ES2323077T3 - AUXILIARY SWITCH THAT CAN BE MOUNTED ON A LOW VOLTAGE ELECTRIC DISTRIBUTOR. - Google Patents

Abstract

The switch has a housing with two side surfaces aligned parallel to each other, and an actuation device (30) controlled by a circuit breaker of a low-voltage distributor. A contact device (60) has a contact plate (70A) that is aligned parallel to the side surfaces and is loaded with a preload force. The contact plate is adjustably supported and has a contact supporting surface (72A) for contacting an auxiliary bus bar (LA).

Description

Auxiliary switch that can be mounted on a low voltage electrical distributor.

Technical field

The present invention relates to a switch auxiliary according to the preamble of claim 1 of the patent. An auxiliary switch of this type is mounted on a protection switch, especially a protection switch of fault current. In this case, triggers of the Auxiliary switch mechanically with the protection switch. The coupling can be done in two ways. If the switch auxiliary must be used as auxiliary contact, then it is coupled with the protection switch in such a way that it works in a manner similar to the switch point of the switch protection. Instead, if you must act as a contact for signaling, then it is coupled in such a way that it only works in case of electrical activation, such as due to short circuit, Overcurrent or fault current. The construction group that includes protection switches and auxiliary switches plugs into a low voltage distributor, where they are retained main and auxiliary current busbars of Installation on a plug socket. In this case, the auxiliary switch contacts at least one of the bars auxiliary current collectors with the help of an installation of Guided contact through its housing.

State of the art

An auxiliary switch of the type mentioned to principle is described in the Technical Catalog smiss-line S "Innovation mit System - Schutzgeräte mit Stecktechnik "de la Fa. ABB Schweiz AG, CMC Components Postfach CH-8048 Zurich / Switzerland. This Auxiliary switch is intended for mounting on a switch protection for a low voltage distributor constituted as plug socket system and contains a housing in the form of box. The housing receives two switching points that can be use as auxiliary contacts or signaling contacts, one of which it can be configured as opener and the other as closer, as well as an activation device that acts on the switching points and can be mechanically coupled with the protection switch After mounting on the distributor of low voltage, at least one of the switching points is part of a signaling current circuit, which indicates whether the point of Switching protection switch is open or closed. (use of auxiliary switch as auxiliary contact) or if the protection switch has been activated under electrical conditions (use of auxiliary switch as signaling contact). The signaling current circuit it is fed through an auxiliary busbar retained in the plug socket, which after the switch assembly auxiliary contacts a plug contact of the Auxiliary switch guided through the housing wall. A current signal formed through the position of the point of switching is conducted through a current passage performed as threaded connection to an alarm point provided outside the switch housing.

Representation of the invention

The invention, as indicated in the patent claims, has the task of creating a auxiliary switch of the type mentioned at the beginning, which can be easily mount in a low voltage distributor with a socket plug and can be disassembled comfortably again, in case necessary, outside the distributor.

In the auxiliary switch according to the invention, the contact device contains, instead of a plug contact, a contact plate aligned parallel to two side surfaces of its housing and that can be driven with pre-tension force, whose contact plate is housed from movable shape in the housing and has a first surface contact support provided outside the housing for the contact setting of a current busbar auxiliary retained in the socket of the low distributor tension. An auxiliary switch of this type can be mounted very easily and without much expense of force in the low distributor tension and can be disassembled again very easily out of it. This is mainly because the contact plate is retained. scrollable over a relatively large distance. TO difference of a contact arrangement with a contact of plug, relatively large forces acting from irregular shape during switch assembly and disassembly auxiliary outside the low voltage distributor. It ensures a electrical contact, sufficient for the function as a switch auxiliary, through the support of the contact plate on the bar auxiliary current collector. Therefore the switch auxiliary can also be mounted by non-assembly personnel experienced without adjusting expense of any kind in a way Fast and reliable at the dealer.

In general, the edge of the contact plate It consists of two guide edges aligned in the direction of push as well as by two connecting sections that connect, respectively, in the two guide edges and which are retained at distance from each other in the direction of thrust, and in a first section the first contact support surface is arranged mentioned and in the second joint section a second contact support surface received by the housing, which is supported on a contact rocker connected in a way electricity conductor with switching point. A auxiliary switch developed in this way can be manufactured easily and presents a good current transmission.

For the formation of the previous tension force  a spring is provided advantageously on the contact rocker and housed stationary in the housing. Through this spring a contact force is generated in two contact points, namely between the contact plate and the bar auxiliary current collector and between the contact plate and the contact rocker

To prevent a contact plate from falling outside the auxiliary switch, the contact plate is formed a hole for housing a security element. Do not However, to be able to disassemble, if necessary, the contact outside the auxiliary switch in a section of the board contact that is outside the housing is formed a finger grip

In a preferred embodiment of the auxiliary switch with a second switching point that can mount on a second signaling current circuit, which can be opened and closed by the activation device, the contact installation features a second contact plate that it can be driven with pre-tension force, whose plate of contact is planned for the contact of a second bar auxiliary current collector, held at a distance from the bar auxiliary current collector, low voltage distributor and it is configured and arranged similarly to the first board of contact, but rotated with respect to this plate 180º around the thrust direction and is housed in the housing, displaced to an isolation distance aligned perpendicular to the plane of the plate. This auxiliary switch can be contacted very easily with two auxiliary busbars. They can be grouped easily several auxiliary switches, which are associated with several protection switches, to form a single circuit of signaling current and in the current circuit formed of this way you can recognize the failure of one of the switches protection (collector alarm). Under configuration Asymmetric, for both contact plates only one Only type of plate.

In a preferred embodiment of the auxiliary switch, the contact installation has a body insulator retained in the housing with a separation wall arranged between the two contact plates. This insulating body is It can easily mount on the switch housing and fulfills function retention. The separation wall insulates the contact plates that drive different electrical potential from each other.

The contact installation can be fixed very easily in the switch housing when the insulating body It contains an edge fixed in the housing. This edge guarantees the same isolation distances on the switch auxiliary, retains and especially ensures power connections flexible configurations of signal current circuits and conducts the conduction of the two contact plates in thrust direction

Easy assembly and disassembly is possible of the connections of the current and of the contact plates because the edge presents on both sides of the wall of separation, respectively, two steps, in the first of which one of the two contact plates is guided and in the second one guided a current connection between this contact plate and the switching point associated with the first or second circuit Signaling.

You get a favorable cost accommodation of springs that generate the pre-tension force for both plates of contact through appendices that are arranged on both sides of the separation wall.

If on each of the two sides of the wall of separation is arranged, respectively, a deformable spring elastically perpendicular to the separation wall, then the two contact plates are easily secured against fall. With advantage, a spring is provided for conformation that collaborates with a hole in the contact plate Associated as a security element.

For technical safety reasons, the wall of separation, the edge and the springs are part of the body of isolating material.

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Brief description of the figures

With the help of the drawings explained in detail below an example of embodiment of the invention. In this case:

Figure 1 shows a view on an example of realization of an auxiliary switch according to the invention after removal of a semi-housing directed towards the observer.

Figure 2 shows in enlarged representation a switch contact installation according to figure 1.

Figure 3 shows a guided view in the direction of the arrow on a guided section along III - III through the contact installation according to figure 2.

Figure 4 shows a guided view in the direction of the arrow on a guided section along IV-IV through the contact installation according to Figure 3, and

Figure 5 shows in perspective view a insulating body of the contact installation according to figures 2 a Four.

Embodiment of the invention

In all figures, the same signs of Reference refers to equivalent parts. In figure 1 it represents an auxiliary switch 10. The auxiliary switch 10 is mounted on a low voltage distributor and contact two LA and LB auxiliary current busbars aligned perpendicular to the drawing plane. The switch contains a housing 20 essentially in the form of an insulating material box of polymer. This housing is configured in two parts and features two half-shells, whose half-shell directed towards the observer has been removed On two wide side switch surfaces auxiliary, aligned parallel to the drawing plane, you can assemble with the aid of connection means 21, 22 a switch of protection (which is below or above the plane of the drawing) or other auxiliary switch.

The auxiliary switch 10 has a activation device 30 that can be controlled by the protection switch The device 30 comprises triggers 31, 32 mechanically coupled with the protection switch as well as a switching lock 33 that can be released from the triggers and that retains a contact support 35, a system of switching lever 34 that can be activated manually and, given the case, a test key not shown. In the support of contact 35 two switching parts 41 A and 41 B are fixed, respectively, mobiles configured in each case as a bridge contact, which collaborate, respectively, with two pieces of stationary switching 42A and 43A or 42B and 43B under the formation of a switching point 40A and 40B, respectively.

The switching part 42A and 43A, respectively, of switching point 40A is connected of conductive form of electricity through a 51 A clamp with a power connection 50A guided through the housing 20 or either through a current connection not shown with a 52A current connection of the guided auxiliary switch of the same way through the housing 20. In the clamp 51 A is fixed a cable 61 A that establishes a current connection with a contact rocker 62A of a guided contact installation 60 also through the housing 20. The contact rocker 62A is supported on a contact surface 71 A, which points upwards and which is arranged inside the housing 20, of a contact plate 70A of the contact installation 60. A contact surface 72A of the contact plate 70A pointing down and which is arranged outside the housing 20 is supported  on the auxiliary current busbar LA. The force of support is applied through a spring 63A. As shown clearly, the contact plate 70A is aligned parallel to the two wide side surfaces of the housing 20 and is housed in the housing 20 movable under the action of spring 63A with force of previous tension. The contact plate 70A is delimited by two guide edges 74 and 75 that determine the thrust direction A body of insulating material 80 inserted in the housing 20 houses the contact plate 70A, the rocker arm of contact 62A, spring 63A and cable 61A.

In a similar way, the switching piece 42B or 43B is conductively connected to electricity through a clamp 51 B with a 50B power connection guided through the housing 20 or through a connection of current not shown with a 52B current connection of the auxiliary switch 10 also guided through the housing 20 and in the clamp 51 B a cable B is fixed, which establishes a power connection with another contact rocker of the contact installation 60 not shown in figure 1. The contact rocker not shown, covered through the body of insulating material 80 is supported in a manner corresponding to the contact rocker 62A on a contact surface, which points up and that is arranged inside the housing 20, of a contact plate 70B of the installation of contact 60. A contact surface 72B of the contact plate 70B, which points down and is arranged outside the housing 20, is supported on the current busbar auxiliary LB. The contact plate 70B is configured and arranged in a manner similar to the first contact plate 70a, but it is rotated 180º around the thrust direction in front of this plate and is housed in the housing 20 displaced to the extent of a insulation distance aligned perpendicular to the plane of the license plate. The contact surface 72A is arranged asymmetrically with respect to the guide edges 74, 75. Therefore, the two contact surfaces 72A and 72B are arranged displaced between Yes in horizontal direction. Through the proper selection of the asymmetry you can easily get a distance between the two contact surfaces, corresponding to the distance of the two busbars of auxiliary current LA and LB.

The auxiliary current busbar LA feeds through a contact plate 70A to a circuit of signaling current containing switching point 40A. Correspondingly, the auxiliary busbar LB feeds through a contact plate 70B to a circuit of signaling current containing switching point 40 B. The 50A and 50B current connections are unimportant when the auxiliary switch is mounted on a low distributor voltage, in which the auxiliary current busbars LA and LBs are retained in a socket. During assembly of the auxiliary switch in a low voltage distributor with a support rail, instead, the 50A and 50B power connections as well as additional means of connection enable the power supply through lanes LA and LB.

It follows from figure 2 that the body insulator has a separation wall 81 arranged between the two contact plates 70A, 70B as well as an edge 82, which fixes the insulating body 80 in retaining projections 23 of the housing 20. The edge 82 is mirror symmetrical on both sides of the wall of separation 81 and presents on each side of the separation wall two steps, of which only steps 83 and 84 arranged outside of the separation wall. Through step 83 the plate is guided contact 70A, through step 84, instead, the cable 61A that establishes the power connection between the board contact 70A and switching point 40A. In one way corresponding, the contact plate 70B and the cable 61 B are guided through the steps not shown at edge 82. In the Figure 2 also shows two appendices 85 arranged above of the separation wall 81 and guided at the edge 82, which they serve for the accommodation and guide of the dock 63A that generates the contact force In the parts of the contact plates 70A and 70B guided from the housing 20 are provided with grips for fingers 73A and 73B, respectively.

From figures 3 and 4 it can be deduced which on both sides of the separation wall 81 are arranged, respectively, two ribs 856A and 86B aligned in the direction of thrust of the contact plates 70A and 70B and a spring 87A and 87B which lies between the two ribs. The springs can be elastically deform perpendicularly to the separation wall 81 and present in each case a conformation 88A and 88B guided in a central hole 76A and 76B of the contact plate 70A and 70B. TO from figure 3 the parts can also be recognized associated to the contact plate 70B, not visible in figures 1 and 2, namely spring 63B and contact rocker 62B.

From the perspective representation of the body of insulating material 80 according to figure 5 can be recognized that the separation wall 81, the edge 82, the steps 83 and 84, the guide appendages for spring 63A, ribs 86A and 86B as well as spring 87A and spring 87B (not shown) are formed in the body of insulating material manufactured, for example, through injection casting.

In the manufacture of the switch 10, position the activation facility 30, the elements of fixing 21, 22, switching parts 41A to 43B, connections of current 50A to 52B with the current connections with the fixed switching parts, cables 61A and 62B fixed in the clamps 51A and 51B of the current connections as well as the contact rocker arms 62A, 62B, guided towards the installation of contact 60, in the middle of the housing 20 shown in the figure 2. Next, the insulating material body 80 is inserted into the housing 20 in such a way that it is retained with the edge 82 in the retention projections 23 in the housing 20. Cord 61 B and the contact clamp not shown connected to it as well as the spring not shown are inserted in this case in the body of insulating material 80. Next, the spring 63A is introduced, the cable 61 A and the contact rocker 62A in the material body insulator 80 and the housing 20 is closed through the application of the half shell not shown in figures 1 and 2.

Contact plates 70A and 70B can be Insert now from below into the housing. During insertion it elastically deforming springs 87A and 87B towards the wall of separation 81. If conformations 88A and 88B reach the holes 76A and 76B, then the springs expand and ensure this way the contact plates against fall.

Before mounting on the low distributor voltage is set the auxiliary switch with the help of fasteners 21, 22 in the protection switch. For him assembly plugs the construction group formed in this way on the socket that holds the auxiliary busbars lA and LB. In this case, the construction group is rotated around the shaft of the switch housing located on the part bottom left in figure 1. Contact plates 70A and 70B collide in this case with surfaces 72A and 72B on the two bars LA and LB auxiliary current collectors. 70A contact plates and 70B, which rest on the ribs 86A and 86B are displaced up now against the force of springs 63A and 63B in the body of insulating material 80 until the group of Construction is mechanically fixed in the socket. They form without wiring work of any kind, two current circuits signaling containing switching points 40A and 40B, respectively, in which current transitions are ensured defined from the auxiliary busbars LA and LB, respectively, on contact plates 70A and 70B, respectively, and from the contact plates on the rocker arms of contact 62A and 62B with a contact force determined by the springs 63A and 63B prestressed.

Contact installation 60 is arranged relatively tight on the axis of rotation. Therefore it is a relatively large angle of rotation is necessary to ensure a safe contact of the auxiliary current busbars. He large turning angle can be absorbed, however, without problems with the two contact plates 70A and 70B, since the contact plates are detachably held on a relatively large distance (guide edges 74 and 75). Instead, in a contact arrangement with a plug contact, they appear relatively large forces that act irregularly, the which significantly hinder the plug-in process and can lead, if necessary, to a deterioration of the auxiliary switch in improper mounting case.

If only one circuit is needed signaling fed through one of the busbars LA or LB auxiliaries, so this can easily be achieved at through the removal of one of the two contact plates. The plate to be removed, for example 70B, is fixed manually after disassembly of the construction group outside the plug socket in the finger grip 73B and stretches out of the housing 20 in against the retention force of spring 87B.

If power must be supplied through a auxiliary current busbar, for example LA, and must be detected through another auxiliary current busbar, for example LB, the signal emitted by switching point 40A and must be fed to the auxiliary current busbar LB, such as is desirable in the function of the installation as an alarm collector, then they are connected in a conductive way of electricity the two current connections 52A and 52B that act in another case, respectively, as signal output and the point of bridging is bridged 40B switching.

List of reference signs

10

Auxiliary switch

twenty

Case

21, 22

Connection means

2. 3

Retention overhangs

30

Activation device

31, 32

Trigger

33

Switching lock

3. 4

Toggle switching system

35

Contact support

40A, 40B

Switching points

41A, 41B

Mobile switching parts

42A, 42B, 43A, 43B

Fixed switching parts

50A, 50B, 52A, 52B

Current connections

51A, 51B

Clamp

60

Contact installation

61A, 61B

Cable

62A, 62B

Contact seesaw

63A, 63B

Springs

70A, 70B

Contact plates

71A, 72A, 72B

Contact surfaces

73A, 74B

Finger grips

74, 75

Guide Songs

76A, 76B

Holes

80

Insulating material body

81

Separation wall

82

Edge

83, 84

Steps

85

Guide Appendices

86A, 86B

Ribbing

87A, 87B

Springs

88A, 88B

Conformations

LA, LA

Auxiliary busbars

Claims (13)

1. Auxiliary switch for a distributor of low voltage that presents a first current busbar auxiliary (LA), which contains a housing (20) with two side surfaces aligned parallel to each other, an activation device (30) that can be controlled by a low distributor protection switch tension, at least a first switching point (40A) received by the housing (20), which can be opened or closed with the activation device (30) and that can be mounted on a first signaling current circuit indicating the status of switching of the protection switch and that is powered by the first auxiliary current busbar (LA), and at least two holes in the housing, one of which is configured as an installation (60) for the first auxiliary current busbar contact (THE), characterized in that the contact installation (60) contains a first contact plate (70A) aligned in parallel to the two lateral surfaces and which can be driven with a pre-tensioning force, which is movable in the housing (20) and which has a first contact support surface (72A) disposed outside the housing (20) for the contact of the first auxiliary current busbar (LA). 2. Auxiliary switch according to claim 1, characterized in that the edge of the first contact plate (70A) is formed by two guide edges (74, 75) aligned in the thrust direction as well as by two joining sections which they are connected, respectively, in the two guide edges (74, 75) and are kept at a distance from each other in the thrust direction, and because in a first joint section the first contact support surface (72A) is arranged and a second contact support surface (71A) received by the housing (20), which is supported on a contact rocker (62A) connected electrically with the first contact point ( 40A). 3. Auxiliary switch according to claim 2, characterized in that a spring (63A) supported on the contact rocker (62A) and stationary housed in the housing (20) is provided for the formation of the tension force. 4. Auxiliary switch according to one of claims 1 to 3, characterized in that a hole (76A) for housing a safety element (88A) is formed in the first contact plate (70A). 5. Auxiliary switch according to one of claims 1 to 4, characterized in that a finger grip (73A) is formed in a section of the first contact plate (70A) outside the housing. 6. Auxiliary switch according to one of claims 1 to 5 with a second switching point (40B) that can be mounted on a second signaling current circuit, which can be opened or closed or closed by the activation device ( 30), characterized in that the contact installation (60) has a second contact plate (70B) that can be driven with pre-tension force, which is provided for the contact of a second auxiliary current busbar (LB) of the distributor of low voltage, kept at a distance from the first auxiliary busbar (LA) and which is configured and arranged in a manner similar to the first contact plate (70A), but rotated with respect to this plate 180 ° around the thrust direction and is housed in the housing (20), displaced at an isolation distance aligned perpendicular to the plane of the plate. 7. Auxiliary switch according to claim 6, characterized in that the contact installation (60) has an insulating body (80) retained in the housing (20), with a separation wall (81) disposed between the first (70A) and the second contact plate (70B). 8. Auxiliary switch according to claim 7, characterized in that the insulating body (80) contains an edge (82) fixed in the housing (20). 9. Auxiliary switch according to claim 8, characterized in that the edge (82) has on both sides of the separation wall (81), respectively, two passages (83, 84), in the first (83) of which one of the two contact plates (70A, 70B) is guided and in the second (84) of which a current connection (62A, 62B) is guided between this contact plate and the switching point (40A, 40B) associated to the first or second signaling circuit. 10. Auxiliary switch according to one of claims 8 or 9, characterized in that on both sides of the separation wall are arranged in each case appendages (85) for the housing and for the spring guide (63A) that generates the previous tension force. 11. Auxiliary switch according to one of claims 7 to 10, characterized in that, on both sides of the separation wall (81), a spring (87A, 87B) elastically deformable perpendicularly to the separation wall (81) is disposed respectively. ). 12. Auxiliary switch according to claim 11, characterized in that in the spring (87A, 87B) a conformation (88A, 88B) is provided that collaborates with a hole (76A, 76B) of the contact plate (70A, 70B) Associated as a security element. 13. Auxiliary switch according to one of claims 11 or 12, characterized in that the separation wall (81), the edge (82) and the springs (87A, 87B) are part of the body of insulating material (80).