It provides many safety, economic, and environmental advantages without compromising the mechanical and electrical integrity of conventional oil-cooled transformers. Our CRTs can be installed indoors or within a metal enclosure (IP 20 or IP 21). With its flame resistant/retardant material, it is safe near load centers and populated areas. SINTRA has already supplied its first 800 kVA x 2 units to the B-Residence apartment building in Serpong, with many more projects in progress.