The Enviro-tec PE-10-5105 Transformer is a step-down transformer that has been to take a standard primary voltage of 277V down to a secondary voltage of 24V with a power capacity of 50VA. It has been widely used as the power supply transformer of HVAC systems to provide low voltage circuits to some of the components such as thermostats, relays, gas valves. It also confirms safe and re... https://www.partshnc.com/pe-10-5105-enviro-tec-277vpri24vsec-50va-transfmr