24kV Integrated Insulator
製品概要
24kV一体型碍子 24kVの中電圧用に特別に設計された、コア絶縁部品です。 switchgear および関連する電力機器。一体成形プロセスで製造され、電気絶縁、機械的サポート、および絶縁/保護機能を兼ね備えています。屋内用中電圧配電システムで広く使用されており、電力機器の安全で安定した運用を保証する重要な絶縁部品として機能します。
製品の特徴
優れた電気的性能
Rated insulation voltage is matched to 24kV medium-voltage systems with high dielectric strength, capable of withstanding the system rated voltage, lightning impulse overvoltage, and switching overvoltage, effectively preventing surface flashover, breakdown, and other insulation failures.
Manufactured from high-quality epoxy resin (or epoxy glass fiber reinforced plastic), the material exhibits low dielectric loss and high insulation resistance, with no insulation aging or performance degradation during long-term operation, meeting the requirements of GB/T 1408.1 and other national standards.
The shed profile design optimizes electric field distribution, increases creepage distance, and effectively suppresses the risk of insulation failure in contaminated or humid environments.
Reliable Mechanical Performance
The monolithic integrated structure design provides high mechanical strength and excellent impact resistance, capable of withstanding the mechanical and installation stresses imposed by busbars and contacts, with no risk of cracking or deformation.
Excellent vibration and seismic resistance ensures the mechanical stability required for long-term operation of power equipment and accommodates the complex installation conditions within switchgear enclosures.
Brass inserts are embedded at the top with high-precision threading, providing a secure connection capable of sustaining long-term busbar clamping forces without loosening or pullout.
優れた環境適応性
The material offers weathering resistance and corrosion resistance, capable of withstanding indoor temperature and humidity variations and mildly contaminated environments without cracking, chalking, or aging.
Excellent flame retardancy compliant with UL94 V-0 flame retardant standard — the material does not ignite or sustain combustion when exposed to an open flame, enhancing fire safety of the equipment.
Moisture resistance, mold resistance, and salt spray resistance meet applicable standards, making the product suitable for indoor power distribution environments across different regions.
Structural and Process Advantages
The integrated monolithic design reduces assembly steps, improves installation efficiency, and eliminates the sealing and insulation risks associated with multi-piece structures.
Vacuum epoxy casting process ensures the product is free of voids and defects, with uniform and consistent internal insulation performance and high quality stability.
The open-bottom structure accommodates the installation requirements of switchgear busbar compartments and contact boxes, offering strong compatibility with enclosures and busbars for easy installation.
コア技術パラメータ
Note: The above parameters are for standard model specifications. Custom parameters (e.g., higher withstand current, special creepage distance, etc.) are available upon customer request.
アプリケーションスコープ
適用シナリオ
24kV indoor metal-clad withdrawable switchgear (KYN28A-24 and similar models)
24kV indoor fixed-mounted switchgear and ring main units
Busbar support and contact insulation isolation for 24kV medium-voltage distribution equipment
Internal insulating components for 24kV compact substations and switching stations
Insulation support and isolation for other 24kV medium-voltage power equipment
Applicable Systems
Three-phase AC 50Hz, 24kV medium-voltage power distribution systems
Systems with unearthed neutral, arc suppression coil (Petersen coil) earthed neutral, or resistance-earthed neutral
Power equipment in indoor power distribution environments
動作条件
通常運転条件
Altitude: ≤1000m (high-altitude customization available; insulation parameters corrected per GB/T 11022)
Ambient temperature: -5°C ~ +40°C (daily average temperature ≤35°C)
Relative humidity: daily average relative humidity ≤95%, monthly average relative humidity ≤90%, no condensation
Environmental conditions: indoor installation, no severe contamination, no corrosive gases, no flammable or explosive media, no intense vibration or shock
Mounting orientation: vertical installation, tilt angle ≤5°
特別運用条件（カスタマイズ要）
高地環境（標高1000m超）：絶縁パラメータは標高に合わせて補正する必要があり、沿面距離と絶縁耐力が増加します。
High/low temperature environments (outside the -5°C ~ +40°C range): custom materials for high/low temperature resistance
Heavily contaminated environments: increased creepage distance with anti-pollution shed profile design
Special vibration/shock environments: enhanced mechanical strength design
設置および保守要件
インストール要件
Inspect the product appearance before installation: no cracks, no voids, no damage, no loose inserts
Install strictly according to the switchgear assembly drawings to ensure vertical mounting with a tilt angle not exceeding 5°
When connecting busbars, tighten insert bolts to the specified torque to avoid cracking the insulator due to excessive force
Avoid striking or knocking the insulator during installation to prevent insulation damage
Clean surface dust and foreign matter after installation to ensure the insulating surface is clean
保守要件
Regular inspection: check the insulator surface for contamination, cracks, and discharge marks, and check inserts for looseness
Cleaning and maintenance: wipe the surface with a dry cloth; the use of corrosive cleaning agents is strictly prohibited
Insulation testing: conduct periodic insulation resistance and withstand voltage tests to verify that insulation performance meets requirements
Replacement criteria: if cracks, puncture, or severe contamination that cannot be cleaned is found, replace the product immediately
適用規格
GB/T 1408.1 — Methods of Test for Electric Strength of Insulating Materials — Part 1: Tests at Power Frequencies
GB/T 11022 — Common Specifications for High-Voltage Switchgear and Controlgear Standards
GB/T 4109 — Insulating Bushings for Alternating Voltages above 1000V
IEC 60660 — Insulators for High-Voltage Switchgear and Controlgear
JB/T 10685 — Insulating Parts for High-Voltage AC Switchgear
注意事項
This product is intended exclusively for indoor 24kV medium-voltage systems; operation beyond rated voltage or specified conditions is strictly prohibited
Installation and maintenance must be performed by qualified electrical personnel in strict compliance with electrical safety regulations
During transport and storage, avoid impact, moisture, and exposure to high temperatures; the storage environment must be dry and well-ventilated
If the product shows visible damage or fails to meet insulation performance requirements, it must not be put into service
For customized products, the bilateral technical agreement shall prevail; parameters in this manual are for reference for standard models only
文書注記
This manual is the standard product technical manual for the 24kV integrated insulator. Parameters and content may be adjusted according to the customer’s specific model and customization requirements. All technical specifications are subject to the product factory inspection report.
付録：製品概要図
| パラメータカテゴリ | 技術仕様 | 備考 |
|---|---|---|
| 定格電圧 | 24kV | Matched to 24kV medium-voltage distribution systems |
| 定格周波数 | 50ヘルツ | Compliant with domestic power frequency standard |
| 定格雷撃インパルス耐電圧 | 125kV（ピーク） | Phase-to-earth / phase-to-phase |
| Rated Power Frequency Withstand Voltage | 42kV (1 min) | Phase-to-earth / phase-to-phase |
| 沿面距離 | ≥450mm | Meets pollution severity class II and above |
| 絶縁抵抗 | ≥1×10¹²Ω | Under normal conditions |
| 誘電正接（tan δ） | ≤0.005 | At power frequency |
| Rated Short-Time Withstand Current | 25kA/4s (customizable) | Matched to switchgear short-circuit current requirements |
| Rated Peak Withstand Current | 63kA (customizable) | | |
| Flame Retardancy Class | UL94 V-0 | | |
| 動作温度範囲 | -40℃～+85℃ | Indoor environment |
| 相対湿度 | ≤95% (25℃にて) | No condensation |
| 素材 | Epoxy Resin (EP) / Epoxy Glass Fiber Reinforced Plastic | Customizable |
| Insert Material | Brass (tin-plated or silver-plated optional) | | |
| 保護等級 | IP20 | Suitable for indoor switchgear |
