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4.31 Insulation between circuits4 y) A/ G! o Y. x& _0 b
Luminaires incorporating transformers or controlgears providing insulation between circuits and
, o" [/ L- `9 s* n% @1 @8 Zluminaire using circuits insulated from a LV supply, shall provide suitable insulation between9 t; X! w) F' w( G$ i
circuits and between these circuits and the external accessible parts.
! J! k4 ]$ A/ l; g9 G H q; [1 r- kThe same requirements apply to the circuits connected to the control interface of a controllable# \5 o7 C/ L. H( T5 F0 S' B
luminaire where it is required to maintain the same level of insulation for all components. On$ }# ?, h! Z& O, ]
the evaluation of the type of circuit to be considered, the information given by the controlgear
' g% ]2 E' n! }2 O5 ?& O% amanufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.
# A; H6 W- c% n* F* FNote: at present on the market the following types of control systems are available:& P' X. o$ G' |9 k* S6 ]1 |) m w( p
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and
2 k6 s9 M6 {2 _, g) n6 l S1–10 V DC controls)( C7 Y8 z7 [( J5 ^( @7 O5 B
- SELV Control signal, (e.g. DMX)
( C4 C0 f/ `" E) j- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)1 @5 S* T, h7 [! Z/ P
Compliance is checked by the following requirements.: q% j4 |! t v8 B2 K
' N5 v K+ ^2 }) o+ |+ S# O8 E4.31.1 SELV circuits; g7 z+ t1 s4 S( ^/ d& W" J- S
The following sources may be used to supply SELV circuits:
( h/ O7 D8 u ]/ i- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of1 x% ]% O( z! H, f- h
61558
; n; y8 K3 Q1 S1 J, c/ m- A controlgear providing SELV in accordance with IEC 61347 Series
0 q# f" b% u9 D# M( ^8 t6 e- An electrochemical source (e.g. a battery) or another source independent of a higher. \1 s# G! l# v' B6 l) {+ z/ g
voltage circuit
9 e6 L2 g8 o( M* E4 n& z( I) eThe voltage in the circuits shall not be higher than the limits defined for ELV.
* z$ _; y! u, V8 }# F: g$ c+ w' u- Q( ASELV circuits shall be insulated from the LV supply by double or reinforced insulation (based
. j& J) n8 D; k3 u) m6 s; L- hupon a working voltage equal to LV supply voltage).
6 z, {) z( W" |, [" { i- p5 xSELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or) ?: a' ?; E' r
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).
9 K. T0 @, l: o, r# Y* i# M. }2 USELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a
% U8 [ j) B- Iworking voltage equal to LV supply voltage).+ @+ S3 ], k8 j2 T5 W1 O5 k( r6 N
SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a# ~; [: o# p7 k. G, u# X
working voltage equal to highest voltage in the circuits)
& o. t B$ o+ k6 ~& RSELV circuits shall be insulated from accessible conductive parts by an insulation according to
5 ?7 v: D# b) E0 q, v; ntable 1 in Annex X.
; f' a1 z' E. o: ?& ONote: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for' p, z, y/ M* F
insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.# S4 U" v; @& ~$ u: g3 ]' F* i
Compliance is checked by inspection and by the test required in clause 8, 10 and 11 of this
5 U! U/ u+ J8 }0 U# d6 k& ]standard- D; x6 l. f% n; U& ] B" t8 H
Plugs and socket-outlets in SELV systems shall comply with the following requirements:
/ N: `; J' C a1 \- plugs shall not be able to enter socket-outlets of other voltage systems;
# m3 _8 {2 [! t7 S4 ~7 e5 M8 I- socket-outlets shall not admit plugs of other voltage systems;
6 ~4 E C4 Y( x6 U6 `4 I- plugs and socket-outlets in SELV systems shall not have a protective conductor
3 E1 t S" W: n5 \% M" M+ wcontact.
# W$ `& Y/ J) N' fCompliance is checked by inspection
, H( H; \) @& s( R5 `9 W
( {( E S7 d5 G( ~9 C8 t4.31.2 FELV circuits# Q) C z/ d) o+ B) {, V
The following sources may be used to supply FELV circuits:
9 A; ~4 L3 c; J, m- ^# C5 }- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of' l4 Y4 w9 |' [
61558
' b) |' B+ _* p# s% T& q$ A- A separating controlgear providing basic insulation between input and output circuits in
9 S4 |* l1 f# L4 v2 K, Uaccordance with IEC 61347 Series+ S" P! G' s7 D! k- q6 T/ E
- An electrochemical source (e.g. a battery) or another source in circuit separated by the
- B) u" c! f5 `; P5 ZLV supply by basic insulation only.
& H, l2 v( i7 L% q2 W( h' T2 c8 @The voltage in the circuits shall not be higher than the limits defined for ELV./ B. B0 v! L5 O8 t
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a) n) W5 p" }) q) c, e2 K. B
working voltage equal to LV supply voltage).
* k6 [8 j5 `% `- `/ p0 yIt is not required that FELV circuits shall be insulated from protective earth circuit except for
- k1 E( R. w( A1 m# [6 Nfunctional purpose.
$ o9 V+ l5 k ~1 mFELV circuits shall be insulated from by an insulation according to table 1 in annex X.
7 z1 E% s8 G* d9 F; fCompliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
4 F) p( K1 N( |2 bstandard) q+ ~, M; r9 z% I) u
Plugs and socket-outlets for FELV systems shall comply with the following requirements:5 H7 n! g* P3 N. c0 `8 W
- plugs shall not be able to enter socket-outlets of other voltage systems;
: Z: C) s, V5 g( S+ B/ k% g) k- socket-outlets shall not admit plugs of other voltage systems;/ m, d% x% t, h1 F/ r0 w
- socket-outlets shall have a protective conductor contact. Y; f" c% w6 @$ V W
Compliance is checked by inspection5 r% [7 M: a0 W, L/ V( I6 ?. Q
# G* `1 u( d) m1 w1 h& W4.31.3 Other circuits:
( ^- g- \0 Y8 O( g, u8 t* yThe insulation between circuits other than SELV or FELV and accessible conductive parts shall
. w$ P$ N3 Z. ?, @5 Lbe in accordance with the requirements in table 1 in annex X.* ~7 K. h) R9 R5 Y
In class II construction, where equipotential bonding is used for the protection against indirect: S8 w# G: Z, \& M
contacts with live parts (see table 1 in Annex X), the following requirements are applicable:
: ^3 }+ ?$ V. I- v" n" w8 c3 Y- All conductive parts are connected together so that two failures of the insulation result
& W5 m# u3 O$ E: |, ~# ein a short circuit
* @& y8 \, C/ ^ H' z( Q+ [- To check whether the conductive parts are reliably connected together, the test in
0 p9 Z8 g8 W& F0 D5 H2 T, [) k1 A7.2.3 (earth continuity test with 10 A) have to be carried out; k0 B6 q: E5 ^2 a, y z
- the conductive parts comply with the requirements of annex A of this standard in case
8 t% A6 \- x, a( Uof insulation fault between live parts and accessible conductive parts.
: z+ q0 m- U4 k9 B: I5 h- For master/ slave applications (the control gear is mounted in the master luminaire and" \& R6 X4 F' Q/ L' C
supplies the slave luminaires) an equipotential bonding between the luminaires shall be, n {0 F2 V0 F; G* p1 w
used to prevent dangerous voltages between accessible luminaires. For this reason: `% j. u+ N R; I
master luminaire shall be provided with a terminal to connect accessible conductive K5 R, `& r& Z0 _8 x" e7 o
parts of the slave luminaires and the slave luminaire shall be constructed as class I* x- \( v! h5 F
luminaires.+ T! P4 d* ^3 ~) n( ^+ ?
Compliance is checked by applying the requirements of this standard to check to the insulation- h. w: n1 o+ |$ O/ @ e
required in Annex X
7 K5 i: A" F7 I9 k8 W, V" p/ \; f4 y3 ?; Z
Note: Example of this kind of circuits are:$ D( g/ u( d3 W5 ?
- output circuits of ballast according to 61347 series7 {# V# t3 u5 T5 z
- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent7 q) e4 O/ |* b: K4 w& j- v7 a
- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the
4 A ]% c& j: p, Lrequirements for FELV
! \0 ?$ L5 \: X! x9 o1 s- circuits supplied by separating controlgear (other than FELV) and isolating controlgear
) f) d S- v2 \) t4 d+ s6 Naccording to IEC 61347-Series
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