JPH10304553A - Overcurrent passage display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restore a display, even if an overcurrent disappears, and furthermore if the load current of a distribution line decreases to a constant value or less or becomes zero, after the overcurrent of a high-voltage distribution line is detected and displayed. SOLUTION: According to a load current flowing in a high-voltage distribution line A, an AC voltage is induced in the winding 3 of a core 33. The AC voltage of the winding 3 is rectified by a rectifier 51, and makes a detected signal of the load current. The detected signal is smoothed and stabilized in a power-supplying part 11, and is fed to a signal-processing part 10. The signal- processing part 10 outputs a display signal and makes a display part 42 display a fault, when the detected signal becomes a constant value or more. When the fault(failure) of the distribution line has dissolved and an overcurrent disappears and the load current becomes zero, the output of the rectifier 51 becomes zero. A solar battery 46 receives a sun light, feeds the power to the signal-processing part 10 through the powersupplying part 11, and restores the display part 42 after a specified time.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used by hanging directly on a high-voltage distribution line in order to quickly find the point of an accident. The present invention relates to an improvement of an overcurrent passing display device in which the display is performed and the display is restored after a predetermined time has elapsed.

[0001]

2. Description of the Related Art Conventionally, when an overcurrent is applied directly to a high-voltage power distribution line (hereinafter simply referred to as an electric wire), it is detected when an overcurrent flows through the electric wire, and an indication of occurrence of an accident is displayed. An overcurrent passing display device for restoring the display after the display has been already proposed.

In the conventional overcurrent passage display device, a detection signal corresponding to a load current flowing through an electric wire is output from a current detection unit, the detection signal is input to a power supply unit, and the detection signal is output by the power supply unit. Power (voltage) is supplied to each part of the display device by smoothing and stabilizing the voltage to operate each part.

[0003]

By the way, the above-mentioned conventional overcurrent passage display device is designed so that the load flowing through the electric wire is installed when the load connected to the electric wire is small, such as at the end of the electric wire, or when a power failure occurs. Because the current is small or absent, the detection signal output from the current detection unit is also small or missing,
Power (voltage) required to operate each part of the display device
Cannot be supplied. Therefore, even if the overcurrent passage display device detects the passing current and displays the occurrence of an accident, the display of the occurrence of the accident is restored because the detection signal output from the current detection unit is not more than a certain value or disappears after the countermeasure for the accident is completed. In some cases, the display of the occurrence of the accident may be permanently displayed. If the indication of the occurrence of the accident is left as described above, there is a problem that it is unclear whether the previous accident countermeasures have been completed, and it is not possible to confirm the occurrence of a new accident.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and the first invention according to claim 1 detects a current flowing through a high-voltage distribution line (A) and responds to the current. A current detector (9) that outputs a detection signal, a signal processor (10) that determines the presence or absence of an accident based on the detection signal, and a power supply unit (1) that receives the detection signal and supplies power to each unit.
1) a main body case (2), and an upper part of the main body case (2) provided with a mounting part (22) for hanging from the high voltage distribution line (A), and a signal processing part (10) at a lower part. And a display unit (41) which is connected to the display unit and is displayed or non-displayed by a signal of the signal processing unit (10) and a storage cover (47) for covering the display unit (41). The power supply section (11) is connected to a standby power supply section (45) for assisting electric power.

According to a second aspect of the present invention, in the first aspect, the output of the standby power supply section (45) and the output of the current detection section (9) are connected in parallel to the power supply section (11). It is characterized by being connected.

According to a third aspect of the present invention, in the first or second aspect, a solar cell (46) is used for the auxiliary power supply (45).

According to a fourth aspect of the present invention, in the above third aspect, a plurality of solar cells (46) are provided.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, in a state of being suspended on the high-voltage distribution line (A), at an angle of about 180 degrees around a vertical axis. It is characterized in that at least two solar cells (46) are provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes an overcurrent passing display device of the present invention, and 2 denotes a main body case made of a synthetic resin having excellent weather resistance, for example, a polycarbonate resin.
The upper surface 2a is closed and provided with a through hole 2b, and the lower surface is formed in an open cap shape.

A core case 5 made of a synthetic resin and having a lower core 4 around which a winding 3 is wound is screwed into the main body case 2, and a joint 4 a of the lower core 4 is attached to an upper surface of the main body case 2. It is housed so as to slightly protrude upward from the through hole 2b of 2a.

Reference numeral 6 denotes a leaf spring for holding the lower core 4, and reference numeral 7 denotes an annular ridge formed on the outer side of the upper surface so as to surround the through hole 2b. Sealing material 8 for preventing intrusion of rainwater or the like into the space is filled.

A current detecting unit is provided by an annular core 33 composed of the lower core 4 and an upper core 32 described later, a winding 3 wound around the lower core 4, and a rectifier 51 provided on a circuit board 12 described later. 9 are configured,
This unit outputs a detection signal obtained by rectifying a voltage induced in the winding 3 according to a load current flowing through the electric wire A to a signal processing unit 10 and a power supply unit 11 on a circuit board 12 described later.

Reference numeral 12 denotes a circuit board screwed to the lower part of the core case 5, which determines the presence or absence of an accident based on a detection signal output from the rectifier 51 of the current detector 9 and determines that there is an accident. And a signal processing unit 10 which starts counting of time (for example, 5 hours) and outputs a recovery signal when the counting is completed, a detection signal of the current detection unit 9 and a standby power supply unit 45 to be described later. A power supply unit 11 for smoothing and stabilizing the output from the power supply unit and supplying power (voltage) to each unit such as the signal processing unit 10 is mounted.

The signal processing unit 10 compares the detection signal from the current detection unit 9 with a preset set value, and the detected signal exceeds the set value (an overcurrent has passed the electric wire A).
A voltage comparing unit 13 for outputting a signal in the case;
Display signal generator 1 for generating a display signal in response to a signal of
4 and the time is always counted by the (clock) output of the oscillating unit 15. When the display signal is received, the count is reset, the time is started again, and the signal is output after the count is completed. Unit 16, a return signal generation unit 17 that outputs a return signal based on a signal from the time measurement unit 16, and a reset signal that outputs a reset signal when the voltage supplied from the power supply unit 11 exceeds a set value. 1
And a power-on reset unit 18 for resetting the count of 6 to zero.

The power supply section 11 includes a capacitor 19 for smoothing an input signal and the like, and a voltage stabilizing section 20 for keeping the smoothed signal at a constant voltage. The detection signal from the current detection unit 9 and the output from the solar cells 46 of the standby power supply unit 45, which will be described later, are output from the backflow prevention unit 21 respectively.
Are connected in parallel via the current detection unit 9 and the standby power supply unit 4.
5, and power is supplied to each unit such as the signal processing unit 10 and the like.

The backflow prevention unit 21 is connected to the power supply (voltage) of the solar cell 4 of the current detection unit 9 or the standby power supply unit 45.
6 to prevent the current detector 9 and the solar battery 46 of the standby power supply unit 45 from being destroyed.

Reference numeral 22 denotes a mounting portion for suspending the main body case 2 on the electric wire A. The mounting portion 22 is mounted on a support fitting 23 fixedly fitted to the main body case 2 and openably and closably mounted on the support fitting 23. And a supporting bolt 25, and a nut 26 with a washer for mounting and fixed, which is screwed to the supporting bolt 25.

The support bracket 23 uses two pieces 27 formed by stamping or bending a plate material such as a stainless steel plate or a steel plate coated with the same color as the main body case 2 by a press machine or the like. An annular support portion 23a fitted to the annular concave portion 2c provided on the upper peripheral surface of the main body case 2 via a cushioning material of a rubber tube; A locking portion 23b extending vertically upward from the annular support portion 23a and provided so as to face the main body case 2 which fits into the locking recess 2d of the main body case 2 and stops rotation; An electric wire receiving portion 29 is formed to protrude from the portion 23b so as to be located on the upper surface 2a of the main body case 2 and to be formed in a concave shape so that the distal end thereof receives the electric wire A.

Reference numeral 24 denotes an electric wire mounting bracket formed by bending a plate material into a substantially U-shape. One end of the metal mounting 24 can be opened and closed by a pin in a mounting hole of a hinge portion 23c formed at a connecting portion of the supporting bracket 23. The other end is provided with a notch 24b into which the support bolt 25 is inserted and a claw 24c for preventing the nut 26 with a washer from easily coming off.

Reference numeral 31 denotes a concave electric wire pressing member formed of an elastic member such as rubber, which is formed by bending a part of the side surface of the electric wire mounting bracket 24 and projecting laterally from the supporting portion 24d. It is screwed on the lower surface with the concave part facing downward.

Reference numeral 32 denotes an upper core provided on the inner surface side of the electric wire mounting bracket 24. The upper core 32 is attached to the electric wire pressing member 31 so as to straddle the upper side thereof, and the upper core 32 extends downward. Is formed. The joint 32a is in close contact with the joint 4a of the lower core 4 in a state in which the electric wire fitting 24 is closed, and the upper and lower cores 3
The core 33 of the annular magnetic path surrounding the electric wire A is formed by 2, 4. Thus, the core 33 becomes the upper core 3
A so-called cut core composed of 2 and the lower core 4 is formed.

Reference numeral 34 denotes one end of which is fixed to the inner upper surface of the electric wire mounting bracket 24 by a rivet or the like, and the other end is an upper core 32.
Is a spring member elastically in contact with the upper surface of the horizontal portion 32b. Reference numeral 35 denotes a spring disengagement preventing member formed of stainless steel and fitted on the upper surface of the core 32 so that the end of the spring member 34 particularly on the core side does not accidentally come off the upper core 32.

Reference numeral 36 denotes a guide member made of rubber or the like provided near the joint 32a of the upper core 32. When the upper and lower cores 32, 4 are closed, the joint 32 of the upper core 32 is closed.
a is easily guided to the joining portion 4a of the lower core 4, so that the joining portions 32a and 4a of the upper and lower cores 32 and 4 are in close contact with each other, and the contact portions of the joining portions 32a and 4a are covered. And protects the contact portion. The space between the upper core 32 and the guide member 36 is filled with a filler 37.

The support bolt 25 is affixed to the support bolt portion at a position facing the hinge portion 23c by a pin 39 via a center position regulating collar 38. The support bolt 25 has an upper portion (screw portion) side. Is fixed to the wire mounting bracket 24 by being guided into the recess 24b and tightening a nut 26 with a washer. The support bolt 25 is prevented from excessively falling inward (on the side where the joint 4a of the lower core 4 slightly protrudes) by the stopper 2e formed on the upper surface 2a of the main body case 2, and the lower core 4 is joined. The damage of the portion 4a is prevented.

Reference numeral 25a denotes a tightening-preventing piece which is located substantially at the center of the support bolt 25 in the vertical direction and prevents excessive tightening when the wire mounting bracket 24 is tightened by the nut 26 with washer. The damage of the core 33 due to excessive tightening is prevented.

Numeral 40 denotes an attachment made of rubber with an adhesive applied to the back side detachably fitted to the tip of the electric wire receiving portion 29. The attachment has a recess having a size corresponding to the diameter of the electric wire A to be attached. Those having 40a are used after being appropriately replaced.

Reference numeral 41 denotes a display unit provided at a lower portion of the main body case 2 and electrically connected to the signal processing unit 10. The display unit 41 includes a display plate 42 which is driven to rotate, and the display plate 42 which is driven to rotate. Drive unit (not shown) and display cover 44
When a display signal is received from the signal processing unit 10, the display plate 42 is driven by １ ／ rotation by the driving unit, and a colored portion of the display plate 42 is moved from a display window 44 a provided in the display cover 44. (E.g., orange) 42a is rotated to an angle position at which it can be seen and display is performed. When a return signal is received, the display window 44a is driven by a 1/4 turn contrary to the above display, and white or the same color as the display cover 44 is displayed. When the colored portion 42b appears, the display is restored. FIGS. 1B and 7A show the colored portion 42a.
1 (c) and FIG. 7 (b)
Indicates a return state in which the white portion 42b is visible.

Reference numeral 45 denotes a spare power supply unit which is attached to a side surface of the display cover 44 and includes two film-shaped solar cells 46, 46 for generating electric power (voltage) necessary for operating the above-mentioned units. The outputs of the batteries 46 are connected to the power supply unit 11 via the backflow prevention unit 21 in parallel with the detection signal of the current detection unit 9. The power (voltage) generated by the solar cell 46 of the power supply unit 45 is supplied to the power supply unit 11, and the power supply unit 11 can supply power (voltage) to each unit. Also, the solar cell 4 of the standby power supply unit 45
6 is divided into two on the cylindrical side surface of the display cover 44 and 180
Even when subjected to light from any direction of the sun for provided by shifting ° position and to be able to generate power (voltage).

It should be noted that the solar cell 46 of the standby power supply 45
Can be a single crystal, non-crystal, or compound semiconductor. The solar cell 46 may be a thin plate in addition to a film.

Reference numeral 47 denotes a transparent storage cover screw-connected to the lower end of the main body case 2.
Protects the display unit 41 and the solar cell 46 attached to the lower part of the device, and is formed in a cap shape with a transparent polycarbonate resin.

In the state where the overcurrent passing display device 1 is suspended from the electric wire A and attached, the display section 41 changes the rotation angle position (color) of the display plate 42 through the storage cover 47 to the lower side and the side. It can be seen from the side.

The storage cover 47 is integrally connected to the main body case 2 by screwing a screw portion 47a on the upper end inner circumference of the storage cover 47 to the screw portion 2f on the outer circumference of the lower end of the main body case 2. 48 is a plurality of reinforcing ribs formed on the outer periphery of the screw portion 47a for preventing deformation, and 49 is the main body case 2 and the storage cover 47.
2 shows a screw lock material applied to the screwed portion.

Reference numeral 50 denotes a connecting portion 47 of the storage cover 47.
b) is an O-ring provided in the annular groove 47c. When the storage cover 47 is screwed to the main body case 2 by fastening the storage cover 47, the connecting portion 47b of the cover 47 is located on the main body case 2 side. The ring 50 keeps the airtightness of the main body case 2 so that the main body case 2 is elastically adhered to the bonding portion 2g on the main body case 2 side in a state where the main body case 2 is in contact with the bonding portion 2g.

Here, the case where the above-described overcurrent passage display device 1 of the present invention is suspended from the electric wire A will be described. First, as shown in FIG. 9, the nut 26 with the washer of the mounting portion 22 provided on the upper part of the overcurrent passing display device 1 is loosened, the support bolt 25 is lowered to the outside of the main body case 2, and the wire mounting bracket 24 is removed. Rotate clockwise to open. In the above state, the main body case 2 is moved upward from the lower side of the electric wire A as shown by the arrow B so that the electric wire A is brought into contact with the electric wire receiving portion 29 of the support metal member 23, and the opened electric wire mounting bracket 24. Close
Raising the support bolt 25, fitting it into the notch 24b of the electric wire mounting bracket 24, and tightening the washer nut 26 completes the work of suspending the overcurrent passage display device 1 on the electric wire A (FIG. 1). .

At this time, when the diameter of the electric wire A is small, the attachment 40 is attached to the electric wire receiving portion 29 so that the electric wire A is brought into contact with the electric wire A, and the electric wire fitting 24 is closed. When the electric wire fitting 24 is closed, the joint 32a of the upper core 32 provided on the inner surface side of the electric wire fitting 24 is guided to the joint 4a of the lower core 4 by the guide member 36 attached to the portion 32a. , So that they can adhere.

Next, the operation of the overcurrent passing indicator 1 of the present invention will be described with reference to FIGS. The overcurrent passing display device 1 includes a wire A that suspends the display device 1 in normal times.
The load current flowing through the winding 3 is detected by the current detecting unit 9, and the voltage induced in the winding 3 is rectified in accordance with the detected
0 is output to the power supply unit 11. At this time, the signal processing unit 10 compares the detection signal with the set value by the voltage comparing unit 13,
If the detection signal does not exceed the set value, it is determined that there is no accident (overcurrent), and no display signal is output.

However, when an overcurrent occurs in the electric wire A and passes through the display device 1, the current detecting unit 9 responds to the overcurrent and outputs a rectified detection signal to the signal processing unit 10.
Is output to the power supply unit 11. Then, in the signal processing unit 10, the voltage comparison unit 13 compares the detection signal with the set value. In this case, since the level of the detection signal exceeds the set value, the voltage comparison unit 13 outputs a signal to the display signal generation unit 14. Upon receiving the signal, the generating unit 14 outputs a display signal to the display unit 41 and the time measuring unit 16, and the display unit 41 performs rotation driving of the display plate 42 to perform display.
At 6, the count is reset and the counting of time (for example, 5 hours) is started.

Hereinafter, the recovery from the accident display will be described. As shown in FIG. 10, after the occurrence of an overcurrent at time t ₁ , the power (voltage) necessary for the operation of each unit is supplied from the detection signal of the current detection unit 9 corresponding to the load current to the wire A after the display is restored. If the load current of the possible levels) is flowing continuously over 5 hours, the time measuring unit 16 becomes a time instant t ₂ the finished counting the predetermined time (5 hours) the time measuring unit 1
6 outputs a signal to the return signal generation unit 17,
7 outputs a return signal to the display unit 41, and the display unit 41 returns the display.

Further, as shown in FIG. 10, after an overcurrent occurs at time t ₃ , even when no load current is flowing through the electric wire A, the solar battery 46 of the standby power supply unit 45 supplies power (voltage) for operating each unit. There is solar illuminance at the level that can generate electricity,
In a case where the state continues for 5 hours or more, the display at time t ₄ as in the case of the returns.

[0040] Then after the display of the overcurrent passes at time t ₅ as shown in FIG. 11, although the wire A not flowing for a while load current, the load current is displayed in a subsequent time t ₆ Return to the display return current level required to return,
If the state has continued for 5 hours or more, the power supply unit 1
The supply of the power (voltage) from 1 is restarted at time t ₆ , the count of the time measuring unit 16 is reset again by the power-on reset 18, the time (5 hours) starts counting, and the time t ends when the counting ends. _When it becomes ₇ , a signal is output from the time measuring unit 16 to the return signal generating unit 17, which outputs a return signal to the display unit 41, and the display unit 41 returns the display.

[0041] In FIG. 11, post-accident displayed overcurrent occurs at time t _8, in the case where the electric wire A no load current flows, but there is no illumination while the standby power supply unit in a subsequent time t ₉ ( If solar cells 45) (46) becomes a level that can power the power (voltage) for operating each unit display at time t ₁₀ as in the case of the returns.

Further, as shown in FIG.₁₁Over
After indicating the passage of current, wire A
When a load current of a certain level or higher is not flowing,
Time t ₁₂To temporarily return the load current to the level required for recovery.
Time t before 5 hours₁₃No load current again
It becomes. But then at time t₁₄And the load current returns again
Return to the required level and keep the load current for 5 hours or more.
If it is flowing, time t₁₄From the power supply unit 11
When the supply of pressure is restarted, the power-on reset unit 18
Then, the time measurement unit 16 resets the count again.
Start counting time. And finish the count
Time t_Fifteen, The return signal generation unit from the time measurement unit 16
17, and the generator 17 receives the signal and
A return signal is output to the display unit 41, and the display unit 41 restores the display.
Attribute.

[0043] After the overcurrent at time t ₁₆ shown in FIG. 12, if not constant over the load current flows through the wires A, but is not a while illuminance up to time t ₁₇ auxiliary power supply unit at time t ₁₇ 45 of the solar cell 46 is restored to the level that generates power (voltage) for operating the respective units, but again illuminance is eliminated before t ₁₈ reaching 5 hours. However, then again at time t ₁₉
And the illuminance is the power (voltage) at which the solar cell 46 operates each part.
There also returned to levels that can be power generation, displayed at time t ₂₀ as in the case of FIG returns.

[0044] The overcurrent after the occurrence at time t ₂₁ as shown in FIG. 13, when the overcurrent is generated again at time t ₂₂ before a predetermined time (5 hours) elapsed, the current detector 9 to the overcurrent A corresponding detection signal is output and input to the signal processing unit 10. The signal processing unit 10 outputs to the display unit 41 to detect and display signal overcurrent starts counting again resets the counter of the time measuring unit 16, the display unit 41 at time t ₂₃ after a predetermined time has elapsed Output a return signal to reset the display.

[0045]

As described above, in the overcurrent passing display device of the present invention, the standby power supply is connected to the power supply for supplying power (voltage) to the signal processing unit and the like, and the load current is small or no. Even if it is not possible to obtain the power (voltage) for operating each unit by the detection signal output from the detection unit, the power (voltage) can be supplied from the standby power supply unit via the power supply unit, so that the power supply can be reliably performed even after the display of the accident. The display can be restored, and the overcurrent display device of the present invention can be mounted even in a place where the load current flowing through the electric wire is small or no.

Further, since the output of the standby power supply is connected to the power supply in parallel with the output (detection signal) of the current detection unit, the standby power supply can be performed without any special switching operation when the load current is small or no. Since power (voltage) can be supplied from the power supply unit to each unit of the display device via the power supply unit, the structure is simplified.

Further, since a film-shaped or thin-plate-shaped solar cell is used for the auxiliary power supply, space can be saved.
The auxiliary power supply unit can be provided without providing an extra space outside the display device. In addition, since a plurality of solar cells are provided, and furthermore, the display device is disposed at an angle of about 180 ° around the vertical axis in a suspended state, regardless of which direction the high-voltage distribution line is oriented, Since any one of the solar cells receives sunlight from the sun and generates power during one day, the display can be reliably restored.

[Brief description of the drawings]

FIG. 1A is a half sectional view of an embodiment of the present invention,
(B) and (c) are figures explaining a display state.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a plan view of the embodiment of the present invention.

FIG. 4 is a partially cutaway front view of the power supply mounting bracket according to the embodiment of the present invention.

FIG. 5 is a plan view of the power supply fitting of FIG. 4;

FIGS. 6A and 6B are diagrams showing one piece of the support bracket in the embodiment of the present invention, wherein FIG. 6A is a front view and FIG. 6B is a plan view.

FIGS. 7A and 7B are views of the display unit according to the embodiment of the present invention as viewed from below, where FIG. 7A is a front view and FIG. 7B is a plan view.

FIG. 8 is a block diagram of an embodiment of the present invention.

FIG. 9 is a front view showing an open state of the mounting portion in the embodiment of the present invention.

FIG. 10 is a timing chart for explaining the operation of the embodiment of the present invention.

FIG. 11 is a timing chart for explaining the operation of the embodiment of the present invention.

FIG. 12 is a timing chart for explaining the operation of the embodiment of the present invention.

FIG. 13 is a timing chart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 overcurrent passing display device 2 main body case 4 lower core 9 current detection unit 10 signal processing unit 11 power supply unit 22 mounting unit 23 support bracket 24 wire mounting bracket 25 support bolt 26 nut with washer 32 upper core 41 display unit 45 standby power supply Part 46 solar cell 47 storage cover 51 rectification part

Claims (5)

[Claims] 1. A current detector (9) for detecting a current flowing through a high-voltage distribution line (A) and outputting a detection signal corresponding to the current, and a signal processor (9) for determining the presence or absence of an accident based on the detection signal. 10) and a main body case (2) provided with a power supply section (11) for supplying electric power to each section upon receiving the detection signal, and a high-voltage distribution line (A) suspended above the main body case (2). An attachment part (22) for lowering is provided, and a lower part is connected to the signal processing part (10).
In the overcurrent passing display device provided with a display unit (41) which is displayed or non-displayed by a signal from 0) and a storage cover (47) covering the display unit (41), the power supply unit (11) On the other hand, an overcurrent passing display device, wherein a standby power supply unit (45) for assisting power is connected. 2. The power supply according to claim 1, wherein an output of a standby power supply and an output of a current detector are connected in parallel to the power supply. Current passing display device. 3. A solar cell (4) is connected to the standby power supply section (45).
The overcurrent passing display device according to claim 1 or 2, wherein 6) is used. 4. The overcurrent passing display device according to claim 3, wherein a plurality of solar cells (46) are provided. 5. At least two solar cells (46) are arranged at an angle of about 180 degrees around a vertical axis in a posture suspended from the high-voltage distribution line (A). The overcurrent passage display device according to claim 4. [0001]