JPS60198015A - Electromagnetic contactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a M-boron contactor designed to improve the life span and to improve the breaking performance.

[Prior art]

Generally, this type of W magnetic contactor is used to start and stop three-phase induction W motors, etc., but recently it has been used for automation. With the expansion of its use as a control connection for the operation, stopping, etc. of electric motors that drive labor-saving devices, etc., the use of electric motors that can cope with the frequent repeated starting and stopping of electric motors has increased. It is required to be connected to a W magnetic contactor. Also.

Along with this, there is also a call for higher cutoff levels for 1c and fi magnetic contactors. - Figures 11 to 14 show conventional electromagnetic contactors, but for these reasons, (1) is a mounting base made of a metal steel plate, and (1) has multiple mounting holes (1a) used when installing the σ magnetic contactor body ft.
is provided. (2) is a base made of an insulating material, and is fixed to the mounting base (1) with screws (3). (4) is a fixed core made of laminated silicon steel plates, an operating coil (5) is attached to this fixed core (4), and a leaf spring (6) is installed as a cushioning material in the gap with the mounting base (1). ) are provided. (7) is the above fixed core (4)
The operating coil (5
) is configured to be attracted to the fixed iron core (4) when energized. A crossbar (8) is made of an insulating material and is connected to the movable iron core (7) via a pin (9). Ql) is this crossbar (8) and mounting base (1)
) so that the main circuit of this electric contactor is normally started.
-It's pushing up. (b) is a movable contactor equipped with a contact point (lla), and a holding hole (
8a) and is pressurized by a pressure spring (2). 0 is a fixed contact which is attached to a contact (18a) 1 opposite to the contact (11a) of the movable contact αp, and this fixed contact I is fixed to the terminal (to) by a screw a4, and is connected to the terminal Qf1. Lυ is fixed to HaPace (2) by screw (2) α force. (To) is a terminal screw that is connected to the main circuit wire, and is provided on the terminal (To). The arc box is made of insulating material and is fixed to the base behind a screw (E). The arc box moe has a guide part (i9a) for the crossbar (8), a ceiling part (19b) that prevents the arc from ejecting upward, and a tIl plate (190) that prevents the arc and hot gas from ejecting directly to the outside. The fin is a grid with a V-shaped groove (21a) in the center, with specified gaps, and specified plates a are combined.

It is fixed to a cape (22a), (221)) made of an insulating material and installed in the arc box 01.

Next, the hemistatic operation of this electromagnetic contactor will be explained. Third
When the main circuit shown in the above is open, when 1 voltage is applied to the operating coil (5), zero bundle is generated between the fixed iron core (4) and the movable iron core (7), causing no pull. Shibane α0
The movable core (7) moves against the biasing force of the fixed core (4).
I get sucked into it. At this time, the crossbar (8) that is connected to the movable nose eshin (7) also moves in the same way, and the movable wJ contact (b)
The contact (lla) is the contact (18a) of the fixed contact (2)
At the same time, a predetermined pressure is applied by the pressure spring (2) to close the main circuit.When the operation coil (5) is demagnetized, the movable core is (7) is Il! from the fixed core (4)! III
IIs moves, and the crossbar (8) also moves in conjunction with this movable iron core (7). Therefore, this chromeper(s)-At
While returning to the state shown in Fig. 8, the movable contact Qυ
The contact (lla) of the fixed contact 〇] and the contact (18a) of the fixed contact 〇] are opened. Upon this separation, an arc is generated between the contact point (lla) and the contact point (18a) at a portion indicated by a circle in FIG. 8.

The movement of the arc from when the arc occurs until the current is cut off t - A stone explained using the 61st clause. The arc extinguishing chamber shown in FIG. 8 is symmetrical, so only one side of it is shown in the fifth section.

5th N■ shows a state in which the movable contact (lla) and the fixed contact (18a) are closed. When the movable contact (tta) and the fixed contact (18a3 are opened in the energized state, an arc (2) is generated between the movable contact (lla) and the fixed contact (18a) as shown in No. 5N (6). The contact separation distance increases with time until it reaches a certain distance #.This arc (c), the current flowing through the movable contact Q1 and the fixed contact (to) and the grid Q
The arc (2) is driven and extended by η as shown in Figure 6 (0), and one end of the arc (2) is connected to the movable contact (lla
) to the tip of the movable contact (b), and the other end of the arc (2) is transferred from the fixed contact (18a) to the tip of the fixed contact (to). Next, there is already a dielectric breakdown between the protruding part of the arc ■ shown in the 5th - mark and the grid QD, so one end of the arc (to) is the tip of the 8th sheet of the grid (C) shown in the 51st (@). The other end of the arc (c) also becomes grid e.
The arc 8!3 is transferred to the tip of the first sheet of 2D and drawn between the grids (2) as shown in FIG.

In such an electromagnetic contactor, one end of the arc (c) is connected to the movable contact (lla) and the movable contact (o) I:/)@ part, and the other end of the arc (c) is connected to the fixed contact (taa). It is easy to stick to the surface of the fixed armature (to), and an arc (a) is generated and remains at the above-mentioned arc point until the current is cut off. For this reason, the wear of the high @ii possible #j contact (lla) and the fixed contact (lla) is large, and the wear of the movable contact Ql) and fixed contact 〇3 is also large, which shortens the life of the user. This was one of the causes of h.

Also, as can be seen from the 50th (0), the grid Q force is 5
Although there are 8 grids (c), only 8 grids are working to cut off the arc. This is a drawback of this type of electromagnetic contactor; only the grid corresponding to the main contact gap +21) can effectively cut off the actual arc (C); D is not used effectively. For this reason, the direction of the breaking force, h (L, improvement of the cutting flow, improvement of the breaking pressure)
It was a non-layered magnetic contactor.

I'm hooked, the conventional magnetic contactor has been carefully designed as described above.
Therefore, the thermal energy of the arc generated between the contacts is transferred to the movable contact α) and the fixed contact (to). Since the movable contact (Ql) has a smaller heat capacity than the fixed contact (to), the temperature of the movable contact (Ql) increases abnormally during one inch, etc., causing insulation deterioration of the holding hole (8a) of the crossbar (8). This resulted in problems such as crossbar breakage and phase-to-phase short circuits.

[Summary of the invention]

This invention was made to eliminate the drawbacks of the conventional device. It has a cuttable contactor with a closed contact, and a fixed contactor with a closed contact mounted on each of the electrical IIA side terminal and load side terminal, and there is a grounding box inside the earth box that faces these contacts. multiple pictures
? In a magnetic contactor that extinguishes the arc by inserting a J-type, one end of the arc is connected to the movable contact and the 7'th conduction gap between the movable contact and the fixed contact. Fuki the arc runner, the above commutation i! The tip of the birch is configured in a row shape, and the bottom surface of the bent shape is parallel to the surface of the movable contact when the movable contact and the fixed contact are opened.

The movable contact in the contact is located on the same level as or above the unjoined ^ surface, and the elongated tip of the commutation +fftii is arranged parallel to the grid, fixed contact, and arc runner, and the υ shape of this transmission rK coffin is Ai! A plurality of grids are arranged in parallel between the parallel tip part and the arc runner installed parallel to the fixed contact. The present invention provides a dark contactor having all the following features.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to the drawings.

That is, as shown in the seventh factor, one end of the arc is connected to a movable contact (
Ila), a commutation ring for transferring from the movable contact Q1, and an arc runner electrically coupled to the fixed contact (2) and disposed facing the movable contact Qf). The tip of the commutation force 11i (to) is configured in a υ shape,
And the °U-shaped bottom surface of the commutation electrode is connected to the movable contact α.
℃, and when the movable contact (11L3 and fixed contact (1B&) The V-shaped tip of the contact ring is arranged parallel to the grid, the fixed contact (to), and the arc runner (to), and is fixed to the parallel part of the low-shaped tip of this commutation electrode (2). The arc runner (
By arranging a plurality of grids QtJ in parallel between the contacts, the structure allows the arc generated between the contacts to be quickly separated and interrupted by the commutation contact ring, the grid eD, and the arc runner.

Also, No. 6 (2) shows the shape of the commutation drunkenness.

The 60th commutating electrode I23 is symmetrical, and only half of it is shown. Note that the other parts are the same as those shown in FIGS.

Next, the movement of the arc of the °C magnetic contactor according to the present invention will be described in the eighth section.
Explain using meat.

Figure 8) shows the movable contact (Ila) and the fixed contact (18a).
indicates the closed state. Movable contact (oh
) and the fixed contact (18a,), the movable contact (ll
An arc (a) is generated between a) and the fixed contact (18a) as shown in the m8 diagram (6). Further, the contact separation #1 increases to a predetermined value with the passage of time.

This arc @ is military law and commutation il flowing through the movable contact α9 and fixed contact (to)! The pole @, the griffed (2), and the arc runner (c) are driven and extended as shown in No. 8/(Q), and one end of the arc (a) is connected to the movable contact C11a) as shown in No. 71NB). To the tip of C1υ, the other end of the arc (2) is a fixed contact (18a)! and are transferred to the arc runners (to) respectively. Furthermore, when the contact rA distance (il, A transition occurs from the contact point (Ila) to a commutating current.At the time of transition, the arc (to) becomes an arc due to the current flowing through the movable contact QB and the commutating current flowing through the magnetic material (W), as shown in Figure 9. A strong magnetic field acts on the arc, driving the arc strongly, and as shown in Figure 8(e), one end of the arc (c) transitions from the movable contact C11a) to the commutating electrode very quickly. It will be done. Then, the arc (c) is driven and extended as shown in FIG. It is drawn between arc runners, separated and cooled.

〔Effect of the invention〕

As described above, in the electromagnetic contactor according to the present invention, one end of the arc is transferred from the movable contact C11a) to the commutator 1(2), and the other end of the arc is transferred from the fixed contact (18a) to the arc runner (c). Since the transition occurs quickly, it is possible to significantly improve the life of the LW with less wear and tear on the contacts.

In addition, the five grid sheets inserted between the commutation capacitor and the arc runner (c) all work effectively to cut off the arc that occurs between the contacts.

Since the arc time is shortened and the arc energy is reduced, the breaking performance can be improved.

Also, since the arc does not stick on the movable contact (b),
This has the advantage of preventing breakage of the crossbar (8) due to insulation deterioration of the holding hole (8a) of the crossbar (8), as well as mutual short circuits caused by this.

[Brief explanation of the drawing]

Figure 1 is a front view of the right half of a conventional electromagnetic contactor.
Figure 2 is a bottom view of the right half of Figure 1 in section, Figure 8 is a right side view of Figure 1, Figure 4 is a perspective view of a conventional grid assembly, and Figure 5 is a diagram of a conventional magnetic contactor. Figures 6 to 9 show an embodiment of the present invention, Figure 6 is a perspective view of a commutating electrode and a movable contact, and Figure 7 shows an electromagnetic contactor. Figure 8 is a diagram showing the arc extinguishing chamber part of this electromagnetic contactor and the movement of the arc, and Figure 9 is a perspective view of the commutating electrode and movable contact. It is a drive explanatory diagram. In the figure, (2) is a base made of insulating material, (7)
is the movable core, (8) is the crossbar, and (9) is the movable core pin. 0 is a movable contact, (lla) is a movable contact provided on the movable contact, (2) is a pressure spring, (Ll is a fixed contact. (18a) is a fixed contact provided on the fixed contact, ao is the terminal, a is the earth box, I2υ is the grid, t2
3 is commutation 'sii, w is arc runner, and (c) is arc. Note that the same reference numerals in Figure 5 indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 t. Figure 2 Figure 3 Figure 6 Figure 23 tct Figure 7 2+ Figure 8 1111=\2 111goC 22222ko3 2222===ko2 111= ■1 33 yoyoyo Figure 9 To ■-Arc electric hiba B-Wakiba F-J1 initial power 1to continuation of page 1 @ inventor Kazu1) Yuu-in the erected area

Claims (1)

[Claims] A #J contactor equipped with a contact mounted on a crossbar;
ii) It has fixed contacts equipped with contacts t attached to each of the source side terminal and the load side terminal, and 1-Subokes internal pressure.A plurality of grids facing these contacts are inserted to extinguish the arc. The w-contactor has: a commutating electrode for transferring one end of the arc between the movable contact and the movable contact, and a take runner pneumatically connected to the fixed contact; The tip of the electrode is configured in a υ shape, and the bottom surface of the shape is parallel to the surface of the movable contact, and the movable contact in the movable contact is joined when the movable contact and the fixed contact are opened. Not located on the same level as or above the surface. The elongated tip of the commutation electrode is arranged parallel to the lid, the fixed contact, and the take runner, and the υ-shaped tip parallel to the commutation electrode is parallel to the fixed contact. This is a patented TRW contactor in which multiple O-grids are arranged in parallel between the contactors.