CN1153992A

CN1153992A - Control and signalling device for protective switching apparatus

Info

Publication number: CN1153992A
Application number: CN 96122792
Authority: CN
Inventors: 皮埃尔·杜克明
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 1995-09-28
Filing date: 1996-09-28
Publication date: 1997-07-09

Abstract

The present invention relates to a control and signalling device for a protective switching apparatus of the relay switch type which is provided with power switches and a protection assembly and is capable of detecting faults (overloads or overcurrents) on each current path associated with a switch, this device being actuated by a manual control member which can take an operating 'run' position corresponding to closed contacts, a 'stop' position corresponding to open contacts and a 'trip' position corresponding to the position after detection of a fault, characterised by the fact that it comprises a mobile spring loaded cam actuated by a triggering spring and capable of-from the 'run' position in which it is locked by an automatic interlock and after the triggering and release of the interlock of turning the manual control member which then actuates the coil switch.

Description

The control of protection switch equipment and signalling

The present invention relates to a kind of control and signalling that is used for protection switch; the control and a signal dress system that can detect the protective device of the fault (overcurrent or overload) on each current path that is associated with electrode particularly is equipped with; this device is by manual control element startup, and manual control element can be in " connection " position corresponding to closing contact, corresponding to " disconnection " position of opening the contact and corresponding to " separation " position that detects the later position of fault.

Cut off on switch or the relay switch at motor, control and signal element are called as interlock.

Motor cuts off switch or manual starter allows manual control electrode, perhaps by heat and magnetic trigger equipment that defencive function is provided electrode is controlled.When detecting fault on a certain phase line, the heat of corresponding phase or magnetic device just trigger opening of contact by shared interlock.The latter can also manually boot by a hand controller.

A relay switch is equipped with a contactor and a circuit breaker.It comprises that magnetic and/or heat trigger element and an electromagnet, and each utmost point of magnet control is to guarantee the contact function.Above-mentioned motor cuts off switch or manual starter comprises the device of its contact of similar startup, but does not have electromagnet.

Interlocking relay switch allows " connection " " disconnection " " separation " and reset function are controlled, it also the manual position of the control button by this interlocking to make the position of contact be visible.

Many interlocks are arranged, but they are generally all very complicated, expensive, volume is big and not easy to operate.

The purpose of this invention is to provide a kind of control and signalling, it is simple, reliable, quiet, cheap.The friction that it produces is little, does not need the operator to operate with very big strength.Not how are the size of tube apparatus or power, and it all provides operation stably.It can be directly installed on the equipment or away from it.And it can be used on the equipment of various different sizes.

Apparatus of the present invention comprise a movable control handle, it can be struck by starting the spring-loaded action of cam, cam can be after interlocking is triggered by device and discharges drives manual control handle from the position of its " RUN " that is locked by automatic interlocking device, and manually control handle is restarted coil switch.

Concrete characteristics are that spring-loaded cam and manual control handle both are operated by a rotation spring.

Below in conjunction with drawings and Examples the present invention is done more detailed explanation, wherein

Fig. 1 is the schematic diagram that the relay system switch of control of the present invention and signalling is housed;

Fig. 2 is that the II-II line along Fig. 1 cuts open the profile of getting;

Fig. 3 is that the III-III line along device cuts open the sectional view of getting;

Fig. 4 is that the IV-IV line along Fig. 2 cuts open the axial section of getting;

Fig. 5 and 6 expression apparatus of the present invention are in " disconnection " position (control button is removed respectively with on the throne);

Fig. 7 and 8 indication devices are in " connection " position;

Fig. 9 is in " separation " position with 10 indication devices;

Figure 11,12 variations when being in " disconnection ", " connection ", " separation " position with 13 indication devices;

Figure 14 represents the device away from the equipment installation of its control.

Control of the present invention and signalling 5 are fitted to all protection equipment as shown in Figure 1.This equipment is a relay system switch, and it comprises several polar contacts (pole contact) that can cut off the electric current on the current path, and the terminal of each current path is the binding post that is connected with electric wire.A single utmost point of double-break type only is shown, so that simplify accompanying drawing among Fig. 1.

Each utmost point comprises an armature contact bridge 1, and each armature contact and each fixed contact co-operation are to set up or to interrupt current path between each binding post.Each fixed contact is connected to each binding post, and external cable is connected in binding post by means of electric wire 2.

The contact bearing assembly 3 of one support contact carriage 1 slides in shell 7, perpendicular to the plane of each fixed contact.

Electromagnet 6 that is installed in the shell comprises the fixedly movable magnetic circuit and a coil of magnetic circuit, one and contact bearing assembly 3 mechanical connections, and the joint of coil is connected with power supply, and the power supply of coil is by coil switch 81 controls.The movable magnetic circuit of electromagnet is by a back-moving spring 61 biasing, and when coil no longer during excitation, back-moving spring moves on to open position (open the contact) with movable magnetic circuit and contact bearing assembly 3.

Protective device 4 is installed in the equipment, so as to detect with each current path that each utmost point is associated on any overload or overcurrent.

When this electric protective device 4 detected overcurrent or overload on a current path, it was just by installing opening of 5 each utmost point of control.This protective device 4 can be magnetic and/or heat or electronic type.

The device of representing in detail among Fig. 2-10 5 except that manual selection element 51, comprises that also a fluid spring loads cam 52.

Manually select element 51 between three main positions, to move: " RUN " or " connection " (closing of contact), " stopping " or " disconnection " (open the contact), " unclamping " or " separation " (opening) at the failure condition lower contact.

This device comprises switch (or contact) 81 and 82.Switch 81 is coil contacts (contactcoil).In the embodiment shown in Fig. 2-10, switch 82 is signalling contacts.As a kind of indication, microswitch can be used as

switch

81 and 82.

Cam 52 is spring-loaded, loads by the rotation spring 53 that on manual Option stage 51, rotates on the one hand, on the other hand, by startup spring 54 loadings of pressured holding plate (keeper plate) 71.

One end of rotation spring 53 is connected with spring-loaded cam 52 at 531 places, and the other end is connected with manual Option stage 51 at 532 places.

An end that starts spring 54 links to each other with spring-loaded cam 52 at 541 places, and the other end joins at 542 places and holding plate 71.

Spring-loaded cam 52 and automatic interlocking device 55 co-operations; automatic interlocking device 55 can be locked in cam 52 latched position (" connection " position among Fig. 7 and 8 or " disconnection " position among Fig. 5 and Fig. 6) or release cam 52 (when interlock starts by protective device 4), makes it to be in Fig. 9 and " separation " position shown in 10.Therefore, this interlock 55 can be fixed on spring-loaded cam 52 latched position (Fig. 5-8) by bar 523, and this latched position is corresponding with " connection " position or " disconnection " position, and " connection " or " disconnection " these positions are by control element 51 indications.

As an example, automatic interlocking device 55 can be an electromagnetic type, is made of a permanent magnet that is associated with trip coil.Spring-loaded cam 52 is provided with a magnetic material part 521 (with 523 adjacent), and it can be attracted by the permanent magnet of interlock 55.During release, the magnetic field of permanent magnet is unlocked the electromagnetic field counteracting that coil produces.

In addition, interlock 55 can be made of the lock bolt that an electricity is opened automatically.

In the embodiment shown in Fig. 2-10, control element 51 is one and centers on axle 511 knobs that are rotatably installed on the plate 71, thereby can between three main positions, pivot: " RUN " or " connection " (closing of contact), " stopping " or " disconnection " (open the contact), " unclamping " or " separation " (opening) at the failure condition lower contact.

Spring-loaded cam 52 is pivotably mounted on the plate 71 around axle 56.The pivot 56 of cam 52 is parallel and approaching with it with axle 511.In addition, the pivot 56 of cam can overlap with the pivot 511 of knob 51.

Spring-loaded cam 52 is by handgrip 522 starting switches 82.

In " disconnection " position (Fig. 5), knob 51 acts on coil switch 81 and opens it by means of its cam projection portion 513.In " connection " position, knob and cam projection portion 513 thereof be restart switch 81 not, thereby it is in off-position (Fig. 7).

When cam 52 is in its latched position (" connection " or " disconnection " position) (Fig. 5 and 7); it acts on signaling switch 82, in case spring-loaded cam 52 move towards " unclamping " positions, promptly; detect under the out of order situation at protective device 4, it just no longer acts on signaling switch 82.

Control element 51 is equipped with a link stopper 512, and operator's turn control element 51 just makes its rotation in case it connects cam 52.

Can pass through an additional mechanism providing additional operation force start power contactor.This mechanism comprises a pivot rods 91, and it drives and act on contact carriage 3 by knob 51.Bar 91 can rotate around axle 92.Rod end 93 is directed in the groove 514 of knob 51, thereby, depend on that the position of knob, bar are moved or current collector bridge 3 (position A or B) not.

Operation referring now to the device shown in the accompanying drawing key-drawing 2-10.

In " disconnection " position shown in Fig. 5 and 6, spring-loaded cam 52 is locked in latched position by automatic interlocking device 55.Start spring 54 pressurizeds.Coil switch 81 is opened.

In order to be transformed into " connection " (Fig. 7 and 8) from " disconnection " (Fig. 5 and 6), the operator will select knob 51 to forward " RUN " (or " connection ") to from " stopping " (or " disconnect).Spring-loaded cam 52 can not rotate by interlock 55.During rotating selection knob 51, the axle of spring 53 forwards opposite side to from the side of thrust line 532-56.In the terminal of its stroke, the closure of knob 51 trigger winding switches 81 (cam projection portion 513 breaks away from from the switch pusher).Then electromagnet 6 is provided with electric current, and contact bearing assembly 3 moves so that closed each utmost point.

In order to forward " stopping " to from " RUN ", aforesaid operations will be conversely.

Under failure condition (overload or short circuit), enabled instruction is provided by protective device 4, and sends to electromagnetic interlock device 55 by electric connection line.Thereby retracting spring loads cam 52, and it begins towards " unclamping " rotated position (direction f) shown in Fig. 9 and 10 by the thrust of spring 54.Rotation spring 53 was compressed in the initial period.At a time, the axle of spring 53 is crossed thrust line 532-56.Spring 53 makes knob 51 relative spring-loaded cams 52 along the direction rotation opposite with cam 52 direction of rotation by its turning effort.Knob 51 moves to " separation " position from the " RUN " position, as shown in Figures 9 and 10.During its rotation, knob 51 is opened switch 81 (by cam projection portion 513), cuts off the electric current that flows to coil.Simultaneously, the handgrip 522 of cam 52 is opened switch 81.Therefore, electromagnet 6 is opened and each utmost point is opened.

Be noted that the rotation enabling signal switch 82 of cam 52.

Knob 51 is stopped by block 512 relative to rotating finally of spring-loaded cam 52.Spring 53 final along the directive effect identical with spring 54 in cam 52.

In order to move to " stopping " position (Fig. 5 and 6) from " separation " position (Fig. 9 and 10), the operator is along the direction turn knob 51 opposite with f.Thus, by means of block 512, translating cam 52 turns back to its latched position, as Fig. 5, shown in 6.At the terminal point of stroke, automatic interlocking device 55 is locked in its latched position with spring-loaded cam 52, and knob 51 is in " stopping " position.

In order to move on to the " RUN " position from " separation " position, the operator carries out aforesaid operations, and further forwards knob 51 to the " RUN " position.

If during short circuit, the operator keeps knob 51 in the " RUN " position, and cam 52 will start and open switch 81 (see figure 9)s by its handgrip 522.

The difference of the device shown in Figure 11 to 13 and Fig. 2-10 shown devices is that the motion of its cam 52 and control element 51 is straight lines, and the motion of the same parts in the device is rotated shown in Fig. 2-10.But the class of operation of operation and whirligig seemingly.

In system shown in Figure 14, device 5 is away from the equipment 7 that electromagnet, switch and protective device are housed.This device can be installed on the door of electric box, and equipment 7 is installed in the back side of case.

Obviously, without departing from the present invention, various changes and improvement are feasible, and they have equal result of use.

As a kind of variation, a second switch can link to each other with first coil switch, and two switch series are connected on the coil power line, and this second switch starts in the handgrip 522 starting backs by cam 52.

As a kind of variation, can replace compression spring 53 with an extension spring in the device.

Claims

1; a kind ofly be used for signal and the control device that protection switch equipment particularly is equipped with protective device (4) that can detect the fault on each current path that is associated with electrode (1) and the relay of the switch (81) that is used for the control coil power supply; this control and signalling start by a manual control element (51); manual control element (51) is suitable for being in the " RUN " position corresponding to closing contact; corresponding to " stopping " position of opening the contact and corresponding to " separation " position that detects the later position of fault; it is characterized in that; it comprises one by the movable spring-loaded cam (52) that starts spring (54) biasing; cam can interlock (55) be triggered and unlocked after, driven manual control part (51) from it by the " RUN " position of automatic interlocking device (55) locking and make it actuating coil switch (81).

According to described control of claim 1 and signalling, it is characterized in that 2, cam (52) and manual control part (51) are setovered by rotation spring (53).

According to described signal of above-mentioned each claim and control device, it is characterized in that 3, an end of rotation spring (53) is connected with starting cam (52), and the other end of this spring locates to be connected in knob (51) in (532).

According to described control of above-mentioned each claim and signalling, it is characterized in that 4, an end that starts spring (54) links to each other with spring-loaded cam (52), and the other end links to each other with the plate (9) of device.

5, according to described control of above-mentioned each claim and signalling, it is characterized in that, comprise one or be used to signal or as the second switch of coil contact.

According to described control of above-mentioned each claim and signalling, it is characterized in that 6, automatic interlocking device (52) is an electromagnetic type, and constitute by a permanent magnet that is associated with trip coil.

7, according to described control of above-mentioned each claim and signalling, it is characterized in that, control assembly (51) is one and is installed in knob on the plate (9) around axle (511) rotation, thus can " RUN " " stop " and " separation " position between rotate.

8, connect according to described control of above-mentioned each claim and signalling, it is characterized in that, the axle (56) of spring-loaded cam (52) on mounting panel (9) rotates.

9, according to above-mentioned what described control of claim and signalling, it is characterized in that, knob (51) dispose one can actuating coil switch (81) cam play portion (513).

According to described control of above-mentioned each claim and signalling, it is characterized in that 10, spring-loaded cam (52) has one and is used for the handgrip (522) of actuating coil switch (81) and the bar (523) that is used for enabling signal switch (82).

According to described control of above-mentioned each claim and signalling, it is characterized in that 11, knob (51) is furnished with a block (512) that can rotation spring loads cam (52).

According to described control of above-mentioned each claim and signalling, it is characterized in that 12, it can be away from the equipment that electromagnet, switch and protective device are housed (7).