As a professional manufacturer with 37 years of profound experience in the power equipment field, Richge Technology (Ningbo Richge Technology Co., Ltd., brand English logo "Richge") relies on mature technical accumulation and strict quality control. Its high-voltage insulator products cover the entire medium and high voltage levels, widely serving power systems, industrial power distribution and other scenarios. The product system is built around three core advantages: "reliable insulation performance, strong environmental adaptability, and outstanding customization capabilities". The following is a detailed introduction from five aspects: product positioning, core product categories, technical characteristics, application scenarios and quality assurance.
Richge Technology's high-voltage insulators focus on the core insulation needs of power transmission and distribution equipment, and focus on "full-scenario adaptation of medium and high voltage". The voltage levels cover the three mainstream medium and high voltage ranges of 12kV, 24kV and 35kV (adapting to common medium-voltage systems in domestic power grids). At the same time, it has the ability to customize insulation solutions for higher voltage levels for special needs. Positioned as "key supporting components for high-voltage equipment", the products are mainly supplied to complete machine manufacturers such as high-voltage switchgear, substation equipment, and grounding switches, as well as power engineering and industrial project customers. They are core components to ensure "insulation safety and stable operation" of high-voltage systems.
According to public product information, Richge Technology's high-voltage insulators can be divided into three core series. Each category is targeted to adapt to different high-voltage scenarios in terms of structural design, material selection and performance indicators:
• Core Products: JYZ series insulators (models include JYZ 1-12Q, JYZ 2-12Q, JYZ 3-12Q), insulation supports in switchgear, contact insulation covers
• Material Characteristics: Adopting epoxy resin or cross-linked polyethylene (XLPE) as the base material, it has excellent dielectric loss performance (dielectric loss factor tanδ ≤ 0.003@20℃), breakdown resistance (≥20kV/mm), and is UV-resistant and aging-resistant, adapting to long-term outdoor or closed cabinet environments.
• Key Functions: Mainly used in 12kV switchgear and ring network cabinets to realize electrical isolation and mechanical support of high-voltage contacts and busbars, prevent leakage or creepage, and withstand transient electrical stress generated by switch operations in the cabinet.
• Specification Features: Compact structure, adapting to mainstream 12kV switchgear (such as KYN28, XGN series). Some models have positioning groove design for quick installation and precise positioning.
• Core Products: GIS insulators (spacer insulators/barrier insulators), cable bushings, insulation partitions
• Technical Highlights:
• Core Products: Solid-sealed pole insulators for vacuum circuit breakers, insulation supports for high-voltage grounding switches, insulation bushings for transformer outgoing lines
• Core Advantages:
Richge Technology's high-voltage insulators integrate a number of targeted technologies in materials, processes and structural design to meet the strict requirements of high-voltage scenarios:
• Base Material Selection: Epoxy resin, cross-linked polyethylene, and silicone rubber are the core base materials. Among them, epoxy resin adopts "low molecular weight bisphenol A type" with high purity, low impurities, and stable dielectric constant (εr=3.8~4.2@50Hz); silicone rubber selects "HTV high-temperature vulcanization type" with excellent hydrophobic performance (water contact angle ≥105°) and strong hydrophobic migration, which can quickly restore insulation performance after surface contamination.
• Auxiliary Material Upgrade: Nano-sized Al₂O₃ filler is added to improve the thermal conductivity of the material (thermal conductivity increased by 20%), avoiding insulation aging caused by local overheating during high-voltage operation; some products add flame retardants (complying with UL94 V-0 level) to prevent combustion risks caused by short-circuit arcs.
• Key Processes: Core products adopt three processes: "APG automatic pressure gel", "vacuum casting", and "integrated molding" to replace traditional manual casting and reduce human error:
• APG process: By precisely controlling temperature (120℃~140℃) and pressure (5~8MPa), ensure the internal compactness of insulators and avoid bubbles and cracks;
• Vacuum casting: Casting materials in a -0.095MPa vacuum environment to eliminate internal gaps and improve breakdown resistance;
• Quality Control: Each batch of products must undergo "vacuum degree detection", "dielectric loss test", and "power frequency withstand voltage test" (1min withstand voltage value ≥3U₀), and the unqualified rate is controlled within 0.1%.
• Electric Field Optimization: Insulators, bushings and other products adopt "streamlined umbrella skirt" and "built-in shielding electrode" design to avoid electric field concentration at corners and reduce the risk of partial discharge;
• Installation Adaptation: Insulators are reserved with standardized installation holes and positioning grooves, and the compatibility with high-voltage switchgear (such as MNS, KYN series) and grounding switches is over 95%, reducing on-site modification work;
• Environmental Adaptation: Outdoor insulators adopt "large umbrella skirt + deep rib groove" structure to increase creepage distance (35kV products have creepage distance ≥400mm). At the same time, the umbrella skirt inclination angle is designed to 15°, which is convenient for rainwater冲刷 and prevents contamination accumulation.
With the characteristics of "multi-voltage level and strong environmental adaptation", Richge Technology's high-voltage insulators are widely used in core high-voltage equipment in power systems and industrial fields:
• Substation Equipment: As insulation support and isolation components for "circuit breakers, disconnectors, transformers" in 35kV and below substations, such as solid-sealed pole insulators for circuit breakers and bus insulation partitions in 35kV substations, ensuring no leakage or breakdown of equipment under high voltage.
• High-Voltage Switchgear: Adapting to 12kV~35kV indoor/outdoor high-voltage switchgear (such as ring network cabinets, GIS cabinets), providing insulation solutions such as contact insulation, cabinet separation, and cable引出, such as spacer insulators for 12kV ring network cabinets and barrier insulators for 24kV GIS cabinets.
• Industrial High-Voltage Systems: Serving high-voltage power distribution systems in large industrial enterprises such as iron and steel, chemical industry, and metallurgy, such as outgoing insulation bushings for 35kV industrial transformers and insulation supports for high-voltage motors, which can withstand dust and corrosive gases in industrial environments and ensure continuous production.
• New Energy Supporting: Adapting to 35kV power distribution equipment in photovoltaic and wind power booster stations, such as insulation supports for grounding switches in wind power booster stations (low temperature resistant to -40℃) and high-voltage insulation partitions for photovoltaic inverters, meeting the "high reliability and long life" requirements in new energy scenarios.
Richge Technology ensures the reliability of high-voltage insulators through "full-process quality control + industry standard certification":
• Certification Compliance: Products comply with international standards IEC 61462 (composite insulators), IEC 62271-303 (insulation requirements for high-voltage switchgear) and national standards GB/T 16927.1 (high-voltage test technology), GB 1094.3 (insulation requirements for power transformers). Some products have passed CE and UL certifications and can be exported to overseas markets.
• Testing Equipment: Equipped with industry-leading testing equipment, including "partial discharge tester" (detection accuracy ≤1pC), "power frequency withstand voltage test bench" (maximum output voltage 200kV), "high and low temperature damp heat test chamber" (simulating -40℃~+85℃, 95%RH environment). Each product must pass three core tests: "power frequency withstand voltage", "partial discharge" and "mechanical strength" before leaving the factory.
• Customer Feedback: The products are supplied to domestic high-voltage equipment manufacturers and power research institutions, and have been recognized by users for "stable insulation performance and low failure rate (≤0.5%/year)". Especially in 35kV substations and industrial high-voltage systems, the service life can reach more than 15 years.
Richge Technology's high-voltage insulators have core competitiveness of "12kV~35kV full voltage coverage, high insulation performance, and strong environmental adaptation". Through optimized material selection, automated processes, and optimized structural design, they have become reliable supporting components for medium and high-voltage power distribution systems. Its products not only meet the needs of conventional high-voltage scenarios, but also can provide customized solutions for special environments such as high altitude, coastal areas, and industrial pollution. They are adapted to high-voltage equipment in multiple fields such as power, industry, and new energy, and are a preferred product with both "professionalism and practicality" in the medium and high-voltage insulation field.
