Square D offers three models of voltage transformers, each suited for a particular application. Model 450R is designed for applications requiring accurate voltage measurement within the 0.3% accuracy class. Model 450R is ideal for switchboard use with 1% instrumentation. Model 460R is designed for voltage indication where accuracy is less critical or where burden requirements are low. Model 460R is ideally suited for use with transducers and panelboards, and other monitoring applications. This voltage transformer has a ratio of 4/1. This transformer is a 1 phase and a NEMA 1 degree of protection. This transformer has a rated power of 150 VA with a 480 Vprimary voltage with a 120 V secondary voltage. This product complys to UL listed.