Power Infrastructure
High-Strength Compression Tension Clamp
The ZTT high-strength compression tension clamp is designed for large-section AACSR and ACSR conductors used on UHV and river-crossing spans. Type testing on a 48.9 mm diameter AACSR-900/510 conductor (RTS 1192.19 kN) recorded a tensile failure at 1227.663 kN, equal to 102.98% of the conductor's rated tensile strength — the tension clamp is stronger than the conductor it terminates.
Features & Characteristics
- ▪Compression joint engineered for large-section AACSR / ACSR conductors.
- ▪Verified stronger than the conductor RTS in ZTT type testing (102.98% RTS on AACSR-900/510).
- ▪Manufactured to BS / EN / IEC 61284 with hot-dip galvanised steel bodies where applicable.
- ▪Suitable for UHV projects and long-span river crossings.
Applications
- ▪Dead-end and tension joints on UHV AC / DC transmission lines.
- ▪Long-span river-crossing lines using high-RTS AACSR / ACSR conductors.
- ▪Repair and mid-span tension joints on heavy-duty overhead lines.
Technical specifications
- Type
- Compression tension clamp (dead-end)
- Test conductor
- AACSR-900/510, OD 48.9 mm, RTS 1192.19 kN
- Tensile test result
- 1227.663 kN — 102.98% RTS of conductor
- Applicable standards
- BS / EN / IEC 61284, BS 3288, IS 2486
- Corrosion protection
- Hot-dip galvanised (ISO 1461, ASTM A153); optional thermal-diffusion GREENKOTE
Type-test conductor (AACSR-900/510) technical structure
| Parameter | Unit | Value |
|---|---|---|
| Conductor diameter | mm | 48.9 |
| Cross section | mm² | 1410.63 |
| Conductor weight | kg/km | 6516.68 |
| Rated tensile strength (RTS) | kN | 1192.19 |
| Modulus of elasticity | GPa | 103.73 |
| Coefficient of linear expansion | 10⁻⁶ /°C | 15.40 |
| Max. DC resistance at 20 °C | Ω/km | 0.03732 |
| Tension clamp tensile test | kN | 1227.663 (102.98% RTS) |
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