Measuring relays for voltage monitoring

Device and system protection in the event of poor quality of the electrical grid

The DOLD measuring relays for voltage monitoring offer complete voltage protection for overload and underload monitoring in one compact device. The underload and overload relays and voltage monitor (single phase and three phase) protect consumers such as electric motors against overloading caused by underloads and/or protect devices against destruction caused by overloads e.g. generators running in isolated operation with faulty regulation. An important area of use of this measuring relay is the single phase voltage monitoring in control circuits or DC control circuits.