The Institute for Standardization of Bosnia and Herzegovina, through its Technical Committee BAS/TC 8, Insulation coordination, high-voltage testing, and instrument transformers, has adopted the second edition of BAS EN 61869-3:2025, Instrument transformers – Part 3: Additional requirements for inductive voltage transformers, by translation method. This edition is a translation of the English version of the European standard EN 61869-3:2011.

BAS EN 61869-3:2025, which is part of the IEC 61869 series, applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz.

All transformers shall be suitable for measuring purposes, but, in addition, certain types may be suitable for protection purposes. Transformers for dual-purpose of measurement and protection shall comply with all clauses of this standard.

NOTE: Requirements specific to three-phase voltage transformers are not included in this standard; but, so far as they are relevant, the requirements in clauses 4 to 10 apply to these transformers, and a few references to them are included in those clauses.

The original texts of the standard were prepared by the International Technical Committee IEC/TC 38, Instrument Transformers.