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以下引自IEC 60065-2005 9 g$ D1 O& ?" X# k$ W2 V' A
(不好意思,误导你了,非常抱歉 [s:5])
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(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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9 Q# X X. s2 p11.2.5 Windings! h7 X2 y2 \6 x$ I: u$ W/ F) b
* i' c9 M. M, P* z' {4 `) Q0 {/ uThe temperature rise of windings shall not exceed the values given in Table 3, items b) and d)0 c" q4 S1 ]7 ]1 B& ~$ o
"Fault conditions", with the following exceptions.( P4 S2 |4 Z. m- j9 K$ `: H$ s/ I
h6 j; O, ?( W* a6 i9 }0 p/ M– 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.
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: z* p, @/ F# I( _In 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.% z& |2 X6 w8 q& ^/ E# Y, |4 Q
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– 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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: e- P! i8 U6 V5 xIn 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.
% x; E: x1 p; o4 R# F+ s 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. ! L* B( Q. F+ p9 G
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– 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.4 Y {! ~9 N! n0 y5 s
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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.6 z0 d" w/ ^0 z p" p
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