Shell Diala S4 ZX-I
Premium Inhibited Electrical Insulating Oil.
Shell Diala S4 ZX-I is the new electrical insulating oil from Shell designed to meet the challenges presented by the latest power transformers. It offers an extended oil life with the peace of mind of zero sulphur content. Shell Diala S4 ZX-I is manufactured from zero sulphur base oils produced using Shell’s GTL (gas-to-liquid) technology.
IEC 60296 (2012): Table 2 Transformer Oil (I) (Inhibited oil)