JP2009004489A - Simulation device for proximity accident with other-objects - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simulation device for proximity accident with other-objects that can ensure the safety of an operator of the other-object proximity accident simulation device and visitors who are observing a simulation experiment, even if high and low voltage contact is made between a low-voltage winding and a special high-voltage winding and can improve the safeties, as compared with a conventional transformer with a contact preventing plate. <P>SOLUTION: The simulation device for proximity accident with other-object 100 uses a transformer 10, having a primary winding 3 composed of the low-voltage winding wound around a grounded iron core 2 as an innermost layer, a secondary winding 5 composed of the special high-voltage winding wound around the iron core 2 as an outermost layer, and the grounded contact prevention plate 6 interposed between the layers of the primary winding 3 and secondary winding 5, and the transformer 10 has a tertiary winding 4 composed of a low-voltage winding wound around the iron core 2 as an intermediate layer between the layers of the primary winding 3 and contact prevention plate 6, the second winding 5 and tertiary winding 4 being grounded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an object proximity simulation apparatus using a transformer capable of boosting a voltage of 600 volts or less (hereinafter referred to as a low voltage) to a voltage exceeding 7000 volts (hereinafter referred to as a special high voltage). In particular, an experimental electric wire (hereinafter referred to as a simulated aerial transport facility) suspended in the air with a support is used as a simulated live line, and the crane, a tree, etc. ( The present invention relates to another object proximity accident simulation apparatus that can generate arc discharge between the other object).

Accidents in which other objects come into contact with the transportation equipment that transports electricity from the power plant to the customer are ground faults due to damage to the transportation equipment due to arc discharge and a ground fault current flowing to the ground.
When a ground fault occurs, many customers will be out of power for a long time, and there is a risk of electric shock to the general public working near other objects. For example, a related worker who is operating a crane or a forest worker who is cutting a tree may have an electric shock.

  By reproducing simulations of ground faults caused by other objects and observing the occurrence of arc discharges in close proximity (hereinafter referred to as other-object proximity accident simulation experiments), There are attempts to experience and educate the general public about the prevention of accidents in the vicinity of other objects, and to use it for training in basic operations in workers who handle electricity.

  As a device used for this other object proximity accident simulation experiment, while ensuring the safety of operators and visitors of the experimental device, simulation using a transformer that can easily boost the voltage from a low-voltage commercial power source to an extra high voltage The development of experimental equipment was desired.

On the other hand, although it is not a simulation experiment device, as a transformer that couples a high voltage or extra high voltage and a low piezoelectric circuit, abnormal voltage entering from the high voltage side electric circuit may cause damage to electric equipment, electric shock, fire, etc. Therefore, a transformer with an incompatibility prevention plate is used (see, for example, Non-Patent Document 1).
Osamu Ando, “Transformers with anti-contact plates”, [online], Japan Electrical Engineers Association [searched on May 10, 2007], Internet <URL: http://www.radionikkei.jp/denki /contents/07202/index.html>

  When applying a conventional transformer with an anti-mixing plate to a device for simulating an accident in a special high-voltage electric wire (hereinafter referred to as another object accident simulation device), a low-voltage winding and a special high-voltage winding However, if the anti-contact plate is insufficiently grounded, special contact will occur if there is a contact failure due to insulation breakdown between the low-voltage winding and the special high-voltage winding. High voltage spreads to the low voltage winding side and converts the high voltage transmitted from a distant power plant to the low voltage used in homes and offices. A current with an extra high voltage flows up to the Class B grounding point. For this reason, there has been a problem that the safety of operators of other object proximity accident simulators and visitors observing simulation experiments may be hindered.

  The present invention has been made to solve the above-described problems. Even when high-low pressure contact occurs between the low-voltage winding and the special high-voltage winding, this other object proximity accident simulator The safety of other operators and visitors observing simulation experiments can be ensured, and compared with conventional transformers with anti-intrusion plates, we have provided a proximity proximity simulator that improves safety. To do.

  In the other object proximity accident simulation apparatus according to the present invention, a primary winding composed of a low-voltage winding wound on the innermost layer with respect to a grounded iron core, wound on the outermost layer with respect to the iron core. A transformer comprising a secondary winding composed of a special high-voltage winding and a grounded anti-contact plate interposed between layers of the primary winding and the secondary winding. A third-order winding comprising a low-voltage winding wound as an intermediate layer with respect to the iron core between the primary winding and the anti-contact plate, and the secondary winding and the third winding are It is grounded.

  Further, in the other object proximity accident simulation device according to the present invention, if necessary, the transformer is connected in series between the primary winding and a power supply unit that applies a low voltage to the primary winding, and the voltage is reduced by arc discharge. A limiting resistor that limits a short-circuit current flowing on the primary side of the capacitor to a predetermined current value, and an allowable power of the limiting resistor is smaller than an allowable power of the secondary winding.

  In the other object proximity accident simulation device according to the present invention, the reactive power compensation capacitor connected to the tertiary winding is provided as necessary, and the reactive power compensation capacitor flows to the primary side of the transformer. It is a phase advance capacitor that cancels out the reactive current component of the short circuit current.

  Moreover, in the other object proximity accident simulation device according to the present invention, if necessary, an other object discharge dynamometer connected in parallel to the limiting resistor is provided, and the other object discharge dynamometer flows through the limiting resistor. Based on the current value of the short-circuit current, the occurrence of arc discharge is sensed, the number of arc discharges is added and stored for each occurrence of arc discharge, and the frequency of arc discharge is displayed.

  In the other object proximity accident simulation apparatus according to the present invention, a primary winding composed of a low-voltage winding wound on the innermost layer with respect to a grounded iron core, wound on the outermost layer with respect to the iron core. A transformer comprising a secondary winding composed of a special high-voltage winding and a grounded anti-contact plate interposed between layers of the primary winding and the secondary winding. A third-order winding comprising a low-voltage winding wound as an intermediate layer with respect to the iron core between the primary winding and the anti-contact plate, and the secondary winding and the third winding are Even when contact between adjacent layers occurs due to grounding, the grounded tertiary winding and the contact prevention plate function as a breakwater that blocks the extra high voltage that spreads from the secondary side to the primary side. As a result, the extra high voltage does not spread to the primary winding.

  Further, in the other object proximity accident simulation device according to the present invention, if necessary, the transformer is connected in series between the primary winding and a power supply unit that applies a low voltage to the primary winding, and the voltage is reduced by arc discharge. A limiting resistor for limiting the short-circuit current flowing on the primary side of the capacitor to a predetermined current value, and the allowable power of the limiting resistor is smaller than the allowable power of the secondary winding, so that the rated current is 15A Even when power is supplied from a 100V outlet, it is possible to carry out another object proximity accident simulation experiment, and heat up the limiting resistor before the secondary winding is blown by the short circuit current of the other object proximity accident simulator. By doing so, disconnection of the secondary winding can be prevented.

  In the other object proximity accident simulation device according to the present invention, the reactive power compensation capacitor connected to the tertiary winding is provided as necessary, and the reactive power compensation capacitor flows to the primary side of the transformer. The phase-advanced capacitor that cancels out the reactive current component of the short-circuit current cancels out the reactive current component of the short-circuit current flowing through the portable generator even when power is supplied from a small-power experimental power source such as a portable generator. By correcting the loss due to the primary winding, it is possible to generate arc discharge in another object proximity accident simulation experiment.

  Moreover, in the other object proximity accident simulation device according to the present invention, if necessary, an other object discharge dynamometer connected in parallel to the limiting resistor is provided, and the other object discharge dynamometer flows through the limiting resistor. Based on the current value of the short-circuit current, the occurrence of arc discharge is sensed, and the number of arc discharges is added and stored for each occurrence of arc discharge. In order to prevent accidents such as defective insulation and winding fusing, the operator and tours can be performed Can ensure further safety and security of the person.

(First embodiment of the present invention)
FIG. 1 (a) is an explanatory diagram for explaining a schematic configuration of another object proximity accident simulation apparatus in the first embodiment for carrying out the present invention, and FIG. 1 (b) is another diagram shown in FIG. 1 (a). FIG. 2 is a sectional view showing a schematic configuration of the transformer shown in FIG. 1. FIG. 2 is a circuit diagram showing a wiring state of the object proximity accident simulator.

  The transformer 10 includes a primary winding 3 composed of a low-voltage winding wound on the innermost layer with respect to the iron core 2 and a low-voltage winding wound as an intermediate layer inside the housing 1. Conductivity such as a copper winding interposed between the tertiary winding 4, the secondary winding 5 consisting of a special high voltage winding wound on the outermost layer, and the tertiary winding 4 and the secondary winding 5. And an incompatibility preventive plate 6.

  The casing 1 is provided with an extra high voltage generating terminal 1a for applying extra high voltage to a simulated aerial transport facility (not shown) for connecting the tertiary winding 4 to a ground point via a ground wire (not shown). The first grounding terminal 1b and the second grounding terminal 1c for connecting the secondary winding 5, the anti-contact plate 6 and the housing 1 are disposed at the bottom.

  The iron core 2 is preferably made of a directional steel plate that has a low iron loss, a high saturation magnetic flux density and a high magnetic permeability, and is easy to be magnetized in a specific direction. A silicon steel plate is used. The iron core 2 is grounded via the housing 1.

The primary winding 3, the tertiary winding 4 and the secondary winding 5 use an annealed copper wire having an insulation coating as a winding, and are designed with one turn per volt.
In the first embodiment, the primary winding 3 is an electric wire having a cross-sectional area of 2 mm ² , and is applied to the iron core 2 in order to apply a primary voltage of 100 volts to the primary winding 3 from a commercial power source. 100 rolls.

The tertiary winding 4 is an electric wire having a cross-sectional area of 2 mm ² and is wound around the iron core 2 with 100 turns. In the first embodiment, since the number of turns of the primary winding 3 and the number of turns of the tertiary winding 4 are matched, a tertiary voltage is applied to the primary voltage of 100 volts applied to the primary winding 3. The winding 4 outputs a tertiary voltage of 100 volts, but is not limited to the number of turns of the tertiary winding 4.

  However, as a reactive power compensation capacitor 22 to be connected to the tertiary winding 4 to be described later, in order to use a capacitor having a withstand voltage of 200 V, which is an inexpensive product among the compensation capacitors, the tertiary side is 200 V or less. A tertiary voltage is preferable, and a tertiary voltage of 100 V or less, which is half or less of the breakdown voltage of the reactive power compensation capacitor 22, is more preferable. In particular, since the impedance of the winding changes in proportion to the square of the number of turns, it is possible to match the number of turns of the primary winding 3 and the number of turns of the tertiary winding 4 to the circuit design of the proximity proximity simulator 100. Is preferable because it can be made easier. The secondary winding 5 is grounded by connecting one terminal to the extra high voltage generating terminal 1a and the other terminal to the first ground terminal 1b.

The secondary winding 5 is a very thin electric wire having a cross-sectional area of 0.09 mm ² , and can output 50,000 volts to the secondary side as an extra high voltage used for another object proximity accident simulation experiment. Although it is wound with 50,000 windings, in order to reduce the manufacturing cost of the transformer 10, a method of stage insulation is adopted in which the winding is divided into a plurality of parts and connected in series and stepped up stepwise. . In the first embodiment, 50,000 windings are divided into four parts and wound around the iron core 2 at 15,000 windings per winding. Further, the secondary winding 5 is connected to the second ground terminal 1 c together with the contact prevention plate 6 and the housing 1 to be grounded.

  The insulating paper 7 is paper-like that insulates the layers, and is disposed between the layers of the iron core 2, the primary winding 3, the tertiary winding 4, the anti-contact plate 6, and the secondary winding 5. In addition, since the secondary winding 5 is wound in multiple layers and includes a plurality of layers, insulating paper 7 is also disposed between the layers of the secondary winding 5.

  The pole transformer 200 is subjected to class B grounding (class B grounding point 200a) at one terminal on the low voltage side, and applies high voltage (mainly 6,600 volts) applied to the high voltage distribution line. The voltage is stepped down to a low voltage (100 volts or 200 volts) used at home or office and supplied as commercial power.

  The transformer 10 applies a primary voltage of 100 volts supplied from the commercial power source to the primary winding 3 by connecting to the commercial power source using an unillustrated wiring connector (plug, plug receptacle). Then, a secondary voltage of 50,000 volts is output to the secondary winding 5.

  Thereby, the transformer 10 applies a voltage of 50,000 volts to the simulated aerial transport facility by abutting the special high voltage generating terminal 1a connected to one terminal of the secondary winding 5 to the simulated aerial transport facility. Overhead transportation facilities can be live.

  In addition, since the transformer 10 has a layer formed by the anti-mixing plate 6 and the tertiary winding 4 between the layers of the secondary winding 5 and the primary winding 3, the mixing occurs between the adjacent layers. Even in this case, the grounded tertiary winding 4 and the anti-contact plate 6 each serve as a breakwater that blocks the extra high voltage that spreads from the secondary side to the primary side. It is a double protection mechanism that does not spill over.

  It is also possible to add a grounded anti-contact plate 6 between the tertiary winding 4 and the primary winding 3, but the primary winding 3 and the tertiary winding 4 have a low voltage (100 volts). ), The remarkable effect of preventing contact is not expected so much, and the weight of the transformer 10 is increased by the weight of the added contact prevention plate 6, so that the secondary winding 5 It is preferable to interpose the anti-contact plate 6 only between the coil and the tertiary winding 4.

Further, the transformer 10 connects the first ground terminal 1b and the second ground terminal 1c to a ground point via a ground wire (not shown) before applying a primary voltage to the primary winding 3, respectively. For example, when the transformer 10 is used outdoors, a grounding rod connected to the first grounding terminal 1b and the second grounding terminal 1c via a grounding wire having a cross-sectional area of 2.6 mm ² or more is grounded. Can be placed and grounded.

  Here, when the connection between the grounding point where the grounding rod comes off from the ground and the first grounding terminal 1b or the second grounding terminal 1c is insufficient, the tertiary winding 4, the secondary winding 5, and the mixed contact If the wire connecting the prevention plate 6 and the grounding point and the winding of the tertiary winding 4 or the secondary winding 5 are disconnected or damaged, there is a possibility that the frequency is rare. In particular, it is not easy to confirm the disconnection or damaged part of the winding in the conventional transformer with an incompatibility prevention plate, and the primary voltage 3 is applied to the primary winding 3 without confirming the disconnection or damaged part of the winding. Thus, 50,000 volts were applied to the disconnected portion, and there was a risk of shifting from that portion to high-low pressure contact.

  Therefore, in the other object proximity accident simulation device 100 according to the first embodiment, before applying the primary voltage to the primary winding 3, the first ground wire connecting the first ground terminal 1b and the ground point is used. In addition, a resistance measurement range tester can be connected between the second ground line connecting the second ground terminal 1c and the ground point to check 2000 ohms or less, and the connection of the ground point can be checked.

Next, the reason why the secondary voltage of the transformer 10 is set to 50,000 volts will be described.
Discharge is a phenomenon in which a current flows when a high voltage is applied between two electrodes sandwiching an insulator.In particular, arc discharge emits strong arc-shaped light and high heat, and is the most discharge in gas. This is a phenomenon in which the current density is large and the voltage drop is small.
In order to generate this arc discharge in a simulated manner, a gas discharge can be generated by applying a voltage of 1000 volts per mm to the interval between the two electrodes.

  That is, when the other object to be the other electrode is gradually brought closer to the simulated aerial transport equipment from the distance to the simulated aerial transport equipment to which 50,000 volts as one electrode is applied via the air as an insulator, Only after the distance between the transport facility and the other object reaches 5 cm, arc discharge is generated between the simulated overhead transport facility and the other object. When arc discharge begins to occur, the air between the simulated overhead transportation facility and the other object is ionized and is no longer an insulator, and the arc discharge continues even if the voltage decreases due to the limiting resistance.

  Similarly, if 20,000 volts is applied to the simulated aerial transport facility, the distance between the simulated aerial transport facility and other objects will reach 2 cm, Arc discharge will occur. In addition, if 100,000 volts is applied to the simulated aerial transport facility, when the distance between the simulated aerial transport facility and another object reaches 10 cm, an arc discharge occurs between the simulated aerial transport facility and the other object. Will do.

  Therefore, in this first embodiment, since a visitor of another object proximity accident simulation experiment can visually recognize the arc discharge and experience the occurrence of a powerful arc discharge, 5 cm is selected. The secondary voltage of the transformer 10 was set to 50,000 volts so that a secondary voltage of 10,000 volts was applied to the simulated overhead transportation facility.

  The secondary voltage is not limited to 50,000 volts as long as arc discharge can be generated between the simulated aerial transport facility and other objects. It is preferable to set appropriately according to the above.

(Second embodiment of the present invention)
FIG. 3 is a circuit diagram showing a wiring state of an object proximity accident simulator in the second embodiment for carrying out the present invention. 3, the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding parts, and the description thereof is omitted.
In the second embodiment, as the other object proximity accident simulation device 100, the only difference from the first embodiment is that the limiting resistor 21 is connected in series between the primary winding 3 and the commercial power source. Except for the operational effects of the limiting resistor 21 described later, the same operational effects as the first embodiment are achieved.

  In this second embodiment, when power is supplied from a commercial power supply to the other object proximity accident simulator 100, a general household 100V outlet (JIS C) is used as a plug receptacle for a wiring plug connector (not shown). 8303 Two-pole outlet 15A125V) to supply power.

  In this case, as described above, if the other object proximity accident simulation apparatus 100 in the first embodiment is configured only by the transformer 10, an arc discharge is generated between the simulated overhead transportation facility and the other object. When a ground fault current flows, the primary circuit having the primary winding 3 as a circuit element is short-circuited with 52.3 to j23.4 [A] in vector expression and 57.3 to 24.1 in polar expression. Current will flow.

  As described above, when a short-circuit current of 57.3 A flows through the primary circuit, the other object proximity accident simulation experiment is performed using the other object proximity accident simulation apparatus 100 at a household 100 V outlet having a rated current of 15 A. I can't.

  Therefore, in the second embodiment, the limiting resistor 21 is connected in series between the primary winding 3 and the commercial power source, thereby limiting the short-circuit current flowing in the primary circuit to a predetermined current value, and Even when power is supplied from a 100 V outlet, the other object proximity accident simulation apparatus 100 can be used.

  The limiting resistor 21 is an impedance of a resistance component or a reactance component in the circuit configuration of the other object proximity accident simulation device 100, a short circuit current flowing in the primary circuit, a characteristic or circuit constant of the transformer 10, an arc discharge location, and a connection through another object. This is calculated in consideration of the arc resistance 300 between the points and the primary voltage for obtaining the secondary voltage necessary for arc discharge.

  In the second embodiment, by using a resistance of 2.5Ω as the limiting resistor 21, the short-circuit current flowing through the primary circuit is expressed by 23.7-j4.1 [A] in a vector expression and polar coordinates expression. Therefore, it was possible to limit to 24.1∠9.9. As a result, the short-circuit current flowing in the primary circuit can be limited to less than twice the rated current of a household 100V outlet, and if it is within the discharge time of the arc discharge (energization time 1 second) in another object proximity accident simulation experiment Even when electric power is supplied from a household 100V outlet, the other object proximity accident simulation apparatus 100 can be used.

In particular, by selecting the limiting resistor 21 having an allowable power smaller than the allowable power of the secondary winding 5, the limiting resistor 21 is blown before the secondary winding 5 is blown by the short-circuit current of the other object proximity accident simulator 100. By generating heat, it is possible to prevent disconnection of the secondary winding.
In the second embodiment, as the secondary winding 5, a very thin electric wire having a cross-sectional area of 0.09 mm ² is used, and the allowable power is 1000 W. Therefore, the limiting resistor 21 with the allowable power of 250 W is used. By using, it is possible to take measures against short-circuit current protection for the secondary winding 5.

(Third embodiment of the present invention)
FIG. 4 is a circuit diagram showing a wiring state of an object proximity accident simulation apparatus in a third embodiment for carrying out the present invention. 4, the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts, and the description thereof is omitted.
This third embodiment differs from the second embodiment only in that a reactive power compensation capacitor 22 is connected to the tertiary winding 4 to form a tertiary circuit as the other object proximity accident simulation device 100, which will be described later. Except for the operational effects of the reactive power compensation capacitor 22, the same operational effects as in the first and second embodiments are achieved.

In the third embodiment, a case is considered in which power is supplied to the other object proximity accident simulation apparatus 100 from a small output experimental power source such as the portable generator 400.
In the configuration of the other object proximity accident simulation device 100 in the second embodiment described above, the load power is 2370 [W], and therefore, for example, 650 [W] is generated as the portable generator 400. If a portable generator (0.254Ω internal resistance 400a, 5.137Ω internal reactance 400b) is used, it is impossible to generate arc discharge in another object proximity accident simulation experiment.

  Therefore, in the third embodiment, the reactive power compensation capacitor 22 is connected to the tertiary winding 4 to form a tertiary circuit, thereby canceling out the reactive current component of the short-circuit current flowing through the primary circuit. By correcting the loss, it is possible to generate an arc discharge in another object proximity accident simulation experiment.

  The reactive power compensation capacitor 22 is a short circuit current flowing in the primary circuit (in this third embodiment, 8.3-j11.0 [A] in vector representation, 13.8∠53.0 in polar representation). The phase advance capacitor cancels out the reactive current (in the third embodiment, -j11.0 [A]).

  Even if a portable generator requiring 1380 [VA], which is 210% load power in a portable generator having an electric power of 650 [W], is used by this reactive power compensation, an overload of about 127% It is possible to generate an arc discharge in a simulation experiment for another object proximity accident.

(Fourth embodiment of the present invention)
FIG. 5 is a circuit diagram showing a wiring state of another object proximity accident simulation apparatus in the fourth embodiment for carrying out the present invention. 5, the same reference numerals as those in FIGS. 1 to 4 denote the same or corresponding parts, and the description thereof is omitted.
The fourth embodiment is different from the third embodiment only in that the other object proximity accident simulation apparatus 100 is further provided with the other object proximity detector 12a and the other object discharge frequency meter 24. Except for the functions and effects of the object proximity detector 12a and the other-object discharge meter 24, the same functions and effects as those of the first to third embodiments are achieved.

  The other object proximity detector 12a is connected in parallel with the primary winding 3 in the primary circuit, the other object approaches the simulated overhead transportation facility, and an arc discharge is generated between the simulated overhead transportation facility and the other object. , And the application of the input voltage to the primary winding 3 is stopped after a predetermined time from the start of the arc discharge by the other object proximity detector 23 described later.

  In the fourth embodiment, the predetermined time from the start to the end of the arc discharge is ensured to a certain extent for giving a force to the arc discharge, and the simulated aerial transport equipment and windings are provided. Although it was set to 1 second in comparison with securing a certain short time to prevent fusing, it is not limited to this time, and the operator of the other object proximity accident simulation apparatus 100 sets appropriately. May be.

  The other object discharge frequency meter 24 is connected in parallel with the limiting resistor 21 in the primary circuit, and when another object approaches the simulated overhead transportation facility and an arc discharge occurs between the simulated overhead transportation facility and the other object, A current flows through the resistor 21. Then, by generating the terminal voltage, the other object discharge frequency meter 24 connected in parallel with the limiting resistor 21 senses, and adds and stores the number of arc discharges every time arc discharge occurs, Displays the arc discharge frequency. For example, “small total counter type H7EC-NFV” manufactured by OMRON Corporation can be used as the other-object discharge frequency meter 24.

  Here, the transformer generally used as an insulation withstand voltage tester is used at 1% or less of the rated current. Compared to such a transformer, the transformer 10 of the other object proximity accident simulation device 100 is used for an abnormal application in which arc current is generated in a simulated manner in which 240% of the rated current flows. It is conceivable that the deterioration of the winding becomes remarkable.

  Therefore, in the fourth embodiment, by arranging the other object discharge frequency meter 24 in the other object proximity accident simulation apparatus 100, the arc discharge from the start of operation of the other object proximity accident simulation apparatus 100 to the present time. The frequency can be grasped, and the durability of the winding of the transformer 10 can be easily managed.

For example, as the operation rule of the other object proximity accident simulation apparatus 100, the maximum number of experiments per day is set to 450 times, the occurrence of arc discharge is 2000 times in total, or the other object proximity accident simulation apparatus 100 is used for three years. It may be obliged to carry out an internal inspection of the other object proximity accident simulation device 100 when it arrives earlier.
Thereby, the damaged part in the coil | winding of the transformer 10 can be discovered at an early stage, and the fusing in the coil | winding of the transformer 10 can be prevented beforehand.

  In the fourth embodiment, a wind turbine type voltage detector may be attached to a cylindrical insulating material of about 30 cm disposed on the extra high voltage generating terminal 1a of the transformer 10. This wind turbine type voltage detector detects an electrostatic induction voltage due to a capacitance divided around the transformer 10 due to the occurrence of an extra high voltage of 50,000 volts on the secondary side of the transformer 10. Rotate the windmill. As a result, it is possible for an operator or a visitor of the foreign object proximity accident simulation apparatus 100 to visually confirm that the special high voltage of 50,000 volts is applied to the special high voltage generation terminal 1a of the transformer 10, and the proximity of other objects. Further safety in accident simulation experiments can be achieved.

  Hereinafter, a specific circuit arrangement of the object proximity accident simulator in the fourth embodiment described above will be described. FIG. 6 is a circuit diagram showing the wiring state of the other object accident simulation device in this embodiment, and FIG. 7 is a diagram for explaining the operational effect of the limit switch arranged in the control device of the other object simulation device shown in FIG. It is explanatory drawing. 6 and 7, the same reference numerals as those in FIGS. 1 to 5 denote the same or corresponding parts, and the description thereof is omitted.

  Another object proximity accident simulation device 100 includes connectors connected to the primary winding 3 and the tertiary winding 4 of the transformer 10 and two connectors arranged on the output side of the control device 20 via a connector cable. Connecting and using a power cord via the connector on the input side of the control device 20, a commercial power source or a small output experimental power source such as the portable generator 400 (hereinafter, the commercial power source and the experimental power source are collectively referred to as a power source unit). It is configured to connect to.

  In the control device 20, a reactive power compensation capacitor 22 is connected via a capacitor switch 25 to a connector side connected to the tertiary winding 4 among the output side connectors. The connection state with the reactive power compensation capacitor 22 is switched.

  As shown in the first and second embodiments, the condenser switch 25 is opened and closed when the reactive power compensation capacitor 22 is supplied to the other object proximity accident simulation apparatus 100 from the commercial power source. Since it is not necessary to dispose on the tertiary side of the transformer 10, the reactive power compensation capacitor 22 and the tertiary winding 4 are disconnected by the capacitor switch 25. Further, as shown in the third embodiment, when power is supplied from the experimental power source to the other object proximity accident simulation apparatus 100, it is necessary to dispose the reactive power compensation capacitor 22 on the tertiary side of the transformer 10. Yes, the capacitor switch 25 brings the reactive power compensation capacitor 22 and the tertiary winding 4 into a connected state.

  The charge stored in the reactive power compensation capacitor 22 in a state where the reactive power compensation capacitor 22 and the tertiary winding 4 are connected is discharged when the reactive power compensation capacitor 22 and the tertiary winding 4 are disconnected. A discharge resistor 26 is provided for this purpose.

  The control device 20 connects a breaker 27 in series between the connector connected to the primary winding 3 and the connector connected to the power source among the arranged connectors, and the red rotary lamp outlet 28 and the varistor 29. In FIG. 7, the limit switch 30 is connected in series. However, the breaker 27, the red rotating light outlet 28, the varistor 29, and the limit switch 30 may be appropriately disposed as necessary. Good.

The other object proximity detection device 23 includes an AC / DC converter 11, a pair of other object proximity detector 12a and a break contact 12b that automatically returns, a pair of other object proximity removal timer 13a, and a break contact 13b for a timed operation instantaneous return, The undervoltage trip device 14a and the circuit breaker 14b form a pair.
The AC / DC converter 11 converts the AC voltage applied from the power supply unit into a DC voltage and supplies it to the other object proximity removal timer 13a and the undervoltage tripping device 14a.

  The other object proximity detector 12a detects a short-circuit current flowing in the primary circuit by a ground fault current caused by an arc discharge between the simulated overhead transportation facility and another object, and an electromagnetic action is applied to the break contact 12b that automatically returns. Open. As the other object proximity detector 12a, for example, “mini power relay type MY2N rated voltage AC100V” manufactured by OMRON Corporation can be used.

When the break contact 12b that automatically returns is opened and no voltage is applied, the time switch operates, for example, after 1 second, the break contact 13b for timed operation instantaneous return is generated by electromagnetic action. Open. As the other object proximity removal timer 13a, for example, “Solid state timer type H3CR power supply voltage DC24V” manufactured by OMRON Corporation can be used.
The undervoltage trip device 14a blocks the application of voltage from the power supply unit to the primary winding 3 by the circuit breaker 14b when the break contact 13b for timed operation instantaneous recovery is opened and no voltage is applied. As the circuit breaker 14b, for example, “No-fuse breaker NF-32-SW rated current 15A” manufactured by Mitsubishi Electric Corporation can be used.

  With such a configuration, the other object proximity detection device 23 senses that another object has approached the simulated overhead transportation facility and an arc discharge has occurred between the simulated overhead transportation facility and the other object, and starts the arc discharge. After a predetermined time, the application of the input voltage to the primary winding 3 can be stopped.

  In this embodiment, as shown in FIG. 7, a predetermined distance is provided so that persons other than the operator (related person) of the other-object proximity accident simulation apparatus 100 do not approach the simulated overhead transportation facility or the transformer 10. It is preferable to arrange a section 31 that is partitioned by a safety protection fence with a doorway or a wall that surrounds at least the simulated overhead transportation facility and the transformer 10.

  In this case, a limit switch 30 for a door switch that opens and closes the primary circuit of the control device 20 is disposed at the door 31a serving as the entrance / exit of the section 31 in response to opening and closing of the door 31a. Thereby, when the door 31a is opened, the limit switch 30 opens the primary circuit of the control device 20 and puts the primary circuit into a non-voltage state, thereby enclosing the simulated overhead transportation facility and the transformer 10. It is possible to ensure the safety of a person who has entered the 31.

(A) is explanatory drawing for demonstrating schematic structure of the other object proximity accident simulation apparatus in 1st Embodiment for implementing this invention, (b) is the other object proximity accident simulation apparatus shown to (a). It is a circuit diagram which shows a wiring state. It is sectional drawing which shows schematic structure of the transformer shown in FIG. It is a circuit diagram which shows the wiring state of the other object proximity accident simulation apparatus in 2nd Embodiment for implementing this invention. It is a circuit diagram which shows the wiring state of the other object proximity accident simulation apparatus in 3rd Embodiment for implementing this invention. It is. It is a circuit diagram which shows the wiring state of the other object proximity accident simulation apparatus in 4th Embodiment for implementing this invention. 5, the same reference numerals as those in FIGS. 1 to 4 denote the same or corresponding parts, and the description thereof is omitted. It is a circuit diagram which shows the wiring state of the other object proximity accident simulation apparatus in this Example. It is explanatory drawing for demonstrating the effect of the limit switch arrange | positioned at the control apparatus of the other-object accident simulation apparatus shown in FIG.

Explanation of symbols

1 housing
1a Special high voltage generating terminal
1b First ground terminal
1c Second ground terminal
2 Iron core
3 Primary winding
4 Tertiary winding
5 Secondary winding
6 Incompatible plate
7 Insulating paper
10 Transformer
11 AC / DC converter
12a Other object proximity detector
12b Break contact for automatic return
13a Other object proximity removal timer
13b Break contact for timed operation instantaneous recovery
14a Undervoltage trip device
14b circuit breaker
20 Control device
21 Limiting resistance
22 Reactive power compensation capacitor
23 Other object proximity detector
24 Discharge meter for other objects
25 condenser switch
26 Discharge resistance
27 Breaker
28 Red rotating lamp outlet
29 Barista
30 limit switch
31 sections
31a Door 100 Other object proximity accident simulator 200 Pillar transformer 200a Class B grounding point 300 Arc resistance 400 Portable generator 400a Internal resistance 400b Internal reactance

Claims (4)

A primary winding consisting of a low-voltage winding wound on the innermost layer with respect to a grounded iron core, and a secondary winding consisting of a special high-voltage winding wound on the outermost layer relative to the iron core , And another object proximity accident simulator using a transformer comprising a grounded anti-contact plate interposed between the primary winding and the secondary winding,
The transformer includes a tertiary winding composed of a low-voltage winding wound as an intermediate layer with respect to the iron core between the primary winding and the anti-contact plate.
Another object proximity accident simulation device, wherein the secondary winding and the tertiary winding are grounded. In the other object proximity accident simulator according to claim 1,
A limiting resistor is connected in series between the primary winding and a power supply unit that applies a low voltage to the primary winding, and limits a short-circuit current flowing to the primary side of the transformer by arc discharge to a predetermined current value. ,
The other object proximity accident simulation device, wherein an allowable power of the limiting resistor is smaller than an allowable power of the secondary winding. In the other object proximity accident simulator according to claim 1 or 2,
Comprising a reactive power compensation capacitor connected to the tertiary winding;
2. The proximity proximity accident simulator according to claim 1, wherein the reactive power compensation capacitor is a phase advance capacitor that cancels out a reactive current component of a short-circuit current flowing on a primary side of the transformer. In the other object approaching accident simulation device according to claim 2,
Other discharge dynamometer connected in parallel to the limiting resistor,
The other-object discharge meter senses the occurrence of arc discharge based on the current value of the short-circuit current flowing through the limiting resistor, and adds and stores the number of arc discharges for each occurrence of arc discharge. Another object proximity accident simulation device characterized by displaying frequency.

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