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发表于 2012-9-28 09:22
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4.31 Insulation between circuits
& L/ P( z" o+ }6 ~Luminaires incorporating transformers or controlgears providing insulation between circuits and
9 n. e2 P- j3 ^% E2 nluminaire using circuits insulated from a LV supply, shall provide suitable insulation between; q* F4 u: \. Q4 U
circuits and between these circuits and the external accessible parts.; `9 {- o1 q! F2 y% n# w# |
The same requirements apply to the circuits connected to the control interface of a controllable: O$ P4 d" `* k) O' t1 Z
luminaire where it is required to maintain the same level of insulation for all components. On3 \6 e/ m, w2 C: Z( }+ T0 M
the evaluation of the type of circuit to be considered, the information given by the controlgear% A! d- S' ^: x# `
manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.
. b8 L$ b4 w z% vNote: at present on the market the following types of control systems are available:
& s& N! v: l' q1 u* ^- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and* l C! Z* _4 L
1–10 V DC controls)
0 D* o8 f% ?3 n6 e- SELV Control signal, (e.g. DMX)
% L" X) b# f8 r7 t" u1 I) `- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
, s9 J0 T# [6 p" U1 Y0 OCompliance is checked by the following requirements.
" E+ Z- p9 V; I8 j' m
# ?) F) H' h) j0 t! @4.31.1 SELV circuits, X& ?/ l: _- G2 d% B' D
The following sources may be used to supply SELV circuits:
% M# i0 T7 {7 c4 l6 l( p( q- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of7 s+ u" F; \+ |
61558- E% X! Q: z5 o4 R; e) ^9 z
- A controlgear providing SELV in accordance with IEC 61347 Series
& I9 w- E9 N1 q7 ]& z# k- An electrochemical source (e.g. a battery) or another source independent of a higher
3 Y' @ S; s& L! q' C3 ]1 [ O( pvoltage circuit
5 X! f2 }2 m) A6 ]The voltage in the circuits shall not be higher than the limits defined for ELV.! X3 C O8 T7 K/ @
SELV circuits shall be insulated from the LV supply by double or reinforced insulation (based! ?; j" m. E, d! U
upon a working voltage equal to LV supply voltage).+ I5 |4 F9 A2 Y" _
SELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or
, C6 i4 ^) [, X$ o5 treinforced insulation (based upon a working voltage equal to highest voltage in the circuits).6 W8 I- d# U3 ~3 ~( ~4 ^8 {: \* b2 C
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a; P8 K, \; w; j8 A, o
working voltage equal to LV supply voltage).
3 Q$ G0 o6 l# u- `2 R4 CSELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a
9 ~/ x2 n; u4 I2 v* D4 l" a% B+ `# C( w: i# Fworking voltage equal to highest voltage in the circuits)$ x4 ?4 |5 v+ b! D M8 m
SELV circuits shall be insulated from accessible conductive parts by an insulation according to
* `. K5 w' n. x& ^; Z |3 Ttable 1 in Annex X.
: s9 a4 {! H3 J/ l( X, c7 G# dNote: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
- y/ W! f# i. O1 G" R2 Oinsulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.3 j- ^( h0 m; A o* N
Compliance is checked by inspection and by the test required in clause 8, 10 and 11 of this) J( z% X: e" i( e8 _% e
standard
+ y6 ^. F3 W2 V+ a# r$ BPlugs and socket-outlets in SELV systems shall comply with the following requirements:
$ v% P1 Q$ S# E5 `& Z4 L- plugs shall not be able to enter socket-outlets of other voltage systems;
6 m& j0 ~" `4 d- socket-outlets shall not admit plugs of other voltage systems;# x; W4 c- \' D* D& `1 Y
- plugs and socket-outlets in SELV systems shall not have a protective conductor9 N( Q! N) C% O
contact.
8 p6 L$ ^: u7 n, h" t* W! vCompliance is checked by inspection' |; ?/ u1 j6 X2 ]' w# P: Z" T0 \
5 r( h3 x7 u, U5 U8 _7 {2 b/ u0 p
4.31.2 FELV circuits- U" K! B! N+ E7 ^$ j: i
The following sources may be used to supply FELV circuits:" _% }) [% _' z' B+ v. [
- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of, v$ N r; a( D+ e
61558
9 W4 [$ S* _7 W" ^: G- `- L- A separating controlgear providing basic insulation between input and output circuits in! H# t; M9 c' a
accordance with IEC 61347 Series- q/ V& o; P y1 `6 [
- An electrochemical source (e.g. a battery) or another source in circuit separated by the
# v6 r/ A% Q( L9 r* M5 U4 \LV supply by basic insulation only.
+ ]9 T+ |1 ]9 U7 kThe voltage in the circuits shall not be higher than the limits defined for ELV.6 q t- p' @: j3 G2 Q7 K
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a! D3 z* b$ z* p: H
working voltage equal to LV supply voltage).& [/ G f, B- W2 Z5 p X
It is not required that FELV circuits shall be insulated from protective earth circuit except for
( |8 ?7 d, f& G' o' \: D- ?functional purpose.. U2 C5 J; A' B. b# K' t
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.3 T$ _# r; Q, o& S4 t! S
Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this. ~ |! H) P- N& D E* [
standard
( K! u" ~$ v3 K/ S. I) zPlugs and socket-outlets for FELV systems shall comply with the following requirements:/ N8 K8 S$ g* M6 b, p
- plugs shall not be able to enter socket-outlets of other voltage systems;
2 P, M$ Q$ u8 C1 L; O8 P0 l- socket-outlets shall not admit plugs of other voltage systems; F; u' ?9 H2 |& s' T4 _, q; [
- socket-outlets shall have a protective conductor contact.1 z) I' h6 U! l5 W2 ]
Compliance is checked by inspection
1 ~6 c8 o* w4 H2 w8 a3 I4 v. {6 y: g2 r
4.31.3 Other circuits:
/ W6 p" f k" F* ]4 K# eThe insulation between circuits other than SELV or FELV and accessible conductive parts shall
a/ d* P' p; c% W' O! ]9 x1 vbe in accordance with the requirements in table 1 in annex X.& w$ v( t! k$ T0 ^8 q% u) S
In class II construction, where equipotential bonding is used for the protection against indirect8 C* L0 Q5 s" [7 l
contacts with live parts (see table 1 in Annex X), the following requirements are applicable:% S1 {2 i" u. Y* [
- All conductive parts are connected together so that two failures of the insulation result
5 O2 F8 Z, M D! E) V. i3 H& ain a short circuit
3 a+ G8 F+ h7 X2 m- To check whether the conductive parts are reliably connected together, the test in( ~) e2 u( x& W$ P% c9 i }
7.2.3 (earth continuity test with 10 A) have to be carried out
# g) g& C/ e4 w9 v- the conductive parts comply with the requirements of annex A of this standard in case9 P9 [* a- j J
of insulation fault between live parts and accessible conductive parts.
, Q2 z( ~4 V/ I' A; E# [8 }- For master/ slave applications (the control gear is mounted in the master luminaire and
U& ]4 ~8 @4 i2 `; psupplies the slave luminaires) an equipotential bonding between the luminaires shall be
+ y q, X9 Q' x9 q. v+ u( Y) zused to prevent dangerous voltages between accessible luminaires. For this reason
! o4 m; p P/ F) `0 Emaster luminaire shall be provided with a terminal to connect accessible conductive0 l: Y0 h: z y% S! q
parts of the slave luminaires and the slave luminaire shall be constructed as class I" ^3 m" }, _+ L$ M$ f2 R
luminaires.
s# e; v7 J# x6 p/ z; Y. p( UCompliance is checked by applying the requirements of this standard to check to the insulation
1 C+ ]9 E" a) ?1 E- k6 drequired in Annex X( S7 _9 R. x8 j" E! e0 }" G0 h) g
0 Y: N- _: w, E) g' G8 v
Note: Example of this kind of circuits are:; T1 }2 U! j8 a- o. @
- output circuits of ballast according to 61347 series
8 ]" v7 `% ~, w3 w3 f* X q* G- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent$ ~' d' ], t" O2 P2 ?5 c. b
- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the0 h* ?) B/ e+ T1 g
requirements for FELV6 W8 C# S3 U# E; E& `1 N" _. R3 W
- circuits supplied by separating controlgear (other than FELV) and isolating controlgear1 D, ]& y, V( s- [# U+ ]# w
according to IEC 61347-Series/ \1 M) D6 B# w2 H5 C) R
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