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发表于 2007-6-27 10:40
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大家好,认证工程师说是根据:30 Resistance to heat and fire
; \' s% E' G* r30.1 External parts of non-metallic material, parts of insulating material supporting live
1 g7 K5 v' } v& l+ Mparts including connections, and parts of thermoplastic material providing supplementary
6 ^: F& f( R7 ginsulation or reinforced insulation, shall be sufficiently resistant to heat if their deterioration$ q4 Q3 l- V# h- X8 s
could cause the appliance to fail to comply with this standard.
* `! M7 g1 W1 Y; Q6 v/ W& EThis requirement does not apply to the insulation or sheath of flexible cords or internal wiring./ U$ m+ w, {' x' v4 @- W4 s
Compliance is checked by subjecting the relevant part to the ball pressure test of
0 z% r n9 t5 vIEC 60695-10-2.* J8 L) N0 [4 q
The test is carried out at a temperature of 40 °C ± 2 °C plus the maximum temperature rise
9 ~( h7 X9 Q" M: Fdetermined during the test of clause 11, but it shall be at least4 W* [' y2 |) I. ^
– 75 °C ± 2 °C, for external parts;
4 q: q" a$ T, X8 W+ ?" K' Z– 125 °C ± 2 °C, for parts supporting live parts.: P* N. _! X) p- [0 s' q
However, for parts of thermoplastic material providing supplementary insulation or
& B d" P8 L9 C& a, ~reinforced insulation, the test is carried out at a temperature of 25 °C ± 2 °C plus the
" p. ~/ Z9 r3 a/ k; Y# imaximum temperature rise determined during the tests of clause 19, if this is higher. The
* P3 a( k* f7 r; A; \5 @! gtemperature rises of 19.4 are not taken into account provided that the test is terminated by
0 E. P$ g: B, D/ m! ]- e8 Rthe operation of a non-self-resetting protective device and it is necessary to remove a
) u4 G1 W6 g% ~7 m2 A( v. x; c5 A- ^cover or use a tool to reset it.
. n8 L# n* S1 X, u7 r6 m' CNOTE 1 For coil formers, only those parts that support or retain terminals in position are subjected to the test. q9 S' I, N7 `! K/ G2 w
NOTE 2 The test is not carriedout on parts of ceramic material.) ~! d3 q/ \9 ~3 Z# ]4 N) Y% X
NOTE 3 The selection and sequence of tests for resistance to heat are shown in figure O.1.” |
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