JP2018189706A - Short-circuit experience device, facility and short-circuit experience method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a short-circuit experience device, facilities and a short-circuit experience method which can provide an actual experience of short-circuit of two load side terminals in a watt-hour meter.SOLUTION: A short-circuit experience device comprises: a watt-hour meter including a power source side first terminal, a power source side second terminal, a load side first terminal and a load side second terminal; a first short-circuit material connected to the load side first terminal; a second short-circuit material connected to the load side second terminal; a short-circuit material control section for moving the second short-circuit material to a position abutting against the first short-circuit material on the basis of a short-circuit experience start operation; a power input section to which power to be supplied to the power source side first terminal and the power source side second terminal is inputted; a breaker disposed between the watt-hour meter and the power input section; and an isolation transformer disposed between the watt-hour meter and the breaker.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a short circuit experience device, equipment, and a short circuit experience method.

  2. Description of the Related Art Conventionally, there has been known an electric shock experience device that can experience an electric shock safely without affecting the human body (see, for example, Patent Document 1). In the electric shock experience device disclosed in Patent Document 1, the sine wave inverter applies an electric shock experience voltage to the human contact portion and causes an electric shock experience current to flow to the human during the electric shock experience time.

JP 2011-002548 A

By the way, in the electric shock experience device of Patent Document 1, the user of the electric shock experience device can experience electric shock, but experience a low-voltage short-circuit disaster that is highly likely to occur at the time of replacing the watt-hour meter with a sense of reality. Can not do it. A low-voltage short-circuit disaster occurs when the power supply side (primary side) terminal or load side (secondary side) terminal of the watt-hour meter is short-circuited.
In the event of a low-voltage short-circuit disaster, generally, the precautions when replacing the electricity meter are confirmed, and the recurrence prevention of the low-voltage short-circuit disaster has been examined on the desk, and countermeasures have been deployed horizontally. It was.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a short-circuit experience device, equipment, and a short-circuit experience method that can actually experience a short circuit between two load-side terminals of a watt-hour meter. It is to provide.

One aspect of the present invention is connected to a watt hour meter having a power source side first terminal, a power source side second terminal, a load side first terminal, and a load side second terminal, and the load side first terminal. The first short-circuit material, the second short-circuit material connected to the load-side second terminal, and the short-circuit that moves the second short-circuit material to a position where it contacts the first short-circuit material based on the short-circuit experience start operation. A material operation unit, a power input unit to which power supplied to the power source side first terminal and the power source side second terminal is input, and a circuit breaker disposed between the watt hour meter and the power input unit And a short circuit experience device comprising an insulating transformer disposed between the watt-hour meter and the circuit breaker.
By comprising in this way, since a short circuit material operation part makes a 1st short circuit material and a 2nd short circuit material contact | abut, since a short circuit current flows between a 1st short circuit material and a 2nd short circuit material, it is short circuited. A user (observer) of the experience device can actually experience a short circuit between the load-side first terminal and the load-side second terminal of the watt-hour meter. In addition, when a short-circuit current flows between the first short-circuit material and the second short-circuit material, the circuit breaker cuts off the power supply from the power input unit to the watt hour meter. It is possible to suppress the possibility that an adverse effect may be exerted on the power input unit and the part that supplies power to the power input unit. In addition, since the insulation transformer is disposed between the watt-hour meter and the circuit breaker, noise (surge voltage) when a short circuit occurs can be suppressed.

In the short-circuit experience device according to one aspect of the present invention, the first short-circuit material formed of the first leaf spring material is formed by deforming the first leaf spring material into a cylindrical shape, and the load-side first terminal Having a first tubular portion connected to the.
By configuring in this way, the first short-circuit material may be damaged at the connection position with the load-side first terminal, the short-circuit current may not flow easily, and the first short-circuit material may be cut out. In addition, it is possible to suppress the possibility that the notched portion is damaged when the short-circuit current is generated.
Further, in the short circuit experience device according to one aspect of the present invention, the second short circuit material formed of the second leaf spring material is formed by deforming the second leaf spring material into a cylindrical shape, and the load side first It has the 2nd cylindrical part connected to two terminals.
By configuring in this way, the second short-circuit material may be damaged at the connection position with the load-side second terminal, the short-circuit current may be less likely to flow than when the second short-circuit material is notched, and In addition, it is possible to suppress the possibility that the notched portion is damaged when the short-circuit current is generated.

In the short-circuit experience device according to one aspect of the present invention, the first short-circuit material has a first abutting portion constituted by a ridge line portion protruding toward the second short-circuit material, and the second short-circuit material is A hook portion that locks the pulling member of the short-circuit material operating portion; and a second contact portion that is in line contact with the first contact portion when the first short-circuit material and the second short-circuit material contact each other. Have.
By comprising in this way, the 1st contact part of the 1st short circuit material and the 2nd contact part of the 2nd short circuit material are contacted not by point contact but by line contact. Therefore, the contact at the contact position between the first short-circuit material and the second short-circuit material is more than when the first contact portion of the first short-circuit material and the second contact portion of the second short-circuit material are contacted by point contact. Variations in state can be suppressed, and strong light and sound that are generated as a short-circuit current flows can be stabilized. That is, it is possible to suppress variations in strong light and sound that occur as a short-circuit current flows.

In the short circuit experience device according to one aspect of the present invention, the first contact portion is formed by bending the first leaf spring material.
By comprising in this way, when a short circuit current flows between the 1st short circuit material and the 2nd short circuit material, the 1st short circuit material breaks in the position of the 1st contact part, and the 2nd short circuit material Breaks at the position of the second contact portion. Therefore, as the first short circuit material and the second short circuit material are brought into surface contact and welded, the short circuit current continues to flow between the first short circuit material and the second short circuit material for an unnecessarily long time. The fear can be suppressed.

The short-circuit experience device according to one aspect of the present invention further includes a substantially triangular prism-shaped housing that accommodates the watt-hour meter, the first short-circuit material, and the second short-circuit material, and the housing includes the watt-hour meter. Are attached, a right front wall portion having a translucent right window portion, and a left front wall portion having a translucent left window portion.
By comprising in this way, the light accompanying a short circuit current is stronger than the case where the watt hour meter, the first short circuit material, and the second short circuit material are accommodated in a substantially quadrangular prism-shaped housing having only the front window portion. Can be easily seen from the outside of the housing.

In the short-circuit experience device according to the aspect of the present invention, the watt-hour meter is disposed between the power-side first terminal and the power-source-side second terminal, and the load-side first terminal and the load-side second terminal. And a first protective member that protects the first wiring connected to the first terminal on the power supply side and the second wiring connected to the second terminal on the power supply side.
By comprising in this way, damage to the 1st wiring and the 2nd wiring by the heat generated when a short circuit current flows can be controlled.
Moreover, the short circuit experience apparatus of 1 aspect of this invention WHEREIN: The said housing is provided with the ceiling part which has a ventilation fan, and the translucent 2nd protection member which protects the said right window part.
By comprising in this way, damage to the right window part by the heat | fever which generate | occur | produces when a short circuit current flows can be suppressed.
Moreover, the short circuit experience apparatus of 1 aspect of this invention WHEREIN: The said housing is equipped with the translucent 3rd protection member which protects the said left window part.
With this configuration, it is possible to suppress damage to the left window due to heat generated when a short-circuit current flows.
Moreover, the short circuit experience apparatus of 1 aspect of this invention WHEREIN: The said housing is provided with the flame-retardant member arrange | positioned between the said 1st short circuit material, the said 2nd short circuit material, and the said back wall part.
With this configuration, it is possible to suppress damage to the rear wall due to heat generated when a short-circuit current flows.

One aspect of the present invention further includes another circuit breaker disposed between the power input unit and the isolation transformer, the circuit breaker has a first rated current, and the other circuit breaker includes: A facility comprising a short-circuit experience device having a second rated current greater than the first rated current, the facility power supply unit supplying power to the power input unit, the power input unit, and the facility power supply unit And the facility breaker has a third rated current, and the third rated current is equal to the second rated current.
By configuring in this way, it is possible to suppress the possibility that power will not be supplied from the power supply unit for equipment to other loads other than the short circuit experience device as the equipment circuit breaker cuts off power supply. it can.

  One aspect of the present invention is connected to a watt hour meter having a power source side first terminal, a power source side second terminal, a load side first terminal, and a load side second terminal, and the load side first terminal. The first short-circuit material, the second short-circuit material connected to the load-side second terminal, and the short-circuit that moves the second short-circuit material to a position where it contacts the first short-circuit material based on the short-circuit experience start operation. A material operation unit, a power input unit to which power supplied to the power source side first terminal and the power source side second terminal is input, and a circuit breaker disposed between the watt hour meter and the power input unit And a short-circuit experience method using a short-circuit experience device including an insulation transformer disposed between the watt-hour meter and the circuit breaker, wherein the short-circuit material operating unit includes the first short-circuit material and the second short-circuit material. By bringing the short-circuit material into contact, the first short-circuit material and the second short-circuit material Passing a short-circuit current between, a step of cutting off power supply from the power input unit to the watt hour meter, and a step of suppressing noise when the insulation transformer is short-circuited. It is a short circuit experience method including.

  ADVANTAGE OF THE INVENTION According to this invention, the short circuit experience apparatus which can actually experience the short circuit of two load side terminals of a watt-hour meter, an installation, and a short circuit experience method can be provided.

It is a lineblock diagram showing roughly an example of a short circuit experience device of one embodiment. It is a schematic perspective view of examples, such as a 1st short circuit material and a 2nd short circuit material. It is a figure which shows an example of installation environments, such as an electric energy meter. It is a front view, such as an electric energy meter in a housing. It is a figure which shows an example of the installation environment of a short circuit experience apparatus. It is a flowchart explaining an example of the process performed at the time of utilization of a short circuit experience apparatus.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a configuration diagram schematically illustrating an example of a short circuit experience device 1 according to an embodiment.
In the example shown in FIG. 1, the short-circuit experience device 1 includes a watt-hour meter 11, a first short-circuit material 12 a, a second short-circuit material 12 b, a short-circuit material operation unit 13, a power input unit 14, and a circuit breaker 15. The circuit breaker 16, the insulation transformer 17, and the relay part R are provided.
The watt hour meter 11 includes a power source side first terminal 11a, a power source side second terminal 11b, a load side first terminal 11c, a load side second terminal 11d, and a watt hour meter main body 11e. The watt-hour meter main body 11e measures the amount of power used in a load (not shown). The first short-circuit material 12a is connected to the load-side first terminal 11c. The second short-circuit material 12b is connected to the load-side second terminal 11d.

In the example illustrated in FIG. 1, the short-circuit material operating unit 13 biases the second short-circuit material 12 b toward the first short-circuit material 12 a (left side in FIG. 1). The short-circuit material operation unit 13 includes a motor 13a, a pulling member 13b, a motor drive unit 13c, a motor power supply unit 13d, and a motor control switch 13e. The motor 13a is connected to the second short-circuit material 12b via a pulling member 13b such as a string. The motor 13a is connected to the motor drive unit 13c. The motor drive unit 13c is connected to the motor power supply unit 13d and the motor control switch 13e.
In the example shown in FIG. 1, the motor 13a pulls the second short-circuit material 12b via the pulling member 13b, so that the short-circuit material operating unit 13 moves the second short-circuit material 12b to the first short-circuit material 12a side (in FIG. 1). Energize to the left). In another example, the short-circuit material operating unit 13 may push the second short-circuit material 12b to bias the second short-circuit material 12b toward the first short-circuit material 12a.
In the example shown in FIG. 1, the short-circuit material operating unit 13 urges the second short-circuit material 12 b toward the first short-circuit material 12 a by the motor 13 a. For example, the second short-circuit material 12b may be biased toward the first short-circuit material 12a by any means other than a motor such as a solenoid.

In the example shown in FIG. 1, the insulating transformer 17 includes terminals 17a, 17b, 17c, and 17d. The terminal 17c is connected to the power supply side first terminal 11a of the watt hour meter 11 through the wiring 18e1. The terminal 17d is connected to the power supply side second terminal 11b of the watt hour meter 11 through the wiring 18e2.
The circuit breaker 15 includes a circuit breaker body 15e, a lamp 15f, and terminals 15a, 15b, 15c, and 15d. The circuit breaker body 15e can block the power supply path between the terminal 15a and the terminal 15c and the power supply path between the terminal 15b and the terminal 15d. The lamp 15f is lit when the power supply path between the terminal 15a and the terminal 15c is not cut off and the power supply path between the terminal 15b and the terminal 15d is not cut off. The terminal 15c is connected to the terminal 17a of the insulating transformer 17 through the wiring 18d1. The terminal 15d is connected to the terminal 17b of the insulating transformer 17 through the wiring 18d2. The rated current of the circuit breaker 15 is set to 30 A, for example.

In the example shown in FIG. 1, the circuit breaker 16 includes a circuit breaker body 16e, a lamp 16f, a main switch 16g, an emergency stop switch 16h (normally on), and terminals 16a, 16b, 16c, and 16d. And. The circuit breaker body 16e can block the power supply path between the terminal 16a and the terminal 16c and the power supply path between the terminal 16b and the terminal 16d. The lamp 16f is lit when the power supply path between the terminal 16a and the terminal 16c is not cut off and the power supply path between the terminal 16b and the terminal 16d is not cut off. The rated current of the circuit breaker 16 is set larger than the rated current of the circuit breaker 15, for example, 50A.
The terminal 16c is connected to one end of the main switch 16g. The other end of the main switch 16g is connected to one end of an emergency stop switch 16h that is normally on. The other end of the emergency stop switch 16h is connected to one end of the electromagnetic coil portion RC of the relay portion R. The other end of the electromagnetic coil portion RC is connected to the terminal 16d.
The terminal 16a is connected to the terminal 14a of the power input unit 14 through the wiring 18a1. The terminal 16b is connected to the terminal 14b of the power input unit 14 through the wiring 18a2.

In the example illustrated in FIG. 1, the switch unit RS of the relay unit R includes terminals RS1, RS2, RS3, and RS4. The switch unit RS can block the power supply path between the terminal RS1 and the terminal RS3 and the power supply path between the terminal RS2 and the terminal RS4.
The terminal RS1 is connected to the terminal 16c of the circuit breaker 16 through the wiring 18b1. The terminal RS2 is connected to the terminal 16d of the circuit breaker 16 through the wiring 18b2. The terminal RS3 is connected to the terminal 15a of the circuit breaker 15 through the wiring 18c1. The terminal RS4 is connected to the terminal 15b of the circuit breaker 15 through the wiring 18c2.

In the example shown in FIG. 1, the circuit breaker body 16e of the circuit breaker 16 does not block the power supply path between the terminal 16a and the terminal 16c, and does not block the power supply path between the terminal 16b and the terminal 16d. When the main switch 16g and the emergency stop switch 16h are turned on, energization from the power input unit 14 to the electromagnetic coil unit RC of the relay unit R is performed. As a result, the switch unit RS of the relay unit R does not block the power supply path between the terminals RS1 and RS3, and does not block the power supply path between the terminals RS2 and RS4. Furthermore, when the circuit breaker body 15e of the circuit breaker 15 does not block the power supply path between the terminal 15a and the terminal 15c and does not block the power supply path between the terminal 15b and the terminal 15d, the power input unit 14 Then, electric power is supplied to the power source side first terminal 11 a and the power source side second terminal 11 b of the watt hour meter 11 through the insulating transformer 17.
That is, in the example illustrated in FIG. 1, the circuit breaker 15 is disposed between the watt hour meter 11 and the power input unit 14. The insulation transformer 17 is disposed between the watt-hour meter 11 and the circuit breaker 15.

In the example illustrated in FIG. 1, for example, when the operator of the short-circuit experience device 1 turns on the main switch 16 g of the circuit breaker 16, the power input unit 14 is connected to the power-side first terminal 11 a and the power-side first Power is supplied to the two terminals 11b. As a result, a potential difference is generated between the first short-circuit material 12a and the second short-circuit material 12b due to the power supplied to the watt-hour meter 11. Further, for example, when the operator of the short-circuit experience device 1 turns on the motor control switch 13e of the short-circuit material operation unit 13, the motor 13a operates and pulls the second short-circuit material 12b via the pulling member 13b. Thereby, the 2nd short circuit material 12b moves to the 1st short circuit material 12a side (left side of Drawing 1), and the 1st short circuit material 12a and the 2nd short circuit material 12b contact. As a result, a short-circuit current flows between the first short-circuit material 12a and the second short-circuit material 12b, and strong light (arc) and sound are generated. Therefore, the user (observer) of the short circuit experience device 1 can actually experience a short circuit between the load side first terminal 11 c and the load side second terminal 11 d of the watt hour meter 11.
Moreover, in the example shown in FIG. 1, when a short circuit current flows between the 1st short circuit material 12a and the 2nd short circuit material 12b, the circuit breaker 15 is the electric power supply path | route between the terminal 15a and the terminal 15c, And the electric power supply from the electric power input part 14 to the watt hour meter 11 is interrupted | blocked by interrupting | blocking the electric power supply path | route between the terminal 15b and the terminal 15d. Therefore, the short circuit experience device 1 can suppress the possibility that the adverse effect caused by generating the short circuit current will affect the power input unit 14 (and the part that supplies power to the power input unit 14).

Moreover, in the example shown in FIG. 1, since the circuit breaker 15 interrupts | blocks the electric power supply from the electric power input part 14 to the watt hour meter 11, an adverse effect has a part which supplies electric power to the electric power input part 14 (and electric power input part 14). (For example, other loads in the equipment P)) can be suppressed. Furthermore, since the insulation transformer 17 is disposed, the short circuit experience device 1 can suppress noise (surge voltage) at the time of occurrence of a short circuit as compared with the case where the insulation transformer 17 is not disposed.
The user of the short-circuit experience device 1 can actually experience the arc (light), sound, and the like when a low-voltage short-circuit occurs, and can consider the fear of a low-voltage short-circuit. In addition, the user of the short-circuit experience device 1 can recognize the importance of protective equipment (safety cap, low-pressure glove, arc-proof surface, etc.) for low-voltage short-circuit countermeasures, and raises safety awareness and ability in daily work. be able to.

In the example illustrated in FIG. 1, the short circuit experience device 1 further includes a circuit breaker 16 disposed between the power input unit 14 and the insulation transformer 17 in addition to the circuit breaker 15. The rated current of the circuit breaker 16 is set to, for example, 50 A, which is different from the rated current (30 A) of the circuit breaker 15.
Depending on how the short-circuit current flows between the first short-circuit material 12a and the second short-circuit material 12b, the circuit breaker 15 having a smaller rated current (30A) may have power before the circuit breaker 16 having a larger rated current (50A). The supply path is not necessarily interrupted.
Therefore, in the example shown in FIG. 1, when a short-circuit current flows between the first short-circuit material 12a and the second short-circuit material 12b, the circuit breaker 15 temporarily supplies power from the power input unit 14 to the watt-hour meter 11. Even if not interrupted, the circuit breaker 16 blocks the power supply from the power input unit 14 to the watt hour meter 11 instead of the circuit breaker 15. Therefore, in the example shown in FIG. 1, the power input unit 14 (and the part that supplies power to the power input unit 14) is affected more adversely by generating a short-circuit current than when the circuit breaker 16 is not provided. The fear can be suppressed.
In another example, the circuit breaker 16 may be omitted.

FIG. 2 is a schematic perspective view of an example of the first short-circuit material 12a, the second short-circuit material 12b, and the like.
The first short circuit material 12a and the second short circuit material 12b described with reference to FIG. 1 can be configured as shown in FIG. 2 as an example.
In the example shown in FIG. 2, the first short-circuit material 12a is formed of a leaf spring material. The first short-circuit material 12a includes a cylindrical portion 12a1 and a contact portion 12a2.
The cylindrical portion 12a1 is formed by deforming a leaf spring material into a cylindrical shape. The cylindrical portion 12a1 is, for example, in a hole (not shown) provided in the watt hour meter main body portion 11e of the watt hour meter 11 as in the example described in FIGS. 2 and 7 of Japanese Patent No. 5840817. It is inserted and connected to the load side first terminal 11c.
That is, in the example shown in FIG. 2, in order to insert a part of the first short circuit material 12a into the hole of the watt hour meter main body part 11e, the first short circuit material 12a is not cut out, but the cylindrical part 12a1 is formed. Is formed. Therefore, compared with the case where the first short-circuit material 12a is notched, the first short-circuit material 12a may be damaged at the connection position with the load-side first terminal 11c, the short-circuit current may not easily flow, and the short-circuit current It is possible to suppress the possibility that the notched portion is damaged at the time of occurrence.

In the example shown in FIG. 2, the contact part 12a2 is comprised by the ridgeline part which protrudes in the 2nd short circuit raw material 12b side (right side of FIG. 2). The contact portion 12a2 is formed by bending a leaf spring material.
The 2nd short circuit material 12b is formed with the leaf | plate spring material similarly to the 1st short circuit material 12a. The second short-circuit material 12b includes a cylindrical portion 12b1, a hook portion 12b2, and a contact portion 12b3.
The cylindrical portion 12b1 is formed by deforming a leaf spring material into a cylindrical shape, similarly to the cylindrical portion 12a1. The cylindrical portion 12b1 is inserted into another hole (not shown) provided in the watt hour meter main body portion 11e of the watt hour meter 11, and is connected to the load side second terminal 11d.
Therefore, the second short-circuit material 12b may be damaged at the connection position with the load-side second terminal 11d, the short-circuit current may be less likely to flow, and the short-circuit current than when the second short-circuit material 12b is notched. It is possible to suppress the possibility that the notched portion is damaged at the time of occurrence.

In the example shown in FIG. 2, the hook part 12b2 is formed by curving the strip-shaped part of the leaf spring material. The pulling member 13b of the short-circuit material operating unit 13 (see FIG. 1) is locked to the hook unit 12b2.
When the hook portion 12b2 is pulled by the pulling member 13b toward the first short-circuit material 12a (the left side in FIG. 2) and the first short-circuit material 12a and the second short-circuit material 12b come into contact with each other, the contact indicated by a broken line in FIG. The contact portion 12b3 is in line contact with the contact portion 12a2.
That is, in the example shown in FIG. 2, the contact portion 12a2 of the first short-circuit material 12a and the contact portion 12b3 of the second short-circuit material 12b are contacted not by point contact but by line contact. Therefore, the contact position between the first short-circuit material 12a and the second short-circuit material 12b is more than the case where the contact portion 12a2 of the first short-circuit material 12a and the contact portion 12b3 of the second short-circuit material 12b are contacted by point contact. The variation in the contact state can be suppressed, and the strong light and sound that are generated as the short-circuit current flows can be stabilized. That is, it is possible to suppress variations in strong light and sound that occur as a short-circuit current flows.

FIG. 3 is a diagram illustrating an example of an installation environment such as the watt-hour meter 11. Specifically, FIG. 3A is a view of the housing 19 and the like that accommodate the watt hour meter 11 and the like, and FIG. 3B is a view of the housing 19 and the like that accommodates the watt hour meter 11 and the like from the lower side. It is a figure. FIG. 4 is a front view of the watt hour meter 11 and the like in the housing 19. Specifically, FIG. 4 is a diagram illustrating a state after a short-circuit current flows between the first short-circuit material 12a and the second short-circuit material 12b.
In the example shown in FIG. 3A, FIG. 3B, and FIG. 4, the short circuit experience device 1 (see FIG. 1) includes the watt-hour meter 11, the first short circuit material 12a, and the second short circuit material 12b. A housing 19 having a substantially triangular prism shape is further provided.
The housing 19 includes a floor portion 19a, a ceiling portion 19b, a rear wall portion 19c, a right front wall portion 19d, and a left front wall portion 19e. A ventilation fan 19b1 is provided on the ceiling portion 19b. The watt hour meter 11 is attached to the rear wall portion 19c. Further, a flame retardant member 19f is attached to the rear wall portion 19c. That is, the flame-retardant member 19f is disposed between the contact portion 12a2 of the first short-circuit material 12a and the contact portion 12b3 of the second short-circuit material 12b and the rear wall portion 19c. The flame retardant member 19f suppresses damage to the rear wall portion 19c due to heat generated when a short-circuit current flows.
The right front wall portion 19d has a translucent right window portion 19d1. A translucent protective member 19d2 is attached to the surface of the right window portion 19d1 facing the watt hour meter 11. The protection member 19d2 protects the right window portion 19d1 and suppresses damage to the right window portion 19d1 due to heat generated when a short-circuit current flows.
The left front wall portion 19e has a translucent left window portion 19e1. A protective member 19e2 is attached to the surface of the left window portion 19e1 that faces the watt hour meter 11. The protection member 19e2 protects the left window portion 19e1 and suppresses damage to the left window portion 19e1 due to heat generated when a short-circuit current flows.

In the example shown in FIG. 3A and FIG. 3B, the watt hour meter 11, the first short-circuit material 12a, and the second short-circuit are provided in a substantially triangular prism-shaped housing 19 having a right window portion 19d1 and a left window portion 19e1. The material 12b is accommodated. Therefore, compared to the case where the watt hour meter 11, the first short-circuit material 12a, and the second short-circuit material 12b are housed in a substantially quadrangular prism-shaped housing having only the front window portion, the light that is caused by the short-circuit current is 19 can be easily seen from the outside.
That is, in the example shown in FIG. 3A and FIG. 3B, the watt hour meter 11, the first short-circuit material 12a, and the second short-circuit material 12b are accommodated in a substantially quadrangular prism-shaped housing having only the front window portion. In this case, the users PS1 and PS2 of the short circuit experience device 1 who are located in the blind spot can observe the strong light accompanying the short circuit current from the outside of the housing 19.
That is, in the example shown in FIG. 3A and FIG. 3B, the user of the short-circuit experience device 1 is connected to the first short-circuit material 12a and the first while securing the volume of the space in which the arc accompanying the occurrence of the short-circuit current flies. 2 It can be brought close to the contact position with the short-circuit material 12b.

In the example shown in FIG. 4, the contact portion 12a2 of the first short-circuit material 12a and the contact portion 12b3 of the second short-circuit material 12b are contacted by line contact, and the first short-circuit material 12a and the second short-circuit material 12b When a short-circuit current flows during this period, the first short-circuit material 12a breaks at the position of the contact portion 12a2. In this case, the second short-circuit material 12b is broken at the position of the contact portion 12b3.
Therefore, in the example shown in FIG. 4, as the first short-circuit material 12a and the second short-circuit material 12b are in surface contact and welded, a short-circuit current is generated between the first short-circuit material 12a and the second short-circuit material 12b. Therefore, it is possible to suppress the risk of continuing to flow for a longer time than necessary.

  In the example shown in FIG. 4, the watt hour meter 11 further includes a protection member 11 f. The protection member 11f is made of a flame retardant material. Further, the protection member 11f is disposed between the power supply side first terminal 11a and the power supply side second terminal 11b, and the load side first terminal 11c and the load side second terminal 11d. The protection member 11f protects the wiring 18e1 connected to the power supply side first terminal 11a and the wiring 18e2 connected to the power supply side second terminal 11b, and damages to the wirings 18e1 and 18e2 due to heat generated when a short-circuit current flows. Suppress.

FIG. 5 is a diagram illustrating an example of an installation environment of the short circuit experience device 1.
In the example shown in FIG. 5, the short circuit experience device 1 is provided in the facility P. In addition to the short circuit experience device 1, the facility P includes a facility power supply P1 and a facility breaker P2. The power supply unit P1 for equipment supplies power to the power input unit 14 of the short circuit experience device 1 and the like. The facility circuit breaker P2 is disposed between the facility power supply unit P1 and the power input unit 14 of the short circuit experience device 1. The facility circuit breaker P2 is a power supply path from the facility power supply unit P1 via the wiring P3a to the power input unit 14 of the short circuit experience device 1, and the power of the short circuit experience device 1 from the facility power supply unit P1 via the wiring P3b. The power supply path to the input unit 14 can be cut off. The rated current of the facility breaker P2 is set to a value (for example, 50 A) equal to the rated current of the breaker 16.

In the example shown in FIGS. 1 and 5, when a short-circuit current flows between the first short-circuit material 12 a and the second short-circuit material 12 b and the facility circuit breaker P <b> 2 is likely to interrupt the power supply. Even before, the circuit breaker 16 cuts off the power supply from the power input unit 14 to the watt hour meter 11 before the equipment breaker P2 cuts off the power supply. As a result, it is possible to suppress the possibility that the facility circuit breaker P2 interrupts the power supply.
Specifically, in the example shown in FIGS. 1 and 5, the rated current of the facility breaker P <b> 2 is set to a value equal to the rated current of the breaker 16. Therefore, even if it becomes a situation where the circuit breaker P2 for equipment has the possibility of interrupting | blocking electric power supply with generation | occurrence | production of a short circuit current, before the circuit breaker P2 for equipment interrupts | blocks electric power supply, The circuit breaker 16 that is closer to the short-circuit position than the circuit breaker P <b> 2 blocks the power supply from the power input unit 14 to the watt hour meter 11.
That is, even if the facility circuit breaker P2 is in a situation where the power supply may be interrupted due to the occurrence of a short-circuit current, the facility circuit breaker P2 does not interrupt the power supply. 16 cuts off the power supply.
Therefore, in the example shown in FIG. 1 and FIG. 5, power is not supplied from the power supply unit P1 for equipment to loads other than the short circuit experience device 1 as the equipment breaker P2 cuts off power supply. It is possible to suppress the risk of being lost.

FIG. 6 is a flowchart for explaining an example of processing performed when the short-circuit experience device 1 is used.
In the example illustrated in FIG. 6, in step S <b> 11, the operator of the short circuit experience device 1 connects the first short circuit material 12 a to the load-side first terminal 11 c of the watt hour meter 11 and connects the second short circuit material 12 b to the watt hour meter 11. To the load-side second terminal 11d.
Next, in step S12, the operator of the short circuit experience device 1 locks the pulling member 13b of the short circuit material operation unit 13 to the hook portion 12b2 of the second short circuit material 12b.
Next, in step S13, the operator of the short circuit experience device 1 closes the right window portion 19d1 and the left window portion 19e1 of the housing 19.
Next, in step S14, the operator of the short circuit experience device 1 turns on the main switch 16g and the emergency stop switch 16h of the circuit breaker 16, and turns on the motor control switch 13e of the short circuit material operation unit 13. As a result, the 1st short circuit material 12a and the 2nd short circuit material 12b contact | abut, a short circuit current flows between the 1st short circuit material 12a and the 2nd short circuit material 12b, and a strong light and a sound generate | occur | produce.
Next, in step S15, the circuit breaker 15 or the circuit breaker 16 interrupts the power supply from the power input unit 14 to the watt hour meter 11, or the first short circuit material 12a or the second short circuit material 12b is a contact portion. By breaking at the positions 12a2 and 12b3, the short circuit current is terminated, and the strong light and sound are terminated.
Next, in step S16, the operator of the short circuit experience device 1 opens the right window portion 19d1 and the left window portion 19e1 of the housing 19.
Next, in step S17, the operator of the short circuit experience device 1 determines whether or not the protection members 19d2, 19e2 and the flame retardant member 19f need to be replaced. When the replacement of the protection members 19d2, 19e2 and the flame retardant member 19f is necessary, the process proceeds to step S18, and when the replacement of the protection members 19d2, 19e2 and the flame retardant member 19f is not necessary, the process proceeds to step S19.

In step S18, the operator of the short circuit experience device 1 replaces the protection members 19d2, 19e2 and the flame retardant member 19f. Next, the process proceeds to step S19.
In step S19, the operator of the short-circuit experience device 1 determines whether or not there is a next demonstration in which a short-circuit current flows between the first short-circuit material 12a and the second short-circuit material 12b. If there is a next demonstration, the process proceeds to step S20. If there is no next demonstration, the process shown in FIG. 6 ends.
In step S20, the operator of the short-circuit experience device 1 removes the first short-circuit material 12a broken at the position of the contact portion 12a2 from the load-side first terminal 11c of the watt-hour meter 11, and breaks at the position of the contact portion 12b3. The second short-circuit material 12 b is removed from the load-side second terminal 11 d of the watt-hour meter 11. Next, the process returns to step S11.

[Summary of this embodiment]
As described above, the short-circuit experience device 1 according to the present embodiment includes the power-side first terminal 11a, the power-side second terminal 11b, the load-side first terminal 11c, and the load-side second terminal 11d. Based on the quantity meter 11, the first short-circuit material 12a connected to the load-side first terminal 11c, the second short-circuit material 12b connected to the load-side second terminal 11d, and the short-circuit experience start operation, the second short-circuit A short-circuit material operating unit 13 that moves the material 12b to a position where it abuts against the first short-circuit material 12a; a power input unit 14 that receives power supplied to the power-source-side first terminal 11a and the power-source-side second terminal 11b; The circuit breaker 15 arrange | positioned between the watt-hour meter 11 and the electric power input part 14 and the insulation transformer 17 arrange | positioned between the watt-hour meter 11 and the circuit breaker 15 are provided.
According to the short-circuit experience device 1 of the present embodiment, the short-circuit material operating unit 13 brings the first short-circuit material 12a and the second short-circuit material 12b into contact with each other by bringing the first short-circuit material 12a and the second short-circuit material 12b into contact with each other. Since the short circuit current flows between them, the user (observer) of the short circuit experience device 1 can actually experience a short circuit between the load side first terminal 11c and the load side second terminal 11d of the watt hour meter 11. . In addition, when a short-circuit current flows between the first short-circuit material 12a and the second short-circuit material 12b, the circuit breaker 15 interrupts the power supply from the power input unit 14 to the watt-hour meter 11, so the short-circuit current is reduced. It is possible to suppress a possibility that an adverse effect caused by the generation will affect the power input unit 14 (and a part that supplies power to the power input unit 14 (for example, another load in the facility P)). In addition, since the insulation transformer 17 is arranged, noise at the time of occurrence of a short circuit is suppressed as compared with the case where no insulation transformer is arranged, and the user of the short circuit experience device 1 experiences a strong light and sound accompanying the short circuit current. be able to.

  As mentioned above, although the form for implementing this invention was demonstrated using embodiment, this invention is not limited to such embodiment at all, In the range which does not deviate from the summary of this invention, various deformation | transformation and substitution Can be added.

DESCRIPTION OF SYMBOLS 1 ... Short circuit experience apparatus, 11 ... Electricity meter, 11a ... Power supply side 1st terminal, 11b ... Power supply side 2nd terminal, 11c ... Load side 1st terminal, 11d ... Load side 2nd terminal, 11f ... Protection member, 12a ... 1st short circuit material, 12a1 ... cylindrical part, 12a2 ... contact part, 12b ... 2nd short circuit material, 12b1 ... cylindrical part, 12b2 ... hook part, 12b3 ... contact part, 13 ... short circuit material operation part, 14 DESCRIPTION OF SYMBOLS ... Power input part, 15 ... Circuit breaker, 16 ... Circuit breaker, 17 ... Insulation transformer, 18e1 ... Wiring, 18e2 ... Wiring, 19 ... Housing, 19c ... Rear wall part, 19d ... Right front wall part, 19d1 ... Right window part , 19d2 ... Protective member, 19e ... Left front wall portion, 19e1 ... Left window portion, 19e2 ... Protective member, 19f ... Flame retardant member, P ... Equipment, P1 ... Power supply unit for equipment, P2 ... Circuit breaker for equipment

Claims (8)

A watt hour meter having a power source side first terminal, a power source side second terminal, a load side first terminal, and a load side second terminal;
A first short-circuit material connected to the load-side first terminal;
A second short-circuit material connected to the load-side second terminal;
Based on a short circuit experience start operation, a short circuit material operation unit that moves the second short circuit material to a position where the second short circuit material contacts the first short circuit material;
A power input unit to which power supplied to the power supply side first terminal and the power supply side second terminal is input;
A circuit breaker disposed between the watt-hour meter and the power input unit;
A short-circuit experience device comprising: an insulation transformer disposed between the watt-hour meter and the circuit breaker. The first short circuit material formed by the first leaf spring material is:
Formed by deforming the first leaf spring material into a tubular shape, and having a first tubular portion connected to the load-side first terminal;
The second short circuit material formed by the second leaf spring material is:
Formed by deforming the second leaf spring material into a tubular shape, and having a second tubular portion connected to the load-side second terminal;
The short-circuit experience apparatus according to claim 1. The first short circuit material is:
Having a first abutting portion constituted by a ridge line portion protruding toward the second short-circuit material side;
The second short-circuit material is
A hook portion for locking the pulling member of the short-circuit material operation portion;
When the first short-circuit material and the second short-circuit material are in contact with each other, the first contact portion has a second contact portion that is in line contact with the first contact portion.
The short circuit experience apparatus according to claim 2. The first contact portion is formed by bending the first leaf spring material.
The short circuit experience apparatus according to claim 3. A housing having a substantially triangular prism shape that accommodates the watt-hour meter, the first short-circuit material, and the second short-circuit material;
The housing is
A rear wall to which the watt-hour meter is attached;
A right front wall portion having a translucent right window portion;
A left front wall portion having a translucent left window portion,
The short circuit experience apparatus as described in any one of Claims 1-4. The electricity meter
A first wiring connected between the power source side first terminal and the power source side second terminal, the load side first terminal and the load side second terminal, and connected to the power source side first terminal; A first protection member for protecting the second wiring connected to the power supply side second terminal;
The housing is
A ceiling portion having a ventilation fan;
A translucent second protective member that protects the right window;
A translucent third protective member that protects the left window,
A flame retardant member disposed between the first short circuit material and the second short circuit material, and the rear wall;
The short circuit experience apparatus according to claim 5. Further comprising another circuit breaker disposed between the power input unit and the isolation transformer,
The circuit breaker has a first rated current;
The other circuit breaker has a second rated current larger than the first rated current.
A facility comprising the short circuit experience device according to any one of claims 1 to 6,
A power supply unit for equipment for supplying power to the power input unit;
A facility circuit breaker disposed between the power input unit and the facility power supply unit;
The facility circuit breaker has a third rated current;
The third rated current is equal to the second rated current;
Facility. A watt hour meter having a power source side first terminal, a power source side second terminal, a load side first terminal, and a load side second terminal;
A first short-circuit material connected to the load-side first terminal;
A second short-circuit material connected to the load-side second terminal;
Based on a short circuit experience start operation, a short circuit material operation unit that moves the second short circuit material to a position where the second short circuit material contacts the first short circuit material;
A power input unit to which power supplied to the power supply side first terminal and the power supply side second terminal is input;
A circuit breaker disposed between the watt-hour meter and the power input unit;
A short circuit experience method using a short circuit experience device comprising an insulation transformer disposed between the watt-hour meter and the circuit breaker,
A step of causing a short-circuit current to flow between the first short-circuit material and the second short-circuit material by causing the first short-circuit material and the second short-circuit material to come into contact with each other;
The circuit breaker interrupts power supply from the power input unit to the watt hour meter; and
The insulation transformer includes a step of suppressing noise when a short circuit occurs.

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