DIN EN 60127-2:2015-07

This part of IEC 60127 relates to special requirements applicable to cartridge fuse-links for miniature fuses with dimensions measuring 5 mm×20 mm and 6,3 mm×32 mm for the protection of electric appliances, electronic equipment and component parts thereof, normally intended for use indoors. It does not apply to cartridge fuse-links for appliances intended to be used under special conditions, such as in corrosive or explosive atmospheres. This edition includes the following significant technical changes with respect to the previous edition: - All clauses have been revised taking into consideration the full text of the previous edition in accordance with the current requirements for structure and layout. - The 4 new standard sheets 7 up to 10 were added. This standard applies in addition to the requirements of IEC 60127-1, especially referring to the terms, general requirements and standardised rated values used therein. In addition to the requirements mentioned in IEC 60127-1, each cartridge fuse-link shall be marked with a symbol denoting the rated breaking capacity. This symbol shall be placed between the marking for the rated current and the marking for the rated voltage. These symbols are H denoting high breaking capacity, L denoting low breaking capacity, and E denoting enhanced braking capacity. An important object of this standard is to define special and additional test methods for cartridge fuse-links. For testing individual fuse ratings, the number of fuse-links required is 48, of which 12 are kept as spares. For the maximum ampere rating of a homogeneous series, the number of fuse-links required is 48, of which 22 are kept as spares. For the minimum ampere rating of a homogeneous series, the number of fuse-links required is 33, of which 16 are kept as spares. Electrical requirements are defined, for example for the breaking capacity and for testing with alternating current. In addition to the criteria of failure already described in IEC 60127-1, in each of the tests the fuse-link shall operate satisfactorily without any of the following phenomena: fusing together of the contacts, illegibility of marking after test, piercing of the external surfaces of the end caps, visible to the naked eye. The following phenomena are neglected: black spots on the end caps, small deformation of the end caps, and cracking of the fuse-link. The following standard sheets are included: - Standard Sheet 1: Fuse-links 5 mm×20 mm Quick-acting High-breaking capacity - Standard Sheet 2: Fuse-links 5 mm×20 mm Quick-acting Low-breaking capacity - Standard Sheet 3: Fuse-links 5 mm×20 mm Time-lag (surge-proof) Low-breaking capacity - Standard Sheet 4: Fuse-links 6,3 mm×32 mm Quick-acting Low-breaking capacity - Standard Sheet 5: Fuse-links 5 mm×20 mm Time-lag (surge proof) High-breaking capacity - Standard Sheet 6: Fuse-links 5 mm×20 mm Time-lag (surge-proof) Enhanced breaking capacity - Standard Sheet 7: Fuse-links 6,3 mm×32 mm Quick-acting Enhanced breaking capacity - Standard Sheet 8: Fuse-links 6,3 mm×32 mm Time-lag Enhanced breaking capacity - Standard Sheet 9: Fuse-links 6,3 mm×32 mm Quick-acting High-breaking capacity - Standard Sheet 10: Fuse-links 6,3 mm×32 mm Time-lag High-breaking capacity. Annex A deals with miniature fuse-links with wire terminations. The automatic assembly of electrical and electronic circuits on printed boards has led to a requirement for miniature cartridge fuse-links which have the performance level of existing 5 mm×20 mm types and are of a form suitable for automatic insertion into printed boards. This annex supplements the requirements of this standard and is to be applied to already tested and approved 5 mm×20 mm fuse-links which are available without wire terminations. This annex relates to special requirements applicable to miniature fuse-links adapted to printed circuits and used for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors. The responsible committee is DKE/K 663 "Gerätesicherungen (G-Sicherungen)" ("Equipment fuses") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.