DSH 390 Abnormal test

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DSH 390 " G# o: ?- \% x" ^

Abnormal test 9 s4 t+ c8 e/ ]4 C' q5 x

5.4.6 7 @; F6 F2 U8 [) L( h; Q+ u

60950(ed.2);am1-am4 1 Y0 L" Q8 t* L$ P: F# }4 M/ H/ l

Standard:
, ~# ]) G1 S5 b/ E8 d$ `8 e+ QIEC 60950 (1991) 2nd ed., Amdts.1
$ X. s9 z9 O! _$ s' Q! ^(1992), 2 (1993), 3 (1995), 4 (1996)
Sub clause:
5.4.6
, |/ x# h: [8 [; c3 |) tSheet n. 390
5 `1 b* Z/ p: ^  O0 W7 L: SPage 1(1)
' o3 h- n$ H1 m, a" ESubject:
9 M  v$ D9 p1 Q: ]Abnormal test
7 d5 G" S9 I4 }: |& s% I; J6 kKey words:
- Abnormal test
6 x0 f# h( T# A+ \3 E. B" q6 a  t- Fault
1 f% h& f4 n! j5 BDecision confirmed
) K1 N: x* ^, h4 m0 T) wat CTL 38th meeting
" ]' p# B. B$ n) ^Question:
% l8 k! n% h) yIf a printed wiring board mains trace opens during the performance of the component abnormal
( ?0 C0 l1 x& Stest, should the test be terminated, should the trace be shorted and the test be continued until the
ultimate results are obtained, or should the test be repeated a total of three times?
% e- B! o6 B5 K. \Decision:
For primary circuits, the trace should be shorted and the test continued until the ultimate results
7 U; `; `- E- V) \are obtained, additional short circuiting applied as required. For secondary circuits, where the
) e7 J/ m$ T+ ^) {, q4 H% \1 M% Rtrace is designed to be opened in a repeatable manner, a second option is for the test to be
repeated three times to determine the circuit opens repeatedly.
$ C5 x: Q/ `# o

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