A slow start device for nuclear power equipment and a nuclear power cabinet

Abstract

The application discloses a slow start device for a nuclear power equipment and a nuclear power cabinet, the slow start device comprising a slow start switch, a support frame and a buffer assembly, the slow start switch being arranged on a stand column at the front end of the cabinet; the support frame being fixed to a mounting plate close to the slow start switch and the rear side of the support frame being matched with the mounting plate to form a wiring channel extending along the height direction of the cabinet; the buffer assembly comprising a connecting piece, a diode and a buffer resistor, the connecting piece being located in the wiring channel and having connecting portions at both ends thereof extending out of the wiring channel and being adapted to be detachably fixed to the mounting plate, the diode and the buffer resistor being arranged on the connecting piece; the diode, the buffer resistor and the slow start switch being sequentially connected by cables to form a slow start module, both ends of the slow start module being connected to the input end and the output end of a circuit breaker by cables. The nuclear power cabinet adopts the slow start device. The slow start device and the nuclear power cabinet are easy to maintain, convenient to wire and small in occupied area.

Description

Technical Field

[0001] This invention relates to the field of uninterruptible power supply technology, specifically to a soft-start device for nuclear power equipment and a nuclear power cabinet. Background Technology

[0002] In power conversion circuits, capacitors are typically used as filtering and energy storage devices. When switch S1 between the power conversion circuit and the power supply is closed, the capacitor is effectively short-circuited, generating a large instantaneous current that can damage the components in the power conversion circuit. To address this issue, existing technologies usually add a buffer circuit on the input side of the power conversion circuit to pre-charge the capacitor, thus buffering its operation. The buffer circuit typically includes a series-connected switch S2, a buffer resistor, and a diode. When the power supply is in operation, switch S2 is closed first, allowing the power supply to charge the capacitor through the buffer circuit. When the difference between the capacitor voltage and the power supply input voltage is small, switch S1 is closed, and switch S2 is opened, thus avoiding the large inrush current during power supply startup. However, in uninterruptible power supply (UPS) cabinets, due to limited space, the components of the buffer circuit are often dispersive, making wiring inconvenient, consuming a large area, and difficult to maintain. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the prior art and to provide a soft-start device for nuclear power equipment that is easy to maintain, convenient to wire, and occupies a small area.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In technical solution one, a soft-start device for nuclear power equipment is provided for pre-charging the capacitors in the power conversion circuit of the nuclear power equipment. The nuclear power equipment has a cabinet, the front end of which forms a baffle. The cabinet also has a mounting plate parallel to and opposite to the baffle at the rear end of the baffle. The mounting plate is equipped with operating components for the nuclear power equipment and a circuit breaker between the power conversion circuit and the power supply of the nuclear power equipment. The operating ends of the operating components and the circuit breaker are exposed above the baffle. The soft-start device includes a soft-start switch, a support frame, and a buffer assembly. The soft-start switch is mounted on a column at the front end of the cabinet, and its input and output ends are arranged along the height of the cabinet, with its operating end exposed above the baffle. The support frame is located near... The soft-start switch is fixed to the mounting plate and cooperates with the mounting plate to form a wiring channel extending along the height direction of the cabinet; the buffer assembly includes a connector, a diode, and a buffer resistor. The connector is located in the wiring channel and has connecting parts at both ends that extend out of the wiring channel and are adapted to be detachably fixed to the mounting plate. The diode and the buffer resistor are mounted on the connector. The circuit breaker is supported on the front surface of the support frame so that its operating end is exposed on the baffle. Its input and output ends are arranged along the height direction of the cabinet. The diode, the buffer resistor, and the soft-start switch are connected in series with cables to form a soft-start module. The two ends of the soft-start module are respectively connected to the input and output ends of the circuit breaker with cables.

[0006] Based on technical solution one, there is also technical solution two. In technical solution two, the soft start switch and the buffer assembly are arranged along the height direction of the cabinet; the diode and the buffer resistor are arranged along the height direction of the cabinet.

[0007] Based on technical solution two, there is also technical solution three, in which the support frame is provided with a first cable tie hole along the height direction of the cabinet.

[0008] Based on technical solution three, there is also technical solution four. In technical solution four, the support frame is provided with a receiving groove with an opening facing the mounting plate. The receiving groove extends and passes through along the height direction of the cabinet. The first wire binding hole is provided on the side wall of the receiving groove. The support frame is provided with mounting walls facing each other at the free end of the receiving groove wall, which are suitable for attaching and fixing to the mounting plate.

[0009] Based on technical solution two, technical solution five is also provided. In technical solution five, the soft-start switch is located above the buffer assembly; the diode is a rectifier bridge diode and is located above the buffer resistor; the buffer resistor includes a first resistor and a second resistor connected in parallel, the first resistor and the second resistor being arranged along the width direction of the cabinet; the input and output terminals of the soft-start switch are located at its upper and lower ends respectively and each has two wiring ports; the input terminal of the circuit breaker is located at its lower end and has two wiring ports, and its output terminal is located at its upper end and has two wiring ports; the diode and the buffer resistor are connected by a cable, the diode and one wiring port of the circuit breaker's output terminal are connected by a cable, the buffer resistor and one wiring port of the soft-start switch's output terminal are connected by a cable; the other wiring port of the soft-start switch's output terminal is connected by a cable to the other wiring port of the circuit breaker's output terminal; the two wiring ports of the soft-start switch's input terminal are respectively connected to the two wiring ports of the circuit breaker's input terminal by cables.

[0010] Based on technical solution five, technical solution six is ​​also provided. In technical solution six, the connector has a groove with an opening facing the mounting plate. The groove extends along the width direction of the cabinet. The connector has connecting walls at the free ends of the groove walls that are far apart from each other, which are suitable for attaching and fixing to the mounting plate. The connecting walls form the connecting part. The diode and the buffer resistor are fixed to the bottom wall of the groove away from the opening of the groove.

[0011] Based on technical solution six, technical solution seven is also provided. In technical solution seven, a plurality of second cable ties are arranged on the bottom wall of the groove along the height direction of the cabinet; the second cable ties are close to the soft start switch.

[0012] Based on technical solution one, there is also technical solution eight, which further includes a fixing component; the fixing component extends along the width direction of the cabinet, one end of which is fixed to the rear surface of the column, and the other end extends out of the column and is provided with a mounting part, and the soft start switch is embedded in the mounting part.

[0013] Based on technical solution one, there is also technical solution nine, in which the projection of the circuit breaker along the front-back direction covers the support frame.

[0014] Technical Solution 10: The present invention also provides a nuclear power cabinet, which adopts a soft-start device for nuclear power equipment as described in any one of Technical Solutions 1 to 9.

[0015] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In technical solution one, the distance between the mounting plate and the baffle is determined by the electrical components on the mounting plate. Since the operating components of nuclear power equipment are often large, a significant distance is formed between the mounting plate and the baffle. In this technical solution, the circuit breaker is fixed to the mounting plate via a support frame, allowing its operating end to be exposed above the baffle. Therefore, there is a large space between the support frame and the mounting plate. In this solution, a wiring channel extending along the height of the cabinet is formed between the support frame and the mounting plate. The buffer assembly can be placed within this wiring channel, thus avoiding the need to occupy other space on the cabinet surface for installation. The layout is reasonable and ingenious, and the cables of the buffer assembly, soft-start switch, and circuit breaker are hidden within the wiring channel, resulting in a more aesthetically pleasing design. Furthermore, the buffer assembly and the circuit breaker... The soft-start switch is easy to wire. When the buffer assembly needs maintenance, after removing the baffle, only the two connecting parts of the connector need to be disassembled. Then, the connecting cables between the buffer assembly and the soft-start switch and the circuit breaker can be disconnected. The entire buffer assembly can then be taken out along the height of the cabinet. After the buffer assembly is replaced, it is inserted into the wiring channel along the height of the cabinet, and the connecting parts are fixed to the mounting plate. The maintenance of the buffer assembly is relatively convenient. The soft-start switch, due to its small size, is installed on the column. The circuit breaker, due to its large size, also needs to be connected to an external power source and requires a copper busbar. It is installed at the front of the support frame. The layout is reasonable, and both the soft-start switch and the circuit breaker face forward, with the operating ends exposed on the baffle for easy operation.

[0017] 2. In technical solution two, the soft-start switch and buffer assembly are arranged along the height of the cabinet, and the diodes and buffer resistors are arranged along the height of the cabinet to facilitate wiring.

[0018] 3. In technical solution three, the support frame is provided with a first cable tie hole, so that the cables of the buffer assembly, circuit breaker and soft start switch can be fixed by cable ties, making them more tidy.

[0019] 4. In technical solution four, the support frame has a simple and practical structure, and the overall strength of the support frame is increased, making the installation structure stable; the two mounting walls are set facing each other, so that the connection structure between the support frame and the mounting plate is hidden in the wiring channel, which is more aesthetically pleasing.

[0020] 5. In technical solution five, the layout of each electrical component allows the cables to pass through the wiring channel, which is more aesthetically pleasing; when the buffer assembly needs to be disassembled, only two cables need to be disassembled, which is convenient for maintenance; the diodes are rectifier bridge diodes, which are smaller in size, lower in cost, and easier to wire; the buffer resistors include a first resistor and a second resistor connected in parallel, which are arranged along the width of the cabinet, which facilitates heat dissipation and can meet various power requirements.

[0021] 6. In technical solution six, the structural design of the connector increases its strength, making the structure of the buffer assembly stable after installation; the design of the second wire ties facilitates the fixing of the cable between the buffer resistor and the rectifier bridge diode, and prevents other cables from getting tangled, making maintenance more convenient.

[0022] 7. In technical solution seven, the second wire-binding hole is close to the soft-start switch, so that a wiring space is formed in front of the second wire-binding hole, which facilitates the wiring of the buffer assembly, circuit breaker and soft-start switch.

[0023] 8. In technical solution eight, the structure of the fastener facilitates the installation of the soft-start switch, and its fixed connection to the rear surface of the column is more aesthetically pleasing.

[0024] 9. In technical solution nine, the circuit breaker's projection along the front and rear directions covers the support frame, so that the buffer assembly is basically located in the operator's blind spot, which is more aesthetically pleasing.

[0025] 10. In technical solution ten, the present invention also provides a nuclear power cabinet, which adopts the soft start device in the above technical solution and has the same technical advantages as the above technical solution. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a circuit diagram of the soft-start device according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the soft-start device installed on the cabinet according to an embodiment of the present invention;

[0029] Figure 3 for Figure 2 A diagram showing the area after the cover is hidden;

[0030] Figure 4 for Figure 2 A schematic diagram showing other electrical components hidden on the mounting plate;

[0031] Figure 5 This is a schematic diagram of the soft-start switch and fixing component according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the soft-start device according to an embodiment of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of the decomposition process;

[0034] Figure 8 This is a schematic diagram of the buffer component according to an embodiment of the present invention;

[0035] Explanation of key figure labels:

[0036] Cabinet 100; baffle 101; mounting plate 102; operating component 103; column 104; soft start switch 10; fixing component 20; mounting part 21; support frame 30; receiving groove 31; first cable tie hole 311; mounting wall 32; circuit breaker 40; input copper busbar 41; output copper busbar 42; buffer assembly 50; connector 51; groove 511; second cable tie hole 5111; connecting wall 512; diode 52; buffer resistor 53; first resistor 531; second resistor 532. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0039] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0040] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0041] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0042] See Figure 1-8 , Figure 1 A buffer circuit according to an embodiment of the present invention is shown. Figure 2-8 A soft-start device for nuclear power equipment is shown, used to precharge the capacitors in the power conversion circuit of the nuclear power equipment. The nuclear power equipment has a cabinet 100, with a baffle 101 formed at the front end of the cabinet 100. The cabinet 100 also has a mounting plate 102 at the rear end of the baffle 101, which is parallel to and opposite to the baffle 101. The mounting plate 102 is equipped with an operating component 103 for the nuclear power equipment and a circuit breaker 40 located between the power conversion circuit and the power supply of the nuclear power equipment. In this embodiment, the operating component 103 is a switching switch for switching between the UPS main circuit and the bypass circuit. The operating ends of the operating component 103 and the circuit breaker 40 are exposed on the baffle 101. The distance between the mounting plate 102 and the baffle 101 is determined by the electrical components on the mounting plate 102. Due to the large size of the switching switch, a large distance is also formed between the mounting plate 102 and the baffle 101.

[0043] The soft-start device includes a soft-start switch 10, a fixing component 20, a support frame 30, and a buffer assembly 50.

[0044] The soft-start switch 10 is mounted on the upright 104 at the front of the cabinet 100, with its input and output terminals arranged along the height of the cabinet 100, and its operating terminal exposed on the baffle 101; see also Figure 4-5 The soft-start switch 10 is mounted on the column 104 via a fixing member 20. Specifically, the fixing member 20 extends along the width direction of the cabinet 100, with one end fixed to the rear surface of the column 104 for a more aesthetically pleasing appearance, and the other end extending out of the column 104 and having a mounting part 21, in which the soft-start switch 10 is embedded. In this embodiment, the input and output ends of the soft-start switch 10 are located at its upper and lower ends, respectively, and each has two wiring ports.

[0045] See also Figure 3 The support frame 30 is fixed to the mounting plate 102 near the soft start switch 10, and its rear side cooperates with the mounting plate 102 to form a wiring channel extending along the height direction of the cabinet 100; in order to facilitate the fixing of cables, the support frame 30 is provided with a first cable tie hole 311 along the height direction of the cabinet 100.

[0046] See Figure 7 The support frame 30 is provided with a receiving groove 31 with an opening facing the mounting plate 102. The receiving groove 31 extends and passes through the height of the cabinet 100. A first cable tie hole 311 is provided on the side wall of the receiving groove 31. Figure 8In the accommodating groove 31, two first wire binding holes 311 are evenly distributed on the two side walls of the groove, and the two first wire binding holes 311 are respectively close to the upper and lower ends of the support frame 30; the support frame 30 has mounting walls 32 facing each other at the free ends of the groove wall of the accommodating groove 31, which are suitable for attaching and fixing to the mounting plate 102. The structure of the support frame 30 is simple and practical, and it increases the overall strength of the support frame 30, making the installation structure stable; the two mounting walls 32 are arranged facing each other, so that the connection structure between the support frame 30 and the mounting plate 102 is hidden in the wiring channel, which is more aesthetically pleasing.

[0047] See Figure 2-3 The circuit breaker 40 is fixed to the front side of the support frame 30 so that its operating end is exposed above the baffle 101. Its input and output ends are arranged along the height of the cabinet 100. The input end of the circuit breaker 40 is located at its lower end and has two wiring ports, while its output end is located at its upper end and also has two wiring ports. (See also...) Figure 6-7 The circuit breaker 40 has an input copper busbar 41 and an output copper busbar 42 connected to its input and output terminals, respectively. The input and output copper busbars 41 and 42 are equipped with connection terminals, which form the wiring ports for the input and output terminals of the circuit breaker 40. The arrangement of the input and output copper busbars 41 and 42 of the circuit breaker 40 facilitates wiring to external power supplies and power conversion circuits, as well as to the soft-start switch 10 and the buffer assembly 50.

[0048] The buffer assembly 50 includes a connector 51, a diode 52, and a buffer resistor 53. The connector 51 is located within the wiring channel and has connecting portions at both ends extending out of the wiring channel, suitable for detachable fixing to the mounting plate 102. The diode 52 and the buffer resistor 53 are mounted on the connector 51. The diode 52, the buffer resistor 53, and the soft-start switch 10 are connected in series via cables to form a soft-start module. The two ends of the soft-start module are connected to the input and output terminals of the circuit breaker 40 via cables, respectively.

[0049] In specific implementation, the soft-start switch 10 and the buffer assembly 50 are arranged along the height direction of the cabinet 100; the diode 52 and the buffer resistor 53 are arranged along the height direction of the cabinet 100. In this embodiment, the soft-start switch 10 is located above the buffer assembly 50; the diode 52 is a rectifier bridge diode 52 and is located above the buffer resistor 53; the buffer resistor 53 includes a first resistor 531 and a second resistor 532 connected in parallel, and the first resistor 531 and the second resistor 532 are arranged along the width direction of the cabinet 100.

[0050] The rectifier bridge diode 52 and the buffer resistor 53 are connected by a first cable, and the rectifier bridge diode 52 is connected to a terminal of the output of the circuit breaker 40 by a second cable. The buffer resistor 53 is connected to the soft-start switch 10 (for...). Figure 1One terminal of the output of S2) is connected via a third cable; the other terminal of the output of the soft-start switch 10 is connected to the circuit breaker 40 (for... Figure 1 The other terminal of the output of S1) is connected via a fourth cable; the two terminals of the input of the soft start switch 10 are connected to the two terminals of the input of the circuit breaker 40 via a fifth cable and a sixth cable, respectively.

[0051] Therefore, the wiring of the entire soft-start device is relatively convenient, and the layout of each electrical component allows the cables to pass through the wiring channel, which is more aesthetically pleasing. When the buffer assembly 50 needs to be disassembled, only two cables need to be disconnected, which is convenient for maintenance. The diode 52 is a rectifier bridge diode 52, which is smaller in size, lower in cost, and easier to wire. The buffer resistor 53 includes a first resistor 531 and a second resistor 532 connected in parallel. The first resistor 531 and the second resistor 532 are arranged along the width of the cabinet 100, which is convenient for heat dissipation and can meet various power requirements.

[0052] See Figure 8 The connector 51 has a groove 511 with an opening facing the mounting plate 102. The groove 511 extends along the width direction of the cabinet 100. Connecting walls 512, suitable for attachment and fixation to the mounting plate 102, are provided at the free ends of the groove walls of the connector 511, forming a connecting portion. The buffer resistor 53 is fixed to the bottom wall of the groove 511 away from the opening. A plurality of second cable tie holes 5111 are arranged on the bottom wall of the groove 511 along the height direction of the cabinet 100. Figure 7-8 In the middle, the rectifier bridge diode 52 and the buffer resistor 53 are set on the side close to the connector 51, and the second wire tying hole 5111 is arranged on the side close to the soft start switch 10, so that a wiring space is formed in front of the second wire tying hole 5111, which facilitates the wiring of the buffer assembly 50 with the circuit breaker 40 and the soft start switch 10; the structural design of the connector 51 increases its strength, so that the buffer assembly 50 is structurally stable after installation.

[0053] In this embodiment, preferably, the projection of the circuit breaker 40 along the front-to-back direction covers the support frame 30, so that the buffer assembly 50 is basically located in the operator's blind spot, which is more aesthetically pleasing.

[0054] As can be seen, with this technical solution, the circuit breaker 40 is fixed to the mounting plate 102 via the support frame 30, thus exposing its operating end to the baffle 101. Consequently, there is a large space between the support frame 30 and the mounting plate 102. In this solution, a wiring channel extending along the height of the cabinet 100 is formed between the support frame 30 and the mounting plate 102, allowing the buffer assembly 50 to be placed within the wiring channel. This eliminates the need to occupy other space on the surface of the cabinet 100 for the installation of the buffer assembly 50. The layout is reasonable and ingenious, and it also allows the buffer assembly 50 to be installed without occupying other space on the surface of the cabinet 100. The cables (first cable, third cable, fifth cable and sixth cable) of switch 10 and circuit breaker 40 are hidden in the wiring channel, which is more aesthetically pleasing and makes the wiring of buffer assembly 50 to circuit breaker 40 and soft start switch 10 convenient. The first cable tie hole 311 can fix the cables (fifth cable and sixth cable) at the input end of soft start switch 10 and circuit breaker 40, and the second cable tie hole 5111 can fix the cables (first cable) of rectifier bridge diode 52 and buffer resistor 53, which is neat and beautiful and avoids cable tangling.

[0055] When maintenance of the buffer assembly 50 is required, after disassembling the baffle 101, only the two connecting parts of the connector 51 need to be disassembled, and then the connecting cables between the buffer assembly 50 and the soft start switch 10 and the circuit breaker 40 can be disconnected. The entire buffer assembly 50 can then be removed along the height direction of the cabinet 100. After the buffer assembly 50 is replaced, it is inserted into the wiring channel along the height direction of the cabinet 100, and the connecting parts are fixed to the mounting plate 102. Maintenance of the buffer assembly 50 is relatively convenient. Among them, the soft start switch 10, due to its small size, is set on the column 104, while the circuit breaker 40, due to its large size and the need to be electrically connected to an external power source, is set at the front end of the support frame 30. The layout is reasonable, and both the soft start switch 10 and the circuit breaker 40 are set forward, and the operating ends can be exposed on the baffle 101, which is convenient for operation.

[0056] The present invention also provides a nuclear power cabinet that adopts the soft start device of the above embodiment and has the same technical advantages as the above embodiment, which will not be repeated here.

[0057] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A soft-start device for a nuclear power plant, used for pre-charging capacitors in the power conversion circuit of the nuclear power plant, the nuclear power plant having a cabinet (100), a baffle (101) forming the front end of the cabinet (100), and a mounting plate (102) parallel to and opposite to the baffle (101) at the rear end of the cabinet (100), the mounting plate (102) being equipped with an operating element (103) for the nuclear power plant and a circuit breaker (40) disposed between the power conversion circuit and the power supply of the nuclear power plant, the operating ends of the operating element (103) and the circuit breaker (40) being exposed above the baffle (101), characterized in that, The soft-start device includes a soft-start switch (10), a support frame (30), and a buffer assembly (50); The soft-start switch (10) is installed on the column (104) at the front end of the cabinet (100), and its input and output ends are arranged along the height direction of the cabinet (100), and its operating end is exposed on the baffle (101). The support frame (30) is fixed to the mounting plate (102) near the soft start switch (10) and cooperates with the mounting plate (102) to form a wiring channel extending along the height direction of the cabinet (100); The buffer assembly (50) includes a connector (51), a diode (52) and a buffer resistor (53). The connector (51) is located in the wiring channel and has connection portions at both ends that extend out of the wiring channel and are adapted to be detachably fixed to the mounting plate (102). The diode (52) and the buffer resistor (53) are mounted on the connector (51). The circuit breaker (40) is supported on the front surface of the support frame (30) so that its operating end is exposed on the baffle (101), and its input and output ends are arranged along the height direction of the cabinet (100). The diode (52), buffer resistor (53) and soft-start switch (10) are connected in series by a cable to form a soft-start module. The two ends of the soft-start module are connected to the input and output ends of the circuit breaker (40) by a cable, respectively.

2. The soft-start device for nuclear power equipment as described in claim 1, characterized in that, The soft-start switch (10) and the buffer assembly (50) are arranged along the height direction of the cabinet (100); the diode (52) and the buffer resistor (53) are arranged along the height direction of the cabinet (100).

3. A soft-start device for nuclear power equipment as described in claim 2, characterized in that, The support frame (30) is provided with a first cable tie hole (311) along the height direction of the cabinet (100).

4. A soft-start device for nuclear power equipment as described in claim 3, characterized in that, The support frame (30) is provided with a receiving groove (31) with an opening facing the mounting plate (102). The receiving groove (31) extends and passes through the height direction of the cabinet (100). The first wire binding hole (311) is provided on the groove side wall of the receiving groove (31). The support frame (30) is provided with mounting walls (32) facing each other at the free end of the groove wall of the receiving groove (31), which are suitable for attaching and fixing to the mounting plate (102).

5. A soft-start device for nuclear power equipment as described in claim 2, characterized in that, The soft-start switch (10) is located above the buffer assembly (50); The diode (52) is a rectifier bridge diode and is located above the buffer resistor (53); The buffer resistor (53) includes a first resistor (531) and a second resistor (532) connected in parallel, and the first resistor (531) and the second resistor (532) are arranged along the width direction of the cabinet (100). The input and output terminals of the soft-start switch (10) are located at its upper and lower ends respectively and are provided with two wiring ports respectively; the input terminal of the circuit breaker (40) is located at its lower end and is provided with two wiring ports, and its output terminal is located at its upper end and is provided with two wiring ports respectively. The diode (52) and the buffer resistor (53) are connected by a cable. The diode (52) is connected by a cable to one terminal of the output end of the circuit breaker (40). The buffer resistor (53) is connected by a cable to one terminal of the output end of the soft start switch (10). The other terminal of the output end of the soft start switch (10) is connected by a cable to the other terminal of the output end of the circuit breaker (40). The two terminals of the input end of the soft start switch (10) are respectively connected by cables to the two terminals of the input end of the circuit breaker (40).

6. A soft-start device for nuclear power equipment as described in claim 5, characterized in that, The connector (51) has a groove (511) with an opening facing the mounting plate (102). The groove (511) extends along the width direction of the cabinet (100). The connector (51) has a connecting wall (512) at the free end of the groove wall of the groove (511) that is far apart from each other. The connecting wall (512) forms the connecting part. The diode (52) and the buffer resistor (53) are fixed to the bottom wall of the groove (511) away from the opening of the groove (511).

7. A soft-start device for nuclear power equipment as described in claim 6, characterized in that, The groove (511) has a plurality of second cable tie holes (5111) arranged along the height direction of the cabinet (100) on the bottom wall of the groove (511); the second cable tie holes (5111) are close to the soft start switch (10).

8. A soft-start device for nuclear power equipment as described in claim 1, characterized in that, It also includes a fastener (20); the fastener (20) extends along the width direction of the cabinet (100), one end of which is fixed to the rear surface of the column (104), and the other end extends out of the column (104) and is provided with a mounting part (21), and the soft start switch (10) is embedded in the mounting part (21).

9. A soft-start device for nuclear power equipment as described in claim 1, characterized in that, The circuit breaker (40) projects along the front-to-back direction onto the support frame (30).

10. A nuclear power cabinet, characterized in that, It employs a soft-start device for nuclear power equipment as described in any one of claims 1-9.

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