SAFETY OF SMALL POWER TRANSFORMERS, POWER SUPPLY UNITS AND SIMILAR - PART 2-8: PARTICULAR REQUIREMENTS FOR BELL AND CHIME TRANSFORMERS (IEC 61558-2-8:1998, IDT)
This Malaysian Standard deals with all aspects of safety such as electrical, thermal and mechanical.
This standard applies to fixed, single-phase, air-cooled (natural or forced), indépendant or associated safety isolating transformers for bell and chimes, having a rated supply voltage not exceeding 250 V a.c., a rated frequency not exceeding 500 Hz, a rated output not exceeding 100 VA. The no-load output voltage shall not exceed 33 V a.c. or 46 V ripple free d.c. and the rated
output voltage shall not exceed 24 V a.c. or 33 V ripple free d.c.
Bell and chime transformers are generally intended to supply domestic sound signalling equipment and other similar devices where the load is applied for short periods of time.
NOTE 1 – A partial load may be applied for illumination purposes.
This standard applies to special safety isolating transformers (transformer for bell and chime) which are used where double or reinforced insulation between circuits is required by the installation rul
Published
• (none) / (none) / (none)
PDF
23/05/2019
23
NSC 05 - Generation, Transmission & Distribution of Energy
