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标准定义如下:
9 x" c, V C) DCLASS 2 TRANSFORMER – A transformer that has a 30 V rms maximum secondary potential; B8 D1 E6 g8 n" O9 I, @
under any condition of loading.
. m- _* F( O% I3 ]8 l7 sNote: The impedance within an inherently-limited transformer limits the current output to a particular maximum value.5 t! @. \, T0 @, x9 l, X) r
Maximum power is limited by winding impedance (inherently limited) or by overcurrent protection (not-inherently limited).8 x3 z% `. ?2 f1 i+ J4 `8 v
It may or may not be provided with a thermostat or other temperature sensitive device to limit its maximum temperature.
+ o5 k8 {2 W$ b' l% jA not-inherently limited Class 2 transformer is provided with overcurrent protection to limit the maximum power output. |
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