DSH 390 Abnormal test

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DSH 390 8 e' J- x& ?( k2 a( y ; t0 @: x+ @& H( v0 T( x2 l

Abnormal test

5.4.6

60950(ed.2);am1-am4 4 Y1 D/ y' F( D3 o! ~5 y+ F9 O

Standard:
8 F7 v. M% O$ R  b3 x0 d* Z1 YIEC 60950 (1991) 2nd ed., Amdts.1
& [& l0 G6 ~' }: J' D* k(1992), 2 (1993), 3 (1995), 4 (1996)
Sub clause:
5.4.6
7 G/ X5 x9 J8 [5 y: Y+ qSheet n. 390
Page 1(1)
! v) V1 a, N. J+ o4 m0 vSubject:
Abnormal test
1 A  P' b0 i+ y1 NKey words:
4 h* p. T. t0 s# P$ {+ K9 K; k# A6 x/ g+ L- Abnormal test
- Fault
5 E7 g9 F- ]* y! ^+ F# MDecision confirmed
at CTL 38th meeting
Question:
6 n3 B. U: Z. K; wIf a printed wiring board mains trace opens during the performance of the component abnormal
+ }" G5 \6 J' A# \2 b# D" u/ itest, should the test be terminated, should the trace be shorted and the test be continued until the
$ A  A* R1 V0 ~. _2 l+ a/ Gultimate results are obtained, or should the test be repeated a total of three times?
. }# [1 D. Q! W/ ]; ]8 {Decision:
For primary circuits, the trace should be shorted and the test continued until the ultimate results
are obtained, additional short circuiting applied as required. For secondary circuits, where the
trace 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.