PSP1 Dry Run Protection Monitor

PSP1 Dry Run Protection Monitor


Protects against dry running
No external sensors
Maintenance free
Alternative alarm functions
Easy to install
PSP1 Monitor Datasheet


Product Description

Running a centrifugal pump dry often causes severe damage resulting in repair costs and unexpected downtime. The Crest PSP1 PSP1 Dry Run Protection Monitor provides permanent protection against a pump running dry by electronic monitoring, meaning no intrusive probes are required. This makes the PSP1 ideal for Crest pumps built to handle aggressive and corrosive liquids.

The Crest PSP1 monitor is connectedly directly to the drive motor cable and constantly monitors the true power consumption of the motor drive and displays this as a percentage (%kW). When the pump runs dry, the motor load decreases, the relay operates and the PSP1 initiates an alarm and/or stops the pump. Three phase electric motors of any current rating can be monitored. Currents greater than 8 Amps also require an external current transformer.

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Technical Data

Alarm System

The monitor is provided with an alarm setting which can be set to the normal working range of the pump. The Crest PSP1 is equipped with a delayed tripping function to eliminate spurious alarms caused by temporary variations in flow. It can also be connected to the process PLC’s and cataloging systems.