Vacuum circuit breaker for outdoor high-salt-fog environment

Abstract

The utility model relates to a circuit breaker, in particular to a vacuum circuit breaker for an outdoor high-salt-fog environment. The vacuum circuit breaker used in the outdoor high-salt-fog environment comprises a support, a rack is installed on the support, three sets of porcelain bushings are installed above the rack, an operation box is connected below the rack, and a CT19 spring operation mechanism is arranged in the operation box, and is characterized in that a lower wire outlet terminal and an upper wire outlet terminal are installed on the porcelain bushings, and a top cover is installed above the upper wire outlet terminal; an electronic moisture-proof box is arranged on the outer side of the operation box, baking varnish layers are arranged on the outer circumferential face and the crimping face of the upper wire outlet terminal, baking varnish layers are arranged on the outer circumferential face of the lower wire outlet terminal, and baking varnish layers are arranged on the upper end face and the outer circumferential face of the top cover. The utility model has the beneficial effects that the corrosion insulation problem of the circuit breaker in high salt mist and high humidity environments such as offshore wind power mainly using new energy such as wind power, photovoltaic and the like can be efficiently, reliably and thoroughly solved.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, and more particularly to a vacuum circuit breaker for outdoor high salt spray environments. Background Technology

[0002] The ZW17-40.5 series outdoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz outdoor high-voltage switchgear. It utilizes an outdoor vacuum interrupter and new insulation materials, making it suitable for use in power transmission and transformation systems for switching load currents, overload currents, and short-circuit currents. It boasts advantages such as safety, reliability, and long service life. However, with rapid economic development, users' requirements for power supply reliability and quality are increasingly stringent. In wind power generation areas or economically developed southeastern coastal regions, high humidity and salt content create a high-salt-spray, high-humidity environment, easily leading to severe salt contamination of high-voltage circuit breaker components. This causes intermittent spark discharge and insulation aging on the product surface, resulting in large-scale power outages. Therefore, effective and feasible solutions must be adopted to thoroughly address the insulation problems of vacuum high-voltage circuit breakers in salt-spray environments. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a vacuum circuit breaker for outdoor high salt spray environments.

[0004] This utility model is achieved through the following technical solution:

[0005] A vacuum circuit breaker for outdoor high salt spray environments includes a bracket, a frame mounted on the bracket, three sets of porcelain bushings mounted on the top of the frame, and an operating box connected to the bottom of the frame. The operating box contains a CT19 spring operating mechanism. The circuit breaker is characterized in that: a lower outgoing terminal and an upper outgoing terminal are mounted on the porcelain bushings; a top cover is mounted above the upper outgoing terminal; an electronic dehumidifier is located on the outside of the operating box; a baked enamel layer is provided on the outer circumferential surface and crimping surface of the upper outgoing terminal; a baked enamel layer is provided on the outer circumferential surface of the lower outgoing terminal; and a baked enamel layer is provided on the upper end surface and outer circumferential surface of the top cover.

[0006] The upper and lower surfaces of the upper outgoing terminal are respectively provided with tin-plated layers.

[0007] The upper and lower end faces of the lower output terminal are respectively provided with silver plating.

[0008] The control box is equipped with secondary wiring terminals.

[0009] The beneficial effects of this utility model are: it can efficiently, reliably, and thoroughly solve the problem of circuit breaker corrosion and insulation in high-salt-spray and high-humidity environments such as offshore wind power, which is mainly based on new energy sources such as wind power and photovoltaics. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings.

[0011] Appendix Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Appendix Figure 2 This is a side view of the structure of this utility model;

[0013] Appendix Figure 3 This is a top view of the top-outgoing terminal structure of this utility model;

[0014] Appendix Figure 4 This is a side view of the upper outgoing terminal structure of this utility model;

[0015] Appendix Figure 5 This is a top view of the bottom lead-out terminal structure of this utility model;

[0016] Appendix Figure 6 This is a side view of the lower outgoing terminal structure of this utility model;

[0017] Appendix Figure 7 This is a schematic diagram of the top cover structure of this utility model;

[0018] In the diagram, 1 is the bracket, 2 is the frame, 3 is the ceramic sleeve, 4 is the control box, 5 is the CT19 spring operating mechanism, 6 is the lower cable outlet terminal, 7 is the upper cable outlet terminal, 8 is the top cover, 9 is the electronic dehumidifier, 10 is the paint layer, 11 is the tin-plated layer, 12 is the silver-plated layer, and 13 is the secondary wiring terminal. Detailed Implementation

[0019] The attached figure shows a specific embodiment of this utility model. This embodiment includes a bracket 1, a frame 2 mounted on the bracket 1, three sets of ceramic sleeves 3 mounted above the frame 2, and an operation box 4 connected below the frame 2. The operation box 4 contains a CT19 spring operating mechanism 5. A lower lead-out terminal 6 and an upper lead-out terminal 7 are mounted on the ceramic sleeves 3. A top cover 8 is mounted above the upper lead-out terminal 7. An electronic dehumidifier box 9 is located on the outside of the operation box 4. The outer circumference and pressing surface of the upper lead-out terminal 7 are coated with a baking paint layer 10. The outer circumference of the lower lead-out terminal 6 is coated with a baking paint layer 10. The upper end face and outer circumference of the top cover 8 are coated with a baking paint layer 10. The upper and lower outer surfaces of the upper lead-out terminal 7 are respectively coated with a tin-plated layer 11. The upper and lower outer surfaces of the lower lead-out terminal 6 are respectively coated with a silver-plated layer 12. A secondary wiring terminal 13 is located inside the operation box 4.

[0020] The outdoor high-salt-spray environment vacuum circuit breaker of this utility model uses a CT19 spring operating mechanism 5. All galvanized parts are made of zinc-nickel alloy, with the nickel plating providing wear resistance, corrosion resistance, and rust prevention. The mechanism box 4 is made of 316L stainless steel, which contains molybdenum, resulting in better corrosion resistance and improved acid and alkali resistance. Adding an electronic dehumidifier box 9 provides long-term rust and corrosion prevention without affecting the product's insulation. The crimping surfaces of the upper and lower terminals 7 and 6 are protected. The outer circumference and crimping surface of the upper and lower terminals 7 are coated with a baking paint layer 10, as are the outer circumference of the lower terminals 6 and the top and outer circumference of the top cover 8. The upper and lower outer surfaces of the upper and lower terminals 7 and 6 are coated with a tin-plated layer 11, and the upper and lower outer surfaces of the lower terminals 6 are coated with a silver-plated layer 12. Protecting all surfaces of the upper and lower terminals 7 and 6, as well as the top cover 8, provides complete corrosion protection. The galvanized layer appearance of bracket 1 and frame 2 must meet the requirements of continuous integrity of the galvanized layer surface and be practically smooth. It should not have defects harmful to use, such as excessive pickling, peeling, incomplete galvanizing, nodules, zinc buildup, and sharp spots. The single-point measurement value of the galvanized layer thickness must be greater than 70μm, and the average thickness greater than 85μm. Each piece must be measured at no fewer than 12 points. All secondary wiring terminals 13 in control box 4 must be copper terminals. Secondary components in control box 4 must be treated for moisture resistance, salt spray resistance, and mildew resistance. Relays and contactors use copper connecting bolts and clamps.

Claims

1. A vacuum circuit breaker for outdoor high salt spray environments, comprising a bracket (1), a frame (2) mounted on the bracket (1), three sets of porcelain bushings (3) mounted on the top of the frame (2), and an operating box (4) connected to the bottom of the frame (2), wherein the operating box (4) is provided with a CT19 spring operating mechanism (5), characterized in that: The ceramic sleeve (3) is equipped with a lower output terminal (6) and an upper output terminal (7). A top cover (8) is installed above the upper output terminal (7). An electronic dehumidifier (9) is provided on the outside of the operation box (4). A baking paint layer (10) is provided on the outer circumference and pressing surface of the upper output terminal (7). A baking paint layer (10) is provided on the outer circumference of the lower output terminal (6). A baking paint layer (10) is provided on the upper end surface and outer circumference of the top cover (8).

2. The vacuum circuit breaker for outdoor high salt spray environments according to claim 1, characterized in that: The upper and lower surfaces of the upper outgoing terminal (7) are respectively provided with tin-plated layers (11).

3. The vacuum circuit breaker for outdoor high salt spray environments according to claim 1, characterized in that: The lower output terminal (6) has a silver plating layer (12) on its upper and lower outer surfaces.

4. The vacuum circuit breaker for outdoor high salt spray environments according to claim 1, characterized in that: The control box (4) is equipped with a secondary wiring terminal (13).

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