I.T.E-Standard-UL60950的讲义.pptVIP

I.T.E SATNDARD Safety of information technology equipment including electrical business equipment -IEC 60950 -UL 1950 -EN 60950 -CSA C22.2 No.950 Application of this standard is intended to prevent injury or damage due to the following hazards: - Electric shock - Energy hazards - Fire - Mechanical and heat hazards - Radiation hazards - Chemical Safety of requirement Marking Test Construction Marking 1.7 Marking and Instructions 1.7.1 Power rating - The voltage range shall have a hyphen (-) between the minimum and maximum RATED VOLTAGES. When multiple RATED VOLTAGES or RATED VOLTAGE RANGES are given. They shall be separated by a solidus (/). - manufacturer’s name, trade mark or Identification mark. - manufacturer’s model or type reference. - symbol for class II construction, for CLASS II Equipment only. 1.7.6 Fuses Marking shall be located on, or adjacent to, each fuseholder giving the fuse rated current and, where fuses of different rated voltage value could be fitted, the fuse rated voltage. 1.7.7.1 Protective earthing terminals - The wiring terminal intended for connection of the protective earthing conductor associated with the supply wiring shall be indicated by the symbol - It’s not a requirement to mark other terminals for protective earthing conductors, but where such terminals are marked, the symbol . 1.7.8 Controls and indicators 1.7.8.3 Symbols - It’s permitted to use the symbols 0 and I as OFF and ON marking on any primary power switches, including isolating switches. - A “STAND-BY” condition shall be indicated by the symbol Test Rating Temperature Dielectric Strength Leakage Current Capacitor Discharge Grounding Continuity Short-Circuit and Overload Abnormal Other (Environment) Power interface (Rating) 1.6.1 Input Current The steady state input current of the equipment shall not exceed the RATED CURRENT by more than 10% under NORMAL LOAD. 1.6.5 Mains supply t