33kV Pin Type Composite Insulator for High Voltage Overhead Lines

Main Applications

The 33kV pin type composite insulator is mainly used in medium and high-voltage overhead power distribution networks.

Typical applications include:

• 33kV overhead power lines

• Urban distribution network upgrades

• Rural electrification projects

• Industrial power supply lines

• Utility distribution projects

• Substation incoming and outgoing line support

• Coastal and salt-fog areas

• Heavy pollution industrial zones

• High humidity and high UV environments

• Overseas EPC power projects

Suitable industries include:

1. Power transmission and distribution

2. Electrical grid construction

3. Renewable energy grid connection

4. Industrial and mining power systems

5. Railway and infrastructure power supply

6. International power engineering projects

Product Structure

Wishpower 33kV pin type composite insulators usually consist of the following parts:

1. Epoxy Fiberglass Core Rod
   The core rod works as the main load-bearing component and provides high mechanical strength and bending resistance.

2. HTV Silicone Rubber Sheds
   The silicone rubber housing provides external insulation and improves pollution resistance, tracking resistance, and weather resistance.

3. Hot-Dip Galvanized Metal Fittings
   The fittings are used for connection with crossarms, brackets, or conductor clamps and provide strong corrosion resistance.

4. End Sealing System
   The sealing structure prevents moisture, dust, and contaminants from entering the interface between the core rod and metal fittings.

5. Integrated Molded Housing
   The molded housing improves material bonding and reduces the risk of aging, cracking, and partial discharge.

Technical Principle

How the Composite Pin Insulator Works

The main function of a 33kV pin type composite insulator is to support the conductor and provide electrical insulation. Its working principle includes the following aspects:

1. Electrical Insulation
   The silicone rubber housing and fiberglass core form a high-insulation structure that prevents leakage current from flowing to the pole or ground.

2. Creepage Distance Protection
   The shed design increases the surface leakage path, improving flashover resistance under wet and polluted conditions.

3. Hydrophobic Anti-Pollution Performance
   Silicone rubber helps form separate water droplets instead of a continuous water film, reducing the risk of pollution flashover.

4. Mechanical Load Bearing
   The fiberglass core rod withstands conductor weight, wind load, vibration, and installation stress.

5. Sealing and Aging Protection
   The sealed end structure helps prevent moisture ingress, core corrosion, interface breakdown, and mechanical performance degradation.

测试能力

电气试验

• 工频干/湿耐受电压试验（最高800kV）
• 雷电冲击耐受电压试验（最高1600kV）
• 操作冲击耐受电压试验
• 无线电干扰电压（RIV）试验
• 陡波前冲击电压试验
• 击穿耐受试验

机械试验

• 额定机械负荷试验（拉伸、弯曲、扭转）
• 机械负荷-时间试验
• 锌层附着性试验
• 密封性能试验
• 热机性能试验（温度循环+机械负荷）

环境与老化试验

• 盐雾老化试验（1000小时）
• 1000小时紫外老化试验
• 漏电起痕和电蚀损试验
• 憎水性测试及迁移特性测试
• 温度循环试验（-40℃ ~ +60℃）
• 耐酸/碱/盐腐蚀试验

包装与运输

为确保产品在运输和储存过程中的安全，我们采用以下包装方式：

• 单支包装：每支绝缘子用防静电薄膜包裹，装入高强度纸箱，内部填充缓冲材料。
• 托盘包装：多支绝缘子用木托盘固定，外层缠绕拉伸膜，适合集装箱运输。
• 出口包装：根据海运要求，采用熏蒸木箱、防潮处理，并提供详细装箱单。

定制服务

WishPower可根据客户需求提供以下定制选项：

• 结构尺寸：调整结构高度、爬电距离、伞裙数量/直径
• 端部金具：根据连接金具定制球窝、环槽等接口形式
• 颜色：标准灰色，可定制红、黄、蓝等颜色（需最低订货量）
• 特殊环境：极寒地区（-60℃）、强紫外线、重污秽等特殊配方
• 电压等级：从10kV到1000kV全系列可定制
• 标识印刷：可在伞裙上模压客户标识或型号

具体定制需求请咨询销售工程师，我们将在24小时内为您提供技术方案。