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4.31 Insulation between circuits, X) P/ H* Z& I+ s) k. N4 d
Luminaires incorporating transformers or controlgears providing insulation between circuits and
4 r, o& W3 \' gluminaire using circuits insulated from a LV supply, shall provide suitable insulation between
2 a8 h. L1 ~) O1 ucircuits and between these circuits and the external accessible parts. D* N% v, V: Q' ~. d
The same requirements apply to the circuits connected to the control interface of a controllable* u) ]8 W/ T/ j# }4 _% m# c
luminaire where it is required to maintain the same level of insulation for all components. On
C% }' M+ v: `5 `, Ythe evaluation of the type of circuit to be considered, the information given by the controlgear1 k; |7 ?7 T0 I. E
manufacturer (see 7.1.k of IEC 61347-1) shall be taken into account.' G, n$ F% S- P) x- w/ v
Note: at present on the market the following types of control systems are available:" I4 c5 w7 R, v, J# W8 A$ ^: o. n
- FELV Control signal, basic insulated to LV Supply (e.g. Digital Addressable Lighting Interface and5 g4 V; S& w' d. e
1–10 V DC controls)0 ~ d! r0 V* n) d
- SELV Control signal, (e.g. DMX) |2 j6 v! d- S) R0 {. O6 F
- Control signal, not insulated to LV Supply (e.g. Push button control / phase cut / step dim)$ Y5 N+ v0 S8 \% @4 {8 C
Compliance is checked by the following requirements., w9 Z9 p/ v: n8 L, N
0 I: F6 Z' ~ g4.31.1 SELV circuits/ }7 Q- `! D: M; }
The following sources may be used to supply SELV circuits:
: u! v3 y2 R+ f K9 h! h I- A safety isolating transformer in accordance with IEC 61558-2-6 or equivalent part 2 of
: ?! h! f4 L1 y# A0 p# \61558
" X, m" k0 \) h9 [# _0 i4 S" g- A controlgear providing SELV in accordance with IEC 61347 Series& j; E1 s& F4 ?* `6 x+ s
- An electrochemical source (e.g. a battery) or another source independent of a higher m: \9 N5 K! Y* q9 l2 |9 d7 \' e5 p
voltage circuit$ D" }. k8 v/ }3 `3 W; G
The voltage in the circuits shall not be higher than the limits defined for ELV.
8 s7 {% O* M1 OSELV circuits shall be insulated from the LV supply by double or reinforced insulation (based
0 K% r8 f6 [& F& r" ~) h/ \upon a working voltage equal to LV supply voltage).
8 `3 Q3 c) i# L( Y, Q2 P+ r0 RSELV circuits shall be insulated from other non SELV circuits (excluding FELV) by double or+ q7 e. q4 O4 D8 x# y
reinforced insulation (based upon a working voltage equal to highest voltage in the circuits).! Z9 L( u3 R# @! O& Z7 B* N
SELV circuits shall be insulated from FELV circuits by supplementary insulation (based upon a" b; N7 T* @* r
working voltage equal to LV supply voltage).
6 `; g% z! F6 L, w5 ISELV circuits shall be insulated from other SELV circuits by basic insulation (based upon a* ]' g/ B; L( G) J8 D2 f$ S
working voltage equal to highest voltage in the circuits)
$ p5 V4 J/ N3 Q7 x# A; ^5 ySELV circuits shall be insulated from accessible conductive parts by an insulation according to! l& B! D8 @% m' L
table 1 in Annex X.! M, h# h t9 U; E- M1 Z' N
Note: In case of controlgear according to IEC 61347 series, the SELV voltage to be considered for! B! n; T* @% S9 N/ i) h
insulating purpose in the maximum output voltage indicated on the controlgear as “U-OUT”.
3 q2 W$ s& C6 N# N0 V' v3 Z* iCompliance is checked by inspection and by the test required in clause 8, 10 and 11 of this, }$ \1 }; p* z' P
standard8 h: U, v8 ?" L5 r6 L1 `. O
Plugs and socket-outlets in SELV systems shall comply with the following requirements:- u4 z8 z6 ~' v3 L7 a
- plugs shall not be able to enter socket-outlets of other voltage systems;$ r( y" h8 }8 B2 Y( f5 x
- socket-outlets shall not admit plugs of other voltage systems;
. Z' \( l" @; v& D: K! s- plugs and socket-outlets in SELV systems shall not have a protective conductor0 L& M( ]/ W8 s, A" G$ d/ D
contact.8 `) h% C; c$ U6 n
Compliance is checked by inspection
$ D/ `+ k4 z$ m B3 f1 t8 J+ Q" u
' s. f$ A6 v6 {) Q4.31.2 FELV circuits k% p3 ~7 X( o8 n6 [, I
The following sources may be used to supply FELV circuits:. o; O3 ]) {, V% b% B
- A separating transformer in accordance with IEC 61558-2-1 or equivalent part 2 of
4 a1 u: r8 `% B! V$ I0 G/ i61558
n3 U. I/ o B5 `2 R8 L% W- A separating controlgear providing basic insulation between input and output circuits in
) M3 N1 T# S& W# E' R7 k( {accordance with IEC 61347 Series
7 E5 s y7 s i9 a7 S8 ?9 ]/ k- v- Y- An electrochemical source (e.g. a battery) or another source in circuit separated by the0 }/ T6 G; v1 S0 ~' n
LV supply by basic insulation only.
1 c3 Y: C3 k' A) R6 M" c+ LThe voltage in the circuits shall not be higher than the limits defined for ELV.
2 k" E. e& |8 o% S- t2 L Q7 NFELV circuits shall be insulated from the LV supply by at least basic insulation (based upon a% w, C" y. C" o7 P' |
working voltage equal to LV supply voltage).+ q! h/ t/ F+ C" ^/ u; X3 M" c
It is not required that FELV circuits shall be insulated from protective earth circuit except for) f) Z8 Q4 q) ~1 Y0 b G+ F5 M
functional purpose.6 [. B0 F$ Y; H! G8 N9 \$ T
FELV circuits shall be insulated from by an insulation according to table 1 in annex X.
- v9 _& |+ W- J8 Q/ {- z: n# bCompliance is checked by inspection and by the tests required in Sections 8, 10 and 11 of this0 A2 b- z% r% K6 i
standard* f) w1 |$ V' B0 k/ B/ W, q w
Plugs and socket-outlets for FELV systems shall comply with the following requirements:; f1 N/ K& q( f# q. E ~$ b
- plugs shall not be able to enter socket-outlets of other voltage systems;2 T" {1 w1 f6 `4 j7 F+ d/ V
- socket-outlets shall not admit plugs of other voltage systems;
! M/ b p, ?" L0 S- socket-outlets shall have a protective conductor contact./ k2 n' d1 @1 C
Compliance is checked by inspection D* Q0 }; N$ B0 m
* V [* G- l; h* M; i# r- o4.31.3 Other circuits:
: W1 D9 g0 ^# ^4 p1 cThe insulation between circuits other than SELV or FELV and accessible conductive parts shall
# u* V! c; K/ f3 T4 [8 G# Abe in accordance with the requirements in table 1 in annex X.- S4 K* g& y: ] h) y3 H
In class II construction, where equipotential bonding is used for the protection against indirect5 J. h/ W5 J/ q# j& l6 C
contacts with live parts (see table 1 in Annex X), the following requirements are applicable:
/ y$ R' `' e- ]! @, A3 q6 V- All conductive parts are connected together so that two failures of the insulation result! N6 q- D: _" S; A$ [# H+ Z
in a short circuit
$ R/ F2 K6 X6 |, P7 _- To check whether the conductive parts are reliably connected together, the test in
+ ~% W; C* C8 I0 A1 f: v2 T0 b7.2.3 (earth continuity test with 10 A) have to be carried out
# S" V5 `, V L+ r- the conductive parts comply with the requirements of annex A of this standard in case
5 R* c3 A/ N9 ]! H/ h3 k9 Hof insulation fault between live parts and accessible conductive parts.) y7 l- L+ y3 x/ ~/ n
- For master/ slave applications (the control gear is mounted in the master luminaire and u; A, u2 l6 U. j9 q8 a! Z1 x. h
supplies the slave luminaires) an equipotential bonding between the luminaires shall be! }5 ~7 U8 h4 O) C, S' c
used to prevent dangerous voltages between accessible luminaires. For this reason
5 L$ G, u8 B% o& S/ {' k- tmaster luminaire shall be provided with a terminal to connect accessible conductive
! r: q# Y0 R: i5 Nparts of the slave luminaires and the slave luminaire shall be constructed as class I* i+ e( t z! W
luminaires.+ f% v b. c" B) V) E: E
Compliance is checked by applying the requirements of this standard to check to the insulation
% ]! S, x/ Z" v& Q2 Orequired in Annex X
$ e% S' m; S9 L9 t+ W: X& W# H# n7 m' c2 a
Note: Example of this kind of circuits are:
# Z! L9 K! ^: c6 b8 j; e- output circuits of ballast according to 61347 series
; `4 a. F4 u- t* I2 m E4 ^- circuits supplied by isolating transformer according to IEC 61558-2-4 or equivalent
7 W6 S% _3 ^4 g; R2 I( W- circuits supplied by separating transformers according to IEC 61558-2-1 which do not fulfil the# _! o% |* P+ ~
requirements for FELV
- K6 [9 B0 b9 N/ V5 Y* h& s) l- circuits supplied by separating controlgear (other than FELV) and isolating controlgear s* t. K$ M, i" U; X u4 [% Y! t+ O
according to IEC 61347-Series' y3 E' \1 \# `- e: A* \
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