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给你一点资料参考一下.- ?# S; Z; W& b* K$ O9 }- I
Clause: 2.2.2 Voltage under Normal Conditions Test
' u" P9 x2 Q G# u$ CApplicable apparatus: Applicable with SELV circuit
# @; Z# B$ e. Z, L& K& E) GOperation:+ W6 j' e( y" K! |0 Z t
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., |; m) F, E9 m) c" v
2.Each single SELV circuit or interconnected SELV circuits are measured3 D4 b; i$ }; V( t
Criteria:The measured voltage shall not exceed 42.4 V peak or 60 V d.c.& R1 p$ S, |- Z& z+ W. l& }0 D
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Clause: 2.2.3 Voltage under fault Conditions Test
+ h( e; x1 t0 _1 L0 g& ^7 J B sApplicable apparatus: Applicable with SELV circuit
& t! _* O u' g7 J! G9 ~9 dOperation:3 z! l5 P3 V$ m1 j
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.5 |( n( y+ p2 _- f S8 j& y" m
2.Each single SELV circuit or interconnected SELV circuits are measured.
: y3 H& r- E" @1 j- n4 d' a3.A single failure of basic insulation or supplementary insulation or of a component failure is simulated one at a time.
5 u3 w8 C2 {! ~" b( n4.Voltages at the SELV circuits are measured by storage oscilloscope. ! \3 L! [& R4 ]& f
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.
" ]) n( q) P& [1 o2 ^Criteria:
* K$ ?* H% x: K& P, Y% X" K1.The measured max. voltage shall not exceed 71 V peak or 120 V d.c., and' ]# o2 U4 ~$ w* U& a! d# C5 m
2.The duration where exceed 42.4 V peak or 60 V d.c shall less than 0.2 s, and
% f9 B$ l% k! Y1 H" B7 V3.if t1<= 20 ms, t2 shall > 1 s, if t1 > 20 ms, t2 shall > 3 s |
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