DE9212150U1 - Position indicator for an isolating contact arrangement with withdrawable and withdrawable circuit breakers in switchgear - Google Patents

Description

Position indicator for a isolating contact arrangement for retractable and extendable circuit breakers in switchgear

The invention relates to a position indicator for an isolating contact arrangement in retractable and extendable circuit breakers in switchgear according to the preamble of claim 1.

In the case of such isolating contact arrangements, relatively complex and inaccurate display devices that could be pivoted around a rotation axis were previously provided for displaying the OFF, TEST and ON positions of the isolating plate. These devices sometimes did not allow the position of the isolating plate to be clearly identified and could also be easily damaged by external influences. This required a complex repair or at least a laborious readjustment.

The invention is based on the object of creating a simple, reliable and precise display for the positions of the separating plate and thus of the entire isolating contact arrangement, consisting of a few robust individual parts.

Gluckstrasse 7 D-3300 Bonn 1

Telephone: (0228) 65&bgr;&iacgr;>91 &idiagr;.65909,2 _## Deuische Bank AG Bonn

Telegrams: Bcjinpjitent JontiJ* ·**; ·· I*'(%!«£5sO7OO59) 0503185
Fax: (0228) 65^693 gitvocaj* · · ***. · &id;

Postgiro account Cologne

(Bank code 37010050) 166927-501

This object is achieved according to the invention by the characterizing feature of claim 1, while particularly advantageous further developments of the invention are characterized in claims 2 to 6.

The position indicator according to the invention consists of only two extremely simple moving parts, the curved band and the compression spring supporting it, both of which are manufactured in the simplest way and can be easily mounted in the recess on the support plate of the circuit breaker without additional adjustment so that a safe and precise indication of the position of the isolating contact arrangement is guaranteed. Depending on the position of the isolating contact arrangement, the curved spring band is moved past the viewing window by the isolating plate against the effect of the compression spring. The respective position ON, TEST or OFF is displayed in the viewing window. There is only one pressure contact of the spring indicator band against the isolating plate, both when it is moved under the display window and when the circuit breaker is lifted off the isolating contact arrangement.

A preferred embodiment of the invention is shown schematically in the drawing.

Fig. 1 is a partial side view of an isolating contact arrangement between a fixed installation part and a circuit breaker with an adjustable isolating plate in the OFF position,

Fig. 2 is a partial three-dimensional representation, enlarged compared to Fig. 1, of a display device for the positions of the separating plate and the associated isolating contact arrangement and

Fig. 3 is a longitudinal section through this position indicator according to section line III - III of Fig. 2.

In the isolating contact arrangement 1 shown, there are contact elements 4, 5 on the circuit breaker 2 and on busbars 13 in the fixed system part 3, which can be conductively connected to one another or separated from one another by contact bridges 6, the contact pieces 7 of which engage the contact elements 4, 5 of both the fixed system part 3 and the circuit breaker 2 in a form-fitting and force-fitting manner under spring force.

In the disconnected position of the isolating contact arrangement 1, the contact pieces 7 of the contact bridges 6 rest with their end facing the circuit breaker 2 on isolating elements 10 made of insulating plastic, into which the opposite contact elements 4 can be inserted so far in the inserted position of the circuit breaker 2 that they are located in the area of the contact ends of the contact bridges 6 held apart by the isolating elements 10.

The separating elements 10 are parts of a separating plate 12 that can be moved between the fixed system part 3 and the inserted circuit breaker 2 and that completely covers the space between the busbars 13 on the fixed system part 3 and the circuit breaker 2. The separating plate 12 is mounted so that it can move on the fixed system part 3, and the contact elements 4 of the circuit breaker 2 can be inserted into the open ends 14 of the separating elements 10 facing them when the circuit breaker 2 is put in place.

The separating plate 12 with the separating elements 10 for the contact pieces 7 of the contact bridges 6 is arranged so as to be displaceable in the direction of the contact bridges 6 and away from them by means of an adjusting gear 50, which is only partially shown,

that the separating elements 10 with the separating plate 12 can be moved in and out between the ends of the contact pieces 7 facing the circuit breaker 2.

In order to secure the circuit breaker 2 to the fixed system part 3, a locking device 100 is provided which, on the one hand, fixes the circuit breaker 2 to the fixed system part 3 and, on the other hand, serves to secure the separating plate 12 with the separating elements 10 arranged thereon at different distances between the fixed system part 3 and the inserted circuit breaker 2.

This locking device 100 for the circuit breaker 2 consists of at least one retaining bracket 101 protruding from the rear or the support plate 32 of the circuit breaker 2 with an engagement opening for a retaining hook 103 that can be pivoted on the fixed system part 3 and that can be actuated from the outside of the separating plate 12 and the circuit breaker 2 by means of an actuating rod 123 and a manual actuating lever 151, just like a locking lever 104 that secures the separating plate 12 in the OFF, TEST and ON positions (Fig. 3). The OFF, TEST and ON positions of the separating plate 12 with the separating elements 10 are indicated in Fig. 3 in dash-dotted lines with the reference numerals 105, 106 and 107.

The position indicator 160 consists of a spring-loaded indicator strip 163, curved transversely to its longitudinal direction, which is mounted on the circuit breaker 2 essentially parallel to the separating plate 12 below a viewing window 161 (Fig. 2 and 3) against a compression spring 162 and has markings "0", "T" and "I" for the OFF, TEST and ON positions. The indicator strip 163 is bent vertically against the separating plate 12 with its free end 164 and supported on it. It is advantageously made of a spring-loaded steel strip in the manner of a measuring tape, and can

but can also be made from a suitable plastic band with corresponding spring properties.

The indicator strip 163 is guided on its two longitudinal edges in a groove-shaped recess 164 on the support plate 32 of the circuit breaker 2, which is closed by a cover plate 166 having the viewing window 161. At the other end opposite the compression spring 162, behind the viewing window 161, the recess 165 has a transverse slot 167 (Fig. 3) through which the bent end 164 of the strip protrudes downwards against the separating plate 12.

The transverse slot 167 is also provided with an extended guide web 168 for the display band 163, which is angled towards the separating plate 12 and protrudes vertically downwards against the separating plate 12 and safely deflects the spring-loaded band.

The display band 163 has a central fastening pin 169 for the compression spring 162 at one end and is rounded at its other free end 164 which rests on the separating plate 12.

Depending on whether the separating plate 12 and thus the isolating contact arrangement 1 is in the OFF, TEST or ON position, the curved spring-loaded display band 163 supported on the separating plate 12 is guided by the spring force of the compression spring 162 in such a way that the corresponding marking "0" for the OFF position, "T" for the TEST position and "I" for the ON position appears in the viewing window ¹⁶¹ in accordance with Fig. 2.

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ATTORNEY FILE 2 554/92

List of reference symbols

1 isolating contact arrangement

2 circuit breakers

3 fixed plant part

4 Contact element

5 Contact element

6 contact bridges

7 Contact pieces 10 Separating lines

12 Divider plate

13 busbars

14 open ends 32 support plate

50 variable speed gears

100 Locking device

101 Retaining bracket

103 retaining hooks

104 Locking lever

105 OFF position

106 TEST position

107 ON position

123 Operating rod

151 Manual operating lever

160 Position indicator

161 viewing windows

162 compression spring

163 Display band

164 free end

165 Deepening

166 Cover plate

167 Cross slot

168 Guide bridge

169 Fixing pins

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Claims (6)

Applicant: 8 September 1992 Klöckner-Moeller GmbH Hein-Moeller-Str. 7-11 Bonn 1 VNR: 108 545 ATTORNEY FILE 2 554/92 Protection claims 1. Position indicator for a isolating contact arrangement for retractable and extendable circuit breakers (2) in switchgear, wherein contact elements (4, 5) and contact bridges (6) connecting these are provided on the circuit breaker (2) and on busbars (13) in the fixed system part (3), and where a separating plate (12) with separating elements (10) for the contact bridges (6) is arranged between the positions OFF, TEST and ON and vice versa between the circuit breaker (2) and the fixed system part (3) and is secured in each of these positions by a locking lever (104) on the fixed system part (3), characterized in that the position indicator (160) consists of a resilient display band (163) curved transversely to its longitudinal direction, which is displaceable on the circuit breaker (2) essentially parallel to the separating plate (12) below a viewing window (161) against a compression spring (162), with Markings for the OFF, TEST and ON positions, which with its free end (164) is bent approximately vertically against the separating plate (12) and supported on it. QM-fr»i-MV 2. Position indicator according to claim 1, characterized in that the indicator band (163) consists of resilient strip steel in the manner of a measuring tape. 3. Position indicator according to claim 1 or 2, characterized characterized in that the display band (163) is guided in a groove-shaped recess (165) on the supporting plate (32) of the circuit breaker (2), which is closed by a cover plate (166) having the viewing window (161) and has a transverse slot (167) at the other end opposite the compression spring (162) behind the viewing window (161), through which the bent end (164) of the band protrudes downwards against the separating plate (12). 4. Position indicator according to claim 3, characterized in that the transverse slot (167) has an extended guide web (168) for the indicator band (163) which is angled perpendicularly to the separating plate (12). 5. Position indicator according to one of claims 1 to 4,
characterized in that the indicator band (163) has a central fastening pin (169) at its end for the compression spring (162). 6. Position indicator according to one of claims 1 to 5,
characterized in that the display band (163) is arranged at its free end on the separating plate (12) resting end (164) is rounded.