Earthing System for Solar PV Power Plant
i. The photovoltaic modules, BOS and other components of power plant requires
adequate earthing for protecting against any serious faults as guided by IEC 60364.
ii. The earthing system shall be designed with consideration of the earth resistivity of
the project area. The earth resistivity values shall be measured prior to designing
the earthing system. Unless otherwise specified, earthing system shall be in
accordance with IS: 3043 and IEEE 80, Indian Electricity Rules, Codes of practice
and regulations existing in the location where the system is being installed.
iii. The permissible system fault power level at 22kV also shall be kept in consideration
while designing the earthing system. Each array structure of the PV Yard, LT power
system, earthing grid for switchyard, all electrical equipment, control room, PCU, All
junction boxes, ACDB & DCDB etc., shall be grounded properly as per IS 3043 -
1987. All metal casing/shielding of the plant shall be thoroughly grounded in
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