The best solution for a long life installation is a relay to control the over load or under load is the shaft power monitor and relay , RISH I
Shaft power monitor protects your pumps and other equipment against damage and downtime. Early warnings allow for preventive action, thus reducing maintenance costs and increasing reliability. Using the motor as a sensor also reduces installation costs.
The relay immediately detects over- and underload due to, for example, a pump running dry or a crusher jamming. A unique technique to calculate shaft power results in an accurate and reliable supervision across the whole load range.
