Method for operating a circuit breaker and circuit breaker

Patent metadata

Field	Value
Publication number	US-10297409-B2
Application number	US-201514970606-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Jan 20, 2015
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A method is disclosed for operating a circuit breaker, the circuit breaker. The circuit breaker includes an operating lever, a latching mechanism and an electrical contact system with a movable contact and a fixed contact. The operating lever is movable into an ON-position and an OFF-position. Further, the operating lever is mechanically connected via the latching mechanism to the contact system such that when the operating lever is in its OFF-position, the contacts of the electrical contact system are opened and when the operating lever is in its ON-position, the contacts of the electrical contact system are closed. Further, such a circuit breaker is also disclosed.

First claim

What is claimed is:

1. A method for operating a circuit breaker, the circuit breaker including an operating lever, a latching mechanism and an electrical contact system with a movable contact and a fixed contact, the operating lever being movable into an ON-position and being mechanically connected via the latching mechanism to the electrical contact system such that when the operating lever is in the ON-position, the movable and fixed contacts of the electrical contact system are closed, the method comprising:
moving the operating lever in the ON-position;
transferring the movement of the operating lever via the latching mechanism to the contact system by moving a connecting device of the latching mechanism, mechanically directly connected to the contact system in a first direction, and thereby moving the movable contact;
reaching the ON-position of the operating lever and closing the movable and fixed contacts of the contact system; and
inhibiting a movement of the connecting device in a second direction, different from the first direction by bringing a touching surface of a tension lever into direct contact with a first stationary mechanical stop and bringing a surface of the connecting device into direct contact with a touching surface of a second stationary mechanical stop thereby preventing opening of the movable and fixed contacts.

2. The method of claim 1 , wherein the inhibiting includes inhibiting a movement of the connecting device in the first direction.

3. The method of claim 1 , wherein the second direction is opposite to the first direction.

4. The method of claim 1 , wherein the first and the second direction are circular directions.

5. The method of claim 1 , wherein, in the inhibiting, at least one of the movements of the connecting device is inhibited by contact of the touching surfaces with the connecting device.

6. The method of claim 2 , wherein, in the inhibiting, at least one of the movements of the connecting device is inhibited by contact of the touching surfaces with the connecting device.

7. The method of claim 1 , wherein, inhibiting movement of the connecting device in the second direction includes bringing the touching surface of the tension lever into direct contact with the first stationary mechanical stop which is separate from the tension lever and the connecting device and bringing a surface of the connecting device into direct contact with the touching surface of the second stationary mechanical stop which is separate from the tension lever and the connecting device thereby preventing opening of the movable and fixed contacts.

8. The method of claim 1 , wherein the first and second stationary mechanical stops are bolts.

Assignees

• Siemens Ag

Inventors

• Naiman Pavel

Classifications

• H01H2205/002

  fixed to operating part · CPC title

• H01H71/505 Primary

  Latching devices between operating and release mechanism · CPC title

• H01H71/52 Primary

  actuated by lever · CPC title

• H01H71/527

  making use of a walking beam with one extremity latchable, the other extremity actuating or supporting the movable contact and an intermediate part co-operating with the actuator · CPC title

• H01H71/1054

  Means for avoiding unauthorised release · CPC title