Abb Limited [Oil and Gas] manufactures Dry-type Solid-cast Current Transformer. Abb Limited [Oil and Gas] is an ISO 9001 certified company. Abb Limited [Oil and Gas] also offers various types of types of transformers and sensors. The Multi-Ratio Externally Mounted Bushing Current Transformer, Model PS-981, operates with high accuracy for metering or relay applications. The Multi-Ratio Externally Mounted Bushing Current Transformer is ideal for old electrical substation equipment. The Multi-Ratio Externally Mounted Bushing Current Transformer is a low voltage type transformer.