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给你一点资料参考一下.2 I% x( g6 H, d/ F3 h# q/ b
Clause: 2.2.2 Voltage under Normal Conditions Test. C- b A/ j( c$ m
Applicable apparatus: Applicable with SELV circuit+ k) f: {' ~% h
Operation:! x! {! t$ J7 ]) J6 v
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.
8 _" W1 F- c4 i7 d9 z2.Each single SELV circuit or interconnected SELV circuits are measured
4 _6 i( g, h& K4 P0 m6 |Criteria:The measured voltage shall not exceed 42.4 V peak or 60 V d.c.0 p1 K0 B* F* f$ @. X
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6 \7 m O3 k1 L m/ A" [Clause: 2.2.3 Voltage under fault Conditions Test" N( K7 r8 ^6 M) [- f7 M
Applicable apparatus: Applicable with SELV circuit
4 b! M# g* L( g$ G9 h/ FOperation:
I5 d: c: P3 R1.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" b {$ O. P( g/ P2.Each single SELV circuit or interconnected SELV circuits are measured.
* C, ~3 T0 |+ p4 o3.A single failure of basic insulation or supplementary insulation or of a component failure is simulated one at a time.
# G' |0 |5 d+ ^ p4.Voltages at the SELV circuits are measured by storage oscilloscope. " F2 S. I, l3 V7 ]+ k
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.
1 _0 k7 W) b2 a8 n5 I' N% bCriteria:
: ~% Y- x4 Z- V! v; {: {5 H/ T1.The measured max. voltage shall not exceed 71 V peak or 120 V d.c., and
6 S2 s7 K7 `2 j8 E2.The duration where exceed 42.4 V peak or 60 V d.c shall less than 0.2 s, and - z' p2 t& [5 K0 k
3.if t1<= 20 ms, t2 shall > 1 s, if t1 > 20 ms, t2 shall > 3 s |
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