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ELECTRIC MEASURING DEVICES DIRECT ACTION RECORDERS AND ACCESORIES. Original standard UNE 21319-1974 in PDF full version. Additional info + preview on request

Document status: Active

Determination of the aromatic hydrocarbon content of new mineral insulating oils. Original standard UNE 21320-34-1983 in PDF full version. Additional info + preview on request

Document status: Replaced by STB UNE-HD 382 S1-2025

TEST ENCLOSURES OF NON-INJECTION TYPE FORM CONSTANT RELATIVE HUMIDITY. Original standard UNE 21324-1975 in PDF full version. Additional info + preview on request

Document status: Withdrawn

SPECIFICATION FOR SOLVENTLESS POLYMERISABLE RESINOUS COMPOUNDS USED FOR ELECTRICAL INSULATION - METHODS OF TEST - TEST METHODS FOR COATING POWERS FOR ELECTRICAL PURPOSES. Original standard UNE 21340-2-2-1992 in PDF full version. Additional info + preview on request

Document status: Active

Methods of test for the determination of ionic impurities in electrical insulating materials by extraction with liquids. Original standard UNE 21370-1985 in PDF full version. Additional info + preview on request

Document status: Active

INSULATING MATERIAL - VULCANIZED FIBRE FOR ELECTRICAL PURPOSES - DEFINITIONS AND GENERAL REQUIREMENTS. Original standard UNE 21373-1-1984 in PDF full version. Additional info + preview on request

Document status: Replaced by STB UNE-EN IEC 60667-1-2020