Product Overview

The ESP-DC-15M-A572 represents our flagship double-circuit transmission pole solution, fabricated from ASTM A572 Grade 50 high-strength low-alloy steel (345 MPa yield). Engineered for 66kV through 132kV transmission networks, this 15-meter dodecagonal pole features a seismic-resistant design per IEC 60826 and supports dual vertical circuit configurations with independent phase spacing.

Key Features

• ASTM A572 Grade 50 Steel: Premium HSLA steel with 345 MPa minimum yield strength, excellent weldability, and superior toughness at low temperatures (-20°C Charpy V-notch certified)
• Double-Circuit Configuration: Factory-engineered arm layout for two independent 3-phase circuits on a single pole structure, halving ROW requirements
• IEC 60826 Seismic Design: Analyzed using response spectrum method for Zone IV seismic loading (PGA 0.24g), with verified modal frequencies above lock-in thresholds
• Dodecagonal Cross-Section: Near-circular aerodynamic profile reduces wind drag coefficient by 15% compared to octagonal equivalents
• VCI Packaging: Volatile Corrosion Inhibitor wrapping protects machined surfaces during ocean freight and extended site storage

Technical Specifications

Applications

Designed for high-voltage transmission corridors where right-of-way is constrained, urban transmission line upgrades, substation interconnections, and grid reinforcement projects. The double-circuit configuration is particularly cost-effective for parallel feeder routes serving growing load centers.

Engineering Support

Every ESP-DC order includes complimentary foundation design calculations, PLS-POLE structural analysis report, and site-specific wind/seismic loading verification. Our in-house transmission engineering team provides full project lifecycle support from conceptual design through commissioning.