Galvanic Isolation

Galvanic isolation in a UPS context refers to the use of an output transformer between the inverter and the load. Because the transformer couples power magnetically, there is no direct electrical connection — DC faults, fault currents, or earth references on the input side cannot directly propagate to the load. The Standby Systems medical page calls this out as a feature of the Master MPS and Master HP ranges and uses the phrase “galvanically isolating the inverter from the user’s load.”

In medical and some industrial deployments, isolation is required by regulation or strongly preferred for safety. The trade-off is mass, audible noise, and lower full-load efficiency relative to high-frequency transformerless designs — see High-Frequency Topology.

Connections

Sources