500kV Double-Circuit Compact Transmission Tower

Engineered for High-Density Corridors • Tropical Climate Optimized • IEC/ASCE Compliant

23 YearsExperience 1000 EngineersWorkforce China Southern Power GridCertified Supplier

500kV Double-Circuit Tower structural view in fabrication yard

Height Range 45-120 meters

Voltage Class 500kV AC / ±800kV DC

Design Standard IEC 60652, ASCE 48-11

Wind Load 45m/s (customizable to 50m/s)

Material Q420B High-Tensile Steel

Terrain Category C Optimized

The 500kV Double-Circuit Compact Transmission Tower represents Xytower's engineering excellence in high-voltage infrastructure. Designed specifically for high-density transmission corridors, this tower configuration delivers 30% less right-of-way requirement compared to traditional lattice designs, making it ideal for urban peripheries and environmentally constrained routes.

The double-circuit configuration maximizes transmission efficiency per tower, supporting up to 6 conductors (3 per circuit) with optimized phase spacing for minimal corona loss. Engineered for tropical climates, our proprietary anti-corrosion system ensures 40+ year service life in Southeast Asian monsoon conditions. With 23 years of manufacturing excellence and proven performance on China Southern Power Grid projects, Xytower delivers ISO-certified quality backed by comprehensive engineering support.

Hot-Dip Galvanized ≥86μm Seismic Zone 8 Rated Bolted Connections (No Field Welding)

Technical Specifications

Component	Specification	Material Grade	Standard
Main Leg	L200×200×20mm	Q420B (Yield ≥420MPa)	GB/T 1591-2018
Diagonal Bracing	L90×90×8mm	Q355B (Yield ≥355MPa)	GB/T 1591-2018
Cross-Arm Members	L100×100×10mm	Q420B (Yield ≥420MPa)	GB/T 1591-2018
Main Bolts	M24×80mm Hex Head	Grade 8.8, Zinc-Coated	GB/T 5782, ISO 898-1
Secondary Bolts	M16×50mm Hex Head	Grade 6.8, Zinc-Coated	GB/T 5782, ISO 898-1
Weld Type	CO2 Shielded Arc	AWS E71T-1C	AWS D1.1, GB/T 5117

Parameter	45m Configuration	90m Configuration	120m Configuration
Base Width	12.0m	15.5m	18.0m
Top Width (Cross-arm Center)	2.5m	2.5m	2.5m
Section Length (Shipping)	6.0m	6.0m	6.0m
Weight per Meter	850 kg/m	1,050 kg/m	1,200 kg/m
Total Weight (Approx.)	38.5 tonnes	95.0 tonnes	145.0 tonnes
Container Load (40HQ)	22-24 sections	20-22 sections	18-20 sections

2,850 kN Maximum Vertical Load
(Compression)

SF: 1.5 (Normal)

185 kN Transverse Wind Load
(45m/s Gust)

SF: 1.5 (Normal)

320 kN Longitudinal Load
(Broken Wire)

SF: 1.2 (Emergency)

45 kN·m Torsion Resistance
(Twist Load)

SF: 1.0 (Construction)

Environmental Factor	Standard Rating	Extended Option	Notes
Operating Temperature	-40°C to +50°C	-50°C to +60°C	High-temp paint available
Relative Humidity	100% RH	100% RH (Coastal)	Duplex coating option
Altitude	≤2,000m	≤4,500m	Ice load compensation
Wind Zone	45 m/s basic speed	50 m/s / 55 m/s	Site-specific analysis
Seismic Rating	Zone 8 (China GB)	Zone 9 / Special	IEC 60068 compliant
Corrosion Category	C3 (Industrial)	C5-M (Marine)	ISO 9223 classification

Engineering & Manufacturing Excellence

Material Selection

Q420B/Q460C structural steel sourced from certified mills with EN 10204 3.1 mill certificates. Chemical composition and mechanical properties verified per batch.

CNC Fabrication

Precision angle steel punching and cutting with ±1mm tolerance. Automated marking for traceability. Hole diameter tolerance ±0.5mm per GB/T 2694.

Welding & NDT

CO2 shielded arc welding by AWS D1.1 certified welders. 100% ultrasonic testing on main leg welds. Magnetic particle inspection for critical joints.

Hot-Dip Galvanizing

ISO 1461 compliant zinc coating. 86-120μm thickness per environment. Chromate passivation for tropical climates. Salt spray tested 2,000+ hours.

Quality Assurance

Dimensional inspection, pre-assembly trial at factory, assembly mark verification. Anti-corrosion packaging optimized for sea freight.

Proven Performance in Southeast Asia

Real-world deployment validating engineering excellence across challenging tropical environments

Malaysia transmission tower installation near Petronas facility

2022 86 Units

Malaysia Transmission Expansion

Deployed along Petronas-adjacent corridor with monsoon-resistant design validation. Tower footprint optimized for limited right-of-way in industrial zone.