JPH0447415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to a remote control type circuit breaker.

[Background technology]

Conventional remote control circuit breakers of this type have a handle and an electromagnetic device for operation so that the movable contact can be opened and closed by the handle and can also be opened and closed by the operation of the electromagnetic device for operation. are directly connected.

However, when the opening/closing mechanism trips due to the operation of the abnormality detection means, the operating electromagnet device does not operate, so the handle remains in the on position, resulting in a drawback that a trip cannot be displayed using the handle.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a remote controlled circuit disconnector whose handle can be moved to a neutral position when tripped.

[Disclosure of the invention]

The present invention provides an operating electromagnet device that self-holds a plunger that can be driven by excitation of a coil at both end positions in its operating direction and can be released with a predetermined force, and a tripping device that responds to abnormality detection means that detects abnormal current. a latch member that engages with the member, a link rotatably supported by the latch member interposing the plunger and the movable contact so that the movable contact opens and closes in response to the plunger. The links are linked together to operate, and the movable contact can be opened by the link moving around the connecting portion on the plunger side as the latch member is disengaged by the operation of the tripping member. an opening/closing mechanism part, which is connected to the link at a position different from the connecting part on the plunger side to interlock the plunger between an on position and an off position, and to operate the link when the latch member is disengaged; The device is provided with an operation handle that moves to a substantially intermediate position between the on position and the off position upon operation.

According to the configuration of the present invention, when the operating electromagnet device is operated, the movable contact is turned on and off by the operation of the plunger. Further, since the handle is engaged with the link, the movable contact can also be opened and closed by operating the handle. Further, when the abnormality detection means is activated while the movable contact is in the ON state and the tripping member is disengaged from the latch member, the link is operated by disengaging the latch member and the movable contact is opened, and the handle is opened by the operation of the link. moves to neutral position. As a result, when a trip is made, the trip can be displayed using the handle, making it easy to use.

An embodiment of the present invention is shown in FIGS. 1 to 6. In other words, this remote control type circuit breaker can be roughly divided into body 1, terminals 2a, 2
b, an opening/closing mechanism section 3, a bistable electromagnet 4 which is an operating electromagnet device, and a detection bimetal 5 which is an abnormality detection means. The container body 1 consists of a main body 6 which has an opening on the side and parts are fitted sideways, and a cover 7 which opens the opening, and is fixed together with four rivets 8. 1a is a mounting groove. The terminals 2a and 2b are a terminal plate 9, a terminal screw 10,
It consists of a power terminal 2a and a load terminal 2b, which are each constructed of a terminal nut 11 and a dowel 12, and are installed at both ends of the container body 1, respectively.

In the opening/closing mechanism section 3, the mechanical frame 13 is attached to the caulking section 1.
4 is formed into a substantially U-shape (when viewed from above), and the handle support piece 1 is formed from the upper edge on both sides.
5 extends, and this mechanical frame 13 is fixed within the vessel body 1 by a shaft to be described later. The fixed contact 16 constituting the opening/closing section is connected to the terminal plate 9 of the load terminal 2b.
It is integrally formed with the container body 1 and is supported on the inner wall surface of the vessel body 1, and a fixed contact 17 is fixed to the tip thereof. One movable contactor 18 has a contactor shaft 19 at its lower end, and the lower end thereof is passed through the mechanical frame 13 vertically, and the contactor shaft 19 is fitted into bearing notches 20 formed at both lower ends of the mechanical frame 13. Further, a movable contact 21 is provided on the upper stage and faces the fixed contact 17.
The contact spring 22 is compressed and interposed between the movable contact 18 and the end wall of the mechanical frame 13, and each has a dowel to prevent the contact spring 22 from coming off.
3 and 24 are formed. This contact spring 22 biases the movable contact 18 to open. A first shaft 25 is provided at a position between the movable contact 21 of the movable contact 18 and the spring support part 24, and one end of the contact link 26 constituting the link is supported on the first shaft 25. A second shaft 27 is provided at the other end,
A U-shaped connecting link 28 that forms a link to this
A third shaft 31 is provided in the other end hole 30 of the connecting link 28 . Also, connecting link 2
The upper piece 34 of the latch link 33, which is a latch member formed by bending a shaft rod into a U-shape, is connected to the intermediate hole 32 at the lower part next to the second shaft 27 of 8.
The lower piece 35 is passed through a vertical slit 36 (perpendicular to the direction of rotation of the movable contact 18) formed in the mechanical frame 13. Trip link 3 which is a trip member
7 has a trip part 38 on the top and a moving piece 3 on the side.
9, the trip link shaft 40 is passed through the intermediate portion thereof, and this is supported in the shaft hole 41 at the bottom of the vertical slit 36 of the mechanical frame 13. Furthermore, the coil portion of the trip link spring 42 formed by a torsion coil spring is inserted into the trip link shaft 40. , and hooked both ends to the mechanical frame 13 and the trip link 37, thereby positioning the trip part 38 at a position where it intersects the vertical slit 36 by appropriate means. When the lower piece 35 of the latch link 33 moves to the lower end of the vertical slit 36, the trip portion 38 is pushed open so that the lower piece 35 is latched. The handle 44 has a handle shaft 45 in the middle part, which is inserted into the hole 46 of the handle support piece 15 of the mechanical frame 13.
, so as to rotate in the same direction as the movable contact 18. The tip of the handle 44 has a notched recess 47, which is inserted into the end piece 2 of the connecting link 28.
8a and the operating portion 48 on the opposite side of the tip.
protrudes from the handle hole 49 of the container body 1. This mechanical frame 13 is fixed by shafts 40, 45.
This is done by positioning the protrusions at both ends of the container into holes (not shown) in the vessel body 1.

The bistable electromagnet 4 has a coil 5 on a coil rod 50.
1 is wound, a pair of U-shaped small magnetic yokes 52a and 52b are fitted on both sides of the coil frame 50, and a permanent magnet 53 is attached to the outer surface of each small yoke 52a and 52b.
A pair of U-shaped large yokes 54a, 54b so that the same polar sides (for example, N pole) of a, 53b are attracted, and the permanent magnets 53a, 53b are attracted by their magnetic force.
are fitted into the protruding pieces 55a and 55b of the coil frame 50, while the plunger 56 is slidably passed through the cavity of the coil frame 50, and the small yoke 5 of the plunger 56
Armatures 57a, 57b are provided between the large yokes 2a, 52b and the large yokes 54a, 54b, and one end of the plunger 56 projects outward. This electromagnet 4 is connected to the container 1 in this combined state.
It is fixed as a whole by being housed in the partition wall 58 of. A pair of operation terminals 59 are provided at both ends of the coil 51.
The terminal board 60 is connected, and the terminal board 60 is installed above the power terminal 2a of the container 1, and the terminal board 6
0 is provided with a terminal screw 61. In addition, the plunger 56 is placed in the movable contact 1 while being housed in the container body 1.
The plunger 56 is arranged to reciprocate substantially parallel to the rotating direction of the plunger 56, and a shaft hole 56a of the protruding end of the plunger 56 is connected to the third shaft 31. The operation of this bistable electromagnet 4 is based on the armature 5 of the plunger 56.
When the yokes 7a, 57b contact the yokes 52a, 52b, 54a, 54b in the state shown in FIGS. 2 and 5, a stable state is achieved by the permanent magnets 53a, 53b. That is, the plunger 56 has two stable states at both ends in the operating direction, which are a stable state on the protruding side (FIG. 2) and a stable state on the retreating side, and by energizing the coil 51 in one direction or the opposite direction, one of the stable states The reverse operation is performed from one to the other.

The base end of the bimetal 5 is welded (or fixed by caulking) to the terminal plate 9 of the power supply terminal 2a and held therein, and the operating end is provided with an adjustment screw 62, the tip of which faces the moving piece 39 of the trip link 37. ing. Further, a flexible electric wire 63 such as a copper stranded wire is welded between the operating end and the shaft support side end of the movable contact 18, thereby connecting the power terminal 2a and the load terminal 2b.
are connected by the bimetal 5, the flexible wire 63, the movable contact 18, the movable contact 21, and the fixed contact 17, thereby forming an internal electrical circuit.

The operation will be explained. First, in the on state, as shown in FIG. 2, the lower piece 35 of the latch link 33 is latched to the trip link 37, and the plunger 56 of the electromagnet 4 is in a stable position on the projecting side. The latching of the trip link 37 causes the connecting link 28 to be pulled by the latch link 33 to a position where the second axis 27 approaches the plane containing the first axis 25 and the third axis 31, and the distance between the axes 25, 31 is reduced. are the farthest apart, and due to their dimensional relationship, the movable contact 1
8 is pressed and the movable contact 21 contacts the fixed contact 17. In this case, by setting the contact link 26 to push the movable contact 18 by a predetermined amount further than the position where the movable contact 21 contacts the fixed contact 17, the movable contact 18 can be rotated about the movable contact 21. This compresses the contact spring 22, thereby applying contact pressure to the contacts 17 and 21. This contactor shaft 19 has a notch 20 inside the notch 20 to the extent shown in FIG.
It has moved to a floating state from the inner end of. Furthermore, the position where the handle 44 is tilted in this on state is the on state of the handle 44. This ON state is maintained by permanent magnets 53a and 53b of the electromagnet 4. The ON operation is performed by passing current through the coil 51 and moving the plunger 56 to the position shown in the figure, or by moving the handle 4 to the position shown in the figure.
This is done by operating 4.

In the off state, as shown in FIG.
This is a state in which the plunger 56 is held in a stable position on the backward side in a latched state. Plunger 56
The movable contact 18 is opened due to the retreat of the movable contact 18 . The operation is performed by energizing the electromagnet 4 from the ON state to reverse the plunger 56, or by reversing the handle 44.

In the trip state, as shown in FIG. 6, when an overcurrent of more than a predetermined value flows through the electric circuit, the bimetal 5 is heated by itself and bends to the low expansion side, and when the bimetal 5 bends by a predetermined amount, the adjustment screw 62 is moved by the trip link 37. Piece 3
9 is pressed to perform a tripping operation in which the trip portion 38 is released from the lower piece 35 of the latch link 33. As a result, the action of the contact spring 22 causes the second shaft 27 to
moves away from the plane containing the first and third axes 25 and 31, and the movable contact 18 performs an opening operation. At this time, since the plunger 56 remains fixed, the connecting link 28 rotates about the third shaft 31, and the handle 44 assumes a vertical position, thereby displaying a trip.

Note that the reset is carried out by turning the coil 51 energized to move the plunger 56 to the stable position on the backward side, and turning the handle 44 to the off side, with the bimetal 5 returned to its original position and the trip link 37 returned by the spring 42. Just defeat it.

In addition, in this invention, the detection means is not limited to the bimetal 5, but may be of an electromagnetic type or the like.

〔Effect of the invention〕

As described above, according to the remote control type circuit breaker of the present invention, when the abnormality detection means operates and the tripping member is separated from the latch member when the movable contact is in the ON state, the plunger of the operating electromagnet device is activated. The link that connects the movable contact and the movable contact operates to open the movable contact, and the operation handle that is engaged with the link moves to the neutral position due to the operation of the link. This has the effect of making trip display possible and making it easier to use.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of the on-state, Fig. 3 is a perspective view of the device with the body removed, Fig. 4 is an exploded perspective view of the same, and Fig. 5 is a perspective view of an embodiment of the present invention.
The figure is a sectional view of the off-state, and FIG. 6 is a sectional view of the tripped state. 3... Opening/closing mechanism part, 4... Bistable electromagnet which is an electromagnetic device for operation, 5... Bimetal for detection which is an abnormality detection means, 17... Fixed contact, 18...
Movable contact, 21...Movable contact, 26...Contact link forming a link, 28...Connection link forming a link, 33...Latch link that is a latch member, 37...Trip link that is a tripping member, 44...Handle, 51...Coil, 56
...Pranjiya.

Claims (1)

[Scope of Claims] 1. An operating electromagnet device that self-holds a plunger that can be driven by excitation of a coil at both end positions in its operating direction and that can be released with a predetermined force, and that responds to abnormality detection means that detects abnormal current. a latch member that engages with a tripping member, and a link rotatably supported on the latch member to connect the plunger and the movable contact to the movable contact in response to the plunger. The movable contacts are linked together so that the contacts open and close, and when the latch member is disengaged by the operation of the tripping member, the link moves around the connecting portion on the plunger side, thereby opening the movable contact. an opening/closing mechanism part that can be connected to the link at a position different from the connecting part on the plunger side to interlock the plunger between the on position and the off position, and to operate the plunger when the latch member is disengaged. A remote control type circuit breaker comprising an operating handle that moves to a substantially intermediate position between the on position and the off position by operation of the link.