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标准定义如下:$ X* w( p5 A2 M f& D/ k
CLASS 2 TRANSFORMER – A transformer that has a 30 V rms maximum secondary potential
1 q8 J0 X/ d' H' e# Cunder any condition of loading.% T I2 T, e1 q) @! A& {
Note: The impedance within an inherently-limited transformer limits the current output to a particular maximum value.
2 A( Z ^& R9 ~Maximum power is limited by winding impedance (inherently limited) or by overcurrent protection (not-inherently limited).& N$ `' S9 Z+ C- z) k
It may or may not be provided with a thermostat or other temperature sensitive device to limit its maximum temperature.5 t8 c+ _4 C, q; v! E+ Y2 n
A not-inherently limited Class 2 transformer is provided with overcurrent protection to limit the maximum power output. |
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