Resolving Ground Relay Tripping

To assure critical power in many industrial and commercial facilities, medium voltage power is often switched between alternate sources, which sometimes results in transformer inrush current on phase relays and ground relays.  Where ground relay tripping occurs, personnel may solve the problem by increasing relay settings.  This increase, though, reduces the sensitivity of the relay, which reduces the likelihood of catching a fault online.

This white paper from Schneider Electric offers a solution to the problem of ground relay tripping through the use of power monitoring systems.  It demonstrates the methodology employed to correct this issue through a detailed real-world benchmark.  First, it identifies the problem and explains how inrush currents interact with residual circuits.  Next, it details current transformer saturation and how to utilize circuit monitors to alleviate the issue.  Lastly, it offers corrective actions to employ in your data center after the problems have been identified.

Learn the best practices for utilizing power monitoring systems in your data center.  Click here to download this white paper on resolving the issue of ground relay tripping.

To find other white papers on products and strategies for managing your data center, visit the Data Center Knowledge White Paper Library.