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标准定义如下:) _4 H; y2 I i6 z- @0 \6 W+ D1 E: G, S
CLASS 2 TRANSFORMER – A transformer that has a 30 V rms maximum secondary potential) c, _7 i% o. g3 m
under any condition of loading.
+ f' [, b1 e) H9 g) }2 DNote: The impedance within an inherently-limited transformer limits the current output to a particular maximum value.) g* R1 p" s5 C$ e5 `
Maximum power is limited by winding impedance (inherently limited) or by overcurrent protection (not-inherently limited).
7 c$ z, W6 B C6 A7 l2 M, EIt may or may not be provided with a thermostat or other temperature sensitive device to limit its maximum temperature.- D7 _# `/ y9 }4 e' u) f2 H, F( C1 x
A not-inherently limited Class 2 transformer is provided with overcurrent protection to limit the maximum power output. |
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