CN102290295A

CN102290295A - Auxiliary trip device designed to be associated with circuit breaker unit

Info

Publication number: CN102290295A
Application number: CN2011101592296A
Authority: CN
Inventors: Y.贝林; M.塞居恩
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 2010-06-15
Filing date: 2011-06-14
Publication date: 2011-12-21
Anticipated expiration: 2031-06-14
Also published as: EP2398034A1; CN102290295B; FR2961343A1; FR2961343B1; ES2409304T3; EP2398034B1

Abstract

The invention relates to an auxiliary trip device, which is capable of being connected to a circuit breaker unit, the auxiliary trip device comprises an operation mechanism (2) provided with a trip chaining designed to be effecting upon a trip latch of the circuit breaker unit, the mechanism is pressed bias toward a stop position via a handle (11) overcoming a return spring (13) named as a first spring, the first spring drives a supporting plate to an open position of a contact under the condition of trip; an electromagnetic iron (3) provided with an excitation coil (4) and a magnetic path, the magnetic path is provided with a moving armature, the armature and a trip rod (7) are in a matched operation; and a device used for pressing bias the armature to a first position after trip, the device comprises an arm (8a) supported by the supporting plate. The auxiliary trip device is characterized by comprising an extra spring (15) named as a third spring, the extra spring (15) is tensioned to a close position of the device by the arm (8a) of the supporting plate (8), after unlocking of the supporting plate, the spring (15) named as a third spring can apply force upon the arm of the supporting plate during release, so as to press bias a switch blade (6) to the second position close to a magnetic path (5).

Description

Be designed to the auxiliary tripping device that is associated with breaker unit

Technical field

The present invention relates to a kind of auxiliary tripping device that is contained in the modular insulation housing, this modular insulation housing can be connected on the breaker unit, described trip gear comprises operating mechanism, this operating mechanism has the link of dropout, this dropout link design becomes to act on the dropout pallet of breaker unit, described mechanism comprises the drive link that is connected on the handle, rotation is engaged in the housing and has the supporting bracket of the mechanical linkages that can disconnect with drive link, and by the release lever of magnet control to cause mechanical linkages to disconnect, under situation about breaking down, cause mechanism to thread off automatically, and it is irrelevant with the actuating of the dropout pallet of handle and the breaker unit that is associated, under the dropout situation, described mechanism is overcome the back-moving spring that is called first spring by handle and is biased into loading position, described first spring is designed to drive the unlocked position of supporting bracket to circuit breaker, electromagnet is provided with excitation coil and is provided with magnetic circuit, it has mobile armature, this mobile armature can occupy the primary importance or the second place, in this primary importance, because being called the effect armature and the magnetic circuit of the back-moving spring of second spring separates, in this second place, armature is pulled to magnetic circuit by electromagnetic attraction when coil stimulating takes place, described armature is cooperated with above-mentioned release lever, and be used for after dropout the device of armature bias voltage to the second place, these devices comprise the arm that is supported by supporting bracket.

Background technology

If the purpose of low pressure servicing unit is to compare when low with its rated value or when the voltage of its terminal cuts off owing to promptly opening circuit, circuit breaker is opened at power system voltage.Electromagnet is held and powers up.In the time of under voltage drops to predetermined threshold, electromagnet is de-energized and activates before the release lever of the mechanism that is loaded by handle.Before magnet spool was powered up once more, when auxiliary body threaded off, electromagnet was by mechanical de-energisation.The air gap of magnetic circuit is reduced to zero restriction makes plug-in strip cling (stick) required electric current, limit temperature raises thus.

Normally main spring on the plug-in strip carries out by acting on by arm in the de-energisation of electromagnet, and arm is arranged on the supporting bracket for this purpose, and this de-energisation consumes the part energy that mechanism provides, and carries out opening of the breaker unit that is associated.Because supporting bracket is pressed on the plug-in strip with the closed latter is again slackened, this plug-in strip is relative with its power of opening spring with the coupling of resistance (resistive) characteristic of the stroke/power drive characteristic of servicing unit and circuit breaker.

Summary of the invention

The invention provides a kind of solution of this problem, and propose a kind of auxiliary tripping device of simple designs, it can make the slackening of stroke/force characteristic of mechanism be compensated, and does not damage the performance of servicing unit.

For this purpose, the device that the purpose of this invention is to provide a kind of the above-mentioned type, this device is characterised in that it comprises the spring that is called the 3rd spring, arm tension at the supported plate of this spring of loading position of mechanism, the described spring that is called the 3rd spring can apply power on the arm of supporting bracket when it discharges, after the locking of supporting bracket has discharged, so that plug-in strip is turned back to the said second position of close magnetic circuit.

According to another feature, being called the spring of the 3rd spring and the arm of supporting bracket forms and is arranged to when threading off beginning, the direction that is applied to the starting force on the arm of supporting bracket make on the arm that is delivered to supporting bracket moment a little less than, in release along with spring, in the process that arm moves, the direction of the power of the spring on arm changes, make the moment that when the spring that is called first spring no longer is enough to provide minimum actuating force simultaneously, is delivered to arm be exaggerated in the interstage, and the moment that when thread off finishing, is delivered to arm a little less than, wherein, described minimum actuating force be used for the dropout pallet of release circuit breaker required and to be used to reload magnetic circuit required.

According to another feature, the spring that is called the 3rd spring is a torsionspring.

According to another feature, the loading position that the spring that is called the 3rd spring is included in mechanism is pressed in the end on the housing and is pressed in end on the arm of supporting bracket, two ends of spring are crushed on the housing in the dropout position of mechanism, when take place threading off or handle when being placed on position of rest, the motion by supporting bracket causes the pressure point of the second end of spring from being pressed in position on the arm to the variation that is pressed in the position on the housing.

According to another feature, described trip gear is the low pressure trip device.

Description of drawings

The clearer understanding but other advantages of the present invention and feature will become from the detailed description that only purpose provides for example with reference to the accompanying drawings, among the figure:

Fig. 1 is the front view of inside that the auxiliary tripping device of the specific implementations according to the present invention is shown, and described device is in closure and loading position, and described magnetic circuit is closed;

Fig. 2 is the plane graph that the figure with respect to the front sees from behind, the mechanism of device only is shown and at the magnetic circuit of same position;

Fig. 3 is figure identical with Fig. 1 when threading off beginning, and magnetic circuit is in the opening procedure;

Fig. 3 a is the partial view of Fig. 3, and the dropout of mechanism is shown;

Fig. 4 is at the figure identical with Fig. 2 corresponding to the position of the device of Fig. 3;

Fig. 5 is the figure identical with Fig. 1 after device is threaded off, be with Fig. 3 ratio device position of carrying out more forward mutually, the still closed still mechanism of handle is in the process that resets;

Fig. 6 is at the figure identical with Fig. 2 corresponding to the position of the device of Fig. 5;

Fig. 7 is the figure identical with Fig. 1 of position of rest place of device after dropout, and handle is opened;

Fig. 8 is at the position corresponding to the device of Fig. 7, the figure identical with Fig. 2;

Fig. 9 is the figure identical with Fig. 7, and supporting bracket is removed; And

Figure 10 is the perspective view of front view.

Embodiment

In the drawings, can see auxiliary tripping device D, especially the low pressure releasing device of the specific implementations according to the present invention, it is contained in the modular insulation housing 1, be designed to be connected on the breaker unit (not shown), described trip gear mainly comprises operating mechanism 2 and electromagnet 3.This operating mechanism 2 has the dropout link on the dropout pallet that is designed to act on the breaker unit that is associated.This electromagnet 3 is equipped with excitation coil 4 and is equipped with magnetic circuit 5, has mobile armature 6, this armature 6 can occupy the primary importance or the second place, in primary importance, this armature and magnetic circuit are separated, and are the positions that described armature is called as back-moving spring 12 bias voltages of second spring, and the described second place is near described magnetic circuit, when coil stimulating took place, the power that described armature overcomes described spring was spurred by electromagnetic attraction.

Electromagnet 3 comprises magnetic circuit with known manner, and this magnetic circuit is formed by magnetic U-shaped spare 5, and this magnetic U-shaped spare is made by ferromagnetic steel, and with the operation synergistically mutually of pivot plug-in strip 6 formed mobile armatures, this electromagnet 3 also comprises the coil 4 that is supported by insulation crust.

In known manner, operating mechanism 2 comprises release lever 7, and these release lever 7 rotations are installed on the rotation supporting bracket 8.This supporting bracket 8 also comprises on the one hand and release lever 7 cooperations and the deadlock lever 9 of cooperating mutually with the drive link 10 that is connected to reseting handle 11 on the other hand.Bar 10 acts on the supporting bracket 8 via deadlock lever 9, and this deadlock lever 9 is by release lever 7 lockings.When taking place to thread off, the spring 13 that moment of torsion is called as first spring is delivered to supporting bracket 8, and this first spring 13 is resetted by handle in each back of threading off.When the supporting bracket 8 of mechanism and the locking between the bar 10 are discharged by release lever 7, the energy delivery of storage was to supporting bracket 8 when this spring 13 will reset thus at first, this causes the pallet of breaker unit to be unlocked, and opens the contact of the breaker unit that is associated thus.It is nonsynchronous with returning of supporting bracket 8 and bar 7 that handle 11, bar 10 and deadlock lever 9 turn back to open position.

According to the present invention, this supporting bracket 8 also comprises arm 8a, arm 8a is designed to cooperate with torsionspring 15, under the not stress state of mechanism, described spring is through two

relative end

15a, 15b compressed fit, and described two ends are respectively on two parts of device case, and after threading off by the motion of supporting bracket, end 15b is pressed on the arm 8a of supporting bracket 8, so that apply enough power on supporting bracket 8 after threading off, so that plug-in strip 6 is turned back to above-mentioned primary importance.

Fig. 1 and 2 is illustrated in the trip gear under the holding state, and wherein, magnet spool 4 is powered, and mechanism 2 is loaded and breaker unit is in the close position.Plug-in strip 6 forever is attracted to such position, and in this position, it is resisted against on the magnetic U-shaped spare 5, and the actuator lever 16 that is associated with plug-in strip 6 do not act on the release lever 7, this release lever 7 with mechanism's 2 Active Lockings at stress state.Under this position, the 15a of extra spring 15 in two 15a of branch, 16b be pressed in housing 1 all-in-one-piece pillar on, and be pressed on the arm 8a of supporting bracket 8 through another 15b in its branch, the arm 8a of supporting bracket 8 remains on loading position with this spring 15, and this is because the effect of the locking that release lever 7 is carried out between handle 11, bar 10 and deadlock lever 9.Therefore this extra spring 15 is tightened to the loading position of main spring 13 by arm 8a.In this position, the direction that is applied to the starting force F on the arm 8a of supporting bracket makes that the moment that is delivered on the arm by extra spring 15 is more weak, represented as by between the distance d1/d2 than small scale, this apart from d1 and d2 be the direction D1 that separates above-mentioned power, the distance of line D3 of passing the jointed shaft X of supporting bracket and being parallel to the direction D2 of above-mentioned line D1 and being parallel to aforementioned two lines and passing the rotating shaft of spring 15.

In Fig. 3, exist voltage failure to cause magnetic circuit 5 to be opened at the terminal place of coil 4, mobile in the clockwise direction thus plug-in strip 6.In this motion process, the actuator lever 16 that is associated with plug-in strip 6 is driven and rotation in the same direction, and is positioned at end 16a actuation trip bar 7 on the plug-in strip opposite side through it.The latter's motion causes the release of deadlock lever 9, and shown in Fig. 3 a, this has effect owing to above-mentioned main spring 13 makes the result that supporting bracket 8 and bar 7 begin to rotate.This motion causes release and the contact of the breaker unit that therefore causes being associated is opened.Position at device shown in Figure 3, this position to be corresponding to the beginning of threading off, and is delivered to identical in the position among the moment of mechanism and the figure formerly by extra spring 15, so that do not change outside tripping characteristic, as represented by distance d1, it equates in Fig. 2 and 4.

In Fig. 5 and 6, the dropout process is in the key point place, and main spring 13 has transmitted its most of energy, and arm 8a self and actuator lever 16 are interfered, the counterwork of actuator lever 16 experience springs 12.This moment, acting on the supporting bracket 8 of additional springs 15 produces its maximum moment, this in Fig. 6 by the direction D1 of power F, pass the rotating shaft X of supporting bracket and d1 '/d2 ' of being parallel to the direction D2 of D1 and passing the bigger ratio between the direction D3 of axle of spring 15 represents.In this position, the energy loss that extra moment counterbalance spring 12 compressions that spring 15 is transmitted bring.

By this way, though spring 15 discharges very for a short time in the process in stage of threading off, be tending towards making its effect maximum constantly at the most critical of dropout process at the ratio of its main shaft, its length d 1 '/d2 ' between the rotating shaft of the point of application on the supporting bracket 8 and supporting bracket 8.

In Fig. 5 and 6, handle 11 still is in the close position, and the latter is in the process that turns back to corresponding to the position of open position, shown in Fig. 7 to 8 with bar 10.

At the end of the rotating distance of supporting bracket 8, the moment that additional springs 15 is transmitted begins to reduce, and till it reduced at the end of plug-in strip stroke, coil 4 (if having rated current to flow through it once more) can attract plug-in strip 6 to keep the position of magnetic circuit closure.

In Fig. 7 to 10, this device is shown in an open position, and the contact of breaker unit is opened.In this position, additional springs 15 is in pre-stressed state, and two

terminal

15a, 15b are pressed in respectively on two parts of housing.Open in the process of motion in supporting bracket, in fact arm moves downward, and this causes the pressure point of the second terminal 15b of additional springs 15 to move to the position that it is pressed in (Fig. 9) on the housing from the position that it is pressed on the arm.

In this stage, the closure of contact of breaker is allowed to, and by actuation handle 11 to the opposite side shown in Fig. 7 to 10, the resetting of main spring 13.When electromagnet no longer has enough electric currents when keeping magnetic circuit closed once more, the actuating force of the spring that accumulates in reseting procedure will discharge once more.

Therefore according to the present invention, torsionspring applies moment on the arm of supporting bracket, as supplying of the main spring of mechanism supports plate.

The geometry of arm and the geometry of additional springs and the arrangement form of the two make open stroke begin to be delivered on the mechanism supports plate extra moment a little less than, therefore so that do not change and do not disturb or reduce outside tripping characteristic, stronger when the main spring motion of confirming is more weak, and when finishing a little less than.

The energy that is delivered to the moment on the supporting bracket and therefore provides at main spring by torsionspring becomes maximum when the required minimum actuating force of the required minimum actuating force of release breaker unit and the magnetic circuit that resets no longer enough is provided simultaneously.When the resistance of plug-in strip is maximum, the energy supplement maximum.

Change hardly thus to power/kinetic characteristic that circuit breaker provides by this mechanism.

Realized thus that according to auxiliary tripping device of the present invention the magnetic circuit of electromagnet is can machinery closed once more thus, with the required magnitude of current of restriction plug-in strip magnetic bonding, power/kinetic characteristic that mechanism provided only changes very little.

Realize the compensation of actuating force loss thus, and do not damaged the ability of auxiliary body's coupling circuit breaker.The required power of this mechanism of threading off is directly linked to the driving moment of main spring.

It is compatible that all common parts and other servicing units keep.According to the characteristic of the servicing unit that will be engaged, just add or do not add additional springs.By pulling down this spring, identical mechanism can for example be used for long-range trip unit.Should be noted that though described execution mode relates to low pressure auxiliary tripping device, the present invention also can be applied to any auxiliary tripping device, wherein must turn back to its position at the dropout back switch blade.

The present invention is in no way limited to describe and illustrated execution mode naturally, and the latter only provides with the purpose of giving an example.

On the contrary, the present invention extends to all technical equivalents that contain institute's tracing device and their combination, as long as their marrow according to the present invention is realized.

Claims

1. auxiliary tripping device, it is contained in the modular insulation housing, can be connected on the breaker unit, and described trip gear comprises:

Operating mechanism, this operating mechanism has the link of dropout, this dropout link design becomes to act on the dropout pallet of breaker unit, described mechanism comprises the drive link that is connected to handle, rotation is engaged in the housing and has the supporting bracket of the mechanical linkages that can disconnect with drive link, and release lever, this release lever is by magnet control, with under the situation of fault, cause described mechanical linkages to disconnect, cause mechanism to thread off automatically, and it is independent mutually with the actuating of the handle and the dropout pallet of the breaker unit that is associated, described mechanism by handle overcome be called first spring the back-moving spring bias voltage to loading position, described first spring is designed to drive the unlocked position of supporting bracket to breaker unit under the situation of threading off

Electromagnet, this electromagnet is provided with excitation coil and has magnetic circuit, this magnetic circuit has mobile armature, and this armature can occupy any in the primary importance and the second place, in primary importance, because being called this armature of effect of the back-moving spring of second spring separates with magnetic circuit, in the second place, when coil stimulating took place, armature was pulled to magnetic circuit by electromagnetic attraction, described armature is cooperated with above-mentioned release lever

Be used for after dropout the device of armature bias voltage to the second place, these devices comprise the arm that described supporting bracket supports,

It is characterized in that, it comprises the spring (15) that is called the 3rd spring, arm (8a) tensioning at the supported plate of loading position the 3rd spring (8) of mechanism, after the locking of supporting bracket has discharged, the described spring (15) that is called the 3rd spring can apply power on the arm of supporting bracket when it discharges, so that with the said second position of plug-in strip (6) bias voltage to close magnetic circuit (5).

2. auxiliary tripping device as claimed in claim 1, it is characterized in that, being called the spring (15) of the 3rd spring and the arm (8a) of supporting bracket (8) forms and is arranged to when threading off beginning, the direction that is applied to the starting force F on the arm (8a) of supporting bracket (8) for make on the arm that is delivered to supporting bracket moment a little less than, in the process that arm moves along with the release of spring (15), the spring that is called first spring no longer enough provide simultaneously breaker unit the dropout pallet release and when reloading the required minimum actuating force of magnetic circuit, change in the direction of the power of the spring on the arm and to make the moment that is delivered on the arm be exaggerated in the interstage, and thread off be delivered to when finishing on the arm moment a little less than.

3. auxiliary tripping device as claimed in claim 1 is characterized in that, the spring (15) that is called the 3rd spring is a torsionspring.

4. auxiliary tripping device as claimed in claim 3, it is characterized in that, the spring (15) that is called the 3rd spring comprises the end (8b) on end (15a) that is pressed on the housing (1) and the arm (8a) that is pressed in supporting bracket (8) at the loading position of mechanism, two ends (15a, 15b) of spring (15) are pressed on the housing (1) in the dropout position of mechanism, the pressure point of second end (15b) of spring from the variation that is pressed in the position of position on being pressed in housing (1) on the arm (8a) when taking place to thread off or handle when being placed in position of rest the motion of supporting bracket caused.

5. as each described auxiliary tripping device in the above-mentioned claim, it is characterized in that described trip gear is the low pressure trip device.