Medical transformers are almost exclusively designed to act as isolation transformers. They offer a safe isolated output, have low leakage currents, and reinforced insulation. A safe isolated output is achieved by breaking the physical connection between the primary and secondary. In other words, the energy is transferred magnetically from the input to the output as opposed to conductively. By breaking this physical connection, the secondary is no longer referenced to ground (the secondary is “floating”) minimizing the shock hazard.