|
4.5.5 Resistance to abnormal heat3 F* Q" S: S8 W, ?7 o8 v
Thermoplastic parts on which parts at HAZARDOUS VOLTAGE are directly mounted shall be resistant E) F s6 u9 |+ d
to abnormal heat.9 N) ?/ Q) X. W+ C& G2 _
Compliance is checked by subjecting the part to the ball-pressure test according to IEC$ E3 Z0 V: t1 C% \
60695-10-2. The test is not made if it is clear from examination of the physical characteristics of1 ^8 R, t$ b6 O: o- B* B6 z1 z
the material that it will meet the requirements of this test.
( v9 z, y2 ^ |" o& ?, XThe test is made in a heating cabinet at a temperature of (T − Tamb + Tma + 15 °C) ± 2 °C.0 ]7 E7 D0 U- ]. {) i( \
However, a thermoplastic part supporting parts in a PRIMARY CIRCUIT is tested at a minimum of 1255 }3 t) t% ^" |) r/ e. z; P- C
°C.
& J. U7 l* k3 }) k* k" wThe significances of T, Tma and Tamb are as given in 1.4.12.1. |
|