JPH089872Y2 - Remote control type circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of a remote control type circuit and disconnector.

[Conventional technology]

FIGS. 13 to 18 show a conventional remote control type circuit breaker or breaker disclosed in, for example, Japanese Utility Model Laid-Open No. 61-168542, and FIG. 13 shows a breaker or breaker with both contacts opened. Off state diagram of
Fig. 14 is a diagram in which both contacts are closed and the circuit breaker is in the ON state. Fig. 15 is a trip state in which both contacts are opened due to the tripping latch being activated. Fig. 16 is a state in which an insulation barrier is attached. 13 is the same as FIG. 13, FIG. 17 is a state diagram in which a micro switch or the like is attached to FIG. 16, and FIG. 18 is a control circuit diagram for remote operation.

In FIGS. 13 to 15, (1) is a frame composed of a base (1a) and a cover (1b), and each figure is a cover (1b).
It is the figure which removed. An operation handle (2) is rotatably attached to the frame (1) by a handle shaft (2a) and has an operation pin (3) and a reset projection (4) on the inner side. In (5), the recess (5a) at one end is the operation pin (3).
A first link slidably and rotatably engaged to
(6) is a second link whose one end is rotatably connected to the other end of the first link (5), and (7) is a second link (6)
A movable element frame, one end of which is rotatably connected to the other end of which and an intermediate portion is rotatably supported by a first pivot pin (8) of the frame (1), and (9) is a first pivot pin. A movable contact held by the movable element frame (7) while being pivotally supported by (8),
(10) is a movable contact and (11) is a fixed contact, which is connected to the load terminal (13) by an arc runner (12). (14)
Is a lever rotatably supported by the second pivot pin (15) of the frame (1). The link pin (16) at one end supports the intermediate part of the first link (5).
Reference numeral (17) is a trip latch having an intermediate portion rotatably supported by a third pivot pin (18) of the frame (1), which is releasably engaged with the other end of the lever (14). (19) is a trip drive spring for urging the lever (14) in the direction of engaging the trip latch (17) (counterclockwise in the figure), and (20) is the trip latch (17). A resetting return spring for urging the lever (14) in the direction of engagement (clockwise in the figure),
Reference numeral (21) is an overcurrent detecting device for actuating the trip latch (17), which comprises an electromagnet (21a) and a bimetal (21b).
The bimetal (21b) is pressed by the adjusting screw (22) above the trip latch (17) against the return spring (20), and the electromagnet (21a) is pushed by the plunger (23). The lower part of is pressed against the return spring (20).
(24) is the power terminal connected to the bimetal (21b), (2
5) turns on the operation handle (2) by a remote control signal,
An operation electromagnet that is turned off and is connected to the operation handle (2) by an operation link (26). (27) is a control circuit terminal of the operating electromagnet (25), (28) is an arc extinguishing chamber,
(29) is a flexible copper twisted wire that connects the bimetal (21b) and the coil of the electromagnet (21a), and (30) is a flexible copper twisted wire that connects the coil of the electromagnet (21a) and the movable contactor (9). It is a line.

In FIGS. 16 and 17, (31) is an insulating barrier, which is fixed to the base (1a) so as to partition the inside of the frame (1). (32) is a switching switch such as a micro switch for on / off switching, which is positioned by the positioning pin (33) of the insulating barrier (31) and fixed to the insulating barrier (31) by means of a screw or the like. Reference numeral (35) is an operating piece of the switching switch (32), which is pressed by the switching switch operating projection piece (36) of the operating handle (2) in the ON state. (37) is a micro switch for disconnecting the circuit during tripping, which is positioned by the positioning pin (38) of the insulating barrier (31) and fixed to the insulating barrier (31) by means of a screw or the like. (39) is an actuating piece of the micro switch (37), which is opened by releasing from an actuator (41) which is interlocked with a link pin (16) which moves in the direction of the arrow (40) at the time of tripping.

Next, the operation will be described. In addition, in FIG. 18, (4
2) is the operating coil of the operating electromagnet (25), (43), (4
4) are diodes respectively, and Fig. 18 (a) shows 14th.
Figure 18 is in the ON state, Figure 18 (B) is in the OFF state, Figure 18
Figure (c) corresponds to the trip state in Figure 15, respectively.

First, a case where a remote off operation is performed in the on state of FIGS. 14 and 18 (a) will be described. To perform the remote off operation, a positive direct current (remote control signal) is applied to the terminal (a) in the state shown in FIG. At this time, this DC current is applied to the operating coil (42), switching switch (32), diode (4
3) and through the micro switch (37) to the terminal (c), the operation coil (42) is biased in the off direction. As a result, the plunger of the operating electromagnet (25) rotates in the direction of the arrow (45), the first link (5) rotates clockwise about the link pin (16), and the second link (6) rotates. The movable element frame (7) rotates about the first pivot pin (8) in the direction of the arrow (46), and the movable contactor (9) rotates together with the movable element frame (7) to move. The contact (10) opens. At that time, the lever (14) and the tripping latch (17) are pressed against each other by the springs (19) and (20) to be engaged with each other, so that the relationship between them does not change. During this time, the operating handle (2) rotates counterclockwise, and the actuator (35) causes the switching switch (32) to move to the position shown in Fig. 18 (b).
Is switched to the position shown in FIG. 13 and the off state shown in FIG. In this off state, each member is held in the state shown in FIG. 13 by the attraction force of the operating electromagnet (25). The reason why the switching switch (32) is switched as described above is to prevent the operating coil (42) from being burned due to long-time energization.

Next, a case where the remote ON operation is performed in the OFF state of FIGS. 13 and 18B will be described. At this time, a negative DC current (remote control signal) is supplied to the terminal (a). In other words, a positive direct current is supplied to the terminal (b). As a result, the operating coil (42) is biased in the direction opposite to that in the case of FIG. 18 (a) by the direct current flowing through the diode (44) and the switching switch (32). This causes the plunger of the operating electromagnet (25) to rotate in the direction of the arrow (47),
Link (5) rotates counterclockwise about the link pin (16) as a fulcrum, and the mover frame (7) forms a fulcrum about the first pivot support pin (8) via the second link (6). Arrow (48)
The movable contact (9) rotates together with the movable element frame (7) to close the movable contact (10). During this time, the operating handle (2) is rotated clockwise, and the switching switch (32) is switched to the position shown in Fig. 18 (a) by the actuator (35), and the on position of Figs. 14 and 18 (a) is turned on. Return to the state. Here, the changeover switch (32) is changed over to prevent the operation coil (42) from being burnt out due to the energization for a long time.

Further, a case where an overcurrent flows in the ON state of FIGS. 14 and 18A will be described. Fig. 14 (The internal structure is
In Fig. 13), the current is the power supply terminal (24) → bimetal (21b) → flexible copper stranded wire (29) → electromagnet (21a) coil → flexible copper stranded wire (30) → movable contact (9). → Moving contact (1
Flows from 0) to fixed contact (11) to load terminal (13). now,
An overcurrent flows and the bimetal (21b) bends, and the adjusting screw (22) rotates the trip latch (17) against the return spring (20) in the direction of the arrow (49), or the electromagnet. (twenty one
The plunger (23) of a) is activated and the trip latch (1
When 7) is rotated in the direction of the arrow (49) against the return spring (20), the lever (14) is disengaged from the trip latch (17) and the second spring force of the drive spring (19) causes the second spring to move. Pivot pin (15)
Rotate in the direction of the arrow (50) with the fulcrum as the fulcrum. At this time, since the operation handle (2) is held by the attraction force at the ON position of the operation electromagnet (25), the operation pin (3) does not move.
Therefore, the first link (5) together with the link pin (16) in the direction of the arrow (50) with the operation pin (3) as a fulcrum in a state where the recess (5a) engages the operation pin (3) while slurried. The movable element frame (7) rotates in the direction of the arrow (46) around the first pivot pin (8) as a fulcrum via the second link (6), and the movable element frame (7) is rotated. At the same time, the movable contact (9) rotates and the movable contact (10) opens. This is called a trip state and is shown in FIG.

In the trip state shown in FIG. 15, the actuator (41) is rotated by the link pin (16) to release the actuating piece (39) of the micro switch (37), which is not shown in FIG. As shown in the figure, the operating electromagnet (25) is disconnected from the remote control circuit and enters the "trip state". Therefore, in this "trip state", the operation electromagnet (25) cannot be operated, and the reset operation is performed by the operation handle (2).
Manual off operation of. At this time, switch (3
2), Micro switch (37) returns to the state of Fig. 18 (b). When the operating handle (2) is turned off (reset) in FIG. 15, the operating pin (3) of the operating handle (2) causes the first link (5) to rotate about one end of the second link (6). Since it is rotated, the link pin (16), that is, the lever (14) is rotated in the direction of the arrow (51) against the drive spring (19) and finally locked by the trip latch (17). At this time, the trip latch (17) is also returned to the return spring (20).
Has been restored by. The return of the lever (14) only changes the direction of the first link (5), so that there is no change after the second link (6). Therefore, the state returns to the off state shown in FIG.

In such a remote control type circuit or breaker of this kind, when the energization time of the operation electromagnet (25) is set to be long, the magnetic flux of the operation coil (42) can be used for a long time to reliably operate the opening / closing mechanism. Is something that can be done.

[Problems to be solved by the invention]

The above-mentioned conventional remote control type circuit breaker and disconnector are provided with two micro switches (32) and (37),
In order to use one micro switch (37) for disconnecting the circuit at the time of trip, the switching of the remote control signal is performed substantially only by the other micro switch (32).
Moreover, since the ON / OFF and OFF → ON operation energization time is adjusted by changing the shape of the switching switch operation protruding piece (36) which engages with the operation piece (35) of the micro switch (32), ON → OFF operation If the energization time is extended, the OFF → ON operation energization time is shortened. Conversely, if the OFF → ON operation energization time is extended, the ON → OFF operation energization time is shortened. → It was not possible to lengthen both of the ON operation and energization times. Therefore, the operation time of ON → OFF, OFF → ON does not lengthen,
As a permanent magnet of the operation electromagnet (25), an expensive open magnet having a large residual magnetic flux density must be used to ensure reliable operation of the opening / closing mechanism, resulting in a high manufacturing cost.

The present invention has been made to solve such a problem, in which two switches are used for switching the remote control signals to extend both the ON-OFF and OFF-ON operation energizing times. As a result, due to the fact that one of the operation energizing time is ON → OFF and OFF → ON is short, the cost can be reduced compared to the conventional one that uses an expensive permanent magnet of the operating electromagnet with a large residual magnetic flux density. The purpose is to obtain the circuit and disconnection.

[Means for solving problems]

The remote control type circuit breaker according to the present invention has a first switching switch which is switched by an operating handle or an operating electromagnet so as to open in an on state and a trip state and close in an off state, and an off state and a trip state. And a second switching switch that is switched by a movable contactor so as to open and close in an ON state. Both switching switches are connected in series to the operating coil in parallel relationship with each other, and further from the ON state. When switching to the off state, the second switching switch is opened near the end of the displacement of the movable contact and the first switching switch is closed near the beginning of the displacement of the operating handle, and is switched from the off state to the on state. At the time of switching, the first switching switch opens near the end of the displacement of the operating handle and the second switching switch near the starting end of the displacement of the movable contact. It is obtained by Jill so.

[Action]

In this invention, by using two switches both for switching the remote control signal, one of them is an on-off operation switch for exclusive use of the off operation for extending the energization time, and the other is an off-on switch. Since each switch can be used as a switch dedicated to ON operation to increase the operation energization time, it is possible to extend the operation energization time for both ON → OFF and OFF → ON.

[Example of device]

An embodiment of the present invention will be described with reference to FIGS. Fig. 1 is an ON state diagram of both contacts closed and a breaker,
Fig. 2 is an off-state diagram of the contacts and disconnectors with both contacts open,
FIG. 4 is a trip state diagram in which the tripping latch is actuated to open both contacts, FIG. 4 is a diagram showing an open state of the first switching switch, FIG. 5 is a diagram showing FIG. 4 from the right, FIG. FIG. 6 is a diagram showing the closed state of the first switching switch, FIG. 7 is a diagram of FIG. 6 seen from the right, FIG. 8 is a diagram showing the closed state of the second switching switch, and FIG. FIG. 8 is a view as seen from the left, FIG. 10 is a view showing an opened state of the second switching switch, and FIG.
FIG. 12 is a control circuit diagram for remote operation, as viewed from the left side. The same or corresponding parts as those of the conventional device are designated by the same reference numerals, and the description thereof will be omitted. In the figure, (52) is a first switching switch such as a micro switch for on / off switching, and its operating piece (52a) is a projecting piece () of the first link (5) connected to the operating handle (2). It is driven to open and close by 5A). The first switching switch (52) is pressed by the projecting piece (5A) as shown in FIGS. 4 and 5 in the ON state of the circuit breaker and the ON state of the circuit breaker in FIG. 2 and is opened, and in the OFF state of the circuit breaker shown in FIG. 2, it is released from the projecting piece (5A) and closed as shown in FIGS. 6 and 7. The relationship between the projecting piece (5A) and the operating piece (52a) is such that when the operation handle (2) is turned on, it is first near the end of its displacement.
The switching switch (52) of is set to open. (53) is a second switching switch such as a micro switch for on / off switching, and its operating piece (53a) is connected to the movable contactor (9), and the protruding piece (7A) of the movable element frame (7).
Is driven to open and close. This second switching switch (53)
Is closed by being released from the projecting piece (7A) as shown in FIGS. 8 and 9 in the state of turning on the circuit breaker of FIG. 1 and in the state of turning off the circuit breaker of FIG. In the state of tripping and disconnection, as shown in FIGS. 10 and 11, the projecting piece (7A) is pressed to open. The relationship between the projecting piece (7A) and the operating piece (53a) is set so that the second switching switch (53) is opened near the end of its displacement when the movable contact (9) is turned off. The first switching switch (52) and the second switching switch (52)
The switching switch (53) is connected in parallel to the operating coil (42) as shown in FIG.

Next, the operation will be described. In addition, in FIG.
1 (a) corresponds to the on state of FIG. 1, (b) corresponds to the off state of FIG. 2, and (c) corresponds to the trip state of FIG. 3, respectively.

First, a case where the remote off operation is performed in the on state of FIGS. 1, 4, 8, and 12 (a) will be described. To perform the remote off operation, a positive DC current (remote control signal) is applied to the terminal (a) in the state shown in FIG. At this time, this DC current flows to the terminal (c) through the operating coil (42), the second switching switch (53), and the diode (44), and the operating coil (42) is biased in the off direction. . As a result, the plunger of the operating electromagnet (25) rotates in the direction of the arrow (45), and the first link (5) moves around the link pin (16) as a fulcrum, as shown by the arrow (54) in FIGS. 1 and 4. The movable element frame (7) rotates in the direction of the arrow (46) through the second link (6) with the first pivot pin (8) as a fulcrum, and the movable element frame (7) is rotated. ), The movable contactor (9) rotates and the movable contact (10) opens. As shown in FIG. 4, when the first link (5) rotates in the direction of the arrow (54), the operating piece (52a) of the first switching switch (52) is released from the protruding piece (5A). The first switching switch (52) is closed as shown in FIGS. 2, 6 and 12 (b). Further, as shown in FIG. 8, a movable element frame (7)
When is rotated in the direction of the arrow (46), the operating piece (53a) of the second switching switch (53) is pressed by the projecting piece (7A) so that the second switching switch (53) is shown in FIG. As shown in FIGS. 10 and 12 (b), the second switching switch (53) is opened near the end of the displacement of the movable contactor (9). ) ON → OFF operation energization time becomes longer.

Next, a case where the remote on operation is performed in the off state of FIGS. 2, 6, 10, and 12 (b) will be described. At this time, a negative DC current (remote control signal) is supplied to the terminal (a). As a result, the operating coil (42) is biased in the direction opposite to that in the case of FIG. 12 (a) by the direct current flowing through the diode (43) and the first switching switch (52). As a result, the plunger of the operating electromagnet (25) rotates in the direction of arrow (47), and the first link (5) rotates about the link pin (16) in the direction of arrow (55) in FIG. , The movable element frame (7) rotates through the second link (6) about the first pivot pin (8) in the direction of the arrow (56) in FIGS. The movable contact (9) rotates together with the child frame (7) to close the movable contact (10). As shown in FIG. 6, the first link (5) has an arrow (5
When rotating in the direction of 5), the first switching switch (52)
The operating piece (52a) of the first is pressed by the protruding piece (5A)
The switching switch (52) is opened as shown in FIG. 1, FIG. 4 and FIG. 12 (a). The opening of the first switching switch (52) is the end of displacement of the operating handle (2). Since it is performed in the vicinity, the operation energization time from OFF to ON in Fig. 12 (B) becomes longer. Further, as shown in FIG. 10, when the mover frame (7) rotates in the direction of the arrow (56), the operating piece (53a) of the second switching switch (53) is released from the protruding piece (7A). The second switching switch (53) is shown in FIGS.
Close as shown in Figure and Figure 12 (a).

In the tripping state shown in FIGS. 3 and 12 (c), the first switching switch (52) is opened by the operation handle (2) in the on position as shown in FIG. Further, the second switching switch (53) is opened by the movable contact (9) in the off state as shown in FIG. 10, so that the operating electromagnet (25) is disconnected from the remote control signal. The "trip state" is set.

In the above embodiment, the first switching switch (52) is opened and closed by the projecting piece (5A) of the first link (5) connected to the operation handle (2). ) The projecting piece (5A) may be provided on the device itself, or the operation pin (3) may be used as the projecting piece (5A), that is, the operation handle (2) and the operation link (26).
A member that rotates (in the directions of arrows (54) and (55)) in communication with the above may be provided and used as the protruding piece (5A).

In the above embodiment, the second switching switch (53) is driven by the projecting piece (7A) of the movable element frame (7) connected to the movable contactor (9). The projecting piece (7A) may be provided on the child (9) itself.

[Effect of device]

As described above, according to the present invention, the two switches are used both for switching the remote control signal, and the operation energization time of ON → OFF and OFF → ON are both lengthened, so that the operation energization time is increased. By shortening one of ON → OFF and OFF → ON, there is an effect that the cost can be reduced compared to the conventional one that uses an expensive permanent magnet of the operating electromagnet having a large residual magnetic flux density.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention in which the contacts are closed and the breaker is in the ON state, FIG. 2 is in which the contacts are open and the breaker is in the OFF state, and FIG. FIG. 4 is a trip state diagram in which the releasing latch is actuated to open both contacts, FIG. 4 is a diagram showing an open state of the first switching switch, FIG. 5 is a diagram of FIG. 4 seen from the right, and FIG. 6 is The figure which shows the closed state of the 1st changeover switch, FIG. 7 is the figure which looked at FIG. 6 from the right, FIG. 8 is the figure which shows the closed state of the 2nd changeover switch, FIG. 9 is FIG. From the left, FIG. 10 is a view showing the open state of the second switching switch, FIG. 11 is a view from the left of FIG. 10, FIG. 12 is a control circuit diagram of remote operation, and FIG. Fig. 14 shows the conventional state in which both contacts are open and the breaker is in the OFF state, Fig. 14 is the state in which both contacts are closed and the breaker is in the ON state, and Fig. 15 is the trip latch is activated. Both contacts opened Ritsupu state diagram, FIG. 16 same view as FIG. 13 in the state of attaching the insulating barrier, FIG. 17 is a 16
FIG. 18 is a state diagram in which a micro switch and the like are attached, and FIG. 18 is a control circuit diagram for remote operation. In the figure, (2) is an operation handle, (9) is a movable contact, (10) is a movable contact, (25) is an operation electromagnet, and (42).
Is an operating coil, (52) is a first switching switch, (53)
Is a second switching switch. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A circuit breaker main body having an operating handle and a movable contactor which is opened and closed by the operating handle and constitutes a movable side of a circuit breaker contact, and an operating coil which is energized by a remote control signal. A remote control type circuit breaker comprising: an operation electromagnet for opening and closing the operation handle; and a changeover switch connected to the operation coil for switching the direction of energization of the remote control signal to the operation coil. The changeover switch is composed of a first changeover switch and a second changeover switch which are in parallel relationship with each other and connected in series to the operation coil, and the first changeover switch is for turning on the breaker body. The operation by switching between the operating handle and the operating electromagnet so as to open in the state and the trip state and close in the off state. The coil can be energized in a direction of closing the operation handle, and the second changeover switch is switched by the movable contactor so as to be opened and closed in an off state and a trip state of the circuit breaker body. Closed to allow the operation coil to be energized in the direction to open the operation handle, and when the circuit breaker body is switched from the on state to the off state, the first contact is provided near the end of the displacement of the movable contact. When the second changeover switch is opened and the state is changed from the off state to the on state, the first switch is provided near the end of the displacement of the operation handle.
The remote control circuit breaker is characterized in that the changeover switch of is opened.