JPH0138336B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disconnector in which a blade that makes opening/closing contact operates linearly with respect to other parts.

A conventional disconnector is shown in Figures 1a and b.

a is a manual disconnector. In the figure, 1 is a blade, and 1a is a hook portion, which rotates around a rotating terminal 2 as a fulcrum. 3 is an insulator, 4 is a contact terminal attached to this insulator 3, 5 is a contact portion, and 6 is a base.

b indicates an electric disconnector, and 7 is an electric motor connected to a drive mechanism 8 to rotate the blade 1.

Next, the operation will be explained.

In both manual and electric type disconnectors, a blade 1 rotates around a rotating terminal 2 as a fulcrum to open and close a circuit.

In the manual type, the disconnector is opened and closed using a hook rod, and in the electric type, the rotational movement of the electric motor 7 is used to open and close the disconnector.

Since conventional disconnectors have rotating terminals, the range of rotation radius increases the installation space. Furthermore, in the case of an electrically operated type, the space for installing the motor is extremely large, which has the disadvantage that the space factor is not good when storing a cubicle, for example.

This invention was made in order to eliminate the drawbacks of the conventional disconnectors as described above, and aims to provide a disconnector with a good space factor by changing the opening/closing operation of the circuit from a rotational motion to a linear motion. The purpose is

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

In FIG. 2, 21 is an electromagnetic coil, 22 is a linear motor, 23 is an operating rod, and 24 is an insulator 3.
The blade 1 is a hollow conductive part fixed to the
Move while touching the inside. 25 is an insulating section.

Next, the operation will be explained based on the drawings.

In FIG. 2, an operating rod 23 moves left and right using an electromagnetic coil 21 and a linear motor 22 as power to open and close the circuit. A is a closed state, and b is an open state.

FIG. 3 shows the stroke-torque characteristics of the electromagnetic coil and the linear motor. Here, the stroke refers to the contacting blade 1 as shown in Fig. 2b.
is the distance between.

When the stroke is short, the operating rod 23 is moved quickly by the electromagnetic coil 21 with a large torque, and after the stroke is long and becomes lo, the linear motor 2 is moved quickly.
2 to operate the operating rod 23 smoothly.

In the above embodiments, a single-pole case has been described, but it goes without saying that the present invention can also be applied to a multi-polar case.

As described above, according to the present invention, the blade can be opened and closed using an electromagnetic coil and a linear motor, so when the blade has a short distance to move, the electromagnetic coil can quickly open and close the blade. When the distance exceeds a predetermined value, a linear motor can be used to move at any speed and stroke depending on the application, and the speed and torque when opening and closing can be electrically controlled. This reduces the impact when opening and closing the pole, and further improves the space factor. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional disconnect switch, in which a shows a manual disconnect switch and b shows an electric disconnect switch. FIG. 2 is a side view of a linear disconnector according to an embodiment of the present invention, in which a is a closed state and b is an open state. Third
The figure is a graph showing the characteristics of an electromagnetic coil and a linear motor, which are the principles of this invention. In the figure, 1 is a blade, 21 is an electromagnetic coil, 22 is a linear motor, and 23 is an operating rod. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1 A blade that opens and closes, an electromagnetic coil that opens and closes when the blade travels a short distance, and a linear linear coil that is installed in parallel with this electromagnetic coil and opens and closes when the blade travels a predetermined distance or more. A linear motor-type disconnector comprising a motor, and an operation rod that extends through the electromagnetic coil and the linear motor, which are connected in series so as to open and close the blade, and which are arranged in parallel.