随着家用电器的日益增多,触电、失火等事故也在增多,严重地威胁着人民生命财产的安全。因此,在抓好工业用电安全的同时必须抓好和重视民用电的安全。目前民用电存在着下列问题:1.缺乏系统的完善的保护措施,目前的几种保护方式均存在着一定程度的缺陷。(1)接零保护式:即用电器金属外壳与零线短接,其存在问题是由于某种原因电源进线的相线与零线接反时,用电器外壳带电。这种情况是很多的。房屋的修缮、改建,公用电度表的更换装修等,均可能造成相零线接反。例如今夏有一四层住宅楼的一户居民反映,去年购买的一台电风扇运行正常,今年突然严重麻手,不敢使用。经 With the increasing number of household appliances, accidents such as electric shock and fire are also increasing, which seriously threaten the safety of people’s lives and property. Therefore, we must do a good job in industrial electricity safety at the same time must pay attention to civilian safety and attention. At present, there are the following problems with civilian power: 1. The lack of systematic and comprehensive protection measures, the current number of protection methods are there is a certain degree of defects. (1) then zero protection: that is, with electrical appliances metal shell and shorted to zero, the problem is that for some reason the power into the line phase and zero line reverse, with the electrical shell charged. This is a lot of situations. Housing repair, alteration, replacement of public watt-hour meters, etc., may result in phase zero line connected. For example, a resident of a four-storey residential building in the summer reflects the normal operation of an electric fan purchased last year. This year, he suddenly became severely haggard and was afraid to use it. through