Muhimmanci Da Turanci Ingantaccen Vacuum Interrupter A Cikin Ring Main Units Kuma Tashar Addinin Kwallon Tsakiya

Hukumar da Yadda Ake Tattara Maimaitoci na Vacuum Interrupter a Cikin Kirkiro na Solid Insulation

Muhimmanci a cikin hakar kirkiro na solid insulation component shine ya kamata a zama wanda za ku amfani da direct encapsulation ko potting na ranar daban-daban don vacuum interrupter. Idan an yanke direct encapsulation, zai iya kasance damuwar mutane saboda masu APG process ko abubuwan da suka shafi ingantaccen vacuum interrupter. Kuma direct encapsulation yana ba da hankali a kan tattalin jiki na main conductive circuit kuma yana bukatar ilimin material mai kyau, wanda yake tsarki a yi mass production saboda mafi girman mutum suna cece vacuum interrupters daga manyan masu sana'ar da suka samu.

Idan an amfani da subsequent installation and potting, ana iya tabbatar da external insulation, kuma babban cost na vacuum interrupter yana da damuwa, saboda ba a bukata specialized encapsulated pole-type interrupters. A lokacin potting, ba a bukata buffer layer waje na interrupter, surface treatment ne kafin fiye. Wannan aikin yana da matattaka a cikin outdoor vacuum circuit breakers shekaru daban-daban. Kuma idan abincin ya kula, silicon rubber waje na interrupter yana da hankali a kan flexibility, wanda yake ba da stress relief mai kyau.

Hukumar da Glass Transition Temperature a Cikin Kirkiro na Solid Insulation

Akwai, idan glass transition temperature yana da damuwa, material yana da damuwa ta kusa da kusa kuma yana da damuwa ta kusa da kusa ta kusa. Idan an yanke glass transition temperature kawai saboda thermal resistance, akwai kadan-kadanda da ke iya samun glass transition temperature mai damuwa da kuma crack resistance mai kyau. Amma, wasu materials waɗansu suna da damuwa, wanda ke tsarki a yi production costs. Idan price na product gaba yana da damuwa da abubuwan da ke da su, customer acceptance zai ci gaba.

Saboda haka, hukumar da glass transition temperature zai iya duba a matsayin wanda ake amfani a cikin SF₆ gas-insulated switchgear insulation components, misali SF₆ enclosures, inda upper and lower contacts suna fito a resin. Materials da ake amfani suka da glass transition temperature da take rage 100°C, kuma wasu products su suna da damuwa shekaru daban-daban da kuma abubuwan da suka shafi saboda overheating, wanda yake nuna rationality na wannan hukumi. Daga riyar switchgear, control na temperature rise yana da muhimmanci - domin tabbatar da current-carrying capacity na main circuit, control na conductivity na material, plating quality, da assembly precision, kuma kuma control da reduce ambient temperature a cikin structural design. Specifications na material zai iya duba a matsayin comprehensive evaluation, a cikin operational experience daga products masu hawa.

Kirkiro na Outlet Bushings a Cikin Solid Insulation Components

A cikin kirkiro na outlet bushings na solid insulation components, inlet bushings suna da damuwa straight-through type, amma outlet bushings suna da damuwa bent design. Bent bushings suna da damuwa a yi, masu hukumomi sun hada da:

• Alignment bayan conductor da mold, inda deformation zai iya faru a lokacin pre-treatment na conductor;

• Cracking bayan product molding, saboda conductor yana da damuwa a lokacin molding, kuma improper process control zai iya ba da cracks bayan cooling. Kuma a lokacin kirkiro, ya kamata a duba cewa discharge to the installation nut ba zai faru ba a lokacin subsequent installation.

Kirkiro na Conductive Components da Connection na Conductive Circuits a Cikin Solid Insulation

A lokacin kirkiro na main conductive components, ya kamata a yi smooth transitions idan mumkin a cikin wurin ya kamata a kan current capacity requirements - preferably rounded rather than angular. Welding ya kamata a yi connections baki daya saboda bolted joints don minimize corona discharge and prevent cracking. Don movable connections, knife-switch type connection ya kamata, wanda yake ci gaba cost compared to plug-in types, reduces requirements for conductor dimensions and positional accuracy, and allows easier adjustment of loop resistance.

Based on overall loop resistance requirements, it is advisable to specify the loop resistance of conductive parts embedded in resin, particularly for welded conductors, to avoid product scrapping due to excessive resistance caused by poor welding quality. By optimizing conductor shape design, electric field strength to ground (surface grounding layer) can be reduced, adhesion with resin improved, and overall mechanical strength of the insulating component enhanced.

Kirkiro na Surface Grounding Layer a Cikin Solid Insulation Components

Surface grounding layer treatments include externally coating with conductive silicone rubber, applying conductive adhesive (or paint), or metal spraying. Regardless of the method used, the core objective is to control partial discharge. Without effective control, partial discharge can easily lead to breakdown, which is also related to the design of resin layer thickness. Compared to other shielded insulation components, the structure of solid insulation differs significantly—other components typically feature a concentric cylindrical electric field between high-voltage and ground ends, whether the high-voltage end is a shielding mesh or a circular conductor.

In solid insulation, however, the high-voltage section includes both circular and flat surfaces, while the ground end is flat, necessitating careful consideration of how these structural differences affect performance. From a technical standpoint, two key requirements for the grounding layer are continuity and partial discharge level. During transportation, installation, especially on-site work, any impact damage or peeling may cause partial discharge at the grounding layer's edge, posing new challenges for subsequent operation and protection.

From a heat dissipation perspective, metal spraying offers the best performance due to superior thermal conductivity, significantly enhancing stability against various aging factors, particularly thermal cycling. Protection of the grounding layer must be considered during insulation component manufacturing, and product protection during grounding layer processing is also essential.

Assembly Design of Solid Insulation Body and Bushings

Most designs separate the main body from inlet and outlet bushings, including the connection between fuse insulating tubes and bushings, which are in hard contact during installation. Dimensional control is important, but process control during assembly is equally critical. If contact gaps exist, or if dust or moisture (from environmental condensation) is introduced during assembly, flashover discharge to the mounting nut may occur. Additionally, ring main units have compact structures, so layout must consider ease of installation for inlet/outlet insulation and cables, especially cable terminations, which already demand high installation quality. Inconvenient installation may easily lead to quality issues and cause insulation breakdown.

Conclusion

Solid-insulated ring main units have significant market potential. Research on their core component—the solid insulation element—holds broad prospects. As solid insulation design continues to improve, the technology for solid-insulated ring main units will achieve further advancement.