JPH0736314B2 - High pressure resistance reel device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high breakdown voltage reed relay, and in particular, for use in a power system in which a steady state applied voltage and an abnormal state applied voltage fluctuate widely. The present invention relates to a suitable high voltage reed relay device.

[Background of the Invention]

As shown in FIG. 6, a conventional high withstand voltage reed relay device having a structure that is generally used and has a high withstand voltage and a high speed is a device in which the reed switch 5 is directly installed in the hollow portion of the coil winding frame 1. Insulation deterioration over time due to partial discharge (corona) caused by the concentrated electric field at the contact point at the interface between the sealed tube of the reed switch 5 and the winding frame made of organic material, and the winding of the electrode 14 of the reed switch 5 and the coil 3 Due to the fact that the creepage distance between the wires 2 cannot be sufficiently secured structurally, no consideration was given to the insulation strength, such as dielectric breakdown, in terms of the life under steady use conditions and the withstand capacity during overload. This is because it is difficult for the lead switch 5 to have a high breakdown voltage structurally, and its withstand capacity is limited by the contact gap and its encapsulation method, and the conventional products are mainly used for electronic devices. The insulation strength was insufficient compared to the insulation strength required for electric power equipment.
The present invention intends to obtain a device applicable to electric power equipment by directly utilizing the high-speed operation performance of the reed relay and the current withstand voltage capability of the reed switch, and by strengthening and coordinating the insulation. As a document related to the structure of the conventional reed relay, for example, there is knowledge of reed switch (published by Nippon Hamlin Co., Ltd.).

[Object of the Invention]

An object of the present invention is to perform a high-speed switching operation through a higher impedance than a high voltage circuit of a power system without causing dielectric breakdown even when an overvoltage is temporarily applied when the system is abnormal, and in long-term voltage application of a steady voltage. Another object of the present invention is to provide a high withstand voltage reed relay device for electric power that does not cause insulation deterioration.

[Outline of Invention]

In order to apply the high speed operation performance of the reed switch to the high voltage circuit of the electric power equipment, the present invention provides a high withstand voltage reed relay and an electric discharge gear which are arranged in parallel between the drive coil and the reed switch to improve the insulation. Insulation characteristics of the reed switch contact, which was confirmed in advance by the device (a characteristic showing the relationship between the discharge voltage value and the voltage application time, referred to as vt characteristic below)
As shown in Fig. 5, the reed switch contacts 13 and the discharge gears 8 are provided in parallel with each other so that the vt characteristics of the discharge gears and the discharge gears are coordinated. Configured to discharge at
This is a high withstand voltage reed relay device in which the reed switch 5 for electronic equipment can be applied to electric power equipment by covering the surge resistant surface by the insulation strengthening of the withstand voltage and corona resistant surface and the insulation cooperation.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

A high withstand voltage reed relay 6 composed of a coil 3 having a winding 2 wound around a winding frame 1, a reed switch 5 having fixed bushes 4 at both ends thereof, and a discharge pole 7 facing each other with a gap. The discharge gears 8 are arranged side by side on the insulating base 9 (may be arranged back to back on both sides of the base), and the lead switch 5 and the discharge gears 8 are connected in parallel by the terminal plate 15. In the constructed high-voltage reed relay device, the high-voltage reed relay 6 is wound around both ends of the hollow barrel 10.
A bobbin 1 provided with a barrier wall 12 which is formed by extending a body 11 and both ends of the body 11 toward both ends.
And the lead contacts 13 are hermetically sealed and the external electrodes 14
The lead switch 5 is attached to the reel switch 5, and the lead switch 5 is provided in the hollow portion of the reel 1 with a uniform gap between the body and the lead switch, and both ends of the lead switch 5 are fixed and supported on the reel 1. is doing.

In this high withstand voltage reed relay device, the high withstand voltage reed relay 6 mechanically protects the reed switch 5 by providing the barrier wall 12 on the winding frame 1 and ensures a sufficient insulation distance between the winding 2 and the external electrode 14. It can be provided and a high withstand voltage can be obtained. Further, by mounting the lead switch 5 in the hollow portion of the winding frame 1 with a gap, the electric field between the lead switch 5 and the winding 2, especially the concentrated electric field of the lead contact 13, is relaxed, and Partial discharge (corona) between the lead switches 5 can be suppressed. Further, by forming the reel 1 from a porcelain or glass made of an insulating inorganic material, it is possible to eliminate deterioration of the insulation of the reel 1 due to corona discharge over time.

Further, since the fixing bush 4 of the lead switch 5 is made of rubber or a plastic elastic insulating material, even if an external force is applied to the external electrode 14 to some extent, the elasticity of the lead switch 5 causes damage to the lead switch 5. Can be absorbed.

For the high breakdown voltage reed relay 6 designed for enhanced insulation, the v-t characteristics of the reed switch 5 are grasped in advance, and the v-
As shown in FIG. 5 with respect to the t characteristic, by providing a discharge gear 8 having a v-t characteristic that discharges below the withstand voltage limit of the lead switch 5 in parallel with the lead contact 13,
Even if an impulsive external surge of extremely high voltage, such as lightning surge or switching surge, is applied to the lead contact 13, the discharge gear 8 pre-discharges below the withstand voltage limit of the lead contact 13 and absorbs the surge energy. In the device configured as described above, the barrier wall 12 mechanically protects the lead switch 5 and strengthens the insulation between the winding 2 and the electrode 14, and a gap is provided between the winding frame 1 and the lead switch 5. To reduce the deterioration of insulation by making the bobbin 1 porcelain by porcelain, and to reduce the shock to the lead switch 5 with the fixed bush 4, and the insulation coordination between the lead contact 13 and the discharge gear 8 to prevent external surges. The reed relay can be applied to high-voltage power equipment by strengthening the insulation and coordinating the insulation while also mechanically protecting the reed switch 5.

〔The invention's effect〕

According to the present invention, by the insulation cooperation of the high-voltage reed relay and the discharge gear using the conventional high-voltage reed switch,
High-speed mechanical switching of the high-voltage circuit is possible, withstand capacity on the insulating surface and long life are obtained, and the reed relay can be applied to power equipment.

[Brief description of drawings]

FIG. 1 is a central sectional view of a high withstand voltage reed relay of the present invention, which is a structural explanatory view of one embodiment, FIG. 2 is a front view of a high withstand voltage reed relay device according to the present invention, and FIG. 3 is a right side surface of FIG. FIG. 4 is a sectional view taken along the line AA in FIG. 2, FIG. 5 is a vt characteristic diagram for explaining the insulation coordination of the lead switch and the discharge gear of the present invention, and FIG. 6 is a conventional lead. It is a center sectional view of a relay. 1 ... Reel, 2 ... Winding, 3 ... Coil, 4 ... Fixed bush, 5 ... Reed switch, 6 ... High-voltage reed relay, 10 ... Trunk, 11 ... Winding collar, 12 ... … Barrier wall, 13 ……
Lead contact, 14 ... External electrode.

Claims (1)

[Claims] 1. A reed switch, and a reel for forming a coil for driving the reed switch in a space surrounded by an outer wall of a hollow cylindrical body and a collar provided in the middle of the outer wall.
A high withstand voltage reed relay device in which the reed switch is fixed to the hollow part of the reel with a fixed bush, and a discharge gap for absorbing surge is provided in parallel with the reed switch, wherein a barrel of the reel is fixed to the fixed bush. High withstand voltage reed relay device characterized by protruding to the outside.