标题: 帮忙判定下灯具连接器的过电压类型，急！ [打印本页] 作者: xiaojie786 时间: 2009-5-21 15:42 标题: 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： 2 Q- b: \! F8 a( d/ |5 @/ D8 T/ _% [) r/ H4 |' I- a4 o8 k2 h
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。作者: micshang 时间: 2009-5-26 00:22
个人理解为Ⅲ级即配电级 2 q% k) _/ u4 H2 T! [# `5 ?, Y5 ~. Z8 S
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.# }8 y7 ^3 Y# C1 E0 ]0 e
NOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation. r6 W* E7 ]4 u) Y. f$ R1 H/ |% |7 [3 X' q. v) x! c
Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation. * o4 v k9 x8 ~" D+ ANOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads.: D( f4 Z" A% Y6 k8 b) [/ H
If such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies.