Advanced EHV layouts
Comprehensive physical and electrical design for 500 kV Gas Insulated Switchgear (GIS) and Air Insulated Switchgear (AIS) substations.
Energy & Power
Grid stations
DMC designs and supervises extra-high-voltage grid stations up to 500 kV, covering GIS and AIS substation layouts, heavy-duty transformer and reactor bays, insulation coordination and surge protection, IEEE 80-compliant earthing grids, and IEC 61850 substation automation with redundant fibre-optic communication.
At 500 kV there is no margin for error. DMC is among a small tier of engineering practices capable of designing and supervising Extra-High-Voltage grid stations — the massive transmission nodes, heavy industrial interconnections and national grid interfaces on which everything downstream depends.
Our team delivers specialised engineering for seamless power flow, dynamic stability and robust system protection, from physical layout through to the automation and interlocking logic that governs how the station behaves under fault.
Core technical capabilities
Heavy-duty transformer bays
Precision engineering for ultra-high-capacity 500 kV power auto-transformers, reactor bays and specialised cooling arrangements.
Insulation and shielding
Insulation coordination, lightning surge protection layouts and corona ring optimisation designed for the voltage stresses EHV plant actually sees.
EHV grounding grid
High-precision earthing matrix design to IEEE 80, managing fault current distribution and safeguarding both structures and personnel.
Automation and interlocking
Protection schemes built on IEC 61850 Substation Automation Systems (SAS), with redundant high-speed fibre-optic communication loops.
Also in Energy & Power
EHV work is a references business.
No utility awards a 500 kV commission on a brochure. Tell us the scheme and we will send the relevant project references, the CVs of the engineers who would lead it, and an honest assessment of where we would want a specialist partner alongside us.
Common questions
Frequently asked questions
What voltage levels does DMC design grid stations for?
Up to 500 kV, covering both Gas Insulated Switchgear (GIS) and Air Insulated Switchgear (AIS) substations, including transformer and reactor bays and terminal arrangements for incoming transmission lines.
Which standards does DMC apply to grid station earthing?
Earthing grids are designed to IEEE 80, sized to manage fault current distribution and to keep step and touch potentials within safe limits for both structures and personnel.
Does DMC design substation protection and automation?
Yes. Protection schemes are built on IEC 61850 Substation Automation Systems with redundant, high-speed fibre-optic communication loops, including interlocking logic governing station behaviour under fault.