Rotating machinery are often subjected to damaging forces that lead to costly failures when abnormal operating conditions or minor faults go unnoticed. A problem as simple as dirt buildup on fan blades can result in huge centrifugal forces that are transmitted to the bearings resulting in inefficient operation and premature failure. These damaging forces, however, generate vibrations on the machinery that if monitored, can provide sufficient warning so that corrective action can be taken before catastrophic failure occurs. Vibration switches are often used to monitor vibrations and shutdown equipment before damage can occur. They are particularly popular for protection of cooling towers.
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