Switchyard Design & Consulting for 11kV to 400kV Grids
Delivering robust, safe, and compliant switchyard and substation engineering from 11kV up to 400kV. We ensure seamless grid integration, superior protection coordination, and turnkey design excellence.
- CEA, IEC & IS Compliant
- Relay & Earthing Studies
- SCADA & SAS Integration
Substations
Clash-Free, Grid-Compliant Substation Engineering
Transmission infrastructure is the backbone of every utility-scale solar park, BESS facility, wind farm, and industrial plant. Led by seasoned HV specialists with up to 15 years of domain experience, our Switchyard Division delivers precision-engineered designs built for supreme reliability.
- Complete SLD, general arrangement (GA) & section drawings (11kV–400kV)
- Short-circuit, load flow, relay coordination & IEEE-80 earthing studies
- Equipment sizing (Power Transformers, CT, PT, CB, Isolators, LA)
- SCADA/SAS architecture, PLCC/FO communication & commissioning support
Substations & Systems We Engineer
11kV / 33kV Pooling Yards
66kV / 132kV Substations
220kV / 400kV EHV Yards
AIS & GIS Switchyards
RE & BESS Evacuation
Bay Extensions & Retrofits
Comprehensive Switchyard Services
Precision engineering and end-to-end technical support for reliable power evacuation and transmission.
Layout & SLD Design
- Feasibility assessment & capacity expansion planning
- Layout & section design for 11kV to 400kV switchyards
- Single-Line Diagram (SLD) & protection SLD preparation
- Advanced busbar arrangement & phase-clearance design
Protection & Safety
- Protection philosophy & numerical relay coordination
- Earthing & grounding mat design (IEEE-80 / IS-3043)
- Direct stroke lightning protection (DSLP) & safety studies
- CEA, STU/CTU & utility compliance audits
Equipment & Integration
- Electrical equipment sizing & selection (PTR, CT, PT, CB, LA)
- Power & control cable routing and trench layout modeling
- SCADA, SAS & telemetry communication integration
- Vendor GTP/drawing review & technical approval
Execution & Commissioning
- Technical BOQ, BOM & tender specification preparation
- Gantry, tower & equipment foundation civil support
- On-site supervision, inspection & QA/QC audits
- Pre-commissioning testing & grid charging support
Need a Switchyard Design or Bay Extension?
Share your plant capacity, evacuation voltage level (11kV–400kV), and grid connectivity details. Our HV engineers will outline the complete design package and timeline.
Request Switchyard ProposalSwitchyard Engineering Deliverables
Complete primary, secondary, civil, and automation design packages ready for utility approval and site construction.
Primary Engineering & Layouts
- Main Single Line Diagram (SLD) & Metering/Protection SLD
- Switchyard Plan, Elevation & Cross-Section Drawings
- Busbar Sizing, Short-Circuit Force & Cantilever Pull Calc.
- Clearances, Erection Key Diagrams & Illumination Design
Protection, Earthing & Studies
- ETAP Load Flow, Short-Circuit & Relay Coordination
- Earth Mat Design Calculation & Layout (Step/Touch Potential)
- Direct Stroke Lightning Protection (DSLP) Calculation & Layout
- CT/PT Sizing, Battery & Charger Sizing, AC/DC Aux. SLD
Civil, Structural & Trenching
- Gantry Towers, Beams & Equipment Support Structure Design
- Power Transformer Foundation, Soak Pit & Firewall Design
- Control Room Building, Cable Trench & Road/Drainage Layouts
- Gravel Spreading, Chain-Link Fencing & Civil BOQ
SCADA, SAS, BoQ & Vendor Review
- Substation Automation System (SAS) & SCADA Architecture
- Control & Relay Panel (CRP) Schematics & Cable Schedules
- Technical Specifications, Bill of Quantities (BOQ) & Tender Docs
- Vendor GTP / Drawing Review & Factory Acceptance Test (FAT) Support
Glimpse of Our Switchyard & Substation Projects
Click an image to enlarge
Our Switchyard Engineering Process
From initial grid connectivity assessment to final charging and synchronization, we ensure flawless execution.
Assessment
Site surveys, soil resistivity, load flow analysis, and grid feasibility studies.
Design & Eng.
SLD creation, GA/section layout planning, earthing, and protection coordination.
Procurement
BOQ generation, equipment technical specs, and vendor GTP/drawing reviews.
Commissioning
On-site supervision, SCADA/SAS integration, testing, and final grid charging.
Engineering software & standards we work with
Why Partner with Devyom for Switchyard Design?
High-voltage engineering requires zero margin for error. We bring decades of combined electrical, civil, and protection expertise to ensure your substation infrastructure is resilient, safe, and future-proof.
Safety-First Approach
Rigorous earthing, phase-to-earth clearance, and relay coordination studies to protect assets and personnel.
Modern Automation
Seamless SCADA, SAS, and telemetry integration for real-time monitoring, SLDC reporting, and remote control.
Vendor-Neutral
Unbiased equipment sizing and specifications ensuring optimal CAPEX and long-term operational reliability.
End-to-End Delivery
From the initial SLD and civil foundation design to final CEIG/utility approval and grid energization.
Switchyard Engineering FAQs
What voltage levels do you cover for switchyard and substation design?
We provide complete primary, secondary, and civil engineering for switchyards ranging from 11kV and 33kV pooling stations up to 66kV, 132kV, 220kV, and 400kV Extra High Voltage (EHV) substations—covering both Air Insulated (AIS) and Gas Insulated (GIS) configurations.
Do you handle both Electrical and Civil/Structural design for switchyards?
Yes. Because Devyom Technologies houses dedicated HV Electrical, Civil/Structural, and Survey divisions under one roof, we deliver a unified package including gantry towers, equipment foundations, transformer soak pits, cable trenches, control room buildings, and electrical layouts without inter-contractor clashes.
Can you assist with vendor drawing approvals and CEIG / utility compliance?
Absolutely. We prepare technical specifications and BOQs for procurement, review vendor Guaranteed Technical Particulars (GTP) and manufacturing drawings, and ensure all layouts and protection schemes comply with CEA, STU/CTU, IEC, and IS norms.
What inputs are required to start a switchyard design project?
Typically, we need your plant capacity, grid connectivity approval letter (fault level, voltage level, bay allocation), topographical & geotechnical survey reports (which we can also conduct), and plot boundary coordinates.
Ready to Engineer Your 11kV–400kV Switchyard?
Speak with our Technical Director and HV specialists to scope your substation design, protection study, or turnkey execution.