Pioneer manufactures Submersible Transformers up to 5 MVA at 34,5 kV. Units can be designed for either vault-type or subway-type applications. Units are then surface grid-blasted, painted using a rich zinc primer and a two-component epoxy-polyamide coating for added corrosion resistance. External hardware is stainless steel and/or silicone bronze. All units comply either with the latest CSA or IEEE standards.