For decades, facilities have been burdened by the inability of traditional UL-1047 Isolated Power Systems and Line Isolation Monitors (LIM) to assist in determining which devices or circuits are causing faults and sending the LIM into alarm. Often, this would result in hours (if not days) of facilities troubleshooting to determine the root cause resulting in downtime of the operating room, rescheduling procedures in the process.

Bender engineers have developed a solution capable of immediately identifying which circuits contribute to a ground-fault on an isolated power system. Our fully automated ON-LINE ground-fault location systems (EDS Series) are designed to reduce operating room downtime and provide efficient troubleshooting, resulting in potential facilities savings of thousands of dollars per year. Find the faulty device and circuits within seconds.

In the illustration, we show a resistive ground fault occurring on Circuit No. 2 of the Isolated Power System. When this occurs, the LIM measures the resulting change in system impedance, calculates the THC, and displays a “Hazard” message. Next, the LIM generates a tracer pulse that is detected by the current sensors. Seconds later, the EDS evaluates the signals detected by the current sensors and indicates exactly which circuit has the fault locally on its display. The information is then transmitted via the systems (RS-485) communication bus and displays a message in plain text on a remote indicating device.