Up to 765kV Capacity

EHV Substation & Switchyard Works

We deliver comprehensive switchyard engineering and erection contracting solutions for outdoor Air-Insulated Substations (AIS) and Gas-Insulated Substations (GIS). Our execution scope includes:

  • Precision rigging, sliding, and structural alignment of massive EHV power transformers and reactors.
  • Erection of heavy-duty utility circuit breakers, current transformers (CT), potential transformers (PT), and lightning arresters.
  • Rigid and flexible busbar installations, post-insulator adjustments, and electrical clearance calibrations.
  • Staging and synchronization of gantry structures with central grid control panels.
EHV Substation & Switchyard Works
High-Voltage Transmission Networks

EHV Transmission Line Works

Backed by technical promoters with extensive transmission line experience, we build high-capacity lines that form the spine of the state grid. Our execution scope includes:

  • High-precision concrete casting and excavation for heavy EHV tower foundations (suspension and tension towers).
  • Structural steel tower assembly, erection, and mechanical torque inspections.
  • Conductor stringing, dragging, and precision sagging under specified structural tensions.
  • Insulator string assemblies, corona ring alignments, and utility gantry terminations.
EHV Transmission Line Works
Heavy Mechanical Staging & Rigging

Structure Erection & Heavy Rigging

We specialize in heavy-load rigging and structural mechanical erection under tight site space constraints and demanding physical conditions. Our execution scope includes:

  • Erection of structural steel columns, beams, lighting masts, and switchyard gantries.
  • Rigging support for heavy substation equipment utilizing high-capacity mobile cranes and specialized pullers.
  • High-precision structural steel leveling and alignment meeting rigid millimetric tolerances.
  • Installation of monorail structures, fire-fighting pipe staging, and miscellaneous support rigs.
Structure Erection & Heavy Rigging
Class-A Grounding & Civil Substructures

Civil & Electrical Grid Infrastructure

We build robust civil foundations and electrical earthing systems that safeguard equipment from faults and support massive loads. Our execution scope includes:

  • Excavation and welding of Main Grid MS steel grounding flats (75x10mm or custom size) for sub-1 ohm grounding grids.
  • Earthing chamber casting, soil resistance treatments, and post-commissioning earthing reports.
  • Transformer RCC plinth casting, firewall masonry barriers, and cable trench grid networks.
  • Control room civil layouting, cable tray brackets mounting, and gantry base civil grouting.
Civil & Electrical Grid Infrastructure
CRP Panel wiring & Multi-Core Dressings

Cabling, Glanding & Control Panel Terminations

Our electrical cabling division handles multi-core control wiring, high-tension power cables, and delicate fiber lines with equal ease and precision. Our execution scope includes:

  • Laying, tensioning, and routing of EHV Power AI XLPE cables, LT cabling, and control panels cabling.
  • Outdoor cable trench laying, sand cushioning, tile coverage, and cable tray bracket layouts.
  • Substation Control Room CRP Panel cabling, cable glanding, dressing, and tag markings.
  • High-reliability multi-core control wiring terminations and Optical Fiber Cable (OFC) splicing.
Cabling & Control Panel Terminations

Interactive EHV Estimator

A client-facing precision estimator tool. Select your voltage specification, distance span, and scope of work to instantly calculate your estimated bill of materials and schedules.

EHV Material & Schedule Calculator

Provide your technical parameters below to generate a professional engineering report.

10 km
Calculated Ballpark Report

DIEPL Estimate Summary

Calculated Bill of Materials

Resource & Schedule Projection

Grid Class 400kV EHV Grid
Total Route Span 10 km
Projected Staged Duration 6.5 Months
Recommended Technical Manpower 45 Crew members

Note: This is a mathematical ballpark estimate based on standard specifications. The actual material lists depend on soil resistivity index, gantry spans, and client drawing approvals.

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