CN101488423B - Selective protection switch and operation mechanism thereof - Google Patents
Selective protection switch and operation mechanism thereof Download PDFInfo
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- CN101488423B CN101488423B CN2008100326091A CN200810032609A CN101488423B CN 101488423 B CN101488423 B CN 101488423B CN 2008100326091 A CN2008100326091 A CN 2008100326091A CN 200810032609 A CN200810032609 A CN 200810032609A CN 101488423 B CN101488423 B CN 101488423B
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Abstract
The invention discloses a selective protection switch, comprising a main loop, an auxiliary loop and an operation mechanism, wherein the main loop is arranged between an inlet terminal and an outlet terminal, and comprises an overcurrent release, a main contact and an electromagnetic mechanism which are connected in series, wherein the electromagnetic mechanism leads the main contact to be disconnected and maintain the disconnected position through a third working line; the auxiliary loop is connected with the overcurrent release and the main contact on the main loop in parallel, and comprises a current-limiting resistor, a selective protection release and an auxiliary contact which are connected in series; the operation mechanism is provided with an operation handle, and respectively acts on the main contact and the auxiliary contact by a first working line and a second working line through rotating the operation handle, so that the main contact and the auxiliary contact are disconnected or closed; the overcurrent release acts on the operation mechanism through a forth working line, so that the operation mechanism is released; the selective protection release acts on the operation mechanism through a fifth working line, so that the operation mechanism is released; and after the operation mechanism is released, the main contact and the auxiliary contact are disconnected simultaneously.
Description
Technical field
The present invention relates to field of circuit breakers, more particularly, relate to selective protection switch and operating mechanism thereof in the circuit breaker.
Background technology
At present; development along with architectural electricity and building automation; the application of miniature circuit breaker in the house power distribution system more and more widely; but because this type of switch mostly lacks the selective protection function; do not possess short circuit short time delay protective feature; thereby cause the phenomenon of overstep tripping in the house power distribution system commonplace, this has just greatly influenced the stability and the reliability of distribution system.
Summary of the invention
The present invention aims to provide a kind of selective protection switch, comprising:
Major loop, between end of incoming cables and leading-out terminal, described major loop comprises overcurrent trip, main contact and the electromagnetic mechanism of series connection, wherein, electromagnetic mechanism disconnects main contact by the 3rd working line and maintains open position;
Subsidiary loop, overcurrent trip, main contact on subsidiary loop and the major loop are in parallel, and described subsidiary loop comprises current-limiting resistance, selective protection release and the auxiliary contact of series connection;
Operating mechanism, described operating mechanism has operating grip, and by the rotating operation handle, this operating mechanism acts on main contact and auxiliary contact respectively through first working line and second working line, main contact and auxiliary contact is disconnected or closure;
Wherein, described overcurrent trip acts on operating mechanism by the 4th working line, and operating mechanism is threaded off; Described selective protection release acts on operating mechanism by the 5th working line, and operating mechanism is threaded off; After operating mechanism was threaded off, main contact and auxiliary contact disconnected simultaneously.
Wherein, when distribution system generation overload current, described overcurrent trip acts on push rod on the operating mechanism by the 4th working line after time-delay a period of time, and operating mechanism is threaded off, main contact and auxiliary contact all disconnect, and play the protective feature of overload long delay; When distribution system is short-circuited electric current, electromagnetic mechanism on the major loop moves and touches on the bridge by the master of the 3rd working line momentary action in operating mechanism, make the main contact disconnection and maintain open position, and this moment, auxiliary contact still was kept closed, short circuit current is transformed on the subsidiary loop and by current-limiting resistance from major loop and carries out current limliting, if after the miniature short-circuiting device that connects can in time fix a breakdown, the electromagnetic mechanism on the major loop stops action so, main contact is returned to closure state; If after the miniature circuit breaker that connects can not fix a breakdown; act on push rod on the operating mechanism by the 5th working line after selective protection release time-delay a period of time so; operating mechanism is threaded off, and main contact and auxiliary contact disconnect, and play the protective feature of short circuit short time delay.
First support and second support are fixed together by first, second and the 3rd; Have first convex shoulder, first through hole and first bent over arms on described first support, this first support also comprises an additional bent over arms; Have second convex shoulder, second through hole and second bent over arms on described second support, wherein first convex shoulder, first through hole and first bent over arms and second convex shoulder, second through hole and second bent over arms are respectively in correspondence with each other.
Operating grip is rotatably supported on first, and an end of this operating grip connects bolt by first and is connected with first connecting rod; First connecting rod connects bolt by second and second connecting rod links; Second connecting rod connects bolt by the 3rd and is connected with third connecting rod; The other end of third connecting rod is rotatably supported on second.
One end of locking-bar has a through hole, and first convex shoulder on this through hole and first support and second convex shoulder on second support match, and make locking-bar be rotatably supported on first support and second support; The other end of locking-bar has a crescent groove, and second connects bolt slides in crescent-shaped slot; Locking-bar has a convex shoulder at this end with crescent-shaped slot; One end of tripping bar is rotatably supported on first, and the other end has a rectangular through slot, and the convex shoulder on the described locking-bar abuts against on the rectangular through slot, so operating mechanism constitutes snap close in the snap close position; The core of push rod has a protruding axle, in this protruding first through hole and second through hole that is fixed on first support and second support, and can rotate around the center of first through hole, second through hole; One end of push rod has a U-shaped chute, and tetrad connects bolt and slides in this U-shaped chute, and described tetrad connects bolt and is fixed on the tripping bar near in the third through-hole of rectangular through slot; First torsion spring is housed in the operating grip, and first torsion spring has two arms, and wherein the first arm acts on the operating grip, and second arm acts in the groove on the tripping bar.
The 4th connecting rod equally is fixed on the 3rd with third connecting rod and connects on bolt and second, and the 4th connecting rod separates by second support between the 4th connecting rod and the third connecting rod along with third connecting rod together moves; Third connecting rod and the 4th connecting rod have two sidewalls that are parallel to each other respectively separately, and two sidewalls of third connecting rod are connected by the first nose frame, and two sidewalls of the 4th connecting rod are connected by the second nose frame; The 5th connecting rod, profile takes the shape of the letter U, and the 5th connecting rod has two sidewalls, and two sidewalls are connected by the 3rd nose frame; On two sidewalls of the 5th connecting rod through hole is arranged, be rotatably mounted to by through hole in two sidewalls of third connecting rod, on second; Second torsion spring is fixed in two sidewalls of the 5th connecting rod, on second, it has two arms, the first arm is fixed in the 3rd bent over arms on the third connecting rod first nose frame, second arm is fixed in the 4th bent over arms on the 5th connecting rod; Under the effect of second torsion spring, two sidewalls of the 5th connecting rod abut against on the first nose frame of third connecting rod; First touches bridge, is riveted on the 3rd nose frame of the 5th connecting rod, and first end that touches bridge is the moving contact of main contact; Second core that touches bridge has a through hole, is rotatably mounted to by through hole in two sidewalls of the 4th connecting rod, on second; The 3rd torsion spring is fixed in two sidewalls of the 4th connecting rod, on second, it has two arms, the first arm is fixed in the 5th bent over arms on the 4th connecting rod second nose frame, second arm is fixed on second and touches in the groove of bridge; Under the effect of the 3rd torsion spring, second end that touches bridge abuts against on the second nose frame of the 4th connecting rod; Second other end that touches bridge is the moving contact of auxiliary contact.
The first contact indicating device is fixed on the sidewall of the 4th connecting rod; The second contact indicating device is installed in the switch housing; Extension spring has two earrings, and first earrings is hooked on second bent over arms on second support, and second earrings is hooked on the 6th bent over arms of third connecting rod one sidewall; This operating mechanism is made into an independently module, is fixed in the selective protection switch shell by first bent over arms on first support and additional bent over arms.
When clockwise rotating operating grip when operating mechanism is closed a floodgate, operating grip drives first connecting rod, first connecting rod and drives second connecting rod, second connecting rod and drive pulling force that third connecting rod and the 4th connecting rod overcome extension spring simultaneously and make main contact moving contact and the auxiliary contact moving contact direction closure towards main contact fixed contact and auxiliary contact fixed contact; The clearance between open contacts of auxiliary contact is less than the clearance between open contacts of main contact, and auxiliary contact is prior to the main contact closure, and the back disconnects in main contact, makes switch reduce the scaling loss of electric arc to main contact when normal occlusion, separating brake; The second contact indicating device is installed in the switch housing; When operating mechanism closes a floodgate, the first contact indicating device along with the 4th connecting rod together around second rotation, when operating mechanism closed a floodgate fully, the second contact indicating device and first contact indicating device indication operating mechanism closed a floodgate; When operating mechanism closed a floodgate fully, first line that connects bolt and first connects the bolt and the second connection bolt with first line formed an obtuse angle, and it is worth between 168 ° to 172 °; At this moment, the contact pressure of main contact and auxiliary contact is provided by second torsion spring and the 3rd torsion spring respectively.
When distribution system generation overload current, overcurrent trip time-delay a period of time acts on the push rod, push rod is rotated in a clockwise direction, driving tetrad by U-shaped chute on the push rod connects bolt the tripping bar is rotated around first clockwise direction, because the convex shoulder on the locking-bar loses supporting, therefore locking-bar first convex shoulder and second convex shoulder on first support and second support counterclockwise rotates, operating mechanism is rapid drop-away reset under the effect of the extension spring and first torsion spring, plays the protective feature of overload long delay; When distribution system is short-circuited electric current, electromagnetic mechanism on the major loop moves and acts on first and touches on the arm of bridge, main contact is in disconnect and maintains open position, and this moment, subsidiary loop still was kept closed, short circuit current is transformed on the subsidiary loop and by current-limiting resistance from major loop and carries out current limliting, if after the miniature short-circuiting device that connects can in time fix a breakdown, the electromagnetic mechanism on the major loop stops action so, main contact is returned to closure state; If after the miniature circuit breaker that connects can not fix a breakdown, the selective protection release acted on the push rod after time-delay a period of time so, and operating mechanism is threaded off, main contact and auxiliary contact disconnect, and play the protective feature of short circuit short time delay.
The operating mechanism that the present invention proposes can not only satisfy the needs of selective protection switch, also has another advantage simultaneously: when selective protection switch is closed a floodgate, auxiliary contact is prior to the main contact closure, reduce the scaling loss of electric arc when the benefit of doing like this is switch normal occlusion, separating brake, improve the electric life of switch main contact; In addition, when also being untreated, the distribution system short circuit current can operating mechanism be threaded off by the selective protection release.This operating mechanism can be made into an independently module, and is simple in structure, easy to assembly, and has the switch indicating device, in time the closing of reactive switches, gate-dividing state.
Description of drawings
Appeal of the present invention and other feature, essence, advantage will become more obvious by description below in conjunction with drawings and Examples, in the accompanying drawings, identical Reference numeral is represented identical feature all the time, wherein:
Fig. 1 has disclosed the schematic diagram of selective protection switch of the present invention;
Fig. 2 has disclosed the axonometric drawing of operating mechanism of the present invention;
Fig. 3 a and 3b show the support of operating mechanism of the present invention;
Fig. 4 shows the main TV structure figure of operating mechanism of the present invention, and wherein switch places " separating brake " position;
Fig. 5 shows the main TV structure figure of operating mechanism of the present invention, and wherein switch places " combined floodgate " position;
Fig. 6 shows the lock catch part of operating mechanism of the present invention;
Fig. 7 a and 7b show the main contact and the auxiliary contact part of operating mechanism of the present invention;
Fig. 8 to Figure 10 is an operating mechanism of the present invention by the separating brake position to process that closing position experienced;
Figure 11 shows the schematic diagram that operating mechanism of the present invention is in trip status;
Figure 12 shows the schematic diagram that operating mechanism of the present invention is in short circuit short time delay guard mode.
Embodiment
Below in conjunction with accompanying drawing, specify technical scheme of the present invention.
With reference to shown in Figure 1, selective protection switch provided by the invention comprises:
Wherein, overcurrent trip 15 acts on operating mechanism 21 by the 4th working line 24, and operating mechanism 21 is threaded off; Selective protection release 19 acts on operating mechanism 21 by the 5th working line 25, and operating mechanism 21 is threaded off; After operating mechanism 21 was threaded off, main contact 16 and auxiliary contact 20 disconnected simultaneously.
The course of work of this selective protection switch is as follows: when distribution system generation overload current, overcurrent trip 15 acts on push rod on the operating mechanism 21 by the 4th working line 24 after time-delay a period of times, operating mechanism 21 is threaded off, main contact 16 and auxiliary contact 20 all disconnect, and play the protective feature of overload long delay; When distribution system is short-circuited electric current, electromagnetic mechanism 17 on the major loop 11 moves and touches on the bridge in the master of operating mechanism 21 by 26 momentary actions of the 3rd working line, make main contact 16 disconnections and maintain open position, and this moment, auxiliary contact 20 still was kept closed, short circuit current is transformed on the subsidiary loop 12 and by current-limiting resistance 18 from major loop 11 and carries out current limliting, if after the miniature short-circuiting device that connects can in time fix a breakdown, electromagnetic mechanism 17 on the major loop 11 stops action so, and main contact 16 is returned to closure state; If after the miniature circuit breaker that connects can not fix a breakdown; selective protection release 19 acts on push rod on the operating mechanism 21 by the 5th working line 25 after time-delay a period of times so; operating mechanism 21 is threaded off; main contact 16 and auxiliary contact 20 disconnect, and play the protective feature of short circuit short time delay.
Fig. 2 has disclosed the axonometric drawing of operating mechanism of the present invention, shows the overall structure of operating mechanism of the present invention, and for concrete parts wherein, in conjunction with the view that decomposes, Fig. 3-Fig. 7 is described below:
At first with reference to figure 3a and 3b, show the support of operating mechanism of the present invention: first support 27 and second support 28 are fixed together by first 29, second 30 and the 3rd 31.Have first convex shoulder 41, first through hole 50 and first bent over arms 84 on first support 27, this first support 27 also comprises an additional bent over arms 85.Have second convex shoulder 42, second through hole 51 and second bent over arms 81 on second support 28, wherein first convex shoulder 41, first through hole 50 and first bent over arms 84 and second convex shoulder 42, second through hole 51 and second bent over arms 81 are respectively in correspondence with each other.
Shown in figure 4-6, operations linkage structure and buckle structure in this operating mechanism comprise:
Locking-bar 39, an end of locking-bar 39 has a through hole 40, and first convex shoulder 41 on this through hole 40 and first support 27 and second convex shoulder 42 on second support 28 match, and make locking-bar 39 be rotatably supported on first support 27 and second support 28; The other end of locking-bar 39 has a crescent groove 43, the second connection bolts 35 to slide in crescent-shaped slot 43; Locking-bar 39 has a convex shoulder 46 at this end with crescent-shaped slot 43;
First torsion spring, 55, the first torsion springs 55 are housed in the operating grip 32 have two arms, wherein the first arm 56 acts on the operating grip 32, and second arm 57 acts in the groove on the tripping bar 44.
With reference to figure 7a and 7b, show the main contact and the auxiliary contact part of operating mechanism of the present invention, comprising:
The 4th connecting rod 58 equally is fixed on the 3rd with third connecting rod 38 and connects on bolt 37 and second 30, and the 4th connecting rod 58 separates by second support 28 between the 4th connecting rod 58 and the third connecting rod 38 along with third connecting rod 38 together moves; Third connecting rod 38 and the 4th connecting rod 58 have two sidewalls that are parallel to each other respectively separately, and two sidewalls of third connecting rod 38 are connected by the first nose frame 59, and two sidewalls of the 4th connecting rod 58 are connected by the second nose frame 60;
The 5th connecting rod 61, profile takes the shape of the letter U, and the 5th connecting rod 61 has two sidewalls, and two sidewalls are connected by the 3rd nose frame 62; On two sidewalls of the 5th connecting rod 61 through hole is arranged, be rotatably mounted to by through hole in two sidewalls of third connecting rod 38, on second spool 30;
Second core that touches bridge 70 has a through hole, is rotatably mounted to by through hole in two sidewalls of the 4th connecting rod 58, on second spool 30; The 3rd torsion spring 71 is fixed in two sidewalls of the 4th connecting rod 58, on second spool 30, it has two arms, the first arm 72 is fixed in the 5th bent over arms 73 on the 4th connecting rod 58 second nose framves 60, second arm 74 is fixed on second and touches in the groove 75 of bridge 70; Under the effect of the 3rd torsion spring 71, second end 76 that touches bridge 70 abuts against on the second nose frame 60 of the 4th connecting rod 58; Second other end that touches bridge 70 is the moving contact 77 of auxiliary contact 20.
This operating mechanism also comprises: the first contact indicating device 78, be redness, and be fixed on the sidewall of the 4th connecting rod 58; The second contact indicating device 88 is green, is installed in the switch housing; Extension spring 79 has two earrings, and first earrings 80 is hooked on second bent over arms 81 on second support 28, and second earrings 82 is hooked on the 6th bent over arms 83 of third connecting rod 38 1 sidewalls.
This operating mechanism 21 is made into an independently module, is fixed in the selective protection switch shell by first bent over arms 84 and additional bent over arms 85 on first support 27.
With reference to figure 8-12, show the course of action of operating mechanism of the present invention.Wherein, Fig. 8 to Figure 10 is an operating mechanism of the present invention by the separating brake position to process that closing position experienced; Figure 11 shows the schematic diagram that operating mechanism of the present invention is in trip status; Figure 12 shows the schematic diagram that operating mechanism of the present invention is in short circuit short time delay guard mode.
When clockwise rotating operating grip 32 when operating mechanism 21 is closed a floodgate, operating grip 32 drives first connecting rods 34, first connecting rod 34 and drives second connecting rods 36, second connecting rod 36 and drive pulling force that third connecting rod 38 and the 4th connecting rod 58 overcome extension spring 79 simultaneously and make main contact moving contact 69 and the auxiliary contact moving contact 77 direction closure towards main contact fixed contact 86 and auxiliary contact fixed contact 87; The clearance between open contacts of auxiliary contact 20 is less than the clearance between open contacts of main contact 16, and auxiliary contact 20 is prior to main contact 16 closures, and the back disconnects in main contact 16, makes switch reduce the scaling loss of electric arc to main contact 16 when normal occlusion, separating brake;
The second green contact indicating device 88 is installed in the switch housing; When operating mechanism 21 closes a floodgate, the first red contact indicating device 78 is along with the 4th connecting rod 58 rotates around second 30 together, when operating mechanism 21 closed a floodgate fully, the second contact indicating device 88 and the first contact indicating device, 78 indication operating mechanisms 21 had closed a floodgate.When operating mechanism 21 closed a floodgate fully, from the form direction as can be seen, the color that form shows was red by green commentaries on classics, and expression operating mechanism 21 has closed a floodgate; Because the first red contact indicating device 78 is installed on the 4th connecting rod 58; represent the situation of opening, break of auxiliary contact 20; this shows when distribution system breaks down; the real situation of opening, break of color showing selective protection switch that form is shown refers to that promptly main contact 16 and auxiliary contact 20 all disconnect.
When operating mechanism 21 closed a floodgate fully, first line that connects bolt 33 and first 29 connects the bolt 33 and the second connection bolt 35 with first line formed an obtuse angle, and it is worth between 168 ° to 172 °; At this moment, the contact pressure of main contact 16 and auxiliary contact 20 is provided by second torsion spring 63 and the 3rd torsion spring 71 respectively.
When distribution system generation overload current, overcurrent trip 15 after time-delay a period of times along F
1The directive effect of power on push rod 48; push rod 48 is rotated in a clockwise direction; connecing bolt 54 by the 52 drive tetrads of U-shaped chute on the push rod 48 makes tripping bar 44 rotate around first 29 clockwise direction; because the convex shoulder 49 on the locking-bar 39 loses supporting; therefore locking-bar 39 first convex shoulder 41 and second convex shoulder 42 rotation counterclockwise on first support 27 and second support 28; operating mechanism 21 is rapid drop-away reset under the effect of the extension spring 79 and first torsion spring 55, plays the protective feature of overload long delay.
When distribution system is short-circuited electric current, electromagnetic mechanism on the major loop 11 17 actions and along F
2The directive effect of power touch on the arm 89 of bridge 68 in first, main contact 16 is in disconnect and maintains open position, and this moment, subsidiary loop 20 still was kept closed, short circuit current is transformed on the subsidiary loop 12 and by current-limiting resistance 18 from major loop 11 and carries out current limliting, if after the miniature short-circuiting device that connects can in time fix a breakdown, electromagnetic mechanism 17 on the major loop 11 stops action so, and main contact 16 is returned to closure state; If after the miniature circuit breaker that connects can not fix a breakdown, so the selective protection release after 19 time-delay a period of times along F
1The directive effect of power on push rod 48, operating mechanism 21 is threaded off, main contact 16 and auxiliary contact 20 disconnect, and play the protective feature of short circuit short time delay.
The operating mechanism that the present invention proposes can not only satisfy the needs of selective protection switch, also has another advantage simultaneously: when selective protection switch is closed a floodgate, auxiliary contact is prior to the main contact closure, reduce the scaling loss of electric arc when the benefit of doing like this is switch normal occlusion, separating brake, improve the electric life of switch main contact; In addition, when also being untreated, the distribution system short circuit current can operating mechanism be threaded off by the selective protection release.This operating mechanism can be made into an independently module, and is simple in structure, easy to assembly, and has the switch indicating device, in time the closing of reactive switches, gate-dividing state.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present invention; those skilled in the art can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (8)
1. a selective protection switch is characterized in that, comprising:
Major loop (11), be positioned between end of incoming cables (13) and the leading-out terminal (14), described major loop (11) comprises overcurrent trip (15), main contact (16) and the electromagnetic mechanism (17) of series connection, wherein, electromagnetic mechanism (17) disconnects main contact (16) by the 3rd working line (26) and maintains open position;
Subsidiary loop (12), overcurrent trip (15), main contact (16) on subsidiary loop (12) and the major loop (11) are in parallel, and described subsidiary loop (12) comprises current-limiting resistance (18), selective protection release (19) and the auxiliary contact (20) of series connection;
Operating mechanism (21), described operating mechanism has operating grip, by the rotating operation handle, this operating mechanism (21) acts on main contact (16) and auxiliary contact (20) respectively through first working line (22) and second working line (23), main contact (16) and auxiliary contact (20) are disconnected or closure, operating mechanism (21) comprises first support (27), second support (28) and operating grip (32), first support (27) and second support (28) are by first (29), second (30) and the 3rd (31) are fixed together, operating grip (32) is rotatably supported on first (29), and an end of this operating grip (32) connects bolt (33) by first and is connected with first connecting rod (34); First connecting rod (34) connects bolt (35) by second and links with second connecting rod (36); Second connecting rod (36) connects bolt (37) by the 3rd and is connected with third connecting rod (38); The other end of third connecting rod (38) is rotatably supported on second (30);
Wherein, described overcurrent trip (15) acts on operating mechanism (21) by the 4th working line (24), and operating mechanism (21) is threaded off; Described selective protection release (19) acts on operating mechanism (21) by the 5th working line (25), and operating mechanism (21) is threaded off; After operating mechanism (21) was threaded off, main contact (16) and auxiliary contact (20) disconnected simultaneously.
2. selective protection switch as claimed in claim 1 is characterized in that,
When distribution system generation overload current, act on push rod on the operating mechanism (21) by the 4th working line (24) after described overcurrent trip (15) time-delay a period of time, operating mechanism (21) is threaded off, main contact (16) and auxiliary contact (20) all disconnect, and play the protective feature of overload long delay;
When distribution system is short-circuited electric current, electromagnetic mechanism (17) on the major loop (11) moves and touches on the bridge in the master of operating mechanism (21) by the 3rd working line (26) momentary action, main contact (16) is disconnected and maintain open position, and auxiliary contact this moment (20) still is kept closed, short circuit current is transformed into subsidiary loop (12) from major loop (11) and upward and by current-limiting resistance (18) carries out current limliting, if after the miniature short-circuiting device that connects can in time fix a breakdown, electromagnetic mechanism (17) on the major loop (11) stops action so, and main contact (16) is returned to closure state; If after the miniature circuit breaker that connects can not fix a breakdown; act on push rod on the operating mechanism (21) by the 5th working line (25) after selective protection release (19) time-delay a period of time so; operating mechanism (21) is threaded off; main contact (16) and auxiliary contact (20) disconnect, and play the protective feature of short circuit short time delay.
3. selective protection switch as claimed in claim 1 is characterized in that, described operating mechanism (21) also comprises:
Have first convex shoulder (41), first through hole (50) and first bent over arms (84) on described first support (27), this first support (27) also comprises an additional bent over arms (85);
Have second convex shoulder (42), second through hole (51) and second bent over arms (81) on described second support (28), wherein first convex shoulder (41), first through hole (50) and first bent over arms (84) and second convex shoulder (42), second through hole (51) and second bent over arms (81) are respectively in correspondence with each other.
4. selective protection switch as claimed in claim 3 is characterized in that, described operating mechanism (21) also comprises:
Locking-bar (39), one end of described locking-bar (39) has a through hole (40), first convex shoulder (41) on this through hole (40) and first support (27) and second convex shoulder (42) on second support (28) match, and make locking-bar (39) be rotatably supported on first support (27) and second support (28); The other end of locking-bar (39) has a crescent groove (43), and second connects bolt (35) slides in crescent-shaped slot (43); Locking-bar (39) has a convex shoulder (46) at this end with crescent-shaped slot (43);
Tripping bar (44), one end of described tripping bar (44) is rotatably supported on first (29), the other end has a rectangular through slot (45), and the convex shoulder (46) on the described locking-bar (39) abuts against on the rectangular through slot (45), so operating mechanism constitutes snap close in snap close position (47);
Push rod (48), the core of push rod (48) has a protruding axle (49), this protruding axle (49) is fixed in first through hole (50) and second through hole (51) on first support (27) and second support (28), and can be around the rotation of the center of first through hole (50), second through hole (51); One end of push rod (48) has a U-shaped chute (52), and tetrad connects bolt (54) and slides in this U-shaped chute (52), and described tetrad connects bolt (54) and is fixed on tripping bar (44) upward near in the third through-hole (53) of rectangular through slot (45);
First torsion spring (55) is housed in the operating grip (32), and first torsion spring (55) has two arms, and wherein the first arm (56) acts on the operating grip (32), and second arm (57) acts in the groove on the tripping bar (44).
5. selective protection switch as claimed in claim 4 is characterized in that, described operating mechanism (21) also comprises:
The same third connecting rod of the 4th connecting rod (58) (38) equally is fixed on the 3rd and connects on bolt (37) and second (30), the 4th connecting rod (58) separates by second support (28) between the 4th connecting rod (58) and the third connecting rod (38) along with third connecting rod (38) together moves; Third connecting rod (38) and the 4th connecting rod (58) have two sidewalls that are parallel to each other respectively separately, and two sidewalls of third connecting rod (38) are connected by the first nose frame (59), and two sidewalls of the 4th connecting rod (58) are connected by the second nose frame (60);
The 5th connecting rod (61), profile takes the shape of the letter U, and the 5th connecting rod (61) has two sidewalls, and two sidewalls are connected by the 3rd nose frame (62); On two sidewalls of the 5th connecting rod (61) through hole is arranged, by through hole be rotatably mounted in two sidewalls of third connecting rod (38), on second (30);
Second torsion spring (63) is fixed in two sidewalls of the 5th connecting rod (61), on second (30), it has two arms, the first arm (64) is fixed in the 3rd bent over arms (65) on third connecting rod (38) the first nose framves (59), and second arm (66) is fixed in the 4th bent over arms (67) on the 5th connecting rod (61); Under the effect of second torsion spring (63), two sidewalls of the 5th connecting rod (61) abut against on the first nose frame (59) of third connecting rod (38);
First touches bridge (68), is riveted on the 3rd nose frame (62) of the 5th connecting rod (61), and first end that touches bridge (68) is the moving contact (69) of main contact (16);
Second core that touches bridge (70) has a through hole, by through hole be rotatably mounted in two sidewalls of the 4th connecting rod (58), on second (30); The 3rd torsion spring (71) is fixed in two sidewalls of the 4th connecting rod (58), on second (30), it has two arms, the first arm (72) is fixed in the 5th bent over arms (73) on the 4th connecting rod (58) the second nose framves (60), and second arm (74) is fixed on second and touches in the groove (75) of bridge (70); Under the effect of the 3rd torsion spring (71), second end (76) that touches bridge (70) abuts against on the second nose frame (60) of the 4th connecting rod (58); Second other end that touches bridge (70) is the moving contact (77) of auxiliary contact (20).
6. selective protection switch as claimed in claim 5 is characterized in that, described operating mechanism (21) also comprises:
The first contact indicating device (78) is fixed on the sidewall of the 4th connecting rod (58);
The second contact indicating device (88) is installed in the switch housing;
Extension spring (79) has two earrings, and first earrings (80) is hooked on second bent over arms (81) on second support (28), and second earrings (82) is hooked on the 6th bent over arms (83) of third connecting rod (38) one sidewalls;
This operating mechanism (21) is made into an independently module, is fixed in the selective protection switch shell by first bent over arms (84) on first support (27) and additional bent over arms (85).
7. selective protection switch as claimed in claim 6 is characterized in that,
When clockwise rotating operating grip (32) when operating mechanism (21) is closed a floodgate, operating grip (32) drives first connecting rod (34), first connecting rod (34) and drives second connecting rod (36), second connecting rod (36) and drive pulling force that third connecting rod (38) and the 4th connecting rod (58) overcome extension spring (79) simultaneously and make main contact moving contact (69) and auxiliary contact moving contact (77) the direction closure towards main contact fixed contact (86) and auxiliary contact fixed contact (87); The clearance between open contacts of auxiliary contact (20) is less than the clearance between open contacts of main contact (16), and auxiliary contact (20) is prior to main contact (16) closure, and the back disconnects in main contact (16), makes switch reduce the scaling loss of electric arc to main contact (16) when normal occlusion, separating brake;
The second contact indicating device (88) is installed in the switch housing; When operating mechanism (21) closes a floodgate, the first contact indicating device (78) is along with the 4th connecting rod (58) rotates around second (30) together, when operating mechanism (21) closed a floodgate fully, the second contact indicating device (88) and the first contact indicating device (78) indication operating mechanism (21) closed a floodgate;
When operating mechanism (21) closed a floodgate fully, first line that connects bolt (33) and first (29) connects bolt (33) with first and second line that connects bolt (35) forms an obtuse angle, and it is worth between 168 ° to 172 °; At this moment, the contact pressure of main contact (16) and auxiliary contact (20) is provided by second torsion spring (63) and the 3rd torsion spring (71) respectively.
8. selective protection switch as claimed in claim 7 is characterized in that,
When distribution system generation overload current, overcurrent trip (15) time-delay a period of time acts on the push rod (48), push rod (48) is rotated in a clockwise direction, connecing bolt (54) by last U-shaped chute (52) drive of push rod (48) tetrad makes tripping bar (44) rotate around first (29) clockwise direction, because the convex shoulder (49) on the locking-bar (39) loses supporting, therefore locking-bar (39) is around first support (27) and last first convex shoulder of second support (28) (41) and second convex shoulder (42) rotation counterclockwise, operating mechanism (21) is rapid drop-away reset under the effect of extension spring (79) and first torsion spring (55), plays the protective feature of overload long delay;
When distribution system is short-circuited electric current, electromagnetic mechanism (17) on the major loop (11) moves and acts on first and touches on the arm (89) of bridge (68), main contact (16) is in disconnect and maintains open position, and subsidiary loop this moment (20) still is kept closed, short circuit current is transformed into subsidiary loop (12) from major loop (11) and upward and by current-limiting resistance (18) carries out current limliting, if after the miniature short-circuiting device that connects can in time fix a breakdown, electromagnetic mechanism (17) on the major loop (11) stops action so, and main contact (16) is returned to closure state; If after the miniature circuit breaker that connects can not fix a breakdown; selective protection release (19) acted on the push rod (48) after time-delay a period of time so; operating mechanism (21) is threaded off, and main contact (16) and auxiliary contact (20) disconnect, and play the protective feature of short circuit short time delay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100326091A CN101488423B (en) | 2008-01-14 | 2008-01-14 | Selective protection switch and operation mechanism thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100326091A CN101488423B (en) | 2008-01-14 | 2008-01-14 | Selective protection switch and operation mechanism thereof |
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| CN101488423A CN101488423A (en) | 2009-07-22 |
| CN101488423B true CN101488423B (en) | 2011-06-01 |
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| CN2008100326091A Active CN101488423B (en) | 2008-01-14 | 2008-01-14 | Selective protection switch and operation mechanism thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013251076A (en) * | 2012-05-30 | 2013-12-12 | Panasonic Corp | Circuit breaker |
| CN104332365B (en) * | 2014-11-17 | 2016-08-17 | 法泰电器（江苏）股份有限公司 | The short delayed releasing mechanism of selective protection formula miniature circuit breaker |
| CN205160040U (en) * | 2015-11-04 | 2016-04-13 | 余姚市嘉荣电子电器有限公司 | Earth -leakage protector with automatic power supply and outage function |
| CN105680412B (en) * | 2016-03-04 | 2018-03-20 | 常州东方铁路器材有限公司 | A kind of intelligent self-recovery overcurrent protector and its method of work |
| CN115036184A (en) * | 2021-03-05 | 2022-09-09 | 上海电器科学研究所（集团）有限公司 | Operating mechanism for circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2371662Y (en) * | 1999-04-05 | 2000-03-29 | 机械工业部上海电器科学研究所 | Low-voltage knife-shaped isolator |
| CN1617405A (en) * | 2004-12-03 | 2005-05-18 | 上海电器科学研究所（集团）有限公司 | Selective switch with selective protective module |
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- 2008-01-14 CN CN2008100326091A patent/CN101488423B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2371662Y (en) * | 1999-04-05 | 2000-03-29 | 机械工业部上海电器科学研究所 | Low-voltage knife-shaped isolator |
| CN1617405A (en) * | 2004-12-03 | 2005-05-18 | 上海电器科学研究所（集团）有限公司 | Selective switch with selective protective module |
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| Title |
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| JP特开2006-12614A 2006.01.12 |
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Owner name: SHANGHAI DIANKE SCIENCE CO., LTD. Free format text: FORMER OWNER: SHANGHAI ELECTRICAL APPLIANCES SCIENCE INST. (GROUP) CO., LTD. Effective date: 20090911 |
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Effective date of registration: 20090911 Address after: Number 505, Wuning Road, Shanghai, 200063 Applicant after: Shanghai Electric Electric Appliance Technology Co., Ltd. Co-applicant after: Shanghai Electric Ceramic Works Co., Ltd. Co-applicant after: Foretech Elec. App. (Jiangsu) Corp., Ltd. Address before: Number 505, Wuning Road, Shanghai, 200063 Applicant before: Shanghai Electrical Science Research Institute (Group) Co., Ltd. Co-applicant before: Shanghai Power Transmission & Distribution Co., Ltd. Co-applicant before: Foretech Elec. App. (Jiangsu) Corp., Ltd. |
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