We are out of 4.16kV capacity but have ample 13.8kV (impedance grounded) available. We have a need to add 3-5 2000-3000 HP motors to serve chiller compressors. One path we are considering is 13.8kV motors rather than new 4.16kV switchgear. I am hesitant to move in this direction, mostly from a lack of experience with motors of this voltage class. I've heard 13.8kV motors are more expensive, harder to source parts and are more susceptible to partial discharge. Does anyone feel those challenges are worth the savings of new transformers and switchgear?