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大家好,认证工程师说是根据:30 Resistance to heat and fire
& b- k& J ?+ \ {8 j1 ?9 j30.1 External parts of non-metallic material, parts of insulating material supporting live; ?: K( `& P, y" S4 c
parts including connections, and parts of thermoplastic material providing supplementary% ^% @8 e. k* X O
insulation or reinforced insulation, shall be sufficiently resistant to heat if their deterioration' |: U, Y2 H# T. L. U( y# f
could cause the appliance to fail to comply with this standard. a6 y* B5 v% \. I" q$ \. V
This requirement does not apply to the insulation or sheath of flexible cords or internal wiring., e4 y, W# j* j
Compliance is checked by subjecting the relevant part to the ball pressure test of- I) G" g, e: g0 S& L
IEC 60695-10-2.
8 } F. Y/ o! e2 \+ \The test is carried out at a temperature of 40 °C ± 2 °C plus the maximum temperature rise
. t4 I# S z: U/ U" p/ mdetermined during the test of clause 11, but it shall be at least% d ]: S- e7 G+ `1 t
– 75 °C ± 2 °C, for external parts;+ t9 U. J* h! O e# ~+ r7 [
– 125 °C ± 2 °C, for parts supporting live parts.6 ^( {% J) U! d
However, for parts of thermoplastic material providing supplementary insulation or
' T: h4 u7 I" V6 Z. N6 h7 J" q0 \reinforced insulation, the test is carried out at a temperature of 25 °C ± 2 °C plus the: Z$ K# F, G2 k
maximum temperature rise determined during the tests of clause 19, if this is higher. The
4 T* E& n3 v: }. z; utemperature rises of 19.4 are not taken into account provided that the test is terminated by1 Y* R' U' L/ k& ?1 `
the operation of a non-self-resetting protective device and it is necessary to remove a
7 z. u7 g9 U4 n9 i2 \0 Ycover or use a tool to reset it.
6 g) G( W. @8 B2 {7 R3 |' nNOTE 1 For coil formers, only those parts that support or retain terminals in position are subjected to the test.7 ?# U0 K+ r8 {( i5 ^( {
NOTE 2 The test is not carriedout on parts of ceramic material.
. J o3 { L) w* t3 ONOTE 3 The selection and sequence of tests for resistance to heat are shown in figure O.1.” |
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