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Help CenterElectric Porcelain Tension Insulator Ceramic for Guy Wire Low Voltage Factory Price
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Product Description
In low-voltage distribution lines, guy insulators are exposed to outdoor environments for a long time and face multiple challenges such as sunlight, rain, temperature changes, and mechanical tension. Traditional inferior insulators are prone to the following core pain points: insulation performance degradation causing electric leakage, insufficient mechanical strength causing guy wire breakage, and poor aging resistance causing short service life. These hidden hazards not only increase operation and maintenance costs, but also directly threaten line safety and personnel safety. As a manufacturer focused on electric porcelain insulators for many years, Hejian Haokang Electric Co., Ltd. deeply understands users' dual demand for reliability and economy. In response to the above pain points, we adopt high-alumina ceramic raw materials and fully automatic dry-process forming technology, combined with high-temperature sintering above 1250℃, to achieve simultaneous breakthroughs in materials and process. The products thus have excellent insulation resistance, mechanical failing load, and weather/aging resistance, fundamentally solving the reliability problems of line guy insulation.
The following is a detailed explanation of the working mechanism, technical features, and specifications of this low-voltage guy insulator.
· Working Mechanism
The guy insulator is connected in series in the pole guy wire. It uses the high insulation resistance of the ceramic body to electrically isolate the two ends of the guy wire, while withstanding static tension and dynamic impact loads generated by the guy wire. Metal caps or bolts are embedded at both ends of the ceramic body and fixed with cement adhesive, forming an integral load-bearing structure. When the line is energized or struck by lightning, the insulator blocks current from conducting along the guy wire, preventing pole energization and ground faults.
· Product Features
- Premium ceramic raw materials: Made with a formula of kaolin, feldspar, quartz, etc., with Al₂O₃ content ≥35%, densely sintered, water absorption
- High mechanical strength: Electrostatic forming and high-temperature sintering ensure a uniform and dense porcelain body, with mechanical failing load ≥20kN (in accordance with GB/T 775.3 standard).
- Excellent electrical performance: Power-frequency puncture voltage ≥40kV, insulation resistance ≥1000MΩ (dry condition), creepage distance ≥100mm, meeting the insulation requirements of low-voltage lines.
- Aging and weather resistance: The glaze layer is dense and glossy, resistant to acid, alkali, and salt spray corrosion, with stable performance within the temperature range of -40℃ to +100℃.
· Technical Specifications
| Item | Parameter | Remarks |
| Model | J-2 / J-4.5 | Classified by mechanical load |
| Rated voltage | 0.38kV / 0.22kV | Suitable for low-voltage lines |
| Mechanical failing load | ≥20kN (J-2) / ≥45kN (J-4.5) | Complies with GB/T 775.3 |
| Creepage distance | ≥110mm (J-2) / ≥140mm (J-4.5) | Anti-pollution flashover design |
| Insulation resistance | ≥1000MΩ (dry) | Measured by 500V megger |
| Power-frequency breakdown voltage | ≥40kV | Dry flashover test |
· Advantages
- Mature craftsmanship: Over 20 years of experience in electrical porcelain production, with kiln temperature control accuracy of ±3°C, ensuring batch consistency.
- Full inspection before shipment: Each insulator undergoes visual inspection, mechanical load sampling inspection, and insulation resistance tests.
- Wide application: Not only used for low-voltage line guy wires, but also suitable for communication pole lines, railway catenary auxiliary guy wires, and other scenarios.
- Packaging and transportation: Foam spacers and corrugated carton packaging are used to effectively reduce transportation damage rates.
Hejian Haokang Electric Co., Ltd. has a complete electrical porcelain production line with an annual capacity of over 5 million insulators. Our products are sold nationwide and indirectly exported to Southeast Asia, Africa, and other regions. We are well aware that every insulator is related to line safety, so we implement full-process quality control from raw material selection to finished products off the line. The company keeps common models in stock to meet urgent procurement needs. If you are looking for a guy insulator supplier that combines reliability, economy, and fast delivery, we suggest you first verify product quality through samples. Our technical team can provide model selection guidance and installation advice to help you avoid losses caused by improper selection.
You are welcome to call or visit us for consultation. We wish to establish a long-term and stable cooperative relationship with you.
Frequently Asked Questions (FAQ)
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Q: How to determine the mechanical load class of a guy insulator?
A: Generally, select based on the maximum tension of the guy wire. For low-voltage distribution line guy wires with a cross-section not exceeding 35mm², J-2 type (20kN) is sufficient; for steel stranded wire or large spans, J-4.5 type (45kN) is recommended to ensure a sufficient safety margin.
A: Ceramic insulators have better aging resistance, are less prone to embrittlement or delamination during long-term outdoor use, and have strong UV resistance. Although fiberglass insulators are lightweight, their weather-resistant lifespan is usually shorter than that of ceramics. In low-voltage guy wire applications, ceramics offer better cost-effectiveness.
A: No. The metal caps at both ends of the strain insulator are sealed and cured with the porcelain body. During installation, simply tighten the guy wire clamping bolts to the specified torque (usually 30–50 N·m) and avoid over-tightening that could crack the porcelain.
A: Hejian Haokang Electric Co., Ltd. strictly follows GB/T 775.1-2019 "Test methods for insulators" for factory inspection, and can also provide commissioned inspection reports from national authoritative institutions (please communicate in advance). We recommend that customers take samples for inspection on the first purchase to verify quality.
A: We use thickened EPE foam to wrap the porcelain body and pack it in high-strength corrugated cartons, with no more than 20 pieces per carton. Through years of logistics testing, the damage rate is controlled within 1%. If damage occurs upon arrival, we will resend replacements free of charge after receiving photos.
A: Yes. The tension of the guy wire at corners is often greater, so it is recommended to refer to the above mechanical load selection. At the same time, ensure the installation angle of the insulator is consistent with the direction of the guy wire to avoid bending moments that could cause porcelain fracture.
A: This product is rated for low voltage (0.38/0.22 kV). Its creepage distance and breakdown voltage only meet low-voltage insulation requirements. For 10 kV lines, suspension or post insulators should be selected. Do not use it beyond its voltage class.
A: We can accept small-batch customization, such as lengthened porcelain parts or changed metal fitting specifications. The minimum order quantity is generally 500 pieces. Specific details can be discussed with our sales engineers.
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