DSH 589 Spray-on insulation system

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DSH 589 1 E1 U: H9 I3 a/ R0 T' o8 [ / \7 t2 }$ I, u: U

Spray-on insulation system ; R& D: E4 [/ K  z) x, ?

General $ k+ a; r6 e0 p& H6 j1 \' i

61730-1(ed.1) & 61730-2(ed.1)

Standard(s)- IEC 61730-1, -2 Sub clause(s): DSH No 589
Page: 1(1)
Subject: Spray-on insulation
1 I( T; |( u8 L7 ]; tsystem
Key words:
7 W6 i' a& ]1 X5 BSprayed insulation system
) X9 y; \5 v5 ~+ A, w, WDecision approved by the CTL
! W" t6 w4 E4 S# bduring its 43rd meeting in
6 L1 H$ s0 s1 B. @Johannesburg
Question: A manufacturer has presented a new type of insulation (backsheet) for use on PVmodules.
+ D% N; [0 v! C- CThe insulation material (plastic) is sprayed onto the back of the module. After it is hardened, a
second layer is sprayed onto the module. These 2 layers passed all tests of IEC 61730-1 and -2.
0 g  G/ Q9 P+ e& n7 p& @Basic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as
( B) d: Z& w  i9 t' A) s  hinsulation. Spray-on insulation is something like paint but IEC 61730-1 and -2 say nothing against
such an insulation.
/ t/ b' i- s" L7 N; D7 HIs the use of a spray-on, or similar type of electrical and environmental coating system allowable
3 k1 y' a: Q; s% W# hfor certification to IEC 61730-1 and IEC 61730-2?
Decision:
& s/ R% P' `- E2 zRequirements for construction and performance as specified in IEC 61730-1:2004 and IEC 61730-
. z6 e# B2 `' G0 G7 F5 x" v& t" H# B2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic
modules. Although these standards provide suitable rationale for evaluating the construction and
performance of the samples obtained by the CBTL, the issue of certification remains at the
; Y; ^# ]) P6 A  ^; L+ v+ n  jdiscretion of the NCB.

" L  K# z0 l" ~' M+ T! s