xiaojie786 发表于 2009-5-21 15:42

帮忙判定下灯具连接器的过电压类型，急！

请有相关经验的XDJM判定下使用在户外灯具上的连接器属于那种过电压类型，额定电压250V，额定电流16A，因为要确定脉冲电压，脉冲电压是根据过电压等级来选的！下面是过电压分类定义：

根据设备的使用条件，要求的长期持续电压运行等级，将直接由低压电网供电设备的过电压类别分为Ⅳ级。过电压类别Ⅳ级的设备是使用在配电装置电源端的设备，如电表和前级电流保护设备。过电压类别Ⅲ级的设备是安装在配电装置中的任务，以及设备的使用安全性和适用性必须符合特殊要求者，如配电装置中的开关电器。过电压类别Ⅱ级的设备是由配电装置供电的耗能设备，如家用和类似用途的负载。过电压类别Ⅰ级的设备是连接在将瞬态过电压限制在相当低水平的设备，如具有过压保护的电子电路上。对于不直接由低压电网供电的设备，必须考虑到系统设备可能出现的最高电压及各种情况的严重组合。

micshang 发表于 2009-5-26 00:22

个人理解为Ⅲ级即配电级

Equipment of overvoltage category III is equipment in fixed installations and for cases where the reliability and the availability of the equipment is subject to special requirements.
NOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation.

Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation.
NOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads.
If such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies.
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