JPH02267827A - Vacuum contactor - Google Patents

Abstract

PURPOSE:To facilitate attachment and removal of an auxiliary switch by providing the auxiliary switch taking the same motion as an electrode according to the connecting and disconnecting directional rotation of an operation lever on one side through an insulating frame. CONSTITUTION:On the upper part of an insulating frame 8, a unit type auxiliary contactor 11 is mounted through an auxiliary contactor mounting plate 12 in such a manner that it is separated from and opposed to the frame by a solid insulating material consisting of a vacuum switch 1 and an insulating mold case and situated on the upper side against the shaft core of a rotating shaft 9. On the lower side, an operating electromagnet 6 for inputting and breaking the vacuum switch 1 is mounted, and the upper end of a movable iron core 4 is fixed to the rotating shaft 9 inputting and breaking three phase portions of the vacuum switch 1 simultaneously by rotation, and the lower part of the core is opposed to the electromagnet 6. A vacuum switch operation lever 3 and an auxiliary operation lever 16 are fixed and connected to the rotating shaft 9 in such a manner that they are mutually opposed against the shaft core of the rotating shaft 9, whereby the unit type auxiliary contactor 11 can be interlocked with the making and breaking of the switch 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vacuum contactor, and particularly to opening and closing operations of an auxiliary contactor.

[Conventional technology]

The structure of a conventional vacuum contactor is as described in Japanese Utility Model Publication No. 63-27408, and will be explained below with reference to the drawings. In Fig. 3, 1 is a vacuum switch, 2 is an insulating mold. Operation rod, 3 is vacuum switch operation lever, 4
is a movable core, 4a is a part of the movable core, and is an auxiliary contactor operating lever that drives the movable element of the auxiliary contactor 11; 5 is a stopper of the movable core; 6 is an electromagnet; 7 is a cutoff spring; 8 is an insulating frame; 9 is a rotating shaft, 10 is a bearing, 11 is a unit type auxiliary contactor, and 12 is an auxiliary contactor mounting plate. Vacuum switches 1 for three phases are mounted in parallel on the top of an insulating frame 8.

By turning on and off the lower electromagnet 6, the movable iron core 4 is driven to rotate the rotating shaft 9, and the vacuum switch operation lever 3 is rotated.
, and the operating rod 2, the vacuum switch 1 is turned on and off for three phases at the same time to open and close the three-phase AC high voltage circuit.

The auxiliary contactor 11 extracts a signal for turning on or cutting off the vacuum switch 1 and transmits it to a control system (not shown), displays the operating status with a lamp, and sends a signal to an interlock circuit such as interlock or release. Used for sending etc.

Since the vacuum switch 1 is used in a high-voltage circuit, in order to ensure electrical insulation, the insulation frame 8 has a large space for the vacuum switch 1 at the top, and a small space for the electromagnet 6 at the bottom. This is necessary to make the vacuum contactor smaller. For this reason, when installing the auxiliary contactor 11, it is necessary to adjust the stroke in relation to the auxiliary contactor operating lever 4a, which is a troublesome work and requires a large number of man-hours. Also, the biggest drawback in the configuration is the insulating frame 1
Because the auxiliary contactor 11 is housed in a narrow space, inspection is extremely troublesome. Since the vacuum switch 1 opens and closes its electrical contacts in a completely sealed high-vacuum container, there is no need to inspect it until it reaches the specified number of switching cycles (100,000 to 500,000 times), but the auxiliary contactor 11 Periodic inspection is required because electrical contacts are opened and closed inside.

This shows the configuration of another conventional example shown in FIG.
is an auxiliary contactor case formed integrally with the side wall of the insulating frame 8. 101 is an insulated movable element of the auxiliary contactor, 102 is a fixed contact, 103 is a movable contact, 104 is a contact spring, 105 is a return spring, and 106 is an auxiliary contactor operating lever, which is fixed to the rotating shaft 9 by a mounting bolt 107. . 10 is a bearing. By turning on and off the electromagnet, the rotating shaft 9 rotates, and the operation lever 106 operates the insulating movable element 101, so that the movable contact 103 connects to the fixed contact 102.
The vacuum electromagnetic contactor, which is configured as an auxiliary contactor that generates a signal to turn on or shut off a vacuum switch by opening and closing, is used in a cubicle as a high-voltage starter for a high-voltage motor, a high-voltage capacitor, and a primary switch for a high-voltage transformer. Used for storage. For this reason, arranging the auxiliary contactor on the side surface not only makes periodic inspection extremely troublesome but also increases the number of man-hours required for wiring work.

[Problem to be solved by the invention]

As described above, in the conventional vacuum contactor, no consideration was given to periodic inspection of the auxiliary contactor, resulting in the following two drawbacks.

(1) Since the auxiliary contactor was housed in a narrow space in the insulating frame, periodic inspection of the auxiliary contactor was extremely difficult, and assembly, adjustment, and wiring were difficult and required many man-hours.

(2) Also, in cases where the auxiliary contactor is integrally formed and placed on the side wall of the insulating frame, it is very difficult to periodically inspect the auxiliary contactor when it is stored in a cubicle, and a lot of work is required for wiring. It cost.

(3) In addition, if the auxiliary contactor is housed in a narrow space or is integrally formed on the side of the insulating frame, the space for the auxiliary contactor is limited, making the plant equipment larger and more complex. Even if it is requested to increase the number of auxiliary contacts when performing control, the number cannot be increased.

An object of the present invention is to provide a vacuum contactor in which an auxiliary switch can be easily attached and detached.

[Means to solve the problem]

The gist is that the auxiliary contactor and the vacuum switch are separated by an insulating frame, the auxiliary contactor is placed in front of the vacuum contactor so that it is above the axis of the rotating shaft, and the vacuum switch operation lever and auxiliary The contactor operating lever and the contactor operating lever are connected to the rotating shaft in opposite directions with respect to the shaft center.

[Effect]

By arranging the auxiliary contactor in this manner, periodic inspection of the auxiliary contactor becomes easy, wiring work 2 assembly and adjustment work becomes extremely simple, and the number of auxiliary contacts can be reduced because there is no restriction on the installation space of the auxiliary contactor. Increased demand can now be met easily. Furthermore, the vacuum switch to which high voltage is applied is separated from the front side of the vacuum contactor by an insulating frame, and the high voltage charging part and the low voltage part are completely separated to improve safety.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

1 is a vacuum switch, 2 is an insulating molded operating rod, 3
is a vacuum switch operating lever, 4 is a movable iron core, 5 is a stopper for the movable iron core, 6 is an operating electromagnet, 7 is a cutoff spring, 8 is an insulated molded case, 9 is a rotating shaft, 10 is a bearing, 11 is a unit type auxiliary contactor , 12 is an auxiliary contactor mounting plate, 1
3 is a fixed side terminal, 14 is a flexible lead wire, 15 is a movable side terminal, and 16 is an auxiliary contactor operating lever. The insulating frame 8 has both side walls 81 . Upper wall 82. Each group partition wall 83, vacuum switch room partition wall 84. Lower wall 85. Front bottom wall 86.
87, the solid insulating case is integrally molded to form a completely partitioned box so that each phase is electrically independent.The upper part has a fixed side terminal 13, a vacuum switch 1. Flexible lead wire 14. The operating rod 2 and the movable terminal 15 are installed in parallel for three phases by inserting an assembly for each phase, and the unit type auxiliary contactor 11 is connected to the vacuum switch 1 via the auxiliary contactor mounting plate 12 to the insulating molded case. 8 are separated by a solid insulator and are mounted facing each other in a scale-like manner so as to be on the upper side of the axis of the rotating shaft 9. In addition, an operating electromagnet 6 for turning on and off the vacuum switch 1 is installed on the lower side, and the upper end of the movable core 4 is fixed to a rotating shaft 9 that turns on and off the vacuum switch 1 for three phases at the same time. Moreover, the lower part is made to face the operating electromagnet 6. The vacuum switch operating lever 3 and the auxiliary contactor operating lever 16 are fixedly connected to the rotating shaft 9 in opposite directions with respect to the axis of the rotating shaft 9, and the unit type auxiliary contactor 11 is connected to the vacuum switch 1. It is configured to be linked to turning on and turning off.

Vacuum switch 1. Operation rod 2. Flexible lead wire 14 and fixed side terminal 13. Main parts such as the movable terminal 15 are assembled and adjusted for each phase and then attached to the insulating mold case 8, so a box-shaped insulating frame with only about one side open is partitioned so that each phase is electrically independent. This configuration does not increase the number of man-hours for assembly and adjustment even if it is housed in the 8.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

1) Since the auxiliary contactor 11 is arranged and configured in front of the vacuum contactor, periodic inspection is facilitated, and wiring work when the high-voltage starter is housed in a cubicle is simplified, reducing the number of man-hours.

2) Since there are no restrictions on the installation space for the auxiliary contactor 11, it is now possible to install unit type auxiliary contactors in parallel, and it is now possible to easily meet the demand for an increase in the number of auxiliary contacts, allowing them to be stored in a cubicle and controlled. User-friendliness has been improved, such as no longer having to worry about the number of auxiliary contacts when designing a circuit.

3) The main circuit parts to which high voltage is applied, such as the vacuum switch 1, are isolated by an insulating frame made of a solid insulator, and the high voltage part and the low voltage part are completely separated, improving safety.

[Brief Description of the Drawings] Fig. 1 is a front view showing an embodiment of the vacuum contactor of the present invention, Fig. 2 is a side view of the main part of the A-A cross section in Fig. 1, and Fig. 3 is a conventional vacuum contactor. FIG. 4 is a front view of the vacuum contactor, and FIG. 4 is a side view showing the auxiliary contactor portion of the conventional vacuum contactor. 1... Vacuum switch, 3... Vacuum switch operating lever 6... Operating electromagnet, 8... H! ! Edge free frame 1...Unit type auxiliary contactor, 16...Auxiliary contactor operation lever. Agent #t! d″゛4′+sgz 1st (2) l・・vacuum・nu, ikka 3−・・・R+1 Lever S゛Blue permission shift-mu ll−persimmon゛period Keyaki touch, whisper 2 figures and a half 3 figures

Claims (1)

[Claims] 1. House the vacuum valve in the insulating frame, extend the rod from the electrode inside the vacuum valve to the outside, install the insulating rod on one rod, and rotate the operating lever provided on the insulating rod to operate the insulating rod. A vacuum contactor in which an auxiliary switch that operates in the same way as the electrode is provided on one side via an insulating frame in response to rotation of an operating lever in the direction of contact and separation.