Rated Power Equivalent

The term “Typenleistung,” or Rated Power Equivalent, doesn’t refer to a direct electrical size. It is used as a guideline to estimate the space requirements and weight of transformers, representing a common equivalent between a transformer core type and electrical power under simplified conditions (e.g., 50Hz, ta=40°C).

The actual output power that can be achieved with a particular core type depends on various factors, such as the ambient temperature, maximum permitted component temperature, core material, operating mode, cooling situation, number of output windings, number of primary voltages, maximum open-circuit voltages, insulation requirements (type of transformer) and others.

Note:
Users should note that the desire for multiple input voltages often leads to a larger transformer type compared to a transformer of identical output power designed for only one input voltage. A “universal transformer” is thus often not economical. Likewise, designing the transformer for a higher than realistically expected ambient temperature leads to larger types.

See also: Rated power, Throughput power