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lxxcumt 发表于 2015-8-7 15:30 ) a+ q2 m3 D( m3 G6 f
首先提出以下条款要求:
. q5 b* U% F" q# |0 N8.4.1 * PATIENT CONNECTIONS intended to deliver current
9 z& N$ ?7 ^/ b, h% Z9 CThe limits specifie ... : m* x. b: r% r& ? q; a8 R+ y
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。4 N4 x, `6 D7 u, G4 u: u7 M
+ ~) Q: K4 h; Q再说一下对于第2点的异议:6 v+ E" n; f% G+ y6 b
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)
3 H3 L/ ?# t% `APPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the7 M. p9 R! `& r7 L: f3 I& f& ~* M, m
ME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE# k) \- ~0 @$ \
CURRENT flows if an unintended voltage originating from an external source is connected to
8 |/ e& r; e. N/ T% f: z/ s8 Nthe 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。) j" T6 @- h+ z3 m# M0 N
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