Motor or pump vibration trips.

Excessive vibration in a motor/pump is symptomatic of a problem that can cause further damage or deterioration. If ignored, the results are higher maintenance and downtime. In some situations, it could also lead to safety concerns.

Vibration sensors or accelerometers can be installed to detect abnormal vibration levels. Alarm trips can monitor the vibration sensors and provide a local trip source for the motor. These pumps can be installed in many different environments so Class I, Div 2/Zone 2 certification and wide ambient temperature specs for these alarm trips are key characteristics.

If necessary, the vibration levels can also be retransmitted back to the control system using the Analog Output signals from the alarm trips.

The Moore STA Functional Safety Limit Alarm Trip logic solver is shown in the diagram which is IEC61508 certified. If the loop isn’t part of a safety instrumented system (SIS) where a standard alarm trip will do, then their SPA2 Programmable Limit Alarm Trip would be a great alarm trip choice.

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