Dold Measuring Relays for Main Monitoring

DOLD measuring relays for main monitoring feature a wide measurement range, adjustable response values, switching delay, and hysteresis. These relays enable early detection of network and voltage disturbances in both single-phase and three-phase networks.

Network monitoring relays monitor overvoltage and undervoltage, voltage ranges, phase symmetry, and phase sequence. The measurement functions can be easily adjusted using the rotary switches on the front of the relay.

These relays can be used to monitor phase networks in various applications, such as machinery, power plants, control systems, and buildings.

Key Features:
• Versatile range of monitoring and measurement relays
• Predictive detection of phase disturbances during system operation
• Accurate monitoring of various measurement values
• Wide measurement ranges
• No need for a separate auxiliary voltage
• Functions easily selectable via rotary switches
• Available with UL certification