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| Creepage distances, clearances and distances through insulation
~$ q Q) m9 C4 U. w! w | 29.28 P! y3 \: }; C* U; a. H
| 60335-1(ed.3)
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Question:
# f" r* }' _/ r0 R8 D# _5 |What creepage and clearance distances apply across parts of same polarity when a cut out- ~; W1 }3 G8 r
operates during clause 19?
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See question.
) y. V8 M% g- j3 C% V9 w BDecision:# ^' n" D( R% e( w8 E
In this situation the live parts of thermal cut out in the open position are considered as parts
' Q2 c8 v5 V* F( p; wof different polarity.: [0 u- X6 B- l3 h3 Z, a3 D }' l
When measuring creepage and clearance, the distances should be checked according to the9 C/ X0 z2 n+ f# U* `6 K
component standard. If the cut out does not operate for all the tests of all clauses, the% J5 U, m' S6 \/ U L5 ]
distances are not measured because there is no open circuit and no parts of different polarity.
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发表于 2012-9-9 17:44
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