PDSH 441A Sheathed heating elements

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广东安规检测
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IEC60335试验指甲

PDSH 441A # V7 L( X/ g# t, n, }: h/ y ; _6 I$ N. M' d2 J2 s7 K$ k: m

Sheathed heating elements + O; X) G- }% H$ K

19.11.2

60335-1(ed.3) & 60335-1(ed.4);am1;am2 & 60335-1(ed.5)

# S) q: Z( d- I4 g3 m% lStandard(s):
IEC60335-1:1991, 3rd Ed.
# {8 ?; _3 N# dIEC60335-1:2001, 4th Ed. + A1 and A2
* X( d4 W% k5 d' ^IEC60335-1:2010, 5th Ed.
2 o! T, A3 n% C( B% S% f3 l. d0 X9 GSub-clause(s): 19.11.2
No. Year 2010
% ~5 _( a/ Q# g4 |3 Z4 w* c3 TPDSH-441A
+ m$ d$ h) o, H) C9 rCategory: HOUS Developed by: ETF-1
Subject:
Sheathed heating elements
Key words:
4 e1 j- @  F6 X+ q2 \- A& z! Z- Abnormal, sheathed element
, e* o0 Q" Q. u1 i5 m  a- Protective electronic circuit
% p/ o" u- w7 G; Q- YTo be approved at the 2011 CTL Plenary Meeting
7 D0 n3 \' b, R" w& BQuestion:
Some appliances have the following circuit:
( R' m/ V/ b% W; P% C" _  [In Clause 19.11.2, it is stated that, if an electronic circuit operates to ensure compliance
with clause 19, the relevant tests of clause 19 should be repeated with
: B: i9 A) |; X6 j* [a single fault simulated as in a) through f) or g) of cl.19.11.2
( k) K" p' O3 o& c" u0 yIn our opinion, an additional mechanical thermal cut-out is required.
/ V& d; G1 O5 C! ZConvenor’s note:
In clause 19.5, the electronic thermostat will operate to limit the temperature in one
" k3 f) i* l) T/ Wconfiguration. This enquiry is to seek confirmation whether an additional cut out is
$ |/ Y; u9 @2 [# _2 M; x( r& Srequired to comply with 19.5 if a single fault prevents the operation of the thermostat.
: L  `$ p* B  z4 M4 y; hDecision:
. \7 y) h: ?2 UAn additional thermal cut-out is required or (for edition 4.1, 4.2 and edition 5) the
! d7 q* p: ?: i. w, selectronic thermostat is considered to be a PEC and has to be evaluated according to
- E4 Q( e, x5 E& ithe relevant tests.
) w$ p) S; d2 g& ]. \1 _
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& S$ e& f$ ~: m' r) m" C: {