JP4048506B1 - Spring-driven auto reset breaker - Google Patents

Abstract

A conventional auto-reset breaker that automatically recovers from a tripped leakage breaker has a problem that it is difficult to use in a small-scale electric facility because the outer shape of the device is large and the price is high. This is because a drive motor, a power supply device, a complicated control circuit, and the like are used.
A spring is used in place of a drive motor, a simple gear is used as a method for transmitting the drive force, and a role using a stopper using electromagnetic force and spring force instead of a complicated control circuit. realizable.
[Selection] Figure 1

Description

The present invention relates to an auto-reset breaker used for an unmanned radio communication relay station, a telemeter observation station, or the like.

In conventional unmanned wireless communication relay stations and telemeter observation stations, when the earth leakage breaker at the commercial power inlet trips due to abnormal current such as lightning strike, a high mountain relay station or remote station is required to re-enter the earth leakage breaker each time. I had to go to the distance telemeter station to re-enter the breaker. Therefore, an auto-reset breaker has been developed that automatically recharges the leakage breaker.

Conventional auto-reset breakers are equipped with a power supply device, use an electric motor as a driving force, and some control devices include a sequence circuit using a logic IC (see, for example, Patent Document 1).
Some control circuits include a microcomputer (see Non-Patent Document 1, for example).

JP 2000-31432 A Nippon Antenna Co., Ltd. Product Catalog 2004

Since the conventional auto-reset breaker described above is composed of a power supply device, an electric motor, a control device, etc., its outer shape is larger and its price is higher, so a small scale like an outdoor loudspeaker station of a municipal disaster prevention radio. The installation space for electrical equipment could not be secured, and it was rarely used due to its high price.

The present invention is intended to solve the problems of such a conventional configuration, and an object thereof is to realize a small and inexpensive auto-reset breaker.

In the present invention, in order to achieve the above object, a spring is arranged instead of an electric motor for driving, a gear having a simple structure is arranged for transmission of driving force, and electromagnetic control is performed instead of a complicated control circuit. The stopper that will be placed.

Since the components such as the springs, gears, and electromagnetic stoppers arranged in the above are small and simple in structure, the size can be drastically reduced and the price can be reduced.

As described above, since the auto-reset breaker of the present invention is small and inexpensive, it is possible to provide an auto-reset breaker that can be used for small-scale electrical equipment.

Hereinafter, the embodiment of the present invention will be described with respect to two types of earth leakage breaker re-introduction methods according to two types of trips of the earth leakage breaker.
First, a system in which the handle of the earth leakage breaker does not become a neutral position when the earth leakage breaker trips and does not need to be reset in advance for re-introduction will be described with reference to FIGS.
Next, referring to FIGS. 16 to 35, a system in which the earth leakage breaker handle is in a neutral position when the earth leakage breaker trips and the earth leakage breaker handle is re-introduced after resetting in advance to reinject the earth leakage breaker will be described with reference to FIGS. .
A common additional device in the above-described two types of earth leakage breaker re-introduction system will be described with reference to FIGS.

In the figure, 1 is an overall configuration diagram of the apparatus.
The gear 2 engaged with the spring 1 is rotated by releasing the pre-stored spring 1, the gear 1 meshing with the gear 2 is rotated, and the rotation shaft fixed to the gear 1 is rotated and rotated. A pedal fixed on the shaft extension rotates, and the pedal is disposed so as to push up the handle of the earth leakage breaker, and the electromagnetic stopper 1, the electromagnetic stopper 2, the pin 1, the pin 2, and the spring 2 are used as a pedal locking means. , Spring 3, spring 4 and spring 5 cooperate.

In the figure, 2 is a system diagram.
With the electromagnetic stopper 1 controlled by the presence or absence of the secondary side output of the earth leakage breaker and the electromagnetic stopper 2 controlled by the presence or absence of the primary side output of the earth leakage breaker, the rotation start and stop of the pedal rotation drive unit is controlled. Re-insert the tripped leakage breaker.

In the figure, 3 is a basic operation diagram of pedal rotation.
The electromagnetic stopper 1 is pivoted to the A side and the B side with C as a fulcrum, and is arranged at a position where the rotation of the pedal can be braked. When electric power is supplied to the electromagnetic stopper 1, it is moved to the A side by electric force. The pin 1 that rotates and engages the A side is shifted to a position where the rotation of the pedal can be braked, and at the same time, the spring 2 is extended and stored. On the B side, the pin 2 is moved out of the pedal braking range from a position where the rotation of the pedal can be stopped by releasing the spring 5. When electric power is not supplied to the electromagnetic stopper 1, the electric force does not work, and the spring 2 releases the pin 2 that rotates toward the B side and engages the B side within the pedal braking range. At the same time, the spring 5 is stored. On the A side, the pin 1 is moved out of the pedal braking range by the release of the spring 4.
The electromagnetic stopper 2 rotates so as to move the pin 1 up and down with E as a fulcrum. When electric power is supplied to the electromagnetic stopper 2, the electromagnetic stopper 2 rotates clockwise by the electric force and does not affect the pin 1, and at the same time the spring 3. To postpone and accumulate energy. When electric power is not supplied, the electric force does not work and the spring 3 is rotated counterclockwise by the release of the spring 3, and the pin 1 is moved into the pedal braking range, and the rotation of the pedal can be braked. At the same time, the spring 4 is stored. To force.

In the figure, 4 is a normal operation state.
Electric power is supplied to the input side of the earth leakage breaker, the pedal is prevented from rotating by the pin 1, the earth leakage breaker is in the on state, and electric power is output to the output side.

In the figure, 5 to 7 are operation explanatory diagrams when the earth leakage breaker malfunctions due to abnormal current such as lightning strike and trips,
When the earth leakage breaker trips in FIG. 5 and the electric power is not supplied to the electromagnetic stopper 1, the electric force is lost and the spring 2 is released to rotate to the B side. The A side pin 1 is released from the braked pedal. Starts rotating, and at the same time, the pin 2 engaged with the B side is shifted to a position where the rotation of the pedal can be braked. In FIG. 6, the handle of the earth leakage breaker is lifted and the earth leakage breaker is turned on again. In FIG. 7, electric power is again supplied to the electromagnetic stopper 1, and the stopper 1 is rotated to the A side by electric force, and the pin 1 is turned on the pedal. The rotation is shifted to a position where the rotation can be braked, and the opposite pedal is stopped at the pin 1 to return to the normal operation state of FIG.

In the figure, 8 to 11 are operation explanatory diagrams when the earth leakage breaker trips due to a lightning strike or the like, and at the same time, an abnormality occurs in the power distribution facility of the power company and a power failure occurs.
If the earth leakage breaker trips in FIG. 8 and power is no longer supplied to the electromagnetic stopper 1, the electromagnetic stopper 1 loses its electric power and rotates to the B side due to the release of the spring 2. However, the input power to the earth leakage breaker is also due to a power failure. Since the electromagnetic stopper 2 also loses electric power and rotates to the D side by the release of the spring 3, the pin 1 remains braked against the pedal rotation. After that, when the power distribution facility of the electric power company becomes normal in FIG. 9 and power is restored and power is supplied to the earth leakage breaker, the electromagnetic stopper 2 rotates in the direction opposite to the D side by the electric force, the pin 1 comes off the pedal and the pedal Start spinning. In FIG. 10, the handle of the earth leakage breaker is lifted and the earth leakage breaker is turned on again. In FIG. 11, electric power is again supplied to the electromagnetic stopper 1, and the stopper 1 is rotated to the A side by electric force, and the pin 1 is turned on the pedal. The rotation is shifted to a position where braking can be performed, and the opposite pedal is braked by the pin 1 to return to the normal operation state of FIG.

In the figure, 12 to 15 are operation explanatory diagrams when tripping due to an abnormality on the load equipment side of the leakage breaker,
In FIG. 12, when a trip occurs due to an abnormality on the load equipment side, electric power is not supplied to the electromagnetic stopper 1, and when the electric power is lost, the spring 2 rotates to the B side, and the A side pin 1 is braked. The pedal released from the rotation starts rotating, and at the same time, the pin 2 engaged with the B side is shifted to a position where the rotation of the pedal can be braked. In FIG. 13, the handle of the earth leakage breaker is lifted and the earth leakage breaker is turned on again. In FIG. 14, it trips again due to a load abnormality, so that no electric power is supplied to the electromagnetic stopper, and the pin 2 remains in a position where the rotation of the pedal can be braked. In FIG. 15, since the pedal stops rotating at the position of the pin 2, the leakage breaker is permanently cut off. As described above, according to the present embodiment, the function as an auto-reset breaker can be sufficiently achieved, and the size can be reduced compared with the conventional one and can be provided at a low cost.

In the figure, reference numeral 16 denotes a slider for raising and lowering the handle of the earth leakage breaker as means for re-introducing the earth leakage breaker that has tripped, and a piston rod that has one end around the gear 1 and the other end connected to the lower end of the slider. FIG.
One end of a slider provided around the gear 1 is arranged so as to be movable and fixed in the direction of the rotation axis of the gear 1.

In the figure, 17 is a basic operation diagram of the vertical movement of the slider of FIG.
The method for controlling the rotation and braking of the gear 1 connected to the slider via the piston rod is the same as the cooperative procedure of the pedal, the electromagnetic stopper 1, the electromagnetic stopper 2, the pin 1 and the pin 2 in FIG. Controlled by procedure.

In the figure, 18 is a normal operation state, power is supplied to the input side of the leakage breaker, the pedal is prevented from rotating at pin 1, the leakage breaker is on, and power is output to the output side. ing.

In the figure, 19 to 23 are operation explanatory diagrams when the earth leakage breaker trips due to a lightning strike, etc. In FIG. 19, the earth leakage breaker trips and power is not supplied to the electromagnetic stopper 1, and the pedal is disconnected from the pin 1. The gear starts rotating, the handle of the earth leakage breaker tripped in FIG. 20 is pushed down by the slider to reset, the handle is pushed up in FIG. 21 and the earth leakage breaker is turned on again, and the electromagnetic stopper 1 is again powered in FIG. Is set, pin 1 is set, the slider descends in FIG. 23, the pedal stops at pin 1, the gear and slider also stop, and the leakage breaker returns to the normal operation state of FIG.

In the figure, 24 to 29 are operation explanatory diagrams when an earth leakage breaker trips due to a lightning strike or the like, and at the same time, an abnormality occurs in a power distribution facility of a power company and a power failure occurs.
In FIG. 24, the earth leakage breaker trips and power is not supplied to the electromagnetic stopper 1. The electromagnetic stopper 1 loses the electric power and rotates to the B side by the release of the spring 2. The pin 1 rotates the pedal by the release of the spring 4. Attempts are made to move outside the braking range, but on the other hand, power is not supplied to the primary side of the earth leakage breaker due to a power failure, so the electromagnetic stopper 2 also loses electric power and rotates to the D side due to the spring 3 being released. 1 stops at the brakeable position of the pedal, and the pedal rotation remains braked. In FIG. 25, when the power distribution facility of the power company becomes normal after that and the power is supplied to the earth leakage breaker, the electromagnetic stopper 2 is rotated in the direction opposite to the D side by the electric force, the pin 1 is released from the pedal, and the pedal rotates. Start. 26, the handle of the earth leakage breaker that has tripped is pushed down by the slider to reset, the handle is pushed up in FIG. 27, and the earth leakage breaker is turned on again. In FIG. 28, electric power is again supplied to the electromagnetic stopper 1, and the stopper 1 is By rotating to the A side by the electric force, the pin 1 is shifted to a position where the rotation of the pedal can be braked. In FIG. 29, the slider is lowered, the pedal is braked by the pin 1, and the normal operation state of FIG.

In the figure, reference numerals 30 to 35 are diagrams for explaining the operation when a fault occurs on the load equipment side of the earth leakage breaker. In FIG. 30, the trip is caused by an abnormality on the load equipment side, and electric power is not supplied to the electromagnetic stopper 1 so that the electric power is lost. When there is no longer any force, the spring 2 is released to the B side and the A side pin 1 is disengaged from the braked pedal, and at the same time, the pin 2 engaged on the B side is shifted to a position where the rotation of the pedal can be braked. The pedal starts to rotate and the slider starts to descend. In FIG. 31, the handle of the earth leakage breaker is pushed down to reset. In FIG. 32, the slider rises, and in FIG. 33, the handle is pushed up and the earth leakage breaker is turned on again. In FIG. 34, the leakage breaker trips again due to a load abnormality, so that no electric power is supplied to the electromagnetic stopper 1 and the pin 2 remains in a position where braking of the pedal can be braked. In FIG. 35, since the pedal stops rotating at the position of the pin 2, the earth leakage breaker is permanently cut off. As described above, according to the present embodiment, when the earth leakage breaker trips, the earth leakage breaker handle is in the neutral position, and in order to reinject the earth leakage breaker, it is reset in advance and the earth leakage breaker handle is reintroduced. It can sufficiently function as an auto-reset breaker, and can be made smaller and less expensive than the conventional one.

  In the figure, 36 is an electric motor as a biasing means for the spring 1 and a detector 1 as its control means (B contact output circuit = SW1 which is a microswitch having a third output circuit which is a normally closed output circuit). And a detector 2 (A switch output circuit = a first output circuit that is a normally open output circuit and a B contact output circuit = a second output circuit that is a normally closed output circuit) It is a whole block diagram at the time of installing SW2). The rotation shaft of the electric motor is engaged with the spring 1 through the gear 3 via the reverse rotation prevention device 1 and simultaneously engaged with the gear 2 via the reverse rotation prevention device 2 engaged with the rotation shaft of the spring 1. The gear 2 meshes with the gear 1, and the gear 1 is fixed on the same shaft as the rotating plate 1. When the rotation of the electric motor rotates in the direction in which the spring 1 is urged via the gear 3, the reverse rotation prevention device 1 works to engage the rotating shaft of the electric motor and the rotating shaft of the gear 3. When the rotating shaft rotates in the direction in which the spring 1 is released, the rotating shaft of the gear 3 and the rotating shaft of the electric motor do not engage with each other so that the rotating shaft can freely rotate. When rotating in the direction in which the spring 1 is released, the rotating shaft of the gear 2 and the rotating shaft of the spring 1 are engaged, and when the rotating shaft of the spring 1 is rotated in the direction in which the spring 1 is urged, the gear is engaged. The two rotation shafts and the rotation shaft of the spring 1 do not engage with each other and work to rotate freely. The detector 1 (microswitch SW1) circumscribed by the rotating plate 1 and the marker 1 to be detected (a recess provided on the circumference of the rotating plate 1) are pushed by the pin 1 by the electromagnetic stopper 1 and the pedal is braked. When the positions of the detector 1 and the marker 1 to be detected coincide with each other, the detector 1 pressed by the rotating plate is turned OFF, and the B contact output circuit of the detector 1 = The third output circuit, which is a normally closed output circuit, becomes “contact”. The gear 4 meshes with the gear 3, and the rotating plate 2 is fixed on the same axis as the gear 4. When the detector 2 (micro switch SW2) provided outside the rotating plate 2 coincides with the marker 2 to be detected provided around the rotating plate 2 (a concave portion provided on the circumference of the rotating plate 2), the detector 2 A contact output circuit = normally open circuit output circuit, the first output circuit is "disconnected", B contact output circuit = normally closed circuit output circuit, the second output circuit is "contact".

In the figure, 37 is a system diagram in FIG.
The electric motor is supplied with the output power of the earth leakage breaker through two output circuits of the third output circuit of the detector 1 (micro switch SW1) and the first output circuit of the detector 2 (micro switch SW2). . When the earth leakage breaker is in normal operation (ON state), the rotation of the pedal is braked by the pin 1, the detector 1 coincides with the marker 1 to be detected, and the third output circuit (B contact output circuit) of the detector 1 is Since the detector 2 is in the “contact” state and the spring 2 is in a state where the spring 1 is stored, it coincides with the marker 2 to be detected, so the first output circuit (A contact output circuit) of the detector 2 is “ The electric motor is not supplied with the output power of the earth leakage breaker. When the earth leakage breaker trips, the pedal starts rotating by releasing the spring 1 stored in advance. At the same time, the rotating plate 1 and the rotating plate 2 are also rotated, and the third output circuit (B contact output circuit) of the detector 1 is “ The first output circuit (A contact output circuit) of the detector 2 is in the “contact” state, the pedal is still rotated and braked by the pin 1 and stopped, and the detector 1 is for detection. When it coincides with the marker 1, the third output circuit (B contact output circuit) of the detector 1 is in the “contact” state, the output power of the earth leakage breaker is supplied, the electric motor rotates, and the spring 1 starts energizing. When the plate 1 rotates and the spring 1 is urged to a position where the detector 2 and the detected marker 2 coincide with each other, the first output circuit (A contact output circuit) of the detector 2 is in the “OFF” state, and the electric motor The rotation stops and the accumulation of the spring 1 is completed, and the normal operation state Back to. The electromagnetic stopper 2 is supplied with primary input power of the earth leakage breaker via the second output circuit (B contact output circuit) of the detector 2, so that the stored energy of the spring 1 and the detector 2 are detected. When the marker 2 is not energized to the coincidence position, power is not supplied to the electromagnetic stopper 2, and the pin 1 remains braked against the pedal rotation.

In the figure, reference numeral 38 denotes an overall configuration in the case where a brake pedal for braking the pedal rotation shaft by an electromagnetic stopper is arranged on the extension of the rotation shaft separately from the pedal for pushing up the handle of the earth leakage breaker.

Configuration diagram of an auto-reset breaker showing an embodiment of the present invention (a method in which the handle of the earth leakage breaker does not become a neutral position when the earth leakage breaker trips and does not need to be reset in advance for restarting) System diagram of the auto-reset breaker Basic operation of pedal rotation of the auto-reset breaker Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Auto-reset breaker showing an embodiment of the present invention (a system in which the earth leakage breaker handle is in a neutral position when the earth leakage breaker trips, and the earth leakage breaker handle is re-introduced after resetting the earth leakage breaker again) Layout diagram of the breaker Basic operation of pedal rotation of the auto-reset breaker Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Action diagram when the earth leakage breaker trips due to lightning Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanation diagram when the earth leakage breaker trips due to a lightning strike, etc. Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker Operation explanatory diagram when tripping due to an abnormality on the load equipment side of the earth leakage breaker System diagram of an auto-reset breaker in which an electric motor that is a spring accumulating means that is a driving means that rotates a rotating shaft, a switch that is a means for controlling the operation of the electric motor, a gear, and a reverse rotation prevention device are arranged. System diagram of the auto-reset breaker Configuration diagram when the pedal that pushes up the handle of the earth leakage breaker and the pedal that stops the rotation of the rotating shaft are arranged separately

Explanation of symbols

Vin AC voltage input to the earth leakage breaker
Vout AC voltage output from earth leakage breaker
SW1 Micro switch (B contact circuit = including normally closed circuit)
SW2 micro switch (including A contact circuit = normally open type and B contact circuit = normally closed type)

Claims (3)

In the auto-reset breaker that has the function of automatically re-inserting the handle of the earth leakage breaker that has tripped,
By rotating the rotating shaft that rotates by releasing the pre-stored spring and the pedal fixed to the rotating shaft, the handle of the earth leakage breaker is pushed up and the earth leakage breaker is re-introduced on the circumference of the pedal rotation. The first electromagnetic stopper driven by the secondary side output power of the earth leakage breaker and the second electromagnetic stopper driven by the primary side input power of the earth leakage breaker are arranged on the rotation circumference of the pedal. Along with the two pins provided, they are disposed in close proximity so as to engage with the pins, and cooperate to brake the rotation of the pedal and the rotating shaft. The first electromagnetic stopper is equipped with a first pushing means and a second pushing means for pushing a pin for braking the rotation of the pedal, and the second electromagnetic stopper is equipped with a third pushing means. When the pin is pushed by the pushing means to the position where the rotation of the pedal is braked, the spring provided is stored, and once the pushing force is lost, the pin is released by the released spring. It is pushed back to the position where it cannot brake. The first pushing means pushes the first pin to brake the rotation of the pedal when power is output to the secondary side of the earth leakage breaker, and the third pushing means also supplies power to the input side of the earth leakage breaker. If not, the first pin is pushed to brake the rotation of the pedal, and the second pushing means pushes the second pin to brake the pedal rotation when no power is output to the secondary side of the leakage breaker. An auto-reset breaker. In the driving force for automatically re-inserting the handle of the earth leakage breaker that has tripped, in the biasing means of the spring that works as that driving force,
An electric motor driven by the secondary output power of the earth leakage breaker, a spring urged by the electric motor, and a rotation engaged with a rotating shaft of the spring by a gear to know the amount of spring accumulation A first output circuit and a second output circuit that are paired with a detected marker and a detected marker that are provided around the rotating plate, the rotating plate being fixed to the rotating shaft. A detector having two output circuits is arranged, and the rotational position of the rotary plate where the detector detects the detected marker in advance is the rotational position of the rotary shaft where the spring energy is completed, and the spring energy is When completed, one of the first output circuits of the detector is disconnected and becomes non-conductive. When the spring accumulation is not completed and the position of the detected marker and the detector do not match, the first output circuit is connected. And become conductive. 2. The electromagnetic stopper controlled by the primary side input power of the earth leakage breaker according to claim 1, wherein the other second output circuit of the detector performs an output operation opposite to the output operation of the first output circuit. Is fed through this second output circuit. On the other hand, a rotating plate is fixed to the rotating shaft of the pedal so that the rotational position of the pedal can be detected, and a marker to be detected around the rotating plate and a detector paired with the marker to be detected are arranged. The rotation position of the rotating plate where the detector detects the detected marker is set as a stop position of the pedal rotation during the normal operation of the earth leakage breaker, and the third output circuit of the detector when the pedal is at the stop position When the pedal is not in the stop position during normal operation, the position of the detected marker and the detector do not match, and the third output circuit is cut off and becomes non-conductive. The electric motor that biases the spring is controlled by feeding the secondary output power of the leakage breaker to the electric motor through the first output circuit and the third output circuit of the two detectors. The auto-reset breaker according to claim 1.
In order to automatically re-insert the handle of the tripped earth leakage breaker, in the pushing means to raise and lower the handle directly,
Instead of a pedal that pushes up the earth leakage breaker handle and re-injects the earth leakage breaker, the handle of the tripped earth leakage breaker is reset by lowering it, and it also includes two upper and lower horizontal bars that are pushed up and re-introduced. The handle of the earth leakage breaker is arranged between the slider formed in the shape of a letter or the letter B and the two horizontal bars of the slider, and the piston rod connected to the lower end of the slider has the other end as the rotation axis The auto-reset as claimed in claim 1, wherein the slider and the piston rod are moved up and down following the rotation of the gear, and the tripping circuit breaker is restarted in cooperation. breaker.

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