DSH 279 thermal cut out requirements

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DSH 279 & t. J$ X8 h1 c5 w; }% C4 Y) P

thermal cut out requirements

24.101 # M& ]& ?& @- T8 `

60335-2-61(ed.1) # f( ~% B* g( p4 ]7 |

0 k- D) k/ u. i# DStandard: IEC 60335-2-61:Ed. 1.0 Sub clause: 24.101 Sheet n. 279
Page 1 (1)
Subject: Thermal cut out requirements
Key words: - thermal cut-out   - self resetting
Decision n.20 taken at 36th meeting/1999
- Y1 i) }0 V$ {5 M3 m* r7 p( PQuestion: sub clause 24.101 reads: “if thermal cut-outs which limit the temperature of the
core are incorporated, at least one shall be of the non-self –resetting type”.
Does this mean that:
1.1 It is not necessary to incorporate a thermal cut-out in a thermal storage heater.
1.2 There is no obligation to incorporate a thermal cut out of the non self resetting
$ e; T, m! q1 }8 P( gtype, if, to fulfil all the requirements of the standard, the appliance is equipped with
3 v% g- g5 k( }7 Ba second thermostat or temperature limiter.
/ Z2 _3 T2 X7 t2. At least one thermal cut out has to be of the non self resetting type, if the appliance
4 x* G& v7 e/ ~7 nis equipped with more than one thermal cut-out
Decision:
1.1 Yes
: Z8 Y& W* ~; s% T  {$ k1.2 No, at least one of the control devices which operate during clause 19 (when control
! {( v. ]! `. j6 K3 Adevices operating in clause 11 are short-circuited) shall be non self resetting.
2. Yes
7 x3 D9 q$ c& z9 u; G
# ]; R7 B+ K- ]. H& a* x# `$ l