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| DSH 5890 X7 a, W) G$ f/ {* D; I$ i& W
: b( o& J) {5 q% w' { | Spray-on insulation system7 G; _; X6 ~( n' T, D1 I0 S- g* Z
| General$ F) j& }& S+ O, T
| 61730-1(ed.1) & 61730-2(ed.1)
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Standard(s)- IEC 61730-1, -2 Sub clause(s): DSH No 589
0 u7 E ]9 S- sPage: 1(1)
- V9 R3 u+ w( w. eSubject: Spray-on insulation
4 z* q! b0 N% s5 h8 I" ]6 v& `system
3 Y1 v( j) P" WKey words:( {+ c/ q0 A$ f6 h# V
Sprayed insulation system
# u9 Q! N1 e2 C# a( |/ y0 ?Decision approved by the CTL
1 e5 W+ {0 h$ N+ x; aduring its 43rd meeting in
& f+ j; D" f( ^8 |6 j" O5 qJohannesburg* d$ m( V( R1 E x" y R4 `
Question: A manufacturer has presented a new type of insulation (backsheet) for use on PVmodules.* i! L' o0 v2 z
The insulation material (plastic) is sprayed onto the back of the module. After it is hardened, a" H7 x H. b" G
second layer is sprayed onto the module. These 2 layers passed all tests of IEC 61730-1 and -2.
) y) ^/ [2 y$ sBasic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as
" i% S, j+ q4 T M/ g0 n4 k7 b$ Vinsulation. Spray-on insulation is something like paint but IEC 61730-1 and -2 say nothing against4 `$ s2 l' @- D: g, S4 s# K
such an insulation.
; t2 i+ O- N' x m2 C& [- @& _. Y8 AIs the use of a spray-on, or similar type of electrical and environmental coating system allowable" r# _5 F. L0 f p( e- H- O9 Q
for certification to IEC 61730-1 and IEC 61730-2?. Q% O) _6 Y8 _% Y+ {
Decision:
& y6 K+ K2 ?4 ]3 }% eRequirements for construction and performance as specified in IEC 61730-1:2004 and IEC 61730-
! F4 t; z4 e! S o' z/ q+ p2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic) G: o, V1 d4 i/ k# Q+ \2 t
modules. Although these standards provide suitable rationale for evaluating the construction and5 m- ]& c: B! w ]( q
performance of the samples obtained by the CBTL, the issue of certification remains at the! b7 U: x/ N: g- M0 l# R3 i9 r
discretion of the NCB.6 S1 E+ T6 M' |' _4 c, p
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