Function

Application

Phase sequence

• Direction of rotation of the drive

Phase failure

• A fuse has tripped
• Failure of the control supply voltage
• Broken cable

Phase asymmetry

• Overheating of the motor due to asymmetrical voltage
• Detection of asymmetrically loaded networks

Undervoltage

• Increased current at a motor with corresponding overheating
• Unintentional resetting of a device
• Network collapse, particularly with battery power

Overvoltage

• Protection of a plant against destruction due to overvoltage