Supplemental Ground Fault Monitors
Supplemental Monitors work together with existing protection to enhance electrical system safety and performance by monitoring its components. These monitors are designed for application-specific functionality such as insulation monitoring, ground continuity monitoring and resistor monitoring.
Ground-check monitors are used to detect problems in equipment ground conductors. Mobile equipment typically has an extra wire, sometimes called a pilot wire, routed with the phase and ground conductors. A monitor uses this pilot wire to send a signal down to the equipment to a unique terminating device. The signal then returns on the equipment ground conductor to the monitor.
The single most common reason for electrical system failure is insulation breakdown. Insulation monitors can be installed at any point in the system to detect a problem with the insulation. The monitor is connected to one phase and injects a dc signal to continuously measure the system’s insulation resistance.
