What is the best NGR monitoring solution?
Electrical codes define minimum requirements for electrical installations. Higher levels of safety and protection are permitted – NGR monitoring is recommended for every resistance-grounded electrical system.
Bender NGRM500 and NGRM700 Neutral-Grounding-Resistor Monitors provide all three required protective functions defined by the Code—a ground fault in the current-carrying conductors, a shorted NGR, and an open NGR. They will detect a ground fault even when the NGR has failed open. Beyond the code requirement, these protective relays can detect a broad frequency range of ground-fault current, including DC faults, providing protection unrivaled in the industry.
Ground-fault and resistor-fault functions are separable with three sets of output contacts, allowing choices of tripping and alarming characteristics. The NGRMs are easily configured through backlit display, dynamic pushbuttons, and the webserver interface. System alerts are immediately available with locally indicated alarms with LED and audible warnings and communicated through the standard network interface.
Every impedance-grounded installation deserves to be protected by a Bender NGRM500 or NGRM700 Neutral-Grounding-Resistor Monitor.
For more information about this application or to learn more about Bender technology related to your specific application, contact our team of experts.
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