Substation Grounding
Complete grounding system design and analysis for transmission and distribution substations.
Service Overview
Substation grounding is one of the most critical safety systems in any electrical power facility. A properly designed substation grounding system protects personnel from dangerous step and touch voltages during fault events, provides a low-impedance path for fault currents, and ensures the reliable operation of protective relaying and equipment.
E&S Grounding Solutions has designed grounding systems for transmission and distribution substations of all voltage classes — from 12 kV distribution substations to 500 kV extra-high-voltage transmission substations. Our engineers use CDEGS computer modeling software, the same tool used by major electric utilities worldwide, to develop grounding designs that meet IEEE 80 safety requirements and the specific needs of each project.
Every substation grounding design we deliver includes a comprehensive soil resistivity analysis, multi-layer soil modeling, fault current analysis, step and touch potential calculations, and a full set of engineering drawings stamped by a licensed professional engineer.
Key Benefits
- IEEE 80 compliant grounding system design for all voltage classes
- CDEGS computer modeling for accurate safety analysis
- Step and touch potential analysis included in every design
- Multi-layer soil structure modeling from Wenner four-pin test data
- Fault current analysis and ground potential rise calculations
- Stamped engineering drawings and certificate of compliance
Ready to discuss your project?
+1 310-318-7151Our Process
Site Assessment
Review of substation layout, equipment specifications, fault current levels, and existing grounding.
Soil Resistivity Testing
Wenner four-pin soil resistivity measurements at the substation site.
CDEGS Modeling
Complete grounding grid modeled in CDEGS with multi-layer soil structure and fault current inputs.
Safety Analysis
Step and touch potentials calculated and compared against IEEE 80 tolerable limits.
Design & Drawings
Grounding grid design optimized for safety and constructability; stamped engineering drawings prepared.
Report & Certification
Comprehensive engineering report with analysis results, design specifications, and certificate of compliance.
Standards & Codes
Industries Served
Related Technical Articles
How to Calculate Fault Current in Electrical Substation Grounding Design
Fault current calculation is the essential first step in every substation grounding design. Learn the method used by engineers to size the grounding system and meet IEEE 80 requirements.
What is Step and Touch Potential and Reducing Resistance to Ground?
Step and touch potential are the primary safety metrics in substation grounding design. Learn how they are calculated and reduced to safe levels per IEEE 80.
What Is Ground Potential Rise and Earth Potential Rise?
GPR analysis is required for every substation grounding design. Learn what ground potential rise means, how it is calculated, and how it affects personnel and equipment safety.
The Grandfathering Myth: What Older Substations Must Know About 29 CFR 1910.269
Many substation owners believe older facilities are exempt from modern grounding standards. Learn why the grandfathering myth is dangerous and what OSHA actually requires.
Frequently Asked Questions
What standards govern substation grounding design?
Substation grounding design is governed primarily by IEEE 80 (Guide for Safety in AC Substation Grounding), which specifies the methodology for calculating tolerable step and touch potentials, sizing ground conductors, and designing the grounding grid. NFPA 70 (NEC), IEEE 142, and NERC FAC-001 also apply depending on the facility type and voltage class.
What voltage classes does E&S Grounding Solutions design for?
E&S Grounding Solutions has designed grounding systems for substations ranging from 12 kV distribution substations to 500 kV extra-high-voltage transmission substations. Our engineers are experienced with all voltage classes and utility interconnection requirements.
Does a substation grounding design include stamped drawings?
Yes. Every substation grounding design delivered by E&S Grounding Solutions includes a comprehensive engineering report and a full set of construction drawings signed and stamped by a licensed Professional Engineer (P.E.), accepted by utilities and AHJs nationwide.
How often should substation grounding be tested and updated?
IEEE 80 recommends periodic testing and review of substation grounding systems, especially after changes to fault current levels, substation expansion, or soil disturbance. E&S Grounding Solutions provides grounding system testing and analysis services to verify that existing systems continue to meet safety requirements.
Request a Substation Grounding Proposal
Contact our team of licensed engineers to discuss your project requirements and receive a customized proposal.