This part of IEC 44 applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz.
Although this standard relates basically to transformers with separate windings, it is also applicable, where appropriate, to auto-transformers. This standard does not apply to transformers for use in laboratories.
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 3 to 11 apply to these transformers and a few references to them are included in those clauses (e.g. see 2.1.4, 5.1.1, 5.2, and 11.2).
Clause 13 covers the requirements and tests, in addition to those in clauses 3 to 12, that are necessary for single-phase inductive protective voltage transformers. The requirements of clause 13 apply particularly to transformers which are required to have sufficient accuracy to operate protective systems at voltages that occur under fault conditions.
Instrument transformers (ITs) are considered to be passive elements.
NOTE For outdoor ITs having voltages ≥ 123 kV the RIV measurements are suitable to cover the requirements of the EMC Directive. For a guidance of the test procedure EN 60694:1996, §6.3 might be followed.
Three-phase inductive voltages transformers are covered by HD 587 S1.
BS EN 60044-2:1999 history
2012BS EN 61869-3:2011 Instrument transformers. Additional requirements for inductive voltage transformers
1999BS EN 60044-2:1999 Instrument transformers - Inductive voltage transformers