Schmidbauer Transformer and Toolbuilding GmbH

1 Phase Autotransformer

1 Phase Autotransformer

typical applications

1 phase pre-circuit transformer according to IEC/EN61558-2-13 (autotransformer) for general applications without the need of a galvanic isolation, e.g. for transforming typical mains voltage to other voltages needed by tools, machinery or other devices.

VT pre-circuit transformers and other autotransformers do not provide any electrical protection due to the lack of galvanic isolation between input and output windings.

Specifications

Pre-circuit transformers provide windings suitable for following configurations:

• 0 V … 110 V / 115 V
• 127 V / 133 V
• 220 V / 230 V
• 240 V

These terminals can be used either as input- or output voltage terminals. Output winding must provide external fuse for safety reasons (see table for details)

• Terminal tag connections
• Vacuum impregnation in polyester varnish – low operating noise.