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4.31 Insulation between circuits+ p. F( v5 V! G" i: x7 B
Luminaires incorporating transformers or controlgears providing insulation between circuits and3 m' l7 P4 S0 C. E% J" z6 ?* |; A& I
luminaire using circuits insulated from a LV supply, shall provide suitable insulation between A5 w8 u7 M% f9 I! m5 \ o9 p% w
circuits and between these circuits and the external accessible parts.# D2 c$ S# G: o9 s/ [1 e" I+ t, A/ Z- z
The same requirements apply to the circuits connected to the control interface of a controllable
8 A1 k/ q F& V+ e0 v/ Hluminaire where it is required to maintain the same level of insulation for all components. On; J7 G) R4 V3 R& l; U
the evaluation of the type of circuit to be considered, the information given by the controlgear( ^4 ~) c( J0 _& f: t; P$ k
manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.
; `1 r6 J8 m8 s- _+ BNote: at present on the market the following types of control systems are available:1 K3 y, u( z3 j, y: ?
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and
Z R9 k- T" z8 v4 T% S1–10 V DC controls)' G+ h: p" P0 B, }: H& z" f
- SELV Control signal, (e.g. DMX)
' \9 m$ v/ ^& z& n- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)9 ?" b6 Y$ u3 j
Compliance is checked by the following requirements.
1 M7 X: L7 l3 `9 q% j( C
+ v8 [) Q/ d/ A7 A4.31.1 SELV circuits
! h( j. O% W' [8 z. pThe following sources may be used to supply SELV circuits:. t" R4 Z5 F/ w' J B2 p# t7 s3 h$ s+ F
- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of T. P) r- J9 s) A" B( H8 P& g
615581 N+ O' p- l' ]( H) Q
- A controlgear providing SELV in accordance with IEC 61347 Series' P2 k1 {( g# T8 J
- An electrochemical source (e.g. a battery) or another source independent of a higher
3 R0 N4 v& @$ S, ivoltage circuit" x1 `3 }8 ^0 q) ^( c
The voltage in the circuits shall not be higher than the limits defined for ELV.# W4 e3 ~& L1 K
SELV circuits shall be insulated from the LV supply by double or reinforced insulation (based
8 P( v' D& E. t0 S4 ~3 Q; qupon a working voltage equal to LV supply voltage).
+ O$ f/ j) z4 I$ @- sSELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or$ T$ A V L5 a
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).9 F6 S1 M# ~4 p5 ^
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a9 M/ d" e# ?1 e3 w
working voltage equal to LV supply voltage).- s. \' |7 Q" e' Y2 ^
SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a! x4 ~9 ?0 a) d
working voltage equal to highest voltage in the circuits)
. Y; e7 [2 X7 p7 ZSELV circuits shall be insulated from accessible conductive parts by an insulation according to1 P7 `, o( H6 u! D' [
table 1 in Annex X.
9 { b# H% k. s4 zNote: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
- n+ I u7 Y1 |insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
# V, x$ z; I! Z1 z! uCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this2 V2 _" [& D- R* G. [$ i. a
standard0 q2 E: g, M+ l2 P3 a% ^5 b3 G
Plugs and socket-outlets in SELV systems shall comply with the following requirements:
9 B) k L6 ]4 Q0 i6 Z9 X" j- plugs shall not be able to enter socket-outlets of other voltage systems;8 n3 O* u* s/ U* o$ J8 p
- socket-outlets shall not admit plugs of other voltage systems;
( }( a+ H0 Q/ n1 \3 K$ Z5 h- plugs and socket-outlets in SELV systems shall not have a protective conductor
6 T, }; [8 {' D% p5 Vcontact.
# [( P: ?1 p% O" [9 s: x' v0 O1 SCompliance is checked by inspection
& Q2 k6 U$ j. w2 m) H* q# z; q% k. f+ x7 q, c. ~- I
4.31.2 FELV circuits5 r+ x* f* ?9 u Z V O! V" U' C
The following sources may be used to supply FELV circuits:: e# y; [ d m, u7 P8 o
- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
6 w+ k6 E! a, ?0 S, q615582 H; m& T4 b. G A
- A separating controlgear providing basic insulation between input and output circuits in
! F6 r8 d, O" W6 h6 Xaccordance with IEC 61347 Series
& F7 f' C+ }( Y: ~% g- An electrochemical source (e.g. a battery) or another source in circuit separated by the+ L( l. {- m% p" ]$ O
LV supply by basic insulation only.
* J* q2 B( w) I, }' {' |- k; y( xThe voltage in the circuits shall not be higher than the limits defined for ELV.
# t2 e& L4 l3 e4 a( ]" m7 oFELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a1 C8 b. y& N9 }9 A
working voltage equal to LV supply voltage).
9 a+ i$ z5 K* Z# ^: t! QIt is not required that FELV circuits shall be insulated from protective earth circuit except for: K0 _, [/ c: ^
functional purpose.- M' u9 u! N0 w' P/ n
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.
7 B3 Y7 z: i. ]7 R$ I/ }( {Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
2 m! U" `4 y7 n+ Z* G! F |standard) m: W$ X, `7 T0 E. _* j& z( u% o
Plugs and socket-outlets for FELV systems shall comply with the following requirements:, @( n/ p" m6 W
- plugs shall not be able to enter socket-outlets of other voltage systems;
2 a, q2 _8 h* x/ S% t D/ r( q- socket-outlets shall not admit plugs of other voltage systems;, M$ W4 I. [. p8 N
- socket-outlets shall have a protective conductor contact.
$ c3 Q7 h7 G) H' s! dCompliance is checked by inspection D0 i: Q8 A! j/ q/ i% s
- X3 J. \& `8 m5 W
4.31.3 Other circuits:
' F$ I# I, [% `( ~9 q" yThe insulation between circuits other than SELV or FELV and accessible conductive parts shall
u- i4 M4 T P# e9 n5 X: F% ebe in accordance with the requirements in table 1 in annex X." ~' o6 K. B9 |2 E
In class II construction, where equipotential bonding is used for the protection against indirect
- v5 J5 S2 S7 M0 F8 \contacts with live parts (see table 1 in Annex X), the following requirements are applicable:1 r, E' V8 Q3 g5 e" {+ V: }( r3 l
- All conductive parts are connected together so that two failures of the insulation result
2 s5 K/ @, E3 ]* h1 \in a short circuit9 w3 J( k O3 K) w6 b5 G
- To check whether the conductive parts are reliably connected together, the test in% x* h% D# L7 K3 W7 ]9 h& {
7.2.3 (earth continuity test with 10 A) have to be carried out) ?5 C8 D6 Y( Z4 }2 N
- the conductive parts comply with the requirements of annex A of this standard in case4 m- E9 T1 Z5 H
of insulation fault between live parts and accessible conductive parts.
* n, K/ S1 k% S, l! C* K/ E- For master/ slave applications (the control gear is mounted in the master luminaire and
, Q8 K. h( T ^3 x: gsupplies the slave luminaires) an equipotential bonding between the luminaires shall be
9 g8 q F0 {3 b5 @2 p4 zused to prevent dangerous voltages between accessible luminaires. For this reason" X# x5 n% e. z: M; y1 z
master luminaire shall be provided with a terminal to connect accessible conductive" {2 L2 T1 l# m: x' ~9 q5 O
parts of the slave luminaires and the slave luminaire shall be constructed as class I
A2 A/ |+ C s/ ^9 rluminaires. ?+ O* Z0 t% i( F0 _$ c
Compliance is checked by applying the requirements of this standard to check to the insulation( Z' I: Z, B- W2 w3 D
required in Annex X6 d4 a6 n; |+ m
}" `0 w; ~/ |* i/ f
Note: Example of this kind of circuits are:- E& h( i* b3 [7 W0 n
- output circuits of ballast according to 61347 series% G& I, G% }4 o# ]6 S
- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent
$ H. `( Z) r' L8 i- E( R- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the+ Y& O1 o; N. N- c7 P& T
requirements for FELV% S! F; w: }# W& ]2 {
- circuits supplied by separating controlgear (other than FELV) and isolating controlgear
7 K+ m5 m! `% V p. G( a& c" R5 |according to IEC 61347-Series
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