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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 fire3 Z% ~- e" W/ I/ H) L
30.1 External parts of non-metallic material, parts of insulating material supporting live- [( [" ^& R: ^9 ?
parts including connections, and parts of thermoplastic material providing supplementary! z0 m. Z6 ?8 M! C" `7 S$ j
insulation or reinforced insulation, shall be sufficiently resistant to heat if their deterioration
( O$ D8 z& y+ o- a/ N. b Q$ s7 Wcould cause the appliance to fail to comply with this standard.' {) H) Y) y% E# B! h
This requirement does not apply to the insulation or sheath of flexible cords or internal wiring.
7 e& Y9 Q3 n" J" k1 lCompliance is checked by subjecting the relevant part to the ball pressure test of( j; S3 u" d2 n* }) Z# M! w" M- p5 x
IEC 60695-10-2.
! p/ D/ m" i$ F- R# m$ |The test is carried out at a temperature of 40 °C ± 2 °C plus the maximum temperature rise
9 p" n U, j/ E' a! T5 O: {$ Tdetermined during the test of clause 11, but it shall be at least
3 S. `: l) Z3 ?, M8 w& W) ^) M– 75 °C ± 2 °C, for external parts;# ?) o0 ~2 m) N
– 125 °C ± 2 °C, for parts supporting live parts.
, d( n9 g y9 F+ F" E$ x( R9 hHowever, for parts of thermoplastic material providing supplementary insulation or
/ K. E7 c# r# b5 a" {reinforced insulation, the test is carried out at a temperature of 25 °C ± 2 °C plus the4 V5 \( N3 Q3 l [
maximum temperature rise determined during the tests of clause 19, if this is higher. The
# v- c& W; \/ itemperature rises of 19.4 are not taken into account provided that the test is terminated by' Z, a; e1 J4 `* k/ R( F
the operation of a non-self-resetting protective device and it is necessary to remove a+ m+ V p( E* N, f- H* x8 f3 b
cover or use a tool to reset it.
0 f" ?1 V; ^. b5 e# ?* V6 aNOTE 1 For coil formers, only those parts that support or retain terminals in position are subjected to the test.9 S& \& r. O, u4 S4 x
NOTE 2 The test is not carriedout on parts of ceramic material.
$ B( h b5 u, T. W' |, ENOTE 3 The selection and sequence of tests for resistance to heat are shown in figure O.1.” |
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