DSH 589 Spray-on insulation system

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DSH 589 ' L* r4 Y* ]: c : v3 Y6 t! Y. `! c+ `

Spray-on insulation system

General ' H5 J$ W+ N  ~

61730-1(ed.1) & 61730-2(ed.1) ) C. K2 |8 p" t6 S; ]

3 n. L1 z% w5 l2 yStandard(s)- IEC 61730-1, -2 Sub clause(s): DSH No 589
& E  L) O% `# ^6 G( w* S4 |. X" [Page: 1(1)
Subject: Spray-on insulation
system
Key words:
4 K3 S- T- `) XSprayed insulation system
# I& B5 |+ i+ k" R  Q4 L9 W; pDecision approved by the CTL
during its 43rd meeting in
Johannesburg
Question: 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
9 m* N" l1 ^8 ]! _9 P) |second layer is sprayed onto the module. These 2 layers passed all tests of IEC 61730-1 and -2.
5 o& i- h; _3 p2 S) E" hBasic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as
; V; _, _. S0 S# z: hinsulation. 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
for certification to IEC 61730-1 and IEC 61730-2?
# f% c) z, H* }! EDecision:
! m! a4 \: _! I8 q8 LRequirements for construction and performance as specified in IEC 61730-1:2004 and IEC 61730-
6 b& N- e. ?( \, X/ w2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic
modules. Although these standards provide suitable rationale for evaluating the construction and
* x( P  b. {; s4 M3 j  i2 Dperformance of the samples obtained by the CBTL, the issue of certification remains at the
discretion of the NCB.
# v/ I7 Z8 k% h
9 A* e- p7 e( s/ r, `1 `& Z