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4.31 Insulation between circuits
$ s! A1 `, q; K+ ^. K( f0 QLuminaires incorporating transformers or controlgears providing insulation between circuits and; `; ~( t" H! F* J1 \. G3 o, O5 Q
luminaire using circuits insulated from a LV supply, shall provide suitable insulation between+ T( \% n3 s- p! o
circuits and between these circuits and the external accessible parts.
. B9 F9 S3 p c E, X/ UThe same requirements apply to the circuits connected to the control interface of a controllable
0 ^- O! j1 o7 P* t, I/ L, hluminaire where it is required to maintain the same level of insulation for all components. On
) l: p' _! G6 O3 N4 zthe evaluation of the type of circuit to be considered, the information given by the controlgear
$ @2 Y. c* x" ]2 U' zmanufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.( o- a) N& U+ u4 D: O) G- E) t& L1 s
Note: at present on the market the following types of control systems are available:
) `( u7 {( p% K- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and9 O' [% r, a! k* O
1–10 V DC controls)
+ V4 c6 Y) ^3 u6 c% S- SELV Control signal, (e.g. DMX): L; M4 j1 l8 ?% T
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
' T$ q4 F- Y% Y# S4 \0 ]Compliance is checked by the following requirements.; f( Y O6 k0 b1 J& _; g
6 r$ Z+ r V( t; q4.31.1 SELV circuits5 s. a3 a9 n& ?+ s
The following sources may be used to supply SELV circuits:
/ u& b( }# z1 ?6 {, ?. a" l- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of2 _/ F+ j- C- v& {/ z, q. D
615586 P2 p$ X' E. q/ I
- A controlgear providing SELV in accordance with IEC 61347 Series
1 V: P3 H$ C5 F6 S: {- An electrochemical source (e.g. a battery) or another source independent of a higher
! R! C% H* ^( K) u( Z( a: p! _voltage circuit: T- [, O9 H2 S) x
The voltage in the circuits shall not be higher than the limits defined for ELV.$ x% s" V0 m- C) d+ T" d/ l
SELV circuits shall be insulated from the LV supply by double or reinforced insulation (based6 \! Q4 b) E- x7 j9 j
upon a working voltage equal to LV supply voltage).
8 _4 E, g+ Z FSELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or- b" _. K5 ?- G! [( _
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).
- h4 P6 A- _! h# `) ~1 jSELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a! i5 W6 B" m5 o
working voltage equal to LV supply voltage).
3 [6 p3 h/ C7 Y# v3 p' A7 {SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a" R( v4 L- o5 v4 ?) @
working voltage equal to highest voltage in the circuits)
2 s0 ?& J2 R1 w- ?SELV circuits shall be insulated from accessible conductive parts by an insulation according to
: A! S5 o, I$ y5 `table 1 in Annex X.4 a+ z9 R' N7 [* X6 _. N6 M; U
Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
/ V$ V4 {- o1 d% @insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.& D1 }* Y" M( q5 G$ x' A6 T
Compliance is checked by inspection and by the test required in clause 8, 10 and 11 of this
* p2 |6 Q/ h8 C3 n7 vstandard. c4 ~& x# d2 G1 ?
Plugs and socket-outlets in SELV systems shall comply with the following requirements:( U8 r$ \: }( Z8 k! T5 }
- plugs shall not be able to enter socket-outlets of other voltage systems;
( S/ i/ R. t- E* {- ~1 R! N9 M- socket-outlets shall not admit plugs of other voltage systems;; X% _8 W Y k, R
- plugs and socket-outlets in SELV systems shall not have a protective conductor
6 b% W! E! t+ R- X3 J7 econtact.
$ c/ _& z# Y3 {2 F- oCompliance is checked by inspection% K5 r1 A- k$ Z6 l( B1 @
" N3 z: q' P' f/ \( W4.31.2 FELV circuits3 w5 X0 t8 m3 T5 @" U$ ?! ^
The following sources may be used to supply FELV circuits:
2 N( |) J: ]. e) A) F# s- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
- k. R7 L1 Q, s) Y6 I6 A5 l' W61558
3 a9 d; D1 Z$ Q" F- Y$ w- A separating controlgear providing basic insulation between input and output circuits in% N4 r4 Q' ~- t- z
accordance with IEC 61347 Series
# H2 Z5 m# Q# t9 O" U+ C- An electrochemical source (e.g. a battery) or another source in circuit separated by the
$ B `6 Z: ~# m1 X cLV supply by basic insulation only.* i( u+ B. r9 m& Z4 g
The voltage in the circuits shall not be higher than the limits defined for ELV.6 [' ~ W: t1 r# K ], _
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a+ E7 ~+ z. o f. D
working voltage equal to LV supply voltage).
/ m3 E4 J' p+ [! B. Z1 T HIt is not required that FELV circuits shall be insulated from protective earth circuit except for
2 k% I5 Q. c, zfunctional purpose.1 Q7 E% J' K2 O# j4 A- F
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.
2 q* v# f: x" G3 `# u! ^& @Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
) n& J A3 p: _& ~5 T, ?7 M: astandard+ ?) \: E* K3 y/ v6 B! J6 ~
Plugs and socket-outlets for FELV systems shall comply with the following requirements:
/ ^' R1 g6 N1 p/ w1 _% _! ^- plugs shall not be able to enter socket-outlets of other voltage systems;. B1 L3 v6 y% j3 r5 Z% k4 D2 ]
- socket-outlets shall not admit plugs of other voltage systems;" Z* z- x4 J# _
- socket-outlets shall have a protective conductor contact.2 C5 _, P! y. u% f5 K. @
Compliance is checked by inspection0 {$ v4 \2 }& D: }( |) m" h
( t. ]+ b L$ k! F
4.31.3 Other circuits:5 l; w' R* z* x5 P; F) w0 ^
The insulation between circuits other than SELV or FELV and accessible conductive parts shall7 P2 q2 C2 {$ v T( T' ?
be in accordance with the requirements in table 1 in annex X.* [* t, `+ \" s W5 u' J* M
In class II construction, where equipotential bonding is used for the protection against indirect
! p( | [ H- I3 x: S) L' w( xcontacts with live parts (see table 1 in Annex X), the following requirements are applicable:
) J* D" I6 z4 |- ~4 I b- All conductive parts are connected together so that two failures of the insulation result
3 ~, V7 s2 @1 O; U: Oin a short circuit) m9 Z4 S; ?- p/ N
- To check whether the conductive parts are reliably connected together, the test in
' n! A$ r+ _# f; f$ V/ m9 z( S7.2.3 (earth continuity test with 10 A) have to be carried out' z9 P$ i! W! b5 K1 [4 T& |
- the conductive parts comply with the requirements of annex A of this standard in case
7 l$ ^- w ^2 f3 K0 B$ Yof insulation fault between live parts and accessible conductive parts.
5 R- X9 C& w% \2 C9 D- For master/ slave applications (the control gear is mounted in the master luminaire and
( Z5 C& {7 s* P6 o; F/ G" Esupplies the slave luminaires) an equipotential bonding between the luminaires shall be% t7 d# q9 ?, V! f- J
used to prevent dangerous voltages between accessible luminaires. For this reason! \8 D; h/ C8 v7 C. l
master luminaire shall be provided with a terminal to connect accessible conductive, C- a \, ~% }
parts of the slave luminaires and the slave luminaire shall be constructed as class I
5 T9 c; M( L6 v7 i8 D% eluminaires.
! |' ]& P8 s( j8 y5 {' @Compliance is checked by applying the requirements of this standard to check to the insulation
' |9 q$ T' J# `0 erequired in Annex X [; v+ ~1 I+ |1 n1 Z( _
* I5 n( j8 K; ^
Note: Example of this kind of circuits are:
, M. Q% I3 a- a1 h- output circuits of ballast according to 61347 series& o9 w/ N. H7 S9 a; m! T1 `8 }
- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent
! w. r6 g ?% q! e- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the
8 J, j- H2 c; {9 Krequirements for FELV
8 p9 ~8 M- @3 z& {2 M2 p2 @ ^- circuits supplied by separating controlgear (other than FELV) and isolating controlgear
) N0 \- E$ F, |" B1 Z1 j. C iaccording to IEC 61347-Series+ B9 D3 @0 d: k* T1 U3 S2 c
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