CN102237227A

CN102237227A - Power distribution device with a double interruption

Info

Publication number: CN102237227A
Application number: CN201110106123XA
Authority: CN
Inventors: G·尼韦纳
Original assignee: Asea Brown Boveri AB
Current assignee: ABB Technology AG
Priority date: 2010-04-21
Filing date: 2011-04-11
Publication date: 2011-11-09
Anticipated expiration: 2031-04-11
Also published as: EP2381460A1; CN102237227B; DE102010017900A1; EP2381460B1

Abstract

The invention relates to a power distribution device (1), which is provided with at least an electrode current path (2), comprising two static contacts (5, 6) and two movable contacts (8, 9) disposed on a movable contact bridge (7), via the contacts, an electrode switch provided with two contact points and a double interruption is formed, wherein via loading of a contact bridge (7)by a pusher (12) in an opening direction (O) and by a contact pressure spring (11) in a closed direction (S), the device is also provided with an electromagnetic trigger (13) whose striker armature strikes a contact bridge (7) during occurrence of short-circuit by a pusher (12) in a direction of an opening (O) and unlatches a latch point of a switch latch (15). Therefore, the switch latch (15) is made to continuously overcome active force of the contact pressure spring (11) and intermittently load the contact bridge (7) via loading of an actuating rod (17) of the pusher (12). A buffering part is disposed in part of movement locus (which the contact bridge passes by after hit) of the contact bridge (7), therefore, the contact bridge or the pusher (12)is made to be effectively connected with the buffering part after hit of the contact bridge (7), therefore, motion of the contact bridge is buffered after hit.

Description

Controller switching equipment with double-break

Technical field

The present invention relates to a kind of as claim 1 controller switching equipment with double-break (Doppelunterbrechung) as described in the preamble

Background technology

This controller switching equipment (for example engine protection switch) has at least one electrode current path (Polstrompfad); comprise two static contacts and two contacts that touch the activity on the bridge that are arranged on activity, form utmost point switch with two contacts and double-break by their.At this, touch bridge opening on the direction and on closing direction, load by contact stage clip (Kontaktdruckfeder) by button (Dr ü cker).

This controller switching equipment also comprises magnetictrip Not only opening to load on the direction when its armature (Anker) produces short circuit current in the electrode current path and touching bridge by button, and discharge the cohesive position that break-make is locked (Schaltschloss), make the break-make lock touch bridge thus by the active force disconnection ground loading that actuating rod overcomes the contact stage clip constantly.

Directly after collision is touched bridge and interrupted short circuit current in the electrode current path thus, electrodynamic recoil of magnetictrip is interrupted together, and made and touch the active force of bridge by the contact stage clip and on the direction of its make position, load again.

Compare with the system inertia that comprises armature and button, because the machinery inertial of break-make lock is bigger, actuating rod lags behind by key motion, and this actuating rod is used for by the break-make lock contact being stayed open.

May occur under worst condition, before the break-make lock can be realized continuing to open by actuating rod and button, the contact was closed once more by the contact stage clip.This is referred to as to occur contact bounce, and this does not expect.

Described a controller switching equipment with double-break in DE 10 2,006 055 007 A1, wherein avoided contact bounce in the following manner, promptly used the button of two bodies, had a push rod, it moves in slide block and it is ahead of slide block movement.This solution mechanically is complicated and can not assembles simply.

Summary of the invention

Therefore the objective of the invention is, a kind of controller switching equipment of above-mentioned form is provided, it is when interrupting breaking current and avoiding having improved dynamic characteristic under the situation of contact bounce, and wherein mechanical structure wants simple.

This purpose is achieved by the controller switching equipment with the described feature of claim 1 characteristic according to the present invention.

According to the present invention, buffer unit is set touching in the componental movement track of bridge (touch bridge after collision through this componental movement track), after bridge is touched in collision, make thus and touch bridge or button and produce function with buffer unit and be connected, and the motion of touching bridge is slowed down after collision.

By preventing according to structure of the present invention, before realizing reliably opening by for example actuating rod, by button and touch contact that bridge forms open system after opening by button under the situation of short circuit closure once more.Be according to advantageous effect of the present invention, after opening contact position, relevant parts (be button or touch bridge) remove many kinetic energy and convert heat to by friction by buffer unit, make return movement slow down, so that actuating rod has time enough and occupies its final position, in this position actuating rod can guarantee contact position continue open.

According to another advantageous embodiments of the present invention, described buffer unit comprises the material bodies of being made by elastomeric material (for example elastomer).

According to advantageous embodiment of the present invention, described buffer unit comprises the Buffer Unit of fluid, for example form by piston and cylinder, have a structure of small air gap therebetween.

According to another advantageous embodiments of the present invention, described buffer unit is provided with like this, makes it producing before function is connected with touching bridge, and it at first is connected with button generation function.

According to another advantageous embodiments of the present invention, described buffer unit is provided with like this, and it can produced before function is connected with button, make it at first with touch bridge generation function and be connected.

Description of drawings

By means of the accompanying drawing that two embodiment of the present invention are shown, explain and describe the present invention and other favourable expansion structure and improvement of the present invention in detail.In the accompanying drawing:

Fig. 1 illustrates the function diagram according to controller switching equipment of the present invention, and it has according to buffer unit of the present invention, and it is provided with like this, can produce before function is connected with touching bridge at it, and it at first is connected with button generation function;

Fig. 2 illustrates the function diagram according to controller switching equipment of the present invention, and it has according to buffer unit of the present invention, and it is provided with like this, can produce before function is connected with button at it, make it at first with touch bridge and produce function and be connected.

In the accompanying drawings, parts identical or identical function or assembly are represented with identical reference marker respectively.

List of numerals:

1 controller switching equipment

2 electrode current paths

3 input terminals

4 lead-out terminals

5,6 static contacts

7 activities touch bridge

The contact of 8,9 activities

10 contact positions

11 contact stage clips

12 buttons

13 magnetictrips

14 positions

15 break-makes lock

16 positions

17 actuating rods

18 positions

30 buffer units

30 ' buffer unit

30 " buffer unit

32 wall bodies

113 thermal overload releases

114 positions

171 first lever arms

172 second lever arms

173 rotations

Embodiment

Fig. 1 illustrates according to controller switching equipment 1 of the present invention, and it has the electrode current path 2 between input terminal 3 and lead-out terminal 4.It can be the electrode current path of three utmost point motor protection switches for example, and its two electrode current paths in addition correspondingly constitute.

This electrode current path 2 comprises two

static contacts

5,6 and two contacts that touch the activity on the bridge 78,9 that are arranged on activity, forms the contact position 10 with double-break by their.The described bridge 7 that touches loads by contact stage clip 11 (square to arrow S) on closing direction.Can make by button 12 and to touch bridge and load opening on the direction (square) to arrow O, these button 12 interlockings with contact stage clip 11 opposed touching on bridge 7 one sides.

Described electrode current path 2 also comprises thermal overload release 113 and has the magnetictrip 13 of armature, when producing short circuit current in electrode current path 2, this armature touches bridge 7, by position 14 expressions because electrodynamic recoil is opening to load on the direction by button 12.Simultaneously, the armature of magnetictrip 13 also acts on break-make lock 15 and discharges its cohesive position under short-circuit conditions, by position 16 expressions, make break-make lock 15 under release condition, touch opening of bridge 7 constantly thus and load button 12 on the direction by actuating rod 17 (by position 18 expressions).

Same purpose is in break-make lock 15 (by position 114 expressions) under the situation of overcurrent for thermal overload release 113, and its function is known on principle, and this is not a content of the present invention.Just show thermal overload release 113 here together for integrality.

The mechanical system that comprises break-make lock 15 and actuating rod 17 can be to have the curved bar system that two-stage is connected.Actuating rod 17 is made of double armed lever, its first lever arms 171 that load by break-make lock 15 and it form obtuse angles each other with button 12 coefficient second lever arms 172, and can be rotated to support in the rotation 173 of fixed-site, make actuating rod 17 play the effect of deflecting bar thus.

Described mechanical system has certain machinery inertial, runs into button 12 at actuating rod 17 thus, so as constantly open on the direction load button before, after discharging, pass the regular hour, for example 2ms.

In contrast to this, directly run into the time much shorter that touches bridge 7 by the armature of magnetictrip 13, it for example is 1ms.

Thus, when not taking other measure, contingently be, the free end of actuating rod 17 by its second lever arm 171 constantly open position load button and load thus touch bridge 7 before, touch bridge 7 has just been got back to its initial position again owing to the reset force of contact stage clip 11 by roof pressure make position, and make contact position 10 closures thus again.

The measure of taking according to of the present invention is described below, is used to prevent this point.

At first observe Fig. 1.In the movement locus (button is being opened contact position this track of process on direction of arrow O later on) of button 12, settle the buffer unit 30 of the square materials bodily form formula of making by elastomeric material (for example elastomer).At this, this buffer unit 30 is placed on the outer casing underpart spare, represents by the wall body with reference marker 32.The size of design buffer unit makes it find the position in the inner chamber of contact stage clip 11 like this.When running into when touching bridge, button 12 is impacted downwards on direction of arrow O.Button is run into buffer unit 30, and button is removed many kinetic energy and converts heat to by the internal friction in the buffer unit 30 there, and its recoil that makes progress on direction of arrow S is again slowed down.Thus the contact that touches the activity on the bridge may be again with before static contact contacts, produce time enough and be used to discharge on off mechanism, and produce time enough and be used to make actuating rod to compress button 12 constantly.Avoid contact bounce with simple mechanical structure thus.

By means of the material bodies of making by elastomeric material, embodiment is described.But the present invention is not limited to such embodiment, but the present invention can comprise the buffer unit structure that all it is contemplated that.

Fig. 2 illustrates one embodiment of the present of invention, wherein in the right side and the left side of contact stage clip 11 two buffer units 30 ', 30 is set ", they constitute similarly in others and the buffer unit 30 in Fig. 1 embodiment.Design buffer unit 30 ', 30 like this " size, touch bridge when bridge and button 12 move downward and at first run into buffer unit 30 ', 30 touching ".Other function is corresponding to the embodiment according to Fig. 1.At buffer unit 30 ' and 30 " be under the situation of elastic materials; it also can be the ring of being made by elastomeric material in another embodiment; it is provided with around contact stage clip 11, therefore the elastomer 30 ' and 30 in Fig. 2 " corresponding to the cross-sectional area of this elastic ring.

Claims

1. a controller switching equipment (1), it has at least one electrode current path (2), comprise two static contacts (5,6) and two be arranged on the movable contacts (8 that touch the activity on the bridge (7), 9), form utmost point switch by them with two contacts and double-break, wherein opening that direction (O) goes up and going up loading by contact stage clip (11) at closing direction (S) and touch bridge (7) by button (12), described controller switching equipment (1) has magnetictrip (13), its impact armature is not only gone up collision and is touched bridge (7) opening direction (O) by button (12) under short-circuit conditions, and the cohesive position of release break-make lock (15), making break-make lock (15) overcome the active force that contacts stage clip (11) constantly by the actuating rod (17) that button (12) is loaded thus loads with opening and touches bridge (7), it is characterized in that, touch bridge (7) in the collision after through that part of movement locus in buffer unit (30 is set, 30 ', 30 "); after bridge (7) is touched in collision, make thus and touch bridge or button (12) and buffer unit (30; 30 '; 30 ") and produce function and connect, and therefore the motion of touching bridge is slowed down after collision.

2. controller switching equipment as claimed in claim 1 (1) is characterized in that, described buffer unit (30,30 ', 30 ") comprises the material bodies of being made by elastomeric material.

3. controller switching equipment as claimed in claim 1 (1) is characterized in that, described buffer unit (30,30 ', 30 ") comprises the Buffer Unit of fluid.

4. controller switching equipment as claimed in claim 1 (1) is characterized in that, described buffer unit (30,30 ', 30 ") is arranged to, and makes it producing before function is connected with touching bridge (7), can at first be connected with button (12) generation function.

5. controller switching equipment as claimed in claim 1 (1) is characterized in that, described buffer unit (30,30 ', 30 ") is provided with, and it is being produced before function is connected with button (12), can be at first with touch bridge (7) generation function and be connected.