In a resistance grounding system, a resistor is connected from the source wye point to the ground with a grounding conductor for minimizing fault currents.
A hybrid resistance grounding (HRG) system is most suited in systems with medium-voltage  generators.
Panetta, "Advanced concepts in high resistance grounding," in Petroleum and Chemical Industry Technical Conference (PCIC), 2012 Record of Conference Papers Industry Applications Society 59th Annual IEEE, pp.
Tenders are invited for new arc resistant switchgear (main switchgear) with equipment enclosure, equipment foundation for main switchgear, new connections to existing ameren transformers, new low resistance grounding
system, replacement of medium voltage variable frequency drives (vfd~s) in pump station no.
The code which implements the methodology set out in the paper allows on the basis of the relevant electrical measurements to evaluate not only the resistance of the grounding of electrical devices, but also as its own and mutual resistance grounding
all the electrodes in a three-electrode setup measuring the resistance of the grounding device.
However, high resistance grounding does not protect against phase-to-phase faults.
That's one reason why mines have adopted high resistance grounding, in which the neutral point is connected to ground through a resistor (see Figure 2) of value sufficient to limit ground fault current to a few amperes, generally 25 A or less, although a 5 A limit is typical.
When the high resistance grounding fault occurs at the fault point F1, the fault component current differential protection and zero-sequence current differential protection are correct to operate, but segregated phase current differential protection refuses to operate.
When the high resistance grounding fault occurs at the fault point F4, segregated phase current differential protection and fault component current differential protection refuse to operate.
High resistance grounding
solutions to address critical fault conditions
This Project Will Be Performed At Plant 2 To Provide Monitoring And Control The Switchgear Breakers, Monitor And Control Automatic Transfer Switches (ats), And Monitor The Status And Alarms Of Switchgear And Standby Generator Battery Chargers, High Resistance Grounding
, Standby Generators, Standby Generator Fuel Tanks, Standby Generator Day Tanks, 12.47-kv To 4160-volt Or 480-volt Transformers, And Uninterruptible Power Supplies (ups).