24kV Polymer Insulator With Clevis Tongue
Products Description
Clevis & Tongue (Fork-shaped / Tongue-shaped hardware)
Clevis (Fork-shaped / U-shaped) = Female head; Tongue (Tongue-shaped / Single ear) = Male head. These two are paired to form Clevis-Tongue connection, which is one of the most common end hardware types for composite insulators (the other mainstream type is Ball-Socket ball socket).
1. Shape and Structure
Clevis (Fork-shaped / Female head): U-shaped opening, double holes, used to encase Tongue and fix it with a pin; also called "Y-clevis" or "fork end".
Tongue (Tongue Shape / Male End): Single ear, single hole, inserted into the Clevis opening, locked with a pin and an opening pin; also called "single eye" or "male end".
Pairing effect:
II. Materials and Specifications (Power Standards)
Material: 45# forged steel (Forged Steel), cast steel is prohibited; hot-dip galvanized , zinc layer ≥ 86μm, corrosion protection for 30 years +.
Mechanical Load (SML): 70/100/120/160/210kN (commonly 70/120kN).
Compatible Voltage: 10kV – 500kV composite suspension / tension insulators.
Standards: IEC 61109, ANSI C29.12, GB/T 19443.
III. Installation and Usage
Connection Method:
Clevis (female head) is installed on the upper end of the insulator (to connect to the tower);
Tongue (male head) is installed on the lower end of the insulator (to connect to the conductor / hardware string);
After connection, a pin and an opening pin (Cotter Pin) are inserted to prevent loosening.
Core advantages (compared to Ball-Socket):
Quick disassembly and assembly: No special tools required, can be plugged and unplugged by hand;
Flexible angle: Can swing ±90°, suitable for line bends / wind deviations;
Low cost: Simple structure, price is 20% - 30% lower than ball socket;
High versatility: Widely used in global distribution / transmission lines (more common in Latin America, North America, Africa).
Typical applications:
Composite suspension insulators (such as FXB-35/70WT);
Distribution line tension strings, straight strings;
Complementary to U-shaped hanging rings, right-angle hanging plates, tension clamps, etc.
Our Products
Clevis Tongue
70kN/120kN/160kN available
Cast Iron Or Cast Steel,Hot Dip Galvanized
Minimum thickness of the galvanization：86μm.
The Drawing
35kV 70kN Composite Insulator
Application
1️⃣ Dead-end Structure
For 35kV lines:
Line start/end point
Substation incoming/outgoing lines
Used to secure the conductor and bear all tension.
2️⃣ Angle Tower/Angle Pole
When the line turns (e.g., 15°, 30°, 60°, etc.):
The conductor experiences lateral tension.
Tension insulators are required to withstand the unbalanced tension.
3️⃣ Long Span
Crossing:
Highways
Rivers
Valleys
Railways
Large spans and high mechanical loads require tension-resistant structures.
4️⃣ Mountainous or Windy Areas
In:
High-altitude areas
Typhoon-prone areas
Ice-covered areas
Tension insulators can withstand higher mechanical loads (70kN/100kN/120kN, etc.).
⚡ Typical Applications in 35kV Systems
35kV Overhead Transmission Lines
35kV Distribution Trunk Lines
Outgoing Lines from Small Substations
Wind/Hydropower Connection Lines
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