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发表于 2012-9-28 09:22
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4.31 Insulation between circuits
" o1 {. o4 i2 R7 O( D+ vLuminaires incorporating transformers or controlgears providing insulation between circuits and
% {; s; H" [. s4 n# I' {luminaire using circuits insulated from a LV supply, shall provide suitable insulation between
5 s. p7 }* G! v% C# h3 \$ l- {circuits and between these circuits and the external accessible parts.
* F$ G9 ~4 z+ S% N4 J4 i4 C7 `The same requirements apply to the circuits connected to the control interface of a controllable9 L' q0 c3 L B
luminaire where it is required to maintain the same level of insulation for all components. On
9 M1 n' l1 w; Q4 u, B1 H3 @the evaluation of the type of circuit to be considered, the information given by the controlgear
; ~/ U9 {, {% ?2 ^. w, ?manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.8 D* O0 Q1 {' F# D* o* l
Note: at present on the market the following types of control systems are available:
+ [" R& y' }1 ]: P. d4 T! ?0 {- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and
L5 y- o X- C) r# `/ h1–10 V DC controls)
- ]- M& Y$ f: H- t; b% {. C- SELV Control signal, (e.g. DMX)$ R6 V6 F0 {1 W3 N3 J3 { j
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
% W& g( w, b4 }- H# Y: C3 UCompliance is checked by the following requirements.* B* [$ G" w" t# {, e7 A9 m5 t$ t
7 }% j. d6 n. T" n: y W
4.31.1 SELV circuits
5 f" P! u5 C; t) O! PThe following sources may be used to supply SELV circuits:& ], m3 U7 [3 i
- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of f) {* ~+ [ C* P7 _% L
61558( H7 a$ ^( W, t; c
- A controlgear providing SELV in accordance with IEC 61347 Series
# ]# h3 s$ k: f a4 y4 M/ J- An electrochemical source (e.g. a battery) or another source independent of a higher; t' N: n) v$ H- D; t
voltage circuit' p3 E" t) T! W; G
The voltage in the circuits shall not be higher than the limits defined for ELV.
$ j1 v+ ~1 y9 d7 b% E9 D( uSELV circuits shall be insulated from the LV supply by double or reinforced insulation (based
. h7 D( [% P. R' ^; q) }& D8 pupon a working voltage equal to LV supply voltage).
: `* ~5 }$ F1 C P+ PSELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or6 u( V5 u8 w. S; E- r8 `
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).( u: B7 I8 ?# q. l- h. |, d! @
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a
8 P7 \& @4 d6 Uworking voltage equal to LV supply voltage).
5 a$ _+ {; v! F/ T, s& T3 T0 b* g% ASELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a
e8 e8 _) C" B& y2 j# @; Bworking voltage equal to highest voltage in the circuits) s& h% I* Q, A# R6 e+ l$ M* w, i
SELV circuits shall be insulated from accessible conductive parts by an insulation according to
6 I8 l5 a( x0 m# G) Q( |table 1 in Annex X.
) k* |% j: a# ~3 l- GNote: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
6 J0 D7 c( c' G7 K8 \insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
. K3 F" E: U L; b# mCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this: o2 F r4 ~1 D ~! c3 H0 f
standard
# M$ R. c1 l5 H4 J. B6 [Plugs and socket-outlets in SELV systems shall comply with the following requirements:: }9 k: D( r' ?4 Y- f3 ?
- plugs shall not be able to enter socket-outlets of other voltage systems;" x( ^( |* V @& F1 b4 k
- socket-outlets shall not admit plugs of other voltage systems;& v* j4 i( O& S/ P" m. R" n
- plugs and socket-outlets in SELV systems shall not have a protective conductor
1 P5 p5 y! M1 V1 M0 C6 a) {contact.1 `6 Q& B. S2 H5 {
Compliance is checked by inspection
! _# D$ I% m+ ~9 l9 n. c' a
' d! E( D/ q' T: m' ~# q4.31.2 FELV circuits( c& n5 _7 I- k H$ q3 Y6 Q9 C# [' a+ D
The following sources may be used to supply FELV circuits:
' I1 H" w: I* c- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
3 {8 b1 u1 q2 h5 X61558: O* s8 J- M5 y. ]* g
- A separating controlgear providing basic insulation between input and output circuits in9 D+ b; ^7 z5 e) ~: `' X# |0 v4 ~5 D
accordance with IEC 61347 Series3 z* @+ ?9 ~% i! E$ y
- An electrochemical source (e.g. a battery) or another source in circuit separated by the
9 |) S2 k0 I1 c8 X1 p t, O+ [LV supply by basic insulation only.
+ ~9 [3 I# g* a. u7 I5 jThe voltage in the circuits shall not be higher than the limits defined for ELV.4 D$ B! L* N1 M* F1 c* \; y( O
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a" ?7 U8 m# p" Z4 R1 I& p; Q( K* l
working voltage equal to LV supply voltage).
: a0 E% ^; v' ? t' R5 mIt is not required that FELV circuits shall be insulated from protective earth circuit except for
) ~/ ?0 O* v& f( s5 s5 Yfunctional purpose.
; t% g/ {) A, r B0 m. f; d) {+ D, P2 ^FELV circuits shall be insulated from by an insulation according to table 1 in annex X. }4 H9 G/ a/ {+ @& i# Y
Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
% @+ D/ D, k4 u; O7 `2 q& }standard- O2 ^/ c( L* | |6 x; t
Plugs and socket-outlets for FELV systems shall comply with the following requirements:1 F; p* G6 b# r, r( \
- plugs shall not be able to enter socket-outlets of other voltage systems;
9 z z( j& n5 Z+ t$ M7 c1 `1 j- socket-outlets shall not admit plugs of other voltage systems;
/ K- ^$ {9 c; V$ W. A- socket-outlets shall have a protective conductor contact.
9 E: Z! y. ]+ O9 a0 TCompliance is checked by inspection
. e! y4 c0 t4 I; G, j* N1 D- W% M$ W8 }, \9 U
4.31.3 Other circuits:
) d1 p& B1 N1 b( Q8 zThe insulation between circuits other than SELV or FELV and accessible conductive parts shall: U1 z, b' Z. Y* P: H4 X8 M
be in accordance with the requirements in table 1 in annex X.
& y0 _6 z7 \- @& c+ E; N: ?In class II construction, where equipotential bonding is used for the protection against indirect
0 ~3 z9 R4 v6 q1 p3 Tcontacts with live parts (see table 1 in Annex X), the following requirements are applicable:
! K1 X) h7 M2 S2 C' T1 H: m/ B% b- All conductive parts are connected together so that two failures of the insulation result' `: d7 s& f/ d- `/ I
in a short circuit# c2 \$ ~8 s! o! ~% J6 o
- To check whether the conductive parts are reliably connected together, the test in/ A/ ~# \, G' h3 o
7.2.3 (earth continuity test with 10 A) have to be carried out9 G# f' t" i6 I" M
- the conductive parts comply with the requirements of annex A of this standard in case
' k9 l6 V: `+ d% S3 z6 E0 gof insulation fault between live parts and accessible conductive parts.. Z3 m# q/ s, K& V# m
- For master/ slave applications (the control gear is mounted in the master luminaire and3 [: _8 r! ^ ^! ? B4 p+ u
supplies the slave luminaires) an equipotential bonding between the luminaires shall be/ p& n; E& y; N0 p- ^) T
used to prevent dangerous voltages between accessible luminaires. For this reason! `5 [" J% C; i
master luminaire shall be provided with a terminal to connect accessible conductive
8 [0 ]" b8 H1 ~# o0 F6 t) n( c* uparts of the slave luminaires and the slave luminaire shall be constructed as class I& i4 d X0 I% K% I& A: _
luminaires.7 H$ J* _: O4 M& t5 p
Compliance is checked by applying the requirements of this standard to check to the insulation' `' o' P: [& G3 |
required in Annex X
8 l4 {0 `5 c; T/ a" Y5 N/ T7 e* v( l
Note: Example of this kind of circuits are:
" s9 O4 W8 j% X: b. H9 v$ V- output circuits of ballast according to 61347 series$ R/ Y7 t6 m# L' I, Z
- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent, s% C* G9 \) Z
- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the
* A- |8 }. d9 d. G" {5 n& k0 g* Qrequirements for FELV
3 C4 t/ c2 u! }- }) C- G- circuits supplied by separating controlgear (other than FELV) and isolating controlgear
1 e* R* c+ O' w+ _0 Z# _7 Q Saccording to IEC 61347-Series- F% _3 \- O3 P$ X% C9 F# d
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