Steel Towers that Carry the Grid — 33 kV to 765 kV
ENSOL designs and fabricates lattice and tubular transmission line towers — suspension, tension, angle, dead-end and special crossing types — hot-dip galvanised to IS 802 for utilities and EPC contractors across India.
What is a transmission tower?
A transmission line tower is the steel backbone of the power grid — a tall lattice or tubular structure that holds overhead conductors and earth wires at safe clearances across long distances. ENSOL has fabricated this steel since 1981, for lines from 33 kV sub-transmission up to 765 kV EHV.
Where it's used
Inter-state transmission, renewable evacuation, railway corridors and EPC line packages.
Why ENSOL
Four decades of grid steel, in-house galvanising and IS 802 engineering under one ISO 9001 system.
Applications
Conventional power, solar & wind evacuation, and river / railway crossings.
Advantages
Hot-dip galvanised durability, tested designs and full documentation with every consignment.
Six tower families, one engineering system
Suspension Towers
Tangent towers that carry the conductor in a straight line, supporting vertical and wind loads along the route.
Tension Towers
Angle towers that take up conductor tension where the line changes direction.
Angle Towers
Engineered for line deviation angles, balancing transverse loads at bends in the route.
Dead End Towers
Anchor towers that terminate the line at substations or section ends, taking full one-sided pull.
River Crossing Towers
Tall special towers spanning rivers with extended height and heavy loading.
Railway Crossing Towers
Towers engineered to clear railway corridors with the required vertical clearance.
Built for the line, tested for the grid
Lattice & Tubular Construction
Bolted lattice towers and tubular/monopole options engineered to the route and right-of-way.
33–765 kV Range
A full transmission portfolio from sub-transmission to 765 kV EHV lines.
IS 802 Design
Towers designed and detailed per IS 802 with IS 875 wind and reliability loads.
Hot-Dip Galvanised
86 micron standard / 130 micron marine-grade galvanising to IS 4759.
High Wind & Ice Loading
Engineered for site wind zones, reliability levels and special loading cases.
Full-Scale Tested
Prototype tower testing and proof-checking where the project specifies.
Transmission tower specifications
| Voltage range | 33 kV – 765 kV |
|---|---|
| Steel grade | IS 2062 E250 / E350 angles & sections |
| Galvanisation | Hot-dip, 86 micron standard / 130 micron marine (IS 4759) |
| Design standards | IS 802, IS 875, relevant IEC & utility specs |
| Tower types | Suspension, tension, angle, dead-end, crossing |
| Construction | Lattice (bolted) and tubular / monopole |
| Wind zone | Designed to site wind zone & reliability level |
| Loading | Vertical, transverse, longitudinal & broken-wire cases |
| Documentation | GA drawings, BOM, MTCs, galvanising reports |
Where our towers carry power
Power Utilities & Transcos
Inter-state and intra-state transmission lines.
Renewable Energy
Evacuation lines for solar and wind parks.
Railways
Traction and railway-corridor transmission.
EPC Contractors
Turnkey transmission-line packages.
Design to dispatch
- 01
Tower Design
Type, geometry and loading detailed to the line profile.
- 02
Structural Analysis
Analysis per IS 802 for all governing load cases.
- 03
Material & Cutting
IS 2062 steel selected; CNC / laser angle cutting.
- 04
Fabrication & Punching
Drilling, punching and forming of members.
- 05
Galvanizing
Hot-dip galvanising to IS 4759 for corrosion life.
- 06
Tower Testing
Proof-checking and full-scale testing where specified.
- 07
Dispatch
Bundled, marked and documented for site erection.
Checked at every stage
Raw Material Inspection
Mill test certificates verified on every steel lot.
Dimensional Inspection
Members checked against fabrication drawings.
Galvanizing Test (NABL)
Coating thickness and adhesion accredited testing.
Tower / Load Testing
Full-scale prototype testing where specified.
CPRI & Type Tests
Electrical type-tested equipment heritage since 1981.
Documentation
MTCs, galvanising reports and GA drawings issued.
Towers delivered across India
EHV Transmission Line Towers
Location: Pan-India
Client: POWERGRID
132 kV Substation & Line Steel
Location: Jammu & Kashmir
Client: Chief Engineer (J&K)
Sub-transmission Towers
Location: Chhattisgarh
Client: CSPTCL
Renewable Evacuation Lines
Location: Multiple states
Client: EPC Developers
A transmission partner, not just a supplier
Since 1981 ENSOL has built towers and isolators trusted by utilities and EPCs, many still in service today.
Every tower is analysed for all governing load cases and detailed to IS 802 with independent checking.
Hot-dip galvanising under one ISO 9001 roof with NABL-accredited testing — consistent corrosion protection.
POWERGRID MQP, CSPDCL/CSPTCL and CPRI heritage back the work with documented quality.
Approved, tested, accredited
ISO 9001:2015
Certified manufacturing
CPRI Type-Tested
33 kV – 245 kV heritage
POWERGRID MQP
Approved vendor
NABL Galvanizing
Accredited test — Pass
Transmission towers, answered
Common questions from utilities, transcos and EPC contractors.
A transmission line tower is a tall steel structure that supports overhead conductors and earth wires, holding them at safe electrical clearances above ground across long distances. ENSOL fabricates lattice and tubular transmission towers from 33 kV to 765 kV, hot-dip galvanised for decades of grid service.
ENSOL manufactures suspension (tangent) towers, tension (angle) towers, angle towers, dead-end (anchor) towers, special river-crossing towers and railway-crossing towers — each engineered for its specific line-routing and loading requirement.
Transmission towers are fabricated for the full spectrum from 33 kV sub-transmission up to 765 kV EHV lines, covering conventional power, renewable-energy evacuation and railway corridors.
Towers use structural steel angles and sections to IS 2062, designed per IS 802, and are hot-dip galvanised — 86 micron standard coating and 130 micron marine-grade for high-corrosion environments — for long maintenance-free life.
Yes. ENSOL operates an ISO 9001 system with NABL-accredited galvanising tests, and supplies utility- and EPC-approved towers with material test certificates, galvanising reports and, where specified, full-scale tower testing.
Yes. Tall river-crossing and railway-crossing towers are engineered to the specific span, clearance and loading of the crossing, with extensions and special bracing detailed to project drawings.
Related Power T&D solutions
Build your transmission line with ENSOL towers
Share your line profile, voltage class and tower schedule — our team responds with type design, fabrication and galvanising under one roof. Power T&D — Prashant · +91-99775-33990