Dual Earth Electrode System and Type B Buried Earth Ring

Project Overview

1. 50kA (10/350) Iimp Type 1 Surge Protection Device (SPD): A key feature of this upgrade is the installation of a Type 1 SPD, capable of managing lightning impulses of up to 50kA with a 10/350 µs waveform. This device is essential for protecting electrical infrastructure against lightning-related damages.

2. Dual Earth Electrode System with Type B Buried Earth Ring: The project incorporates a dual earth electrode system combined with a Type B buried earth ring. This configuration is designed to improve the dispersion of electrical currents, enhancing system safety and reducing the potential for faults.

3. Optimised Earth Resistance – 3.3 ohms: Achieving an earth resistance of 3.3 ohms is a significant aspect of the project, indicating effective dissipation of excess currents into the ground in the event of a fault or lightning strike.

4. Removal of Fortuitous Earths: The project also involved removing all fortuitous earths from the system to prevent unintended electrical current paths, thus minimising safety risks.

5. Parallel Calculation with Individual Rods – 2.9 ohms: Conducting parallel calculations with individual rods resulted in an earth resistance value of 2.9 ohms, further confirming the efficiency of the upgraded earth electrode system.