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lxxcumt 发表于 2015-8-7 15:30 1 L$ n Q1 H6 L8 Z
首先提出以下条款要求:
) s, B. e- @! H% @8.4.1 * PATIENT CONNECTIONS intended to deliver current# {( N) m6 F& u; i' W& S! t
The limits specifie ...
1 s5 u) {% ~; H+ @* s, a. D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 A. @) Y$ N& B5 j3 S' H
- _7 V' z$ R6 `- a再说一下对于第2点的异议:
! }# i- f9 y: b7 k$ L @; Xstandby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)9 U% d. l5 d; h; \
APPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the% U/ ^. A' Z! J9 P5 U
ME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE
5 G# d, A; p9 g9 e" a1 E% J2 ~CURRENT flows if an unintended voltage originating from an external source is connected to0 J! S% e/ [ `5 g, l! `, F
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。: X$ O5 Q1 R a# J$ F
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