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UL507风扇标准中关于风扇的扇叶有如下要求:! h! D0 G2 T2 d% t& x
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.) `% C; p- w# Y. i
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:
7 [9 @" d& u2 S" b( u 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:
: K- f: Y, h# c; A+ o7 G其中例外1“For all motor types except skeleton or open frame”是指哪种电机?
+ I6 A/ Y/ @1 f4 a$ i/ P 例外2“For bobbin-wound skeleton motors”又是指哪种电机。2 d/ d. Y, }& j( [/ W8 k
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。
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电机1( { |3 L( x4 I% L( `/ k/ i
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电机2/ G( S2 b; n. b9 r
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