JP2524576B2 - Remote control type circuit breaker - Google Patents

Description

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

[Background technology]

A remote control type circuit breaker has been proposed which can turn on and off the movable contactor by a handle and can also turn on and off by a remote signal. That is, in FIG. 6, 70 is an electromagnet, 71 is a fixed contact, 78 is a fixed contact, 73 is a handle 74, a current detecting means 75 such as a bimetal, a movable contact 76 and a movable contact 77.
The opening / closing / trip mechanism has

However, from the outside, this remote control type circuit breaker can be operated by the handle 74.
Although the state of contact or separation of the contacts can be identified by the display provided on the surface of 74, there is a drawback that the on / off state by the electromagnet 70 cannot be identified. Therefore, there was a suspicion that the contact portion was not turned on even though the handle 74 was in the closed state.

[Object of the Invention]

It is an object of the present invention to provide a remote control type circuit breaker capable of separately displaying the control of a movable contactor by a handle and the control of a remote fixed contactor.

[Disclosure of Invention]

According to the present invention, there is provided an opening / closing / tripping mechanism having a structure in which a movable contact is turned on / off by operating a handle and a trip operation is performed by a current detecting means, and a fixed contact facing a movable contact of the movable contact is provided in the movable contact. A fixed contact that is movable away from the ON position of the child; and an electromagnet that remotely controls the fixed contact of the fixed contact to a position that contacts the movable contact in the ON state and a position that is separated from the movable contact. In the provided remote control type circuit breaker, a display member for externally displaying a driving state of the fixed contactor by the electromagnet is provided separately from the handle.

According to the present invention, the ON / OFF state of the movable contact can be displayed by the handle of the opening / closing / trip mechanism,
Since the driving state of the fixed contact of the electromagnet can be displayed by the display member, it is possible to easily determine which of the movable contact and the fixed contact is in the off operation when the contact portion is off. The suspicion when the contact part does not turn on can be resolved.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 5. That is, this remote control type circuit breaker has an opening / closing / tripping mechanism 4 having a structure in which the movable contactor 2 is turned on / off by the operation of the handle 1 and tripped by the current detecting means 3, and the movable contactor of the movable contactor 2. 5, a fixed contact 7 having a fixed contact 6 that faces the movable contact 2 and is movable away from the ON position of the movable contact 2, and the fixed contact 6 of this fixed contact 7 contacts the movable contact 5 in the ON state. In a remote control type circuit breaker equipped with an electromagnet 9 that is remotely controlled to a position and a position separated from its movable contact 5, a handle 1 is provided with a display member 48 for externally displaying the driving state of the fixed contact 7 by the electromagnet 9. It is provided separately from.

Explaining in detail below, the entire circuit breaker is composed of a case K forming an outer shell and a cover K'closing a side opening thereof as shown in FIG. First, the electromagnet 9 is a rotating monostable electromagnet, 15 is a plunger, 16 is a coil frame penetrating the plunger 15, 17 is a coil, 18 is a coil frame 16
A first yoke 19 disposed outside the first yoke, and 19 a first yoke 18
A second yoke 20 facing one end of the first yoke 18
It is a permanent magnet that is interposed between the second yoke 19 and the second yoke 19 to form mutually different magnetic poles. As shown in FIG. 1, one end 15a of the plunger 15 is sucked by the end 18a of the first yoke 18 opposite to the second yoke 19, and the other end 15b of the plunger 15 is second.
When it is attracted to the yoke 19 of the
When electricity is applied to 17, a repulsive force is generated during the energization, and the end portion 18 is
The other end 15b of the plunger 15 moves to the first yoke 18 side with the a side as a fulcrum. When the coil 17 is de-energized, the stable state is restored.

The fixed contactor 7 has an inverted J shape and is captively held by a support 21 made of synthetic resin. The support body 21 is pivotally supported by a fixed shaft 23 supported by the case K, and a fixed contact 6 is fixed to a fixed contactor 7.
Is provided. An elongated slot 26 for engagement is provided on the side of the fixed shaft 23 of the support 21 opposite to the fixed contact 6, and the elongated slot 26 for engagement is formed.
Is a shaft 28 provided on a connecting portion 27 fixed to the plunger 15.
Is engaged with. Therefore, when the plunger 15 is in the stable state shown in FIG. 1, the fixed contact 7 is in the posture shown in the figure, but when the plunger 15 moves to the opposite side by energizing the coil 17, the support 21 moves the fixed shaft 23. The fixed contactor 7 rotates to the center and moves to the position shown in the figure. That is, at this time, the fixed contact 6 is separated from the movable contact 5 in the ON state.

The arc-extinguishing grid 10 is located at the bottom of the case K on the opening side of the movable contact 2, and the exhaust hole 29 is formed on the back side thereof.
Further, the power supply terminal 13 is exposed on the side opposite to the arc extinguishing grid 10 of the case K, and the terminal plate 30 is the arc traveling plate of the arc extinguishing grid 10.
The arc traveling plate 11 is integrally formed with the stationary contactor 11 and is disposed so as to face the one end portion 7a side of the fixed contactor 7. Further, the arc traveling plate 11 and the other end 7b side of the fixed contact 7 are connected to each other by a flexible electric wire 12 whose example is a braided wire.

In the opening / closing / trip mechanism 4, the handle 1 is pivotally supported by a fixed shaft 32 near the top of the case K, and a part of the handle 1 is exposed through the hole 31 of the case K. Further, a movable contact engaging recess 33 and a reset leg 34 are formed at the inner end of the handle 1. Reference numeral 35 is a trip link having a substantially inverted L shape, one end of which is pivotally supported by a fixed shaft 36 on the case K, one end of a reversing spring 37 is locked at an intermediate portion, and a reset projection 38 is formed in the vicinity thereof. A locking claw 39 is formed at the other end. The middle portion of the movable contactor 2 is locked to the other end of the reversing spring 37 and pulled upward in FIG. 1 by the pulling action, and the upper end portion of the movable contactor 2 has the movable contactor of the handle 1. A movable contact 5 that engages with the combination recess 33 and that faces the fixed contact 6 is provided at the lower end. Reference numeral 40 denotes a latch link, the upper end of which is pivotally supported by the fixed shaft 41 of the case 15 and the lower end of which is bent into an L shape to form the detection unit 42, and the latch unit 43 near the lower end of the latch link 40. Are formed by holes or notches. In the regulated state of the trip link 35 in which the locking claw 39 is locked to the latch portion 43, the handle 1 is first
The position shown in the figure is the ON state, and the state shown in FIG. 2 is the OFF state. That is, when the upper end of the reversing spring 37 crosses the movable contactor 2, the movable contactor 2 is reversed due to the pulling action of the reversing spring 37, and the above operation is achieved. Reference numeral 44 denotes a stopper for the movable contact 2 in the open state.

The current detector 3 is made of bimetal, and its upper end is fixed to the upper end of the vertical portion of the terminal plate 45 of the load terminal 14, and the lower end faces the inside of the detector 42 of the latch link 40. The position adjustment of the lower end of the current detector 3 and the detector 42 is performed by an adjusting screw 46 provided on the terminal plate 45. The current detector 3 and the movable contactor 2 are connected by a flexible electric wire 47. Here, the electric circuit of this circuit breaker will be explained. In one direction, the load terminal 14 → terminal plate 45 → current detecting portion 3 → electric wire 47 → movable contact 2 → movable contact 5 → fixed contact 6
→ Fixed contact 7 → Flexible wire 12 → Terminal board 30 → Power terminal 13
Becomes

In addition, a display member 48 including a display unit 49 and a light emitting diode 48a is arranged on the top of the case K side by side with the hole 31. The light emitting diode 48a of the display member 48 is connected to the coil 17 of the electromagnet 9 in series as shown in FIG. 2 or in parallel as shown in FIG. R is a resistance. FIG. 5 (a) shows an ON (ON) display portion formed on the handle 1 in a plane viewed from the outside in the state of FIG. 1 (OFF appears when tilted to the OFF side). 4 and 5 (b), when the fixed contact 7 is turned off by the electromagnet 9, the coil 17 is energized so that the light emitting diode 48a of the display member 48 is turned on and the display portion 49 is displayed.
"Disconnecting" is displayed. Reference numeral 50 is a window for the adjusting screw.

The operation will be described. FIG. 1 shows the ON state.
That is, since the fixed contact 6 and the movable contact 5 are in contact with each other, a current flows through the electric path in the path. When the handle 1 is tilted to the opposite side from this state, the handle 1 is turned off. That is, in the handle 1, the movable contact 2 has the reversing spring 37.
The movable contact 2 is reversed by the pulling action of the reversing spring 37 when traversing the upper end of the movable contact 5, and the movable contact 5 is separated from the fixed contact 6. The movable contact 2 is locked to the stopper 44. In this OFF state, the fixed contact 6 does not come into contact with the movable contact 5 even if a remote signal is applied to the coil 17 of the electromagnet 9.

In the OFF state by the electromagnet 9, when a remote signal is applied to the electromagnet 9 in the state shown in FIG. 1, the plunger 15 rotates clockwise from the state shown in FIG. 1 with the upper end portion 15a of the plunger 15 as a fulcrum. As a result, the fixed contact 7 rotates counterclockwise around the fixed shaft 23, separates from the movable contact 2 in the ON state shown in FIG. 1, and separates the fixed contact 6 from the movable contact 5.
Also at this time, the movable contact 5 does not come into contact with the fixed contact 6 even if the handle 1 is operated contrary to the case where the handle 1 is turned off. In other words, the off-priority function is realized from these operations. The movable contact 2 is supported by the stopper 51 at this time. Further, at the same time, the display member 48 during the energization of the coil 17 operates and the electromagnet 9
It can be seen that the off operation is being performed due to.

In the trip operation, an overcurrent flows in the electric path to bend the current detecting section 40, whereby the latch link 40 rotates counterclockwise and the latch section 43 separates from the locking claw 39. When the locking claw 39 of the trip link 35 is released, the trip link 35 is released from the regulation state, and the pulling action of the reversing spring 37 causes the trip link 35 to rotate clockwise about the fixed shaft 36, and at the same time, to make a movable contact. The child 2 rotates counterclockwise and the movable contact 5 separates from the fixed contact 6. In addition, resetting can be done by tilting the handle 1 to the off side.
Pushes the reset projection 38 with and locks the locking claw 39 of the trip link 35 with the latch portion 43 of the latch link 40 in the reset state to bring it into the restricted state.

In addition, in this embodiment, the electromagnet 9 is a rotary type, but may be a reciprocating type. Further, the fixed contact 7 is rotatably supported by the fixed shaft 23 via the support 21, but may be provided integrally with the plunger 15. Further, the opening / closing / trip mechanism 4 is a quick-insertion type using the reversing spring 37, but may be a late-insertion type, as long as the circuit breaker can be opened / closed by the handle 1 and the tripping operation is performed by the current detecting means 3. Good. The current detecting means 3 is not limited to the bimetal, but may be an electromagnetic type or the like. Further, the display device is not limited to the above-mentioned embodiment, and may be any device having a configuration for displaying whether or not the coil is energized.

〔The invention's effect〕

According to the present invention, the ON / OFF state of the movable contact can be displayed by the handle of the opening / closing / trip mechanism,
Since the driving state of the fixed contact of the electromagnet can be displayed by the display member, it is possible to easily determine which of the movable contact and the fixed contact is in the off operation when the contact portion is off. The effect is that the suspicion when the contact part does not turn on can be resolved.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention with an on-state cover removed, FIGS. 2 and 3 are circuit diagrams of a display device, FIG. 4 is an external perspective view, and FIG. 5 is on. FIG. 6 is a plan view of the state (FIG. (A)) and the off state by the electromagnet (FIG. (B)), and FIG. 6 is a front view of the proposed example. 1 ... Handle, 2 ... Movable contactor, 3 ... Current detecting means, 4 ... Open / close / trip mechanism, 5 ... Movable contact, 6 ...
… Fixed contact, 7… Fixed contact, 9 …… Electromagnet, 48 ……
Display member

Claims (1)

(57) [Claims] 1. An opening / closing / tripping mechanism having a structure in which a movable contact is turned on / off by operating a handle and tripped by a current detecting means, and a fixed contact facing a movable contact of the movable contact is used to move the movable contact. A fixed contact that is movable away from the on position of the contact; and an electromagnet that remotely controls the fixed contact of the fixed contact to a position where the fixed contact contacts the movable contact in the on state and a position separated from the movable contact. In the remote control type circuit breaker, the remote control type circuit breaker is provided with a display member for displaying the driving state of the fixed contactor by the electromagnet outside the handle.