The SE-325 Neutral-Grounding-Resistor Monitor is used on resistance-grounded systems up to 25 kV to monitor the integrity of the neutral-to-ground path and to detect ground faults. It measures current and voltage in a transformer or generator neutral-to-ground connection and continuity of the neutral-grounding resistor (NGR). The SE-325 coordinates these three measurements to detect a loose connection, corrosion, ground fault, or NGR failure, and provides one alarm or trip output contact.

Features & Benefits:

 

• Continuous NGR monitoring: Detects resistor failure within seconds, reduces transient-overvoltage risk, removes risk of ground-fault-detection failure
• Ground-fault Detection: Main or backup protection to detect a ground fault anywhere on the monitored system
• Adjustable pickup (0.5 - 4 A): Select greatest sensitivity without false operation
• Adjustable time delay (0.1 - 2 s): Adjustable trip delay allows system coordination
• Output contacts: Form A output contact
• Selectable contact operating mode: Selectable fail-safe or non-fail-safe operating modes allows connection to s

Documents and Downloads

Document	File Type	File Size	Download
SE-325 SERIES Datesheet	PDF	354 KB