Current transformer

Current transformers are mainly used where currents cannot be measured directly can be measured directly. They are special forms of transformers that the primary current into a (usually) smaller, standardized secondary current of a certain Accuracy (class) and galvanically separate the primary and secondary circuits from each other. The physically induced saturation phenomenon of the Material also ensures that the secondary circuit is protected against excessive currents high currents.

A basic distinction can be made between single-core current transformers and Winding current transformers. The most common representative of the single Current transformers is the plug-on current transformer, which is plugged onto the current-carrying conductor and thus forms a transformer with a primary winding (and secondary windings Secondary windings according to the transformation ratio).