DS/IEC 542+Amd.1:1990

The standard assists the selection of suitable on-load tap-changers for use in conjunction with the tapped winding of transformers or reactors. This publication should be read in conjunction with publication 214: On-load tap-changers, and publication 76: Power transformers. It gives field service advice concerning safety of operation, parallel operation, contact erosion and oil contamination, also comprehensive details for accompanying enquiries and orders.