Reaffirmed 2018

1. SCOPE

1.1 This standard applies to ltationary and portable, single-phase air-cooled safety transformera with extra-low output voltage, with a rated supply voltage not exceeding 250 V, a rated output not exceeding 5 kVA arid. a rated frequency of 50 Hz. .

1.1.1 This .tandard applies to transformen, such as tranlformeR for feed. ing extra-low voltage distribution circuits, transformers for heating blankets and for heating pads. traDlformen for portable tools, transformers for toys, bell transformers, hand laQlP transformen. defrosting transformers and transformers for medical equipment.

1.1.2 Thil 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 traaaformers are: transformers in appliances for akin or hair treatment, transformers in soldering guns, transformers in medical or dental equipment and rectifier transformers.

1.2 It docs 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 communication equipment and similar purposes.