PDSH 441A Sheathed heating elements

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

PDSH 441A ; |( B  O8 {5 ]) F % W1 h! r, p" H9 t: i+ j1 F

Sheathed heating elements

19.11.2

60335-1(ed.3) & 60335-1(ed.4);am1;am2 & 60335-1(ed.5) & ~8 i# l) Q: f& F! E

Standard(s):
3 \  h% W: _7 y' gIEC60335-1:1991, 3rd Ed.
IEC60335-1:2001, 4th Ed. + A1 and A2
IEC60335-1:2010, 5th Ed.
  h' l% k! k, c( QSub-clause(s): 19.11.2
No. Year 2010
" [' {; c0 x7 Z; E# s& O4 uPDSH-441A
Category: HOUS Developed by: ETF-1
# p* m$ Y* t5 {' N4 Y9 c* z" HSubject:
( M$ I* k( O4 L6 J5 BSheathed heating elements
$ e2 A2 g5 T6 v# @% C" Y6 SKey words:
& q) p6 L' P$ h; `0 @- Abnormal, sheathed element
- Protective electronic circuit
To be approved at the 2011 CTL Plenary Meeting
Question:
Some appliances have the following circuit:
$ t4 z4 l+ m. ^  M( R, EIn 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
! K" n# W. u7 B9 I4 U0 gIn our opinion, an additional mechanical thermal cut-out is required.
Convenor’s note:
# K; M+ N. N; z6 I6 n  OIn clause 19.5, the electronic thermostat will operate to limit the temperature in one
% `9 V5 W- D6 c9 _2 v% i" Lconfiguration. This enquiry is to seek confirmation whether an additional cut out is
required 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
& t' ~% F2 ?! `) W/ I0 selectronic thermostat is considered to be a PEC and has to be evaluated according to
3 k$ w5 c$ s: l' U5 K. ]! Tthe relevant tests.
1 s% s/ L( F/ e0 i6 [0 C5 ^


, j' j; K1 }% l% k8 q6 }
/ G% Z" x) F' i9 A3 f