JPH03184228A - Remote controlled circuit breaker - Google Patents

Abstract

PURPOSE:To lessen fluctuation of the transmitted force from a control lever to a transmission lever of an electromagnetic part by accomplishing engagement of the two levers by the use of a mechanism which does not sink the transmission force. CONSTITUTION:A roller 101 is caulked to a control lever 63 rotatably by a pin 102, other points remaining the same as any conventional arrangement. The motions of the roller 101 are also the same as conventional, provided that it generates rolling frictions to smoothen transmission of the force. If the roller 101 is arranged in this manner as a mechanism not reducing the transmission force, the influence of friction force upon the load transmission from the control lever 63 to transmission lever 34 can be reduced to ignorable level. This permits accomplishment of a remotely controllable circuit breaker with stable operation, wherein the transmission force is with minor fluctuation an the wear is less.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a remote-controlled circuit breaker that has both the circuit breaker's original breaking function and a high-frequency, long-life switching function.

[Conventional technology]

This is the 14th conventional remote control circuit breaker of this kind.
Japanese Patent Application No. 63-252310 shown in No. 20 has been proposed. Fig. 14 is a side cross-sectional view showing a state in which the control handle is off and the remote control is off, Fig. 15 is a front view with the group cover shown in Fig. 14 partially removed, and Fig. 16 is a side view showing the state in which the back cover shown in Fig. 14 is removed. Figure 17 is a schematic diagram of Figure 14 showing the state where the control handle is auto and the remote control is off;
FIG. 18 is a schematic diagram of FIG. 14 showing a state in which the control handle is auto and remote control is on, FIG. 19 is a schematic diagram of FIG. 14 showing a trip state, and FIG. 20 is an exploded perspective view of the electromagnetic section.

In the figure, (1) is the circuit breaker case, and the front cover (2)
It consists of a base (3) and a back cover (4).

(6) is a power supply side terminal that is press-fitted into the base and is equipped with a terminal screw (7) for connecting an external line. (a is a power supply side stator held on the back side of the base (3); One end is connected to the power supply side terminal (6) with a screw (7a). (
9) is a power supply side fixed contact welded to the other end of the power supply side stator (a), (10) is a mover having an electric ism movable contact (11) and a load side movable contact (12) on both left and right sides, (13) ) is a mover holder made of an insulator, and the mover (10) is
・Meai is maintained. (14) is a cross bar spanning each pole, and a movable element holder (13) is slidably fitted and housed in its groove (14a).

(15) is a push spring that biases the movable element (10) in the closing direction, and the spring receiver of the back cover (4) is housed in the part (5). (16) is a load-side fixed contact that faces the load-side movable contact (12), and is welded to the load-side stator (17). (18A).

(18E) is an arc-extinguishing part arranged on both the left and right sides of the movable element holder (13), which is surrounded by an insulating plate (18a) and an exhaust plate (18b) and has a glyphed (18a) made of a magnetic material. . (19) is the base (3) and back cover (4)
An exhaust hole (20) is provided in the exhaust passage formed by the above.

Reference numeral (21) denotes a mounting bracket, which is slidably held on the back cover (4) and urged rightward by a spring (22).

As described above, the contact parts (8) to (17) are housed in the space formed between the base (3) and the back cover (4), and the crossbar (14) is connected to the base (so-called opening). (23)
It is connected to the upper part.

Next, on the power supply side terminal (6) side on the front side of the base (3),
An electromagnetic part (200) is fixed to the base (marked) by a screw (24). As shown in FIG. The hole (26a) of the fill (26) and the opening g (2) of the magnet frame (25) are inserted from the top.
5a).

(25b), the legs (28&) to (28c) of the fixed core (28) to which the bear removal coil (27) is fixed are respectively inserted, and the notch (28a) of the fixed core (28) is inserted.
), (28a) and the magnet frame (25) to prevent the fixed core (28) from coming off the magnet frame (25) and to prevent the movable core (30) from coming off the magnet frame (25).
) to absorb impact force. The movable core (30) is fixed to the holder (31) by a stopper (32), and each bearing part (3) is provided at both ends of the holder (31).
1&), and is rotatably held by each shaft (33) in each bearing portion (34a) of the transmission lever (34). Further, the transmission lever (34) is supported by the magnet frame (25) by a shaft (35), and each projection (34b) of the transmission lever (34) and each projection (25Q) of the magnet frame (25) are connected to each other. Each tension spring (36) applied between the movable core (30) and the fixed core (28) biases the movable core (30) and the fixed core (28) in the direction of opening.

In the figure, (37) and (38) are auxiliary switches, and screws (39)
), (40) are fixed to the magnet frame (25), and each actuator (37 m), (38
a) is arranged to engage with each protrusion (31b) of the holder (31) and to be turned on and off by the movement of the movable iron core (30).

In addition, (41) in the figure is a terminal block, into which a terminal (42) is press-fitted, and is provided with a terminal screw (43) for connecting an external line. In the illustrated example, among six sets of three terminals (42), two sets of four terminals (42) at both ends are auxiliary switches (37),
(38) is connected to the lead IJ (44) and used as a terminal block for the auxiliary switch.
One of the two terminals (42) is a limit switch (
45) to the fill (26) and the other directly to the coil (26). That is, the limit switch (45) and the coil (26) of the electromagnetic section (200) are connected in series. The limit switch (45) is fixed to the magnet frame (25) with screws (46). The terminal screw (43) is attached to the front cover (force opening (47)
) and external electric wires (not shown) are exposed to the outside! The terminal block (41) is connected to each fixed leg (4
1a) so that it can be fixed to the magnet frame (25). (48) is a terminal cover, which prevents the terminal screw (43) of the terminal block (41) from being unnecessarily exposed to the outside.

Next, the control mechanism section (3) is located in the middle part of the front side of the base (3).
00) is placed. (49) is a mechanism frame fixed to the base (3) with screws (49a); (50)
is a control handle that is rotatably supported on the mechanism frame (49) by a shaft (51), and is connected to the opening (52) of the front cover (2).
) and can be manually operated by protruding outward from the inner protrusion (50a), and the internal protrusion (50a) is connected to the link (54) by a pin (53), forming a toggle link mechanism. A roller (55) is rotatably supported at the other end of the link (54). Reference numeral (56) denotes a lever, which is rotatably supported by the mechanism frame (49) on a shaft (51), and its tip is locked with a latch (57). The latch (57) is rotatably supported by the mechanism frame (49) at # (58) and biased counterclockwise by a twist spring (not shown).

(59) is a trip bar rotatably supported by a shaft (60) on the mechanism frame (49), biased clockwise by a twist spring (not shown) and engaged with the latch (57). It has become. (61) is the mechanism frame (
49) is held movably in each U-groove (49b), and is urged upward by a tension spring (62) and a roller (55) is placed on the upper end surface. )
is engaged. (63) is a control lever rotatably supported by a shaft (64) on the mechanism frame (49), one end (63a) engages with the crossbar (14), and the other end (63a) engages with the crossbar (14).
63b) is engaged with the locking portion (34c) of the transmission lever (34) and is also engaged in the hole (81a) of the push plate (61). In FIG. 14, the control handle (50) is in the off state, so the control lever (63) is moved upward by the push plate (61).
) is restrained by a tension spring (62). That is, since the load of the tension spring (62) is greater than the load of the push spring (15) that urges the mover (10), the control lever (63) is held in the state shown in FIG. 14, and both contacts (9) ,
(11), (12), and (16) are separated. Also, at this time, as shown in FIG. 14, the other end of the control lever (63) (
A gap is provided between the locking portion (34a) of the transmission lever (34) and the locking portion (34a) of the transmission lever (34).

Next, on the load side of the front side of the base (a), there is an overcurrent string removal part (400) consisting of a bimetal and a plunger type electromagnet.
is located. (65) is the first yoke, one end (
A load side stator (17) is connected to the load side stator (17) by a screw (66), a bimetal (67) is welded to the load side stator (65a), and an adjustment screw (68) is provided. (69) is a bopin, which is provided with a hollow core (70) and a plunger (71) which are caulked to the first yoke (65). The plunger (71) is urged upward by a detection pusher (72). Also, the tip of the plunger (71) (
71m) is engaged with the U groove (59a) of the trip bar (59), and when the plunger (71) is attracted toward the core (70), the trip bar (59) is rotated against the twisting spring. (73) is a lock extending through the hollow part of the core (70), the hole (74) of the base (3), and the hole (14a) of the crossbar (14) to the mover holder (1o).

Similarly, when the plunger (71) is attracted toward the core (70), the plunger (71) hits the movable element holder (10) through the opening 1 door (73), and both contacts (9) and (1
1), (12), and (16) are separated. (75) is the second yoke crimped to the first yoke (65);
6) is a coil, one end of which is connected to the tip of a bimetal (67) by a flexible copper twist II (77), and the other end connected to a load side terminal (78). A terminal screw (79) for connecting an external line is provided on the load side terminal (78). (80
) is an operating piece that is rotatably supported by the first yoke (65) by a shaft (81), biased counterclockwise by a spring (not shown), and engaged with the trip bar (59). It has a matching arm (80a). The tripping time can be adjusted by rotating the adjusting screw (68).
7) by changing the gap between the tip and the actuating piece (80).

Next, the operation will be explained.

From the OFF state of the control handle (50) shown in FIGS. 14 to 16, when the control handle (50) is tilted to the right and the control handle (50) is placed in the auto position, the link ( 54) is extended and the push plate (61) is lowered against the tension spring (62), releasing the control lever (63). The control lever (63) has contact parts (8) to
The crossbar (14) is pressed by the push spring (15) of (17).
When the electromagnetic part (200) is rotated clockwise through the transmission lever (34) and there is no gap between the electromagnetic part (200) and the transmission lever (34), the transmission lever (34)
4) is stopped by the tension spring (36) that urges it. That is, the tension spring (3) is heavier than the load of the push spring (15).
This is because the design is such that the load of 6) is large.

At this time, the movable element (10) rises to the extent that there is no gap between the transmission lever (34) and the control lever (63), and both contacts (9), (11), and (12') are moved.

The separation distance between (16) is somewhat reduced compared to the states shown in FIGS. 14 to 16.

Then, with the handle auto as shown in Figure 17, turn the electromagnetic section (2
00) is not energized (remote off), limit switch 1
The switch (45) detects the movement of the push plate (61) and is in the on state. When voltage is applied to the terminal (42) from the outside,
The coil (26) is excited and the movable core (30) is attracted to the fixed core (28). In order to release the control lever (63) by rotating the transmission lever (34) together with the movable iron core (30) counterclockwise against the tension spring (36), the movable element (10) is moved by the push spring (15). It rises due to both contacts (9), (11), (12).

(16) closes. FIG. 18 shows the case of excitation (remote turn-on) with the handle automatic. At this time, hold the holder (
The protrusion (31b) of the auxiliary switch (37), (
Press the actuators (37a) (38a) of 38) to operate the contacts of the auxiliary switches (37) (38). Also, the movable iron core (3o) suddenly collides with the fixed iron core (28), or the impact force is absorbed by the spring (29).

Next, in FIG. 18, the voltage application to the terminal (42) is cut off L-', and the movable iron core (30)
) in the opening direction, and the control lever (63) is operated by the transmission lever (34) by the pulling force of the tension spring (36).
is rotated counterclockwise, and the push spring (
15) and both contacts (9), (11), (12)
, (16) are opened, and the state shown in FIG. 17 is returned again.

In this way, the states shown in FIGS. 17 and 18 are repeated, that is, remote control (voltage application) is performed without going through the control mechanism section (300).
The contacts can be opened and closed.

Now, in the on state shown in Figure 18, the current flows to the power supply side terminal (■
→→Source side stator (8)→Power supply side fixed contact (9→Power source side movable point (11)→Mover (10)→Load side movable contact (1)
2) → Load side fixed contact (16) → Load side stator (17)
→ First yoke (65) → Bimetal (67) → Flexible steel [1 (77) → Coil (76) → Load side terminal (78).

When an overcurrent flows in FIG. 18, the bimetal (67) bends to the right, rotates the trip bar (59) counterclockwise through the actuating piece (80) against the twisting spring, and latches. (57) in a clockwise direction against the twisting spring. As the lever (56) is released by the rotation of the latch (57), the push plate (6e) pushes the roller (55) to the left side together with the lever (56) by the tension spring (62) and rises to control the lever (56). Rotate the lever (63) counterclockwise against the push spring (15) until both contacts (
'j), (11), (12), and (16) are released. This trichrome state is shown in FIG. 19.

At this time, the limit switch (45) is also
), the excitation of the fill (26) is eliminated, so the movable iron core (30) is opened in the same way as in the off operation, and both contacts (9) are operated by the control lever (63) via the transmission lever (34). '1. (11), (12),
(16) Transmit force in the direction of opening. That is, the tension spring (62) and the tension spring (36) are connected to the contact portions (8) to (17).
) act on both contacts (9), (11), (1) with a very strong force against the push spring (15).
2) Release (16).

Next, in Fig. 18, when a short circuit current flows, the coil (
76), the plunger (71) is instantly pulled in the direction of the core (70), rotates the trick bar (59) counterclockwise against the twisting spring, and the bimetal (67)
Simultaneously, the plunger (71) hits the movable element holder (13) directly via the rod (73), and both contacts (9) and (11) are triggered.

(12) and (16) are separated. The arc generated between the contacts is the mover (10) and each stator (8).

(17) respectively, and then both arc runners (82), (83) and each stator (a).

(17), and is divided and extinguished by each grid (18c). In addition, each arc extinguishing part (18A).

(18B) The hot gas generated at each exhaust plate (18B)
) through holes (not shown), exhaust passages (19), and exhaust to the outside from each exhaust hole (20).

To reset the control handle (5) from the state shown in Figure 19,
0) to the left (off direction), the lever (56) pushes the roller (55) to the right and engages the latch (57) with the roller (55) placed on the push plate (61) to complete the process.

[Problem to be solved by the invention]

Since the conventional remote-controlled circuit breaker is installed at the bottom of the tank as described above, the control lever (63) and the transmission lever (34) transmit the load while sliding. There is a problem in that the force varies widely, and the wear on both joint surfaces is also large, and when the number of times the contact increases, the movable contact (12) does not return to the predetermined position when turned off, and in some cases cannot be disconnected.

The present invention has been made to solve these problems, and an object of the present invention is to provide a stable remote-controlled circuit breaker with less variation in the transmission force between the control lever and the transmission lever and less wear and tear.

[Means to solve the problem]

In order to achieve the above object, the remote controlled circuit breaker according to the present invention has a transmission lever and a control lever of the m magnetic part.
The engagement is performed by a mechanism that does not reduce the transmission force.

[Effect]

In this invention, the influence of the force on the transmission of load (force) between the control lever and the transmission lever can be reduced to a negligible level by using a mechanism that does not reduce the transmission force, and the variation in the transmission force can be reduced. The wear and tear can be reduced, and the durable life can be increased.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Figure 1 is a side sectional view showing a state in which the control handle is off and remote control is off. Figure 2 is a schematic diagram of tJ1 showing a state in which the control handle is auto and remote control is off. The third beach is m
FIG. 1 is a schematic diagram showing a state where the U-handle is auto and remote control is on, and FIG. 4 is a schematic diagram of FIG. 1 showing a tripping state. In the figure, (101) is a roller and pin (10
2) is rotatably caulked to the control lever (63). Since the other parts are the same as the conventional one, the same reference numerals are given and the explanation is omitted.

Further, the operation is the same as that of the conventional one, except for the fact that the roller (1o1) rolls and the transmission force can be transmitted smoothly, so the details will be omitted. By providing the roller (101) as a mechanism that does not reduce the transmission force, the influence of the force on the load transmission between the control lever (63) and the transmission lever (34) can be reduced to a negligible level. be.

Next, another embodiment of the present invention will be described with reference to FIGS. 5 to 8. Fig. 5 is a side cross-sectional view showing a state in which the control handle is off and remote control is off, Fig. 6 is a schematic diagram of Fig. 5 showing a state in which the control handle is auto and remote control is off, and Fig. 7 is a side sectional view showing a state in which the control handle is auto and remote control is off. FIG. 5 is a schematic diagram showing an operation-on state, and FIG. 8 is a schematic diagram of FIG. 5 showing a trip state. In the figure, (103) is a connecting plate, which has a long hole (103a) on the control lever (63) side, and a pin (103).
4) and is slidably held on the control lever (63), and the other end is rotatably fixed to the transmission lever (34) with a rivet (105). Since the other parts are the same as the conventional one, the same reference numerals are given and the explanation is omitted.

The operation will be explained. In the state in which the control handle is off as shown in FIG. 5, there is a gap between the connecting plate (103) and the pin (104) as in the conventional case. Then, as shown in FIG. 6, this gap disappears when the control handle is on.

In the state where the electromagnetic section is turned on as shown in FIG. 7, the operation is the same as the conventional one. In the trip state shown in FIG. 8, the long hole (103a) of the connecting plate (103) connects the electromagnetic part (200)
3) is disconnected and disconnected as before. As a mechanism that does not reduce the transmission force, a connecting plate (10
3) Since the load (force) is transmitted through the elongated hole (103a) and the pin (104), both slide and the transmitted force can be transmitted smoothly, reducing the tension between the levers (34) and (63). It is possible to reduce the influence of force to a negligible level.

Further, other embodiments of the present invention will be described with reference to FIGS. 9 to 13. Figure 9 is a side sectional view showing the remote control off state with the control handle OFF, Figure 10 is a front view with the front cover of Figure 9 partially removed, and Figure 11 is the remote control off state with the control handle auto. Fig. 9 is a schematic diagram showing the state of , Fig. 12 is a schematic diagram of Fig. 9 showing a state where the control handle is auto and remote control is on, and Fig. 13 is a schematic diagram of Fig.
This is a schematic diagram of the figure, and the same or equivalent parts as in the embodiment shown in FIGS. 5 to 8 are given the same reference numerals, and the explanation thereof will be omitted. In the figure, (106) is an arm provided at one end of the connecting plate (103), which is extended toward the front cover (2) and connected to the display button (107). Display button (10
7) is always on the front cover (protruding from the force).

The operation will be explained. In the control handle off state shown in FIG. 9, the display button (
107) protrudes from the hole (10B) of the front cover (2) to indicate the OFF state.When the control handle (50) is turned on as shown in FIG. The button (107) is protruding and indicates the main circuit OFF state. In Fig. 12, the electromagnetic part (200) is in the ON state and operates in the same way as the conventional one, but the connecting girder (103)
moves toward the back cover (4), so the display button (107) becomes flush with the front cover (2) and displays the main circuit ON state. In addition, the electromagnetic part (2
00), if the display button (107) is pushed from the outside toward the back cover (4), the state shown in FIG. 12 can be achieved, and the main circuit can be turned on only during that time. In the state shown in FIG. 9, the display button (107) cannot be pressed. Figure 13 shows the connection board (10
3) Since the electromagnetic part (200) and the control lever (63) are disconnected from each other by the elongated hole (103a), high-speed shutoff can be performed as before, and the connecting plate (103) is similar to that shown in Fig. 11. To return to the original position, use the display button (107) to display main circuit OFF.

〔Effect of the invention〕

As described above, the present invention has the effect of providing a stable remote-controlled circuit breaker with less variation in the transmission force between the control lever and the transmission lever and with less wear and tear.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an embodiment of the present invention with the control handle off and the remote control off. Fig. 2 is a schematic diagram of Fig. 1 showing the control handle auto and the remote control off. 1 is a schematic diagram of FIG. 1 showing the control handle auto and remote control ON state, FIG. 4 is a schematic diagram of FIG. 1 showing the trip state, and FIG. 5 is a control handle OFF state showing another embodiment of the present invention. Fig. 6 is a schematic diagram of Fig. 5 showing the remote control off state with the control handle auto, and Fig. 7 is a side sectional view of the remote control off state with the control handle auto. FIG. 8 is a schematic diagram of FIG. 5 showing a tripped state; FIG. 9 is a side cross-sectional view of another embodiment of the invention in a remote control off state with the control handle off; FIG. 10 is a front view of Fig. 9 with the front cover partially removed, Fig. 11 is a schematic diagram of Fig. 9 showing the state in which the control handle is set to auto and the remote control is off, and Fig. 12 is a schematic diagram of the state in which the control handle is set to auto and the remote control is turned on. The schematic diagram of FIG. 9 showing the state of
FIG. 13 is a schematic diagram of FIG. 9 showing the trip state, and FIG.
The figure shows a side cross-sectional view of the conventional control handle in the remote control off state, Figure 15 is a front view with the front cover in Figure 14 partially removed, and Figure 16 is the back cover in Figure 14. Fig. 17 is a schematic diagram of the 14th section showing the state in which the control handle is auto and the remote control is off, and Fig. 18 is a schematic diagram of the 14th section showing the state in which the control handle is auto and the remote control is on. 19 is a schematic diagram of FIG. 14 showing a trip state, and FIG. 20 is an exploded perspective view of the electromagnetic part. In the figure, (1) is the circuit breaker case, (2) is the front cover, (3) is the base, (4) is the back cover, (0 is the power supply side terminal, (a to (17) are the contact parts, (26) is the ) is an electromagnetic coil,
(28) is a fixed core, (30) is a movable core, (34) is a transmission lever, (200) is an electromagnetic section, (50) is a control handle, (63) is a control lever, (300) is a control mechanism section, ( 400) is the overcurrent force release part, (78) is the load terminal,
(101) is a roller, (102) is a pin, (103) is a connecting plate, (103a) is a long hole, (104) is a pin, (103) is a connecting plate, (103a) is a long hole, (104) is a pin,
06) indicates an arm, and (107) indicates a display button. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (4)

[Claims] (1) It has a contact part, an electromagnetic part consisting of an electromagnetic coil, a fixed core, and a movable core, a control lever that transmits the operation of the movable core to the contact part, and an externally operable control handle, and a control mechanism section that holds the control lever in the contact section OFF state when the control handle is turned off, and leaves the control lever idle when the control handle is turned OFF so that the operation of the movable iron core is transmitted to the contact section, and an overcurrent; In the remote-controlled circuit breaker, the transmission lever of the electromagnetic part and the control lever are engaged by a mechanism that does not reduce the transmission force. A remote-controlled circuit breaker characterized by: (2) The remote-controlled circuit breaker according to claim 1, wherein the mechanism that does not reduce the transmission force is a roller rotatably provided on the control lever. (3) The mechanism that does not reduce the transmission force is a connecting plate rotatably attached to one of the transmission lever and the control lever by a pin, and movably attached to the other by a pin via a long hole. remote controlled circuit breaker. (4) The remote-controlled circuit breaker according to claim 3, wherein the communication plate is provided with an arm projecting to the outside so that the arm can be turned on from the outside, and the arm also has the function of an on/off display.