摘要
接触式温度传感器应用于成套开关设备,其前端电源的获取是一个主要问题。笔者利用磁饱和原理,在开关柜母线上安装一电流互感器,使其铁心在小电流时正常励磁,大电流时磁饱和,并通过计算确定其尺寸,研制了满足功率和电压要求的前端电源,从而为后端的接触式传感器和温度在线监测系统提供了稳定、不间断的电源。
How to power the contact-type temperature sensor is a main problem for its application in high voltage switchgear. This paper introduces a method which utilizes magnetic saturation principle to solve the problem. A kind of current transformer is installed around the inside bus bar. It is excited normally when lower current passes through it; and saturated when higher current. Therefore, the dimensions of iron-core of current transformer can be calculated to meet the power supply requirement of the sensor at the front end, providing a stable power source for the subsequent circuit.
出处
《高压电器》
CAS
CSCD
北大核心
2004年第6期424-426,共3页
High Voltage Apparatus
关键词
开关设备
在线检测
磁饱和
互感器
switchgear
on-line monitoring
magneticsaturation
transformer
