DSH 740 Test method for appliances incorporating double lid

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广东安规检测
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DSH 740 2 h# U$ a9 _+ M( j

Test method for appliances incorporating double lid * Z; ?* y- u4 c: `3 x7 V

20.104

60335-2-4(ed.6) 9 o$ p: C7 K' I0 c7 c

Question:
' L, `0 e7 f. }: o' k& uIn the 5th and 6th paragraphs of Clause 20.104, it is specified as follows:
For appliances incorporating two lids where the second lid opens independently of the first lid, the first lid is gradually opened and with an opening greater than 50mm, the motor shall be disconnected from the supply and within 2s, the drum speed shall not exceed 20m/s.
# t% V# u/ c- s2 |! l2 T- iThe second lid is gradually opened and
– with an opening of 4 mm to 10 mm, it shall not be possible to touch parts rotating at a speed exceeding 60 rev/min with the test probe 12 of IEC 61032;
! m6 z" i2 W- {  Y1 F– with an opening greater than 10 mm, but not more than 12 mm, it shall not be possible to touch parts rotating at a speed exceeding 60 rev/min with a test rod 3 mm in diameter and 120 mm long.
In addition, the test probe B of IEC 61032 is applied and shall not come within a distance of 20 mm from the rotating parts;
& ]3 i& [: m) F, L. _– with an opening greater than 12 mm and within 7s, the drum speed shall not exceed 60 r/min.
8 U* R2 Y" a7 r5 DWe would like to clarify how the actual testing is to be applied especially related to the opening of second lid from the opening of the second lid.
, l  s" M/ o/ T8 L0 x) eDecision:
The second lid is gradually opened 2s after the following conditions:
- The first lid is opened with an opening greater than 50mm, and
- The motor is disconnected from the supply.
The test procedure is as follows.
, _5 y% e0 ~9 X5 V3 V# o- \% }* e1. Opening of the first lid greater than 50 mm - (2s) - Opening of 4 mm to 10 mm for the second lid –Check whether test probe 12 touches parts rotating at a speed exceeding 60 rev/min.
6 c4 k2 K  r% `2. Opening greater than 50 mm for the first lid - (2s) - Opening greater than 10 mm, but not more than 12 mm for the second lid - Check whether test rod and test probe B come within a distance of 20 mm from the rotating parts.
3. Opening greater than 50 mm for the first lid - (2s) - Opening greater than 12 mm for the second lid -(7s)
– Check whether the drum speed exceeds 60 r/min

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