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以下引自IEC 60065-2005 5 ]6 X0 I0 z% n+ r6 r
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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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11.2.5 Windings: R3 c& m2 t" ?; y2 ^' U. y
# B0 A/ w8 ]# @: mThe temperature rise of windings shall not exceed the values given in Table 3, items b) and d)5 P" t. {' L* r+ g0 R. w
"Fault conditions", with the following exceptions.* V3 P4 e+ E" p/ g! j5 z
1 d @1 l$ X I _– 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.0 g! G5 j! ?+ F" {
" A3 _/ x1 G2 e" Y– 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.1 p- }# b/ D* j& b; R9 _2 b
' f8 [. h- a4 p! J" ?1 pIn 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.$ R" { y$ o5 M3 P0 J
No 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.
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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.
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8 Q4 Q8 ~1 [& O) ?5 M0 QNOTE: 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.9 x) D+ P; B5 R% }3 y* l
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