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IEC 60044-7 Ed. 1.0 b:1999
Instrument transformers - Part 7: Electronic voltage transformers
Applies to newly manufactured electronic voltage transformers with analogue output, for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. The standard covers optical arrangements with electronic components. Three-phase voltage transformers are not included, but some of the requirements apply.
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International Electrotechnical Commission [iec]
