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标准定义如下:
$ Q' J7 s/ N% }% L6 c/ ?CLASS 2 TRANSFORMER – A transformer that has a 30 V rms maximum secondary potential
/ K) ~, l; ?8 O. F* V1 ]! ?# ?under any condition of loading.
( L& q; @- b; o. ]* jNote: The impedance within an inherently-limited transformer limits the current output to a particular maximum value.
7 Q2 S8 @' I7 A' q3 P% dMaximum power is limited by winding impedance (inherently limited) or by overcurrent protection (not-inherently limited).6 Z' ]' v$ d, Z% }
It may or may not be provided with a thermostat or other temperature sensitive device to limit its maximum temperature.
4 I8 g2 }: ? d4 C2 G8 AA not-inherently limited Class 2 transformer is provided with overcurrent protection to limit the maximum power output. |
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