DSH 589 Spray-on insulation system

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DSH 589 " b) I( v, o0 b+ s% d( K% Z/ t: _

Spray-on insulation system 4 r2 U, K8 J! ~3 ]6 y! g

General 2 e; x$ y3 y. ~4 Z7 ?2 V) y

61730-1(ed.1) & 61730-2(ed.1) ) x% s+ H4 P+ |4 K+ p. ?. A

  P4 b4 l' O0 u8 i0 B( tStandard(s)- IEC 61730-1, -2 Sub clause(s): DSH No 589
Page: 1(1)
Subject: Spray-on insulation
  p/ f" s7 l: s" ^6 Bsystem
7 d/ t- t4 W1 ?9 H. SKey words:
Sprayed insulation system
7 g& F- c' K% O4 hDecision approved by the CTL
during its 43rd meeting in
Johannesburg
1 D: X8 ~, h, j5 l3 b5 N3 hQuestion: A manufacturer has presented a new type of insulation (backsheet) for use on PVmodules.
+ D& _; [' {1 r2 KThe 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.
8 j, U; A8 N2 `$ s& @Basic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as
2 Y( n. @$ A2 M* R9 H7 M' G" ainsulation. Spray-on insulation is something like paint but IEC 61730-1 and -2 say nothing against
( f7 @; y+ E* F! S8 h9 csuch an insulation.
) n/ X0 r9 N* w! d9 HIs the use of a spray-on, or similar type of electrical and environmental coating system allowable
: J% a: W# u) D2 `  w9 Wfor 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-
1 u6 h1 s( B; J2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic
modules. Although these standards provide suitable rationale for evaluating the construction and
6 T9 A: ~" J7 H+ ~# I  Jperformance of the samples obtained by the CBTL, the issue of certification remains at the
discretion of the NCB.