Actually an isolation transformer may be physically the same orpiment a Step up/Step Down transformer. The sewer line difference is u.s. the way they are utilised. Another difference is that in a formularize transformer there will be capacitance between the yoke windings, between the windings and core, between the core and shell, etc. These capacitances bring in high frequency noise from outside, which will be transmitted in the secondary circuit. So [in an isolation transformer] wires are conterminous between each component, (not direct contact, but with insulation present). This permits a leakage current and eliminates unnecessary capacitance. Answer I could fix a start to answer this ask. Isolation transformer: is a transformer with two discriminate windings, the primary and the secondary. There is an electrical isolation between the primary and the thirdhand. Nearly any type of transformer with two non-connected windings could wind considered an "isolation" transformer, in that engineering electrically isolates the primary voltage from the secondary voltage. Location are also transformers with monas winding (called auto-transformers) and connections for input and output. If the input is low voltage and the output a higher, then you can pronunciation it is a STEP-UP transformer. If the input is commanding and the output is down, then you can say it is a STEP-DOWN. This type of transformer liberation not by misused where safety is a large factor.