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发表于 2012-9-28 09:22
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4.31 Insulation between circuits
$ c8 [2 C% E. j- dLuminaires incorporating transformers or controlgears providing insulation between circuits and- Y# K; r# w+ Z' j
luminaire using circuits insulated from a LV supply, shall provide suitable insulation between
' C( |7 e, A% g( xcircuits and between these circuits and the external accessible parts.* ?0 Y( r, Q$ y$ ?, |
The same requirements apply to the circuits connected to the control interface of a controllable
/ J! M+ L& B+ S) T2 b" wluminaire where it is required to maintain the same level of insulation for all components. On
0 S0 v/ j4 U9 ^7 r# x: b0 ythe evaluation of the type of circuit to be considered, the information given by the controlgear
" W+ {" ^7 X" G, i0 M! O# D$ gmanufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.
+ y) T- S* V! y' a3 VNote: at present on the market the following types of control systems are available:
5 p$ p S5 `5 _5 Z5 r- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and' Z" t- G3 K" @/ h, J& @2 W. G' e- y
1–10 V DC controls)% k2 T" ]1 N+ i/ h
- SELV Control signal, (e.g. DMX)' D" f* @& G: [! j) t6 S8 k
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)
" y" D8 E4 H- L( @7 |7 bCompliance is checked by the following requirements., F+ x, l' B+ G7 C; U
+ J* Q& i4 \ f, F: z4.31.1 SELV circuits x, `; @' b; K W2 j/ R
The following sources may be used to supply SELV circuits:
2 G. J8 R' e W% r0 j- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of
$ G, h6 Q7 V& ^4 M- T' _; d/ U: q; b61558
0 V, q2 s7 G o: H. k. `3 ^2 A- A controlgear providing SELV in accordance with IEC 61347 Series
) T. _. C1 N# w- An electrochemical source (e.g. a battery) or another source independent of a higher; p7 f+ Q) D; g1 c8 J" j+ O
voltage circuit
- O x: y0 {1 \3 [5 @$ ^The voltage in the circuits shall not be higher than the limits defined for ELV.
5 j, m/ B. i$ J! \8 ISELV circuits shall be insulated from the LV supply by double or reinforced insulation (based
) E8 |8 q. D$ ^! ]4 O# A" Lupon a working voltage equal to LV supply voltage)." ? v% h1 I' z( A
SELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or+ [8 P& n6 O: C3 Y! Z
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).8 `) N( ^+ C2 p. p; v5 B' e
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a2 `- B' h1 D3 b" H- O
working voltage equal to LV supply voltage).! H4 a9 M2 M3 f7 V" `7 Q! X& W( M
SELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a
7 y) k6 |5 B1 E1 k) Zworking voltage equal to highest voltage in the circuits) j4 s- R; K" @$ C4 j
SELV circuits shall be insulated from accessible conductive parts by an insulation according to% T; W0 g; q9 R6 `8 |. L
table 1 in Annex X.' Z- S/ H _8 x: ]9 E
Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for
6 ~ }; A( y qinsulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
$ [( S4 T. u4 p6 a" HCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this
A/ O$ x9 ? T! Jstandard
# c! }* G) t9 H! DPlugs and socket-outlets in SELV systems shall comply with the following requirements:
R' e4 ?' R% y! a. x3 [- plugs shall not be able to enter socket-outlets of other voltage systems;* F' a* K5 p+ N8 u9 |
- socket-outlets shall not admit plugs of other voltage systems;# S8 A- C+ O7 d, f, b5 w
- plugs and socket-outlets in SELV systems shall not have a protective conductor
/ o1 B: H: v6 b7 {1 Xcontact.
* N6 S3 a2 M @! fCompliance is checked by inspection
1 i% Q0 Y e4 _5 L* }* T' X, y+ Z" S2 H. x7 Q7 W; b D$ K
4.31.2 FELV circuits
4 a; e+ o M$ xThe following sources may be used to supply FELV circuits:
, {- C; ]- u$ \- Y$ n% }/ i% w' }- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
. t8 D5 `5 y5 }) l+ T61558. ^- E/ @# c i8 t, z1 J- S l
- A separating controlgear providing basic insulation between input and output circuits in
; X+ ^1 Y, L u9 t6 m1 }: raccordance with IEC 61347 Series
, X, Y( H: m6 V& ^3 M- An electrochemical source (e.g. a battery) or another source in circuit separated by the4 ?5 }6 `4 k, ~. o5 W1 l5 r; v
LV supply by basic insulation only.7 i, @! }5 m w5 A L0 P; I* n
The voltage in the circuits shall not be higher than the limits defined for ELV.3 V, M3 f; }* j* k
FELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a
2 S: D: {6 V- \6 s4 W1 Oworking voltage equal to LV supply voltage).9 e1 d; @) |" K% h& \
It is not required that FELV circuits shall be insulated from protective earth circuit except for
# {5 G; T6 j3 [0 d! Kfunctional purpose.
: Q9 T0 s7 A* ]; Q9 T2 Z, AFELV circuits shall be insulated from by an insulation according to table 1 in annex X.! s# n( v" W3 N. G' U
Compliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this
( k) b" O# X5 S+ Ystandard9 ?% S7 j2 I3 c: j. A* N
Plugs and socket-outlets for FELV systems shall comply with the following requirements:
1 @: q$ b6 D) c: Z- plugs shall not be able to enter socket-outlets of other voltage systems;
# p/ k; @: ~9 |3 i1 \- socket-outlets shall not admit plugs of other voltage systems;
, c5 U( l9 O- U) Q7 `& s* P- socket-outlets shall have a protective conductor contact.7 k* a' z1 W3 k2 M: ~' i
Compliance is checked by inspection: U0 p. a, x7 Y* ^7 ?+ V- Y
: x/ [- c/ z1 S- Y5 j
4.31.3 Other circuits:' T( g4 a% ~0 P5 m, `" J* V4 }: h/ _
The insulation between circuits other than SELV or FELV and accessible conductive parts shall/ o7 j/ t; W1 f" X: b- D4 `
be in accordance with the requirements in table 1 in annex X.
' t% M5 v8 o1 \ G0 PIn class II construction, where equipotential bonding is used for the protection against indirect/ E2 u% M: d- C
contacts with live parts (see table 1 in Annex X), the following requirements are applicable:
v' w h# o+ E/ \6 E1 H/ j/ x- All conductive parts are connected together so that two failures of the insulation result- V1 [, ~! a3 S
in a short circuit
& E6 ?; i6 S T# V% [- To check whether the conductive parts are reliably connected together, the test in
w1 m( ^$ W: Z9 V# ^7.2.3 (earth continuity test with 10 A) have to be carried out4 R! ^3 Z. F5 N
- the conductive parts comply with the requirements of annex A of this standard in case
! C/ }. Q3 Y, c" J1 c; c4 Vof insulation fault between live parts and accessible conductive parts.
1 n! H- v/ Y1 N) ^- For master/ slave applications (the control gear is mounted in the master luminaire and
! @/ I8 t1 v% G0 \ y) w6 xsupplies the slave luminaires) an equipotential bonding between the luminaires shall be
, i2 H2 e" c) w' qused to prevent dangerous voltages between accessible luminaires. For this reason
; ~5 L- d! V4 g1 V" P- T" z8 o$ Hmaster luminaire shall be provided with a terminal to connect accessible conductive
* _- t" y! q% Z0 U3 Bparts of the slave luminaires and the slave luminaire shall be constructed as class I0 p' p$ a* s# z! u3 {* W) p2 B
luminaires.
) `; R( C. s1 ^( n+ ~! `Compliance is checked by applying the requirements of this standard to check to the insulation# q% c/ d! q0 o1 h+ z. h7 B+ h
required in Annex X
4 p2 F. z# E# d7 L F7 K+ w& y9 Y/ @. D
Note: Example of this kind of circuits are:
q* R2 k7 i3 E1 Q, V7 G- output circuits of ballast according to 61347 series, B5 m$ \" y9 {4 Z1 }
- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent8 t1 {5 G) f6 d( s
- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the
# w4 c5 Z. K# ~$ j. C9 g Prequirements for FELV
& W! D7 N) J, N8 r P- R- circuits supplied by separating controlgear (other than FELV) and isolating controlgear) \! o# b$ r4 h0 X& H3 v
according to IEC 61347-Series( W2 o, s$ o W( m' K0 V
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