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lxxcumt 发表于 2015-8-7 15:30 * [' T0 @8 A2 u( i3 ]7 W
首先提出以下条款要求:3 w) o8 i1 v, M4 _+ d6 A
8.4.1 * PATIENT CONNECTIONS intended to deliver current8 z b% {! l; K6 a: A Z: }* F
The limits specifie ...
" {% o& t# l: j8 n5 t0 b2 o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。+ H/ A5 Q: `, I* L ]3 C) e
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再说一下对于第2点的异议:# ^ _2 J. G8 q1 { ^
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 o+ p% O2 E; }( L5 c+ {& j
APPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the
1 o: M7 v1 ]; h- pME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE+ q4 t. a! f" E. b. x
CURRENT flows if an unintended voltage originating from an external source is connected to
& u4 p3 I7 S1 Vthe 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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