Neutral point grounding resistor cabinet

Abstract

The utility model provides a neutral point grounding resistor cabinet which comprises a stainless steel outer box body and a resistor mechanism. A connecting port is formed in the stainless steel outer box body; the resistance mechanism is arranged in the stainless steel outer box body, and one end of the resistance mechanism extends to the connecting port of the stainless steel outer box body; the other end of the resistance mechanism is connected with the ground; wherein a power grid neutral point of the power equipment penetrates through the stainless steel outer box body through the connecting port to be connected with the resistor mechanism, when abnormal current occurs in the power equipment, the resistor mechanism adjusts the abnormal current and transmits the abnormal current to the ground to protect the power equipment, the stainless steel outer box body is used for protecting the resistor mechanism, and the protection effect is better than that of a common iron resistor cabinet box body. The problem that the resistor cabinet in the prior art is difficult to effectively protect internal resistors is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistor devices, in particular to a neutral point grounding resistor cabinet. Background Art

[0002] In 6-35kV AC power grid, the neutral point of the power grid may adopt ungrounded, arc-extinguishing coil grounding, large resistance grounding, medium resistance grounding, small resistance grounding and other grounding methods. In the cable power supply system, the grounding capacitance current is large. When the current is greater than the specified value, arc grounding overvoltage may be generated. The purpose of using resistance grounding is to inject resistive current into the fault point, so that the grounding fault current is of resistance-capacitance nature, reduce the phase difference angle with the voltage, reduce the restrike rate after the fault point current passes through zero arc extinguishing, and limit the overvoltage to within 2.6 times the phase voltage. At the same time, the sensitivity of relay protection is improved to act on tripping. Thereby effectively protecting the normal operation of the system; and the exterior of this set of equipment is usually set outdoors, so an external resistance cabinet is required to protect the equipment from damage such as rain and foreign objects, and the common resistance cabinet is usually composed of iron plates, and the protection performance of the iron box is mediocre. Utility Model Content

[0003] The main purpose of the utility model is to provide a neutral point grounding resistor cabinet, so as to at least solve the problem that the resistor cabinet in the prior art is difficult to effectively protect the internal resistor components.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a neutral point grounding resistor cabinet, including a stainless steel outer box and a resistor mechanism; a connection port is opened on the stainless steel outer box; the resistor mechanism is arranged in the stainless steel outer box, and one end of the resistor mechanism extends to the connection port of the stainless steel outer box; the other end of the resistor mechanism is connected to the ground; wherein, the neutral point of the power grid of the power equipment passes through the stainless steel outer box through the connection port and is connected to the resistor mechanism, when abnormal current appears in the power equipment, the resistor mechanism adjusts the abnormal current and transmits it to the ground to protect the power equipment, and the stainless steel outer box is used to protect the resistor mechanism.

[0005] Furthermore, the resistance mechanism includes a transformer assembly and a resistance protection assembly; the transformer assembly is connected to the neutral point of the power grid of the power equipment through a connection port; one end of the resistance protection assembly is connected to the transformer assembly, and the other end is connected to the ground; wherein, the transformer assembly is used to adjust the voltage of the abnormal current, and the resistance protection assembly is used to eliminate the arc generated by the abnormal current and transmit the regulated abnormal current to the ground to protect the power equipment.

[0006] Furthermore, the stainless steel outer box body also includes a rainproof cap; the rainproof cap is arranged on the top of the stainless steel outer box body, and rainwater flows to the ground through the rainproof cap.

[0007] Furthermore, the stainless steel outer box body also includes a heat dissipation port; there are multiple heat dissipation ports, and the multiple heat dissipation ports are all opened on the side wall of the stainless steel outer box body to discharge the heat in the stainless steel outer box body.

[0008] Furthermore, the material of the stainless steel outer box is 304 stainless steel.

[0009] The neutral point grounding resistor cabinet using the technical solution of the utility model comprises a stainless steel outer box and a resistor mechanism; a connection port is provided on the stainless steel outer box; the resistor mechanism is arranged in the stainless steel outer box, and one end of the resistor mechanism extends to the connection port of the stainless steel outer box; the other end of the resistor mechanism is connected to the ground; wherein, the neutral point of the power grid of the power equipment passes through the stainless steel outer box through the connection port and is connected to the resistor mechanism, when an abnormal current appears in the power equipment, the resistor mechanism adjusts the abnormal current and transmits it to the ground to protect the power equipment, and the stainless steel outer box is used to protect the resistor mechanism, which solves the problem that the resistor cabinet in the prior art is difficult to effectively protect the internal resistor components. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0011] Figure 1 It is a schematic diagram of the internal and external structure of a neutral point grounding resistor cabinet which can be selected according to an embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the external structure of a neutral point grounding resistor cabinet which can be selected according to an embodiment of the utility model;

[0013] The above drawings include the following reference numerals:

[0014] 10. Stainless steel outer box; 11. Connection port; 12. Rainproof cap; 13. Heat dissipation port; 20. Resistance mechanism; 21. Transformer assembly; 22. Resistance protection assembly. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0016] According to the neutral point grounding resistor cabinet of the utility model, Figure 1As shown, it includes a stainless steel outer box body 10 and a resistor mechanism 20; a connection port 11 is opened on the stainless steel outer box body 10; the resistor mechanism 20 is arranged in the stainless steel outer box body 10, and one end of the resistor mechanism 20 extends to the connection port 11 of the stainless steel outer box body 10; the other end of the resistor mechanism 20 is connected to the ground; wherein, the neutral point of the power grid of the power equipment passes through the stainless steel outer box body 10 through the connection port 11 and is connected to the resistor mechanism 20. When an abnormal current occurs in the power equipment, the resistor mechanism 20 adjusts the abnormal current and transmits it to the ground to protect the power equipment. The stainless steel outer box body 10 is used to protect the resistor mechanism 20. Different from the existing common iron resistor cabinet box body, stainless steel products have more advantages. On the one hand, they are harder and not easily deformed by external forces to affect internal components. There is no need to use thicker plates like iron resistor cabinet boxes, which effectively reduces the overall size of the resistor cabinet and saves space. On the other hand, stainless steel is more stable in special external environments, is not easily damaged by chemical substances, and has better all-weather protection effect.

[0017] When implementing it, Figure 1 As shown, the resistance mechanism 20 includes a transformer assembly 21 and a resistance protection assembly 22; the transformer assembly 21 is connected to the neutral point of the power grid of the power equipment through the connection port 11; one end of the resistance protection assembly 22 is connected to the transformer assembly 21, and the other end is connected to the ground; wherein, the transformer assembly 21 is used to adjust the voltage of the abnormal current, and the resistance protection assembly 22 is used to eliminate the arc generated by the abnormal current and transmit the adjusted abnormal current to the ground to protect the power equipment.

[0018] When implementing it, Figure 2 As shown, the stainless steel outer box body 10 also includes a rainproof cap 12; the rainproof cap 12 is arranged on the top of the stainless steel outer box body 10, and rainwater flows to the ground through the rainproof cap 12; in order to make the rainproof performance of the stainless steel outer box body 10 better, a rainproof cap 12 is arranged on the top of the stainless steel outer box body 10, and the surface area of ​​the rainproof cap 12 is larger than the upper surface area of ​​the stainless steel outer box body 10. When it rains, rainwater drips through the edge of the rainproof cap 12 and is not easy to contact the side wall of the stainless steel outer box body 10, thereby preventing rainwater from entering the stainless steel outer box body 10.

[0019] When implementing it, Figure 2 As shown, the stainless steel outer box 10 further includes a heat dissipation port 13; there are multiple heat dissipation ports 13, and the multiple heat dissipation ports 13 are all opened on the side wall of the stainless steel outer box 10 to discharge the heat in the stainless steel outer box 10, so that the internal components are in good operating condition.

[0020] When implementing it, Figure 2As shown, the material of the stainless steel outer box 10 is 304 stainless steel. 304 stainless steel has many characteristics. On the one hand, it has high hardness and can protect the internal components of the resistor cabinet as an outer box. On the other hand, 304 stainless steel has good corrosion resistance. For special outdoor environments, such as working environments near salt evaporation, the corrosion resistance of 304 stainless steel is much higher than that of iron. Therefore, using 304 stainless steel to make the outer box is more adaptable to a wider range of occasions and more stable.

[0021] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A neutral point grounding resistor cabinet, characterized in that: include: A stainless steel outer box (10), wherein a connection port (11) is provided on the stainless steel outer box (10); a resistance mechanism (20), the resistance mechanism (20) being arranged in the stainless steel outer box (10), one end of the resistance mechanism (20) extending to the connection port (11) of the stainless steel outer box (10); and the other end of the resistance mechanism (20) being connected to the ground; The neutral point of the power grid of the power equipment is connected to the resistance mechanism (20) through the connection port (11) through the stainless steel outer box (10); when an abnormal current occurs in the power equipment, the resistance mechanism (20) adjusts the abnormal current and transmits it to the ground to protect the power equipment; the stainless steel outer box (10) is used to protect the resistance mechanism (20).

2. The neutral point grounding resistor cabinet according to claim 1, characterized in that: The resistance mechanism (20) comprises: A transformer assembly (21), the transformer assembly (21) being connected to the neutral point of the power grid of the power equipment via the connection port (11); A resistor protection component (22), one end of the resistor protection component (22) is connected to the transformer component (21), and the other end is connected to the ground; The transformer component (21) is used to adjust the voltage of the abnormal current, and the resistor protection component (22) is used to eliminate the arc generated by the abnormal current and transmit the adjusted abnormal current to the ground to protect the power equipment.

3. The neutral point grounding resistor cabinet according to claim 1, characterized in that: The stainless steel outer box (10) further comprises: A rainproof cap (12) is arranged on the top of the stainless steel outer box (10), and rainwater flows to the ground through the rainproof cap (12).

4. The neutral point grounding resistor cabinet according to claim 1, characterized in that: The stainless steel outer box (10) further comprises: A heat dissipation port (13), wherein the heat dissipation port (13) is multiple and each of the multiple heat dissipation ports (13) is disposed on the side wall of the stainless steel outer box body (10) to discharge heat from the stainless steel outer box body (10).

5. The neutral point grounding resistor cabinet according to claim 1, characterized in that: The stainless steel outer box (10) is made of 304 stainless steel.

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