Wye-Delta:
Interesting post.
First I would like to know how you measure the resistance to ground and how you achieve a maximum of 2 ohms ground resistance.
Since there are so many variables involved in soil conditions ie, 'Average Resistivity' which is measured in (Ohm-CM) and these values are highly dependant on moisture content, temparature and soil conductivity itself. In other words the resistivity is that of the electrolyte in the soil.
You asked about putting an OCPD in the neutral. When a system has only one source of power(generator or transformer), grounding may be accomplished by connecting the source neutral to earth directly or througth a neutral impedance. Providing a switch or circuit breaker to open the neutral circuit is NOT recommended. It is not desirable to operate the system ungrounded by having the ground connection open while the generator or transformer is in service.
WOC
