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4.5.5 Resistance to abnormal heat& I, ^' y3 U! s: \
Thermoplastic parts on which parts at HAZARDOUS VOLTAGE are directly mounted shall be resistant: O) |: q! b' D+ i/ F
to abnormal heat.
) r# J+ k3 Y* B9 |5 q/ pCompliance is checked by subjecting the part to the ball-pressure test according to IEC; t1 g6 `/ V1 h0 h3 N/ }4 r5 `
60695-10-2. The test is not made if it is clear from examination of the physical characteristics of
0 S/ [ F2 h: xthe material that it will meet the requirements of this test.8 @( R% l6 s4 D# w" N* U- D
The test is made in a heating cabinet at a temperature of (T − Tamb + Tma + 15 °C) ± 2 °C.
( q) m4 ?! g% Y. f+ t% I3 @1 \( X9 OHowever, a thermoplastic part supporting parts in a PRIMARY CIRCUIT is tested at a minimum of 125: s$ e3 Q; H) m) P# ]! }
°C.
8 r; ]- b+ J0 h: ~The significances of T, Tma and Tamb are as given in 1.4.12.1. |
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