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IEC 3C/952/FDIS

IEC 60417: Graphical symbol for use on small transformers 5948 Pr: Perturbation attenuation isolating transformer, general

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IEC 3C/953/FDIS

IEC 60417: Graphical symbol for use on small transformers 5949 Pr: Perturbation attenuation isolating transformer, short-circuit proof

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IEC 3C/952/FDIS

IEC 3C/953/FDIS