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发表于 2012-9-28 09:22
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4.31 Insulation between circuits- x! T5 j1 {8 R
Luminaires incorporating transformers or controlgears providing insulation between circuits and
3 ?* ^* W0 l2 D, d8 Q9 Qluminaire using circuits insulated from a LV supply, shall provide suitable insulation between- A% P. W) u0 t! x$ o- ^
circuits and between these circuits and the external accessible parts./ n( {1 q1 i( l1 o1 K
The same requirements apply to the circuits connected to the control interface of a controllable
& K$ i: e9 y6 |+ K( d9 kluminaire where it is required to maintain the same level of insulation for all components. On* C- s3 B$ K) v
the evaluation of the type of circuit to be considered, the information given by the controlgear
& x# L( ], c ?manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.8 }! z% L; E7 ?; s
Note: at present on the market the following types of control systems are available:, d0 ~5 g) A' A; F' n
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and% l$ ?9 P5 I9 H! u2 I
1–10 V DC controls)
5 F. k- q9 k6 c- SELV Control signal, (e.g. DMX)
J8 d7 Q6 i8 O8 L6 R$ _0 O- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
: C: G: r/ [& f1 {9 qCompliance is checked by the following requirements.
- v9 H/ W2 D$ w( L4 m3 T' B2 l5 z' U' n; \) d1 h8 E5 ^: q
4.31.1 SELV circuits
3 M2 R+ ^) Q2 s3 |2 E) _* ^The following sources may be used to supply SELV circuits:
. E8 S7 T# F4 M- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of, @/ E1 h0 ~8 f4 n' c
61558
: z% i& [, x) I6 {: z; E. c" S# H0 m- A controlgear providing SELV in accordance with IEC 61347 Series: }* p% F$ Y6 D6 ]/ v- C6 n
- An electrochemical source (e.g. a battery) or another source independent of a higher
4 L: L6 ^7 m5 b% R8 g1 w7 G5 W. Wvoltage circuit! r7 @* E" I4 j# _1 V
The voltage in the circuits shall not be higher than the limits defined for ELV.
) j; F6 g; I* t |SELV circuits shall be insulated from the LV supply by double or reinforced insulation (based1 b+ M. Z* X5 }. [6 a
upon a working voltage equal to LV supply voltage).
2 h. Z. ^: M) a7 q! ~* P9 HSELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or
1 B' F& U" A! T' X- i& _* ^reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).9 A* c; `9 g# [% N" B) U" i6 m. M
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a
* r; j5 p U" X; s6 r: Y! oworking voltage equal to LV supply voltage).. M# b$ P( c7 B
SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a
* ^: t; M+ z7 V! x; Z8 O3 s/ I- Sworking voltage equal to highest voltage in the circuits)
+ g8 {1 ~) p% X& e1 C; ~" TSELV circuits shall be insulated from accessible conductive parts by an insulation according to$ O5 l* V2 R8 c6 A& {3 i
table 1 in Annex X.
& J' g5 q3 Y, j* G' bNote: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for5 ^8 o$ j; f" {0 P' m+ {$ m+ y" ~
insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.9 p2 y* G+ T* d+ s1 p1 P2 D
Compliance is checked by inspection and by the test required in clause 8, 10 and 11 of this) f+ A: h: t4 X
standard( o3 ?% r. O. |
Plugs and socket-outlets in SELV systems shall comply with the following requirements:! `. t# B6 j. R- E& M; N; z8 Q, }
- plugs shall not be able to enter socket-outlets of other voltage systems;
4 @7 o3 p# b7 F/ E: }9 E- t: j- socket-outlets shall not admit plugs of other voltage systems;2 ?2 y; ]3 g- h( t0 m! f
- plugs and socket-outlets in SELV systems shall not have a protective conductor
6 ^) q5 h) o& A% y7 J$ D% ?contact." I- R- [& u( s' U9 N
Compliance is checked by inspection
/ m3 T* h9 T0 j) S* ^
* ^ R I/ W N4 ^5 v4.31.2 FELV circuits5 o" Q3 I0 h* ]3 y7 E. B
The following sources may be used to supply FELV circuits:
. y0 q3 w. {+ t, I# b- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
% A+ F( `/ s p: u61558; r L k# b3 d) R3 G: c& N- T
- A separating controlgear providing basic insulation between input and output circuits in
9 q) {' n1 z* l1 taccordance with IEC 61347 Series, s6 I7 p9 F7 I3 W
- An electrochemical source (e.g. a battery) or another source in circuit separated by the0 [5 @6 Q/ i% `, e( i$ |& `
LV supply by basic insulation only.
; P+ z4 ^7 ]0 O& ~The voltage in the circuits shall not be higher than the limits defined for ELV./ |; O A. @% P W! ]5 t3 z
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a1 X# g. H( U. y2 s
working voltage equal to LV supply voltage).5 u$ g2 B/ C4 j1 H$ e, a7 L+ r0 |& p! q
It is not required that FELV circuits shall be insulated from protective earth circuit except for! i* Q$ |. z2 ~* W* G% ~9 @% p
functional purpose." z4 i: R m( @1 O0 D
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.
/ J8 a# u( B$ VCompliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this! J( |. V- m# D! a
standard
6 ^5 ?7 m8 {6 FPlugs and socket-outlets for FELV systems shall comply with the following requirements:' A4 B1 ]$ f! q$ `6 c
- plugs shall not be able to enter socket-outlets of other voltage systems;
. W# F3 x9 D0 S/ i9 ^: h- socket-outlets shall not admit plugs of other voltage systems;- c7 S5 j7 z& D+ g8 t' W! ^" l" R
- socket-outlets shall have a protective conductor contact.
9 t3 m: g/ k0 b* M2 Q6 vCompliance is checked by inspection1 u( @3 d! z# \$ u5 u
# i' J | S. |/ @8 A+ }4.31.3 Other circuits:
5 @" j3 T4 _, n9 s8 @" l: NThe insulation between circuits other than SELV or FELV and accessible conductive parts shall
! ], \$ w4 e8 |be in accordance with the requirements in table 1 in annex X.) {: H: Z0 m0 z$ h/ O+ h" o: S
In class II construction, where equipotential bonding is used for the protection against indirect
0 [0 P! P+ [$ y( S$ S5 {$ Y% @- L6 Acontacts with live parts (see table 1 in Annex X), the following requirements are applicable:
4 b/ q- z; Q" B% [* \- All conductive parts are connected together so that two failures of the insulation result, d2 R: G: a3 U; T6 N: _4 i
in a short circuit
5 x$ D: m) R) X' I1 d- To check whether the conductive parts are reliably connected together, the test in: G; |6 b! E- t5 u. w4 c
7.2.3 (earth continuity test with 10 A) have to be carried out. e( D. n" C- R- b
- the conductive parts comply with the requirements of annex A of this standard in case
/ r, I m5 E3 \) }7 Zof insulation fault between live parts and accessible conductive parts.' \+ T! |3 L9 a0 d" u
- For master/ slave applications (the control gear is mounted in the master luminaire and
/ n0 t, E& E6 ^! r/ Rsupplies the slave luminaires) an equipotential bonding between the luminaires shall be; Z1 |. ]; e* O/ }3 X' |
used to prevent dangerous voltages between accessible luminaires. For this reason
4 s5 |" M3 c' B- umaster luminaire shall be provided with a terminal to connect accessible conductive
7 V! p5 O2 i% U$ _% {parts of the slave luminaires and the slave luminaire shall be constructed as class I. g ~+ ]6 `! y# u2 @
luminaires.
% N0 @9 e5 A+ J( K+ KCompliance is checked by applying the requirements of this standard to check to the insulation: Y& u% h: D0 A6 Y2 l& N& N
required in Annex X
9 N @ G" E7 m6 x: ~8 x: U1 H l9 f, U8 r" D* l) _& s) M: i0 h% n, J
Note: Example of this kind of circuits are:
% [: I! M9 o% q- z/ e- output circuits of ballast according to 61347 series
4 ?+ y. }/ B) u$ w- A! C' M9 Q0 y- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent
* \! a4 \# r" u- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the+ H, d" j9 l$ r( x
requirements for FELV
/ N+ E8 h8 F, a! m2 I8 C' }" k- circuits supplied by separating controlgear (other than FELV) and isolating controlgear
* c( @9 J! u! [9 _$ yaccording to IEC 61347-Series
! v- [5 x9 a8 u# v# d |
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