PL190402B1 - Contact and arc suppression assembly of a switch - Google Patents

Abstract

A connecting and extinguishing device for a connector, containing an insulating housing in the form of a pipe section, which contains a known vacuum chamber. The connecting mandrel of the fixed contact of the chamber is connected to the top lid, pushed into the insulating housing. The external walls of the housing are covered with an insulating shield with anti-soiling covers. It is characterised in that the guide (7) of the mandrel (8) of the connector drive is placed in the patent opening of the lower lid (6) pushed into the insulating housing (1). Between the lid (6) and the housing of the vacuum chamber (2), there is an elastic sealing ring (9). The free space between the vacuum chamber (2) housing and the internal walls of the insulating housing (1) and the lids (5, 6) is filled completely with an elastic insulating mass (10).

Description

The subject of the invention is a contact and extinguishing device of a switch equipped with a vacuum chamber.

The use of vacuum chambers as a contact and extinguishing device in electrical switches is known. Examples of solutions are presented, inter alia, in the US patent description US 3 626 123, in the European patent application EP 0525635 or in the Polish patent description PL 187 251. The use of vacuum chambers guarantees high durability and reliability of the connector, safe operation and protection of the natural environment.

A disadvantage of many known contact-extinguishing devices of switches equipped with vacuum chambers is the limitation of the use of the switch to closed rooms only. The above results from insufficient insulation of the vacuum chamber in the case of overhead operation, often in difficult weather conditions.

British Patent Specification No. GB 2,029,643 discloses a contact extinguishing device that is resistant to dirt and the influence of atmospheric humidity. The shown device has an insulating body in the form of a tubular section inside which a vacuum chamber is placed. The connecting pin of the fixed contact of the vacuum chamber is connected to the upper cover of the vacuum chamber. The outer walls of the vacuum chamber body are covered with an insulating cover with anti-dirt covers.

The contact and extinguishing device of the connector containing an insulating body in the form of a tubular section, inside which a known vacuum chamber is placed, the connecting pin of the fixed contact with the upper cover pressed into the body of the device, the outer walls of which are covered with an insulating cover with anti-contamination covers, according to the invention it is distinguished by in the through-hole of the lower cover, also pressed into the body of the device, a guide for the spindle of the drive of the fastener is provided, and an elastic sealing ring is placed between the cover and the housing of the chamber. The free space between the chamber casing and the internal walls of the body and covers of the device is completely filled with elastic insulating mass.

The subject of the invention in an exemplary embodiment is shown in the drawing, which shows the device in longitudinal section.

The device has an insulating body 1, in the form of a tubular section, inside which a known vacuum chamber 2 is placed. A sleeve 4 is screwed onto the threaded pin 3 of the contact of the stationary chamber 2, pressed into the opening of the cover 5, which is a connection plate, which in turn is pressed into device body 1. In the through-hole of the lower cover 6, also pressed into the body 1 of the device, there is a guide 190 402 for the spindle 8 of the connector drive, and between the cover 6 and the housing 2 of the chamber there is a flexible sealing ring 9. The free space between the housing of the chamber 2 and the internal the walls of the body 1 and the covers 5 and 6 is completely filled with an elastic insulating mass 10. In both covers 5 and 6 there are threaded through holes 11 and 12 for connecting the device with the current path of the switch and for mounting the drive-contact unit. The outer walls of the body 1 are covered with an insulating silicone cover with anti-pollution shades 13. The covers 5 and 6 are additionally connected to the body 1 by screws 14 and 15.

The device according to the invention can be used in medium and high voltage disconnectors, in alternating current earthing switches capable of switching induced currents in two-circuit transmission lines and for other applications. The device is resistant to rain, snow, frost and dust, it can also work in a chemically aggressive environment containing explosive or flammable gases, in a maritime and tropical climate.

190 402

Publishing Department of the UP RP. Circulation of 50 copies. Price PLN 2.00.

Claims (1)

Patent claim The contact and extinguishing device of the connector, containing an insulating body in the form of a tubular section, inside which a known vacuum chamber is placed, the connecting pin of the stationary contact is connected to the upper cover pressed into the insulating body, the outer walls of which are covered with an insulating cover with anti-contamination shades, characterized by that in the through-hole of the lower cover (6), pressed into the insulating body (1), there is a guide (7) of the connector drive spindle (8), with a flexible being placed between the cover (6) and the vacuum chamber housing (2), sealing ring (9), and the free space between the vacuum chamber casing (2) and the inner walls of the insulating body (1) and the covers (5, 6) is completely filled with elastic insulating mass (10).