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4.5.5 Resistance to abnormal heat
: k& _. ]# n/ uThermoplastic parts on which parts at HAZARDOUS VOLTAGE are directly mounted shall be resistant
' u k7 J; S5 y5 g( p* |to abnormal heat.& }2 c( w7 }: E% n. [
Compliance is checked by subjecting the part to the ball-pressure test according to IEC4 }+ j+ m6 _/ G+ n
60695-10-2. The test is not made if it is clear from examination of the physical characteristics of8 N. C9 q4 I4 b, @- L
the material that it will meet the requirements of this test.
1 K& b3 E* J6 L& q6 }# e& _# H& s; v, `The test is made in a heating cabinet at a temperature of (T − Tamb + Tma + 15 °C) ± 2 °C.
4 P. L0 J4 g( I) ^8 i$ eHowever, a thermoplastic part supporting parts in a PRIMARY CIRCUIT is tested at a minimum of 1255 A. o: ]8 _4 [; K2 O, d3 ~# \& v* v5 A
°C.) L+ y( p J3 A9 B1 G. n7 u6 q# y
The significances of T, Tma and Tamb are as given in 1.4.12.1. |
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