Normativa ISO UNE gratis

Fecha de publicación: 15/07/1990 Safety of transportable motor-operated electric tools – Part 1: General requirements IEC 61029-1:1990

Fecha de publicación: 18/07/1990 Rectangular connectors for frequencies below 3 MHz – Part 3: Detail specification for a range of connectors with trapezoidal shaped metal shells and round contacts – Removable crimp contact types with closed crimp barrels, rear insertion/rear extraction IEC 60807-3:1990

Fecha de publicación: 01/12/1990 Connectors for frequencies below 3 MHz for use with printed boards. Part 8: Two-part connectors for printed boards, for basic grid of 2.54 mm (0.1 in), with square male contacts of 0.63 mm x 0.63 mm IEC 60603-8:1990

Fecha de publicación: 31/12/1990 Dimensions and output series for rotating electrical machines – Part 2: Frame numbers 355 to 1000 and flange numbers 1180 to 2360 IEC 60072-2:1990

Fecha de publicación: 31/12/1990 Rules for steam turbine thermal acceptance tests. Part 1: Method A – High accuracy for large condensing steam turbines IEC 60953-1:1990

Fecha de publicación: 11/02/1991 Varistors for use in electronic equipment – Part 2: Blank detail specification for zinc oxide surge suppression varistors. Assessment level E IEC 61051-2-2:1991

Fecha de publicación: 15/02/1991 Rotating electrical machines – Part 16: Excitation systems for synchronous machines – Chapter 2: Models for power system studies IEC TR 60034-16-2:1991

Fecha de publicación: 15/02/1991 Guide for field measurement of vibrations and pulsations in hydraulic machines (turbines, storage pumps and pump-turbines) IEC 60994:1991

Fecha de publicación: 16/05/1991 Test methods for the determination of bond strength of impregnating agents to an enamelled wire substrate IEC 61033:1991

Fecha de publicación: 28/05/1991 Amendment 1 – Sound system equipment. Part 2: Explanation of general terms and calculation methods IEC 60268-2:1987/AMD1:1991