Improperly detected and interrupted ground-faults can present
the risk of fire hazards in solar PV arrays. Excess current flow,
including reverse current from adjacent strings, to faulted
strings can overload conductors and/or connectors leading to
overheating and risk of fire. Faulted strings can also negatively
impact maximum power point tracking, ultimately affecting the
efficiency and power output of the PV array. To properly protect
PV arrays from damage, National Electric Code Article 690.5(A)
specifies that the GFPD or system must be capable of detecting
a ground-fault current, interrupting the flow of fault current and
providing an indication of the fault. Mersen offers a variety of
solutions and technical expertise to protect against ground-fault
incidents in PV arrays. For more information visit ep-us.mersen.
com.