KR100186376B1 - Sub-switch of a vacuum electromagnetic contactor - Google Patents

Abstract

The present invention relates to an auxiliary switch (S) for opening and closing a vacuum electromagnetic contactor used in a primary transformer, a main power source or a high-voltage electric motor, and more particularly, And a plurality of compartments (1) formed at appropriate intervals in order to improve the function of the delay contacts so as to stabilize the system. The compartment (1) is provided so as to be opposed from the center of the enclosure (2) A fixed terminal 3 fixedly disposed at each end of the housing 2 and having a fixed contact 3a at each end thereof and a fixed terminal 3 fixed to each of the compartment positions 2 in an enclosure 2 so as to be reciprocated along the longitudinal direction of the enclosure 2, Is moved by contact between the movable rod 6 on which the bending portion 5 having the contact pressure springs 4 are formed and the adjacent bending portions 5 inserted into the movable rod 6, A movable contact 7a is provided so as to abut on the fixed contact 3a, And each of the movable terminals 7 is symmetrically refracted from the center of the enclosure 2 so that the abutting portion contacting the bent portion 5 is symmetrically refracted from the center of the enclosure 2 so that when the movable rod 6 moves, Since it is difficult to extend the auxiliary switch S due to the spatial limitation due to the provision of the conventional auxiliary switch S inside the contactor main body B, Since the auxiliary switch for opening and closing the vacuum electromagnetic contactor is provided outside the contactor main body B, the auxiliary switch S can be expanded, so that the multi-contact contact having the delay function can be realized, The auxiliary terminal is provided with an auxiliary switch for opening and closing the vacuum electromagnetic contactor.

Description

Auxiliary switch for opening and closing vacuum contactor

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an auxiliary switch for opening and closing a vacuum electromagnetic contactor used in a primary transformer, a main power source, or a high-voltage electric motor, and more particularly, To an auxiliary switch for opening a vacuum electromagnetic contactor.

In general, a vacuum electromagnetic contactor according to the prior art is used for opening and closing a primary side of a transformer, opening and closing a main power source, and starting a high-voltage electric motor. Since the vacuum electromagnetic contactor has a main purpose of opening and closing, the lifetime of the opening and closing must be as long as one million or more, and the auxiliary switch is simultaneously opened and closed according to the opening of the vacuum electromagnetic contactor, Stable contact output should be provided over the life span.

The structure of the vacuum circuit breaker and the vacuum electromagnetic contactor to which the auxiliary switch according to the related art is applied is such that the auxiliary switch S is fixedly installed in the contactor main body B by the auxiliary switch supporter 11, There is provided an auxiliary switch drive lever 9 which is in contact with the protruding end of the movable rod 6 which flows in the auxiliary switch S and urges the movable rod 6 while rotating according to the drive of the drive body 8 .

2 and 3 show operation diagrams of the state in which the above-described auxiliary switch for opening and closing S constitutes the open circuit (OFF) and the closed circuit (ON), respectively, A fixed terminal 3 having a fixed contact 3a is fixedly installed between each of the enclosures 2 arranged in parallel and fixed to the enclosure 2, On the shaft, a movable terminal 7 having a movable contact 7a is coupled to a position corresponding to the fixed contact 3a while being resiliently biased by a spring 12. As shown in Figs. 4 and 5, the movable terminal 7 has a central both side portions inwardly depressed and has a generally flat structure.

2, the upper movable contact 7a contacts the upper fixed contact 3a to maintain the on state, and the lower movable contact 7a maintains the on state, The auxiliary switch assembly is rotated in the clockwise direction by turning the auxiliary switch assembly in the clockwise direction while the actuator 8 is started when the vacuum electromagnetic contactor is operated, 6).

As a result, the movable contact 7 is moved together with the movable rod 6 so that the contact points 3a and 7a are separated and the pressing operation is continuously performed by the auxiliary switch driving lever 9 and the upper movable contact 7a Contact the intermediate fixed contact 3a and the lower movable contact 7a respectively contact the lower fixed contact 3a to maintain the ON state as shown in Fig. By using the change of each contact point of the auxiliary switch S, the on / off state is recognized from the main circulation of the vacuum electromagnetic contactor, and the interlock function between the devices can be performed.

However, since the auxiliary switch for opening and closing the vacuum contactor as described above has a flat plate, the bending deformation occurs frequently during the opening and closing operation, so that during the reciprocating operation of the movable rod 6, There is a problem that contact failure may occur and thus the system becomes unstable.

In addition, since the conventional auxiliary switch S is installed in a limited space inside the vacuum electromagnetic contactor, the extension of the auxiliary switch S for stabilizing the auxiliary switch S is restricted, and OT (Over Travel) and corresponding contacts 3a It is necessary to expand the size of the spring 12 and the movable rod 6 inevitably.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an auxiliary switch for opening and closing a vacuum electromagnetic contactor capable of stabilizing a system by improving contactability and delay contact function between contacts, It has its purpose.

1 is a partial cross-sectional view showing an installation structure of an opening / closing auxiliary switch applied to a conventional vacuum electromagnetic contactor,

2 is an operation diagram of a state in which a conventional opening / closing auxiliary switch constitutes an open circuit (OFF)

3 is an operation diagram of a state in which a conventional opening / closing auxiliary switch constitutes a closed circuit (ON)

4 is a front view of a movable terminal to which a conventional opening / closing auxiliary switch is applied,

5 is a plan view of a movable terminal applied to a conventional auxiliary switch for opening and closing,

6 and 7 are partial side views of a vacuum electromagnetic contactor showing a mounting structure of an auxiliary switch for opening and closing according to the present invention,

Fig. 6 is an operation diagram of a state in which the auxiliary switch constitutes an open circuit (OFF)

Fig. 7 is an operation diagram of a state in which the auxiliary switch constitutes a closed circuit (ON)

8 is an assembled state diagram showing the structure of the auxiliary switch for opening / closing according to the present invention,

9 is an enlarged view of part A of Fig.

DESCRIPTION OF THE REFERENCE NUMERALS

B: Contactor main unit S: Auxiliary switch

1: compartment 2: enclosure

3: Fixed terminal 3a: Fixed contact

4: Voltage spring 5:

6: movable rod 7: movable terminal

7a: movable contact 8:

9: Auxiliary switch drive lever 10: Return spring

According to an aspect of the present invention, there is provided an auxiliary switch for opening and closing a vacuum contactor, comprising: an enclosure having a plurality of compartments formed at appropriate intervals; A movable rod having a fixed terminal provided at one end thereof with a fixed contact and a bent portion elastically supported in the housing so as to reciprocate along the longitudinal direction of the enclosure and having a contact spring incorporated at each of the compartment positions; And movable terminals provided with movable contacts so as to be brought into contact with the respective fixed contacts, and the number of contacts can be expanded.

The movable terminals are symmetrically refracted from the center of the housing so that the contact portions contacting the bent portions are delayed in contact between the contacts when the movable rod moves.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

8 and 9, an auxiliary switch for opening a vacuum contactor according to the present invention includes an enclosure 2 having a plurality of compartments 1 formed at appropriate intervals, A fixed terminal 3 fixed to the compartment 1 so as to face the compartment 1 and having a fixed contact 3a at one end thereof and an enclosure 2 for reciprocating movement along the longitudinal direction of the enclosure 2, A movable rod 6 which is resiliently supported in the movable rod 6 and has a bending portion 5 in which a contact spring 4 is embedded at each of the compartment positions and a bending portion 5 inserted into the bending portion 5 And a movable terminal 7 that is moved by contact and has a movable contact 7a so as to abut on the fixed contacts 3a. The movable terminals 7 are provided with contact portions for contacting the bending portions 5 Is symmetrically refracted from the center of the enclosure 2 so that when the movable rod 6 moves, As shown in Fig.

6 and 7 are partial side views of the vacuum electromagnetic contactor showing the installation structure of the auxiliary switch for opening and closing according to the present invention, in which the auxiliary switch S is in a state of constituting an open circuit (OFF) The auxiliary switch S for opening and closing is fixed to the outside of the contactor main body B so as to be able to expand the number of contacts and is connected to a movable rod 6 for driving the movable rods 6 while rotating in accordance with the driving of the actuating body 8 are provided.

6, when the movable rod 6 advances due to the elasticity of the return spring 10, the bent portions 5 of the auxiliary switch S move to the movable terminal The upper movable contacts 7a are brought into contact with the upper fixed contacts 3a corresponding thereto and at the same time the plurality of lower movable contacts 7a are brought into contact with the corresponding lower fixed contacts 3a, When the vacuum electromagnetic contactor is operated, the driving body 8 is started and the auxiliary switch driving lever 9 is turned clockwise by rotating the movable rod 6 .

As a result, the movable contact 7 is moved together with the movable rod 6 so that the contact points 3a and 7a are separated and the pressing operation is continuously performed by the auxiliary switch driving lever 9 and the upper movable contact 7a And the lower movable contacts 7a are brought into contact with the corresponding lower fixed contacts 3a, respectively, so that they are kept in the ON state as shown in FIG.

At this time, since the contact portion of the movable terminal 7 abutting the bent portion 5 is bent, the contact between the contacts 3a and 7a is delayed when the movable rod 6 moves.

The operation principle of the interlocking operation between the bent portion 5 of the movable rod 6 and the movable terminal 7 will be described in more detail. Is I. At this time, the upper contacts 7a are slid by the structure of the bent portion and the movable terminal 7 between the operation distance a, so that the movable contact 7a and the fixed contact 3a are in contact with each other, Exercise. Since the lower contacts 7a do not transmit a load to the contact springs 4 during the operation distance c, they are linearly moved. When a load is applied to the contact springs 4, the sliding contact is made and the movable contacts 7a The stationary contact 3a is isolated. On the other hand, when the auxiliary switch S is switched from the off state to the on state (Fig. 7), the opposite operation is performed.

It is needless to say that the ON / OFF state of the main circuit part of the vacuum electromagnetic contactor is recognized by using the change of each contact point of the auxiliary switch S and the mutual interlock function between the devices can be performed.

The effects of the present invention, which can be expected from the above-described configuration and operation, are as follows.

It is difficult to extend the auxiliary switch S due to the spatial restriction caused by the provision of the conventional auxiliary switch S inside the contactor main body B. On the contrary, in the auxiliary switch for opening and closing the vacuum magnetic contactor according to the present invention, It is possible to extend the auxiliary switch S so as to realize multi-contact contact with a delay function, thereby stabilizing the system, and even if the movable terminal 7 is used for a long time, So that the contactability is maintained constantly.

Claims (2)

A fixed terminal fixed to the compartment so as to be opposed to the compartment from the center of the enclosure and having fixed contacts at one end thereof, A movable rod which is elastically supported in the housing and which is provided with a bending portion in which a contact spring is embedded in each of the compartment positions so as to be able to move in contact with each adjacent bent portion inserted in the movable rod, And an auxiliary switch for opening and closing the vacuum electromagnetic contactor, the movable contact terminal being provided with a movable terminal and capable of expanding the number of contacts. The vacuum contactor as claimed in claim 1, wherein each of the movable terminals has a contact portion for contacting the bent portion symmetrically refracted from the center of the housing to delay contact between the contact portions when the movable rod moves. switch.