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以下是这个问题的专业解释.
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5.3.8-1 Bursting fuses
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8 e. w; D3 T5 K/ wDESCRIPTION OF ISSUE:
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! q4 |# P9 W. d- p, E9 G& uType of Issue: Technical
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5 ]$ @+ p6 s; z" K9 ?During fault testing in the Primary circuits of switch mode power supplies (SMPS) and other ITE, sometimes a fuse that provides supplementary (non-branch circuit) overcurrent protection and that complies with either IEC 60127 or UL 248-14 will burst while clearing the circuit Is this an acceptable result and termination of the test?
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APPLICATION GUIDELINE:
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. @* l. J* X! T% x% k* O2 [2 eA fuse that bursts is not an acceptable result and termination of a test. If a fuse bursts during fault testing per sub-clause 5.3, it does not have adequate breaking (rupturing) capacity. Therefore, such a fuse should be replaced by the manufacturer with another fuse having high breaking capacity. This consideration applies to fuses complying with both IEC 60127 and UL
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4 x0 c3 [, Z- p3 S5 \/ yPlacement of heat shrink or similar tubing over the fuse assembly is not a suitable solution to wholly mitigate potential hazards associated with a bursting fuse. |
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