Standard No.:	GB/T 18802.351-2019
English Name:	Components for low-voltage surge protective devices—Part 351:Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)
Chinese Name:	低压电涌保护器元件 第351部分：电信和信号网络的电涌隔离变压器（SIT）的性能要求和试验方法
Chinese Classification:	K30    Low voltage apparatus in general
Professional Classification:	GB    National Standard
ICS Classification:	29.240.10 29.240.10    Substations. Surge arresters 29.240.10
Issued by:	SAMR; SAC
Issued on:	2019-12-10
Implemented on:	2020-7-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	12500 words
Price(USD):	375.0
Delivery:	via email in 1~5 business day

本部分详细说明了用于确定和验证SIT电涌参数的试验电路和试验方法，并给出了关键性能的参数优选值。电涌隔离变压器(SIT)用作信号电压峰峰值不大于400 V的信号变压器。SIT是内部绕组有或没有屏蔽的变压器，其额定冲击耐受电压大于预期共模电涌环境的峰值电压。SIT是适用于对雷电的间接和直接效应或其他瞬态过电压的电涌进行防护的元器件。SIT用于抑制共模电压电涌向前传播。