HRG system advantages
Resistance grounding has several advantages over solid grounding:
These advantages are noted in IEEE Std 3003.1: Recommended Practice for System Grounding of Industrial and Commercial Power Systems, and its predecessor publication 142-2007, the Green book.
Solidly grounded systems are common, but they are susceptible to arc-flash hazards and uncontrolled shutdown due to ground faults. Low-resistance grounding is sometimes used for medium-voltage systems. Ungrounded systems are used in some industries and countries, and have some advantages including the ability to operate with a ground fault. Bender has monitoring solutions for each of these power system types.