Inner Tapered Insulation Sleeves (Inner Tapered Sockets)
产品概述
Inner Tapered Insulation Sleeves (Inner Tapered Sockets) 环氧树脂浇注绝缘件是专为 10kV/24kV 中压配电系统设计的。它们具有内锥形接口结构，用作电缆附件和配电设备（环网柜等）之间的绝缘连接基座。 switchgear，箱式变压器），提供导电连接、绝缘隔离和机械支撑功能。它们是实现可分离电缆附件安全可靠连接的核心部件，广泛用作室内外配电设备的电缆进出线接口。
产品特点
电气和绝缘性能
Manufactured by integral casting with high-performance epoxy resin, the product is seamless and void-free with excellent insulation properties. It withstands the rated voltage and short-duration overvoltages of 10kV/24kV systems with sufficient insulation margin; partial discharge ≤10pC (at 1.5U₀).
Built-in electric field optimization structure and stress control layer uniformly distribute the electric field and effectively suppress partial discharge, eliminating the risk of electrical erosion and breakdown during long-term operation, with stable and reliable insulation performance.
Built-in copper/aluminum conductive inserts provide excellent conductivity with low contact resistance, capable of carrying the rated current of the corresponding current rating. Heat generation during long-term operation is minimal, with strong anti-corrosion and anti-oxidation performance.
The insulation surface is treated with a special process to achieve high surface resistivity and strong hydrophobicity, effectively preventing surface flashover caused by condensation and contamination, and improving insulation reliability in harsh environments.
结构与安全特性
Standardized inner tapered interface design strictly complies with GB/T 12706 and IEC 60840 standards, allowing universal interchangeability with inner tapered cable accessories of the same specification (elbow connectors, surge arresters, insulating caps) with strong compatibility.
Integrated structural design: the rear end features a flange mounting base for direct attachment to the distribution equipment enclosure, while the front end provides an inner tapered interface for insulation isolation and conductive connection between the equipment and cable accessories. Installation is convenient with no additional adapter components required.
Anti-misinsertion and anti-misconnection design: interface dimensions are uniquely matched, allowing connection only with cable accessories of the corresponding specification, eliminating mixed use of accessories of different ratings. Built-in positioning and locking structure prevents loosening and disengagement after installation.
Fully insulated structure with high outer insulation strength eliminates the risk of electric shock during operation, ensuring the safety of operation and maintenance personnel.
环境和耐候性性能
Excellent weather resistance suitable for a wide temperature range of -40°C to +90°C; epoxy resin performance does not degrade at high or low temperatures with no risk of cracking or embrittlement, adaptable to outdoor and indoor applications.
Moisture-proof, waterproof, pollution-resistant, and salt spray-resistant with IP67 protection rating, capable of long-term stable operation in humid, dusty, salt spray, and other harsh environments, immune to rainwater and condensation ingress.
Anti-aging, UV-resistant, and ozone-resistant with a service life exceeding 30 years. Maintenance-free operation reduces long-term operational and maintenance costs.
机械和兼容性特性
高机械强度，抗冲击和振动，能够承受运输、安装和运行过程中的机械应力而不发生变形或损坏；抗震等级为8级。
Flange mounting structure design compatible with standard mounting hole patterns of mainstream distribution equipment, allowing convenient installation without special tools.
Available in multiple specifications including 1#, 2#, and 3#, adaptable to distribution equipment and cable accessories of different voltage and current ratings with strong universality.
技术参数
| 参数类别 | 参数 | 规格 |
| 额定电气参数 | 系统电压 (Un) | 10kV/20kV |
| 额定电压 (Ue) | 12kV/24kV | |
| 最大工作电压 (Um) | 17.5kV/25.2kV | |
| 额定频率 (fn) | 50赫兹/60赫兹 | |
| 工频耐压 | 42kV/5min (12kV dry test), 65kV/5min (24kV dry test), no breakdown, no flashover | |
| 雷电冲击耐受电压 | 95kV (12kV peak), 125kV (24kV peak), no breakdown, no flashover | |
| 局部放电 | ≤10pC (在1.5U₀时) | |
| 额定电流额定值 | 630A/1250A (multiple specifications available) | |
| 额定短路耐受电流 | 20kA/2s, 25kA/2s, 31.5kA/2s (optional) | |
| 接触电阻 | ≤50μΩ | |
| 结构和材料参数 | 主体材料 | Epoxy resin (insulation layer), copper/aluminum tin-plated (conductive inserts) |
| 防护等级 | IP67 | |
| 接口标准 | Inner tapered interface complying with GB/T 12706 and IEC 60840 standards | |
| | Specification Series | 1#, 2#, 3# (adaptable to different voltage/current ratings) | |
| 环境参数 | 适用高度 | ≤2000米（可高海拔定制） |
| 环境温度 | -40°C 至 +90°C（工作温度），-40°C 至 +70°C（储存温度） | |
| 相对湿度 | ≤100%（无冷凝） | |
| 抗震等级 | 八年级 | |
| 适用标准 | GB/T 12706, IEC 60840, GB/T 11022, DL/T 404 |
应用
Applicable Voltage Ratings: 10kV/20kV AC medium-voltage power distribution systems, compatible with distribution equipment having maximum operating voltages of 17.5kV/25.2kV.
适用设备和场景：
Cable inlet/outlet interfaces for 10kV/24kV ring main units, switchgear, pad-mounted transformers, American-style transformers, and other distribution equipment, serving as connection bases for inner tapered cable accessories;
Used in conjunction with inner tapered elbow cable connectors, surge arresters, and insulating caps to form complete separable cable terminals and surge arrester interfaces;
Urban distribution network cable circuits, industrial and mining enterprise power distribution systems, new energy (photovoltaic/wind power) step-up substation distribution equipment interfaces;
Interface installation for indoor/outdoor distribution rooms, underground utility tunnels, cable tunnels, and other multi-scenario distribution equipment.
Functional Purpose: Serves as an integrated insulated connection base between distribution equipment and inner tapered cable accessories, providing insulation, sealing, conduction, and mechanical support connections, delivering safe and reliable cable interface solutions for medium-voltage power distribution systems.
操作条件
正常运行条件
海拔：≤2000米；
环境温度：-40°C 至 +90°C，设备运行温度符合相关标准；
相对湿度：≤100%（无冷凝）；
Environmental conditions: no corrosive gases, no flammable or explosive media, no severe vibration or shock;
Installation method: flange-fixed mounting to equipment enclosure; horizontal or vertical installation acceptable; installation space must meet accessory mating operation requirements.
特殊操作条件（需要定制）
海拔超过2000米；
环境温度超出-40°C至+90°C的范围；
严重污染、盐雾或化学腐蚀环境；
高振动或高冲击条件；
Non-standard flange mounting hole patterns or special interface specifications;
Special grounding requirements or high pollution level applications.
安装与维护
安装要求
Prior to installation, inspect the product appearance for cracks, damage, and voids; verify that the insulation surface is undamaged and the conductive inserts are intact, free of corrosion and deformation.
Clean the equipment enclosure mounting surface by removing oil, dust, and foreign matter; ensure the mounting surface is flat and clean; install the sealing gasket to ensure reliable flange face sealing.
Align the sleeve flange with the equipment enclosure mounting holes and tighten with the supplied bolts to the specified torque to prevent loosening that could cause seal failure or poor contact.
Apply a uniform coat of dedicated silicone grease lubricant to the inner wall of the sleeve’s inner tapered interface before installing the matching inner tapered cable accessories; ensure accessories are fully seated and engage the anti-withdrawal locking device.
After installation, perform insulation resistance testing and power frequency withstand voltage testing; the unit may be energized only after passing these tests.
维护要求
Periodically inspect the sleeve appearance for cracks, discharge marks, and contamination accumulation; verify flange connection bolts are not loose and seals are free of aging or damage.
定期测试绝缘电阻，以验证性能合规性并及时发现潜在故障。
Clean the sleeve surface by removing dust and contamination; maintain the insulation surface dry and clean; prevent contamination by oil or chemical substances.
If cracks, damage, discharge, overheating, or other abnormalities occur on the sleeve or associated accessories, immediately de-energize and replace; continued operation in a degraded condition is strictly prohibited.
Insertion and withdrawal of associated accessories must be performed using dedicated insulated operating tools; bare-hand operation of energized connectors is strictly prohibited; all operations must strictly comply with power distribution safety regulations.
注意事项
The product must be installed, commissioned, and maintained by qualified electrical personnel holding medium-voltage distribution construction credentials; operation by unqualified personnel is strictly prohibited.
The product must be used with inner tapered cable accessories of the corresponding specification; pairing with accessories of different voltage or current ratings is strictly prohibited, as this will cause insulation failure and safety incidents.
The sleeve must not be disassembled or modified without authorization, as doing so will void the warranty and safety assurance; use of non-dedicated tools to forcibly install or remove accessories is strictly prohibited.
Flange mounting bolts must be tightened to the specified torque to prevent loosening that could cause seal failure or poor contact and affect safe equipment operation.
Store in a dry, ventilated, cool environment away from direct sunlight, high temperatures, humidity, and compression; contact with sharp objects that could damage the insulation layer is strictly prohibited.
When performing live-line operations on associated accessories, strictly comply with power distribution safety regulations, implement proper safety protective measures, and avoid any unauthorized operations.
型号 designation
| 型号 designation | 描述 |
|---|---|
| 1#/2#/3# | Specification series codes, adaptable to distribution equipment and cable accessories of different voltage and current ratings respectively |
| Inner Tapered Insulation Sleeves | Inner tapered insulation sleeves cast from epoxy resin, serving as connection bases for inner tapered cable accessories |
适用的标准和认证
International Standard: IEC 60840 “Power cables with extruded insulation and their accessories for rated voltages above 30kV (Um=36kV) up to 150kV (Um=170kV) — Test methods and requirements”;
National Standards: GB/T 12706 “Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV)”, GB/T 11022 “Common specifications for high-voltage switchgear and controlgear standards”, DL/T 404 “3.6kV~40.5kV AC metal-enclosed switchgear and controlgear”;
该产品已通过国家高压电器质量监督检验中心型式试验，符合国家电气安全标准。
售后服务
Product warranty period: 18 months from the date of delivery from the factory, or 12 months from the date of commissioning, whichever comes first;
Free repair or replacement for quality-related issues within the warranty period;
提供技术支持、安装指导及定制化服务（特殊规格、特殊工况适应）。
文档通知
The technical parameters in this manual are based on standard operating conditions. Special operating conditions require customization based on actual requirements; the product technical agreement and type test report shall prevail as the final reference.
附录：产品概述图
