Earthing Design & Calculation Study

Objective

Designing and calculating effective earthing systems is vital for ensuring safety, compliance, and the integrity of equipment. This study focuses on developing grounding solutions that adhere to Australian standards, including AS/NZS 2067, AS/NZS 3007, and IEEE80. Our primary objective is to mitigate hazards such as step and touch voltages while providing reliable grounding for safe and effective system operation.

Methodology

• Soil Resistivity Analysis: We use site-specific soil resistivity measurements to design grounding systems tailored to local conditions.
• Ground Grid Design: We calculate the required grid size, conductor specifications, and depth to meet the target ground resistance and ensure
compliance with Australian standards.
• Safety Hazard Simulation: We simulate fault scenarios to assess step and touch voltages, ensuring they remain within acceptable safety limits.

Examples

For a HV substation located in a high soil resistivity area, we designed a grounding system using a combination of buried conductors and vertical ground rods. The system achieved a ground resistance below 1 ohm, meeting safety requirements and ensuring compliance with standards.
We developed the earthing designs for several solar farms, integrating large ground grids with strategically placed rods to manage high fault currents. The designs mitigated step and touch voltage hazards.
For brown field projects, we designed robust earthing systems to handle fault currents from generators, transformers, and motors.

Through precise design and adherence to regulatory requirements, we deliver grounding systems that ensure personnel safety, equipment protection, and reliable system operation under diverse conditions.

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