CN1520602A

CN1520602A - Insertion type circuit breaker

Info

Publication number: CN1520602A
Application number: CNA028091507A
Authority: CN
Inventors: 川上兼弘; 石川晶
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-05-22
Filing date: 2002-05-22
Publication date: 2004-08-11
Anticipated expiration: 2022-05-22
Also published as: JP4057010B2; CN1302503C; EP1507275B1; DE60239108D1; EP1507275A1; WO2003098652A1; EP1507275A4; TWI222094B; JPWO2003098652A1

Abstract

An insertion type circuit breaker comprises a trip rod which actuates an on/off contactor for opening and closing a circuit carrying a load current and a trip mechanism for opening this on/off contactor, a lever which acts on the trip rod when a breaker main body is inserted into a mount base or removed from the mount base, an elastic member which energizes this lever, and a lock mechanism part which locks the lever by resisting the energization force of the elastic member when the breaker main body is out of the mount base. Thus, this circuit breaker facilitates on/off check ever when the braker main body is out of the mount base and makes intrinsic trip actions when the braker main body is inside the mount base with the trip rod fixed, and when out of the mount base.

Description

The insert type circuit-breaker

Technical field

The present invention relates to the breaker body insert type circuit-breaker installed and removed of mount pad relatively, relate in particular to have and when mounting or dismounting, make the insert type circuit-breaker that opens and closes the contact open circuit and make the safe tripgear that load current disconnects.

Background technology

Fig. 8 be expression will be for example the breaker body of the circuit-breaker of insert type in the past shown in No. 01/27959 communique of WO be inserted in the longitudinal section of the major part of state behind the mount pad.

Fig. 9 be with Fig. 8 in constitute the insert type circuit-breaker safe tripgear release gear portion engage amplification view after being removed, (a) be the Zoom Side cutaway view, (b) being the top major part cutaway view of (a), (c) is the amplification perspective interior view of the chimerism of expression trip(ping) bar and shell.

In Fig. 8, breaker body 1 has: in the shell of shaping insulant, be equipped with utilize pressing spring 2 effect in accordance with regulations contact pressure kept, as connecting flaring connector 3, being connected the insertion terminal 4 of usefulness member as the terminal of mains side and load side with contact member; Be installed in the power supply side terminal 5 and the load side terminal 6 that insert on the terminal 4 respectively; The switching contact (not shown) that between power supply side terminal 5 and load side terminal 6, be electrically connected, the circuit of convection current overload electric current opens and closes; The open-close mechanism section (not shown) that this switching contact is opened and closed; When in circuit, flowing through overcurrent, make the release gear portion (not shown) of this switching mechanism switching portion action; But and pass through manual and the handle 1a of portion of controlled opening/closing mechanism.

Inserting on the mount pad 7 of breaker body 1, setting the insertion base 8 that constitutes by the shaping insulant and be connected external conductor 9 and as inserting the insertion projection 10 of the terminal component that is connected with connector 3 the both sides of mains side that inserts base 8 and load side.

The 11st, the projection cover is used for fixing and insulating inserting projection 10.

The 12nd, the trip shaft of the part of formation release gear portion utilizes spring (not shown) to the clockwise direction application of force, when flowing through overcurrent in circuit, rotates ormal weight (arrow F12 direction) and makes open-close mechanism section (not shown) action to counter clockwise direction.

The 13rd, as the trip(ping) bar of the actuating member of triping, one end 13a engages with trip shaft 12 with moving about, other end 13b and the protuberance 8a butt that is provided on the insertion base 8.The 14th, to the compression spring that inserts the base 8 side application of forces, 15 (as shown in Figure 9) were the shells that is provided in the periphery of trip(ping) bar 13, compression spring 14 to trip(ping) bar 13, utilized trip(ping) bar 13, compression spring 14, shell 15 to constitute safe tripgear.

In the insert type circuit-breaker in the past of above structure, be installed at breaker body 1 under the state of mount pad 7, the other end 13b of trip(ping) bar 13 and protuberance 8a butt, because trip(ping) bar 13 is pressed by trip shaft 12 thrusters, so an end 13a of trip(ping) bar 13 does not act on the press section 12a of trip shaft 12, therefore, the switching contact of breaker body 1 is a closed circuit state, passes through load current.

As mentioned above, passing through under the state of electric current, when to breaker body 1 during from action that mount pad 7 is dismantled, utilize the effect of compression spring 14 and make trip(ping) bar 13 to inserting base 8 side shiftings, one end 13a works to the press section 12a of trip shaft 12, trip shaft 12 is rotated to the F12 direction, make the switching mechanism action and make connector 3 and inserting before projection 10 leaves, make to open and close the contact open circuit and load current is disconnected.

In addition, the other end 13b of trip(ping) bar 13 is rotated roughly 90 degree with screwdriver etc., when the state that makes as shown in Figure 9, at the protuberance 13c of trip(ping) bar 13 after facial 15b moves on the shell 15, and end 13a trip(ping) bar 13 chimeric with recess 15c also rotates roughly 90 degree, owing to engage and trip(ping) bar 13 can not move to arrow F13 direction, so an end 13a does not work with regard to the press section 12a to trip shaft 12 with the press section 12a of trip shaft 12.

Under such state, because the protuberance 13c of trip(ping) bar 13 and the recess 15c of shell 15 are chimeric, can not be in this rotated position, at trip(ping) bar 13 owing to utilize compression spring 14 that protuberance 13c is pushed to recess 15c, so the end 13a at trip(ping) bar 13 fixes with the engaging under the state that is disengaged of press section 12a of trip shaft 12, can utilize handle 1a controlled opening/closing portion of mechanism under the state of mount pad 7 dismounting and split closed contact and carry out open and close controlling at breaker body 1.

The circuit-breaker of insert type in the past of above structure, in the closed circuit state of the switching contact of breaker body 1, can carry out the state of open and close controlling, when promptly under the state that trip(ping) bar 13 is fixing, being inserted in breaker body 1 on the mount pad 7, electric arc so take place in the action because safe tripgear is triped when connector 3 contacts with insertion projection 10.

In addition, also action during with breaker body 1 dismounting of inserting under the state that trip(ping) bar 13 is fixed because safe tripgear is not triped, so when connector 3 is left from inserting projection 10 problem of existence generation electric arc.

Summary of the invention

The present invention makes in order to address the above problem, its purpose is, obtains following a kind of insert type circuit-breaker: though under the state that breaker body is dismantled from mount pad, also can carry out easily open and close controlling and can carry out the state of open and close controlling, promptly under the state that trip(ping) bar is fixing with breaker body when mount pad inserts or with breaker body when mount pad is dismantled, safe tripgear can carry out the original action of triping.

Insert type circuit-breaker of the present invention, have: breaker body, the switching contact that its circuit with convection current overload electric current opens and closes, make this switching contact open circuit release gear portion with load current is used contact member to being connected of described circuit guiding; And have to connect external conductor and insert and connect described connection with the terminal component of contact member and the mount pad of described breaker body is installed, and have: the trip(ping) bar that described release gear portion is moved; The bar that when described breaker body is inserted described mount pad or with described breaker body, when described mount pad is dismantled, to described trip(ping) bar, works; Elastic component to this bar application of force; Described breaker body when described mount pad is dismantled, overcome described elastic component the application of force and with the locking mechanism portion of described rod lock, and safe tripgear with following structure: when it inserts described mount pad at the described breaker body that with described switching contact is closed circuit state, described connection with contact member with before described terminal component contacts, described locking mechanism portion removed and make the described trip(ping) bar of described pole pair work, make the action of described release gear portion to make described switching contact open circuit according to the application of force of described elastic component; Its with described switching contact be the described breaker body of closed circuit state when described mount pad is dismantled, described terminal component with described be connected leave with contact member before, make the described trip(ping) bar of described pole pair work, make the action of described release gear portion to make described switching contact open circuit according to the application of force of described elastic component.

Thus, even under the state that breaker body is dismantled from mount pad, also can carry out open and close controlling easily, and can carry out the state of open and close controlling, promptly under the state that trip(ping) bar is fixing with breaker body when mount pad inserts or with breaker body when mount pad is dismantled, safe tripgear also can carry out the original action of triping.

Preferably, described locking mechanism portion comprises: be provided in the protrusions snap portion on the breaker body; The arm that described breaker body engages with described mount pad when inserting mount pad; The projection of described breaker body being ended when mount pad is dismantled, by described protrusions snap portion card and breaking away from from described protrusions snap portion with engaging of described arm according to described mount pad when being inserted into mount pad.

Preferably, described bar has at one end cylindrical portion that trip(ping) bar is worked and the projection that engages with mount pad at the other end, intercalation is rotated freely as fulcrum and by elastic component at the pin of substantial middle portion keep.

Thus, can carry out the locking and the releasing locking of locking mechanism portion reliably.

In addition, make centre distance between pin and the cylindrical portion, and described pin and projection between centre distance be in a ratio of roughly the same or bigger.

Thus, with breaker body when mount pad is pulled out, even the either party of mains side and load side is pulled out,, also can make to open and close the contact open circuit and make the load current disconnection as connecting before connector with contact member leaves insertion projection 10 as terminal component.

In addition, with described projection, make tilted shape with the contact-making surface of protrusions snap portion.

Thus, projection breaks away from from protrusions snap portion easily when breaker body inserts, the intensity in the time of guaranteeing protrusions snap.

The simple declaration of accompanying drawing

Fig. 1 is the major part longitudinal section that unloads state behind the breaker body of insert type circuit-breaker of the invention process form 1 from mount pad.

Fig. 2 is the top major part cutaway view of the breaker body of Fig. 1.

Fig. 3 is the amplification stereogram of safe tripgear of the insert type circuit-breaker of the invention process form 1.

Fig. 4 is the major part longitudinal section that mount pad midvoyage condition is inserted the breaker body of the insert type circuit-breaker of the invention process form 1 in expression.

To be expression insert the major part longitudinal section of state behind the mount pad with the breaker body of the insert type circuit-breaker of the invention process form 1 to Fig. 5.

Fig. 6 is the top major part cutaway view of Fig. 5.

Fig. 7 is the following major part cutaway view of Fig. 5.

Fig. 8 be expression will be in the past the breaker body of insert type circuit-breaker insert the major part longitudinal section of state behind the mount pad.

Fig. 9 be with the amplification view after removing of engaging of the release gear portion of the safe tripgear of Fig. 8, (a) be the Zoom Side cutaway view, (b) being the top major part cutaway view of (a), (c) is the amplification perspective interior view of the chimerism of expression trip(ping) bar and shell.

Symbol description among the figure

The 1st, breaker body, 1a are handles, the 2nd, and pressing spring, the 3rd, connector (connect and use contact member), the 4th, insert terminal, the 5th, power supply side terminal, the 6th, the load side terminal, the 7th, mount pad, the 8th, insert base, 8a is the arm holding section, and 8b is the bar holding section, the 9th, and external conductor, the 10th, insert projection (terminal component), the 11st, projection cover, the 12nd, trip shaft (release gear portion), the 15th, middle actuator, 15a is an axle, the 20th, safe tripgear, the 21st, trip(ping) bar, 21a are insert openings, and 21b is a leading section, the 22nd, bar, 22a are through holes, and 22b is a cylindrical portion, 22c is an arm, and 22d is a projection, and 22e is the portion of being convexly equipped with, the 23rd, torsion spring, the 24th, trip bolt, the 25th, carriage, 25a is a through hole, and 25b is a through hole, and 25c is a connecting hole, 25d is a protrusions snap portion, the 26th, and pin, the 30th, locking mechanism.

Embodiment

[example 1]

Fig. 1 is the major part longitudinal section that unloads state behind the breaker body of insert type circuit-breaker of the invention process form 1 from mount pad, Fig. 2 be from load side see Fig. 1 breaker body above the major part cutaway view, Fig. 3 is the amplification stereogram of safe tripgear of the insert type circuit-breaker of the invention process form 1.

In Fig. 1 and Fig. 2, breaker body 1 has: in the shell of shaping insulant, be installed with the effect that utilizes pressing spring 2 by the contact pressure of regulation kept, as connect with the flaring connector 3 of contact member, be connected the insertion terminal 4 of using member as the terminal of mains side and load side; Be installed in the power supply side terminal 5 and the load side terminal 6 that insert on the terminal 4 respectively; The switching contact (not shown) that between power supply side terminal 5 and load side terminal 6, be electrically connected, the circuit of convection current overload electric current opens and closes; The open-close mechanism section (not shown) that this switching contact is opened and closed; When in circuit, flowing through overcurrent, make the release gear portion (not shown) of this switching mechanism switching portion action; But and pass through manual and the handle 1a of portion of controlled opening/closing mechanism.

Inserting on the mount pad 7 of breaker body 1, setting that the insertion base 8 that is made of the shaping insulant is connected external conductor 9 with both sides in mains side that inserts base 8 and load side and as inserting the insertion projection 10 of the terminal component that is connected with connector 3.

The 12nd, the trip shaft of the part of formation release gear portion utilizes spring (not shown) to the counter clockwise direction application of force, rotates ormal weight (arrow F1 direction) and makes open-close mechanism section (not shown) action to counter clockwise direction when flowing through overcurrent in circuit.

The 15th, be fulcrum and rotating so that the middle actuator of trip shaft 12 actions with trip(ping) bar described later 21 interlocks, with axle 15a to arrow F2 direction.

In Fig. 3, the 20th, safe tripgear, its structure has: the trip(ping) bar 21 that actuator 15 rotates in the middle of making; At the bar 22 that breaker body 1 is worked to trip(ping) bar 21 when mount pad 7 unloads when mount pad 7 inserts or with breaker body 1; As the torsion spring 23 that this bar 22 is carried out the elastic component of the application of force; Utilize trip bolt 24 and be fixed on carriage 25 on the breaker body 1; And the through hole 25b of the through hole 22a of the through hole 25a of through bracket 25, bar 22, torsion spring 23, carriage 25 and intercalation are in the substantial middle portion of bar 22 and rotate the pin 26 that freely bar 22 is kept.

Be that fulcrum rotates on the bar 22 that is keeping freely with pin 26, convex with cylindrical portion 22b at the one end to the insert opening 21a of trip(ping) bar 21 intercalation, the other end setting integratedly the arm 22c that breaker body 1 is engaged with mount pad 7 when mount pad 7 inserts reach be provided in carriage 25 on the projection 22d that engages of the 25d of protrusions snap portion of connecting hole 25c.

In addition, one end 23a of torsion spring 23 is blocked only on the spring fastener 25e of carriage 25, other end 23b is blocked only on the 22e of the portion that is convexly equipped with that is convexly set on the bar 22, to bar 22 to the arrow F3 direction application of force, when breaker body 1 was inserted mount pad 7, arm 22c engaged with mount pad 7, when projection 22d when the 25d of protrusions snap portion breaks away from, bar 22 rotates to arrow F3 direction, bar 22 to arrow F4 direction move and the leading section 21b of trip(ping) bar 21 act in the middle of actuator 15a.

In addition, in said structure, will be provided in the 25d of protrusions snap portion of the connecting hole 25c on the carriage 25, the arm 22c that when breaker body 1 is inserted mount pad 7, engage, breaker body 1 is being called locking mechanism portion 30 according to mount pad 7 with the projection 22d that breaks away from from the 25d of protrusions snap portion that engages of arm 22 by the 25d of protrusions snap portion card during only or at insertion mount pad 7 during from mount pad 7 dismountings with the arm holding section 8a of mount pad 7 described later.

Insert type circuit-breaker with safe tripgear 20 of above structure, under the state that breaker body 1 is unloaded from mount pad 7, the projection 22d of the bar 22 of safe tripgear 20 with lock-out state that the 25d of protrusions snap portion of carriage 25 engages under, because actuator 15 in the middle of trip(ping) bar 21 does not act on, so the switching that can utilize handle 1a controlled opening/closing portion of mechanism and split closed contact is controlled.

To be expression insert the major part longitudinal section of state behind the mount pad with the breaker body of the insert type circuit-breaker of the invention process form 1 to Fig. 5, Fig. 6 be from load side see Fig. 5 breaker body above the major part cutaway view, Fig. 7 be from mains side see Fig. 5 breaker body below the major part cutaway view.

Then, with Fig. 4～Fig. 7 the action of state when mount pad 7 inserts after breaker body 1 is dismantled from mount pad 7 described.

When with breaker body 1 when mount pad 7 inserts, be connected with conduct before connector 3 contacts of using contact member at insertion projection 10 as terminal component, the arm 22c of bar 22 is subjected to the power of arrow F5 direction with engaging at the arm holding section 8a that inserts formation on the base 8, projection 22d breaks away from from the 25d of protrusions snap portion, bar 22 utilizes the application of force of torsion spring 23 and rotates, trip(ping) bar 21 moves to arrow F6 direction and makes leading section 21b act on middle actuator 15, and be that fulcrum rotates to arrow F7 direction with axle 15a, trip shaft 12 is rotated to arrow F8 direction, and make the switching mechanism action, open and close the contact open circuit to disconnect load current thereby make.

In addition, this moment, bar 22 moved to arrow F9 direction (as shown in Figure 5) because of the application of force of torsion spring 23, and the 22e of the portion that is convexly equipped with of bar 22 and the bar holding section 8b butt that forms on insertion base 8.

When breaker body 1 further inserts, connector 3 with insert projection 10 and contact after, by intercalation connector 3 and insertion projection 10 are electrically connected, utilize pressing spring 2 connector 3 and insertion projection 10 to be kept in touch with the contact pressure of regulation, and utilize the 22e of the portion that the is convexly equipped with push strut holding section 8b of bar 22, overcome the application of force of torsion spring 23 and bar 22 rotates to arrow F10 direction (as shown in Figure 7), (Fig. 5～Fig. 7) is moved in the position of trip(ping) bar 21 actuator 21 in the middle of not acting on.

Action when then, the breaker body 1 in the mount pad 7 that will insert above structure being pulled out describes.

Action when breaker body 1 is pulled out, carry out with the operation opposite with above-mentioned insert action, when breaker body 1 is pulled out, rotated to arrow F11 direction (as shown in Figure 7) by torsion spring 23 application of forces with the 22e of the portion that is convexly equipped with that is formed on the bar 22 that inserts the bar holding section 8b butt on the base 8, trip(ping) bar 21 moves to arrow F6 direction (as shown in Figure 4), actuator 21 in the middle of its leading section 21b acts on, and be that fulcrum rotates to arrow F7 direction with axle 15a, trip shaft 12 is rotated to arrow F8 direction, before insertion projection 10 leaves, make switching contact open circuit and load current is disconnected at connector 3.

In addition, in Fig. 7, c is the centre distance between pin 26 positions and the cylindrical portion 22b, and d is pin 26 positions and is convexly equipped with centre distance between the 22e of portion that the relation of c and d is configured to d≤c.By making like this, owing to become big relative to the angle of bar 22 rotations, the size that moves of trip(ping) bar 21, so with breaker body 1 when mount pad 7 is pulled out, even the either party of mains side and load side is pulled out, before insertion projection 10 leaves, also can make switching contact open circuit and load current is disconnected at connector 3.

In addition, in Fig. 3, the size of the projection 22d that engages with the 25d of protrusions snap portion is, for projection 22d when breaker body 1 is pulled out easily the intensity when the 25d of protrusions snap portion breaks away from and guarantee projection 22d engaging will be made as a, will be made as b than the size in distally near the size of the projection 22d of side with pin 26 positions with pin 26 positions, and set the taper of a＜b for.

Utilizability on the industry

As mentioned above, insertion type circuit breaker of the present invention can be applicable to when the relative mount pad of breaker body is installed and removed and can split reliably the breaker that closed contact is opened a way.

Claims

1, a kind of insert type circuit-breaker, have: breaker body (1), the switching contact that its circuit with convection current overload electric current opens and closes, make the release gear portion of this switching contact open circuit with load current being connected to described circuit guiding with contact member (3); And have connection external conductor (9) and insert to connect described connection with the terminal component (10) of contact member (3) and the mount pad (7) of described breaker body (1) is installed, it is characterized in that having: the trip(ping) bar (21) that makes the action of described release gear portion; The bar (22) that when described breaker body (1) is inserted described mount pad (7) or with described breaker body (1), described trip(ping) bar (21) is worked when described mount pad (7) is dismantled; Elastic component (23) to this bar (22) application of force; With described breaker body (1) when described mount pad (7) is dismantled, overcome described elastic component (23) the application of force and with the locking mechanism portion (30) of described bar (22) locking, and safe tripgear (20): when it inserts described mount pad (7) at the described breaker body (1) that with described switching contact is closed circuit state with following structure, before described connection is used contact member (3) and described terminal component (10) is contacted, described locking mechanism portion (30) is removed and described bar (22) is worked to described trip(ping) bar (21), make described release gear portion (12) action and make described switching contact open circuit according to the application of force of described elastic component (23); It is being that the described breaker body (1) of closed circuit state is when described mount pad (7) is dismantled with described switching contact, described terminal component (10) with described be connected leave with contact member (3) before, according to the application of force of described elastic component (23) described bar (22) is worked to described trip(ping) bar (21), make described release gear portion (12) action and make described switching contact open circuit.

2, insert type circuit-breaker as claimed in claim 1, it is characterized in that, described locking mechanism portion (30) comprises the protrusions snap portion (25d) that is provided on the breaker body (1), the arm (22c) that when described breaker body (1) is inserted mount pad (7), engages with described mount pad (7), when described breaker body (1) being ended by described protrusions snap portion (25d) card when mount pad (7) is dismantled and is inserted into described mount pad (7) according to described mount pad (7) with engaging of described arm (22c) projection (22d) from described protrusions snap portion (25d) disengaging.

3, insert type circuit-breaker as claimed in claim 1, it is characterized in that, described bar (22), have at one end cylindrical portion (22b) that trip(ping) bar (21) is worked and the projection (22d) that engages with mount pad (7) at the other end, and intercalation rotated freely as fulcrum and by elastic component (23) at the pin (26) of substantial middle portion keep.

4, insert type circuit-breaker as claimed in claim 3 is characterized in that, described pin (26) is compared with the centre distance between the projection (22d) with centre distance and described pin (26) between the cylindrical portion (22b), is roughly the same or bigger.

5, insert type circuit-breaker as claimed in claim 2 is characterized in that, described projection (22d), make taper with the contact-making surface of protrusions snap portion (25d).