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UL507风扇标准中关于风扇的扇叶有如下要求:3 i) f6 ~/ e3 Y
6.4.2 An impeller of polymeric material outside a motor shall not be located within 25.4 mm (1 inch) of an opening in the motor housing.
. o- s# s8 J. M. k Exception No. 1: For all motor types except skeleton or open frame, an impeller is not prohibited from being within 25.4 mm of an opening in the motor housing when:
' q0 \. f: Q9 e Exception No. 2: For bobbin-wound skeleton motors employed in a product other than ceiling-insert, wall-insert fans, or rangehoods, an impeller is not prohibited from being within 25.4 mm of the motor windings when:
5 s- {. P6 d$ S0 D6 ~& X: [+ `1 p其中例外1“For all motor types except skeleton or open frame”是指哪种电机?
4 ` g$ q( _* W* i9 s 例外2“For bobbin-wound skeleton motors”又是指哪种电机。
' T( w/ _* I7 q 我的风扇有串激的,也有罩激的,如图,谁能帮忙确定下,电机1和电机2分别适用哪条例外。% r6 ^/ y6 K$ o0 b x o
! T2 D& J3 X& y% }电机1
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! t" E! v- E* V4 ?# i电机26 s- z& }" S, [( e
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