Diseases that vaccines prevent can be. dangerous, or even deadly. Vaccines greatly. reduce the risk of infection by working with. the bodyâs natural defenses to safely develop. immunity to disease. This fact sheet explains. how the body fights infection and how. vaccines work to protect people by. producing immunity.
Low Voltage Transformers. 1  A low voltage transformer literally transforms the standard line voltage in your home or business (120 or 277 volts) to a lower 12 or 24 volts. This lets you safely supply power to popular low voltage lighting systems like recessed can lights, pendant lights, puck lights and outdoor light fixtures. 123.
1 Transformers âstep upâ or âstep downâ voltage according to the ratios of primary to secondary wire turns. 2  A transformer designed to increase voltage from primary to secondary is called a step-up transformer. A transformer designed to reduce voltage from primary to secondary is called a step-down transformer. 2  The transformation ratio of a transformer will be equal to the square root of its primary to secondary inductance (L) ratio.