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以下引自IEC 60065-2005
5 c9 F- v$ Y+ h6 ^(不好意思,误导你了,非常抱歉 [s:5])" i; L9 @+ E" ~
1 |8 e4 L1 t" R% @: Q% I$ K. Z: C(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
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& ]( b( y3 A1 xThe temperature rise of windings shall not exceed the values given in Table 3, items b) and d)
- Y& `6 n. s& u"Fault conditions", with the following exceptions.1 e7 Q# d: ]/ F# Q. ~
! S6 T0 t5 G/ A; X! {. X) B8 W– 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.
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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.
% u! ]% U b0 bNo failure is allowed. M8 x! t# \% e, t: z9 ?! P% _
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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.1 S m i6 k; z3 c3 A
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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.$ W: B+ z: i; g' ~" ^, y
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