JPH0642349B2 - Remote control type circuit breaker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a remote control type circuit breaker.

[Background technology]

In the conventional remote control type circuit breaker, the drive unit of the electromagnet is connected to the handle of the means for turning the circuit on and off. Therefore, the circuit can be turned on and off by the handle, and the circuit can be turned on and off even when the electromagnet is driven by the remote signal.

However, when it is necessary to prevent the load circuit from being turned on for control or other reasons, that is, to prioritize off, the remote control type circuit breaker described above operates the handle by operating the handle even if the electromagnet is turned off. In addition to being able to turn on the switch, the circuit can be turned on by the electromagnet even if the handle is turned off.

[Object of the Invention]

An object of the present invention is to provide a remote control type circuit breaker having an off priority function.

[Disclosure of Invention]

According to the present invention, the movable contact can be moved between the on position and the off position by operating the handle, and the movable contact is trip-opened in association with the operation of the abnormal current detection unit. The slow-entry opening / closing / trip means in which the movable contact makes the closing operation in proportion to the closing speed of the movable contact, the fixed contact facing the movable contact, and the fixed contact connected to the fixed contact to move the fixed contact. It is provided with an electromagnet for controlling the ON position of the contactor and the position separated from the movable contactor.

According to the present invention, the fixed contact is controlled by the electromagnet so that the movable contact is in the on position and the position separated from the movable contact. Therefore, when the movable contact is turned off by the handle, the contact is maintained even if the electromagnet is driven. Does not turn on, and when the fixed contact is turned off by the electromagnet, the contact does not turn on even if the handle is operated. That is, the off-priority function is provided. Further, since the opening / closing / tripping means is of the late-insertion type, the closing speed of the movable contact is slower than that of the rapid-insertion type in which the reversing spring is operated because the closing speed depends on the speed of the handle operation manually operated. Therefore, the impact on the fixed contactor and the contact bounce are small, and the impact on the electromagnet is small, so that long life and high reliability can be secured.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 7. That is, this remote control type circuit breaker can move the movable contactor 2 between the on position and the off position by operating the handlebar 1 and trips the movable contactor 2 in association with the operation of the abnormal current detector 3. And the fixed contactor 5 facing the movable contactor 2 and the delay contact type opening / closing means 4 which causes the movable contactor 2 to perform the closing operation in proportion to the speed at which the handle 1 is closed. And the fixed contactor 5 is connected to the fixed contactor 5 and the fixed contactor 5 is moved to the ON position of the movable contactor 2 and the movable contactor 2.
And an electromagnet 6 that is controlled to a position spaced apart from.

Explaining in detail below, the case 7 is a side surface (front side in the figure)
Is opened, and the opening is closed by a cover (not shown).
A load terminal 8 and a power supply terminal 9 formed of a plug-in metal fitting are arranged at both ends of the case 7. The slow-entry opening / closing / trip means 4 is an opening / closing means composed of a handle 1, a movable contact 2, a fixed contact 5, and a return spring 10, an abnormal current detector 3 using a bimetal as an example 3, a latch link 11, The trip means comprises a trip link 12, an operating link 26 and a slider 33.

The handle 1 has an intermediate portion pivotally supported by a fixed shaft 13 and a handle return spring 14 having a torsion coil spring as an embodiment.
The shaft portion is supported by the fixed shaft 13 and biases the handle 5 to the off side. This handle 1 has an exposed hole 59 in the case 7.
The knob portion 60 is further exposed, and the connecting portion 61 and the reset protrusion 58 are provided on the opposite side of the knob portion 60 with the fixed shaft 13 as the center. In addition, the movable contactor 2 is the second
As shown in the figure, L is placed inside the contactor holder 15 that has an inverted U shape.
The movable contactor 16 having a character shape is loosely fitted to the movable contactor plate 16
The upper end of the contact holder 15 penetrates the notch 17 of the contact holder 15, and the guide pieces 19 on both sides of the movable contact plate 16 are slidably supported by the slits 18 of the side plates of the contact holder 15. A contact pressure spring 20 is compressed between the plates 16. The movable contact 21 is provided on the lower surface of the movable contact plate 16. A cut-and-raised piece 22 that cuts and raises the side plate of the contact holder 15 is slidably supported in a guide groove (not shown) formed in the case 7 and the cover, and returns to the vertical piece of the fixed contact plate 16. The spring receiver 23 is attached. In the movable contactor 2 thus constructed, both sides of the contactor holder 15 are guided by the guide ridges 24 of the case 7 and the cover, and the spring bearing 25 facing the return spring bearing 23 is formed in the case 7. The return spring 10 is interposed between the spring receiver 25 and the return spring receiver 23. The operating link 26 has a U-shape, and both ends thereof have shaft portions 26a, 26.
b, the shaft portion 26a is connected to the handle 1, and the shaft portion 26a
b is slidably supported by the guide slit 27 of the case 7 and connected to one end of the latch link 11. Further, the winding portion of the reset spring 60 is held on the shaft portion 26b. The trip link 12 has an intermediate portion supported by the fixed shaft 28 on the case 7, and the other end portion of the latch link 11 is engaged with the latch engagement portion 29 at one end of the trip link 12,
The shaft portion of the trip link return spring 30 having a torsion coil spring as an embodiment is fitted to the fixed shaft 28, one end is locked to the trip link 12, and the other end is locked to the stopper 31 of the case 7 to make the trip link. 12 is urged in the direction of locking the latch link 11. One end of a slider 33 slidably supported by the guide slit 32 of the case 7 comes into contact with the intermediate portion of the latch link 11, and the contact holder 15 of the movable contact 2 is attached to the other end of the slider 33. Abut. Further, the base end portion of the abnormal current detection portion 3 having a bimetal as an embodiment in parallel with the trip link 12 is connected to the terminal plate 34 of the load terminal 8, and the tip end of the adjustment screw 35 is provided with the adjustment screw 35 provided at the tip end thereof. The trip link 12 faces the opposite side of the latch engagement portion 29. In addition, 36 is an extinguishing grid, and its arc traveling plate 37 is the terminal plate 3 of the load terminal 8.
It is connected to 4. Reference numeral 38 is an exhaust hole thereof, and 39 is a flexible electric wire connected to the abnormal current detector 3 and the movable contactor plate 16 of the movable contactor 2.

The electromagnet 6 is a bistable type as shown in FIG.
Coil frame 40, armature 41 slidably passing through coil frame 40, armatures 42 and 43 provided at both ends of armature 41, a pair of yokes 44 and 45 having a U shape and different sizes, and this yoke 44. , 45, which are disposed between the yokes 44 and 45 to magnetize the yokes 44 and 45 to have different magnetic poles, and a coil 48 wound around the peripheral body of the coil frame 40. The yokes 44 and 45 are coil frames 40
Are mounted so as to sandwich the coil frame 40 from both sides of the armature, and the armatures 42 and 43 are located between both end pieces of the yokes 44 and 45, respectively, and the armature 41 is operated by excitation by the coil 48. In the state shown in Fig. 5, the yoke 4
The permanent magnets 46, 47 are brought into contact with the magnets 4, 45 and are held bistable by the attraction force of the permanent magnets 46, 47. Further, by energizing the coil 48, the armature 41 can be moved from one stable state in the state shown in FIG. 1 or 5 to another stable state on the opposite side depending on the energizing direction.

At one end of this armature 41, as shown in FIG.
9 are integrally connected, and the fixed contact 5
The connecting end side of is engaged. Here, the fixed contactor 5 is formed of a rectangular flat plate, has a bearing 51 at a predetermined position of an intermediate portion determined by the lever ratio, and is rotatably supported by a fixed shaft 52. Opposed fixed contact 53
Is provided.

The electric circuit of this circuit breaker includes a load terminal 8, a terminal plate 34,
Abnormal current detection unit 3, flexible electric wire 39 welded to the upper end of abnormal current detection unit 3, movable contact 2, movable contact 21, fixed contact 53, fixed contact 5, fixed in which the flexible electric wire 39 is welded It is composed of a flexible electric wire 54 welded to the opposite side of the fixed contact 53 of the contact 5 and a power supply terminal 9 connected to the flexible electric wire 54.

In addition, 55 is a light emitting diode for displaying the exciting operation of the electromagnet 6, 56 is its window, and 57 is a window for adjusting the adjusting screw 35.

The operation of this remote control type circuit breaker will be described. That is, FIG. 1 is in the ON state, and the fixed contactor 5 is in the lower stable position in FIG. 1 due to the armature 2 of the electromagnet 6, so that the fixed contactor 5 is in the ON position of the movable contactor 2 and is movable. Contact 2 is trip link 1
Handle 1 with latch link 11 latched to 2
Is rotated counterclockwise from the state shown in FIG. 4 to the state shown in FIG. 1 to push down the operation link 26, and the latch link 11 is rotated counterclockwise about the latch engagement portion 29 as a fulcrum. The mover 33 is pushed down, whereby the movable contactor 2 is guided by the guide ridges 24 and the like to move down to return the spring 1.
When 0 is compressed, the movable contact 21 comes into contact with the fixed contact 53, the contact pressure spring 20 is further compressed, and contact pressure is applied. In this case, the closing speed of the movable contact 21 with respect to the fixed contact 53 depends on the operation of the handle 1 and the operation link 2
6, the speed is proportional to the speed of the handle 1 because it is closed via the latch link 11 and the slider 33. Therefore, the closing of contacts is a delayed operation. The handle 1 in the on-state has the return spring 10 when the shaft portion 26a of the operation link 26 crosses the line connecting the fixed shaft 13 and the shaft portion 26b of the operation link 26 to the trip link 12 side in FIG.
It is held by the spring force of.

FIG. 4 shows the steering wheel 1 in the off state. When the handle 1 is rotated clockwise from the state shown in FIG. 1, the shaft portion 26a of the operation link 26 on the handle 1 side connects the fixed shaft 13 and the shaft portion 26b of the operation link 26 on the latch link 11 side with the above-mentioned line. When the handle 1 is reversed by crossing the opposite side, the spring force of the return spring 10 pushes up the movable contactor 2 and pushes up the slider 33, and the shaft portion 26b moves to the upper end side of the guide slit 27. . As a result, the movable contact 21 separates from the fixed contact 53 and is turned off.

FIG. 5 shows an off state by the electromagnet 6. From the state shown in FIG. 1, when an external signal is applied to the coil 48 of the electromagnet 6 to move the armature 41 upward and held by the permanent magnets 46 and 47, the fixed contact 5 is linked with the operation of the armature 41. It rotates about 52, the fixed contact 53 separates from the movable contact 21, and the circuit is turned off. The distance can be set by the lever ratio of the fixed shaft 52 of the fixed contactor 5,
In particular, the size of the electromagnet 6 can be reduced by reducing the movement amount of the armature 41 and increasing the distance between the fixed contacts 53.

FIG. 6 shows a trip state. When an overcurrent flows through the circuit, the abnormal current detector 10 operates and trip link 12
Rotates against the return spring 30, and its latch engagement portion 29
Is disengaged from the latch link 11, and the regulation of the latch link 11 is released. Therefore, the pressure of the return spring 10 applied to the latch link 15 via the slider 33 causes the latch link 11 to rotate around the shaft portion 26b as a fulcrum, and the movable contact 2
Rises and the movable contact 21 is separated from the fixed contact 53, and the trip is turned off. In FIG. 6, the handle 1 is in the on position, but is turned to the off side by the return spring 14, and the latch link 11 is supported by the force relationship with the reset spring 60, and the handle 1 is positioned in the neutral position. Further, when a short-circuit current flows, the electromagnetic contact of the movable contact 2 and the fixed contact 5 causes the fixed contact 5 to move away from the attraction force of the permanent magnets 46 and 47 of the electromagnet 6 to cause instantaneous opening. The abnormal current detection unit 3 operates to catch up with the operation, and the trip link 12
Operates tripping.

In the reset after the trip, the abnormal current detection unit 3 is cooled by the opening of the circuit and spontaneously returns, the trip link 77 is restored by the return spring 76, and the handle 5 in the neutral state is turned off as shown in FIG. When the latch link 11 is returned by the reset spring 60 by tilting it to the side, the latch side of the launch link 11 is latched by the latch engaging portion 29 of the trip link 12, and the off state shown in FIG. 4 is obtained.

With this configuration, it is possible to realize an off-priority function in which the contact cannot be turned on by the electromagnet 6 or the handle 1 even if the contact is turned off by the other, and it is possible to meet the demand for the off-priority function. it can. Further, since the opening / closing / tripping means 4 is of the late type, the contact closing operation at the time of turning on is delayed, the electromagnet 6 supporting the fixed contact 5 and the fixed contact 5 is not impacted, and the contact bounce can be reduced. Therefore, reliability can be improved and long life can be achieved.

In the present invention, the late-insertion type opening / closing / tripping means can open / close the contacts by operating the handle 1, the trip operation can be performed by the operation of the abnormal current detector, and the contact closing speed can be the operation of the handle 1. The mechanism is not limited to the mechanism of the above embodiment as long as it is proportional to the speed. The electromagnet is not limited to the polar type, and may be a rotating type instead of a reciprocating type. In addition, in the opening / closing / tripping means 4 of the second embodiment, the slider 33 is interposed between the latch link 11 and the movable contact 2, but the slider 33 may be linked to both of them, and in this case, it returns. The spring 10 may be provided on the latch link 11 or the actuation link 26. Further, the contact pressure spring 20 may also serve as the return spring 10 and the spring receiver 25 may serve as a stopper. Further, although the abnormal current detector 3 is made of bimetal in the embodiment, it may be electromagnetic type or the like.

〔The invention's effect〕

According to the present invention, the fixed contact is controlled by the electromagnet so that the movable contact is in the on position and the position separated from the movable contact. Therefore, when the movable contact is turned off by the handle, the contact is maintained even if the electromagnet is driven. Does not turn on, and when the fixed contact is turned off by the electromagnet, the contact does not turn on even if the handle is operated. That is, the off-priority function is provided. Further, since the opening / closing / tripping means is of the late-insertion type, the closing speed of the movable contact is slower than that of the rapid-insertion type in which the reversing spring is operated because the closing speed depends on the speed of the handle operation manually operated. Therefore, the impact on the fixed contact and the contact pounce are small, and the impact on the electromagnet is small, so that the long life and high reliability can be secured.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention with an on-state cover removed, FIG. 2 is an exploded perspective view of the movable contactor, FIG. 3 is a perspective view of an electromagnet, and FIG. 4 is a manual view. FIG. 5 is a front view of the off state of the cover removed, FIG. 5 is a front view of the remote off state of the cover removed, and FIG. 6 is a front view of the trip state. 1 ... Handle, 2 ... movable contact, 3 ... abnormal current detection part, 4 ... delayed opening / closing / trip means, 5 ... fixed contact, 6 ... electromagnet

Claims (1)

[Claims] 1. A movable contactor can be moved between an on position and an off position by operating a handle, and the movable contactor is trip-opened in association with the operation of an abnormal current detector. The slow-entry opening / closing / trip means for moving the movable contact in proportion to the closing speed of the handle, the fixed contact facing the movable contact, and the fixed contact connected to the fixed contact. A remote control type circuit breaker having an electromagnet for controlling an ON position of a movable contact and a position separated from the movable contact.