The great advantage of these relays is that, by using the motor itself as a sensor and without requiring any external detectors, they control the load of the motor and stop it before a breakdown caused by dry running, cavitation or closed valve, occurs.
In this way, the need for awkward float switches is eliminated, therefore, saving time and money in their installation and maintenance.
- Prevention of dry running without float switches
- Protection of the motor against overloads with thermal memory
- Efficient protection against phase loss, phase imbalance and incorrect phase sequence
- With overvoltage protection in single-phase pumps