BLOW-OPEN FORCES ON DOUBLE-BREAK CONTACTS

被引：20
|
作者：
SHEA, JJ [1 ]
DEVAULT, B [1 ]
CHIEN, YK [1 ]
机构：
[1] EATON CUTLER HAMMER CORP,ASHEVILLE,NC
来源：
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY PART A | 1994年 / 17卷 / 01期
关键词：
ARCING; CONTACTS; BLOW-OPEN; GAS PRESSURE; J X B; RADIATION; IONIZATION; DOUBLE-BREAK; SHORT CIRCUIT;
D O I：
10.1109/95.296365
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Measurements were made on double-break contact geometries, commonly used in power distribution devices, to determine contact dynamics under various short circuit fault conditions. These measurements lead to a modification to improve contact dynamics during a short circuit. The modification consisted of a guide rod that prevented contact arm rotation during arcing. Contact dynamics depended on two blow-open forces, magnetic repulsion and gas pressure. Both forces were quantified for various double-break contact geometries along with arc voltage and contact travel. The gas pressure, created by arc energy, was found to be a significant blow-open force. Measured blow-open forces were compared to a sealed piston model to obtain an empirical equation for blow-open forces. Contact performance was also determined with and without the guide rod for a range of arc currents.
引用
收藏
页码：32 / 38
页数：7
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