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给你一点资料参考一下.
* c/ {) |: O5 t, f7 _& LClause: 2.2.2 Voltage under Normal Conditions Test$ @) [! Y7 ?8 ^% J. z0 p) i
Applicable apparatus: Applicable with SELV circuit, R A0 u/ U( f/ N+ p/ `
Operation:
, j, |2 `9 u) K7 O+ [& z# h6 L0 @1. EUT: (1) AC mains: U=1.06 / 1.1 Un, F=Fn; (2) DC mains: U=1.2 Un (if the tolerance is declared by client, to conduct by the client’s maximum declared value). Both under any load conditions which can generate maximum output voltage.! a/ k% F. J7 N/ T# v) z# _
2.Each single SELV circuit or interconnected SELV circuits are measured6 Z0 d5 k* p0 y+ s# e" x2 G
Criteria:The measured voltage shall not exceed 42.4 V peak or 60 V d.c.
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; {* @/ t, ~) _* WClause: 2.2.3 Voltage under fault Conditions Test
2 Z% K% J2 v2 j, o9 U/ zApplicable apparatus: Applicable with SELV circuit, H: f. M$ S% o% ~5 y
Operation:/ \+ j$ w2 Q% t7 E% ~* c
1.EUT: (1) AC mains: U=1.06 / 1.1 Un, F=Fn; (2) DC mains: U=1.2 Un (if the tolerance is declared by client, to conduct by the client’s maximum declared value). Both under any load conditions which can generate maximum output voltage./ e+ F7 f; x: J0 g C2 h- F r5 T
2.Each single SELV circuit or interconnected SELV circuits are measured.
0 B, P' v; Y9 o' w2 j3.A single failure of basic insulation or supplementary insulation or of a component failure is simulated one at a time.' L8 c, d) Z: b( P# @
4.Voltages at the SELV circuits are measured by storage oscilloscope.
+ X0 q, X5 n/ o: P% v4 D2 }# E% `& ]5.For voltage having repetitive nature after a fault, the highest voltage, duration exceed (t1) and not exceed (t2) 42.4 V peak or 60 V d.c. shall be recorded. ! Z" g% ^" l6 J# b! p* i) n1 n
Criteria:! e) ^2 G; R4 z0 s+ c# x8 a
1.The measured max. voltage shall not exceed 71 V peak or 120 V d.c., and, D( z" n) S0 Q
2.The duration where exceed 42.4 V peak or 60 V d.c shall less than 0.2 s, and
0 ]; s1 I/ q T" [1 Q. X3.if t1<= 20 ms, t2 shall > 1 s, if t1 > 20 ms, t2 shall > 3 s |
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