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4.5.5 Resistance to abnormal heat: I0 `( `, {* `: X) P
Thermoplastic parts on which parts at HAZARDOUS VOLTAGE are directly mounted shall be resistant
. }- L1 [; t5 `( ~9 r, X) xto abnormal heat.2 Y$ z, m- A0 c; \( R4 T
Compliance is checked by subjecting the part to the ball-pressure test according to IEC
5 B* `4 v- K/ v B& m4 P, }60695-10-2. The test is not made if it is clear from examination of the physical characteristics of! \$ e4 X1 |* `3 q
the material that it will meet the requirements of this test.
5 E; h: [8 G# }7 OThe test is made in a heating cabinet at a temperature of (T − Tamb + Tma + 15 °C) ± 2 °C.0 \' V! H6 T0 h0 D
However, a thermoplastic part supporting parts in a PRIMARY CIRCUIT is tested at a minimum of 125
* z2 l) w) |# t9 @2 s6 r6 I°C.
& s7 e3 E" _5 o% _# M0 IThe significances of T, Tma and Tamb are as given in 1.4.12.1. |
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