CN1118511A

CN1118511A - Electrical circuit breaker with electromagnetic actuator for high ratings

Info

Publication number: CN1118511A
Application number: CN95108439.9A
Authority: CN
Inventors: 让-伊维斯·安布拉德; 弗兰克伊斯·布奇; 菲利普·德坎博里; 埃里克·多梅琼; 阿兰·门尼尔
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 1994-07-18
Filing date: 1995-07-18
Publication date: 1996-03-13
Anticipated expiration: 2015-07-18
Also published as: EP0693764B1; HU9502111D0; EP0693764A1; ATE178160T1; FR2722609A1; FR2722609B1; DE69508482D1; TR199500864A2; RU95113114A; DE69508482T2; CN1052332C; ES2131291T3; HU215878B; RU2144715C1; HUT73314A

Abstract

The circuit breaker is fitted with an electromagnetic actuator (AE), comprising a magnetic circuit (7) in the form of an 'H'. The circuit includes a first air gap (17) in which a mobile contact arm (5) is suspended and a second air gap (19). A hammer (9) is connected to the paddle (8) to reinforce the opening action of the contact arm (5). The hammer (9) is formed by an extended piece situated between the magnetic circuit (7) and the first compartment (30). This cooperates with the support (26) of the contact arm (5) to block the passage (28) between the first (30) and second (32) compartments after attraction of the paddle (8), and to free the passage after the return of the paddle (8) to its separated position.

Description

Circuit breaker

The present invention relates to a kind of circuit breaker high rated power, that have electromagnetic actuators that is used for.

Common circuit breaker has a molded insulation box body, this box body comprises first compartment and each discrete contactor that second compartment of electromagnetic actuators is housed and links to each other with arc control device that hold operating mechanism, described actuator has a magnetic circuit, and comprise: a fuse, be equipped with an excitation coil above it; One first air gap, the movable contactor arm extends in this air gap, is in the resting position that makes each contactor be closure state, and, when surpassing the predetermined threshold value, current strength is in the position that the active contactor is separated; A pivot plate, it constitutes and the opposed interstice of first air gap with the magnetic pole end face of magnetic circuit; One link to each other with plate hit plate, plate is reclined the magnetic sheet end face by magnetic attraction after, hit plate along disconnecting directive effect on the contactor arm.

On circuit breaker, adopt a circuit actuator just can obtain very strong cut-off capacity with the quick separation that causes each contactor.Yet extinguish arcs can produce ionized gas again in arc control device, and this gas easily produces some external presentations.End face one side forwardly, this phenomenon are especially not wish to occur, because this ionized gas of overflowing from the aperture can make handle move.

The objective of the invention is to obtain a kind of to all insensitive high performance circuit circuit breaker of any external presentation.

The characteristics of circuit breaker of the present invention are, hitting plate is made of the elongated member between the magnetic circuit and first compartment, and with the supporting arrangement of contactor arm, after plate is attracted, cut off the path between first and second compartments, and get back to the open later on described path in separation point position at plate.

According to a preferential embodiment of the present invention, be set in the hinge axle and the mesozone between the interstice of plate hitting the axle that plate is connected on the plate.Hit plate and constitute a cover plate, be contained in the inside of box body.Path between two compartments preferably is positioned at first air gap top, facing to fixed contact.

According to a feature of the present invention, contactor arm supporting arrangement comprise with the synergistic retaining device of this mechanism and one and the free end synergy of hitting plate to define the supporting end face of described path.

To only making an explanation, therefrom can more be expressly understood advantages and features of the invention below as non-limiting illustration and one embodiment of the present of invention of being shown in the accompanying drawing, in the accompanying drawing:

Fig. 1 is the front view that the circuit breaker of actuator of the present invention is housed;

Fig. 2 is the perspective view of actuator shown in Fig. 1;

Fig. 3 is the cutaway view along face in the actuator among Fig. 2, the plate among the figure and hit plate and be in the Puiescent, inoperative position;

Fig. 4 is the plane graph of Fig. 3;

Fig. 5 is the view identical with Fig. 3, the plate among the figure and hit plate and be in the position of working;

Fig. 6 is the plane graph of Fig. 5.

Referring to Fig. 1, circuit breaker 1 comprises a box body 2, hold movable contactor 4, one arc control device 6 that a static contactor 3, is installed in movable contactor arm 5 ends and can make the static various electrical equipment link (not shown) that are connected with the terminal (not shown) with movable contactor.This circuit breaker also comprises an electromagnetic actuators AE, and it causes the circuit breaker tripping operation when breaking down, and static contactor 3 is separated fast with movable contactor 4.

This electromagnetic actuators AE comprises that 7, one pivot plates 8 of yoke of being made by magnetic material and one hit plate 9.

As shown in Figure 2, H shape yoke or magnetic circuit 7 comprise that a cylindrical core 10 that is being held by coil 34 and two are parallel to each other and with the side plate 11 and 12 of the orthogonal axe of fuse 10.Side plate 11 has first end 13 and opposed second end 14 towards plate 8.Another side plate 12 comprises the 3rd end 15 and opposed the 4th end 16 towards plate 8.The magnetic pole end face of the straight end face 18 synergistic coplanes of first end 13 and the 3rd end 15 formations and plate 8.Second end 14 and the 4th end 16 constitute the straight end face that faces with each other, to define first air gap 17.

When electromagnetic actuators AE was static, plate 8 was positioned at the place of yoke 7 end faces 13 certain distances, formed interstice 19.Structure flap sheet 8 is installed on the hinge axle 21, and movable contactor arm 5 also pivotally is installed on another hinge axle 22.Static contactor 3 is positioned at air gap 17 bottoms, and movable contactor arm 5 has at least a part to pass air gap 17.Hit plate 9 and be substantially the elongated member of rectangle, the one end is hinged on the connection axle 23 on the plate 8, and its another free end 24 is located near the movable contactor arm 5 of static contactor 3 opposed sides.

The width with box body is identical substantially to hit the width of plate.

Fig. 3-6 in the ginseng, movable contactor arm 5 is by supporting arrangement 26 supporting, this device is mutually opposed with movable contactor 4, and have retainer and mechanism's (not shown) act synergistically with the closure of realization contactor 3,4 with separate.Supporting arrangement 26 also comprises a supporting end face 36 with free end 24 collaborative works of hitting plate 9.

The connection axle 23 of hitting plate 9 on the plate 8 is between hinge axle 21 and interstice 19.Hit the free end 24 of plate 9 and separated by a line of rabbet joint shape passage and supporting end face 36, the width of the line of rabbet joint can change according to the magnetized state of electromagnetic actuators AE.

On the make position (Fig. 3,4) of contactor 3,4, the magnetic flux that is produced in interstice 19 by the rated current in the actuator AE coil is not enough to the magnetic pole end face 13 of plate 8 suctions to magnetic circuit 7.Because the effect of back-moving spring, plate 8 remains on the separation point position, hits plate 9 and also keep motionless on its Puiescent, inoperative position.The line of rabbet joint that hits between the supporting arrangement 26 of plate 9 and arm 5 is maximum 28 this moments, and makes the contact zone be communicated with the upper compartment of holding mechanism 31.

When short circuit current occurring, in the magnetic circuit 7 magnetic flux be increased in the very big electromagnetic force of generation in first air gap 17, contactor arm 5 is urged to open position (Fig. 5 and 6).Simultaneously, pivot plate 8 is attracted to the magnetic pole end face 13 of interstice 19, and makes and hit plate 9 along the equidirectional translation.End 28 touches with supporting arrangement 26 and closes, and accelerating contactor arm 5 is switched to open position, and seals the line of rabbet joint 28 simultaneously.When contactor 3,4 took place to separate, the ionized gas that electric arc produced can not enter upper compartment 30, and still stayed among the interval, bottom 32 that holds arc control device.Thereby, be in the position that is attracted and under the situation that the line of rabbet joint 28 is still sealed,, hit plate 9 except the function of quickening contact arm 5 at plate 8 promptly as long as the electric current in the coil surpasses predetermined value, also play a part two separation cover plates between the compartment.In the arc extinguishing process, the shutoff of the line of rabbet joint 28 can avoid ionized gas to reflux in upper compartment 30, especially avoids refluxing in the aperture of handle passage, thereby avoids showing phenomenon outside the front end face appearance of box body 2 is any.

Claims

1, a kind of circuit breaker with mold insulation box body (2), comprise first compartment (30) that holds operating mechanism (31), one is held second compartment (32) of electromagnetic actuators (AE) and the separable contactor (3,4) that links to each other with arc control device (6), described actuator has a magnetic circuit (7), and comprises:

A fuse (10) is equipped with excitation coil (34) above it;

One first air gap (17), when contactor (3,4) when being closure state, movable contactor arm (5) stretches into this air gap and is in resting position, and when current strength surpassed the predetermined threshold value, it was in the contactor separation point position of working;

A pivot plate (8), it constitutes and the opposed interstice of first air gap (17) (19) with the magnetic pole end face (13) of magnetic circuit (7);

One link to each other with plate (8) hit plate (9), inhaled behind the magnetic pole end face by magnetic force when plate (8), hit plate and act on the contactor arm (5) along opening direction;

It is characterized in that, hitting plate (9) is to be made of the elongated member that is positioned between magnetic circuit (7) and first compartment (30), and with the supporting arrangement (26) of contactor arm (5) synergy, the path (28) plate (8) is attracted after between cut-out first compartment (30) and second compartment (32) is opened described path again after plate (8) is returned to the separation point position.

2, circuit breaker as claimed in claim 1 is characterized in that plate (8) upward connects the axle (23) of hitting plate (9) and is set between the hinge axle (21) and interstice (19) of plate (8).

3, circuit breaker as claimed in claim 2 is characterized in that hitting plate (9) and constitutes a cover plate, be contained in the inside of box body (2), and path (28) is positioned at first air gap (17) top, is opposite to static contactor (3).

4, as each described circuit breaker among the claim 1-3, the supporting arrangement (26) that it is characterized in that contactor arm (5) comprises with the synergistic retainer of mechanism (31) with the free end 24 that hits plate and constitutes the supporting end face (36) of described paths (28).