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以下是这个问题的专业解释.1 e( q/ L3 ]8 y% \
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5.3.8-1 Bursting fuses% r4 R! c; p9 n0 j
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DESCRIPTION OF ISSUE:
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- [- o' a1 q A# Y9 _0 C1 g4 ] `Type of Issue: Technical
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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?7 G, |$ v5 I# m* {) ^! k" V
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APPLICATION GUIDELINE:0 N* y. i& a0 C# C( T3 ]5 x, T
, @' l6 S5 k$ j: VA 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
" B: A) }( W3 @9 |3 }) d) _248-14.
$ l# Q$ {0 \. F/ k2 b- Y6 ePlacement 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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