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发表于 2007-9-4 20:00
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引用第10楼seasunsky于2007-09-04 19:09发表的 :
是不是对某个公司的温控器有疑义?
那到不是,是一个论坛上见过几次的老问题,始终没有搞清.既IEC60335-1 (GB4706.1)16.2中泄漏电流规定限值可加倍的情况和为什么可以加倍?
我对比了GB4706.1各版的相关描述,均不相同。IEC335-1 1976版和第1、2、3、4、5、6号修改件没有看到。只有把已有材料摘录如下:
GB4706.1-84(IEC335-1:1976)
(无此描述)
GB4706.1-1992: (IEC335-1:1976及第1、2、3、4、5、6号修改件)
如果属下列情况,上述规定值应加倍:
— 在器具中除热断路器、无“断开((off)”档位的温控器或无“断开((off)”档位的能量调节器以外,未装其他控制装置;
一 所有控制装置都有“断开(off)”档位并且其触点开距至少为3mm,并全极断开。
但对 II类器具,只有全部控制装置都有一个“断开((off)"档位并且每个电极都断开,其触点开距至少为3mm时,0. 25mA的值才可加倍。
Gb4706.1-1998:(IEC335-1:1991)
如果所有的控制器在所有各极中只有一个“断开”位置,则上面规定的值加倍。
如果为下述情况,上面规定的值也加倍:
——器具只有一个热断路器,没有其它控制器,或
——所有的温控器、限温器和能量调节器都没有“断开“位置,或
——器具带有无线电干扰滤波器(在这种情况下,断开滤波器时的泄漏电流应不超过规定的限值)。
GB4706 .1-2005(IEC60335-1:2004)
如果所有的控制器在所有各极中有一个断开位置,则上面规定泄漏电流限定的值增加一倍。如果为下述情况,上面规定的泄漏电流限定值也应增加一倍:
— 器具上只有一个热断路器,没有任何其他控制器,或
— 所有温控器、限温器和能量调节器都没有一个断开位置,或
— 器具带有无线电干扰滤波器。在这种情况下,断开滤波器时的泄漏电流应不超过规定的限值。
IEC60335-1-1991
The values specified above are doubled if all controls have an off position in all poles. They
are also doubled if
– the appliance has no control other than a thermal cut-out or
– all thermostats, temperature limiters and energy regulators do not have an off position or
– the appliance has radio interference filters. In this case the leakage current with the filter disconnected shall not exceed the limits specified.
Iec60335-1-2001
The values specified above are doubled if all controls have an off position in all poles. They
are also doubled if
– the appliance has no control other than a thermal cut-out, or
– all thermostats, temperature limiters and energy regulators do not have an off position, or
– the appliance has radio interference filters. In this case the leakage current with the filter
disconnected shall not exceed the limits specified.
Iec60335-1-2004
The values specified above are doubled if all controls have an off position in all poles. They
are also doubled if
– the appliance has no control other than a thermal cut-out, or
– all thermostats, temperature limiters and energy regulators do not have an off position, or
– the appliance has radio interference filters. In this case the leakage current with the filter
disconnected shall not exceed the limits specified.
Iec60335-1-2006
The values specified above are doubled if all controls have an off position in all poles. They are also doubled if
– the appliance has no control other than a thermal cut-out, or
– all thermostats, temperature limiters and energy regulators do not have an off position, or
– the appliance has radio interference filters. In this case the leakage current with the filter
disconnected shall not exceed the limits specified.
比较以上各版,再对照IEC60335-1,1991及以后各版描述并无变化。
那么这段文字究竟什么意思?而规定的道理何在?(这已不仅是文字讨论!)
还请各位讨论,指教! |
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