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4.31 Insulation between circuits
. b4 d1 }7 c8 X4 `2 R. ILuminaires incorporating transformers or controlgears providing insulation between circuits and! r6 L7 \$ `2 X/ B4 Q7 r( ^
luminaire using circuits insulated from a LV supply, shall provide suitable insulation between
+ {4 [% K$ A$ j2 ~$ m4 {+ Jcircuits and between these circuits and the external accessible parts.6 i) ?+ g* j; N: `
The same requirements apply to the circuits connected to the control interface of a controllable
, g: _8 `' M/ r+ h' H6 _luminaire where it is required to maintain the same level of insulation for all components. On
5 Y$ q- ~' O0 L3 V. q5 Xthe evaluation of the type of circuit to be considered, the information given by the controlgear
3 H' r/ |/ }* ]manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.
- ?/ m+ y- O7 ENote: at present on the market the following types of control systems are available:8 D _6 A" s, [+ u
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and) N4 f2 m! o9 V
1–10 V DC controls), l6 d; x3 \" d! d7 C
- SELV Control signal, (e.g. DMX)
# A0 Y( E: ^6 b( c( B* a) {; V) m- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
( _) M c" h0 f8 ^. j8 G6 oCompliance is checked by the following requirements.
' @ R7 @3 E5 i, ]! S* f
% q! @3 m* W2 _& s4.31.1 SELV circuits/ h N( E2 X/ q8 [# p Y; ~( `) s/ u# U
The following sources may be used to supply SELV circuits:# I; R+ H7 q6 T7 o) o- R' s/ L
- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of# f8 [4 K/ j' e- [5 D
61558
7 Z3 E& v2 U" L7 m- F9 V6 ~. e5 o. q- A controlgear providing SELV in accordance with IEC 61347 Series
9 x6 v% G, D4 ?' M$ P+ S/ Q: @( y- An electrochemical source (e.g. a battery) or another source independent of a higher
+ N' J- p* }; c* m7 Yvoltage circuit% o6 m7 K, C& ?
The voltage in the circuits shall not be higher than the limits defined for ELV.
5 `) L: Y/ s8 f7 kSELV circuits shall be insulated from the LV supply by double or reinforced insulation (based
: e1 o; R; k) i& M# oupon a working voltage equal to LV supply voltage).
F7 |: ?& D% s& u, ySELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or$ q4 T; P0 p6 w' A! w
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).: F1 P9 e; G* M' Z* @
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a
' \) F$ f, \5 i# a7 J3 q0 Vworking voltage equal to LV supply voltage).
$ I, C( ?7 ?: l/ j# dSELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a3 `* i0 f+ q2 e2 Z" |0 B1 H
working voltage equal to highest voltage in the circuits)
0 q/ y( H' C+ F2 P5 H: cSELV circuits shall be insulated from accessible conductive parts by an insulation according to
. Z+ [' o' X2 K9 n4 [' mtable 1 in Annex X.
0 p2 C2 F+ `2 a" [/ H q# {- }$ l4 `Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
% \. H5 g( z T6 `insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
6 f* v. C9 J/ N0 {( e" c" C( PCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this. F3 y6 @% W! K) v
standard
+ B9 Z) w& {4 n/ APlugs and socket-outlets in SELV systems shall comply with the following requirements:- f2 X4 ` M3 h) w4 y( q
- plugs shall not be able to enter socket-outlets of other voltage systems; W* M' B5 \0 ]
- socket-outlets shall not admit plugs of other voltage systems;& f' O7 @2 s+ }1 l. {1 T
- plugs and socket-outlets in SELV systems shall not have a protective conductor
( R# v$ x9 r. `- Hcontact.$ s( h _2 ^% V( Y' i% e- o8 Y! I
Compliance is checked by inspection
3 q: I4 {. M- ]0 N$ `. o- ]" E# `- y: |3 h7 ^( f6 x7 `
4.31.2 FELV circuits. L- s& F2 D8 f4 R
The following sources may be used to supply FELV circuits:
1 j6 {* w& w& G. B6 u/ C' G- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of7 \6 A# H4 p8 _; `
61558' x7 h4 M0 a, h
- A separating controlgear providing basic insulation between input and output circuits in
1 A! y$ I; U" W4 jaccordance with IEC 61347 Series
% f. \( g8 K* c$ A6 [" E& R- An electrochemical source (e.g. a battery) or another source in circuit separated by the1 ~1 g5 `% U9 s% r: }* z
LV supply by basic insulation only.9 X8 U) D/ C+ _5 r* T
The voltage in the circuits shall not be higher than the limits defined for ELV.
4 O6 ^6 b$ M0 x3 M; |FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a0 {0 A3 J5 @* ~- g- k& u
working voltage equal to LV supply voltage).' f, P7 j' ]# S2 Y" G" B O
It is not required that FELV circuits shall be insulated from protective earth circuit except for9 s5 K! R: C$ f ~6 u# H1 g
functional purpose.
" t3 k6 d: {) D5 d( N: V" gFELV circuits shall be insulated from by an insulation according to table 1 in annex X.* M; A6 ~+ y1 P( h: r. r
Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
* H. ]6 d" _5 B- j% [) ~( ]$ Sstandard. G3 Q# W0 x/ g' s# L% L6 \% K
Plugs and socket-outlets for FELV systems shall comply with the following requirements:) j( H8 N9 B4 u8 l; ?7 r
- plugs shall not be able to enter socket-outlets of other voltage systems;
) s+ ?/ }" p$ g3 r' u- socket-outlets shall not admit plugs of other voltage systems;: S- t$ f) N2 z
- socket-outlets shall have a protective conductor contact.5 M/ p: j9 n2 Z. F- h* } O
Compliance is checked by inspection
7 E9 O6 t2 D* w; J {* d: v
3 o" b7 B8 |& a) d4.31.3 Other circuits:
' M# e8 X/ T- Y- ?The insulation between circuits other than SELV or FELV and accessible conductive parts shall' I! Y& y8 c1 x- a* d- C) b8 i E
be in accordance with the requirements in table 1 in annex X.
: z+ v8 F/ n& C* I1 N, Q8 QIn class II construction, where equipotential bonding is used for the protection against indirect
; y2 _& C7 k5 p' S- z; X. Z* rcontacts with live parts (see table 1 in Annex X), the following requirements are applicable:8 e/ q8 O' v1 e" E' l R. N
- All conductive parts are connected together so that two failures of the insulation result) H9 |! Z2 T1 C7 F K/ {5 \
in a short circuit
$ F3 w9 @9 i% Y6 B( T7 R- To check whether the conductive parts are reliably connected together, the test in
$ z) {7 f9 T6 d: D7.2.3 (earth continuity test with 10 A) have to be carried out3 Z" ^( a9 @ B
- the conductive parts comply with the requirements of annex A of this standard in case8 @3 w+ A9 ]3 o: n9 F+ K; _2 N
of insulation fault between live parts and accessible conductive parts.
$ B7 w3 b- { S4 ]; o, R! m# i7 F- For master/ slave applications (the control gear is mounted in the master luminaire and
6 d8 N2 Z& }: Q2 Y9 v% n' Bsupplies the slave luminaires) an equipotential bonding between the luminaires shall be4 A% P5 I+ `) b5 l6 Z( `- r# e
used to prevent dangerous voltages between accessible luminaires. For this reason. G" g$ N) M/ F# _" D
master luminaire shall be provided with a terminal to connect accessible conductive0 _7 _% `, Q$ N* a
parts of the slave luminaires and the slave luminaire shall be constructed as class I7 _* ?( [5 ^+ z% F% X. I5 \% R
luminaires.
" }* x. ~ R$ a# T9 R8 hCompliance is checked by applying the requirements of this standard to check to the insulation
6 H2 I. K; k+ \- y7 V% m3 Q; L4 o* hrequired in Annex X
) Q5 x) F4 t+ _- Y( Y* L2 D$ C) y. d \$ X
Note: Example of this kind of circuits are:
; K8 ], }9 _( D6 V* ?/ Q- output circuits of ballast according to 61347 series
/ g9 @5 u( ~# W, L# p: l- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent) O, J2 @+ B/ ]* C2 ]- K
- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the
3 G# v9 k4 `- R" \) Urequirements for FELV8 q1 d2 u: a. H. m* M% {8 t
- circuits supplied by separating controlgear (other than FELV) and isolating controlgear) ?% A! i1 O9 v4 a& z% I( O( X1 e
according to IEC 61347-Series
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