Fuse device for cable connection training

Abstract

To provide a cable connection training fuse device that can perform a training of connecting a cable to a terminal board of a fuse holder in a similar situation to the situation of an actual machine.SOLUTION: A cable connection training fuse device 1 includes a terminal board 22 for connecting a cable 105, and is configured by attaching a fuse holder 10 for containing a fuse 30 to a freely carried base board 50. The terminal board 22 is configured to screw the cable 105. To the terminal board 22, dummy cables 100, 102 different from a cable 105 to additionally connect are connected in advance.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a fuse device for cable connection training, for carrying out training in connecting a cable to a terminal block of a fuse holder. [Background technology]

[0002] Nuclear power plants systematically conduct emergency response training that assumes accidents caused by natural disasters such as earthquakes and tsunamis, and fires, etc. These emergency response training includes individual training such as training on receiving power on-site in the event of a total loss of AC power, training on alternative water injection using water trucks into the reactor and fuel pool, and training on reporting and contacting, as well as comprehensive training in which multiple individual training exercises are conducted simultaneously to confirm command and control and cooperation with related parties (see, for example, Non-Patent Document 1).

[0003] In addition to the above, various other individual training exercises are planned, one of which is training in opening the main steam safety relief valve using a battery system. This training is to prepare for the case where the power source for sending the operation signal for the main steam safety relief valve from the central control room becomes unavailable, and to ensure that the power source for sending the operation signal from the battery is secured and the main steam safety relief valve can be operated.

[0004] The main steam safety relief valve is a valve that discharges steam from the reactor pressure vessel to the suppression pool when the pressure inside the reactor pressure vessel reaches or exceeds a set pressure (see, for example, Patent Document 1). The main steam safety relief valve is provided with a solenoid valve for operating the valve, and the solenoid valve is connected to an electrical system. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-138102 A [Non-patent literature]

[0006] [Non-Patent Document 1] https: / / www.energia.co.jp / anzen_taisaku / safety6 / index.html Summary of the Invention [Problem to be solved by the invention]

[0007] If the power source for sending the activation signal for the main steam relief safety valve from the central control room becomes unavailable, a new cable must be connected to the existing electrical system to send the activation signal from a storage battery. This new cable is connected to the terminal block of the fuse holder built into the electrical system in the control panel.

[0008] In the actual operation of opening the main steam safety relief valve, since there is no power supply, the cable is connected to the terminal block by relying on the headlight attached to the helmet. Also, since the actual fuse holder is installed inside the control panel, the cable connection operation is not easy. For this reason, it is desirable to learn the cable connection procedure using the actual machine in training, but connecting the cable to the actual machine cannot eliminate the possibility of causing a malfunction in the actual machine. For this reason, in the training for opening the main steam safety relief valve, the cable connection part is performed as a simulated operation.

[0009] For these reasons, there is a need for the development of a device that can actually connect cables to the terminal blocks of fuse holders. The device should be close to the actual device or a simulation of the actual device, and it is preferable that training in connecting cables to the terminal blocks of fuse holders be conducted under conditions as close to the actual device as possible.

[0010] An object of the present invention is to provide a fuse device for cable connection training that enables training in connecting a cable to a terminal block of a fuse holder under conditions approximating those of an actual device. [Means for solving the problem]

[0011] The present invention relates to This fuse device is used for cable connection training and is placed on the floor of an existing control panel. Portable base plate and attached to the base plate. A fuse holder that has a terminal block for connecting cables and contains a fuse and an adsorption means capable of adsorbing to the floor surface of the control panel. This is a fuse device for cable connection training.

[0012] In the fuse device for cable connection training according to the present invention, it is preferable that the terminal block has a structure in which the cable is secured by screws.

[0013] In the fuse device for cable connection training according to the present invention, it is preferable that a dummy cable is connected to the terminal block.

[0014] In the fuse device for cable connection training according to the present invention, two or more fuse holders are attached in parallel to the base plate, and each fuse holder has: Used in existing control panels It is preferable that the fuse number or the number of the device to which the fuse is connected is attached.

[0015] The fuse device for cable connection training according to the present invention preferably further comprises a self-supporting stand for holding the base plate in an upright position.

[0016] In the fuse device for cable connection training according to the present invention, it is preferable that the fuse holder has the same structure and size as a fuse holder attached to an existing control panel.

[0018] In the fuse device for cable connection training according to the present invention, On the control panel Nuclear power plant battery storage facilities Control panel can be preferably used. Effect of the Invention

[0019] According to the present invention, it is possible to provide a fuse device for cable connection training that enables training in connecting a cable to a terminal block of a fuse holder under conditions similar to those of an actual device. [Brief description of the drawings]

[0020] [Figure 1] 1 is an external view of a fuse device 1 for cable connection training according to a first embodiment of the present invention. [Diagram 2] 1 is a plan view for explaining a method of using a fuse device 1 for cable connection training according to a first embodiment of the present invention. FIG. [Diagram 3] 1A to 1C are diagrams for explaining a method of using the fuse device 1 for cable connection training according to the first embodiment of the present invention. [Figure 4] 1 is an external view of a fuse device 2 for cable connection training according to a second embodiment of the present invention. FIG. [Diagram 5] 11 is an external view of a fuse device 3 for cable connection training according to a third embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] FIG. 1 is an external view of a fuse device 1 for cable connection training according to a first embodiment of the present invention. FIG. 2 is a plan view for explaining how to use the fuse device 1 for cable connection training, in which the fuse holder 10 on the left side of the figure shows a state before a new cable 105 is connected, and the fuse holder 10 on the right side shows a state after the new cable 105 is connected. Note that the fuse holder 10 on the right side of FIG. 2 is illustrated with a part of the eaves-shaped plate 14 cut out. FIG. 3 is a diagram for explaining how to use the fuse device 1 for cable connection training, showing a state in which the fuse device 1 for cable connection training is placed on a floor surface 202 in a control panel 200 of a real machine shown in schematic form. The control panel 200 in FIG. 3 is in a state in which the doors 204 and 206 are open.

[0022] The fuse device 1 for cable connection training of the first embodiment of the present invention is a fuse device for training in opening the main steam safety relief valve of the battery facility of a nuclear power plant, and is used for training in connecting a new cable 105 to the terminal block 22 of the fuse holder 10. The fuse device 1 for cable connection training of this embodiment is configured by fixing two fuse holders 10, each with a gap between them, to a base plate 50. Since the solenoid valve for the main steam safety relief valve is used with two fuses set for one solenoid valve, two fuses 30 and fuse holders 10 are attached here. The two fuses 30 and fuse holders 10 have the same structure and shape.

[0023] The fuse holder 10 comprises a roughly rectangular case body 12 with an open top, a removable top cover 18 that covers the top surface of the case body 12, and a pair of clips 20 that clamp a cylindrical fuse 30 inside the case body 12. The case body 12 has a hood-like plate 14 at the top of one end, and a label 16 indicating training purposes and polarity is affixed to the top surface.

[0024] Furthermore, a pair of terminal blocks 22 that connect to the clips 20 are provided inside the case body 12. The terminal blocks 22 are of a type that use screws 24 to connect cables. The two fuse holders 10 are fixed to the base plate 50 with a gap between them and screws 32. Dummy cables 100, 102 are attached to the fuse holders 10 to imitate fuse holders 210 of an actual control panel 200. The cable 100 that is hung between the two fuse holders 10 corresponds to the primary cable, and the cables 102 attached to each fuse holder 10 correspond to the secondary cable.

[0025] The fuse 30 and fuse holder 10 used here preferably have the same structure, shape, and size as those used in the main steam safety relief valve of a nuclear power plant and attached to the control panel 200 of an actual machine. Furthermore, the fuse holder 10 preferably has cables 100, 102 attached to the terminal block 22, similar to the fuse holder 210 of an actual machine, as shown in this embodiment. Since the fuse device 1 for cable connection training is intended for training in connecting a new cable 105 to the terminal block 22 of the fuse holder 10, the effectiveness of the training is increased by approximating the condition of the actual machine.

[0026] The base plate 50 is a portable rectangular plate that supports two fuse holders 10 attached to an upper surface 52. A label 54 indicating that the device is for training purposes is affixed to the upper surface 52 of the base plate 50. The material of the base plate 50 is not particularly limited, but a metal plate that is somewhat heavy is preferable. The fuse device 1 for cable connection training is used by placing it on the floor surface 202 of a control panel 200 as shown in FIG. 3 during training, so making the base plate 50 heavy makes it stable.

[0027] A magnet may be used for the base plate 50, or a plastic magnet or rubber magnet may be attached to the bottom surface of the base plate 50. Also, a suction cup may be attached to the bottom surface of the base plate 50. Since the fuse device 1 for cable connection training is used by placing it on the floor surface 202 of the control panel 200, the base plate 50 becomes stable when it is attached to the floor surface 202.

[0028] The fuse device 1 for cable connection training configured as described above is preferably of a size that can be placed on the floor surface 202 of the control panel 200 of an actual nuclear power plant. When operating the main steam safety relief valve using the battery equipment of an actual nuclear power plant, it is necessary to connect a cable from the battery to a specified fuse holder 210 in the control panel 200. If the fuse device 1 for cable connection training is placed on the floor surface 202 of the control panel 200 of the actual plant and training is performed, training can be performed under conditions that are closer to reality.

[0029] The method of using the fuse device 1 for cable connection training will be described. Here, it corresponds to training on the main steam safety relief valve opening operation using the battery equipment of an actual nuclear power plant. For this reason, the power supply is lost, the lights are turned off, and the workers work using their headlights as illumination. The fuse device 1 for cable connection training is placed on the floor surface 202 of the control panel 200 of the actual machine.

[0030] As with the fuse holder 10 on the right side of Fig. 2, the top cover 18 and fuse 30 are removed. Then, the screw 24 of the upper terminal block 22 is loosened and a new cable 105 is connected to it. The cable 105 to be connected is also a dummy cable for training purposes. The same operation is performed for the fuse holder 10 on the left side of Fig. 2.

[0031] As described above, by using the fuse device 1 for cable connection training according to the first embodiment of the present invention, training in cable connection to a fuse holder terminal block can be conducted under conditions close to those of an actual machine. In particular, in training for opening the main steam safety relief valve in a storage battery facility of a nuclear power plant, where training in cable connection has not been possible until now, training in cable connection to a fuse holder terminal block can be conducted under conditions close to those of an actual machine.

[0032] Fig. 4 is an external view of a fuse device 2 for cable connection training according to a second embodiment of the present invention. The same components as those of the fuse device 1 for cable connection training according to the first embodiment of the present invention shown in Figs. 1 to 3 are designated by the same reference numerals and will not be described.

[0033] The fuse device 2 for cable connection training of the second embodiment is a fuse device for training in the main steam safety relief valve opening operation of a battery facility of a nuclear power plant, similar to the fuse device 1 for cable connection training of the first embodiment, and has the same basic configuration as the fuse device 1 for cable connection training of the first embodiment. The following description will focus on the differences from the fuse device 1 for cable connection training of the first embodiment.

[0034] As shown in Fig. 3, in the actual device, multiple fuse holders 210 are attached to the inner side wall of a control panel 200 with close spacing between them in the vertical direction. Furthermore, the fuse holders 210 in the actual device are given fuse numbers or the numbers of the equipment to which they are connected. The fuse device 2 for cable connection training of the second embodiment also has four fuse holders 10 fixed to the base plate 50 with close spacing between them in the vertical direction. Furthermore, each fuse holder 10 has a label 16 with the number of the equipment to which it is connected attached to the eaves-shaped plate 14.

[0035] The fuse 30 and fuse holder 10 used here, like the fuse device 1 for cable connection training of the first embodiment, preferably have the same structure, shape, and size as those used in the main steam safety relief valve of a nuclear power plant and attached to the control panel 200 of the actual machine. Furthermore, the numbers written on the label 16 are preferably the same fuse numbers and the same equipment numbers as those of the fuse holder 210 of the actual machine.

[0036] In the control panel 200 of the actual machine, there is little space because each fuse holder 210 is sandwiched between other fuse holders 210. Fuse holders 210 arranged in this way have a small space, making it difficult to connect a new cable 105. The fuse device 2 for cable connection training of the second embodiment reproduces a state closer to that of the actual machine, including the arrangement of fuse holders 10 and labels 16, allowing for effective training.

[0037] As can be seen from this, in the fuse device 2 for cable connection training, by mounting at least three fuse holders 10 closely spaced apart on the base plate 50, it is possible to reproduce conditions close to those of an actual device.

[0038] Fig. 5 is an external view of a fuse device 3 for cable connection training according to a third embodiment of the present invention. The same components as those of the fuse devices 1 and 2 for cable connection training according to the first and second embodiments of the present invention shown in Figs. 1 to 4 are designated by the same reference numerals and will not be described.

[0039] The fuse device 3 for cable connection training of the third embodiment of the present invention includes the fuse device 2 for cable connection training of the second embodiment and a self-supporting stand 60 for supporting the fuse device 2 for cable connection training, with the fuse device 2 for cable connection training being fixed to the stand 60.

[0040] The stand 60 is not particularly limited in structure, as long as it can stably support the fuse device 2 for cable connection training without falling over. A magnet or a suction cup may be attached to the bottom surface of the stand 60 to prevent it from falling over. The fuse device 2 for cable connection training may be detachably attached to the stand 60. The fuse device 3 for cable connection training is preferably of a size that can be placed on the floor surface 202 of the control panel 200 of the actual machine.

[0041] The method of using the fuse device 3 for cable connection training of the third embodiment is the same as the method of using the fuse devices for cable connection training of the first and second embodiments 1 and 2. In the fuse device 3 for cable connection training of the third embodiment, the base plate 50 supporting the fuse holder 10 is in an upright position, recreating a state closer to that of an actual device, and by using this, effective training can be carried out.

[0042] The above describes the fuse device for cable connection training of the present invention using the fuse devices 1, 2, and 3 for cable connection training of the first to third embodiments. However, the fuse device for cable connection training of the present invention is not limited to the present embodiments and can be modified within the scope that does not change the gist of the invention.

[0043] The fuse holder 10 shown in Figures 1 to 5 used to explain the fuse devices for cable connection training 1, 2, and 3 of the first to third embodiments has a flat upper cover 18, but in the fuse device for cable connection training according to the present invention, the fuse holder 10 is not limited to a specific shape or structure. Some fuse holders for main steam safety relief valves in nuclear power plants have a removal handle on the upper surface of the upper cover, a hole for inserting a cylindrical fuse on the back of the upper cover, and the upper cover and the fuse are integrated. Such fuse holders can also be suitably used in the fuse device for cable connection training according to the present invention.

[0044] In the fuse device for cable connection training of the above embodiment, the fuse holder 10 with the fuse 30 attached thereto is attached to the base plate 50, but it is also possible to attach only the fuse holder 10. Also, it is also possible to change a part of the device to only the fuse holder 10, and even in these cases, it is possible to carry out cable connection training similar to that of the above embodiment.

[0045] In the above embodiment, a fuse device for training in the opening operation of the main steam safety relief valve of a battery facility at a nuclear power plant has been described as the fuse device for cable connection training according to the present invention. However, the fuse device for cable connection training according to the present invention can also be used for other purposes and applications.

[0046] Although the preferred embodiment has been described with reference to the drawings, those skilled in the art will easily imagine various changes and modifications within the obvious scope upon reading the present specification. Therefore, such changes and modifications are interpreted as falling within the scope of the invention as defined by the claims. [Explanation of symbols]

[0047] 1, 2, 3 Fuse unit for cable connection training 10 Fuse holder 12 Case body 16 Label 20 clips 22 Terminal block 24 Screws 30. Fuse 50 Base plate 60 Stand 100 102, 105 Cable 200 Control Panel 202 Floor 210 Fuse holder

Claims

1. A fuse device for cable connection training that is placed on the floor of an existing control panel and used, A portable base plate and a fuse holder attached to the base plate, the fuse holder having a terminal block for connecting a cable and accommodating a fuse; An adsorption means capable of adsorbing to a floor surface of a control panel; A fuse device for cable connection training comprising:

2. 2. The fuse device for cable connection training according to claim 1, wherein the terminal block has a structure for fastening a cable with screws.

3. 3. The fuse device for cable connection training according to claim 1, wherein a dummy cable is connected to the terminal block.

4. Two or more of the fuse holders are attached in parallel to the base plate, 4. The fuse device for cable connection training according to claim 1, wherein each fuse holder is provided with a fuse number used in an existing control panel or a device number to which the fuse is connected.

5. 5. The fuse device for cable connection training according to claim 1, further comprising a self-supporting stand for holding the base plate in an upright position.

6. 6. The fuse device for cable connection training according to claim 1, wherein the fuse holder has the same structure and size as a fuse holder attached to an existing control panel.

7. A fuse device for cable connection training described in any one of claims 1 to 6, wherein the control panel is a control panel for a battery storage facility of a nuclear power plant.

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