DSH 589 Spray-on insulation system

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DSH 589 ' G8 q; u) W1 q3 j

Spray-on insulation system 3 Z' ~. [, B9 j; m% T4 b- T0 U$ `

General / N% I& N/ `- w0 \

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
" Z  j4 W+ I" ]0 N) Usystem
Key words:
+ ~0 E  \, ~$ ISprayed insulation system
' f* n1 T# k$ d1 V6 jDecision approved by the CTL
during its 43rd meeting in
Johannesburg
9 _  p9 g- }3 C; AQuestion: A manufacturer has presented a new type of insulation (backsheet) for use on PVmodules.
The insulation material (plastic) is sprayed onto the back of the module. After it is hardened, a
) i2 n# C0 ?. bsecond layer is sprayed onto the module. These 2 layers passed all tests of IEC 61730-1 and -2.
Basic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as
  u  n0 E8 T0 {: Z2 a  Y/ einsulation. Spray-on insulation is something like paint but IEC 61730-1 and -2 say nothing against
such an insulation.
Is the use of a spray-on, or similar type of electrical and environmental coating system allowable
* i1 y4 c' |" V. ~: Ufor certification to IEC 61730-1 and IEC 61730-2?
Decision:
Requirements for construction and performance as specified in IEC 61730-1:2004 and IEC 61730-
6 c5 y0 D& r9 M" a  A% K8 j2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic
! P* E7 B% k9 \+ nmodules. 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
discretion of the NCB.