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lxxcumt 发表于 2015-8-7 15:30
/ E- G2 I, j, @) Z首先提出以下条款要求:
' K C5 `/ e- C+ p& k. _' @1 k8.4.1 * PATIENT CONNECTIONS intended to deliver current
' U2 u* v; E! m! ]% \( A8 }The limits specifie ...
& V& w0 P! j/ i0 [* l5 W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。8 I4 i; n; A, V! U, k
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再说一下对于第2点的异议:
{, ]4 G( M' Q/ j( ?7 rstandby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)5 j. N. W/ A# g3 }' p7 X* N
APPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the
* T8 u. E2 `( r4 t8 W4 @0 T0 `ME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE
4 n4 j* m3 \; p& K/ aCURRENT flows if an unintended voltage originating from an external source is connected to
; |* y% U- Q. m( V' L3 ethe 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。6 ]! k9 v" ~ w
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