This standard specifies the special requirements for the protection of tubular fuse-links for small fuses with dimensions of φ5mm×20mm and φ6.3mm×32mm that are commonly used in indoor electrical installations, electronic equipment and components therein. This standard does not apply to fuse-links for electrical installations used in special conditions such as corrosive and flammable environments. This standard also adopts the requirements of GB 9364.1-1997.