Profile: Para-Line Transformer Co., Inc. manufactures a wide variety of power transformers. The SS series transformer has a single 120V primary and a single center tapped secondary. It is also available with 240V or 480V primary. It also provides a wide range of selection in small 120V primary power transformers (47-63Hz). The TT series includes a number of coupling transformers, holding coils and telephone associated devices for use in interconnective data modem terminals. Transformers for data modem terminals designed to exceed 1200 VAC breakdown requirements. We also offer meters, transducers and battery monitors.