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4.31 Insulation between circuits
) p: f" x$ J# n) O. G: V5 S; fLuminaires incorporating transformers or controlgears providing insulation between circuits and* V+ n' R9 ]. y+ |
luminaire using circuits insulated from a LV supply, shall provide suitable insulation between
: U& t4 b5 F2 I# w0 a( P8 C7 a! Lcircuits and between these circuits and the external accessible parts.
1 Z5 Y! g; P& Y s3 rThe same requirements apply to the circuits connected to the control interface of a controllable
# \( K6 T" ~3 @$ eluminaire where it is required to maintain the same level of insulation for all components. On
/ L/ o$ G: k0 T2 n5 c% {/ d. Mthe evaluation of the type of circuit to be considered, the information given by the controlgear( f" d7 k! }. S" ? P+ M
manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account., X, ]6 U0 W3 h* \% N( F
Note: at present on the market the following types of control systems are available:) w1 U p) O0 _4 x' b& x
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and
3 i- J3 ^" b% q( }3 y1–10 V DC controls). J0 ^- |, \* t7 v, P
- SELV Control signal, (e.g. DMX)% J/ j6 o( I6 }% x
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
/ _ H) z# } G4 bCompliance is checked by the following requirements.( c1 J0 c1 @5 E
' g7 {; Y' F0 o0 M) L8 y5 \# d7 p x
4.31.1 SELV circuits
& o' ~: }2 Y8 o1 o- c w$ HThe following sources may be used to supply SELV circuits:; [7 J% p# S/ i% y
- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of
b( m5 ?3 p: ]) H, `61558
% `2 t% f4 g* v- d- A controlgear providing SELV in accordance with IEC 61347 Series4 _0 i+ p/ c. l6 O- {
- An electrochemical source (e.g. a battery) or another source independent of a higher
: f' W# g {: o' |+ N) {1 [voltage circuit
6 r. q3 U; }, A( {, aThe voltage in the circuits shall not be higher than the limits defined for ELV.
9 z4 O0 Y. I# I$ TSELV circuits shall be insulated from the LV supply by double or reinforced insulation (based; P1 y8 ?9 t& z7 K! z* K
upon a working voltage equal to LV supply voltage).6 @# b8 J. y; q4 ]! s* d
SELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or
t+ g' G+ k$ w6 i X1 g1 V7 u0 preinforced insulation (based upon a working voltage equal to highest voltage in the circuits).0 {$ J& L% x- c
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a/ T( @" y7 v$ W+ f R0 C+ U0 A3 f
working voltage equal to LV supply voltage).# S6 W; Q- W$ y* j! y \
SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a
! X- k# w# w: P9 iworking voltage equal to highest voltage in the circuits)7 x& L4 Z3 D$ T
SELV circuits shall be insulated from accessible conductive parts by an insulation according to
7 x$ H4 @6 a4 [# E6 Z! j+ ], Ttable 1 in Annex X.1 V. Z- |% V* m% d. R
Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
$ n1 v8 |0 U& [- t8 A$ X! oinsulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
6 t! o* O- Y- `2 ?) {* }0 XCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this( ?8 D* u- y9 x
standard
' a+ o3 d! p; B) S7 n( ~5 W- R6 rPlugs and socket-outlets in SELV systems shall comply with the following requirements:
& V$ V' n: u6 N3 u$ `. B6 z; W8 ?/ X- plugs shall not be able to enter socket-outlets of other voltage systems;
8 J9 [' ~! w& p1 o w6 r- socket-outlets shall not admit plugs of other voltage systems;: o9 b# J8 R3 q! z R9 L
- plugs and socket-outlets in SELV systems shall not have a protective conductor
, r& H+ W; F# D: @, hcontact.: e$ r9 \( z* s# R5 n0 c3 b8 ^1 \
Compliance is checked by inspection
, L) z7 t _# `- k& S- i5 A
T. x) `: o; ^+ f- @0 b" Y4.31.2 FELV circuits v# F. y( X# Y x2 w d
The following sources may be used to supply FELV circuits:
* ^: k6 j: Y7 G! |# @- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of9 |4 e7 ^* ^- t, o! a
615583 H- C4 `+ Y5 B( w" W' n
- A separating controlgear providing basic insulation between input and output circuits in3 p; W0 _* A+ F: b; O: W$ {
accordance with IEC 61347 Series* G8 _8 f: M9 T) Q8 ]7 N
- An electrochemical source (e.g. a battery) or another source in circuit separated by the
' B$ s$ B' w5 JLV supply by basic insulation only.
$ K5 p5 I8 k- h/ X5 \/ YThe voltage in the circuits shall not be higher than the limits defined for ELV.8 ^+ }; X+ O$ h9 @* J
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a
- p" e9 J3 P) P% o# Yworking voltage equal to LV supply voltage).; q* y t3 @# U& V8 Y% a7 i4 Q
It is not required that FELV circuits shall be insulated from protective earth circuit except for( r3 r' N* L9 `: ?
functional purpose.
8 p7 q. o4 j F9 V3 g5 A4 h, ]FELV circuits shall be insulated from by an insulation according to table 1 in annex X.; f, s9 {8 T! E6 i+ o( U( p
Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
4 X$ L$ V. ~% U9 v& Istandard
' Y/ N& v4 G, u3 p" C7 rPlugs and socket-outlets for FELV systems shall comply with the following requirements:* [/ h* B( A/ H! w, H4 r
- plugs shall not be able to enter socket-outlets of other voltage systems;
& T% t0 @5 O7 F- socket-outlets shall not admit plugs of other voltage systems;
8 d$ Y. ~0 M! L! Y/ _- socket-outlets shall have a protective conductor contact.
) u( H c2 F" Y% QCompliance is checked by inspection4 i: i2 Z1 W' x& W7 J
- s! x1 d4 f7 N k4 i( H( _3 O7 Z4.31.3 Other circuits:! R! ^9 O, \/ ]1 t
The insulation between circuits other than SELV or FELV and accessible conductive parts shall
( L i3 ?$ W% R, Cbe in accordance with the requirements in table 1 in annex X.
/ g# [) l+ b, A2 I/ B# h3 R3 W$ }In class II construction, where equipotential bonding is used for the protection against indirect u+ V) X5 j9 z1 T, e
contacts with live parts (see table 1 in Annex X), the following requirements are applicable:+ ? d' b1 ] ]0 l: J' t2 Q" j
- All conductive parts are connected together so that two failures of the insulation result1 [% f4 h9 L# ~7 i/ h- Z
in a short circuit
% A& [6 i# V" c X- X( T' v- To check whether the conductive parts are reliably connected together, the test in
( @; o$ t- R4 i& j( V3 R7.2.3 (earth continuity test with 10 A) have to be carried out
5 x; C! i4 D( [' R- the conductive parts comply with the requirements of annex A of this standard in case
, F$ I' W8 m; o* Q# S7 Y/ {' u9 z8 {of insulation fault between live parts and accessible conductive parts.
! D! U {9 N$ [; }* m- For master/ slave applications (the control gear is mounted in the master luminaire and6 L$ i# j6 J( k" l/ b# n+ s+ }: S
supplies the slave luminaires) an equipotential bonding between the luminaires shall be+ n, U% C0 j' L- t; G0 H
used to prevent dangerous voltages between accessible luminaires. For this reason' V- j; D: D$ i H/ X
master luminaire shall be provided with a terminal to connect accessible conductive
: t" t! X% _' V+ M* e* fparts of the slave luminaires and the slave luminaire shall be constructed as class I
- m4 n- z" R3 D$ zluminaires.1 e7 Z) L7 Y+ w% R$ A2 k
Compliance is checked by applying the requirements of this standard to check to the insulation& b9 s9 O( R F+ B& x1 r( ?
required in Annex X4 Y5 p: t" n5 A M
. ?, _" N* M; G \Note: Example of this kind of circuits are:. B Z% i7 X! G
- output circuits of ballast according to 61347 series
. W( w8 ?3 ]: a9 a# d1 k- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent
9 B; ?& Z7 H( S' o6 }2 Q- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the
. \+ |; O) J4 L6 r+ ]: ~- orequirements for FELV$ s0 A" } z, y6 n5 n: E
- circuits supplied by separating controlgear (other than FELV) and isolating controlgear, G. H6 q( V% d* W9 S9 S7 O
according to IEC 61347-Series4 |7 J/ I. w$ m7 h1 Y0 n- |0 e
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