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以下是这个问题的专业解释.
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% U0 w+ v) q7 a7 l; w5.3.8-1 Bursting fuses! g/ Z: [# |- D2 T$ y% {" T# {
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DESCRIPTION OF ISSUE:
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8 Y1 [- y( n* e" PType of Issue: Technical
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( Z7 W2 P: {5 R y: Z/ ADuring 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:4 M' ?6 {. v0 @
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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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Placement 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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