|
|

楼主 |
发表于 2007-6-27 10:40
|
显示全部楼层
大家好,认证工程师说是根据:30 Resistance to heat and fire
0 f) K; Y) m$ p- P. D: p30.1 External parts of non-metallic material, parts of insulating material supporting live
0 W4 q4 _# v% r) pparts including connections, and parts of thermoplastic material providing supplementary
* C" z. d# v: v) e: z; L* {insulation or reinforced insulation, shall be sufficiently resistant to heat if their deterioration$ n z T6 S" ~. \+ l
could cause the appliance to fail to comply with this standard.
9 P& r) D Z% ?0 j+ l$ {This requirement does not apply to the insulation or sheath of flexible cords or internal wiring.
1 l" R! U/ z( n9 NCompliance is checked by subjecting the relevant part to the ball pressure test of
' { n+ [0 ]4 I: b1 ?) oIEC 60695-10-2.. p7 G8 V# I# h: q d2 J. x
The test is carried out at a temperature of 40 °C ± 2 °C plus the maximum temperature rise
, ?, P m6 ^1 Y, v S7 ndetermined during the test of clause 11, but it shall be at least/ s/ k% \( k& x2 ]1 T! z( \6 \2 u
– 75 °C ± 2 °C, for external parts;
& [0 F& d: S0 C– 125 °C ± 2 °C, for parts supporting live parts.7 N7 K% D' p/ ] p- d
However, for parts of thermoplastic material providing supplementary insulation or) Z: B1 w' b# h
reinforced insulation, the test is carried out at a temperature of 25 °C ± 2 °C plus the/ G0 K. O6 Y+ [ W
maximum temperature rise determined during the tests of clause 19, if this is higher. The/ h4 X, `2 B: D- t& r
temperature rises of 19.4 are not taken into account provided that the test is terminated by
8 O5 X: _" X; a. N8 u7 c1 b) \the operation of a non-self-resetting protective device and it is necessary to remove a
& t, }$ w( ]9 ccover or use a tool to reset it.
# p3 @7 Q$ w5 g2 C. }3 q! vNOTE 1 For coil formers, only those parts that support or retain terminals in position are subjected to the test.
6 _- U4 O* N2 k7 R3 n3 m+ i0 uNOTE 2 The test is not carriedout on parts of ceramic material.
. w5 Z$ Q3 X0 SNOTE 3 The selection and sequence of tests for resistance to heat are shown in figure O.1.” |
|