PDSH 441A Sheathed heating elements
http://decisions.iecee.org/icons/ecblank.gif PDSH 441A
Sheathed heating elements
19.11.2
60335-1(ed.3) & 60335-1(ed.4);am1;am2 & 60335-1(ed.5)
Standard(s):
IEC60335-1:1991, 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
Subject:
Sheathed heating elements
Key words:
- 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
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
electronic thermostat is considered to be a PEC and has to be evaluated according to
the relevant tests.
页:
[1]
