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以下引自IEC 60065-2005 ) ?/ K# u! u6 J* f' o
(不好意思,误导你了,非常抱歉 [s:5])3 T `* W% V' P" H) Y
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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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+ w% ~2 `& \4 R2 q11.2.5 Windings
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# O1 s8 \3 i7 }8 sThe temperature rise of windings shall not exceed the values given in Table 3, items b) and d)( C% L3 i P& q0 p. ^3 h9 Z3 _
"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.
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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.4 @- O% _9 x) p; G- ?; j. J- y
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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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In 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.5 U6 J6 {6 |' B% v o" X
No failure is allowed.4 J2 `$ |$ K: i7 ^. u
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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. ) P1 Z7 o1 x8 H" T. C1 Z3 v/ q
! o. N% b8 x; b2 b" D( n8 I– 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.9 w( ~! u) C* s7 P* U
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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.
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