SU1520605A1 - Disconnector of explosion-proof electric distributor - Google Patents

Abstract

The invention relates to the field of electrical engineering, specifically to explosion-proof electrical switchgear operating in explosive environments. The purpose of the invention is to increase the reliability and ensure the alternation of phases in the output contacts of an explosion-proof disconnector. The disconnector of an explosion-proof electrical switchgear contains phase contact systems consisting of movable, lead-in and lead fixed contacts. The body is made of two parts, one of which has input fixed contacts, the other - output fixed contacts. Both parts are fastened together to form an explosion-proof cavity, in which a shaft with moving contacts and a shaft drive are installed. The contact system of each phase disconnector is made in a separate explosion-proof cavity. In addition, each contact system of the two explosion-proof cavities is provided with an additional lead-out contact, each of which is galvanically connected to the adjacent lead-out contact of said cavity. 9 il.

Description

The invention relates to electrical engineering, in particular to low-voltage disconnectors for explosion-proof switchgears.

The purpose of the invention is to increase the reliability and ensure the alternation of phases in the output contacts.

FIG. L shows an isolator for an explosion-proof electrical switchgear; figure 2 - section aa on figl; in Fig. 3 - a section B-B in Fig. 1; in fig. 4 and 5 are sections B-B in Fig. 2, embodiments of a disconnector by contact systems located in the explosion-protected cavities; on - 8 - sections A-A, G-D, D-D in Fig. 1, respectively, an embodiment of the disconnector with phase alternation in high-speed contacts; in FIG. 9, view E in FIG. 7, the connection of additional output contacts with adjacent output contacts of explosion-proof cavities is shown.

The disconnector of an explosion-proof electrical switchgear comprises a housing consisting of two parts 1 and 2 (Figures 1 and 2),

pressed out of electrically insulating material with fixed fixed contacts 3 installed and fixed fixed contacts 4, shaft 5, nozzles movable contacts 6, shaft drive 7. Shaft drive 7 is articulated with shaft 5 by means of slot-grooves and can be installed with front side disconnectors depending on the place of its installation in the device. The parts of housing 1 and 2 are interconnected with each other by means of bolting 8 "At the interfaces between the housing elements and the shaft and the shaft drive, explosive-permeable gaps 9 are provided with the formation of an explosion-proof cavity.

In order to increase the electrical strength between the poles and ensure the reliability of the disconnector, the explosion-proof cavity is divided by electrically insulating partitions 10 (FIG. 4) into separate explosion-proof cavities 11–13. Electrolytic partitions are pressed in one piece with housing parts J and 2 “In each explosion-proof cavity, a contact system of the disconnector phase is installed. This eliminates the possibility of phase-to-phase short circuit in the event of possible damage (breakdown of the disconnector shaft), and also reduces the tnost lesions of attendants of electrocution

The disconnector of the proposed device can be made reversible, that is, with the possibility of phase alternation in the output contacts. For this, the contact systems of the two explosion-proof cavities are equipped with additional output contacts.

14 and 15 °. In this case, additional output contacts are galvanically connected to the output contacts of adjacent mentioned cavities,. additional output contacts 14 and 15 are connected to the output contacts 16 and 17, respectively (Fig.7 and 8) with jumpers 18 and 19

When a shutdown command is given, the drive, rotating the shaft 7, transfers contacts 6 to the open state. The contact closure is performed in the same way.

Claims (1)

Invention Formula I Disconnector of an explosion-proof electrical switchgear containing phase contact systems consisting of moving, input and output fixed contacts, a housing made of two parts, one of which has input fixed contacts, the other fixed contacts, both of which are fastened between themselves with the formation of an explosion-protected cavity in which a shaft with moving contacts is installed, a Bajia actuator, characterized in that, in order to increase reliability and ensure rotation No phases in the output contacts, the case is equipped with partitions arranged so that the contact system of each phase of the disconnector is made in a separate explosion-proof cavity, as the contact system of two explosion-proof cavities is equipped with an additional output contact, each of which is galvanically connected to the adjacent output contact POST R g , PD 4- - C) ig.1 srig.2 L . I l R 6-6 srig.Z // a4 s 3 FIG. Yr Fig.b L l 17 Physical 5 FIG. 9 Editor A. Motyl Compiled by Yu „Be the coven Tehred L. Serdyukova Proofreader N “King” Order 6765/54 Circulation 696 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin 101 Subscription