DSH 279 thermal cut out requirements

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DSH 279

thermal cut out requirements 4 u6 C2 q& d" j

24.101 ; m! f8 P" R! f* `( t- Q$ V; `

60335-2-61(ed.1) - b# `: `0 ]+ M- B

Standard: IEC 60335-2-61:Ed. 1.0 Sub clause: 24.101 Sheet n. 279
Page 1 (1)
0 L  X7 I/ x9 `" R4 n: @Subject: Thermal cut out requirements
, g; U2 E1 r6 D# |3 A" hKey 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
0 A6 ~) ?& k5 v/ lcore are incorporated, at least one shall be of the non-self –resetting type”.
3 v! P. E8 I: u! _* ^+ X5 TDoes 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
! G+ L9 A8 x2 O2 Rtype, if, to fulfil all the requirements of the standard, the appliance is equipped with
  Z  Z: q) w1 t3 `a second thermostat or temperature limiter.
2. At least one thermal cut out has to be of the non self resetting type, if the appliance
7 ], d  Q9 ]' @is equipped with more than one thermal cut-out
Decision:
4 V* g' Q6 {1 e* J/ W6 y3 C$ B3 s1 k1.1 Yes
1.2 No, at least one of the control devices which operate during clause 19 (when control
, e: ~4 M( g7 ?0 M& Ldevices operating in clause 11 are short-circuited) shall be non self resetting.
2. Yes
9 D4 x& l$ L% t8 ]- f5 {

, e$ E% {7 e; Q; ^5 {% z" U4 z