具断相保护功能的电气设备起动器

申请公布号：CN2072288U

申请号：CN90215745.0

申请日期：1990.08.22

申请公布日期：1991.02.27

申请人：

刘先华

发明人：刘先华

分类号：H02H3/253;H02H7/09

主分类号：H02H3/253

代理机构：

长沙市专利事务所

代理人：栗朝虹

地址：422600湖南省绥宁联合造纸厂

摘要：一种在现有电气设备起动器基础上改进而成的具断相保护功能的电气设备起动器，既具有电气设备的起动控制功能，亦具有三相电源任意相断相自动保护功能。其特征在于：接触器C<SUB>1</SUB>接在三相电源的A、B二相上，接触器C<SUB>2</SUB>串接C<SUB>1</SUB>常开触点C<SUB>1</SUB>，启动按钮QA<SUB>1</SUB>、停止按钮TA<SUB>1</SUB>后，接在电源B、C相上。该起动器设计合理，电路构思巧妙，性能安全可靠。主要适于作各类电气设备的起动控制之用。

主权项：1、一种具断相保护功能的电气设备起动器，它包括按钮TA1、AQ1、接触器C2，其特征在于它还包括接触器C1，所述接触器C1线圈并接在三相电源的A、B两相之间；接触器C2线圈，接触器C1常开触点C1′，常闭按钮TA1、常开按钮QA1依次串接后并接在三相电源的B、C两相之间，且常开按钮QA1的两端亦并接有接触器C2的常开触点C2″，三相电源的A、B、C相与电气设备D之间串接有接触器C2常开触点C2′。

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