EXTENDING MOTOR LIFE WITH UPDATED THERMAL MODEL OVERLOAD PROTECTION

被引：0

作者：

Ransom, Daniel L. ^{[1
]}

Hamilton, Randy ^{[1
]}

机构：

[1] Basler Elect Co, Highland, IL 62249 USA

来源：

2012 RECORD OF CONFERENCE PAPERS INDUSTRY APPLICATIONS SOCIETY 59TH ANNUAL IEEE PETROLEUM AND CHEMICAL INDUSTRY TECHNICAL CONFERENCE (PCIC) | 2012年

关键词：

Motor protection; thermal model; RTD; emergency start; transducers;

D O I：

暂无

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Thermal issues shorten motor life. Modern motor relays must protect for these effects, which can occur for motors from small to large (50 HP and greater), and for all voltage operational levels. However, being too conservative on thermal limits decreases motor productivity. An ANSI/IEEE 49 thermal element creates a realistic thermal model of the motor because the element takes the load level and negative-sequence currents into account. The 49 thermal element is superior to older methods using inverse-time overcurrent elements (51). This paper discusses updates in the existing 49 thermal model implementation. Also discussed are resistance temperature detector (RTD) biasing, resistance temperature detector voting and the role of transducers in the modern motor relay.

引用

页数：7