in which the auxiliary removing device 50 according to FIGS. 6 to 11 is coupled to the low voltage circuit breaker and cooperates with it.

The circuit breaker 75 has an insulator case 76, which includes an upper half 77, a lower half 78, and an operation handle 80 of an insulator protruding from an opening of the upper half 77.

The electric current diagram partially shown in FIG. 12 includes a movable opening / closing piece 81 which is supported to be swingable on the opening / closing piece mounting table 82 and connected to the connecting device 84 by the flexible conductor 83. Doing.

The same connecting device is installed at the other end of the insulator case 76 for connection with the fixed opening and closing piece which works together with the movable opening and closing piece 81. On of the movable opening and closing piece 81. The off is performed by the operation knob 80, which is well known in this kind of low voltage circuit breaker, and thus detailed illustration is omitted.

Details of suitable drive mechanisms are described, for example, in US Pat. No. 3,632,939.

The automatic opening of the circuit breaker 75 is similarly made by the removal side 85 which locks the opening and closing mechanism of the circuit breaker 75 in a known manner. All removal devices mounted on the circuit breaker 75, for example, the electromagnet removal device in which the movable iron core 86 is indicated in FIG. 12, the thermal removal device in which the bimetal plate 87 is displayed, and the auxiliary The removal device acts on the removal shaft 85.

This removal shaft serves to remove the circuit breaker 75 by remote operation. For this reason, the exciting coil of the electromagnet 53 is connected with the appropriate electric current source by the connection lines 92 and 93 derived from the breaker.

Thereby, the rod 90 of the electromagnet 53 is pushed toward the lever arm 91 of the removal shaft 85, and the removal shaft rotates counterclockwise by this. As a result, the lock of the opening / closing lock (not shown) is peeled off, and the movable opening and closing piece 81 falls off from the corresponding fixed opening and closing piece.

During this opening movement, the movable opening piece 81 abuts on the operation shaft 62 of the auxiliary removing device 50, so that the fixed contact pieces 60, 61 are lifted by the metal pin 69. And the current circuit of the electromagnet 53 is opened. (Fig. 7)

Thereby, the voltage is applied to the electromagnet 53 only for a short time, thus ensuring that the overload state is not reached.

Subsequent operation of the auxiliary eliminating device 50 is enabled by the circuit breaker 75 being returned and closed again by the operation knob 80.

Simultaneously with this closing, the movable opening and closing piece 81 is again shown in FIG. 12, that is, the operating side 42 is removed from the movable opening and closing piece 81, and the metal pin 69 is again fixed by the connecting pin ( 60 and 61 occupy the position to connect.

Since the operating shaft 62 is made of synthetic resin of an insulating material, electrical insulation between both the movable opening and closing pieces 81 and the auxiliary removing device 50 is supplemented.

Claims (1)

An auxiliary removing device for a circuit breaker having an electromagnet and a magnetic current circuit thereof, the brake switch being operable at the time of opening by the movable part of the circuit breaker, and an attachment stand for the electromagnet and the brake switch, wherein 2) is made of an insulating synthetic resin, constituted as a case of the braking switches 27, 28, 32, and is provided with a projection 16 for supporting the auxiliary removing device 1 to the circuit breaker. Auxiliary removal device for circuit breaker.