HPS | Hammond Power Solutions, Control Transformers, Low-Voltage Transformers, Medium-Voltage Transformers, Potted Transformers Dry-type transformer, Autotransformer, Buck-boost transformer, control transformer, automation transformer, drive isolation transformer, encapsulated transformer, distribution transformer, K-Factor transformer, Power transformer Hammond Power Solutions Inc. is the largest manufacturer of dry-type transformers in North America supporting clients in oil and gas, mining, steel, waste and