PDSH 441A Sheathed heating elements

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IEC60335试验指甲

PDSH 441A % h  g( c- ?5 Y- C

Sheathed heating elements ( t, y, O2 P4 @5 O

19.11.2

60335-1(ed.3) & 60335-1(ed.4);am1;am2 & 60335-1(ed.5) : F" Z3 ~% _% C7 Z+ S6 c

- }0 Q: z# @6 v  V. }' E; P0 U0 o7 L! iStandard(s):
: e0 E  t4 D% Z6 z- FIEC60335-1:1991, 3rd Ed.
IEC60335-1:2001, 4th Ed. + A1 and A2
IEC60335-1:2010, 5th Ed.
Sub-clause(s): 19.11.2
No. Year 2010
PDSH-441A
Category: HOUS Developed by: ETF-1
0 e# S. v1 K7 m* RSubject:
Sheathed heating elements
7 w9 u% B+ p7 h: k- v. Y1 E( F. TKey words:
6 \# L, N! [5 |; S& E* D5 |" V- Abnormal, sheathed element
- Protective electronic circuit
To be approved at the 2011 CTL Plenary Meeting
. Q# p3 I  v2 L8 t6 VQuestion:
Some appliances have the following circuit:
1 t6 }1 m- T# B2 x$ }" x/ _0 M8 AIn 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
a single fault simulated as in a) through f) or g) of cl.19.11.2
In our opinion, an additional mechanical thermal cut-out is required.
5 k% }0 F% O( G( X9 QConvenor’s note:
In clause 19.5, the electronic thermostat will operate to limit the temperature in one
configuration. This enquiry is to seek confirmation whether an additional cut out is
' C7 D5 M0 l" r0 Jrequired to comply with 19.5 if a single fault prevents the operation of the thermostat.
Decision:
An additional thermal cut-out is required or (for edition 4.1, 4.2 and edition 5) the
4 A$ [% q% k  e+ L7 Gelectronic thermostat is considered to be a PEC and has to be evaluated according to
the relevant tests.

5 e; v% V& J' Q, w- n: A' j
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' c: p( K3 |7 F2 O