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! R2 B9 t+ \* v0 Z1 v- ~. g | Transformer intened to supply power to a saftey extra low voltage circuit (SELV)
4 q/ T+ j' P. w | 24.1
) Z x8 u# C5 u, i+ o | 60730-1(ed.3);am1" k1 u1 d: F: z% I( X
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4 b1 i9 X% ?# IQuestion:, |! A: h* j2 `
Sub-clause 24.1 prescribes that “Transformers intended to supply power to a safety extra-low voltage
2 s& S6 f W9 @% ^, Bcircuit (SELV) shall be of the safety isolating type and shall comply with the relevant requirements of; d w( u! T1 [; P+ z" E( v+ Q6 S
IEC 61558-2-6.”.! j" N( {( g- R* y% h6 ^% m
This prescription does not allow the use of other types of transformers not covered by IEC 61558-2-6.
$ t* V0 i& q/ C8 f% t0 SIn case of testing of an electronic control with an integrated switch mode power supply (SMPS)) V) y" W; U6 U% ] N, l8 |
intended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be( Q; K) |$ G) H3 C" F3 o* p: I
applied?
- g% Q& t( @, b- L# wDecision:
, c* E3 z3 Q" bThe transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating& V2 U+ T' z, V' _0 p+ a+ v7 P; \
transformers.! y- C1 Y) a( _9 T
The entire switch mode power supply circuit (with the exception of the transformer) shall fulfil the
# I9 g% h( @* s/ drequirements of IEC 60730-1 and relevant Annex H.
$ g, R, N4 k# ^& U H) V
I' b! E# A: u$ I5 n4 T" T: \" u" J5 [
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发表于 2012-9-4 14:10
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