JPS61267209A - Triple type circuit breaker - 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 The present invention comprises an identification contact formed in a spherical shape and a movable contact rotatable around a fixed shaft, the movable contacts being provided parallel to each other and having at least one contactor having a holding force. The clamping relates to a royal disconnector formed by two disconnector knives plated by a member.

A disconnector of this type is known, for example, from Swiss Patent No. 441466
It is known from No. This known disconnector has a rotating double disconnection knife around a fixed shaft, which in the closing position surrounds a fixed contact of spherical design from the outside. In this disconnector, the double disconnection knife is spread out by means of a wedge during the switching process, thereby making possible reliable switching with minimal drive torques.

The invention, as characterized in the claims, solves the problem of providing a disconnector of the type mentioned at the outset, which ensures reliable switching in a simple manner.

This task consists of supporting and contacting a spherical contact, which is fitted on the opposite sides of the disconnection knife with one in each case of two stepped bearings, which are penetrated centrally by the fixed shaft (2). and having contact surfaces adapted to the surface of the spherical contact and each configured as a spherical zone and a recess leading into said contact surface for accommodating a central pin mounted on the spherical contact. . The disconnector according to the invention is characterized by an extremely cost-effective combination of optimum current conduction.

Its method of operation is guaranteed even outside the tolerance limits limited to the manufacture and assembly of comparable disconnectors.

Preferred embodiments of the invention are indicated in the dependent claims 2 to 7.

The disconnector shown in FIG. 1 and preferably provided for switching medium pressure has a fixed contact I shown in dotted lines and a movable contact 3 rotatable around a fixed shaft 2. Although the fixed contact 1 is directly conductively connected to the current terminal 4, the movable contact 3 is connected to the ``fixed spherical contact part 5''.
and a current terminal 7, ! via a contact support 6 holding a spherical contact 5! :7 conductive connections.

An operating rod 8 made of an insulating material is centrally mounted on the movable contact 3, and this rod itself is rotatably mounted on the rank clamper A 9 about a fixed axis IO.

When the crank arm 9 is rotated counterclockwise, as shown by the arrow in FIG. is guided to the disconnection position A of the disconnector, and is then eventually grounded at the grounding position G by contact with the grounding contact 11.

Fixed contact I, movable contact 3 and spherical contact part 5
The structure of is indicated in FIGS. 2-4. It can be seen from these drawings that the fixed contact 1 is of spherical construction and has a contact surface oriented in the direction of movement of the movable contact 3.

The movable contact 3 is configured as a double knife and includes two disconnection knives 12, [3.

The isolating knife 12.13 has a resilient clamping member 14 mounted approximately equally wide from the end of the isolating knife 12.13.
are pressed together and brought together. Tighten with member 14
is a screw 16 passed approximately parallel to the axis 2 and tightened by a nut 15 and two compression springs preloaded by the screw 16 and the nut 1(6.)5 and supported by the disconnection knife I2 or 13. Contains 17 yo or 18. These compression springs each have a disconnection knife 12
．． Two material recesses 19.20 that fit into the outside of 13
It is attached with. The screw 16 is also used as a bearing for the actuating rod 8, which is supported between the two disconnecting knives 12, 13 in a rotating shaft.

On the mutually facing inner surfaces of the two disconnecting knives I2.13, in the area of the free end of the movable contact 3 remote from the sleeve 2, two projections 21 and 22 are provided, which projections
When the disconnector is opened, the tightening is caused by the movement of both disconnection knives 12.13 by member I4! (a) facing the tip, so that sufficient distance remains between the free ends of both knives, so that when closing this disconnector it is possible to securely ride on the fixed contact l'-. do it like this.

The spherical contact 5 has two contact parts 23, 24 which are on the surface of the sphere and are closed annularly, as well as a contact part 23 or 2.
It has two central pins 25 or 26 leading to one of the four. These central pins 25,26 extend in opposite directions along the axis 2 extending through the center of the sphere. The spherical contact 5 is supported by two stepped bearings, which are fitted into each one of the mutually opposite inner surfaces of both disconnecting knives 12.13.

In FIG. 3 one of these stepped bearings is shown enlarged. The stepped bearing shown has a contact part 27 adapted to the contact surface 24 of the spherical contact part 5 to support the contact part and configured as a spherical zone, as well as a cylindrical recess 24 following the narrow edge of this contact part 27. Hold it, and this recess is the center pin 2.
It is used to accommodate 6. Both disconnection knives 12 and 13 are connected to shaft 2
(solid axis 2), center pin 26
are obviously only slightly separated from the boundaries of the recess 28 on all sides, so that the rotation of the shaft 2 and therefore the two disconnecting knives 12.
The swing on the total loose side of 13 is 2.3 from the centering position.
An angle α in degrees is possible (dotted axis 2).

During the switching process, the two central pins 25.26 are used, on the one hand, to enable a reliable rotation of the two disconnecting knives 12.13 during switching and, on the other hand, possibly from stepped bearings that are inserted into the disconnecting knives 12.13. This prevents the spherical contact portion 5 from slipping off. If the two disconnecting knives 12.13 are placed on the fixed contact l (FIG. 4) during switching on or on the grounding contact 11 during grounding, the double disconnecting knives 12.13 can be swung by an angle α. The support of 13 always allows line contact between fixed contact I and disconnection knife 2 and 13, independent of assembly and manufacturing tolerances of the contacts. Therefore, the disconnection knife 12, 13 can be produced as an inexpensive pressed body. The contact force necessary for conducting the current from the fixed contact 1 to the disconnection knife 12.13 or from the disconnection knife 12.13 to the spherical contact 5, in this case the elastic clamping, is generated by the element I4.

[Brief explanation of the drawing]

1 is a front view of a disconnector according to the present invention, FIG. 2 is a sectional view taken along the line n-TI through the disconnection diagram according to FIG. 1, FIG. 3 is a partial sectional view from FIG. 2, and FIG. The figure is a sectional view taken along the line IV--IV through the disconnector according to FIG. 1. 1... Fixed contact 2... Shaft 3... Movable contact 5... Spherical contact portion 12.13
... Disconnection knife 26 ... Center pin 27 ... Contact surface 28 ... Recessed part

Claims (1)

[Claims] 1) A rotary movable contact (3) is provided around a spherical fixed contact (1) and a fixed shaft (2), and the movable contacts are provided and held in parallel to each other. In a three-position disconnector formed by two disconnection knives (12, 13) clamped by at least one clamping member (14) with force, two In each case one of the stepped bearings is fitted, which bearings are used for supporting and contacting the spherical contact part (5) which is penetrated centrally by the fixed shaft (2) and to the surface of the spherical contact part (5). It has contact surfaces (27) adapted and each configured as a spherical zone, as well as a recess (28) leading into said contact surface (27) for accommodating a central pin (26) mounted on a spherical contact (5). A three-position disconnector characterized by: 2) Claim characterized in that the central pin (26) is of approximately cylindrical construction and is separated from the boundaries of the recess (28) on all sides when centering the disconnection knife (12, 13) A three-position disconnector according to item 1. 3) The tightening member (14) is formed by a screw (16) passed approximately parallel to the fixed shaft (2) and two compression springs (17, 18) tightened by the screw (16). A three-position disconnector according to claim 1 or 2. 4) Both compression springs (17, 18) are each mounted in one of the two material recesses (17, 18) on both outer sides of the disconnection knife (12, 13), which recesses are spaced apart from each other. The three-position disconnector according to claim 3, wherein the three-position disconnector is fitted on one side. 5) A three-position disconnector according to claim 3 or 4, characterized in that the screw (16) is a bearing part of an operating rod (8) of a driving part of the movable contact (3). 6) The two disconnection knives (12, 13) are provided with projections (21, 22) on the inside facing each other, which projections contact each other in the disconnection position (A) of this disconnector. A three-position disconnector according to any one of claims 1 to 5, characterized in that: