ISO DIS 5826.2

Abstract

This International Standard gives specifications applicable to all transformers for resistance welding equipment with or without connected rectifier. <br>The following types are included: <br>-&#160;single-phase transformers for alternating welding current, typically operating at 50 Hz or 60 Hz; <br>-&#160;single-phase transformers with connected rectifier typically operating at 50 Hz or 60 Hz; <br>-&#160;single-phase inverter welding transformer with connected rectifier typically operating at 400 Hz to 2 kHz; <br>-&#160;three-phase transformers with connected rectifier typically operating at 50 Hz or 60 Hz. <br>NOTE 1 Typical operating frequencies are given for information only and are not exclusive. <br>For the purposes of this International Standard, a transformer can refer to the transformer alone or combined with other components such as a rectifier, as listed above. <br>This International Standard applies to transformers built to protection class I or II according to IEC 61140. <br>NOTE 2 This International Standard provides fundamental requirements that can be supplemented by other resistance welding transformer standards e.g. ISO 22829 and ISO 10656.