Detecting unbalance and overloads with thermal imagers

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Detecting unbalance and overloads with thermal imagers

机译：使用热像仪检测不平衡和过载

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Electrical unbalance can be caused by several different sources - a power delivery problem, low voltage on one leg, or an insulation resistance breakdown inside the motor windings. Even a small voltage unbalance can cause connections to deteriorate, reducing the amount of voltage supplied, while motors and other loads will draw excessive current, deliver lower torque and fail sooner. A severe unbalance can blow a fuse, reducing operations down to a single phase. Meanwhile, the unbalanced current will return on the neutral, causing the utility to fine the facility for peak power usage.

机译：电气不平衡可能由几种不同的来源引起-供电问题，一只脚的电压低或电动机绕组内部的绝缘电阻击穿。即使很小的电压不平衡也会导致连接质量下降，从而降低供电电压，而电动机和其他负载将消耗过多的电流，产生较低的转矩并更快地发生故障。严重的不平衡会熔断保险丝，从而将操作降低到单个阶段。同时，不平衡电流将返回中性点，导致公用事业公司对设施进行罚款，以使用峰值功率。

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《Electrical Engineering》 |2005年第10期|p.21|共1页
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正文语种 eng
中图分类电器;电机;
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Detecting unbalance and overloads with thermal imagers

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