|
以下引自IEC 60065-2005
! I7 I, L0 {3 n4 t" o' T2 I(不好意思,误导你了,非常抱歉[s:5])
: }* k' N5 q. l, p2 p, v+ P; C3 c4 @% x! G B y$ x
(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。)
9 [ J, U/ T) Z2 j6 n6 o3 r. z& Q
& z+ i' _, T8 ?7 G11.2.5 Windings1 r; a" L7 E( d$ y+ p
D7 m& R6 k8 p9 Z5 o
The temperature rise of windings shall not exceed the values given in Table 3, items b) and d)
+ S1 O: t4 C- l+ g$ ^0 L! ?' j; ?"Fault conditions", with the following exceptions.
0 Z9 k& K7 D. c- P$ n" d! L1 l/ W5 m3 D0 E
– 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.
! y: @. s" r4 B
& \8 H8 ?1 R( J2 O2 |$ \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.9 _* ` b8 p" r9 c
8 D; X ^$ }; ~) S% U
– 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., p8 | I) I+ v
) R+ W$ H, B1 E
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.
* B' n5 L. t( s4 K! o# hNo failure is allowed.3 Q4 q- [! ]% O! b: x+ I
' W! z U# b+ r% ~" [: e– 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.
0 n/ h7 ], Q4 I/ y/ ] u( g9 s
– 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.. D0 {3 r; j# Q4 N
* z& B: P6 h: ?. E0 F0 W0 l
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.
" k5 j9 v5 k1 Y Q
0 V. i* z, j4 ]% a& b/ x2 W1 M' K, x4 G4 D( @6 J
( H1 _7 a! w0 [ L' ]
+ v" B0 b: d# K3 ` |
|