Vibration-limiting device for an apparatus comprising a switchgear and a switching device, such as a circuit breaker, and apparatus comprising said vibration-limiting device

Patent metadata

Field	Value
Publication number	US-10141126-B2
Application number	US-201715651685-A
Country	US
Kind code	B2
Filing date	Jul 17, 2017
Priority date	Jul 15, 2016
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

An apparatus comprises a switchgear having at least one couple of stationary conducting terminals and a switching device, such as a circuit breaker, having at least one couple of corresponding movable conducting terminals. The switching device is movable with respect to the switchgear along a connection/disconnection direction between a connection position, wherein the switching device is electrically and mechanically connected to the switchgear by engagement of the movable conducting terminals with the corresponding stationary contacting terminals by means of contact assemblies coupled either to the movable conducting terminals or to the stationary conducting terminals, and a disconnection position, wherein the switching device and the switchgear are electrically and mechanically disconnected. The apparatus further comprises at least one vibration-limiting device integrally coupled to either one movable conducting terminal of said at least one couple of movable conducting terminals or to one corresponding stationary conducting terminal of said at least one couple of stationary conducting terminals and conformed such that: when the switching device is approaching the connection position moving along said connection/disconnection direction, the vibration-limiting device does not interfere with the other of the one movable conducting terminal or the one corresponding stationary conducting terminal; when the switching device is in the connection position, in case of vibrations of the one movable conducting terminal transversal to said connection/disconnection direction, the vibration-limiting device interferes with the other of the one movable conducting terminal or the one corresponding stationary conducting terminal so to limit the vibrations amplitude.

First claim

The invention claimed is:

1. An apparatus comprising a switchgear having at least one couple of stationary conducting terminals and a switching device having at least one couple of corresponding movable conducting terminals, wherein the switching device is movable with respect to the switchgear along a connection/disconnection direction (CD) between a connection position, wherein the switching device is electrically and mechanically connected to the switchgear by engagement of the movable conducting terminals with the corresponding stationary contacting terminals through contact assemblies coupled either to the movable conducting terminals or to the stationary conducting terminals, and a disconnection position, wherein the switching device and the switchgear are electrically and mechanically disconnected, at least one vibration-limiting device integrally coupled to either one movable conducting terminal of said at least one couple of movable conducting terminals or to one corresponding stationary conducting terminal of said at least one couple of stationary conducting terminals and conformed such that:
when the switching device is approaching the connection position moving along said connection/disconnection direction (CD), the vibration-limiting device does not interfere with the other of the one movable conducting terminal or the one corresponding stationary conducting terminal;
when the switching device is in the connection position, in case of vibrations of the one movable conducting terminal transversal to said connection/disconnection direction (CD), the vibration-limiting device interferes with the other of the one movable conducting terminal or the one corresponding stationary conducting terminal so to limit a vibrations amplitude;
wherein the vibration-limiting device is made of an electrically non-conductive material.

2. The apparatus according to claim 1 , wherein the vibration-limiting device is integrally coupled to one movable conducting terminal of said at least one couple of movable conducting terminals and is configured so to interfere with the corresponding stationary conducting terminal of said at least one couple of stationary conducting terminals when the switching device is in the connection position in case of vibrations of said one movable conducting terminal transversal to said connection/disconnection direction (CD).

3. The apparatus according to claim 2 , wherein said corresponding stationary conducting terminal comprises an end cavity having an inner dimension and the vibration-limiting device comprises a portion having an external dimension smaller than said stationary conducting terminal end cavity inner dimension, such that in the connection position said vibration-limiting device portion is at least partially housed within said stationary conducting terminal end cavity, such that the vibration-limiting device forms a gap (δ) with the stationary conducting terminal such that there is no contact between the vibration-limiting device and the stationary conducting terminal.

4. The apparatus according to claim 2 , wherein said corresponding stationary conducting terminal has an external dimension and the vibration-limiting device comprises a portion having an end cavity having an inner dimension greater than said stationary conducting terminal external dimension, such that in the connection position said stationary conducting terminal is at least partially housed within said vibration-limiting device end cavity, such that the vibration-limiting device forms a gap (δ) with the stationary conducting terminal such that there is no contact between the vibration-limiting device and the stationary conducting terminal.

5. The apparatus according to claim 1 , wherein the vibration-limiting device is integrally coupled to one stationary conducting terminal of said at least one couple of stationary conducting contacts and is configured so to interfere with the corresponding movable conducting terminal of said at least one couple of movable conducting terminals when the switching device is in the connection position in case of vibrations of the corresponding movable conducting terminal transversal to said connection/disconnection direction (CD).

6. The apparatus according to claim 5 , wherein said corresponding movable conducting terminal comprises an end cavity having an inner dimension and the vibration-limiting device comprises a portion having an external dimension smaller than said movable conducting terminal end cavity inner dimension, such that in the connection position said vibration-limiting device portion is at least partially housed within said movable conducting terminal end cavity, such that the vibration-limiting device forms a gap (δ) with the movable conducting terminal such that there is no contact between the vibration-limiting device and the movable conducting terminal.

7. The apparatus according to claim 5 , wherein said corresponding movable conducting terminal has an external dimension and the vibration-limiting device comprises a portion having an end cavity having an inner dimension greater than said corresponding movable conducting terminal external dimension, such that in the connection position said corresponding movable conducting terminal is at least partially housed within said vibration-limiting device end cavity, such that the vibration-limiting device forms a gap (δ) with the movable conducting terminal such that there is no contact between the vibration-limiting device and the movable conducting terminal.

8. The apparatus according to claim 1 , wherein said vibration-limiting device is separated from and connectable in an integral manner to said one movable conducting terminal or said stationary conducting terminal ( 6 ).

9. The apparatus according to claim 8 , wherein said vibration-limiting device is separated from the contact assembly coupled to the respective movable or stationary conducting terminal and locks said contact assembly to said respective movable or stationary conducting terminal when the vibration-limiting device is connected to said respective movable or stationary conducting terminal.

10. The apparatus according to claim 8 , wherein said vibration-limiting device is a portion of said contact assembly.

11. The apparatus according to claim 1 , wherein the vibration-limiting device is a portion of said one movable conducting terminal or of said one stationary conducting terminal.

12. The apparatus according to claim 1 , wherein said contact assembly is a tulip contact assembly or a gripper contact assembly.

13. A vibration-limiting device integrally couplable to either one movable conducting terminal of at least one couple of movable conducting terminals of a switching device or to one corresponding stationary conducting terminal of at least one couple of stationary conducting terminals of a switchgear, wherein the switching device is movable with respect to the switchgear along a connection/disconnection direction (CD) between a connection position, in which the switching device is electrically and mechanically connected to the switchgear by engagement of the movable contacting terminals with the corresponding stationary contacting terminals through respective contact assemblies coupled either to the movable conducting terminals or to the corresponding stationary conducting terminals, and a disconnection position, wherein the switching device and the switchgear are electrically and mechanically disconnected to the switchgear,
wherein the vibration-limiting device is conformed such that:
when the switching device is approaching the connection position moving along said connection/disconnection direction, the vibra

Assignees

• Abb Schweiz Ag

Inventors

• Belloni Francesco
• Farina Andrea

Classifications

• H02B11/04

  Isolating-contacts, e.g. mountings or shieldings · CPC title

• H01H3/00

  Mechanisms for operating contacts ({for tap changers H01H9/0027;} thermal actuating or release means H01H37/02) · CPC title

• H01H1/50 Primary

  Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position · CPC title

• H01H1/58

  Electric connections to or between contacts; Terminals {(for high tension switches H01H33/025; for electromagnetic relays H01H50/14; for circuit breakers H01H71/08)} · CPC title

• H01H1/38

  Plug-and-socket contacts · CPC title