PDSH 441A Sheathed heating elements

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广东安规检测
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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

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自动卷线器试验机

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各种灯头量规现货

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GB1002插头量规

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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 ; y. ]# s$ D- M& i! i

Sheathed heating elements

19.11.2 0 I9 F5 O3 G0 X/ ?8 P8 T$ d

60335-1(ed.3) & 60335-1(ed.4);am1;am2 & 60335-1(ed.5) + _9 ]3 D$ g" N/ M* c

Standard(s):
: k2 I5 ~' s2 W- U6 g0 rIEC60335-1:1991, 3rd Ed.
$ p/ {1 Q- b9 T0 V% b  Y3 S2 @) \IEC60335-1:2001, 4th Ed. + A1 and A2
IEC60335-1:2010, 5th Ed.
, V2 ]# F: m3 {& p$ r- u; g. [Sub-clause(s): 19.11.2
  P& K, z, x7 {- I( {No. Year 2010
PDSH-441A
0 Z* K. V% g7 C( }Category: HOUS Developed by: ETF-1
+ e" o4 H9 D9 `. h, {# {Subject:
Sheathed heating elements
Key words:
* l+ q- j! L6 l, H: p. B/ c- Abnormal, sheathed element
- Protective electronic circuit
To be approved at the 2011 CTL Plenary Meeting
Question:
Some appliances have the following circuit:
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
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.
Convenor’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
2 ~5 V3 ~* h% O" Y/ g" x' e7 S# prequired 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
/ V1 ]) T4 u" ^electronic thermostat is considered to be a PEC and has to be evaluated according to
# h6 V1 ^. O2 s# O! d, fthe relevant tests.
1 K' S% Q! _% J9 F6 F

2 j- h. z4 ^* D. L/ ]) j3 r/ M
4 r$ G3 e" j0 j$ t