DSH 279 thermal cut out requirements

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DSH 279

thermal cut out requirements

24.101 # x0 V) }( X, h& \

60335-2-61(ed.1) 3 Q7 p: O% _2 }% |2 d+ N, e: {

Standard: IEC 60335-2-61:Ed. 1.0 Sub clause: 24.101 Sheet n. 279
Page 1 (1)
Subject: Thermal cut out requirements
5 n; I( m+ X6 W8 u) N) ]" vKey words: - thermal cut-out   - self resetting
Decision n.20 taken at 36th meeting/1999
Question: 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”.
9 H# N0 k- C0 ~  u2 N# i- z7 ^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
type, if, to fulfil all the requirements of the standard, the appliance is equipped with
# h% Z. c- s  R# Qa second thermostat or temperature limiter.
3 ^; X+ Y& A4 |1 u# G) Y2. At least one thermal cut out has to be of the non self resetting type, if the appliance
is equipped with more than one thermal cut-out
Decision:
; C% k: u$ v1 o5 U1.1 Yes
  X% K0 m9 D5 h3 ~3 @' G1.2 No, at least one of the control devices which operate during clause 19 (when control
3 y, B  R5 B) vdevices operating in clause 11 are short-circuited) shall be non self resetting.
$ U! Q6 k* N0 n+ D2. Yes
- H$ L$ h, }2 ~6 \6 z5 G
% a8 }' p. _  {/ _- Z
; }& H! X" Q) i! L* h/ @5 P