JPS6244924A - Highly pressure resistant lead relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a high voltage reed relay, particularly for use in a power system where the applied voltage during normal operation and the applied voltage during abnormality fluctuate widely. The present invention relates to a suitable high voltage reed relay device.

[Background of the invention]

As shown in FIG. 6, the conventional high voltage reed relay device, which operates at high voltage and at high speed and has a commonly used structure, has a reed switch 5 installed directly in the hollow part of the coil winding frame 1. Insulation deterioration over time due to partial discharge (corona) caused by a 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 electrode 14 of the reed switch 5 and the winding 2 of the coil 3. Because there is insufficient structural creepage distance between the two, no consideration was given to insulation strength, lifespan under normal use, and overload resistance, such as dielectric breakdown when overvoltage is applied. this is,
The reed switch 5 has a structure that makes it difficult to increase the withstand voltage, and its withstand capacity is limited by the contact gap and its encapsulation method, and since conventional products were mainly used for electronic equipment, it is difficult to make the reed switch 5 have a high withstand voltage. It was insufficient compared to its strength.

The present invention aims to utilize the high-speed operation performance of reed relays and the current withstand voltage capability of reed switches, and to obtain a device that can be applied to power equipment by reinforcing insulation and coordinating insulation. Note that, as a document related to the structure of a conventional reed relay, there is, for example, Knowledge of Reed Switches (published by Nippon Hamlin Co., Ltd.).

[Purpose of the invention]

The purpose of the present invention is to perform high-speed switching operation via high impedance from the high-voltage circuit of the power system, so that insulation breakdown does not occur even if overvoltage is temporarily applied in the event of an abnormality in the power system, and even when a constant voltage is applied for a long period of time. Another object of the present invention is to provide a high voltage reed relay device for power use that does not cause insulation deterioration.

[Summary of the invention]

In order to apply the high-speed operation performance of reed switches to high-voltage circuits of power equipment, the present invention integrates a high-voltage reed relay with improved insulation between the drive coil and the reed switch, and a discharge gap in parallel. Insulation characteristics of reed switch contacts (characteristics that indicate the relationship between discharge voltage value and voltage application time, hereinafter referred to as v- characteristics)
As shown in Fig. 5, the reed switch contact 13 and the discharge gap 8 are arranged in parallel with each other in parallel with the reed switch contact 13 and the discharge gap 8, as shown in Figure 5. This high-voltage reed is configured to discharge at a high voltage, and covers the surge resistance by strengthening the insulation of the dielectric strength and corona-resistant surface, and the insulation coordination, so that the reed switch 5 for electronic equipment can be applied to power equipment. It is a relay device.

[Embodiments of the invention]

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

A high voltage reed relay 6 is constructed of a coil 3 in which a winding 2 is wound around a winding frame L, a reed switch 5 with fixed bushings 4 provided at both ends, and a discharge electrode 7 facing each other with an air gap. The discharge gap 8 is arranged side by side on the insulating base 9 and integrated, and the reed switch 5 and the discharge gap 8 are connected to the terminal plate 15.
are connected in parallel. In addition, among the configured high voltage reed relay devices, the high voltage reed relay 6 has a winding frame l provided with a winding 11 at both ends of a hollow body lO and a barrier wall 12 extending the body in the direction of both ends, and a reed contact. A reed switch 5, which has an external electrode 14 on both ends, is sealed and sealed, and the reed switch 5 is placed in the hollow part of the body of the winding frame 1, with an equal gap between the body and the reed switch, and both ends of the reed switch 5 are wound. It consists of a fixed bushing 4 that is supported and fixed to the frame 1.

In this high voltage reed relay device, the high voltage reed relay 6 mechanically protects the reed switch 5 by providing a barrier wall 12 on the winding frame 1, and also provides a sufficient insulation distance between the winding 2 and the external electrode 14. can be achieved, resulting in high voltage resistance.

In addition, by mounting the reed switch 5 in the hollow part of the winding frame 1 with a gap, the electric field between the reed switch 5 and the winding 2, especially the concentrated electric field at the reed contact 13, can be alleviated.
Partial discharge (corona) between the winding frame l and the reed switch 5 can be suppressed. Further, by molding the winding frame 1 from an insulating inorganic material such as porcelain or glass, it is possible to eliminate insulation deterioration of the winding frame 1 over time due to corona discharge.

Furthermore, by constructing the fixed bushing 4 of the reed switch 5 with an elastic insulator made of rubber or plastic, even if a certain amount of external force is applied to the external electrode 14, its elasticity can absorb damage to the reed switch 5. I can do it.

For the high voltage reed relay 6 with reinforced insulation, the v- characteristics of the reed switch 5 are known in advance, and the v-
As shown in FIG. 5, by providing a discharge gap 8 in parallel with the reed contact 13, which has the characteristic of discharging below the withstand voltage limit of the reed switch 5, lightning surges or switching surges can be prevented. Even if an impulsive external surge of extremely high voltage is applied to the reed contact 13, the discharge gap 8 performs a preliminary discharge at a value below the withstand voltage limit of the reed contact 13, and absorbs the surge energy. Mechanically protecting the reed switch 5 by the barrier wall 12 and reinforcing the insulation between the winding 2 and the electrode 14;
A gap is provided between the winding frame 1 and the reed switch 5 to alleviate the electric field, the winding frame 1 is made of porcelain to eliminate insulation deterioration, and the fixed bushing 4 reduces shock to the reed switch 5. , the insulation coordination between the reed contact 13 and the discharge gap 8 handles external surges, etc. By serving as mechanical protection for the reed switch 5, reinforcing the insulation, and achieving insulation coordination, the reed relay is applied to high-voltage power equipment. I made it possible.

〔Effect of the invention〕

According to the present invention, mechanical speed switching of a high voltage circuit can be performed by insulation cooperation between a high voltage IJ-dry relay using a conventional high voltage reed switch and a discharge gap, and insulation resistance and long life can be obtained. Reed relays can be applied to power equipment.

[Brief explanation of drawings]

Fig. 1 is a central cross-sectional view of the high voltage reed relay of the present invention and is a structural explanatory diagram of one embodiment, Fig. 2 is a front view of the high voltage reed relay device of the invention, and Fig. 3 is the right side of Fig. 2. Figure 4 is a sectional view taken along arrows -■ in Figure 2, Figure 5 is a characteristic diagram of v- for explaining the insulation cooperation between the reed switch of the present invention and the discharge gap, and Figure 6 is a conventional reed switch. FIG. 3 is a central sectional view of the relay. 1... Winding frame, 2... Winding wire, 3... Coil, 4...
・Fixed bushing, 5... Reed switch, 6... High voltage reed relay, 10... Body, 11... Wrapping, 1
2... Barrier wall, 13... Lead contact, 14...
external electrode.

Claims (1)

[Claims] 1. A reed relay in which a reed switch is provided in the center of the magnetic field of a coil and the coil is excited, and the generated magnetic field attracts the electrode of the reed switch and closes the contact, which has a high withstand voltage. A high-voltage reed relay and a discharge gap made up of a coil and the reed switch are integrated on an insulating base, and the contacts of the high-voltage reed relay and the discharge gap are combined in parallel, and when an impulse voltage is applied to the contacts,
A high withstand voltage reed relay device, characterized in that the reed relay is applied to high withstand voltage power equipment by performing optical discharge when the discharge gap is below a withstand voltage limit expressed by the insulation properties of the contacts and consuming impulse energy. 2. In claim 1, the high voltage reed relay includes the reed switch, a fixed bush, a winding frame, and a winding, and the reed switch is disposed in a hollow body space of the winding. By supporting and mounting the reed switch with fixed bushings at both ends, a gap is created between the inner surface of the body and the outer circumferential surface of the reed switch, and the electric field between the high voltage reed relay and the winding is alleviated. A high-voltage reed relay device characterized by a barrier wall provided at the rim. 3. The high voltage reed relay device according to claim 2, wherein the winding frame is made of porcelain or glass. 4. The high voltage reed relay device according to claim 2, wherein the fixing bush is made of rubber or plastic.