61730-1(ed.1) & 61730-2(ed.1) 7 R- o; H& X2 h5 b( Y5 ^7 Q: U/ F x
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Standard(s)- IEC 61730-1, -2 Sub clause(s): DSH No 5890 A: y5 s# [- z# {
Page: 1(1)) g3 w/ v. h* u5 k
Subject: Spray-on insulation$ N# |, V0 _" E3 x6 Z5 B
system: R$ M: t! X0 h( o& L [8 t4 p
Key words:# }0 q, {+ C1 e4 K' q. R
Sprayed insulation system % S" ~6 C# B: |( p1 K7 MDecision approved by the CTL ' m6 R& j4 Y/ @' [2 ~during its 43rd meeting in 5 _$ Q0 A* X0 g! K4 D+ U: I3 bJohannesburg # _, T4 c/ U3 r" hQuestion: A manufacturer has presented a new type of insulation (backsheet) for use on PVmodules., e7 }8 V! C8 q( u; p6 S9 t
The insulation material (plastic) is sprayed onto the back of the module. After it is hardened, a # p( m( ~" _* L/ ^3 z0 j/ ~4 zsecond layer is sprayed onto the module. These 2 layers passed all tests of IEC 61730-1 and -2.4 _& z3 a6 Z6 K8 K
Basic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as- d4 A+ S' |) S1 ^. M
insulation. Spray-on insulation is something like paint but IEC 61730-1 and -2 say nothing against . N- i( ?+ n9 i2 Osuch an insulation.6 u+ B1 U9 h8 G5 K. J3 j
Is the use of a spray-on, or similar type of electrical and environmental coating system allowable4 a) Q5 K4 X9 G, L$ L2 F7 E7 q3 A
for certification to IEC 61730-1 and IEC 61730-2?6 {0 v# [' b( j0 g
Decision:4 R: A$ n* J" A- H) S7 ?. `& _
Requirements for construction and performance as specified in IEC 61730-1:2004 and IEC 61730- ) { ^6 C; W Q g i" W2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic% _9 A) Z/ u$ d
modules. Although these standards provide suitable rationale for evaluating the construction and y0 d9 |! G, Q2 G9 r5 [; _4 a
performance of the samples obtained by the CBTL, the issue of certification remains at the$ N: N7 Z8 _- i3 P- z ~
discretion of the NCB. 0 `7 B% o( J d, r8 x9 H% T! Z[attach]77230[/attach]/ F' ^0 ~ t. W- i, U5 X& u2 l
DSH 589