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以下引自IEC 60065-2005
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, m! i; Q+ p$ O& {) ?7 y3 W6 C11.2.5 Windings
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( ]0 D$ d* Q3 U/ e! _% x% P; G n4 {The temperature rise of windings shall not exceed the values given in Table 3, items b) and d)$ A, S2 A" s5 u7 h% i
"Fault conditions", with the following exceptions.
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" i9 I8 o% A6 q$ F– 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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6 Y F) L6 u# H- E- Z T3 x( rIn 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.* ?. o9 i: y U4 d, \
2 R, G+ g! c9 z% [– 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./ _6 n) @0 r2 p8 i/ c
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. - Q0 Q* A u' f+ I) i
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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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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.; b# n* }; e- \+ A; g: N4 C: C
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