Project: Resistive Dolomite Bedrock in Missouri, USA
The Challenge: To provide an effective grounding solution, as installing sufficient grounding at the electrical substation, in Hollister, Missouri, had proven to be a challenging task, due to the minimal overburden over highly resistive dolomite bedrock.
The SAE SOLUTION: SAE used specialized test equipment and CDEGS software to design and install a deep vertical solution to meet the utility grid design requirement. Conductive backfills ConduCrete and ConduForm were recommended and install by SAE, as a means to provide a more effective ground.
Project: Barrie-Simcoe Emergency Services Campus in Ontario, Canada
The Challenge: To design and install the electrical grounding system for the main power transformer and communications tower at the new Barrie-Simcoe Emergency Services Campus located in Barrie, Ontario.
The SAE SOLUTION: By utilizing SAE’s innovative design methods and products, our technical team designed and facilitated the installation of an effective grounding system with a smaller footprint than the large ground grid that was previously designed – ultimately providing significant cost savings to the client.
Project: T-Mobile US in New Jersey, USA
The Challenge: To review existing grounding and provide recommendations for system expansion at Wayne, New Jersey Switching Center.
The SAE SOLUTION: SAE performed a grounding audit for the existing facility, finding a non-single point interior grounding system with several loops that posed a threat for equipment damage in the event of a power surge or lightning strike. Soil resistivity testing was performed onsite in order to determine the appropriate amount of exterior grounding to achieve the T-Mobile target value of 5 ohms. In combination with expansion design drawings provided by T-Mobile, SAE designed a single point grounding layout for the existing facility and new expansion. The interior design provided bonding of all equipment in an efficient routing to a new master ground bar. For the exterior grounding, SAE modelled the soil resistivity data and designed a vertical ground well that achieved less than 5 ohms resistance. Upon review of the grounding design and recommendations, T-Mobile awarded the supply and installation for the new grounding to SAE. All interior renovations for grounding, bonding and the installation and connection of the exterior ground well was completed by SAE.
Project: Bell Mobility Transmission Sites on Hydro One Towers in Ontario, Canada
The Challenge: Bell Mobility posed SAE with a very challenging electrical grounding issue, to perform electrical grounding studies on 10 transmission sites that were located on Hydro One power line towers. Upon extensive examinations regarding grounding design and implementation held between SAE, Bell Mobility, and Hydro One it was determined that a revised grounding design was required.
The SAE SOLUTION: SAE subsequently developed site-specific grounding designs utilizing grounding grids and ground wells enhanced with ConduCrete together with high resistivity finished grade surface treatments and isolation transformers. The designs were reviewed on a site by site basis by Hydro One and approved. Grounding systems on sites with high voltage power line right-of-ways in both Mississauga and Etobicoke, Ontario have since been constructed by SAE.
Project: Rail House, USA
The Challenge: Reliability of railway sensors and signals is paramount. The customer desired a more effective and simpler solution that would offer long-term resilience. With this is mind, a better performing, more cost effect solution was presented. Through a trial, they compared the ConduDisc and ConduWire grounding system with their existing ground rod standard. This head-to-head comparison enabled the customer to validate the speed and ease of installation, as well as the resistance to ground performance of the two systems.
The SAE SOLUTION: ConduDisc and ConduWire grounding system was installed below the building legs, eliminating the need for additional ground rod driving and trenching for the ground ring. This resulted in a more efficient installation process by reducing time on site, while also reducing the possibility of personnel injury associated with driving ground rods. Soil resistivity in the area was found to be very low, indicating the possibility of rapid corrosion of any unprotected metal in the ground. The ConduDisc and ConduWire grounding system will ensure this corrosion does not occur, while providing a resistance to ground value better than the existing company standard.
Project: Rocky Terrain in Connecticut, USA
The Challenge: SAE was approached to provide a grounding solution for a transmission line application in Connecticut that was posed with the challenge of grounding in areas with rocky conditions.
The SAE SOLUTION: By using SAE’s ConduCrete and ConduForm enhanced solutions we were able to provide a more effective grounding system, as it reduced the length of counterpoise required to meet utility performance targets and environmental / geographical restrictions.
Project: Trip Ground Impedance in Alberta, Canada
The Challenge: SAE was contacted with regards to achieving the targeted trip ground impedance levels on one of the utility’s circuits, in Alberta.
The SAE SOLUTION: SAE’s ConduDisc, ConduFlow and ConduCrete were used to successfully create an effective and easy to install grounding solution.