CN1137684A

CN1137684A - Circuit breaker bell alarm reset mechanism

Info

Publication number: CN1137684A
Application number: CN 96103421
Authority: CN
Inventors: R·K·西摩尔; R·N·卡斯通奎; M·C·盖列特
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1995-02-17
Filing date: 1996-02-16
Publication date: 1996-12-11
Anticipated expiration: 2016-02-16
Also published as: CA2168610A1; ITMI960173A0; CN1052334C; IT1281719B1; JPH08335433A; ITMI960173A1

Abstract

A circuit breaker bell alarm reset mechanism, interfaces thereof between the circuit breaker operating shaft and the bell alarm plunger directly contact the plunger in response to rotational logic provided by the operating shaft. Rotation of the operating shaft to reset the circuit breaker operating mechanism simultaneously motivates the reset mechanism to reset the bell alarm plunger.

Description

Circuit breaker bell alarm reset mechanism

The United States Patent (USP) that is entitled as " circuit breaker with improved operating mechanism " has been described a kind of circuit breaker that can disconnect a few kiloampere electric currents under a few hectovolt voltages for No. 4001742.As described in this patent, the operating mechanism of circuit breaker is being controlled the powerful actuating spring of unlatching and close circuit breaker contact.In case operating mechanism responds and separate contacts, the actuating spring must reload so that enough big motoricity is offered the movable contact arm that the contact is housed.

The U.S. Patent application 08/248910 that is entitled as " bell alarm and the shearing device that are used for great number Dingan County training circuit breaker " (corresponding to the PCT/US95/06577 that submits to May 24 nineteen ninety-five) that on May 25th, 1994 submitted to has been described a kind of spring-loaded plunger, this plunger breaker operation mechanism with the one end in contact, then extends a signal thin slice so that the position mark of the state of indication breaker contact point is provided at its other end.A switching device provides indirect mark above a pair of electric conductor.

A problem of this stroke warning indicating device is: in case breaker contact point resets, be difficult to make stroke warning plunger return.

Purpose of the present invention is exactly to solve the problem that makes stroke warning plunger return in effective and economic mode.

A circuit breaker bell ann reset mechanism is engaged between circuit breaker actuating axle and the stroke warning plunger by a stroke warning drive link face, and this connecting rod is attached to one pivotally on the cam that forms on this actuating axle.One end of this a stroke warning drive link and a restoring lever interacts so that rotate in concert stroke warning drive link with the rotation of driving shaft.

Below in conjunction with accompanying drawing embodiments of the invention are described in detail, wherein:

Fig. 1 is the birds-eye perspective of the circuit breaker of great number Dingan County training, and this circuit breaker comprises a stroke warning piece and stroke ann reset of the present invention mechanism;

Fig. 2 is the amplification front view of birds-eye perspective of the bell alarm of stroke warning piece shown in Figure 1, has wherein removed top cover so that inner parts are shown;

Fig. 3 is the enlarged side view of the part of circuit breaker shown in Figure 1, shows moving contact arm component and stroke ann reset mechanism;

Fig. 4 A-4D is the Zoom Side planar view of the structure of the stroke ann reset shown in Figure 3 mechanism between circuit breaker actuating axle and stroke warning piece.

The great number Dingan County that is shown among Fig. 1 trains the quiescent current that circuit breaker 10 can transmit several kiloamperes under a few hectovolt voltages.This circuit breaker is made of an electrical insulating substrate 11, and the middle cover 12 of a similar insulating material is attached in this substrate 11 before also being the top cover 13 that is made of a kind of electrical insulating material loading onto.With being electrically connected of inner current-carrying element be by from the extended loading contact pin 14 of a side of substrate with from the extended circuit contact pin of substrate opposite side (not shown).Inner member is by electronic trip parts 15 controls that are contained in the top cover 13.The accessory 22 that these tripping operation parts are similar in the sort of tripping operation parts described in the United States Patent (USP) 4581181 and it also with a bell alarm in an accessory dimple 22A interacts, so that the location mark of the state that is placed in the breaker contact point 36,37 (Fig. 3) in the circuit breaker outer cover 11 is provided and provides remote control to indicate by the electric conductor 27 (Fig. 2) that is connected with a remote indicating lamp by signal thin slice 22B.Control handle 16 allows breaker operation mechanism is carried out manual operation so that open and the close circuit breaker contact.The contact also can be by can automatically opening and closure from the

button

17,18 that can touch on top cover 13.The setting of tripping operation parts can observe with relevant key base 20 by display 19.

As described at above-mentioned U.S. Patent application 08/248910, stroke warning piece 22 shown in Fig. 2 comprises a plunger 28, and it stretches in the breaker cover downwards and excites sensitive switch 26 so that by conductor 27 a remote measurement index signal is sent to a warning or an indicator light away from case for circuit breaker.Plunger links to each other with a slide assemblies 24, so that flat 22B of the bias voltage driving signal of the backspring 25 that contends with, thereby the position indication is provided, for example, breaker contact point has responded to disconnect corresponding electric current.

According to the present invention, circuit breaker 10 shown in Fig. 3 comprises a stroke ann reset driver 41 that is contained in the breaker cover 13, and this driver 41 is by breaker contact point carrier 34 interactions in contact point arm drive link 33 and the cam 32 that links to each other with the driving shaft 30 of breaker operation mechanism and the circuit breaker outer cover 11.As described in the above-mentioned United States Patent (USP) 4001742, fixed contact 37 is attached to by support chip 38 on the bottom 39 of circuit breaker outer cover 11, and moving contact 36 then is attached on the movable contact arm 35 of the rotation that responds contact carrier 34 and contact point arm drive link 33.Operating mechanism driving shaft 30 passes the sealing 31 on the operating mechanism side frame 29, and stroke warning driver 41 just is attached on the side frame 29.Actuating between stroke warning piece 22 and the cam 32 connects by stroke

warning drive link

40 and 46 realizations of stroke ann reset lever.

Stroke warning plunger 28 on restoring lever 46 and stroke warning piece 22, and the interaction between the stroke warning drive link 40 on the cam 32 now can be seen the most clearly referring to Fig. 4 A-4D.When breaker contact point shown in Figure 3 is in the state of pass, plunger 28 shown in Fig. 4 A extends downwards with sheet spring 47 on the end of restoring lever 46 and contacts, and the roller 44 on the stroke warning drive link 40 then leaves at the tab on the other end of drive link 45 and sets roof pressure for and drive pin 42 on cam 32.Stroke warning drive link 40 is attached on the cam 32 so that along with the rotation of these cam 32 rotation response cams is freely rotated around this pivot by pivot 43, thereby opens and the close circuit breaker contact.The pivot 49 that restoring lever 46 is rotated by the bias voltage that allows its restoring lever backspring 50 that contends with is attached on the bearing support 48.When cam 32 rotates on clockwise sign direction, drive pin 42 rotates the tab 45 of cam 32 opposings on the end of restoring lever 46, so that clockwise rotate restoring lever, thereby make the sheet spring 47 bump plungers on the restoring lever other end, actuation plunger stroke warning piece 22 in upwards arrival make on the position that plunger is fixed by the permanent magnet (not shown).Backspring 50 on bearing support 48 is along with cam continues to clockwise rotate, can arrive on the enable possition shown in Figure 3 from the reset position elongation of Fig. 4 A, and cam 32 further rotations will make roller 44 arrive on the declivity top 45A of tab 45, thereby drive the end 28A that restoring lever 46 is left plunger 28, make backspring 50 further extend, as illustrated.Cam 32 is being resisted stroke warning drive link 40 and roller 44 is being blocked on the oblique top 45A at the latch 51 on the rotating drive cam 32 on the counter clockwise direction shown in Fig. 4 D, lives so that overcome the end 28A clamping that the bias voltage that reverses of the backspring 50 that loads fully will depart from plunger 28 at the sheet spring 47 on the end of restoring lever.Cam 32 rotation in the clockwise direction makes the sheet spring reverse under the effect of the bias voltage of backspring and contacts with the end 28A of plunger 28, shown in prior figures 3A like that.

The simple structure of having described the rotation of the driving shaft that is used to make stroke warning accessory directly respond breaker operation mechanism herein and having resetted.Directly the mode of response has been eliminated any possibility of the incorrect demonstration of circuit breaker contact switch state.

Claims

1. one kind is used for the circuit breaker that great number Dingan County trains circuit breaker, and it comprises:

A dielectric base (11);

Insulating lid (13) above described substrate, this lid are containing a driving shaft (30) from the opening and closing state of a pair of breaker contact point of the extended control of an operating mechanism side frame (29) (36,37);

A stroke warning piece (22), it comprises that a bottom plunger of extending (28) and one are placed the top indication thin slice (22B) that extends above the circuit breaker outer cover in the circuit breaker outer cover; With

A stroke warning driven unit (41), its face are engaged between this stroke warning piece and this driving shaft, are used to contact this bottom plunger and make this indication thin slice stretch out this outer cover top so that indicate the described closure state of described breaker contact point.

2. circuit breaker as claimed in claim 1, it is characterized in that: it comprises a stroke warning drive link (40), this connecting rod is attached to one on the cam on this driving shaft pivotally with the one end, and ending in a roller place with its other end, this roller is placed a restoring lever (46) that contacts in this driven unit.

3. circuit breaker as claimed in claim 2 is characterized in that: it comprises a drive pin (42) on this cam, and this drive pin is placed and orders about this stroke warning drive link and contact with tab (45) on an end of this restoring lever.

4. circuit breaker as claimed in claim 3 is characterized in that: this restoring lever comprises a sheet spring (47) on its other end, and this sheet spring is placed an end (28A) that contacts this plunger.

5. circuit breaker as claimed in claim 3 is characterized in that: this tab is formed with the top (45A) of a tilted shape, and this roller applies a power on this restoring lever whereby, makes this restoring lever be rotated away from the described end of this plunger.

6. circuit breaker as claimed in claim 1, it is characterized in that: it comprises that this restoring lever is attached to the supporting member (48) on it pivotally, and a backspring (50) that is connected between this restoring lever and this supporting member, this backspring provides bias voltage on this restoring lever when this restoring lever contacts with this roller and rotates.

7. circuit breaker as claimed in claim 6 is characterized in that: it comprises a latch (51) on this cam, and this latch is contacted by this drive link when this cam rotates in the counterclockwise direction.

8. circuit breaker as claimed in claim 1 is characterized in that: one in the described contact is attached on the contact carrier (34).

9. circuit breaker as claimed in claim 8 is characterized in that: this contact carrier is attached on this cam by a contact point arm drive link (33), and this stroke warning drive link and this contact point arm drive link just rotate in concert whereby.