NGRUS321 - NGRUS Series

Series: NGRUS
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High-resistance grounding prevents many of the problems that are associated with ungrounded and solidly grounded electrical distribution and utilization systems. High-resistance grounding can limit point-of-fault damage, eliminate transient overvoltages, reduce the arc-flash hazards, limit voltage exposure to personnel, and provide adequate tripping levels for selective current-based ground-fault detection and coordination. The Littelfuse Neutral Grounding Resistor System is a neutral grounding resistor (NGR), current transformer, and sensing resistor installed in a NEMA 3R enclosure used to high-resistance ground transformers and generators. The NGR system is designed for use with Littelfuse Neutral Grounding Resistor Monitors for complete system grounding and grounding protection. The NGR series – US systems are designed for use in US applications and all other parts of the world, not including Canada. For applications in Canada, please use the NGR series – Canada.

Property (Mouseover for details) Value
CT secondary current Amps 0.05
Input Voltage (V) 600
Input Current Range (A) 5
Input Impedance (Ohms) 69.4
Response Time (ms) Continuous
Sense Resistance (Ohms) ER-600VC
Mounting Method Floor Mount
built in CTs No
Frequency 60
NEMA Rating 3R; Weather Protected Sensing Resistor
Check Stock Yes
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