注意看2iso应用的标准中讲的谁可以触摸安全低电压,这个才是关键.
主要我们的产品是低频理疗器，应用部分（导线+电极贴片）和电路板是有电气连接的，换句话说就是如果打下耐压，电池弹簧和应用部分是导通的（最多能承受50v），我想此设备就是一个基本绝缘，企业标准没有将B-a列入。而只做B-d。不知道这样合不合适？
说句实在话,lz不要生气哈:你的思路实在是乱...建议你画画绝缘图就清晰了.
有几个问题你要考虑:
1, 你的应用部件是哪一类的?B, BF,CF?
2. 参考电压是多少?
3. 电池是充电的还是一次性的,充电部分是内置的还是外置的adapter?
这样的理一下思路就能自己解决问题了,呵呵.
引用第11楼mystory1029于2008-10-17 10:27发表的:
主要我们的产品是低频理疗器，应用部分（导线+电极贴片）和电路板是有电气连接的，换句话说就是如果打下耐压，电池弹簧和应用部分是导通的（最多能承受50v），我想此设备就是一个基本绝缘，企业标准没有将B-a列入。而只做B-d。不知道这样合不合适？
引用第12楼artscan于2008-10-17 17:14发表的:
说句实在话,lz不要生气哈:你的思路实在是乱...建议你画画绝缘图就清晰了.
有几个问题你要考虑:
1, 你的应用部件是哪一类的?B, BF,CF?
2. 参考电压是多少?
3. 电池是充电的还是一次性的,充电部分是内置的还是外置的adapter?
.......
artscan你好，我在第一个帖子就明确了此产品是二类内部电源BF设备，4节5号普通干电池。要是充电的，或有adapter也许还真不这么困惑呢。有的时候产品越简单对照法规就越困惑。
这个肯定要加的.
第一,患者漏电流会超标.
第二,F型的话,会有要求按250V的工作电压做耐压测试,从应用部件打到可接触部分,你的样品一般通不过的.
还有一个CTl decision也不符合要求.
引用第14楼artscan于2008-10-20 11:46发表的:
这个肯定要加的.
第一,患者漏电流会超标.
第二,F型的话,会有要求按250V的工作电压做耐压测试,从应用部件打到可接触部分,你的样品一般通不过的.
还有一个CTl decision也不符合要求.
CTl decision也不符合要求的原因,可以在详述一下吗?
可以查查CTL decision 416.里面讲的比较明确了.
引用第15楼2iso于2008-10-21 05:05发表的:
CTl decision也不符合要求的原因,可以在详述一下吗?
同意artscan的看法
这个肯定要加的.
第一,患者漏电流会超标.
第二,F型的话,会有要求按250V的工作电压做耐压测试,从应用部件打到可接触部分,你的样品一般通不过的.
还有一个CTl decision也不符合要求.
附件是CTL decision sheet 416，大家讨论。
Question:
EQUIPMENT may contain floating circuits which under the definition 2.1.10 would not be
considered as LIVE, since contact with these parts could not result in excessive leakage
currents to earth or to other ACCESSIBLE PARTS. There would therefore appear to be no
requirements for safety separation between these circuits and ACCESSIBLE PARTS or
APPLIED PARTS. But voltages within these circuits or in conjunction with other circuits may
lead to currents exceeding the values given in Table IV.
Decision:
If the failure of insulation of such isolated circuits is likely to lead to a SAFETY HAZARD, such
insulation should be short-circuited before determining whether a part is LIVE. This shortcircuit
should not be treated as a SINGLE FAULT CONDIT ION unless the insulation
concerned satisfies the requirements for BASIC or SUPPLEMENTARY INSULATION
necessary for the voltages within the isolated part.
Explanatory notes:
There are two possibilities for solving this problem. One is to change the definition of LIVE and
adopt the requirements for insulation accordingly. The second is to treat the separation of the
isolated circuits as subject to failure.
If one pole of the isolated circuit is short-circuited to earth (failure of insulation) then the other
pole becomes LIVE and the adequacy of the separation of this LIVE part under these
conditions may be assessed. If that separation is inadequate then it should be short-circuited
in turn to assess the separation on the other pole.
Since for an isolated circuit there may be two separate protective insulations (on either pole),
each of these can be BASIC INSULATION rather than BASIC and SUPPLEMENTARY
INSULATION. Of course other combinations may be used although if the insulation of one
pole is less than BASIC INSULATION then the other pole must have DOUBLE or
REINFORCED INSULATION.
有高人给指点一下此ctl决议么
