Sliding contact device for contacting movable arc contact of vacuum switch

Abstract

The invention relates to a solution for a sliding contact arrangement for contacting a movable arc contact (6) of a vacuum switch under high-voltage conditions. The proposed solution is advantageously characterized by a small moving mass and a low contact resistance.

Description

Technical Field

[0001] The invention relates to the contact between an axially movable arc contact and a fixed hollow contact tube of a vacuum switch. Background Art

[0002] Until now, in vacuum switches, the contact between the movable arc contact and the fixed contact tube has been achieved via a clamped pipe connection, onto which a contact ring, which additionally contains the laminated strip contacts, is screwed. The large number of contact transitions caused by the construction leads to high contact resistances, which is detrimental to the thermal loadability of the vacuum switch. In addition, the large mass of such a construction must be accelerated to the required high contact speeds. This leads to an increased mechanical load on the kinematic chain; in addition, a correspondingly high drive energy is required.

[0003] In another known solution, conductor wires are used. Since higher contact speeds are required at high voltage levels (eg high voltage), this solution is also subject to high mechanical loads. Summary of the invention

[0004] The object of the present invention is to design the contact between a movable arc contact of a vacuum tube and a fixed contact tube of a vacuum switch in such a way that reliable contacting of the movable arc contact is achieved with a small moving mass and a low contact resistance.

[0005] The above-mentioned technical problem is solved by a sliding contact device for contacting a movable arc contact of a vacuum switch, comprising the features of claim 1 , claim 3 and claim 6 .

[0006] The proposed solution is advantageously characterized by a small moving mass and a low contact resistance.

[0007] Advantageous developments of the invention are specified in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Hereinafter, the present invention will be described in detail with reference to the drawings as embodiments within the scope necessary for understanding.

[0009] Here, in the accompanying drawings:

[0010] Figure 1 shows a first contact of an axially movable arc contact of a vacuum switch according to the present invention,

[0011] Figure 2 Shows Figure 1 The arrangement in the cross-section along section II-II,

[0012] Figure 3shows a second contact of an axially movable arc contact of a vacuum switch according to the present invention,

[0013] Figure 4 shows a third contact of an axially movable arc contact of a vacuum switch according to the invention, and

[0014] Figure 5 Shows Figure 4 The arrangement in is a cross-sectional view along section VV.

[0015] In the drawings, like reference numerals denote like elements. DETAILED DESCRIPTION

[0016] In accordance with Figure 1 In the embodiment of the present invention, conductive fins 10 (for example three fins) are arranged on the movable arc contact 6 of the vacuum tube 4, and these conductive fins 10 run in the corresponding contact slots of the mating contact. For example, the contact slots can be formed by two conductive webs 12 in the fixed hollow contact tube 5, and the two conductive webs 12 are provided with conductive laminated contacts 11 on the inner contact surface. Then, the arc current flows through the fins 10 of the movable arc contact 6 to the laminated contact 11 and then to the conductive webs of the fixed contact tube 5 (mating contact).

[0017] according to Figure 3 The embodiment of the embodiment shows a tubular contact piece 7 with elastic contact fingers 8. The contact piece coaxially surrounds the movable arc contact 6 of the vacuum tube and is galvanically fixedly connected to the fixed contact tube 5. The contact piece is preferably made of CuCr1Zr or carbon fiber reinforced carbon.

[0018] In accordance with Figure 4 In the exemplary embodiment of the present invention, the movable arc contact 6 of the vacuum tube 4 is electrically connected to the fixed contact tube 5 via a laminated contact strip 13. The laminated contact strip 13 is fixed in a ring and is connected to the fixed contact tube 5, for example, via a web or a shoulder. A sliding contact is provided between the laminated contact strip 13 and the movable arc contact 6. In this solution, the contact tube can be realized economically as a cast part in particular.

[0019] The movable arc contact 6 is driven and centered via the output element 3 .

[0020] The sliding contact device according to the invention can be designed for high voltages. High voltages in the sense of the invention are to be understood as voltages of 72.5 kV and above.

[0021] For the purpose of illustration, the present invention has been described in detail with reference to specific embodiments. Here, the elements of the various embodiments may also be combined with each other. Therefore, the present invention is not limited to the various embodiments, but is only limited by the appended claims.

[0022] Reference numerals list

[0023] 1Insulation shell

[0024] 2Fixed contact, first high voltage connector

[0025] 3. Driven parts and driving devices

[0026] 4 Vacuum switch tube

[0027] 5Fixed hollow contact tube, second high pressure connector

[0028] 6Axially movable arc contact of vacuum switch tube

[0029] 7 Tubular contact

[0030] 8 Elastic contact fingers

[0031] 9 Fixed arc contacts of vacuum switch tube

[0032] 10 Conductive fins

[0033] 11 Conductive stacked contacts

[0034] 12. Belly

[0035] 13 Laminated contact strip

[0036] Section II-II

[0037] VV Section

Claims

1. A sliding contact device for a movable arc contact of a contact vacuum switch, It is characterized in that An arc contact (6) movable along its longitudinal axis has a plurality of, in particular three, fins (10) arranged in an equidistant manner around its longitudinal axis, and The corresponding fin (10) acts together with the web (12) of the fixed mating contact (5) as a sliding contact.

2. The sliding contact device according to claim 1, It is characterized in that The web (12) is provided with laminated contacts (11).

3. A sliding contact device for a movable arc contact of a contact vacuum switch, It is characterized in that An arcing contact (6) movable along its longitudinal axis and a fixed mating contact (5) are provided, The tubular contact piece (7) is fixedly connected to the fixed mating contact (5) in an galvanic manner. The tubular contact piece (7) has spring contact fingers (8) which coaxially surround the movable arc contact (6), so that the tubular contact piece (7) and the movable arc contact (6) act together as a sliding contact.

4. The sliding contact device according to claim 3, It is characterized in that The tubular contact piece (7) is made of CuCr1Zr.

5. The sliding contact device according to claim 3, It is characterized in that The tubular contact element (7) is made of carbon fiber reinforced carbon.

6. A sliding contact device for a movable arc contact of a contact vacuum switch, It is characterized in that An arcing contact (6) movable along its longitudinal axis and a fixed mating contact (5) are provided, A laminated contact strip (13) in a ring concentric with the longitudinal axis of the movable arc contact (6) is connected to the fixed mating contact (5) so that the laminated contact strip (13) and the movable arc contact (6) act together as a sliding contact.

7. The sliding contact device according to claim 6, It is characterized in that The laminated contact strip (13) is connected to the fixed contact tube (5) via a shoulder.

8. The sliding contact device according to claim 6, It is characterized in that The laminated contact strip (13) is arranged in a groove of a fixed contact tube (5).

9. A sliding contact device according to any one of the preceding claims, It is characterized in that The contact tube (5) is realized as a cast part.

Images