PDSH 441A Sheathed heating elements

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灯具防风罩

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E12灯头量规

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IEC60335试验指甲

PDSH 441A 6 G) x1 Q9 X8 N! [: p9 f

Sheathed heating elements

19.11.2 0 E: {7 a: x9 B. j4 p

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

# B6 u6 p, Z) M8 \8 VStandard(s):
4 V# S4 e1 u0 R2 hIEC60335-1:1991, 3rd Ed.
) U1 N# e. Y! Z$ b1 O+ ZIEC60335-1:2001, 4th Ed. + A1 and A2
3 ~9 B) k0 }" \) Z4 r3 A6 KIEC60335-1:2010, 5th Ed.
2 ^$ g. l- R/ e: Y- xSub-clause(s): 19.11.2
No. Year 2010
PDSH-441A
Category: HOUS Developed by: ETF-1
Subject:
Sheathed heating elements
Key words:
: R* a; D. ^7 \: \; }- Abnormal, sheathed element
' i6 J8 F/ V* ?8 ?( B* K- Protective electronic circuit
& Q8 o. X2 d( i# l5 STo be approved at the 2011 CTL Plenary Meeting
Question:
Some appliances have the following circuit:
( }  d, l1 r0 y/ ?( i+ v8 NIn Clause 19.11.2, it is stated that, if an electronic circuit operates to ensure compliance
# C6 m! |/ X/ ^0 Iwith 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
9 E) e6 Q1 m) o. tIn our opinion, an additional mechanical thermal cut-out is required.
' `/ N( P+ }3 d. Y) N4 }5 Y4 rConvenor’s note:
7 s, W' R5 H; V7 N( OIn 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
required to comply with 19.5 if a single fault prevents the operation of the thermostat.
Decision:
' N) U4 j1 E3 o# i5 BAn additional thermal cut-out is required or (for edition 4.1, 4.2 and edition 5) the
electronic thermostat is considered to be a PEC and has to be evaluated according to
5 q' n' |; y, Q$ A! ?0 Fthe relevant tests.


0 u6 h) i1 x: I: K; y' j: ~4 }) @