Test box button instruction holding device and circuit thereof

Abstract

The present application provides a test box button instruction holding device and its circuit. The circuit of the test box button instruction holding device includes a first circuit, which is provided with a first relay, a second relay contact and a first relay contact in sequence, and is connected between the closing circuit and the test position of the electrical switch cabinet; a second circuit, which is connected between the end of the second relay contact close to the first relay contact and the power supply of the electrical switch cabinet, and the closing button of the test box is connected between the second relay contact and the power supply; a third circuit, which is provided with a second relay and connected between the opening circuit and the power supply of the electrical switch cabinet, and the opening button of the test box is connected between the second relay and the power supply; and a fourth circuit, which is connected between the test box and the grounding wire of the electrical switch cabinet. The present application utilizes the test box button instruction holding device to be connected between the switch cabinet and the test box, thereby avoiding the risks of loose joints and accidental contact caused by the test box being hung on the switch cabinet.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical switch cabinet maintenance, and specifically relates to a test box button instruction holding device and a circuit thereof. Background Art

[0002] Nuclear power plant operations and post-maintenance testing of turnaround equipment require the operation of turnaround equipment. However, when the equipment is not online properly or the motor is disconnected from the pump or fan, protective shutdown instructions may be issued. This affects some 380V and 6.6kV electrical switches. One method involves using a test box on the electrical switchgear to initiate the operation and maintaining the button pressed and the test box inserted for an extended period. However, this method requires long wiring and the weight of the test box itself, resulting in a heavy and long overall length and risk of loose connections and accidental contact with other electrical switches. Furthermore, the electrical switchgear does not have a storage space for the test box, so the current practice is to temporarily attach it to the switchgear with tape. Another method involves using the instrumentation and control system to enforce the signal and lock the protective shutdown signal. However, this method carries the risk of time-consuming and labor-intensive coordination and human error during enforcement. Summary of the Invention

[0003] In view of this, an embodiment of the present application is dedicated to providing a test box button command holding device and its circuit, which are connected between the electrical switch cabinet and the test box through the test box button command holding device. The test box button command holding device is used to avoid the risk of loose joints and accidental contact with other electrical switches due to the test box being hung on the electrical switch cabinet for a long time.

[0004] In a first aspect, the present application provides a circuit for a test box button command retention device, the circuit comprising a first circuit, a second circuit, a third circuit, and a fourth circuit. The first circuit comprises a first relay, a second relay contact, and a first relay contact, and is configured to be connected between a closing circuit and a test position of an electrical switch cabinet. The first relay contact is a normally open contact. The second relay contact is a normally closed contact. The second circuit is configured to be connected between an end of the second relay contact proximal to the first relay contact and a power supply of the electrical switch cabinet. The closing button of the test box is configured to be connected between the second relay contact and the power supply. The third circuit comprises a second relay, and is configured to be connected between an opening circuit and the power supply of the electrical switch cabinet. The opening button of the test box is configured to be connected between the second relay and the power supply. The fourth circuit is configured to be connected between the test box and a ground wire of the electrical switch cabinet.

[0005] In the above scheme, the test box button instruction holding device is set to include the first circuit, the second circuit, the third circuit and the fourth circuit, and the first relay, the second relay contact and the first relay contact are set on the first circuit, and the second relay is set on the third circuit, so that when the test box is unplugged, the electrical switch cabinet can still maintain the test closing state, avoiding the situation of hanging the heavy test box on the electrical switch cabinet or sticking it to the electrical switch cabinet, and at the same time reducing the implementation of signal forcing, reducing possible errors such as signal forcing errors or missed recovery.

[0006] In one embodiment of the present application, the circuit of the test box button command holding device further includes a plurality of first plugs and a plurality of second sockets. The plurality of first plugs are configured to respectively connect to the plurality of first sockets on the electrical switch cabinet. The plurality of second sockets are configured to respectively connect to the plurality of second plugs on the test box.

[0007] A second aspect of the present application provides a test box button instruction holding device, which includes the circuit of the test box button instruction holding device of the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Shown is a circuit diagram of a test box button instruction holding device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0010] Figure 1 The figure shows a circuit diagram of a test box button instruction holding device provided by an embodiment of the present application. It should be noted that, Figure 1 The inner dotted box is the circuit diagram of the test box, the circuit diagram of the holding device is between the outer dotted box and the inner dotted box, and the electrical switch cabinet socket and control circuit are outside the outer dotted box.

[0011] like Figure 1As shown, the circuit of the test box button command holding device includes a first circuit, a second circuit, a third circuit, and a fourth circuit. The first circuit is sequentially provided with a first relay 11, a second relay contact 14, and a first relay contact 13. The first circuit is configured to be connected between the closing circuit of the electrical switch cabinet and the test position. The first relay contact 13 is a normally open contact. The second relay contact 14 is a normally closed contact. The second circuit is configured to be connected between the end of the second relay contact 14 closest to the first relay contact 13 and the power supply of the electrical switch cabinet. The closing button "ON" of the test box is configured to be connected between the second relay contact 14 and the power supply. The third circuit includes a second relay 12. The third circuit is configured to be connected between the opening circuit of the electrical switch cabinet and the power supply. The opening button "OFF" of the test box is configured to be connected between the second relay 12 and the power supply. The fourth circuit is configured to be connected between the test box and the ground wire of the electrical switch cabinet. In this way, when the test box starts the equipment, when the test box button presses the closing button "ON", the first relay 11 is energized and the first relay contact 13 is closed, so that the first relay 11, the first relay contact 13 and the second relay contact 14 on the first circuit are conductive. Even if the closing button "ON" on the test box is released, the equipment can still keep running, so that when the test box is unplugged, the electrical switch cabinet can still maintain the test closing state.

[0012] In addition, the simple structural design of the circuit of the holding device makes the weight of the holding device very light relative to the test box. Therefore, the holding device can be used so that when the test box is required to force the start of the equipment during operation activities and post-maintenance test activities, there is no need to hang the test box on the on-site electrical switch cabinet for a long time, avoiding the situation of hanging the heavier test box on the electrical switch cabinet or sticking it to the electrical switch cabinet, and also reducing the implementation of signal forcing, reducing possible errors such as signal forcing errors or missed recovery.

[0013] It should be noted that the first relay 11 may be relay 001XD, and the second relay 12 may be relay 002XD. The power supply may be a 110V DC control power supply.

[0014] In some embodiments, the first relay 11, the second relay contact 14, and the first relay contact 13 may form a holding circuit. When the first relay 11, the first relay contact 13, and the second relay contact 14 are conductive, the holding circuit remains open, and the closing circuits of the electrical switch cabinet and the test box remain open.

[0015] In at least one embodiment of the present application, the circuitry of the test box button command holding device includes multiple first plugs and multiple second sockets. The multiple first plugs are configured to connect to the multiple first sockets on the electrical switch cabinet, respectively. The multiple second sockets are configured to connect to the multiple second plugs on the test box, respectively. In this manner, when the holding device is used in conjunction with the test box, before the test box starts the device, the multiple first plugs (with pins inside, numbered 1-5 in the figure) of the holding device are inserted into the multiple first sockets (with sockets inside, numbered 1-5 in the figure) on the electrical switch cabinet. When the test box starts the device, the multiple second plugs (with pins inside, numbered 6-10 in the figure) of the test box are inserted into the multiple second sockets (with sockets inside, numbered 6-10 in the figure) of the holding device. When the test box stops the device, the multiple second plugs (with pins inside, numbered 6-10 in the figure) of the test box are inserted into the multiple second sockets (with sockets inside, numbered 6-10 in the figure) of the holding device. Then, the "OFF" button on the test box is pressed. The second relay 12 of the holding device is energized, the second relay contact 14 is separated, the first relay 11, the second relay contact 14 and the first relay contact 13 are not conductive, the first relay 11 is not energized, the first relay contact 13 is separated, the closing circuit of the electrical switch cabinet is not conductive, the opening circuit is conductive, the switch is opened, and the equipment is shut down.

[0016] It should be noted that the plurality of first plugs may constitute a connector, which may be connected to a socket of an electrical switch cabinet, and the plurality of second sockets may constitute another connector, which may be connected to a plug of a test box.

[0017] At least one embodiment of the present application further provides a device for retaining test box button commands. This device includes the circuitry of the device for retaining test box button commands described in the aforementioned embodiments of the present application. Because the device comprises only two relays with a single contact and two connectors, lightweight materials can be selected, resulting in a simple and lightweight device. Furthermore, because the device includes the circuitry of the device for retaining test box button commands described in the aforementioned embodiments, it can achieve the corresponding technical effects, which will not be further elaborated here.

[0018] It should be noted that, in addition to the circuit of the test box button instruction holding device in the above embodiment, the holding device may also include other structures such as a housing.

[0019] It should also be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments. All technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0020] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A circuit for a test box button instruction holding device, characterized in that: include: a first circuit, comprising a first relay, a second relay contact, and a first relay contact, configured to be connected between a closing circuit and a test position of an electrical switchgear, wherein the first relay contact is a normally open contact and the second relay contact is a normally closed contact; a second circuit configured to be connected between an end of the second relay contact proximal to the first relay contact and a power source of the electrical switchgear, wherein a closing button of the test box is configured to be connected between the second relay contact and the power source; a third circuit, provided with a second relay, configured to be connected between the opening circuit of the electrical switch cabinet and the power supply, wherein the opening button of the test box is configured to be connected between the second relay and the power supply; The fourth circuit is configured to be connected between the test box and a ground wire of the electrical switch cabinet.

2. The circuit according to claim 1, wherein: Also includes: a plurality of first plugs, configured to be connected to a plurality of first sockets on the electrical switch cabinet respectively; The plurality of second sockets are configured to be connected to the plurality of second plugs on the test box respectively.

3. A test box button instruction holding device, characterized in that: include: The circuit of the test box button instruction holding device as claimed in claim 1 or 2.

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