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标准定义如下:/ c' r* p y& A
CLASS 2 TRANSFORMER – A transformer that has a 30 V rms maximum secondary potential
4 H$ @4 e/ \, x% l% junder any condition of loading.8 Y" y. |4 ^ r
Note: The impedance within an inherently-limited transformer limits the current output to a particular maximum value.* [- v) g- N1 y4 x: J) g
Maximum power is limited by winding impedance (inherently limited) or by overcurrent protection (not-inherently limited).
/ C- p, c" f+ ]It may or may not be provided with a thermostat or other temperature sensitive device to limit its maximum temperature.- s/ |, W* D4 ]1 Z, y+ k& O4 `
A not-inherently limited Class 2 transformer is provided with overcurrent protection to limit the maximum power output. |
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