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发表于 2012-9-28 09:22
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4.31 Insulation between circuits
, v" w$ w7 N" ] [0 b; n5 v0 o; W9 xLuminaires incorporating transformers or controlgears providing insulation between circuits and! F {" }! }5 K
luminaire using circuits insulated from a LV supply, shall provide suitable insulation between
' M' @9 e+ S" ?circuits and between these circuits and the external accessible parts.
9 Q8 t! ^7 w; l3 [ G# |The same requirements apply to the circuits connected to the control interface of a controllable4 W8 J( [8 j8 |$ W- C
luminaire where it is required to maintain the same level of insulation for all components. On
1 B4 g( m& |6 S1 f: ~+ u5 Fthe evaluation of the type of circuit to be considered, the information given by the controlgear
, F! t" N$ Z' G5 I8 m; A }" d' tmanufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.9 q5 H/ p: |8 b+ b) s
Note: at present on the market the following types of control systems are available:5 f( M8 n$ J$ J
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and
* ^6 r* W% m- q3 ^ V' H- ?2 Y& p1–10 V DC controls)
$ G4 M; ` f u, m# ]( u$ E- SELV Control signal, (e.g. DMX)6 d9 {0 P& h! E. h; l) `
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
# v5 s6 B7 C: J3 y% WCompliance is checked by the following requirements.8 b, r& u. W5 }. i% N
' g! Q" n* O5 n7 d5 h: K b4.31.1 SELV circuits
7 T) V) Y* F4 L1 H, ^: tThe following sources may be used to supply SELV circuits: d5 q: o v" g7 r4 t0 A6 w$ Z1 i
- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of" X0 Q$ t% f% E+ g2 N, s! |) a9 q
61558
& r) Q/ L. Z8 U4 Y: G4 w- A controlgear providing SELV in accordance with IEC 61347 Series" p$ D1 ~# P9 f5 J- A
- An electrochemical source (e.g. a battery) or another source independent of a higher: d% \& C7 v# g& i2 J
voltage circuit. S( n; r4 I8 q% S8 M! Q- J' N( A& _" N
The voltage in the circuits shall not be higher than the limits defined for ELV.6 Q9 D' ]2 O8 A' D
SELV circuits shall be insulated from the LV supply by double or reinforced insulation (based- j+ H+ `7 D/ y* T
upon a working voltage equal to LV supply voltage).
+ o$ U: p8 w+ J' N* [+ J4 G/ \SELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or, ~5 e2 m" z2 s! u' A
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).
% o, H3 n. f4 `) l# ?6 i6 YSELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a
8 I& Y7 [$ Q5 G. Nworking voltage equal to LV supply voltage).! J. G0 V9 @7 w4 C# Y% u6 j
SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a, `, L) }# |, `: _4 @ {
working voltage equal to highest voltage in the circuits)% f/ ^2 J4 _. F* u+ N# W( j
SELV circuits shall be insulated from accessible conductive parts by an insulation according to
; a# u% x0 Y: Q& btable 1 in Annex X.7 e3 a5 I! b! R2 l' W, ?
Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
$ u: H3 Q9 ]# [1 C; i: [% Sinsulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
; y+ R# q# F9 E6 P4 oCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this
: e' u( }6 D& ^. t4 `2 B" P/ U3 wstandard+ J" b" K$ `1 d6 D/ L
Plugs and socket-outlets in SELV systems shall comply with the following requirements:0 T8 p) Z" K+ E' }/ c
- plugs shall not be able to enter socket-outlets of other voltage systems;$ w5 L6 \6 O& e& t8 c
- socket-outlets shall not admit plugs of other voltage systems;
( }; Y8 K& A% r: J2 _. X- plugs and socket-outlets in SELV systems shall not have a protective conductor
& F. F2 p1 Y! h+ L. T! W2 {2 qcontact.- r5 D/ h- K: V7 `
Compliance is checked by inspection: h |( S# n, }( n: h
- k0 u2 E$ W& T& M) g
4.31.2 FELV circuits- I! Y- `! R T7 p7 T: L6 n; A" m
The following sources may be used to supply FELV circuits:
; U5 y9 ?! C* d1 I- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of1 s, }0 H+ [ O" _: M
61558- J/ C- o4 m% c: g4 [
- A separating controlgear providing basic insulation between input and output circuits in9 D) F: {: M0 J; Y1 I J" ?
accordance with IEC 61347 Series
5 c N) t, d" j6 |' K: u; L- An electrochemical source (e.g. a battery) or another source in circuit separated by the4 ^8 Q4 k( y& e+ c. @0 @. c
LV supply by basic insulation only.
% O- N1 \* ~& H( zThe voltage in the circuits shall not be higher than the limits defined for ELV.* Z3 n( g' V+ R& r
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a
& o. Q2 a4 N; b Yworking voltage equal to LV supply voltage).' n5 q# S& X$ e ]! @
It is not required that FELV circuits shall be insulated from protective earth circuit except for
( O2 D, _: _' ?5 w$ j0 I/ `functional purpose. c! K6 e2 B+ k! ^- ?
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.
2 t" r, a% I, y0 J9 mCompliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
; r. w; F/ ~5 w1 Q, W$ b# xstandard
b8 h+ g0 x$ z$ q" ]3 W: r9 t" Z# yPlugs and socket-outlets for FELV systems shall comply with the following requirements:8 I6 z! P* _% `# O+ u0 e9 \
- plugs shall not be able to enter socket-outlets of other voltage systems;
( c3 d6 H F! W5 H- socket-outlets shall not admit plugs of other voltage systems;$ V; g1 X9 U6 h% ]& y. u' e
- socket-outlets shall have a protective conductor contact.
9 L1 M1 M: K% Z6 ` iCompliance is checked by inspection5 W9 y, j' P9 C& A3 y3 [
: R. M: \1 Z1 u& Z
4.31.3 Other circuits:
4 _6 ]) A: R1 X! Z# J2 [The insulation between circuits other than SELV or FELV and accessible conductive parts shall' i- \ }+ v& _( d b
be in accordance with the requirements in table 1 in annex X.
" `9 u9 z1 e- i$ y" ]* p) u3 j- VIn class II construction, where equipotential bonding is used for the protection against indirect
5 O0 T5 O% N$ A) }! Vcontacts with live parts (see table 1 in Annex X), the following requirements are applicable:4 L7 k- j( x! e( e
- All conductive parts are connected together so that two failures of the insulation result) M! A$ z5 t! W6 @' [
in a short circuit
# V7 N" ^# O5 Q, B/ J& } k! Q; F- To check whether the conductive parts are reliably connected together, the test in: B" S8 s5 j/ z# P
7.2.3 (earth continuity test with 10 A) have to be carried out
! E' r+ J7 x2 x* }& w3 @- the conductive parts comply with the requirements of annex A of this standard in case
2 m/ s8 e/ |% M' p ~" w9 [2 Wof insulation fault between live parts and accessible conductive parts.& t% \) J1 N% O- Y, \
- For master/ slave applications (the control gear is mounted in the master luminaire and
" m9 S6 v+ O; m! S7 Q; I/ D6 Gsupplies the slave luminaires) an equipotential bonding between the luminaires shall be1 i7 _0 I. O# a" }) T0 X* F
used to prevent dangerous voltages between accessible luminaires. For this reason9 Q$ ~0 `. B1 w; o* B6 ~ c8 {
master luminaire shall be provided with a terminal to connect accessible conductive) V( Q/ S. _3 n8 {( C7 }. @' C4 L% U7 `
parts of the slave luminaires and the slave luminaire shall be constructed as class I3 o8 \ ^' p! N3 f& u$ b
luminaires.
4 {' |; h7 c2 C. H3 t3 w* S4 \( RCompliance is checked by applying the requirements of this standard to check to the insulation
. X. d4 ]( q& n, u" ^, m: D7 b4 @required in Annex X
. u: u1 W! n6 S, S" {) R! L1 d# `
Note: Example of this kind of circuits are:
. M" F% m( C: l' A- output circuits of ballast according to 61347 series
+ q" y# T. R9 _5 V' y- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent3 n* _( |6 y. ^
- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the X& q7 c/ N4 S
requirements for FELV
* ?& [$ V) B% Z) z; D2 Q2 o- circuits supplied by separating controlgear (other than FELV) and isolating controlgear: M. o7 h# z/ [+ R3 F7 w! E
according to IEC 61347-Series
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