CN100341216C - Safety interlock system for circuit breaker - Google Patents

Safety interlock system for circuit breaker Download PDF

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Publication number
CN100341216C
CN100341216C CNB2004100426655A CN200410042665A CN100341216C CN 100341216 C CN100341216 C CN 100341216C CN B2004100426655 A CNB2004100426655 A CN B2004100426655A CN 200410042665 A CN200410042665 A CN 200410042665A CN 100341216 C CN100341216 C CN 100341216C
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CN
China
Prior art keywords
breaker
latch
circuit
pull
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB2004100426655A
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Chinese (zh)
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CN1543029A (en
Inventor
萨达南德·G·乔杜里
马亨德拉·C·达夫
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Larsen & Toubro Co ltd
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Larsen & Toubro Co ltd
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Filing date
Publication date
Priority to IN620/MUM/2003 priority Critical
Priority to IN620MU2003 priority
Application filed by Larsen & Toubro Co ltd filed Critical Larsen & Toubro Co ltd
Publication of CN1543029A publication Critical patent/CN1543029A/en
Application granted granted Critical
Publication of CN100341216C publication Critical patent/CN100341216C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The present invention relates to a safety mutual locking system for an extraction type circuit-breaking switch, which is capable of preventing the circuit-breaking switch from being contacted suddenly/without an authorization when it is at the working state, meaning that when the main circuit is integral, the different positions ('working' position, 'testing' position and 'separating' position) of the circuit-breaking switch can be changed through simple manipulations which are friendly to users. Said system includes an intelligent manipulation and unlocking mechanism to satisfy the requirement of the circuit-breaking switch for security. Besides simplicity of operation, said system does not need experiences or complicated install equipment/tools because that the system is mounted at instrument board doors and support frames.

Description

The safety interlock system that is used for circuit-breaker
Technical field:
The present invention relates to a kind of safety interlock system that is used on the circuit-breaker, be used for preventing under condition of work promptly to be to occur contact circuit circuit breaker unexpectedly/without permission under the complete situation of main current channel, also provide a kind of in use simple and to user-friendly user mode conversion regime, i.e. conversion between " work " state, " test " state and " isolation " state.The present invention is meant that especially containing intelligence operation and unlatching (defeat) mechanism makes the circuit-breaker that equipment is worked under the safe condition that requires.
Background technology:
The circuit-breaker that is used for low pressure is applied in electric current usually and is not higher than under 6400 amperes the condition.These tie breakers can be fixed or pull-out types.For the circuit-breaker of pull-out type, need an extra shape unit, chamber usually, be called bracing frame below.By bracing frame, the electric current of the circuit-breaker part of flowing through is connected to instrument board and also is the electric current of the switchboard part of flowing through.Instrument board is a big chamber, in have complete parts be installed, be connected on the main power supply by electric wire or other modes.In any one circuit-breaker, all having provides a control circuit of power supply supply to be connected to various annexes, such as closing coil (Closing release), shunt release (Shuntrelease), electronic charging device (Electrical charging device) or the like.
The pull-out type circuit-breaker can present 3 kinds of different positions in bracing frame:
1. " work " position; This moment, power supply and control circuit were all complete.When circuit-breaker is in this position during at operating state.
2. " test " position; When power circuit is to disconnect and control circuit is coupled.When this position, circuit-breaker can not need switch/running power supply to carry out functional test.
3. " isolation " position; This moment, control circuit also was disconnected.
When circuit-breaker is under work/test case, the door of instrument board must be guaranteed to close, because people's contact circuit circuit breaker may be fatal meeting operator and equipment is caused damage.Yet for testing goal, the instrument board door can have under the situation of supervision by people's unlatching that relevant knowledge is arranged.The door of instrument board with routine/conspicuous method such as push away/it is impossible that key that revolving door is locked is opened.Equally for the purpose of safety, when circuit-breaker is under work/test case, perhaps under the situation that the instrument board door is opened, door can be closed easily and be need not extra skill/knowledge.Such facility is exactly described interlocking.
The interlocking of circuit-breaker and instrument board door need be fitted to each other, and a cover is positioned on the circuit-breaker another set of being positioned on the instrument board door.Can provide by relevant manufacturer when this device is installed in the support ledge timesharing, need provide by the instrument board producer when device is installed on the instrument board door.Therefore, it will be very simple that device is installed on the instrument board door, and not need special skill/instrument, can finish in little time, and these all are necessary.
This device is installed be should be noted that position, the hitch (trapping) of assembly and prevents rotation on the instrument board door.May carry out unconspicuous cutting to form rectangle, square, triangle or other irregular shapes to the instrument board door for satisfying these requirements.
Therefore most of erecting devices on the instrument board door manufacturer or carried out complicated cutting, just need with special instrument/equipment, perhaps simple cutting, is fixed on assembly on the instrument board door such as the method for riveted joint/welding still by irreversible method.In some changed, this grip assembly can be adjusted so that can be installed in the left side or the right side of circuit-breaker independently.This will cause a lot of inconvenience to those users who requires the described arrangements of components on the instrument board to put in place.Equally, if if the most of employing of existing installation circuit breaker is in work/test case and door is the unlatching situation, door can not be closed by the method for simply the instrument board door being pushed to circuit-breaker.On the other hand, the unlatching interlocking/opening door operation of these devices is too simple, need not or requested knowledge seldom.Therefore, common and any/undelegated people can open the door of in running order circuit-breaker easily.Equipment is in the very situation of lower security factor like this.
Summary of the invention:
Basic purpose of the present invention is to provide the safety interlock assembly of a pull-out type circuit-breaker, can satisfy higher safety requirements no matter open or off switch plate door in, and use is simpler, and cost performance is higher, can solve above-mentioned the deficiencies in the prior art.
Next purpose of the present invention is to provide a kind of safety interlock system of pull-out type circuit-breaker, this system can satisfy when closing door the requirement of proficiency/intelligence, to guarantee safety, whether satisfied the people that minimum and intelligence/proficiency higher degree requires and opened door, so as to know the circuit-breaker operation personnel/monitoring personnel can work or test case under the contact circuit circuit breaker.
A further object of the present invention is to provide a kind of safety interlock system of pull-out type circuit-breaker, realizes that the people of different intelligence degree gives necessary additional safety in opening and closing switchboard door.
Another object of the present invention is to provide a kind of safety interlock system of pull-out type circuit-breaker, and it has intelligence operation/unlatching locking mechanism, can be installed in quickly and easily on instrument board door and the circuit-breaker bracing frame.
The last purpose of the present invention is to provide a kind of interlock system, can be adjusted the back at three different X, produces on Y and the Z size range.
According to basic conception of the present invention, pull-out type circuit-breaker safety interlock system provided by the present invention comprises:
Instrument board door supports can be mounted thereto interlocking assembly, this assembly comprises that a support is to be fit to that an interlocking portions based on the latch of " isolation " position, " test " position or " work " position of selected circuit-breaker is realized locking and unlock operation, an available key operated opener; With an interlocking assembly that supports and be installed on it by bracing frame, this interlocking assembly comprises that hinge supports described latch and an actuator, elastic force skew and at least a portion that this actuator is kept described hinge rotatablely move, therefore when circuit-breaker is in the isolated location, because the elastic force of described latch and actuator skew, the interlocking portions of latch does not contact support, make the interlocking portions of latch that support frame as described above supports interlocking assembly with respect to the support of described support meter plate door assembly, be in lockset position of coupler; When circuit-breaker is shifted to test position, the convex body (projection) of the end of a described actuator (tip) part contact breaker, when circuit breaker arrives test position, the interlocking portions cover of described latch is buckled in the hole (cavity) of described support, thereby described latch is in locking-in state with respect to the instrument board door; When circuit-breaker is shifted to the service position, it is more deep that actuator moves, and latch still overlapped and was buckled on the described support this moment, and door is a locking when making circuit-breaker in described service position the process that breaks away from from actuator.
The safety mutually-locking device of above-mentioned pull-out type circuit-breaker, on the one hand provide a simple operations and high performance-price ratio, particularly " work " position, " test " position and " isolation " position of the select location of 3 diverse locations in the circuit-breaker bracing frame.Importantly, equipment provided by the invention is easy to partition, does not need special experience or complex apparatus/instrument when being installed on instrument board door and the bracing frame like this.
Provided by the invention have the pull-out type circuit-breaker safety interlock system of intelligent opening to comprise: instrument board door supports can be mounted thereto interlocking assembly, comprise a support so that locking and unlock operation, one based on circuit-breaker selected " isolation ", the interlocking portions operated of the latch of " test " and " work " position, an available key operated opener, this device comprises a cam, to cooperate the described interlocking portions that activates the latch on the pull-out type circuit-breaker support with described key, cooperate with described support and unblank the instrument board door and realize lock again by simply closing the instrument board door operation; With an interlocking assembly that supports and be installed on it by bracing frame, this interlocking assembly comprises that hinge supports described latch and actuator and keeps elastic force skew and at least a portion of described hinge and rotatablely move, therefore when circuit-breaker is in the isolated location, because the elastic force shift state of described latch and actuator, the interlocking portions of latch can not connect with support, makes the interlocking portions of the interlocking assembly latch that described bracing frame supports be in the separation point position with respect to the support that has the instrument board door to support; When circuit-breaker is shifted to test position, the end portion of described actuator contacts with the convex body of circuit breaker, when circuit breaker arrives test position, the interlocking portions quilt cover of described latch buckles in the hole of described support and then makes and is in of the lock bit putting with respect to the instrument board door bolt; When circuit-breaker is shifted to the service position, actuator further moves, and latch still overlapped and was buckled in the described support this moment, and door is locking when making that circuit-breaker is in described service position from the actuator separating process.
Safety interlock system at the pull-out type circuit-breaker of above-mentioned announcement has intelligence to unblank, and Lock-Picking Devices are in supply and use all very simple.Key and described cooperation cam mechanism are that selectivity provides, so as only need to push earlier the key certain distance, then rotate some angles, again shift onto the bottom just can unblank.Simple push instrument board door will be locked once more once more.
According to another notion of the present invention, key operated open system is installed on the instrument board door of pull-out type circuit-breaker, comprise: a key and a cam, this cam cooperates described key to activate the interlocking portions of the latch of pull-out type circuit-breaker bracing frame support, and cooperate the support be fixed on the instrument board door to realize the instrument board door, and make the interlocking portions of the latch that pull-out type circuit-breaker bracing frame supports realize lock again with the support that is fixed on the instrument board door by the action of simply closing the instrument board door with respect to the unblanking of bracing frame.
Therefore according to above-mentioned the present invention, the unique cooperation between instrument board door and circuit-breaker has realized the automatic blocking and the intelligent opening of the instrument board door interlocking of expection.This has realized higher fail safe and convenience to operator and circuit-breaker user.
For convenience of description, the parts on the instrument board door are called as " interlocking assembly that the instrument board door supports ".The interlocking assembly that described instrument board door supports comprises structures such as support, cam, nut, key, servo-actuated bolt and key return spring.
Similarly, the parts by circuit-breaker bracing frame location are called as " interlocking assembly that bracing frame supports ".The interlocking assembly that this bracing frame supports comprises latch, brake, actuator, latch return spring, actuator springs and latch hinge.
" interlocking assembly that bracing frame supports " can be installed in the left side or the right of pull-out type circuit-breaker bracing frame.This selection makes the instrument board producer can select how to install according to putting of instrument board hinge.Selecting these parts to design instrument board just without any obstacle for the user like this, if door is that the hinged interlocking in the left side is suitable for being contained in right-hand side, vice versa.
For " interlocking assembly that the instrument board door supports " being installed to the instrument board door, suitable cutting is installed on the instrument board door to adapt to " interlocking assembly that the instrument board door supports ".This cutting will be noted location, the hitch of " interlocking assembly that the instrument board door supports " and prevent rotation.The cutting of carrying out " D " shape in system of the present invention on door can help to carry out standard demonstration operation.Need not special punching press/instrument.For fixing " interlocking assembly that the instrument board door supports ", " D " shape cutting that needs is to realize the hole of minor diameter on the large diameter borehole jack.Be buckled between door and the nut at cam quilt cover under the help of this cutting tip, the support quilt cover is buckled between instrument board door and the nut.A major advantage of hitch cam and support is without any need for extra equipment/instrument.
Latch is hinged on the bracing frame in " interlocking assembly that bracing frame supports "." interlocking assembly that bracing frame supports " is installed is held the circuit-breaker left and right sides.The latch actuator is by two springs, and actuator springs and latch return spring are installed on the latch hinge.When circuit-breaker is in " isolation " position, an arm quilt cover of actuator springs leans against on the actuator, thereby and another arm cover of actuator springs leans against first fixed reference part of bracing frame and obtains required elastic force effect.Second reference part of bracing frame is positioned at the front of first reference part actuator is played the brake effect, makes actuator arrive its initial position.The convex body of latch (projection) keeps latch to stop with respect to the surface of actuator and then the initial position that the defined latch non-locked position of coupler of latch just.
Before circuit-breaker began to shift to test position and arrives test position, circuit-breaker began to promote actuator.Because latch by the latch hinge hinged and load by the latch return spring, when circuit-breaker begins to promote actuator, latch begins relatively its hinge rotation and stops at second reference position of bracing frame, this has determined the rearmost position of latch.When latch is finished motion, the terminal quilt cover of latch is buckled in the hole of support.Effect is that door is lockable.Latch is maintained at this position and arrives the service position up to circuit-breaker.
Be installed on the circuit-breaker " bracing frame support interlocking assembly " will with " interlocking assembly that the instrument board door supports " cooperating that is installed on the instrument board.The product of plurality of specifications can be provided in the production, X, Y and Z axle gauge lattice are at instrument board, the instrument board door of 4-5mm and be installed in circuit-breaker on the instrument board.The variation of support is in X and Y-axis.The product variations of the brake of " engaging mechanism " can only be at the Z axial plane equally.
In order to use key operated/this latch mechanism of unlatching that is installed on the instrument board door, a servo-actuated bolt advances key to move with the cam outline and opens locking.The profile of cam makes the servo-actuated of servo-actuated bolt, like this interlocking can not by promotion/screw key only or other significantly the method for operation of lock realize.Need partly promote it, rotate it in order to operate/open interlocking, and then be pushed into last position.The lock opener is installed in the end of key, and it is a pawl matching mechanism.When key is pressed, the inclined-plane of latch outline begins to break away from the outline inclined-plane of opener.After key is pulled to the rearmost position, and latch is lifted, break away from from support.
Correspondingly, when key is withdrawn from, because the key return spring makes key get back to original position together with opener mounted thereto.Therefore, latch moves down and is fastened by support casing.When circuit-breaker begins to shift to test position by the service position, actuator moves together with circuit-breaker.Also further move to the isolated location when circuit-breaker arrives test position, the surface of actuator begins to touch the surface of latch.Therefore actuator begins to promote latch and moves upward and stop actuator movements up to second reference part.When actuator is parked in second reference part, latch is out of stock fully from the support.
When circuit-breaker is in work/test position, if the instrument board door is that working in its vicinity of opening is dangerous.Therefore must need not any extra effort/intelligence closes the instrument board door, and just the instrument board door be closed and be locked to anyone (no matter whether being familiar with the work of circuit-breaker) can by simple action, preferably simple a promotion.In the present invention, when closing, the outline inclined-plane of latch begins to touch the rear surface of support.Because latch is by the load of latch return spring and lifting, in case door is fully closed, support leaves latch, and because the return spring of latch makes latch return, the pin of latch front portion is fastened by the borehole jack of support.
This patent also has following subsidiary characteristic:
Described cam is an annular, this cam has selected diameter, and semicircle convex body is positioned at its smaller diameter distal and connects the ring (collar) that same size matches so that place on the instrument board door and relative with the instrument board outer side of door, described cam has a hollow hole can guarantee that when operation of cam key can contact the latch pin (Latch tip) of described " interlocking assembly that bracing frame supports ", the front end of key has key slot (slots), in have the servo-actuated bolt (pin) can be at the end of when operation contact pusher.
Described support comprises ' G ' shape support, and has one to cut identical cutting with the instrument board door at its front end in the face of door, and a bracket holes is arranged in its back-end.
Described latch has U-shaped parts that have the coaxial bearings hole that extend in its back-end downwards, be used for described latch reliably hinged with the described hinge that is fixed on the bracing frame, described actuator is positioned at below the described latch, also has dead eye to be used for rising on hinged described hinge and the latch the described U-shaped parts of hinge interconnect function in its back-end.
Description of drawings:
Purpose of the present invention and advantage will illustrate by following non-limiting specific example:
Fig. 1 a is that the instrument board door of interlock system of the present invention is in order to install the cutting that interlocking assembly carries out;
Fig. 1 b is the exploded view that is fixed on the instrument board interlocking assembly on the instrument board door;
Fig. 2 a is the detail drawing that is used in the cam of instrument board door interlocking assembly;
Fig. 2 b is the key that the servo-actuated bolt is arranged that is used in the instrument board door interlocking assembly;
Fig. 2 c is the pusher detail drawing of instrument board door interlocking assembly;
Fig. 3 is the isometric view of the kit of instrument board door interlocking assembly;
Fig. 4 a is the actuator detail drawing of the interlocking assembly of bracing frame support of the present invention;
Fig. 4 b is the latch detail drawing of the interlocking assembly of bracing frame support of the present invention;
Fig. 5 is the isometric view that is fixed on the parts of the interlocking assembly that the bracing frame on the circuit-breaker bracing frame supports;
The cutaway view of latch and actuator when Fig. 6 is in isolation and test position for circuit-breaker;
Fig. 7 is the cutaway view that latch breaks away from from pusher when operation/unlatching;
Fig. 8 is the cutaway view when realizing the automatic blocking function.
Embodiment:
In conjunction with above-mentioned non-limitative drawings the present invention is described.Number for ease of explanation.
As shown in Figure 1, a cutting tip 1 is arranged on instrument board door 2, this cutting comprises a hole 1a who is arranged in the minor diameter of large diameter hole 1b.Transformable is that it can be that two cuttings are so that install non-rotatable assembly.
External screw thread is arranged on the cam 3 and be installed on the instrument board door by screw-internal thread fit with nut 4.Have on the support 5 and the identical perforate of cutting tip among Fig. 1, as desired on instrument board door 2.Support 5 quilt covers are buckled between instrument board door 2 and the nut 4, as orientation shown in Figure 3.When assembling cam 3 was to the instrument board door, the operator should be noted that the semicircle convex body 3a that is positioned on the cam 3, and it is interference fitted among the small diameter bore 1a, lays respectively on instrument board door 2 and the support 5, can guarantee that like this assembly can not rotate.
Key-servo-actuated bolt assembly (Fig. 2 b) comprises that key 6 and servo-actuated bolt 7 are assembled on the groove 3b on the cam 3.Key return spring 8 also is assembled into same groove 3b, can help key-servo-actuated bolt assembly to return (Fig. 2 b) automatically.
Shown in Fig. 4,5, latch 10 is hinged on the non-moving part of the bracing frame that is called side plate 12 by latch hinge 11.Actuator 13 is installed on the same latch hinge 11.Two springs, actuator springs 14 and latch return spring 15 are assembled on the actuator 13, and shown in Fig. 5,7,8, an arm quilt cover of latch spring 15 is buckled in the hole of actuator 13, and another arm quilt cover is buckled in the hole of described latch 10.Brake 16 quilt covers are buckled in the hole 10a of latch 10.
When circuit-breaker 19 is in isolated location 20I, be presented at the chain-dotted line district of Fig. 6, an arm 14a quilt cover of actuator springs is buckled in first reference part 17 of bracing frame, and another arm 14b of actuator springs leans against on the actuator 13.Because the elastic force effect of actuator springs 14, actuator 13 leans against second reference part 18 of bracing frame.The convex body 10b of latch 10 pushes up the surperficial 13a of actuator and stops actuator 13, and this has determined the initial position of latch 10.Under this condition, latch 10 does not contact with support 5, therefore is regarded as " non-locking " position of latch 10/ instrument board door 2.When circuit-breaker begins to shift to test position 20T, but also do not arrive test position 20T, the convex body 19a of circuit breaker 19 begins the terminal 13b of contact activated device 13.As circuit breaker arrival test position 20T, the pin 10c quilt cover of latch 10 is buckled on the hole 5a of support 5.This is regarded as the latched position of latch 10/ instrument board door 2.
When circuit-breaker further moves to the service position, actuator 13 further moves inwards.Because latch 10 stops on the support 5, therefore it break away from from actuator can not continue to move.Brake 16 quilt covers on the latch 10 are buckled in the hole of latch 10, and a reference part with respect to the bracing frame side arranged, can a plurality of variations be arranged according to ' Z ' plane of instrument board, if the assembly that is positioned on the instrument board door moves down, brake 16 will determine the rearmost position of latch 10 at blocking so.The width 5W of support 5 and degree of depth 5D can provide multiple variation according to ' X ' that be loaded on the circuit-breaker instrument board and ' Y ' plane.
If the operator need open door during in test/service position at circuit-breaker 19, need extra skill/intelligence operate/open 2.This is because the profile 3b of cam 3 uniquenesses.Because operation/unlatching only advancing key 6 to certain distance, rotates to an angle then and shifts the bottom of profile again onto.Because operation key 6, pin 10c relies on the pin 9a of pusher 9, so latch 10 makes door 2 be unlocked, if shown in Figure 7 from support 5 disengagings.
Ifs circuit circuit breaker 19 is in test/service position and door 2 is in opening.In mutual interlocking gear provided by the invention, just can lock described door and need not any extra skill towards circuit-breaker as long as simply push away the instrument board door.In Fig. 8, explain in detail below.The ifs circuit circuit breaker is in test/service position, and latch 10 will be in a lower position.When door is closed, the pin 10c of latch 10 slips over the surface of support 5 ends, and its allows instrument board door 2 to be moved further, and latch 10 quilt covers are buckled among the hole 5a of support 5 then, and instrument board door 2 is locked/plugged like this.
The safety interlock assembly of pull-out type circuit-breaker provided by the invention can provide the additional safety of requirement no matter to open or closed condition at the instrument board door on the one hand, provides a simple and high system of high performance-price ratio can avoid the shortcoming of present mutual interlocking gear on the other hand.
Above-mentioned pull-out type circuit-breaker safety interlock assembly provided by the invention can realize that the people of different intellectual levels gives enough mobility to guarantee safety when opening and closing instrument board door.Importantly, system provided by the invention can realize the operation/unlatching locking mechanism of high intelligence, also can be installed in simply and fastly on the instrument board door of circuit-breaker.Interlocking assembly can be at X, provides different change in size on Y and the Z axle, gives the wideer more friendly use of user, has avoided the shortcoming of available circuit circuit breaker interlocking.

Claims (24)

1, a kind of safety interlock system of pull-out type circuit-breaker comprises:
Instrument board door supports can be mounted thereto interlocking assembly, this assembly comprises that a support realizes locking and unblank an available key operated opener an interlocking portions based on the latch of isolated location, test position and the service position of selected circuit-breaker being fit to;
An interlocking assembly that is supported and be installed on it by bracing frame, this interlocking assembly comprise hinge to support described latch and actuator and keep about the elastic force skew of described hinge and to realize that at least a portion rotatablely moves, therefore,
When circuit-breaker is in the isolated location, because the elastic force of described latch and actuator skew, the interlocking portions of described latch does not contact described support, and makes the described interlocking portions of the latch that the interlocking assembly that supported by support frame as described above supports be in lockset position of coupler with respect to the support that is supported by described instrument board door;
When circuit-breaker is shifted to test position, the end portion of described actuator begins a convex body of contact breaker, and when circuit breaker arrival test position, the interlocking portions cover of described latch is buckled in the hole of described support, thereby is in locking-in state with respect to the instrument board door;
When circuit-breaker is shifted to the service position, actuator further moves, and latch still overlapped and was buckled in the described support this moment, and when described latch made circuit-breaker in described service position from the process that actuator breaks away from, door was locking.
2, a kind of safety interlock system of pull-out type circuit-breaker according to claim 1, wherein said available key operated opener comprises a cam, it cooperates described key to activate the interlocking portions of the latch of installing on the described pull-out type circuit-breaker bracing frame, and cooperates described support to make the instrument board door unblank and lock the instrument board door again by simple closing motion.
3, a kind of safety interlock system of pull-out type circuit-breaker according to claim 2, the interlocking assembly that wherein said instrument board door supports is the cutting tip that is installed in door, this cutting tip is to be with small diameter bore in the large diameter hole.
4, a kind of safety interlock system of pull-out type circuit-breaker according to claim 3, cam in the interlocking assembly that wherein said instrument board door supports is an annular, this cam has selected diameter, and semicircle convex body is positioned at its smaller diameter distal and connects the ring that same size matches so that place on the instrument board door and relative with the instrument board outer side of door, the interlocking assembly that described instrument board door supports comprises a pusher, described latch comprises a pin, described cam has a hollow hole can guarantee that when operation of cam key can contact the latch pin of the interlocking assembly that described bracing frame supports, the front end of key has key slot, in have a servo-actuated bolt to advance key in when operation, by the end of this key contact pusher.
5, a kind of safety interlock system of pull-out type circuit-breaker according to claim 4, wherein said cam is milled shaping, and by the key that operation is positioned at the front it is moved inward earlier again and continue to move inward after the rotation, thereby thereby the pin that activates the interlocking assembly latch that bracing frame supports is realized purpose of opening.
6, a kind of safety interlock system of pull-out type circuit-breaker according to claim 4, the rear end of wherein said pusher have a beveled profile, so that pusher contacts the pin of described latch.
7, a kind of safety interlock system of pull-out type circuit-breaker according to claim 3, it is characterized in that: described support comprises a G shape support, and the front end of described stent cover opposite house have one with the identical cutting of instrument board door cutting, at described back-end support a hole is arranged, the interlocking portions cover of described latch is buckled in this hole.
8, a kind of safety interlock system of pull-out type circuit-breaker according to claim 2 is characterized in that: described support is fastened onto between a door and the nut, and this nut support is with respect to the described cam of door.
9, a kind of safety interlock system of pull-out type circuit-breaker according to claim 8, the corresponding external screw thread coupling of the internal thread of wherein said nut and cam also reversibly is fixed on the latter on the instrument board door.
10, a kind of safety interlock system of pull-out type circuit-breaker according to claim 1, the interlocking assembly that wherein said bracing frame supports can be installed in the left side or the right side of pull-out type circuit-breaker bracing frame.
11, a kind of safety interlock system of pull-out type circuit-breaker according to claim 1, wherein said hinges fixing fixes on bracing frame one side, described latch has one and is positioned at the pin that front end has the latch function, one with described actuator on the convex body that partly matches of corresponding operating.
12, a kind of safety interlock system of pull-out type circuit-breaker according to claim 1, wherein said latch has U-shaped parts that have the coaxial bearings hole that extend in its back-end downwards, be used for described latch reliably hinged with the described hinge that is fixed on the bracing frame, described actuator is positioned at below the described latch, also has dead eye to be used for rising on hinged described hinge and the latch the described U-shaped parts of hinge interconnect function in its back-end.
13, a kind of safety interlock system of pull-out type circuit-breaker according to claim 12, wherein said actuator is hinged, so that in the circuit-breaker suction, when extracting out in the U-shaped parts that bracing frame and quilt cover be buckled in described latch, required rotatablely moving is provided, an arm of actuator springs is positioned at first reference part of bracing frame, and another arm is positioned on the actuator.
14, a kind of safety interlock system of pull-out type circuit-breaker according to claim 11, wherein said actuator comprises a surface that is positioned at the terminal of an end and relies on the latch convex body, one arm quilt cover of latch return spring is buckled in the hole of actuator, and another arm quilt cover is buckled in the hole of described latch.
15, a kind of safety interlock system according to the pull-out type circuit-breaker described in the claim 1, the interlocking assembly that described bracing frame supports comprises a brake, described brake quilt cover is buckled in the hole of described latch, and a reference part with respect to the bracing frame side is arranged.
16, a kind of safety interlock system of pull-out type circuit-breaker according to claim 15, wherein in order to cooperate described brake, the surface of latch forwardly and have two holes between the rear portion, when the interlocking assembly of bracing frame support is installed in the circuit-breaker left side, the brake quilt cover is buckled in the hole, when the interlocking assembly of bracing frame support was installed in circuit-breaker the right, the brake quilt cover was buckled in another hole.
17, a kind of safety interlock system of pull-out type circuit-breaker according to claim 4, wherein: adjust the interlocking assembly of described instrument board door support and the interlocking assembly that bracing frame supports, when beginning to shift to test position with convenient circuit-breaker, the convex body of circuit-breaker promotes actuator, and latch begins to rotate around hinge; Be loaded on the anterior of brake barrier support frame on the latch and determine the final position of latch, latch finish move after, locked thereby the pin quilt cover of latch is buckled in the hole of support door, the pin of latch and the hole of support constitute a lock structure; Latch remains on same position and arrives the service position up to circuit-breaker.
18, a kind of safety interlock system of pull-out type circuit-breaker according to claim 17, wherein in order to operate/open described locking mechanism, described key cooperates the servo-actuated bolt to move with the outline of cam to realize unblanking.
19, a kind of safety interlock system of pull-out type circuit-breaker according to claim 18 is wherein opened for operation, and described key is partly pushed, and is pushed into its rearmost position after the rotation again.
20, a kind of safety interlock system of pull-out type circuit-breaker according to claim 19, wherein said key can be withdrawn from from described available key operated opener.
21, a kind of safety interlock system of pull-out type circuit-breaker according to claim 4, described cam, it has unique outline, and described semicircle convex body matches with the small diameter bore of the cutting tip of door.
22, a kind of safety interlock system of pull-out type circuit-breaker according to claim 4, the cutting tip of wherein said door, in the hole of two simple shapes that described cutting tip merges, large diameter hole cooperates cam, and small diameter bore cooperates the above semicircle convex body of cam.
23, a kind of safety interlock system of pull-out type circuit-breaker according to claim 1, wherein said support has a hole endways, the pin that can promote latch when door when circuit-breaker moves partly promotes spring loaded latch, and latch is because action of gravity decline and quilt cover is buckled in the hole of support.
24, a kind of safety interlock system of pull-out type circuit-breaker according to claim 1, wherein said interlocking assembly on the instrument board door and the interlocking assembly on the bracing frame of being installed in can have the variation of different size.
CNB2004100426655A 2003-06-13 2004-05-31 Safety interlock system for circuit breaker Expired - Fee Related CN100341216C (en)

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IN620/MUM/2003 2003-06-13
IN620MU2003 2003-06-13

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056725A1 (en) * 2004-11-19 2006-06-01 Siemens Ag Locking device and slide-in frame with a locking device
JP4367407B2 (en) * 2005-12-16 2009-11-18 三菱電機株式会社 Control circuit connection device for drawer type circuit breaker
KR101659863B1 (en) * 2014-10-30 2016-09-26 엘에스산전 주식회사 Interlock apparatus of vacuum circuit breaker
CN105932549A (en) * 2016-06-29 2016-09-07 曲旭贵 Electrical cabinet device with instrument panel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714383A (en) * 1971-10-27 1973-01-30 Square D Co Key operated electric circuit breaker
US5963420A (en) * 1997-09-22 1999-10-05 Eaton Corporation Interlock bypass
US6192718B1 (en) * 1999-03-29 2001-02-27 Siemens Energy & Automation, Inc. Key lock and locking hasp assembly for a stored energy circuit breaker operator assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714383A (en) * 1971-10-27 1973-01-30 Square D Co Key operated electric circuit breaker
US5963420A (en) * 1997-09-22 1999-10-05 Eaton Corporation Interlock bypass
US6192718B1 (en) * 1999-03-29 2001-02-27 Siemens Energy & Automation, Inc. Key lock and locking hasp assembly for a stored energy circuit breaker operator assembly

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