|
|
lxxcumt 发表于 2015-8-7 15:30 
( z' t7 D" c( P! p首先提出以下条款要求:/ f i1 a! o# l! `. a2 H
8.4.1 * PATIENT CONNECTIONS intended to deliver current
% J" t" R2 ~& V, eThe limits specifie ... / {7 B9 r r, A% F5 T
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。3 ?! o1 l1 s% [+ O1 C# X
9 ]' N. v6 A. n) R/ N- H) H) r
再说一下对于第2点的异议:
& J. R& z# ?9 g( nstandby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)
, n. s- C" x& L A) \: J! zAPPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the
- [9 d" H, h$ S" Z& t: s; hME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE2 M7 v9 M' S# h5 W! x" J
CURRENT flows if an unintended voltage originating from an external source is connected to
0 K8 I! a* z6 @4 Lthe 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。/ k' e# W& N2 ]+ e* d) L- s+ z J
|
|