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标准定义如下:6 y# E! m, b, T* B4 \
CLASS 2 TRANSFORMER – A transformer that has a 30 V rms maximum secondary potential$ N3 Y- Q# d8 l( A
under any condition of loading.; n7 z& p2 n4 R' J6 `6 z( S+ y
Note: The impedance within an inherently-limited transformer limits the current output to a particular maximum value.
0 p8 X6 ~! k) t3 qMaximum power is limited by winding impedance (inherently limited) or by overcurrent protection (not-inherently limited).1 D# L. x2 P# P& O; K: s
It may or may not be provided with a thermostat or other temperature sensitive device to limit its maximum temperature.) H3 n: [/ o, g0 G; |
A not-inherently limited Class 2 transformer is provided with overcurrent protection to limit the maximum power output. |
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