![]() ![]() According to IEC 257, the rated current is determined by the rated accepted power of a fuse-holder. Considerable differences exist between the IEC and the UL standards regarding the rated current of a fuse-holder. In the following, some of the most important differences between the two standards will be indicated.įrom an application point of view, a fuse-holder is characterized by the features discussed in the previous section by its rated values for voltage, current, and accepted power. In the case of fuse links, compliance with the UL-standard does not usually mean that the fuse-holder under consideration meets IEC-requirements and vice versa. 2 to this publication dated January 1989.īoth standards show considerable differences. IEC-publication 257 (1968) and Amendment no.The most important standards for fuse-holders, which specify requirements, characteristics and testing methods are: How much is available to spend on safety and reliability?.Should the fuse only be accessible from outside the appliance?.Should the end customer of the appliance have access to change the fuse?.How often will the fuse need to be replaced?.Will the fuse need to accessible for replacement?.The first step is to answer the following questions: Selection of the Fuse and Holder Solution ![]()
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