標準號：IS 1416-1972
發(fā)布日期：1972/6/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard applies to stationary and portable, single-phase air-cooled safety transformers with extra-low output voltage, with a rated supply voltage not exceeding 250 V, a rated output not exceeding 5 kVA and a rated frequency of 50 Hz.1.1.1 This standard applies to transformers, such as transformers for feed-ing extra-low voltage distribution circuits, transformers for heating blankets and for heating-pads, transformers for portable tools, transformers for toys, bell transformers, handlamp transformers, defrosting transformers and transformers for medical equipment.1.1.2 This standard applies to transformers incorporated in appliances or other equipment, provided the conditions occurring in the appliance or equipment are taken into account. Examples of such transformers are: transformers in appliances for skin or hair treatment, transformers in solder-ing guns, transformers in medical or dental equipment and rectifier transformers.1.2 It does not apply to oil-filled, sand-filled and similar transformers. In locations where special conditions prevail, as in ships, vehicles air field and the like, and in hazardous locations, for example, where explosions are liable to occur, special constructions may be required.1.3 This standard does not apply to transformers used in radio communi-cation equipment and similar purposes.