The 5mA Rule - A Significant Constraint for 765 kV Transmission

The NESC 5 mA rule is turning out to be a significant design constraint for the large number of 765 kV projects being proposed in North America at this time. More information about the NESC 5 mA rule is at this link. The POLARIS-EMF software is uniquely suited to help with this design effort. As customers have reached out to us for custom vehicle models to satisfy requirements of their respective transmission project jurisdictions, we’ve invested effort to refine the models and improve our process as much as possible. This includes using more advanced methods for pre-processing the models to improve accuracy given challenges associated with 3D numerical approximation. We encourage use of the latest model libraries. The revisions may only reduce calculated contact current by a couple of percent compared to previous models, but every bit helps given the costly nature of UHV type transmission projects. Please reach out to support@electricutilitytools.com if you have questions or wish to discuss this topic further.