The tongue type suspension insulator cap is a metallic component that connects porcelain or toughened glass insulating elements to support overhead conductors in high voltage power transmission systems. It provides mechanical support to withstand high tensile loads, ensures electrical insulation to prevent current leakage, and distributes mechanical stress uniformly across insulator strings.
The cap features a flat, extended plate with a hole for attachment, enabling lightweight construction and easy assembly with various fittings. Material composition typically involves forged steel or ductile iron treated with zinc galvanization for enhanced corrosion resistance. Key specifications include mechanical class ratings of 55 kN, 85 kN, and 105 kN, corresponding to sizes of 50 mm, 80 mm, and 100 mm respectively, with dimensional heights of 92 mm, 128.5 mm, and 106 mm.
The tongue type suspension insulator cap delivers high mechanical strength, resistance to electrical flashover, and impact strength while adhering to industry standards including International Electrotechnical Commission (IEC) 60383 and American National Standards Institute (ANSI) C29.2. It operates across voltages from 10 kV to 500 kV in suspension insulator strings for transmission and distribution lines, substations, and electrified railway systems. Its simple design enables cost-effective production, secure installation, and minimal maintenance, ensuring consistent performance and long-term durability in power networks.
Expert RaxPower Tongue Type Suspension Insulator Cap Wholesaler
RaxPower is a primary domestic professional manufacturer of electric power fitting and cable accessory, specializing in the production of Tongue type suspension insulator caps that deliver reliable insulation for high-voltage power lines, meeting stringent industry standards.
Established in 2003 in Hebei Province, China, we have over 21 years of extensive experience in manufacturing and exporting.
Our facilities span 17,000 square meters of production workshops and 5,000 square meters of warehouses, supported by a team of over 170 skilled staff, including 30 professional technicians and 10 engineers.
This robust infrastructure and technical expertise enable us to produce insulator caps with high tensile strength, durability, and corrosion resistance, utilizing advanced processes like hot-dip galvanizing.
Focusing on continuous innovation, we have successfully developed a wide range of products, ensuring consistent quality and performance.
Our Tongue type suspension insulator caps have been exported to numerous countries, earning a strong reputation for reliability and excellence.
Adhering to our philosophy of “Sincere Service, Faithful Reputation and Top Priority of Customers,” we maintain strict quality controls to meet global demands.
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| Size (mm) | Dimensions / H (mm) | Mechanical Class (kN) | Material | Standards |
|---|---|---|---|---|
| 50 | 92 | 55 | Forged steel or ductile iron, zinc galvanized | IEC 60383, ANSI C29.2 |
| 80 | 128.5 | 85 | Forged steel or ductile iron, zinc galvanized | IEC 60383, ANSI C29.2 |
| 100 | 106 | 105 | Forged steel or ductile iron, zinc galvanized | IEC 60383, ANSI C29.2 |
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Frequently Asked Questions (FAQS)
What is a tongue type suspension insulator cap?
A tongue type suspension insulator cap is a metal component used in high-voltage power transmission systems. It features a flat, extended plate with a hole that connects to the clevis of another fitting or directly to a conductor clamp. These caps are assembled with porcelain or toughened glass insulating elements and are designed for secure, flexible connections in suspension insulator strings.
What are the typical applications for tongue type suspension insulator caps?
These caps are widely used in high-voltage power transmission and distribution lines, commonly in ceramic or glass insulator strings for overhead transmission systems, including straight line supports and dead-end towers.
What materials and surface treatments are used?
Tongue type suspension insulator caps are typically made from ductile cast iron, malleable iron, or forged steel, with hot-dip galvanized coating for corrosion resistance. Our galvanizing meets ISO 1461 standards with mean coating thickness exceeding 85 microns, ensuring high tensile strength, durability, and reliability in various environmental conditions.
What international standards and certifications do these caps meet?
Our caps comply with ANSI C29.2, IEC 60383, and IEC 60120, ensuring rigorous mechanical strength, electrical performance, and safety. We hold ISO and CE certifications and have passed SGS tests. All manufacturing processes adhere to strict quality control with multi-stage inspections, load testing, and gauge tests per IEC 120 standards.
What are the standard sizes and mechanical ratings available?
Standard sizes include 50 mm (H=92 mm, 55 kN), 80 mm (H=128.5 mm, 85 kN), and 100 mm (H=106 mm, 105 kN). Mechanical resistance typically ranges from 40 kN to 80 kN for tongue type designs.
What are the best practices for installation?
The tongue type design features a simple, flat plate with a hole, allowing for quick installation and easy connection to clevis fittings or conductor clamps. Best practices include inspecting components for correct size and integrity, using appropriate tools and torque settings to avoid over-tightening, ensuring clean contact surfaces, and following manufacturer specifications for alignment and compatibility.
How do you maintain consistent quality for OEM clients?
We implement rigorous quality control from raw material selection to final packaging. Our advanced manufacturing includes hot forging and automated production lines with capacity exceeding 3 million pieces annually. This commitment to consistency ensures uniform strength and safeguards your brand reputation with reliable, high-performance components.
How do you handle bulk orders and ensure timely delivery?
Standard models are typically available from stock, while custom or large-scale orders are managed with lead times as short as 15 days. Our streamlined logistics and efficient processes ensure on-time delivery for all orders without compromising quality.
Do you offer competitive wholesale pricing and a broad product range?
Yes, we provide a comprehensive catalog of suspension insulator caps and related hardware, including tongue, clevis, and socket types, tailored for power transmission and railways. Our efficient production and economies of scale enable competitive wholesale pricing with strong profit margins. We support customization and bulk sourcing to meet diverse market demands.
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