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lxxcumt 发表于 2015-8-7 15:30
( G$ _4 Z3 ?1 k首先提出以下条款要求:
. a% Y' w$ l$ g8.4.1 * PATIENT CONNECTIONS intended to deliver current, F( { R5 F$ X8 `% U5 i) q3 W d
The limits specifie ...
6 `3 j$ _* }2 n9 S% g p3 a) L首先纠正一下对于8.4.1的理解:功能电流确实没有限值要求,但是需要注意电流路径。对于FES,在激活输出时,功能电流是在各电极之间流动。漏电流是有要求的,只是测试时不要求激活输出,在standby情况下还是适用于通标中的漏电流限值要求。9 X. O9 ^. p* |2 c1 G
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再说一下对于第2点的异议:6 p# Z. b! k7 N5 r5 V8 z5 a
standby的情况下,还是需要控制漏电流。首先功能电流是在指定频率范围内,50Hz/60Hz/DC频率的漏电流对人体还是有危害,不可混为一谈。既然专标定义为F型应用部分,那就都需要满足F type applied part的要求。首先看一下F type applied part的定义:“F-TYPE ISOLATED (FLOATING) APPLIED PART (herein F-TYPE APPLIED PART)8 K' k2 e; ]( J/ H9 ]5 s: f5 r( O
APPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the5 M1 t" X/ {% J
ME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE$ ]8 ^5 M3 e7 M3 `" `* ]( g5 ~
CURRENT flows if an unintended voltage originating from an external source is connected to/ c( C; v& a# w/ I# J3 C3 A
the PATIENT, and thereby applied between the PATIENT CONNECTION and earth”。 其实本质要求还是floating from earth. 内部供电的设备本身就是floating from earth的,这并不矛盾。
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