Features

These relays offer several key features:

• No level probes for detecting no-load operation.
• Suitable for three-phase motors from 1 to 630 A.
• Motor cables pass through the relay holes.
• Thermal memory models motor heating and cooling.
• Signal the cause of tripping.
• Adjustable reset time.

Applications

These relays are applicable in various applications, including:

• Submersible three-phase pumps
• Gasoline station pumps
• Other types of pumps
• Systems where no-load operation is critical (pump in vacuum, broken transmission belt, etc.)

Benefits

The main advantage of these relays is that they utilize the motor itself as a sensor without requiring any external sensors. They monitor the motor's current and stop it before costly damage occurs due to no-load operation, cavitation, etc.