KR0144647B1 - Multipole circuit breaker with modular assembly - Google Patents

Abstract

Each blocking module 14 is formed by parallel hexahedral monoblock cartridges 16 made of plastic material and received in corresponding compartments 96, 98, 100 of the substrate 88, the cartridges having one or more fixed contacts 34, 36, an arc extinguishing chamber 84, and a pair of connecting strips 38 and 42 for connecting to the trap module 46 and the terminal 40 of the same pole. The mechanical actuation module 122 constituted by the switching bar 82 and the actuator 60 assembly is securely coupled to the cover 90. The rotary trip bar 52 is supported by clip means 138, 140 arranged at the bottom of the cover 90. The plurality of recesses 114, 116 and the incisions 138, 140 may comprise a first subassembly A consisting of a substrate 88 with a series of blocking modules 14 and a trip module 46, 46a, a mechanical actuation module 122. ), The first to the switching bar 82 and the trip bar 52, respectively, when the trip bar 52 and the latch 58 engage with the second subassembly B formed by the fitted cover 90. It is disposed in the spacers 94 and 95 of the substrate 88 to act as a support surface.

Description

Multipole Circuit Breaker with Modular Assembly

1 is a schematic cross-sectional view showing a multi-pole circuit breaker according to the present invention with the contact open.

2 is an exploded view of the various modules that make up the circuit breaker of FIG.

3 shows a mechanical actuation module formed by assembling a switching bar to an actuation mechanism.

4 is a front view of a switching bar with movable contacts.

5 is a front view of a trip bar.

6 shows two preassembly subassemblies of the circuit breaker of FIG.

7 is a plan view of the subassembly A of FIG.

8 is a front view of the subassembly B of FIG.

* Explanation of symbols for main parts of the drawings

12: case 14: blocking module

16: Cartridge 18, 88: Board

24: movable contact 34, 36: fixed contact

35, 37: Connection conductor 38, 42: Contact strip

40, 50: connection terminal 46: trip module

52: trip bar 60: operating mechanism

64: handle 66,68: support plate

70: connection spring 82: switching bar

90: Cover 96,98,100: Compartment

FIELD OF THE INVENTION The present invention relates to a multipole circuit breaker with a molded insulated case, which is subdivided into several parallel compartments by spacers to accommodate several poles, each of which includes a tripping module and a breaking module with detachable contacts. A substrate; A cover fixed to the substrate to seal the case; An actuating mechanism having a toggle device associated with the connecting spring and the trip hook and mounted between the pair of support plates; A handle coupled to the mounting mechanism and accessible from the outside through a hole in the cover; A switching bar made of an insulating material serving as a support for the movable contacts of all poles and mechanically coupled to a toddle device mounted to limit rotation between the closed and open positions of the contacts; And a trip bar which interacts with the trip modules of the poles and the latch of the tripping hook.

Depending on conventional electrical equipment, the protective circuit breaker may be single pole or multipole with two, three or four poles. Depending on the circuit breaker rating and the type of protection required, certain components or components, in particular implements, switching bars, contact parts, power saving chambers, tripping devices, should also be appropriately adopted. To this end, the range of circuit breakers requires a number of alternatives. Manufacturing such a range causes assembly problems because the parts or components to be employed are not always the same shape or structure and are not easily interchangeable.

It is an object of the present invention to obtain a multipole circuit breaker having a modular structure which enables several types of construction of modules of standard specification.

The circuit breaker according to the invention is characterized in that each blocking module is formed by a parallelepiped monoblock cartridge made of plastic material and received in a corresponding compartment of the substrate, the cartridge having one or more fixed contacts, an arc extinguishing chamber, and the same pole. Accepts a pair of connecting strips for connecting to trip modules and terminals of; Fixed to the cover is a mechanical actuation module constituted by a switching bar and an actuator assembly; The rotary trip bar is supported by clip means disposed on the bottom of the cover; And a plurality of grooves and cutouts disposed in the spacers of the substrate, the first subassembly A consisting of a substrate having a series of blocking modules and trip modules, the first subassembly A being formed by a cover in which a mechanical operation module, a trip bar and a latch are fitted. When combined with the two subassemblies, they act as first ground planes for the switching bar and the trip bar, respectively.

The full range of molded insulated case circuit breakers can be manufactured from several different types of break, trip and mechanical actuation modules depending on the desired performance and rating. The structure in this case remains the same for any number of poles, regardless of the module selected for assembly. The positioning of the switching bar is performed simultaneously with the positioning of the trip bar when the two preassembled subassemblies are joined.

On the substrate side, the bar is located in two lower half bearings formed by the parallel arrangement of notches provided in the grooves of the spacer and the large side panel of the cartridge. On the cover side, the upper half bearing of the bar is formed by the curved support surfaces securely coupled to the implement support plate.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In Figures 1 and 2, the pole 10 of the multipole circuit breaker 10 with molded insulation case 12 comprises a single pole blocking module 14, which is made of molded plastic material. Monoblock cartridge 16 having a rectangular parallelepiped shape. The cartridge 16 comprises a substrate 18, a front channel 20 having an orifice 22 for the passage of the movable contact 24, two parallel large side panels 26, 28 and a connection It consists of two parallel small side panels 30, 32.

Two fixed contacts 34, 36 arranged inside the cartridge 16 connect the conductors 35, 37 to the first contact strip 38 and the second contact strip 42 of the connection terminal 40. The second contact strips 42 are connected to each other, and the second contact strips 42 are connected to the third contact strips 44 of the trip module 46 by screws 43.

The trip device comprises a trip module 46, which in FIG. 1 has a fourth contact strip 48 opposite the contact strip 44 which forms part of the other connection terminal 50 of the pole. It is formed by a magnetothermal trip device. The trip module 46 is connected in series with the contacts 34, 36, 24 of the blocking module 14 at the pole.

In the closed state of the circuit breaker, current enters through the input terminal 40, so that the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, the contact strip 42, 44, the trip device 46 and the output terminal 50 flows continuously.

The trip device adds a trip bar 52 which is mounted to limit rotation between the charging position and the trip position, depending on the position of the component for operating the trip module 46, for example the bimetallic strip 54 or blade 56. It includes. The rotary trip bar 52 moves to the trip position as soon as the current flowing through the pole exceeds a predetermined limit. The trip bar 52 also interacts with a latch 58 of the implement 60 with a toggle 62 and a handle 64.

The implement 60 is common to all poles and is handled 64 in the case 12 between two metal support plates 66 and 68 and accessible from the outside through the opening 65 in the case 12. Only the circuit breaker 10 can be operated.

The actuator 60 includes a trip hook 70 pivotally mounted on parallel support plates 66 and 68, the free end of which engages the latch 58 in the charging position. The connecting spring 72 is fixed between the connecting spindle 74 of the toggle 62 and the spindle 76 securely coupled to the base 78 of the handle 64.

The lower rod 80 of the toggle 62 engages the projection 81 of the switching bar 82 which acts as a support for the movable contact 24 of all the poles. The switching bar 82 is made of an insulating material and extends parallel to the trip bar 52 in the transverse direction of the poles. The top rod of the toggle 62 is connected on the trip hook 70.

The trip bar 52 on the latch 58 releases the hook 70 by a release action, which is released due to the expansion action of the connecting spring 72 and consequently the pivot of the toggle 62 and the contacts of all poles. This results in movement by rotation of the switching bar 92 to the open position of (34, 36, 24). Instructions for releasing latch 58 may come from magnetic thermal trip module 46 or an auxiliary trip device, in particular shunt release MN, closing release MX, automatic trip device, and the like.

The blocking module 14 additionally houses two arc extinguishing chambers, one of which is shown in FIG. 1. The exit from the extinguishing chamber 84 is in communication with the opening 86 to allow the blocking gas to escape out of the cartridge.

According to FIG. 2, the insulating case 12 of the circuit breaker 10 comprises a substrate 88 on which an assembly of a cover 90 and a closing front plate 92 is fitted from above. The interior of the substrate 88 is subdivided into several parallel compartments by intermediate spacers 94 and 95 to accommodate various poles. In FIG. 7, the two side compartments 96 and 100 are shown empty, while the center compartment 98 has the cartridge 16 of the blocking module 14 installed on the left side and the trip module 46 installed on the right side. Represented by.

In FIG. 2, the magnetic thermal trip module 46 may be replaced with an electromagnetic trip module having a wide tripping threshold setting range as disclosed in another trip module 46a, for example, French Patent FR 2,639,148.

The switching bar 82 shown enlarged in FIG. 4 has three fork movable contact assemblies 24 arranged at regular intervals along the transverse direction of the switching bar 82. The two middle portions of the switching bar 82 have both cylindrical support surfaces 102, 104 provided with center rings 106, 108 in the central area.

In FIG. 7, the large side panels 26, 28 of each cartridge 16 include a pair of U-shaped notches 110, 112 facing the front panel 20. The pair of grooves 114, 116 provided at the upper edges of the spacers 94, 95 of the substrate 88 are aligned with the respective notches 110, 112 of the cartridge 16 in the transverse direction.

Furthermore, the spacers 94, 95 provide elongated holes 118, 120 extending in the middle to align the small division gaps between the compartments 96, 98, 100.

From FIG. 2, the protrusion 81 of the switching bar 82 can be coupled to the lower rod 80 of the actuation mechanism 60 to obtain the mechanical actuation module 122 of FIG. 3. The two parallel metal support plates 66, 68 of the actuator 60 are positioned on the spacers 94, 95 when the cover 90 is fitted on the substrate 88. 123, 124 are provided.

In FIG. 5, the trip bar 52 made of molded insulating material has two cylindrical ends 126 and 128, two cylindrical intermediate support surfaces 130 and 132, an actuating pin 134 and a latch configured to operate by a tripping aid. Operating portion 136 of 58;

The bottom of the cover 90 (see FIGS. 2 and 8) is capable of receiving the two ends 126, 128 by clipping to position the trip bar 52 on the cover 90. It has two flexible support tabs 138 and 140 at both edges. The latch 58 also securely engages the bottom, preferably intermediate region, of the cover 90 to interact with the actuation site 136 associated with the trip bar 52.

In addition to the recesses 114, 116 on the left side of the spacers 94, 95 for receiving the switching bar 82, the cylindrical support surfaces 130, 132 of the trip bar 52 on the right side of the spacers 94, 95. Other U-shaped incisions 138 and 140 are provided (see FIG. 7).

From several standard modules 14, 46, 46a, 122, a full range of molded case circuit breakers can be manufactured depending on the desired performance and rating. The latch 58 and the trip bar 52 are two mechanical parts that are securely fixed to the cover 90 and are correlated to the type of modules 14, 46, 46a, 122 used to construct the circuit breaker 10. Remains the same without.

In addition to the two types of trip modules 46 and 46a, one or two arc extinguishing chambers with one or two arcing fire extinguishing chambers with a predetermined number of disconnecting mechanisms adapted to suit the breaking capacity of the circuit breaker, There is a blocking module 14.

The separation between the connection terminal strips 38, 42 is constant for all types of module 14.

The mechanical actuation module 122 is also suitable for the power of the circuit breaker 10 as there are actuation mechanisms 60 having various diameter switching bars 82 and a connection spring 72 of a certain hardness.

After the standard modules 14, 46, 46a, 122 included in the substrate 88 and the cover 90 are selected, the manufacture of the circuit breaker 10 can be done by an automatic assembly machine.

6 to 8, a first subassembly A consisting of a substrate 88 containing various pole blocking modules 14 and a trip module 46, a cover 90 and a front plate. The circuit breaker 10 is formed by engagement with the second subassembly B formed of the 92, and the mechanical operation module 122, the trip bar 52, and the latch 58 are fitted into the second subassembly. Fit.

When two subassemblies A and B are combined, the case 12 is sealed and the switching bar 82 and the trip bar 52 are automatically placed on each support of the spacers 94 and 95 of the substrate 88. . In the course of fitting the second subassembly 13 onto the substrate 88, the movable contacts 24 of the switching bar 82 pass through the orifice 22 of the cartridge 16 through the fire extinguishing chamber 84. Penetrates into.

The assembly is held in place by fastening screws (not shown) that hold the two subassemblies A and B against each other.

The rotational fitting of the switching bar 82 is done at the level of the joining plane of the two subassemblies A and B. The support surfaces 102, 104 are formed of two half-day bearings formed by the grooves 114, 116 of the spacers 94, 95 and the aligned notches 110, 112 of the cartridge 16, and of the actuator 60. It is located between two upper half bearings formed by curved second support surfaces 144, 146 aligned to the lower edge of the support plates 66, 68.

Claims (6)

Multiple parallel compartments by spacers 94 and 95 to accommodate the various poles comprising the disconnect module 14 and the trip module 46 and 46a respectively with detachable contacts 34, 36 and 24. A substrate 88 that can be subdivided into 96, 98, and 100; A cover 90 fixed to the substrate 88 to seal the case 12; An actuator 60 having a toggle device 62 associated with the connection spring 72 and the trip hook 70 and mounted between the pair of support plates 66 and 68; A handle (64) coupled to the actuator (60) and accessible from the outside through a hole (65) of the cover (90); Switching bars made of insulating material serving as a support for the movable contacts 24 of all poles and mechanically coupled to the toggle device 62 mounted for limited rotation between the closed and open positions of the contacts ( 82); And a trip bar 52 which interacts with the trip modules 46, 46a of the poles and the latch 58 of the trip hook 70, wherein each of said cut-offs has a molded insulation case. The module 14 is formed by parallel hexahedral monoblock cartridges 16 made of plastic material and received in corresponding compartments 96, 98, 100 of the substrate 88, the cartridges having one or more fixed contacts 34, 36. ), An arc extinguishing chamber 84 and a pair of connecting strips 38 and 42 for connecting to the trip module 46 and the terminal 40 of the same pole, the switching bar 82 and the actuator ( 60. The mechanical actuation module 122 constituted by the assembly is securely coupled to the cover 90, and the rotary trip bar 52 is supported by clip means 138 and 140 disposed on the bottom of the upper cover 90. A plurality of grooves 114, 116 and sections disposed in the spacers 94, 95 of the substrate 88. The parts 138 and 140 may include a cover in which a first subassembly A made up of a substrate 88 having a series of blocking modules 14 and trip modules 46 and 46a is fitted with the mechanical operation modules 122 and 58. 90. A multipole circuit breaker, characterized in that it acts as a first support surface for the switching bar (82) and the trip bar (52), respectively, when engaged with the second subassembly (B) formed by the second subassembly (B). 2. The cartridge (16) of claim 1, wherein the cartridge (16) of each blocking module (14) is provided with a front panel (20) provided with an orifice (22) for passage of a corresponding movable contact (24), and the switching bar (82). Two parallel large side panels 26, 28 having notches 110, 112 aligned with the grooves 114, 116 of the spacers 94, 95 in the transverse direction, and the switching bar 82. The support plates of the actuating mechanism 60 together with two lower half bearings formed by the parallel arrangement of the grooves 114, 116 of the spacers 94, 95 and the notches 110, 112 of the cartridge 16. A multipole circuit comprising two or more cylindrical support surfaces (102, 104) positioned between two upper rust bearings constituted by curved second support surfaces (144, 146) securely coupled to (66, 68). breaker. 3. The spacers (94, 95) of claim 2, wherein the spacers (94, 95) provide elongated holes (118, 120) extending longitudinally to place split gaps between the compartments (96, 98, 100) of the substrate (88). Each support surface (102,104) of the switch bar (82) is provided with a center ring (106,108) configured to engage a corresponding hole (118,120) of the spacers (94,95). 2. The two support plates 66, 68 of the actuator 60 are mounted on the spacers 94, 95 when the cover 90 is fitted on the substrate 88. Multi-circuit circuit breaker, characterized in that it has a supported position fixing projections (123, 124). 2. The clip according to claim 1, wherein the clip means (138, 140) comprise two flexible tabs at the two edges of the cover (90) that can accommodate the two cylindrical ends (126, 128) of the insulated trip bar (52). The bar further comprises two intermediate support surfaces (130,132) supported by the cutouts (138,140) of the spacers (94,95). 2. The connection strip according to claim 1, wherein each said cartridge (16) comprises two opposing parallel small side panels (30, 32) extending perpendicular to said connection strips (38, 42). Multi-circuit circuit breaker, characterized in that the distance between them is constant for all types of blocking modules (14).