JPH0516771B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a three-phase solid state relay (hereinafter referred to as three-phase
In particular, the present invention relates to improvements in the structure of the control input display device for the SSR (hereinafter referred to as SSR).

[Conventional technology]

Conventionally, a control input display device for indicating that a control signal of a solid-state relay is being input has generally been used to indicate that a control signal of a solid-state relay is being input, as described in Japanese Utility Model Application No. 60-50539. It was housed in the case along with the semiconductor main element circuits that made up the solid-state relay and the control circuits that turned on and off these semiconductor main element circuits. However, solid-state relays are sometimes used in equipment that is completely maintenance-free, or in locations within equipment where the solid-state relay itself cannot be visually confirmed. If the control signal input display device is completely incorporated into the solid state relay body at the manufacturing stage, the control input display device becomes wasted and the manufacturing cost increases accordingly.

Therefore, FIG. 3 is a top view showing the configuration of a conventional three-phase SSR obtained in consideration of these points.
In the diagram, 300 is 3-phase SSR, 100 is 3-phase
SSR body, 1 is a control terminal, 2 is a connection line, 50 is a control input display device, 3 is an input terminal, 4 is an indicator light, 5
is the control power supply.

In this conventional 3-phase SSR 300, the control input display device 50 is installed so that it is connected between the 3-phase SSR main body 100 and the control power source 5 via the connection line 2, and the control input display device 50 is installed as necessary. Accordingly, this control input display device 50 is configured to be detachable. When the control input display device 50 is in use, when the input from the control power supply 5 is input to the control terminal 1, the indicator light 4 provided on the top surface of the control input display device 50
lights up to indicate that control input is being input to the 3-phase SSR100 main unit.

[Problem to be solved by the invention]

In the conventional three-phase SSR 300 shown in FIG. 3 above, the control input display device 50 is connected to the three-phase SSR body 100.
Since the control input display device 50 is installed separately from the 3-phase SSR main body 100, it is possible to attach and detach it from the 3-phase SSR main body 100 as needed.
Since the control terminal 1 of the control input display device 50 is connected to the input terminal 3 of the control input display device 50 by the connecting wire 2, the installation work is troublesome, and it is difficult to connect the connecting wire accurately by hand. Therefore, the user cannot easily and precisely attach and detach the control input display device to the three-phase SSR main body 100 depending on the intended use.

The present invention has been made to solve the above-mentioned problems, and provides a 3-phase SSR that allows the user to easily and accurately attach and detach the control input display device 50 to the 3-phase SSR main body 100 as required. The purpose is to obtain.

[Means to solve the problem]

The 3-phase SSR according to the present invention includes a protrusion that fits into a notch formed in the cover of the 3-phase SSR main body on the case of the control input display device, and a state in which the protrusion is inserted into the notch. An input terminal is provided that overlaps the control terminal of the three-phase SSR, and the input terminal is configured to be connected to the control terminal with a terminal screw that connects the control signal connection lead of the control power supply to the control terminal. It is.

[Effect]

In the present invention, the control input display device can be input to the 3-phase SSR main body by inserting the protrusion provided on the case into the notch formed in the cover of the 3-phase SSR main body. The display device has been positioned, and in this state, the input terminal of the control input display device that overlaps the control terminal of the 3-phase SSR is connected to the terminal screw that connects the control signal connection lead from the control power supply to this control terminal. Since the control input display device can be connected to the 3-phase SSR body easily and accurately when the user uses the solid state relay, the control input display device can be easily and accurately connected to the 3-phase SSR body as needed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a three-phase SSR according to an embodiment of the present invention. In the figure, the same symbols as in FIG. 3 indicate the same or corresponding parts, 51 is a control input display device, 6 is a case , 6a is a protrusion,
7 is a cover, and 7a is a notch.

In addition, FIG. 2 shows a three-phase SSR 20 with a control input display device 51 attached to the three-phase SSR main body 100.
FIG.

This 3-phase SSR 200 has a notch 7a formed in the cover 7 of the 3-phase SSR main body 100, and a protrusion 6a provided in the case 6 of the control input display device 51.
is inserted into the notch 7a of this cover 7,
Control input display device 5 for 3-phase SSR main body 100
1 is positioned, and the input terminal 3 of the control input display device 51 overlaps the control terminal 1 of the three-phase SSR main body 100, and the two are connected by tightening the terminal screw 1.

Next, the operation will be explained.

By connecting a control signal from a control power source (not shown) to the control terminal 1 of the 3-phase SSR main body 100, the indicator light 4 of the control input display device 51 lights up when a control input signal is input. Phase SSR
100 indicates that a control input signal is being input.

In the 3-phase SSR 200 of this embodiment, 3
The protrusion 6a provided on the case 6 of the control input display device 51 is inserted into the notch 7a formed in the cover 7 of the phase SSR main body 100, and the control input display device 51 is positioned. In this state, the input terminal 3 of the control input display device 51 overlaps the control terminal 1 of the 3-phase SSR main body 100,
Both are tightened with the terminal screws 1 and the control input display device 51 is attached to the 3-phase SSR main body 100, so when the user uses the solid state relay, the control input display device 51 can be attached to the 3-phase SSR main body 100 as necessary. phase
It can be easily attached and detached from the SSR body with high accuracy.

Although the above embodiment describes a control input display device for a three-phase SSR, a single-phase,
It goes without saying that the present invention can also be applied to a control input display device for a two-phase SSR or a multi-phase SSR of four or more phases.

〔Effect of the invention〕

As described above, according to the present invention, the case of the control input display device includes a protrusion that fits into the notch formed in the cover of the 3-phase SSR main body, and a protrusion that fits into the notch. In this state, an input terminal is provided that overlaps the control terminal of the three-phase SSR, and the input terminal is configured to be connected to the control terminal with a terminal screw that connects the control signal connection lead of the control power supply to the control terminal. Therefore, when a user uses a 3-phase SSR, the control input display device can be changed to a 3-phase SSR if necessary.
This has the effect of allowing easy and accurate attachment/detachment to the SSR body.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are 3 according to one embodiment of the present invention.
A perspective view of the phase SSR and a perspective view showing its installation state,
FIG. 3 is a wiring diagram showing the configuration of a conventional three-phase SSR. 1 is a control terminal, 2 is a connection line, 3 is an input terminal, 4
is an indicator light, 5 is a control power supply, 6 is a case, 6a is a projection, 7 is a cover, 7a is a notch, 50,5
1 is the control input display device, 100 is the 3-phase SSR main body,
200 and 300 are 3-phase SSR. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. Three semiconductor main element circuits for connecting and disconnecting the supply of three-phase AC power to a load, and a control circuit for controlling on/off of these semiconductor main element circuits, The solid state relay is housed in a solid state relay body in which a control terminal of the control circuit is formed in the part,
A three-phase solid in which the semiconductor main element circuit and the control circuit are shielded from the outside by a cover on which the power supply side main terminal and load side main terminal of the semiconductor main element circuit are formed on the outer periphery. The state relay is a state relay in which a protrusion provided on the case is inserted into a notch provided in the vicinity of the control terminal of the cover and positioned, and in this positioned state, the protrusion provided on the case is inserted into the lower end of the case. The formed input terminal is
The control is configured to overlap a control terminal formed on the side of the solid state relay main body, and the input terminal is fastened to the control terminal together with a control signal connection lead from the control power source by a terminal screw. 3, characterized in that a control input display device is provided to display that a control signal is input to the terminal.
phase solid state relay.