JP7255185B2 - Status indicator for high voltage conductors - Google Patents

Description

The present invention relates to a status indicator for high voltage conductors.

High-voltage conductors such as high-voltage lines and bus conductors are energized with high-voltage alternating current (alternating current with a voltage exceeding 600 V and not more than 7000 V). Accidents such as electric shocks can occur if high-voltage alternating current approaches an energized high-voltage conductor carelessly, so displaying the status of whether or not high-voltage alternating current is energized is useful from the viewpoint of accident prevention. be.
For example, in Patent Document 1, a current collecting unit is arranged near a high-voltage line (high-voltage circuit) supported by a steel tower and collects current by an induced electric field induced near the high-voltage line, and a current collecting unit. and a state-of-charge indicator that is driven by electric power and indicates that a high-voltage AC is being supplied to a high-voltage line (that the high-voltage circuit is being charged).
In the state-of-charge indicating device of Patent Document 1, the current collector is made of a large metal mesh (for example, about 1 m×1 m in size), and is arranged near the high-voltage line. The state-of-charge indicator is electrically connected to the current collector by a wiring cable, is arranged above or below the steel tower, and is grounded through the steel tower.

In general, high-voltage alternating current is used after being converted to low-voltage alternating current (voltage of 600 V or less). In order to convert high-voltage alternating current to low-voltage alternating current, high-voltage power receiving equipment (switch gear) that receives high-voltage alternating current from the high-voltage system may be used.
High-voltage power receiving equipment consists of bus conductors that receive high-voltage alternating current from the high-voltage system, circuit breakers that switch circuits and interrupt abnormal currents, and equipment that protects equipment from surge voltages caused by lightning strikes. This is a facility in which a lightning arrester, etc., is housed inside a metal housing. High voltage power receiving equipment also includes a cubicle type high voltage power receiving equipment equipped with a transformer that converts high voltage alternating current to low voltage alternating current.
As mentioned above, the housing of the high-voltage power receiving equipment contains devices such as busbar conductors and circuit breakers that conduct high-voltage alternating current, so workers need to be careful not to touch these devices. There is However, since each device is tightly housed inside the housing, it is not possible to directly display a display (work section display) for calling attention to these devices. For example, in high-voltage power receiving equipment, a rope is stretched around the outside of the housing to restrict access to the inside of the housing, and a warning display is displayed on the housing.
When inspecting, replacing, or repairing the high-voltage power receiving equipment, these operations are performed with the housing opened. At this time, the operator uses a voltage detector to confirm that each device is not energized, but as described above, each device does not have a warning display.

JP 2018-66565 A

It is desirable to display the state of whether or not high-voltage alternating current is energized for each device included in the high-voltage power receiving equipment. In addition, it is difficult to install in the empty space inside the housing of high-voltage power receiving equipment, and it is necessary to take measures to prevent short circuits. Furthermore, in order to install the current collector inside the housing, the high-voltage power receiving equipment must be turned off.
The present invention has been made in view of such circumstances, and its object is to provide a high-voltage conductor status display device that can be installed even in a narrow empty space in a housing without causing power failure of high-voltage power receiving equipment. It is to be realized.

In order to solve the above problems, the present invention is used in a high-voltage power receiving equipment in which a high-voltage conductor through which a high-voltage alternating current received from a high-voltage system is energized is housed inside a housing, and the high-voltage conductor is energized with the high-voltage alternating current. a high-voltage conductor status display device for indicating that the high-voltage conductor is connected to the high-voltage conductor, comprising: an insulating fixing portion made of an electrical insulator fixed to the high-voltage conductor; and a high-voltage alternating current when the insulating fixing portion is fixed to the high-voltage conductor. an electromotive conductor disposed in an electromagnetic field generated by energizing the high-voltage conductor and generating a potential difference due to changes in magnetic flux in the electromagnetic field ; and a capacitor forming an LC circuit together with the electromotive conductor. , a closed circuit is formed between a rectifying section for passing a current in one direction based on the potential difference generated in the electromotive conductor, the electromotive conductor, the capacitor, and the rectifying section, and from the rectifying section a display portion that operates based on the current of the high voltage conductor to indicate that the high voltage alternating current is being passed through the high voltage conductor; is detachably locked , and the LC circuit is resonated by energization of the high-voltage alternating current to the high-voltage conductor .

ADVANTAGE OF THE INVENTION According to this invention, even if it is a narrow empty space in a housing|casing, a state display apparatus can be attached, without power-supplying high-voltage power receiving equipment.

1A is a perspective view of a status display device, FIG. 1B is a bottom view of the status display device, and FIG. 1C is a block diagram illustrating an electrical configuration of the status display device; FIG. (a) is a diagram explaining the inside of the cubicle-type high-voltage power receiving equipment, (b) is a diagram illustrating the disconnector provided in the high-voltage power receiving equipment, and (c) is the tip of the insulation operation rod that opens and closes the disconnector. It is a figure explaining. It is a figure explaining operation which makes the latching|locking part of an insulation operation rod latch to a to-be-latched part. It is a figure explaining operation which operates an insulation operation stick and attaches a state display apparatus to a bus-line conductor. (a) is a diagram showing an insulation fixing portion spread by a bus conductor, and (b) is a diagram showing a status display device attached to the bus conductor. (b) is a perspective view of a state display device having a wide insulating fixing portion, and (b) is a perspective view of a state display device attached to a bus conductor. (a) is a perspective view of a state display device for an insulation-coated electric wire, (b) is a perspective view of the state display device attached to an insulation-coated electric wire. (a) is a block diagram explaining the drive circuit of the modified example, (b) is a diagram explaining the operation when the light emitting diode of the display part is operating normally, (c) is a rectification of the light emitting diode of the display part. FIG. 10 is a diagram for explaining the operation when current from the unit stops flowing;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, unless there is a specific description, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention. .

<Overview of status display device 1>
First, an overview of the status display device 1 according to this embodiment will be described. FIG. 1(a) is a perspective view of the status display device 1, FIG. 1(b) is a bottom view of the status display device 1, and FIG. 2(a) is a diagram for explaining the inside of the cubicle-type high-voltage power receiving equipment 20, FIG. 2(b) is a diagram for explaining the disconnector 29 provided in the high-voltage power receiving equipment 20, and FIG. FIG. 3 is a diagram for explaining a tip portion 32 of an insulation operating rod 30 that performs an opening/closing operation;
The status display device 1 shown in FIGS. 1A to 1C is fixed to a bus conductor (high voltage conductor) 23 provided in the high voltage power receiving equipment 20 shown in FIG. It indicates whether or not high voltage AC is energized. The status display device 1 is attached to the bus conductor 23 from a location away from the bus conductor 23 using the insulating operation rod 30 shown in FIG. 2(c).

As shown in FIGS. 1A to 1C, the status display device 1 includes an insulating fixing portion 2a made of an electrical insulator (synthetic resin having electrical insulation) fixed to the bus conductor 23, and an insulating fixing portion 2a. 2a is fixed to the bus conductor 23, a current collector 3 (electromotive conductor 3a) arranged in an electromagnetic field generated by passing a high voltage alternating current through the bus conductor 23, and a magnetic flux in the electromagnetic field. A rectifying section 12 (rectifying diode 12a) that operates based on the potential difference generated in the electromotive conductor 3a due to the change and causes the current I to flow in one direction, the electromotive conductor 3a, and the rectifying section 12 are closed. A display unit 4 that forms a circuit and operates based on the current I from the rectifying unit 12 to display that a high voltage alternating current is being supplied to the bus conductor 23; , a locked portion 6 (a through hole 6a into which the locking portion 32a can be inserted) to which the locking portion 32a (see FIG. 2(c)) provided on the insulating operating rod 30 is detachably locked; I have.
In the state display device 1 having the above configuration, a potential difference is generated in the electromotive conductor 3a due to a change in the magnetic flux in the electromagnetic field, and the rectifying section 12 operates based on the potential difference generated in the electromotive conductor 3a to operate in one direction. , and the display section 4 operates on the basis of the current I from the rectifying section 12 to display that the bus conductor 23 is energized. In the state display device 1, the driving circuit 10 including the electromotive conductor 3a, the rectifying section 12, and the display section 4 can operate without being grounded. Therefore, the status display device 1 can be downsized by providing the drive circuit 10 in the housing 2 or the like, and the status display device 1 can be installed even in a narrow empty space inside the housing of the high-voltage power receiving equipment 20 .
Further, when the status display device 1 is attached to the bus conductor 23, the locking portion 32a of the insulating operating rod 30 is locked to the locked portion 6, the insulating operating rod 30 is operated, and the insulating fixing portion 2a is attached to the bus conductor 23. , the status display device 1 can be attached to the bus conductor 23 from a safe location sufficiently away from the bus conductor 23. Therefore, the status display device 1 can be attached without causing a power failure of the high-voltage power receiving equipment 20 .

<Details of the status display device 1>
Details of the above-described state display device 1 will be described below. As shown in FIGS. 1(a) and 1(b), the status display device 1 is made of flexible and electrically insulating synthetic resin, and includes an insulating fixing portion 2a fixed to a bus conductor 23. When the housing 2 and the insulating fixing portion 2a are fixed to the bus conductor 23, the current collector 3 (electromotive conductor 3a) is arranged in an electromagnetic field generated by passing a high-voltage alternating current through the bus conductor 23. and a display portion 4 provided on the front surface of the housing 2 to indicate that the bus conductor 23 is energized by lighting up, and a display portion 4 provided on the front surface of the housing 2 and below the display portion 4, A temperature-indicating seal 5 (temperature-indicating portion) that changes color or develops color when the temperature reaches a predetermined temperature or higher, and a locking portion 32a of the insulating operation rod 30 provided on the front surface of the housing 2 and above the display portion 4. and a locked portion 6 that is detachably locked.
The housing 2 includes a holding member 2b and an insulating fixing portion 2a having a claw portion 2c, and a circuit accommodating portion provided on the back side of the display portion 4 and accommodating a portion of the drive circuit 10 shown in FIG. 1(c). and a seal adhering surface 2e provided on the front surface of the housing 2 and below the circuit accommodating part 2d to which the temperature indicating seal 5 is adhered.

The clamping members 2b of the insulating fixing portion 2a are rectangular plate-shaped portions, and are provided on the left and right sides of the housing 2, respectively. An insertion cavity X is formed between the pair of clamping members 2b, and each clamping member 2b clamps and fixes the bus conductor 23 inserted into the insertion cavity X from the left and right (see FIG. 5(b)). . The claw portions 2c protrude toward the insertion space X side at the rear side end portions of the pair of holding members 2b, and engage with the edges of the bus conductor 23 inserted into the insertion space X so that the state display device 1 is positioned to hold the bus conductor. Hold it so that it does not come off from 23.
The circuit accommodating portion 2d accommodates circuit elements other than the collector portion 3 and the display portion 4, specifically, the electric storage portion 11 and the rectifying portion 12, of the drive circuit 10 shown in FIG. 1(c). Note that the drive circuit 10 will be described later.

The temperature indicating sticker 5 attached to the sticker attachment surface 2e changes color (or develops color) when the temperature exceeds a predetermined temperature within a temperature range of, for example, 50°C to 120°C. The temperature indicating seal 5 visually displays the temperature of the bus conductor 23 . The temperature of the bus conductor 23 rises due to the application of the high-voltage alternating current. Also, the temperature of the bus conductor 23 rises to a higher temperature than during normal operation when an abnormality occurs. For example, the temperature of the bus conductors 23 rises to a temperature higher than that during normal operation when the electrical resistance value rises due to, for example, loosening of connecting screws (not shown) connecting the bus conductors 23 .
By making the color of the temperature indicating sticker 5 different between the temperature range during non-energization and the temperature range during normal operation, the operator who performs inspection work etc. of the high voltage power receiving equipment 20 can detect the color change of the temperature indicating sticker 5. Based on this, it can be recognized that the temperature of the bus conductor 23 is rising, in other words, that the bus conductor 23 is energized.
Furthermore, by varying the color of the temperature indicating sticker 5 in the temperature range during non-energization, the color of the temperature indicating sticker 5 in the temperature range during normal operation, and the color of the temperature indicating sticker 5 in the temperature range when an abnormality occurs, the operator can can also determine the operation state of the high-voltage power receiving equipment 20 (operation stop state, normal operation state, abnormal state).

The current collector 3 includes an electromotive conductor 3a shown in FIG. 1(c). The electromotive conductor 3a is composed of, for example, a coil-shaped conductor pattern suitable for current collection. As shown in FIGS. 1(a) and 1(b), the current collecting portion 3 is provided inside the clamping member 2b. placed in the electromagnetic field generated by 23. In this electromagnetic field, when a load current flows through the bus conductor 23, the magnitude and direction of the magnetic flux change, and the change in the magnitude and direction of the magnetic flux causes a potential difference in the electromotive conductor 3a. As will be described later, display is performed by the display unit 4 based on the potential difference generated in the electromotive conductor 3a.
In this embodiment, since the electromotive conductor 3a is provided inside the clamping member 2b, the collector portion 3 can be placed in the electromagnetic field generated from the bus conductor 23 simply by fixing the bus conductor 23 with the insulating fixing portion 2a. can be placed in

The display unit 4 includes a light emitting diode 4a shown in FIG. 1(c) and a cover lens 4b shown in FIGS. 1(a) and 1(b). The light-emitting diode 4a emits light while the bus conductor 23 is energized (specifically, when a load current is flowing through the bus conductor 23). The cover lens 4b is made of a synthetic resin that diffuses and transmits light, and covers the outside of the light emitting diode 4a. Therefore, in the display unit 4, the light-emitting diode 4a emits light while the bus conductor 23 is energized, and the light from the light-emitting diode 4a illuminates the entire cover lens 4b.
Therefore, when inspecting the high-voltage power receiving equipment 20 or the like, the operator can visually recognize that the bus conductor 23 is energized based on the light emission state of the display section 4 (cover lens 4b).

Next, the drive circuit 10 of the status display device 1 will be described. As shown in FIG. 1(c), the driving circuit 10 includes a current collecting portion 3 having a conductor 3a for electromotive force, a display portion 4 having a light emitting diode 4a, a power storage portion 11 having a capacitor 11a, and a rectifying section 12 having a rectifying diode 12a. A closed circuit is formed by the electromotive conductor 3a, the light emitting diode 4a, the capacitor 11a, and the rectifying diode 12a. Specifically, a capacitor 11a is connected to one end 3b of the electromotive conductor 3a, a cathode of the light emitting diode 4a is connected to the other end 3c of the electromotive conductor 3a, and a capacitor is connected to the anode of the rectifying diode 12a. 11a is connected, and the anode of the light emitting diode 4a is connected to the cathode of the rectifying diode 12a.

In the drive circuit 10, the combination of the electromotive conductor 3a and the capacitor 11a constitutes an LC circuit. The resonance frequency of the LC circuit is aligned with the frequency of the high-voltage alternating current supplied to the bus conductor 23 . Therefore, due to changes in the magnitude and direction of the magnetic flux generated by energization of the bus conductor 23, a potential difference (induced voltage) is generated in the electromotive conductor 3a, and the potential of the capacitor 11a changes to the potential of the one end 3b of the electromotive conductor 3a. change according to The rectifying diode 12a passes a current I in one direction from the capacitor 11a to the light emitting diode 4a, and the light emitting diode 4a emits light by the current I rectified in one direction by the rectifying diode 12a. The magnitude of the current I fluctuates in proportion to the magnitude of the load current flowing through the bus conductor 23, and ranges from several mA to ten and several mA.
As described above, the drive circuit 10 operates independently without being grounded, so that it is suitable for miniaturization and can be provided in the housing 2 . Furthermore, since grounding is not required, it is possible to reliably prevent a ground fault caused by connecting the ground terminal to the bus conductor 23 .

As shown in FIGS. 1(a) and 1(b), the locked portion 6 is provided on the front upper portion of the housing 2 and has a through hole 6a penetrating in the left-right direction. When the locking portion 32a is inserted into the through hole 6a, the locked portion 6 is locked by the locking portion 32a, and when the locking portion 32a is removed from the through hole 6a, the locking by the locking portion 32a is released. Thus, by inserting and withdrawing the locking portion 32a from the through hole 6a, the locked portion 6 can be locked and unlocked. Easy to operate.

<Regarding the high-voltage power receiving equipment 20>
Next, the high-voltage power receiving equipment 20 will be described. The cubicle-type high-voltage power receiving equipment 20 shown in FIG. a door 22 made of metal, a bus conductor 23 housed in the housing 21 and energized with a high-voltage alternating current received from an external high-voltage system, and a bus line disposed in the upper rear part of the housing and in the middle of the bus conductor 23. A breaker 24 that opens and closes the conductor 23 and cuts off an abnormal current, a lightning arrester 25 that is arranged in the rear and lower part of the housing and protects each device of the high-voltage power receiving equipment 20 from a surge voltage caused by a lightning strike. A transformer 26 is arranged in the front and lower part of the inside of the housing and converts high-voltage alternating current into low-voltage alternating current. An insulated wire (KIP wire) 27 for energizing an instrument transformer (none of which is shown), and an equipment housing section 28 housing instrumentation equipment, operation equipment, etc. at the front of the inside of the housing. , is equipped with

The housing 21 includes a housing body 21a, which is a metal box-shaped member with an open top and front and rear openings, and a metal partition wall 21b that divides the internal space of the housing body 21a into a plurality of small spaces. a metal top end 21c that closes the upper surface of the housing body 21a; a duct mounting portion 21d that penetrates the top end 21c in the thickness direction and is mounted with a high-pressure bus duct (not shown); and a metal leg portion 21e attached to the lower surface of the housing body 21a and in contact with the ground surface G.
A high-voltage bus duct is constructed by covering the lower end of a conductor connected to a high-voltage line with an insulator, supporting the conductor, and enclosing it in a case made of iron or aluminum. By attaching the high-voltage bus duct to the duct attachment portion 21d, the upper end of the bus conductor 23 is electrically connected to the conductor of the high-voltage bus duct, and the bus conductor 23 is energized with a high-voltage alternating current from the high-voltage system.

The bus conductor 23 is made of a highly conductive metal band plate (a long plate with a rectangular cross section) such as copper, and is electrically insulated from the partition wall 21b by being supported by the insulator IS. . The width and thickness of the bus conductor 23 are determined according to the magnitude of the load current flowing through the bus conductor 23 . The bus conductor 23 is divided at the position of the circuit breaker 24 into a first portion 23A on the high voltage system side (upstream side) and a second portion 23B on the load side (downstream side).
The circuit breaker 24 is movable in the front-rear direction inside the housing 21, electrically connects the first portion 23A and the second portion 23B of the bus conductor 23 at the frontmost position, and connects at the rearmost position. The first portion 23A and the second portion 23B are separated and insulated.
The lightning arrester 25 includes a lightning arrester main body 25a and a lightning arrester connection line 25b that electrically connects the bus conductor 23 and the lightning arrester main body 25a. The lightning arrester 25 protects each device included in the high-voltage power receiving equipment 20 by releasing a transient high voltage generated in the bus conductor 23 by, for example, a lightning strike into the ground.

The transformer 26 includes a transformer main body 26a that converts a high-voltage alternating current received from a primary-side terminal 26b into a low-voltage alternating current and outputs it from a secondary-side terminal 26c, a bus conductor 23, and a primary-side terminal 26b of the transformer main body 26a. It has a transformer connection conductor 26d for electrical connection and a low-voltage power cable 26e electrically connected to the secondary side terminal 26c of the transformer main body 26a.
The transformer connection conductor 26d is made of a highly conductive metal band plate such as copper, like the bus conductor 23. As shown in FIG. Instead of the transformer connection conductor 26d, the bus conductor 23 and the primary side terminal 26b of the transformer main body 26a may be electrically connected by an insulated wire.
The low-voltage power cable 26e is connected to a wiring circuit breaker (not shown) housed inside the housing, and the low-voltage alternating current converted by the transformer main body 26a is output to the outside via the wiring circuit breaker or the like. (wired).

A high-voltage conductor through which a high-voltage alternating current flows on the load side (downstream side) of the circuit breaker 24, such as the second portion 23B of the bus conductor 23, the insulation coated wire 27 branched from the second portion 23B, and the transformer connection conductor 26d. A disconnecting switch 29 shown in FIG.
The disconnecting switch 29 is a device that opens and closes a high-voltage conductor (electric circuit) to which no current flows due to the circuit breaker 24, and has a pair of terminals 29a connected to the high-voltage conductor and a rotating shaft 29c between the pair of terminals 29a. A blade 29b that is rotatably attached to the center and opens and closes between a pair of terminals 29a by rotation, a ring portion 29d provided on the blade 29b and used when rotating the blade 29b, and a pair of terminals. It has an insulating portion 29e to which 29a is attached to the tip, and a base 29f that supports the base end of the insulating portion 29e.

The blade 29b is rotated by an insulation operating rod 30 (disconnection rod) shown in FIG. 2(c). The insulating operating rod 30 has a cylindrical body portion 31 and a tip portion 32 attached to the tip of the body portion 31. On the side surface of the tip portion 32, a round bar-shaped locking portion 32a is provided. It protrudes to the side. A locking ring 32b having a diameter one size larger than that of the locking portion 32a is attached to the tip of the locking portion 32a.
As shown in FIG. 2(b), when rotating the blade 29b, the tip of the insulation operation rod 30 is moved after the locking portion 32a of the insulation operation rod 30 is inserted into the ring portion 29d. Thereby, the opening/closing operation of the disconnecting switch 29 can be performed from a safe place sufficiently away from the disconnecting switch 29 .

<Regarding work for attaching the status display device 1 to the bus conductor 23>
Next, the operation of attaching the status display device 1 to the bus conductor 23 will be described.
FIG. 3 is a diagram for explaining the operation of locking the locking portion 32a of the insulation operating rod 30 to the locked portion 6, and FIG. FIG. 5(a) is a diagram showing the insulation fixing portion 2a spread by the bus conductor 23, and FIG. 5(b) is a diagram showing the state display device 1 attached to the bus conductor 23. .
As shown in FIG. 3, when the status display device 1 is attached to the bus conductor 23, the locking portion 32a of the insulation operating rod 30 is first locked to the locked portion 6 of the status display device 1. As shown in FIG. Specifically, the locking portion 32 a is inserted into the through hole 6 a of the locked portion 6 . The state display device 1 is hooked to the tip of the insulating operation rod 30 by locking the locking portion 32 a to the locked portion 6 .

Next, as shown in FIG. 4 , the state display device 1 hooked on the insulation operating rod 30 is brought close to the bus conductor 23 . At this time, the claw portion 2c provided in the housing 2 is opposed to the side surface (narrow side) of the bus conductor 23, and the state display device 1 is brought close to the bus conductor 23. As shown in FIG. When the state display device 1 is pushed toward the bus conductor 23 by the insulation operating rod 30 from the state where the claw portion 2c is in contact with the bus conductor 23, the clamping member 2b is pushed outward by the bus conductor 23 as shown in FIG. 5(a). 5(b), the claw portion 2c engages the edge of the bus conductor 23 to hold the status display device 1 so as not to come off the bus conductor 23. As shown in FIG. After the state display device 1 is pushed in, the locking portion 32a of the insulating operation rod 30 is pulled out from the locked portion 6, whereby the attachment of the state display device 1 to the bus conductor 23 is completed.
As described above, in this embodiment, when the status display device 1 is attached to the bus conductor 23, the insulating operating rod 30 is operated while the locking portion 32a of the insulating operating rod 30 is locked to the locked portion 6. Since it is sufficient to fix the insulating fixing portion 2 a to the bus conductor 23 , the status display device 1 can be attached to the bus conductor 23 from a safe place sufficiently away from the bus conductor 23 . Therefore, the status display device 1 can be attached without causing a power failure of the high-voltage power receiving equipment 20 .

<About Modifications>
The state display device 1 shown in FIG. 1 was attached to the narrow side surface of the bus conductor 23 having a rectangular cross section. You may make it attach to the side surface of the wide side in the bus-line conductor 23. FIG.
Also, as in the state display device 1B shown in FIGS. 7A and 7B, it may be attached to an insulated wire 27 (KIP wire) having a circular cross section. The insulation-coated electric wire 27 includes a conductor 27a having a circular cross section and made of annealed copper wire, and an insulation coating 27b made of an electrically insulating material such as synthetic rubber and covering the outer peripheral surface of the conductor 27a. Since the insulated wire 27 has a circular cross section, the insulating fixing portion 2a′ provided in the housing 2 is provided at the clamping member 2b′ curved to follow the shape of the insulated coated wire 27 and at the tip of the clamping member 2b′. and a claw portion 2c'. Further, the current collecting portion 3′ (electromotive conductor 3a′) provided inside the holding member 2b′ is also curved following the shape of the insulation-coated electric wire 27. As shown in FIG.
7 is different from the state display device 1 shown in FIG. The orientation of the locked portion 6' (through hole 6a') may be determined according to the high-voltage conductor to be attached.

In the status display device 1 shown in FIG. 1, the display unit 4 includes the light-emitting diode 4a that emits light when the bus conductor 23 is energized with a high-voltage alternating current. A separate display that emits light may be provided. FIG. 8(a) is a block diagram for explaining the drive circuit 10A of the modified example, FIG. 8(b) is a diagram for explaining the operation when the light emitting diode 4a of the display section 4 is operating normally, and FIG. 8(c). ) is a diagram for explaining the operation when the current from the rectifying section 12 stops flowing to the light emitting diode 4a of the display section 4. FIG.
In the drive circuit 10 shown in FIG. 8(a), a failure display section 13 (light emitting diode 13a and resistor 13b) is connected in parallel with the display section 4 (light emitting diode 4a). In this modification, the fault display section 13 forms a closed circuit with the electromotive conductor 3a, the electricity storage section 11, and the rectifying section 12, and the light emitting diode 13a of the fault display section 13 is the light emission of the display section 4. It emits light in a color different from that of the diode 4a. For example, the display unit 4 uses a light-emitting diode 4a that emits red light, and the failure display unit 13 uses a light-emitting diode 13a that emits blue light.

In this drive circuit 10, the current flow from the rectifying section 12 is restricted by the resistor 13b. For example, as shown in FIG. 8B, when the light emitting diode 4a of the display section 4 is normal, the current I1 from the rectifying section 12 flows through the light emitting diode 4a of the display section 4. FIG. As a result, the light-emitting diode 4a of the display section 4 emits light, and the light-emitting diode 13a of the failure display section 13 does not emit light (or emits dim light). On the other hand, as shown in FIG. 8C, when the current from the rectifier 12 does not flow to the light emitting diode 4a of the display 4, the current I2 from the rectifier 12 flows to the light emitting diode 13a of the failure display 13. , the light emitting diode 13a emits light.
Therefore, even if the light-emitting diode 4a of the display unit 4 fails, the light-emitting diode 13a of the failure display unit 13 emits light. The operator can be informed that

<About other modifications>
In the above-described embodiment, the high-voltage power receiving equipment 20 is of a cubicle type having a transformer 26, but the status display device 1 according to the present invention can also be applied to high-voltage power receiving equipment that does not have a transformer 26. can be used.
In the above-described embodiment, the drive circuit 10 includes the power storage unit 11 (capacitor 11a). 11 can also be omitted.
In the above-described embodiment, the electromotive conductor 3a of the current collecting portion 3 is provided on the clamping member 2b of the insulating fixing portion 2a. The electromotive conductor 3a may be provided at a different location as long as it can be placed in the inside.

[Summary of Embodiments, Actions, and Effects of the Present Invention]
<First embodiment>
The high-voltage conductor status display device 1 according to this aspect is provided in a high-voltage power receiving equipment 20 in which a high-voltage conductor (bus conductor 23, insulation coated wire 27) to which high-voltage alternating current received from a high-voltage system is energized is housed inside a housing 21. It is used to indicate that a high-voltage alternating current is energized to the high-voltage conductor, and has an insulating fixing portion 2a made of an electrical insulator fixed to the high-voltage conductor, and the insulating fixing portion 2a is fixed to the high-voltage conductor. Sometimes, based on the potential difference generated in the electromotive conductor 3a placed in the electromagnetic field generated by passing high voltage alternating current through the high voltage conductor and the electromotive conductor 3a due to the change in the magnetic flux in the electromagnetic field, one direction A closed circuit is formed between the rectifying section 12, which supplies the current I to the rectifying section 12, the electromotive conductor 3a, and the rectifying section 12, and operates based on the current I from the rectifying section 12. a display portion 4 for displaying that the insulating fixing portion 2a is fixed to a high-voltage conductor; characterized by having
In this embodiment, the closed circuit formed by the electromotive conductor 3a, the rectifying section 12, and the display section 4 can operate without being grounded. Therefore, the status display device 1 according to this aspect can be easily miniaturized and can be installed even in a narrow empty space inside the housing. Furthermore, the operation of attaching the status display device 1 to the bus conductor 23 can be performed from a safe place sufficiently away from the high-voltage conductor using the insulating operating rod 30 . Therefore, the status display device 1 can be attached without causing a power failure of the high-voltage power receiving equipment 20 .

<Second embodiment>
In the state display device 1 according to this aspect, the insulating fixing portion 2a is made of a flexible and electrically insulating synthetic resin, and includes a pair of holding members 2b that hold and fix the high-voltage conductor. The conductor 3a is characterized in that it is arranged on the clamping member 2b.
According to the state display device 1 according to this aspect, the electromotive conductor 3a can be placed in the electromagnetic field by fixing the insulating fixing portion 2a to the high-voltage conductor.

<Third embodiment>
In the state display device 1 according to this aspect, a closed circuit is formed between the electromotive conductor 3a and the rectifying section 12, and when the display section 4 cannot display based on the current from the rectifying section 12, the current It is characterized by having another display section (failure display section 13) which operates based on the voltage and displays that a high voltage alternating current is energized to the high voltage conductor.
According to the state display device 1 according to this aspect, even if the display section 4 cannot display that the high voltage conductor is energized with the high voltage alternating current, it can be displayed by another display section.

<Fourth embodiment>
The status display device 1 according to this aspect is characterized by having a temperature indicating portion (temperature indicating sticker 5) that changes color when the temperature reaches a predetermined temperature or higher.
According to the state display device 1 according to this aspect, it is possible to recognize that the high-voltage conductor is energized with the high-voltage alternating current, based on the color change of the temperature indicator.

<Fifth embodiment>
The state display device 1 according to this aspect is characterized in that the high-voltage power receiving equipment includes a disconnecting switch 29 that is opened and closed by an insulating operating rod 30 .
According to the state display device 1 according to this aspect, the state display device 1 can be attached to the insulating operation rod 30 for opening and closing the disconnecting switch 29 provided in the high-voltage power receiving equipment, so usability is improved.

DESCRIPTION OF SYMBOLS 1, 1A, 1B... Status display device 2... Housing 2a... Insulating fixing part 2b... Sanding member 3... Current collecting part 3a... Electromotive conductor 4... Display part 4a... Light emitting diode 5... Temperature indicating seal 6 Locked portion 6a Through hole 10 Drive circuit 11 Power storage unit 11a Capacitor 12 Rectifying unit 12a Rectifying diode 13 Failure display unit 13a Light emitting diode , 13b... Resistor 20... Cubicle type high voltage power receiving equipment 21... Case 23... Bus conductor 23A... First part of bus conductor 23B... Second part of bus conductor 24... Disconnector 25... Lightning arrester 26 Transformer 27 Insulated wire (KIP wire) 29 Disconnector 29b Blade 29c Rotating shaft 29e Ring portion 30 Insulated operating rod 31 Body portion 32 Tip portion 32a... Locking portion, I... Current after rectification

Claims (5)

A high-voltage conductor status display device that is used in a high-voltage power receiving facility in which a high-voltage conductor through which a high-voltage alternating current received from a high-voltage system is energized is housed inside a housing, and displays that the high-voltage conductor is energized with the high-voltage alternating current. There is
an insulating fixing portion made of an electrical insulator fixed to the high-voltage conductor;
When the insulating fixing part is fixed to the high-voltage conductor, it is placed in an electromagnetic field generated by passing the high-voltage alternating current through the high-voltage conductor. an electrical conductor;
a capacitor forming an LC circuit together with the electromotive conductor;
a rectifying unit for flowing a current in one direction based on the potential difference generated in the electromotive conductor;
A closed circuit is formed between the electromotive conductor, the capacitor, and the rectifying section, and is operated based on the current from the rectifying section to indicate that the high voltage conductor is supplied with the high voltage alternating current. a display unit for
a locked portion to which a locking portion provided on an insulating operation rod is detachably locked when the insulating fixing portion is fixed to the high-voltage conductor;
has
The high-voltage conductor status display device , wherein the LC circuit resonates when the high-voltage alternating current is passed through the high-voltage conductor . The insulating fixing part is made of a flexible and electrically insulating synthetic resin, and includes a pair of holding members that hold and fix the high-voltage conductor,
2. The high-voltage conductor state display device according to claim 1, wherein the electromotive conductor is disposed on the clamping member. A closed circuit is formed between the electromotive conductor, the capacitor, and the rectifying section, and when the display section cannot display based on the current from the rectifying section, the high voltage conductor is connected to the high voltage conductor based on the current. 3. The high-voltage conductor status display device according to claim 1, further comprising another display unit for displaying that the high-voltage alternating current is being supplied. 4. The high-voltage conductor status display device according to claim 1, further comprising a temperature indicator that changes color when the temperature reaches a predetermined temperature or higher. 5. The high-voltage conductor status display device according to claim 1, wherein the high-voltage power receiving equipment includes a disconnecting switch that is opened and closed by the insulating operating rod.

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