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给你一点资料参考一下.
% K4 D" Y( Q) `0 l8 v$ V3 B$ DClause: 2.2.2 Voltage under Normal Conditions Test
1 M- g4 a* s: w, LApplicable apparatus: Applicable with SELV circuit* C4 D8 g8 ?9 L: r. ^
Operation:+ V6 R0 N/ x8 W( `" n* a* f
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.( `$ O3 v" i/ `+ M' q) l% s
2.Each single SELV circuit or interconnected SELV circuits are measured
' Y8 X4 D D; z9 Y0 l/ VCriteria:The measured voltage shall not exceed 42.4 V peak or 60 V d.c.* O/ r5 I8 {9 B/ H( ]6 R0 ], t
1 v2 Y9 |7 c5 e. K. L7 c
( X, ]# d" \( H9 z# lClause: 2.2.3 Voltage under fault Conditions Test- C2 @6 B5 k/ l5 V7 y6 E+ ]
Applicable apparatus: Applicable with SELV circuit
1 \; e3 |, `5 t+ o. L2 U2 _Operation:5 G0 w5 u' o7 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.
s# E) J) y' i" J. ^1 m& {" U2.Each single SELV circuit or interconnected SELV circuits are measured.- U- j& e: z) X
3.A single failure of basic insulation or supplementary insulation or of a component failure is simulated one at a time.
[% m) N1 \% _( k W4.Voltages at the SELV circuits are measured by storage oscilloscope.
& B0 H7 j! R# F( z! z+ u& [% Z# w5.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. % ], H. d/ W" j
Criteria:6 \! O. x+ o* v; M* m) D- s5 {
1.The measured max. voltage shall not exceed 71 V peak or 120 V d.c., and
* S9 C- Q! F0 V' j# X2.The duration where exceed 42.4 V peak or 60 V d.c shall less than 0.2 s, and
; t# G: P' u5 g, s+ n. @3.if t1<= 20 ms, t2 shall > 1 s, if t1 > 20 ms, t2 shall > 3 s |
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