JP2757925B2 - Voltage trip device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a voltage trip device used for tripping a circuit breaker or an earth leakage breaker.

[Conventional technology]

Normally, a voltage trip device is configured by an electromagnet unit that trips a contact by an externally applied voltage, and a switch unit that detects a transition of the contact and shuts off a current flowing through an electromagnet coil. There is a demand for miniaturization of the device for incorporation into a circuit breaker or earth leakage breaker,
For example, in the device disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-67438, an electromagnet section and a switch section are stacked in two stages and joined to reduce the size.

[Problems to be solved by the invention]

In the above prior art, the cross-sectional shape of the coil of the electromagnet portion is circular, insulating paper is used for the electromagnet portion and the switch portion, and the wiring space of the switch portion is narrow, and the switch, the insulating plate and the electromagnet are simultaneously used. For the configuration to coalesce,
There have been problems in improving the insulation between the electromagnet section and the switch section, increasing the wiring space, and improving the workability of assembly.

An object of the present invention is to solve the above-mentioned problems and to provide a voltage trip device suitable for further miniaturization. Another object of the present invention is to develop a voltage trip device by using a switch as a leakage detection control circuit and a rectifier.

[Means for solving the problem]

The above object is to provide an electromagnet unit that trips a contact by an externally applied voltage and a mounting unit integrally formed by using an insulating material in a voltage trip device having a switch unit that detects a transition of the contact, A rectangular bobbin that is provided in the mounting base, has an insulating chamber partitioned by opposed outer walls, and an intermediate wall provided between the opposed outer walls, and surrounds a movable core and a fixed core having a square cross section. This is achieved by a voltage trip device in which an electromagnet portion formed by winding a coil and the electromagnet portion and the switch portion are adjacent to each other with the intermediate wall of the mounting base interposed therebetween, and are integrally housed and fixed in an insulating chamber of the mounting base. Is done.

[Action]

By making the cross-sectional shape of the coil and core of the electromagnet part square, the space occupied in the yoke can be effectively used to reduce the size of the electromagnet part. Since the outer wall opposite to the switch part of the electromagnet part is molded by being separated by the wall, insulation properties are improved, disconnection due to transportation is prevented, and assembling workability is also improved.

〔Example〕

First Embodiment A first embodiment in which the voltage trip device of the present invention is mounted on a circuit breaker.
An embodiment will be described with reference to FIGS.

1 is a side view showing a voltage trip device of the present invention mounted on a circuit breaker, FIG. 2 is a detailed view of FIG. 1, FIG. 3 is a top view of FIG. 1, and FIG. FIG. 3 is a sectional view taken along line II of FIG.
Fig. 3 is a sectional view taken along the line II-II in Fig. 3, and Fig. 6 is a sectional view taken along the line III-III in Fig. 5.
It is sectional drawing. In FIG. 1, an opening / closing mechanism, a trip device, and the like are built in a molded cover 1 and a case 2,
Opening and closing of the circuit breaker is performed by operating the handle 3. Reference numeral 5 denotes a voltage trip device, 4 denotes a common interlocking shaft of the opening / closing mechanism, and 6 denotes a common trip shaft. 7 is a switch lever, 8
Denotes a trip lever of the electromagnet unit.

Next, the details of the voltage trip device 5 will be described with reference to FIGS.

As shown in FIG. 4, the electromagnet unit includes a bobbin 14 having a square cross section, a square fixed core 17, and a square movable core 12,
The yoke 9 is made of a magnetic material, and is housed in a mounting base 18 which is an integrally formed body of an insulating material composed of an outer wall 18b and an intermediate wall 18a, and is configured not to be exposed to the outside. One end of the movable core 12 is engaged with the trip lever 8. The trip lever 8 is urged in a counterclockwise direction and is supported by the pin 10.
By applying a voltage to the electromagnet portion of the voltage trip device 5, the movable core 12 moves in the direction of arrow P, whereby the trip lever 8 rotates clockwise about the pin 10,
By turning the common tripping shaft 6 in the same direction, the opening / closing mechanism of the circuit breaker operates, and the common interlocking shaft 4 (FIG. 1) turns clockwise to kick up the switch lever 7,
Is rotated counterclockwise.

As shown in FIGS. 5 and 6, the switch section comprises a microswitch 13 and a lever 7 which is urged clockwise by a spring 16 around a pin 15. The mounting base 18 is an integrally formed body of an insulating material that holds the electromagnet section and the switch section. Reference numeral 19 denotes a lead wire connecting the electromagnet portion and the switch portion, and a lead portion of the lead wire 19 is arranged in an operating portion of the electromagnet, that is, in a lateral direction of the movable core 12, as shown in FIGS. By doing so, a large space for drawing out the wiring can be taken.

The projection 18c of the mounting base 18 shown in FIG. 4 (a) engages with the engaging portion 9a of the yoke 9 to lock the yoke 9, and the projection 18c shown in FIG. The electromagnet section and the microswitch section are separated by an intermediate wall 18a.

The outer wall 18b covers the electromagnet portion, and the cross-sectional shape of the bobbin 14 is
As shown in FIG. 4B showing the AA cross section of FIG.
A plate-shaped movable core 12 is surrounded by a rectangular bobbin 14. Thus, the space in the yoke 9 is effectively used.

Another embodiment relating to the support of the lever 7 will be described with reference to FIGS. A hole 18d is formed in the intermediate wall 18a,
A notch long hole 18e is provided in c, a spring 16 is inserted into a shaft portion 7b integral with the lever 7, one end 16a of which is engaged with the lever 7, and the other end 1a.
6b is locked to the outer wall 18c. The assembling procedure involves pressing the spring 16 in the direction of arrow K as shown in FIG.
Is moved upward along the notch 18e, and the lever 7c
Into the hole 18d. The lever 7 is engaged with the cutout elongated hole 18e by hanging the spring 16b on the outer wall 18c.

The switch unit can be used as a contact for preventing burnout of the voltage trip device, and can also be used as an auxiliary switch and an alarm switch. According to the present embodiment, it is possible to further reduce the size, and to improve the insulation properties and assembly workability. Further, since the coil is not exposed on the outer surface, mechanical damage can be prevented. In addition, the miniaturization of the electromagnet section allows room in the wiring space and facilitates the assembling work.

FIG. 25 and FIG. 26 are views showing an embodiment in which the voltage trip device of the present invention is mounted on a three-pole and two-pole circuit breaker. For example, in a conventional two-pole circuit breaker, Although only one function is provided because only one is provided, a plurality of functions can be provided as in the present embodiment.

<Second embodiment> Figs. 10 to 12 show a second embodiment in which the voltage trip device 55 of the present invention is applied to an earth leakage breaker. FIG. 10 is a view of the voltage trip device 55 of the present embodiment as viewed from above, FIG. 11 is a sectional view taken along the line BB of FIG. 10, and FIG. 12 is a connection circuit diagram of the earth leakage breaker. As shown in FIG. 10, reference numeral 24 denotes a leakage detection unit of the leakage breaker, which is arranged on a side surface of the voltage tripping device 55. As shown in FIG. 11, the fixed core 22 and the movable core 21 are formed in a rectangular shape, and a spring 23 is provided between the fixed core 22 and the movable core 21 to urge the movable core 21 in the direction of arrow Q. ing. Reference numeral 20 denotes a tripping lever which is engaged with the movable core 21 by a projection 20a. In the connection circuit diagram of FIG. 12, 55 is a voltage trip device, 25 is a test circuit, 24a is a control circuit, and by integrating the control circuit 24a with the voltage trip device 55 as in this embodiment, Wiring 19a, 19b, 19c is the voltage trip device 55
The wiring inside the earth leakage breaker becomes unnecessary, and the assemblability is improved.

Third Embodiment Next, an embodiment of the undervoltage trip device will be described with reference to FIGS. Fig. 13 shows the appearance of a circuit breaker incorporating a conventional undervoltage trip device. Conventionally, a rectifying section 26 having a rectifying circuit is provided outside the apparatus main body. FIG. 14 shows a circuit diagram of the rectifier 26. The rectifier 26 rectifies an alternating current in order to prevent a “buzz” of the electromagnet. The internal structure of this embodiment will be described with reference to FIGS. The rectifier 26 is mounted on the side of the voltage trip device 65. FIG. 16 shows a cross section taken along line CC of FIG. The coil 29 has a rectangular shape, and a rectangular fixed core 27 and a movable core 28 are provided inside. As described above, by mounting the rectifier 26 inside the circuit breaker, a compact circuit breaker can be configured.

<Fourth Embodiment> An application example of the voltage trip device 75 of the present invention to a leakage alarm contact will be described with reference to FIGS. The earth leakage alarm contact is a contact that is electrically displayed only when the circuit breaker is tripped due to a ground fault.After executing the earth leakage handling process, the earth leakage alarm reset button is pressed to reset the circuit breaker. is there. FIG. 17 is a top view of the present embodiment, in which 30 is a coil, 32 is a leakage display button, and 31 is a microswitch. 32a is a projection formed integrally with the ground fault display button 32,
Is arranged so as to be in contact with the leaf spring 31b. FIG. 18 is a side view of FIG. 17, and FIG. 19 is a sectional view taken along the line CC of FIG. The movable core 34 is urged in the direction of arrow R by a spring 35 provided between the fixed core 33 and the movable core 34. The protrusion 36a of the trip lever 36 is engaged with the movable core 34, and when a leakage occurs, the movable core 34 is excited when the coil 30 is excited.
Is sucked in the direction opposite to the arrow R, and the display button 32 protrudes to the position of 32 ', thereby displaying the leakage. By moving the projection 32a to the position of 32a 'in conjunction with this operation,
The leaf spring 31b is moved to the position of 31b ', and the button 31c of the microswitch 31 is pressed to perform an electrical display. By pressing the electric leakage display button 32, the operation reverse to the above is performed, and the original state is restored. As a result, the display is made electrically at the same time as the occurrence of the leakage, so that the presence or absence of the leakage and the leakage location can be confirmed at a remote location.

<Fifth Embodiment> An embodiment provided with a voltage trip device, an auxiliary switch, and an alarm switch will be described with reference to FIGS. In this embodiment, the height of the voltage trip device 85 is reduced by making the coil cross-sectional shape rectangular, and the auxiliary and alarm switches are configured in three stages. Reference numeral 52 denotes a mounting base for molding, 37 denotes a yoke, 38 denotes a fixed core, and 39 denotes a movable core. The trip lever 40 has the pin 41 as a fulcrum and is engaged with the movable core 39a. 43 is a bobbin. 44 is a micro switch for an alarm switch, 45 is an alarm lever, with a pin 47 as a fulcrum, and a spring 46
Is biased clockwise. 48 is a micro switch for auxiliary switch, auxiliary lever 49 is pin 51 as a fulcrum,
It is urged counterclockwise by a spring 50. The operations of the voltage trip device and the auxiliary switch are the same as those in the previous embodiment, and therefore will not be described.

The operation of the alarm switch is such that the common trip shaft 53 interlocking with the circuit breaker switching mechanism is rotated clockwise by the voltage trip device 85 or the voltage trip device 85 of the circuit breaker.
The lever 45 rotates clockwise about the pin 47 by contacting the lever 45 and rotates the contact of the microswitch 44 to transmit an electric signal to the outside. The common trip shaft 53 returns to the state shown in FIG. 20 in the OFF or ON state in conjunction with the opening / closing mechanism. FIGS. 22 and 23 show a cross-sectional view taken along line FF and a cross-sectional view taken along line GG of FIG. The yoke 37 has a hole
It is held and fixed by engaging the mounting base projection 52a with 37a. FIG. 24 shows a cross section EE of FIG. As shown in the figure, by making the cross-sectional shapes of the movable core 39 and the bobbin 43 square, the coil space is effectively used and the height dimension is reduced. The voltage trip device 85 is mounted on the mounting table 52 from the upper surface side. The microswitch 48 of the auxiliary switch is inserted into the mounting table 52 in the direction of arrow M, and is prevented from falling off by the mounting table projection 52b. Micro switch 44 for alarm switch is indicated by arrow N
Insert it into the mounting table 52 from the direction. However, as for the insertion direction, insertion from the same direction is also possible.

According to the present embodiment, since the coil cross-sectional shape is square, the coil space can be effectively used, and the height dimension can be reduced. As a result, conventionally, only two types of the voltage trip device and the auxiliary switch or the alarm switch can be installed, but up to three types can be installed, and it is possible to greatly improve the function.

〔The invention's effect〕

According to the embodiment of the present invention, the electromagnet portion and the switch portion can be separately assembled, a sufficient connection space for lead wires can be obtained, and the assembling workability is good. Is separated by
The number of components is reduced and insulation reliability is improved. Furthermore, by making the coil of the electromagnet section square, the space occupied in the yoke is reduced and the electromagnet section is reduced in size, and the coil is not exposed on the outer surface of the device, which is effective in preventing damage to the coil. Numerous effects can be obtained, such as expansion of use to undervoltage trip devices and earth leakage alarms.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a voltage trip device of the present invention mounted on a circuit breaker, FIG. 2 is a detailed view of FIG. 1, FIG. 3 is a top view of FIG. FIG. 3A shows II of FIG.
FIG. 4 (b) is a sectional view taken along line AA of FIG. 4, FIG. 5 is a sectional view taken along line II-II of FIG. 3, FIG. 6 is a sectional view taken along line III-III of FIG. 9 to 9 show an embodiment relating to the support of the lever according to the present invention, FIG. 10 is a top view of an embodiment of the voltage trip device of the present invention mounted on the earth leakage breaker, and FIG. 11 is FIG. FIG. 12 is a connection circuit diagram of the ground fault circuit breaker of FIG. 10, FIG. 13 is an external perspective view of a circuit breaker incorporating a conventional undervoltage trip device, and FIG. Circuit diagram of a rectifier having a rectifier circuit, FIG. 15, FIG. 16 is a top view and a longitudinal sectional view of the absence voltage trip device according to the present invention, and FIG. 17 to FIG. FIG. 20 to FIG. 24 are diagrams showing an application example of the voltage trip device, FIGS. 20 to 24 are diagrams showing an embodiment of the present invention having a voltage trip device, an auxiliary switch and an alarm switch, FIG. 25 and FIG. The figure shows a circuit breaker FIG. 6 is a view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Cover 2, Case 3 ... Handle, 4 ... Common interlocking shaft 5, 55, 65, 75, 85 ... Voltage tripping device 6, 53 ... Common tripping shaft 7 ... Switch lever 8, 20, 36, 40 ... Trip lever 9, 37… Yoke 10, 15, 41, 47, 51… Pin 11, 16, 23, 35, 42, 46, 50… Spring 13, 31… Micro switch 14, 43… Bobbin 12, 21, 28 , 34,39… Movable core 17,22,27,33,38… Fixed core 18,52… Mounting base, 18a… Intermediate wall 18b… Outer wall, 19… Lead wire 24… Leakage detector, 24a… Control circuit 25… Test circuit, 26 ... Rectifier 29, 30 ... Coil, 32 ... Leakage display button 44 ... Micro switch for alarm switch 45 ... Alarm lever, 49 ... Auxiliary lever 48 ... Micro switch for auxiliary switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho-59-86643 (JP, U) Japanese Utility Model Sho 58-182341 (JP, U) Japanese Utility Model Sho 63-127053 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) H01H 73/06 H01H 73/12 H01H 73/36 H01H 73/40 H01H 73/38 H01H 71/02 H01H 71/04

Claims (2)

(57) [Claims] 1. A voltage trip device having an electromagnet section for tripping a contact by an externally applied voltage and a switch section for detecting the transition of the contact, wherein a mounting table integrally formed using an insulating material is provided. A square that surrounds a movable core and a fixed core having a rectangular cross-section, the insulating chamber being provided in the mounting base, and having an insulating chamber partitioned by opposing outer walls, and an intermediate wall provided between the opposing outer walls. An electromagnet portion formed by winding a coil around a bobbin, and the electromagnet portion and the switch portion are adjacent to each other with the intermediate wall of the mounting base interposed therebetween, and are integrally housed and fixed in an insulating chamber of the mounting base. Voltage trip device. 2. An electromagnet coil housed in said insulating chamber,
2. The voltage trip device according to claim 1, wherein the voltage trip device is covered with a yoke above the coil, the mounting base below the coil, the outer wall, and the intermediate wall so as not to be exposed to the outside. 3.