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以下引自IEC 60065-2005
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11.2.5 Windings
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0 x' N7 I9 P3 }0 I: k) o4 a+ IThe temperature rise of windings shall not exceed the values given in Table 3, items b) and d) C+ v, p/ K q ^
"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.- B+ [* @4 C( u, i1 z' p5 C, a
. t; Y7 N: E- g, w! TIn 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.& {2 A9 H# k0 X6 C( J7 L$ v# z
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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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$ R+ P: C$ E, E. h1 y3 z/ 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.
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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." { ?2 q+ `" p0 w3 c, I0 b
; v5 P6 \6 `+ h. H# J% ~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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