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发表于 2012-9-28 09:22
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4.31 Insulation between circuits
: D1 y: z) o7 e8 H4 j% oLuminaires incorporating transformers or controlgears providing insulation between circuits and
' {5 a- Q1 N6 k( A) Xluminaire using circuits insulated from a LV supply, shall provide suitable insulation between( w5 D9 v. x$ ?' e- `- T
circuits and between these circuits and the external accessible parts.
1 y2 K" g: Z7 C2 pThe same requirements apply to the circuits connected to the control interface of a controllable
% Y0 X; Q" J# C" L* |' l4 n) ]luminaire where it is required to maintain the same level of insulation for all components. On
7 `" l6 |' s. Xthe evaluation of the type of circuit to be considered, the information given by the controlgear
( v6 \7 [. B# W6 P' P; a' i+ A% L6 Lmanufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.
$ n4 d6 B8 r5 Y0 K! r: J/ B2 j; ONote: at present on the market the following types of control systems are available:8 A# ]* R: E5 L+ h
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and4 A8 X% ]6 k2 P. V
1–10 V DC controls)0 B6 D9 q' p) O
- SELV Control signal, (e.g. DMX)2 B* V j3 Y$ D4 Q( A# \8 V- i: ~3 V a
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
5 p' ^ I% O2 D7 S' y6 s- MCompliance is checked by the following requirements.$ C& q0 A4 A, ~, l1 b7 r% s
- r8 K! B! k; n: C. w/ r% ]
4.31.1 SELV circuits) }# v; f) |' c h' Z
The following sources may be used to supply SELV circuits:9 n6 }) U4 B* o4 F' g
- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of) w# t9 D# @* h: h
61558. e, O1 {% ?+ @5 b I6 `* S2 ]
- A controlgear providing SELV in accordance with IEC 61347 Series: F9 Y- d' r) Z* A) A, |
- An electrochemical source (e.g. a battery) or another source independent of a higher6 y& g* L' w5 ]
voltage circuit
, w' e y+ ]. Z& v A( aThe voltage in the circuits shall not be higher than the limits defined for ELV.
& C" T* h0 \3 z; [8 fSELV circuits shall be insulated from the LV supply by double or reinforced insulation (based1 I' C: G' R$ U9 z" J
upon a working voltage equal to LV supply voltage).
) [7 K) w) r' U) }4 d" USELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or7 q5 T" d( T* v d8 h. @' |
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).# F& r8 O" x; T3 I3 v: q/ o
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a
0 @+ S1 w5 e' m! y; [5 z- ]/ Kworking voltage equal to LV supply voltage).
/ s. [! V5 z5 L! MSELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a, B" t( C6 \7 i$ W( B @/ F( I ]
working voltage equal to highest voltage in the circuits)& T$ W4 k& K9 s: ~8 \1 e0 S6 a
SELV circuits shall be insulated from accessible conductive parts by an insulation according to
: Z. F' V: ~/ w2 L1 btable 1 in Annex X.3 k& E$ a6 j5 v/ _( D1 Z
Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
8 L* M% u, l% [9 ?insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
$ d: H+ i2 Z! \+ f6 N$ i! F2 r/ OCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this7 S3 m D0 n! c; [$ N& H2 z
standard
; [5 p! g0 j2 F: V0 nPlugs and socket-outlets in SELV systems shall comply with the following requirements:% \2 V. t5 z1 k) K `
- plugs shall not be able to enter socket-outlets of other voltage systems;( h4 a8 O! Z# n( [. f4 X
- socket-outlets shall not admit plugs of other voltage systems;$ m* i" L3 B; H9 \
- plugs and socket-outlets in SELV systems shall not have a protective conductor
; @) ^9 Y0 o2 n6 K, D* ycontact.
/ M8 x9 I# m) U* A R" L% r$ MCompliance is checked by inspection
; |! m8 _2 l# s4 ?" D. E0 R
( c! c. s$ u) U7 Z3 t3 j4.31.2 FELV circuits
: J0 u' A: b; u2 rThe following sources may be used to supply FELV circuits:5 X# i' c |! O) g7 s
- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
8 B9 f4 ?9 L% v) U6 ~615586 K5 L5 J5 Y( z6 I3 ]
- A separating controlgear providing basic insulation between input and output circuits in5 j9 \+ M; K2 {# Q' M. O/ U
accordance with IEC 61347 Series
) G' c: `5 [7 {. X' f8 i- An electrochemical source (e.g. a battery) or another source in circuit separated by the4 ^7 Z( e! o5 ]7 Q h7 N% E
LV supply by basic insulation only.
* e6 }7 ]3 o/ p7 M, }1 UThe voltage in the circuits shall not be higher than the limits defined for ELV.1 @* G/ o2 \1 I" N
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a
# s- ?0 O- R0 h. ?working voltage equal to LV supply voltage).7 U4 t/ z8 E0 `
It is not required that FELV circuits shall be insulated from protective earth circuit except for' s# C% Y: |" [$ e2 ^! X8 V
functional purpose.2 V5 k1 T3 ^3 o2 S, B4 @( Z& L
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.
7 N) d0 {! `; a; h2 wCompliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this! ^7 p" D2 n0 D, L
standard
* i/ p& E2 m) QPlugs and socket-outlets for FELV systems shall comply with the following requirements:4 x+ I6 L& A, J% J% c
- plugs shall not be able to enter socket-outlets of other voltage systems;. T) m8 j- `# E: i! V* H
- socket-outlets shall not admit plugs of other voltage systems;7 s. `2 c- j* S/ q8 A7 ?- R d
- socket-outlets shall have a protective conductor contact.2 [% o0 B# C- w, k: F
Compliance is checked by inspection" x0 V @7 I( \# j
! Y) {) e% Z6 k0 R8 X4.31.3 Other circuits:
/ D+ ^: y% T4 CThe insulation between circuits other than SELV or FELV and accessible conductive parts shall0 P) P9 M- V+ Y7 F3 g
be in accordance with the requirements in table 1 in annex X.
9 u2 u4 p& h& T1 N! O" B) i0 NIn class II construction, where equipotential bonding is used for the protection against indirect8 |8 D* ?7 w! ~5 T5 c. _6 p
contacts with live parts (see table 1 in Annex X), the following requirements are applicable:" v3 ~! _$ f! U6 Z
- All conductive parts are connected together so that two failures of the insulation result" m7 L& d, @8 ^, g" k+ S T* B8 ^
in a short circuit& J! P2 N" z! y2 l
- To check whether the conductive parts are reliably connected together, the test in
1 y9 J: T; \% T' X# d; X. m7.2.3 (earth continuity test with 10 A) have to be carried out9 p, q/ ~: P" H3 \ c8 |. o. ^
- the conductive parts comply with the requirements of annex A of this standard in case, o+ s" I2 C9 v6 s
of insulation fault between live parts and accessible conductive parts.% B3 o5 V7 B. Z' P$ B5 Y `
- For master/ slave applications (the control gear is mounted in the master luminaire and
# s& S6 k6 \' Isupplies the slave luminaires) an equipotential bonding between the luminaires shall be
* h, d2 W# p. [: l* W* u2 c7 B( Dused to prevent dangerous voltages between accessible luminaires. For this reason! E6 z- H" {. s
master luminaire shall be provided with a terminal to connect accessible conductive
- Q x. f M7 t# X8 M$ N+ j& Eparts of the slave luminaires and the slave luminaire shall be constructed as class I0 ]: U/ }5 D+ c! d
luminaires., k5 W4 }" G5 d2 O& f/ h
Compliance is checked by applying the requirements of this standard to check to the insulation3 n$ m9 r* h: V4 X$ L. |9 F4 V
required in Annex X8 z7 O. Q! a# K9 t
. t9 V$ ]! V/ W4 d h7 ?
Note: Example of this kind of circuits are:
' ? L S* @! q( t' W- output circuits of ballast according to 61347 series: f$ f# F3 H9 K' ?, v& j
- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent
/ R) {6 X3 R7 {* Q( [+ I- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the3 ^# `1 C, l$ [: k$ ^( M, i) g
requirements for FELV
0 x# M A) v& b& Q, r9 I6 s( q- circuits supplied by separating controlgear (other than FELV) and isolating controlgear! w( ~5 x( D5 a+ ~
according to IEC 61347-Series
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