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以下是这个问题的专业解释.
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0 ^7 E0 i# E- W, h @8 W5.3.8-1 Bursting fuses- G+ I' H7 g2 M0 H! T
' Y' B- s7 K+ m1 m4 {DESCRIPTION OF ISSUE:
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9 c/ V) U' _4 s6 l+ `6 o: \Type of Issue: Technical: A) q- J! G7 p/ v2 m* `! Y; @
& F' g0 V9 @0 A8 t1 S/ _6 @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?9 N6 s. ?" `. c6 g
6 B& Y! E& f4 @: \4 XAPPLICATION GUIDELINE:' F& ?% U2 e+ b# t: m o
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A 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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( r$ \& i" H' l; G& p9 k& F( zPlacement 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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