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Standard(s): , [4 x' X4 ]3 \1 _6 W$ Y& b$ Z4 TIEC60335-1:1991, 3rd Ed.0 ]# w+ z4 s6 l& ^2 |& Q
IEC60335-1:2001, 4th Ed. + A1 and A2 * K, E1 b- {& a: \IEC60335-1:2010, 5th Ed. - o; k8 M5 B. {2 Y* Y* pSub-clause(s): 19.11.2/ I2 o" ?" N$ q! }/ ^. G
No. Year 2010 6 x. X' B& q9 Q* h, J; p8 VPDSH-441A ( Z& {, g9 u& u, P$ F6 k- a4 o$ E3 u
Category: HOUS Developed by: ETF-17 X4 n( N, t' B" ?; q. v5 @: a
Subject: 8 s5 W! |; F L3 Y' a3 aSheathed heating elements 9 {1 P) v6 w7 n% X. _4 [Key words: ' M0 q/ U! w, `9 Z/ D- Abnormal, sheathed element # }: b% b; ^+ M% I' c. J- Protective electronic circuit, c, Y) k4 r/ N4 {! i
To be approved at the 2011 CTL Plenary Meeting % K4 _/ @/ Z6 f; o Z# RQuestion: + d" {9 Y6 Y% z; e) N. ]Some appliances have the following circuit:) J5 s0 R8 G( F% D% K6 [. a& J
In Clause 19.11.2, it is stated that, if an electronic circuit operates to ensure compliance. V" M+ i, P$ w3 C/ f
with clause 19, the relevant tests of clause 19 should be repeated with 0 b+ a3 g! ~2 _7 Y6 l: n' I sa single fault simulated as in a) through f) or g) of cl.19.11.2 8 @5 |2 |6 ^+ u8 o* T. N) F" cIn our opinion, an additional mechanical thermal cut-out is required." q" W0 W0 w! c
Convenor’s note: 0 Z1 w- B) K* I- gIn clause 19.5, the electronic thermostat will operate to limit the temperature in one8 i9 W5 p) \0 j! j
configuration. This enquiry is to seek confirmation whether an additional cut out is 4 G( I; Z8 W" Drequired to comply with 19.5 if a single fault prevents the operation of the thermostat. / U* L- D" |! C# O4 `7 zDecision: 9 M! M, Y( p- m% e3 }3 Q+ M0 dAn additional thermal cut-out is required or (for edition 4.1, 4.2 and edition 5) the7 j6 d! M/ R# S0 E( E& q
electronic thermostat is considered to be a PEC and has to be evaluated according to! F( A; d6 Q! k- W5 h# ^7 H; ~9 ]
the relevant tests. $ z' R- U( Y$ {) N' ^ 2 {& \0 v y/ E' P1 V* l[attach]75969[/attach] : r. {) w2 w7 h5 d; ?9 V: f* Y4 J, S+ |" F: m! k& I/ b
PDSH 441A! r2 @6 e5 @$ R4 n" t, A