Niagara Transformer Corp. niagara transformer, liquid-filled transformers, dry-type transformers, cast coil, power generation, utilities power, transmission and distribution, niagara transformer corporation, niagra, niagra transformers, rectifier duty Niagara Transformer manufactures liquid-filled, dry-type, cast-coil and grounding transformers, reactors and voltage regulators for power generation and utilities, transmission and distribution, industrial applications, and other specialize purposes.