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以下引自IEC 60065-2005
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2 H. `, d. [7 S( \/ n, I2 r(异常测试时,变压器的温升可以超出限值,注意下面的红色字体和蓝色字体部分。)
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11.2.5 Windings0 Z; Q, ]1 f& @9 q) A$ s# f& O' s
! q$ o5 n, y" u/ Z6 MThe temperature rise of windings shall not exceed the values given in Table 3, items b) and d)
/ B/ L6 s1 t, Y5 @* ["Fault conditions", with the following exceptions.
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– If the temperature is limited due to the operation of replaceable or resettable protective devices, the temperature rises may be exceeded until 2 min after the operation of the device.2 m& C+ r4 A+ ?" |) ?- _4 }5 Q
2 \% i& Y; o1 ~+ xIn the case of windings providing protection against electric shock or where a fault could result in a fire hazard, the test is carried out three times and the winding is then subjected to the dielectric strength test of 10.3 without the humidity treatment of 10.2, starting within 1 min after the temperature rise measurement. No failure is allowed.+ y' G/ e& N' j; F* Z3 o) b9 [
% ?8 e% ^; X; t8 K! p2 l, i– If the temperature is limited due to the operation of an integral non-resettable or a nonreplaceable protective device or due to the open circuiting of a winding, the temperature rises may be exceeded, but the test shall be carried out three times using new components.
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) U( R9 l. S( L. y9 D2 c& b% m' a2 BIn the case of windings providing protection against electric shock or where a fault could result in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3 without the humidity treatment of 10.2, starting within 1 min after the temperature rise measurement.
1 p, N5 x% P* f- ~; SNo failure is allowed.
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– Higher temperature rises are allowed for windings, provided a failure of their insulation cannot cause an electric shock hazard or a fire hazard and that they are not connected to sources capable of supplying power in excess of 5 W under normal operating conditions. ( e. O3 f5 ^1 N$ w; N+ l
* z1 ?9 ?( P% _8 {4 O– If a temperature rise value is exceeded and if there is doubt as to whether or not a hazard exists, the insulation concerned is short-circuited and the tests of 11.1 and 11.2.2 are repeated.
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NOTE: If the insulation is incorporated in a winding in such a way that its temperature rise cannot be measured directly, the temperature is assumed to be the same as that of the winding wire.' N% Y: E# m; w' ^+ q L
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