JP3292880B2 - No-fuse breaker recovery device and no-fuse breaker automatic recovery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a no-fuse breaker (NFB) recovery device and a no-fuse breaker automatic recovery device. More specifically, the present invention relates to a no-fuse breaker with a known no-fuse breaker as it is. A no-fuse breaker recovery device for driving the switch, and even if the no-fuse breaker trips and short-circuits, the power company recovers from power failure and if the secondary circuit is normal, the no-fuse breaker recovery device The switch can be driven to automatically turn on again.

[0002]

2. Description of the Related Art From the viewpoint of a power company, a no-fuse breaker is a switch (SW) for protecting an electric consumer, preventing an abnormal current (overcurrent) from flowing to the consumer, and installing a load facility. It is for protection. When the switch is operated, it is pushed down once, restored and then turned on again to supply power to the load equipment. In this case, the operation of the switch was performed by a person going to the site one by one.

[0003]

The above-mentioned prior art has the following problems. At a certain base station, a no-fuse breaker was activated by a lightning surge current, and when commercial power was cut off, a secondary battery was used to supply communication equipment. For this reason, since the supply time of the secondary battery is limited, one person was dispatched and turned on each time to restore the no-fuse breaker. Recently, the number of base stations for mobile phones has increased remarkably, so that when a cold front passes and a thundercloud occurs, no-fuse breakers operate everywhere, and it takes a lot of trouble and operation to recover. SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the related art, and has as its object to provide the following.

[0004] Based on the occurrence of thunderclouds and the warning that the commercial power supply of the base station is cut off, assuming that the no-fuse breaker is operating, the voltage on the primary side recovers even if no person goes to the site, and the secondary side. If the circuit is normal, the no-fuse breaker is automatically restored. That is, 1. I want to automatically recover even if a no-fuse breaker operates under the influence of a lightning surge current. 2. The thundercloud disappears, and commercial power can be turned on after stabilization. 3. Assuming a secondary circuit short-circuit accident, after re-starting at an arbitrary time (for example, every 30 minutes), the recovery unit stops operation and sends an alarm to the manned station that the secondary circuit has failed. 4. A switch driving stepping motor capable of accurate rotation control is used for restoring the no-fuse breaker without changing the switches of the existing no-fuse breaker.
Then, the operation of the switch driving stepping motor is controlled based on the presence or absence of a voltage on the primary side (input side) and a secondary side (output side) as viewed from the no-fuse breaker.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention is as follows. That is,
In the first invention, the switch 3B protruding from the surface of the no-fuse breaker main body 3A is normally pushed obliquely upward, so that the no-fuse breaker 3 can be used for lightning surge current or the like. When the switch 3B is operated under the influence of the above, the switch 3B is stopped in a horizontal state, and when the switch 3B is turned on again, the switch is depressed once to a diagonally lower state and then pushed up diagonally upward to be turned on again. Leg 1A in the no-fuse breaker 3
, A guide pipe portion 1B, an elevating rod portion 1C, and a switch operation portion 1D. The support leg portion 1A is located above the no-fuse breaker 3, and the switch operating direction in the no-fuse breaker is determined. Are arranged and fixed in an orthogonal direction, and the guide pipe portion 1B is formed of a vertical pipe having a predetermined length, and corresponds to the height of the switch at the tip of the support leg portion 1A, and is parallel to the operation direction of the switch. It is attached, and the elevating rod part 1C is a square rod body 1C1 for advance and retreat.
And a stepping motor 1C2 for driving a switch. The forward and backward rectangular bar 1C1 is opened from the upper end to the vertical bar boom 1C11 mounted in the guide pipe portion 1B and the axis of the vertical bar boom. Screw hole 1C12,
It is composed of a screw rod 1C13 screwed into this screw hole,
The switch driving stepping motor 1C2 is supported above the no-fuse breaker 3 and is connected to the upper end of the screw rod 1C13.
The push-down hook 1D1 is composed of a push-down hook 1D1 and a re-insertion hook 1D2. , And the reloading hook 1D2 is pivotally attached to the lower position in the vertical cut 1D3 with a horizontal pin P, and the lower end of the pressing hook 1D1 abuts on the root of the switch 3B of the no-fuse breaker 3 from above. In addition, the reloading hook 1D2 is composed of a vertical portion 1D21 and a curved portion 1D22 which is curved with the tip of the vertical portion directed upward. When the reloading hook 1D2 rises, no A wire configured to abut against the switch 3B of the fuse breaker 3 from below, and having a spring portion between the upper end of the reloading hook 1D2 and the tip of the guide pipe portion 1B. 1D4 is a no-fuse breaker recovery device that has been stretched.

In this case, the following configuration can be adopted. At a predetermined location on the side of the vertical bar boom 1C11,
A lamp 1E for stopping at the time of pressing down and a lamp 1F for stopping at the time of re-insertion are provided in the vertical position, and optical sensors 1E1 and 1F1 corresponding to these lamps are provided near the vertical bar boom 1C11. It is configured such that damage due to excessive depression of the switch of the no-fuse breaker or excessive passage at the time of re-closing can be eliminated.

The second invention comprises a no-fuse breaker restoring device 1 of the first invention and a control circuit 2A. Voltage detection relays 2A1 and 2A2 are provided on the primary and secondary sides of the no-fuse breaker 3 in advance. The primary-side voltage detection relay is configured to be a circuit that can detect a voltage when there is no voltage on the secondary-side voltage detection relay, and a timer circuit 2A3 when there is a voltage on the primary-side voltage detection relay. , The control circuit 2A4, the signal is sequentially sent to the switch drive circuit of the no-fuse breaker, the timer relay operates n minutes later to transfer the signal to the control circuit, and controls the operation of the switch drive stepping motor 1C2 of the no-fuse breaker. It is a no-fuse breaker automatic recovery device configured as described above.

The operation is as follows. 1. When a thundercloud occurs, a lightning surge current enters the no-fuse breaker and the no-fuse breaker operates. 2. Since the secondary-side voltage detection relay is reset to a state of no voltage, a relay circuit for detecting the primary-side voltage is created. 3. When the power supply of the power company is restored, the primary-side voltage detection relay operates, and the control circuit that drives the no-fuse breaker operates. 4. Assuming a voltage flap from the power company (waiting for the thundercloud to pass), after about 20 to 30 minutes, the no-fuse breaker recovery unit 1 that drives the no-fuse breaker is operated. The operation of the no-fuse breaker recovery unit 1 is as follows. A. Referring to FIG. 6, when the no-fuse breaker is tripped, the position of switch 3B changes downward.
(In FIG. 1, the position of the switch 3B changes horizontally from above.) When a voltage is detected on the primary side, the switch driving stepping motor 1C2 rotates forward by a signal output from the control circuit, and the vertical angle The rod-shaped boom 1C11 starts moving to the right. B. Referring to FIG. 7, when vertical bar-shaped boom 1C11 moves to the right, switch 3B is tilted to the right by pushing down hook 1D1. (In FIG. 1, the position of the switch 3B moves downward from horizontal, and the switch 3B is reset.) In order to confirm that the switch has been pushed, the vertical bar boom 1C1 is checked.
The light of the lamp 1E for stopping at the time of depression in 1 is detected by the optical sensor 1E1, and the operation is stopped. At this time, since the vertical bar-shaped boom 1C11 has moved to the right, the wire 1D4 having a spring portion is extended, and the reloading hook 1D2 is in a state where the switch 3B is just hooked. The control circuit is
This time, a reverse rotation signal is applied to the switch driving stepping motor 1C2 by a signal detected by the light sensor 1E1 from the light of the lamp 1E1 at the time of pressing down, and the switch 3B is turned on again. D. Referring to FIG. 8, switch 3B is in a re-input state, and switch 3B is located horizontally. (In the case of FIG. 1, the position of the switch 3B is being changed from below to above.) When it is confirmed that the switch 3B is turned on again, the vertical bar boom 1C is confirmed.
The light sensor 1F1 detects the light of the re-turn-on stop lamp 1F attached to the switch 11, and the switch driving stepping motor 1C2 stops operating. As a result, the wire 1D4 having a spring portion attached to the vertical bar-shaped boom 1C11 is contracted, and the re-input hook 1D2 is switched to the switch 3B.
Out of the way. Thus, a series of operations are completed, and each component returns to the position shown in FIG. 5 to prepare for the next recovery operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments with reference to the drawings. Reference numeral 1 denotes a no-fuse breaker recovery device according to the first invention, and reference numeral 2 denotes a no-fuse breaker automatic recovery device according to the second invention.

Reference numeral 3 denotes a known no-fuse breaker in which the present invention is embodied, which has the following structure. 3A is a main body of the no-fuse breaker, and 3B is a switch protruding from the surface of the main body of the no-fuse breaker. (Note that the following description is based on the case where the no-fuse breaker 3 is supported in a vertical state.) In a normal case, the switch 3B is pushed up obliquely upward as viewed from the side as shown in FIG. B. When the no-fuse breaker 3 operates under the influence of a lightning surge current or the like, the switch 3B stops in a horizontal state (the state shown by the arrow B) when viewed from the side. C. When the switch 3B is turned on again in such a state, the switch is once depressed to an obliquely lower state (the state of arrow C), and then the state of the above A, that is, the switch is pushed up obliquely and turned on again. It is configured. The present invention has been made by directly looking at such a state of the no-fuse breaker.

No fuse breaker recovery device 1 of the first invention
Will be described. The present invention includes a supporting leg 1A, a guide pipe 1B, a lifting rod 1C, and a switch operating unit 1D. A. The support leg 1A is located above the no-fuse breaker 3, and is disposed and fixed in a direction orthogonal to the operation direction of the switch in the no-fuse breaker. B. The guide pipe portion 1B is formed of a vertical pipe having a predetermined length, and corresponds to the height of the switch at the tip of the support leg portion 1A.
And it is mounted in a state parallel to the operating direction of the switch. C. The elevating rod portion 1C includes an advancing / retracting rectangular rod 1C1 and a switch driving stepping motor 1C2. a. The reciprocating square bar 1C1 is provided with a vertical bar boom 1C11 mounted in the guide pipe portion 1B, a screw hole 1C12 formed from the upper end of the shaft of the vertical bar boom, and screwed into the screw hole. Of the screw rod 1C13. b. The switch driving stepping motor 1C2 is supported by being positioned above the no-fuse breaker 3,
It is connected to the upper end of the screw rod 1C13. The switch driving stepping motor is configured to freely control the normal rotation and the reverse rotation. As a result, when the switch driving stepping motor is rotated forward or backward, the advancing / retracting rectangular bar 1C1 advances / retreats with respect to the switch while being guided by the guide pipe portion. That is, when the switch of the no-fuse breaker is depressed (restored), the circuit rotates forward. Reverse when reconnecting the no-fuse breaker. D. The switch operation unit 1D includes a hook 1D1 for pressing down,
It is composed of a reloading hook 1D2. The push-down hook 1D1 is a vertical bar-shaped boom 1 in a rectangular bar for advance / retreat.
The hook 1 for re-injection is fixed at an upper position in a vertical cut 1D3 formed at the center of the tip (the lower end in the figure) of C11.
D2 is pivotally connected by a horizontal pin P at a lower position in the vertical cut 1D3. The lower end of the pressing hook 1D1 is configured to abut on the root of the switch 3B of the no-fuse breaker 3 from above. In addition, the reloading hook 1D2
Is composed of a vertical portion 1D21 and a curved portion 1D22 having the tip of the vertical portion curved upward, and the curved portion contacts the switch 3B of the no-fuse breaker 3 from below when the re-entry hook 1D2 rises. It is configured as follows. A wire 1D4 having a spring portion is stretched between the upper end of the reloading hook 1D2 and the tip of the guide pipe portion 1B.

At predetermined positions on the side surface of the vertical bar-shaped boom 1C11, a lamp 1E for stopping when pressed down and a lamp 1F for stopping when re-applying are arranged in an up and down position, and near the vertical bar-shaped boom 1C11. Are provided with optical sensors 1E1 and 1F1 corresponding to both lamps. As a result, it is possible to prevent damage due to excessive depression of the switch of the no-fuse breaker or excessive re-application of the switch.

A description will now be given of a no-fuse breaker automatic recovery device 2 according to the second invention. The present invention includes a no-fuse breaker recovery unit 1 and a control circuit 2A. The configuration of the control circuit 2A is as follows. In advance, the voltage detection relay 2 is connected to the primary side and the secondary side around the no-fuse breaker 3.
A1 and A2 are prepared, and the primary-side voltage detection relay is configured as a circuit that can detect a voltage when there is no voltage on the secondary-side voltage detection relay. When there is a voltage at the voltage detection relay on the primary side, the timer circuit 2A3 and the control circuit 2A
4. The signals are sequentially sent to the switch drive circuit of the no-fuse breaker. The timer relay operates after n minutes to transfer a signal to the control circuit, and controls the operation of the switch driving stepping motor 1C2 of the no-fuse breaker.

[0014]

EXAMPLES Further, as a result of an experiment under the following conditions,
Very good results were obtained. Reference numeral 2A5 denotes a case housing the no-fuse breaker restoring device 1, the control circuit 2A, and the like.

[0015]

Since the present invention is configured as described above, the following effects can be obtained. Primary side (power company) after the no-fuse breaker switch operates at ground fault at the base station
If the voltage is restored and the secondary side circuit is normal, this device drives the switch and automatically turns on again. In this case, the voltage status of the primary side (power company) and the secondary side can be identified by the alarm lamp, so that the manned station can know the power supply status of the base station. Also, if this device cannot be turned on by any means, the fault alarm and the primary (power company) and secondary voltage alarms are transferred to the manned station, so the no-fuse breaker switch is turned on as usual. There are no more dispatches to do.

[Brief description of the drawings]

FIG. 1 is a left side view of a no-fuse breaker.

FIG. 2 is a left side view of the no-fuse breaker recovery device.

FIG. 3 is a front view of the same.

FIG. 4 is a sectional view taken along line AA.

FIG. 5 is a left side view showing a state of the no-fuse breaker recovery device in a normal state of the no-fuse breaker.

FIG. 6 is a left side view showing a state where a switch is depressed in an operation direction when the no-fuse breaker is operated.

FIG. 7 is a left side view showing a state at the start of re-closing after the switch is pressed down in the operation direction by the operation of the no-fuse breaker;

FIG. 8 is a left side view showing a state during re-insertion.

FIG. 9 is a control circuit schematic diagram of a no-fuse breaker automatic recovery device.

[Explanation of symbols]

 1 No-fuse breaker recovery unit 2 No-fuse breaker automatic recovery device 3 No-fuse breaker 3B switch 1A Support leg 1B Guide pipe 1C Lifting rod 1D Switch operation

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-20994 (JP, A) Japanese Patent Publication No. Sho 40-6144 (JP, B1) Jiko 48-29972 (JP, Y1) (58) Field (Int.Cl. ⁷ , DB name) H01H 73/02

Claims (3)

(57) [Claims] A switch (3B) protruding from the surface of a body of a no-fuse breaker (3A) is normally pushed obliquely upward in a normal state. When the switch (3B) is operated under the influence of a lightning surge current or the like, the switch (3B) stops in a horizontal state, and when the switch (3B) is turned on again, the switch is once depressed to a diagonally lower state and then depressed diagonally upward. No-fuse breaker configured to be lifted and reclosed (3)
, Comprises a support leg (1A), a guide pipe (1B), an elevating rod (1C), and a switch operating unit (1D).
The support leg (1A) is located above the no-fuse breaker (3), and is disposed and fixed in a direction orthogonal to the operation direction of the switch in the no-fuse breaker, and the guide pipe (1B) has a predetermined position. It is composed of a vertical pipe having a length and is attached to the tip of the support leg (1A) in a state corresponding to the height of the switch and parallel to the operating direction of the switch. Rod (1C1)
And a stepping motor (1C2) for driving a switch, and a rectangular bar body (1C1) for advancing and retreating is a vertical bar-shaped boom (1C11) mounted in a guide pipe portion (1B).
And a screw hole (1C12) opened from the upper end in the shaft center of the vertical bar boom, and a screw rod (1C13) screwed into the screw hole. The switch driving stepping motor (1C2) , Supported above the no-fuse breaker (3), connected to the upper end of the screw rod (1C13), and the switch operating part (1D) includes a pressing hook (1D1) and a re-feeding hook. The push-down hook (1D1) is fixed at an upper position in a vertical cut (1D3) formed at the center of the tip of the vertical bar-shaped boom (1C11) in the advance / retreat rectangular bar. The re-injection hook (1D2) is pivotally connected to the lower position in the vertical cut (1D3) by a horizontal pin (P), and the lower end of the push-down hook (1D1) is connected to the switch (3) of the no-fuse breaker (3). 3B) Root Is configured to abut from above, also on again hook (1D2), the vertical portion (1D
21) and a curved portion (1D22) with the end of the vertical portion curved upward, and the curved portion is a switch (3B) of the no-fuse breaker (3) when the re-entry hook (1D2) is raised. And a wire (1D) having a spring portion between the upper end of the reloading hook (1D2) and the tip of the guide pipe portion (1B).
(4) A no-fuse breaker recovery device characterized by being stretched. 2. A push-down stop lamp (1E) and a re-start stop lamp (1F) are arranged at predetermined positions on the side surface of the vertical rod-shaped boom (1C11). Optical sensors (1E1, 1F1) corresponding to these lamps are located near the vertical bar boom (1C11).
2. The no-fuse breaker restoring device according to claim 1, wherein the no-fuse breaker recovery device is provided so as to be able to eliminate breakage due to over-pressing of a switch of the no-fuse breaker or excessive passage at the time of re-input. 3. A non-fuse breaker restoring device (1) according to claim 1 or 2, and a control circuit (2A), and a primary side and a secondary side centering on the no-fuse breaker (3) in advance. , Voltage detection relays (2A1, 2A2) are prepared, and the primary-side voltage detection relay is configured in a circuit that can detect a voltage when there is no voltage on the secondary-side voltage detection relay. When there is a voltage in the timer, the signal is sequentially sent to the timer circuit (2A3), the control circuit (2A4), and the switch drive circuit of the no-fuse breaker, and the timer relay operates after n minutes to transfer the signal to the control circuit. An automatic recovery device for a no-fuse breaker, which is configured to control the operation of a stepping motor (1C2) for driving a switch of the no-fuse breaker.