CA type outdoor rated oil-filled current transformers are based on a head type (top core) design. All our current transformers are built-to-order to customer specifications. CA current transformers can meet many applications for metering and protection with a number of dome sizes for up to six independent cores from 230 kV up to 800 kV. This current transformer is available with either porcelain or silicone rubber insulators, with ANSI 70 gray porcelain insulator considered as the standard product. Hermetic sealing of the design is accomplished using a stainless steel bellows to prevent free-breathing outside moisture-laden air, and also allows the unit to ship in the horizontal position.
The CA has demonstrated reliable performance in service with a very low field failure rate that is much lower than the industry average. This design has been installed all over the western hemisphere from desert to arctic climates.