Solidly grounded means connected to ground without inserting any resistor or impedance device. ... The main goal of solidly grounding a power system is to provide a low-impedance return path for short circuit current during a line to ground fault.

What is solidly grounding system?

A system is considered to be solidly grounded when its neutral is connected directly to a station ground or earth with no intentional impedance in that connection. Ground fault currents on solidly grounded systems are about equal to three-phase fault currents, and fuses or relays will operate satisfactorily.

Which voltage systems are solidly grounded?

Basic Power Systems - Solidly Grounded

Common examples are three- phase 208/120-V Wye or 480/277-V Wye configurations, as well as single-phase transformers with the secondary neutral connected to ground (in rare instances, corner-grounded delta).