About Photovoltaic support grounding test specifications
This report provides field procedures for testing PV arrays for ground faults, and for implementing high-resolution ground fault and arc fault detectors in existing and new PV system designs.
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6 FAQs about [Photovoltaic support grounding test specifications]
What is a solar substation grounding guide?
Abstract: This guide is primarily concerned with the grounding system design for photovoltaic solar power plants that are utility owned and/or utility scale (5 MW or greater). The focus of the guide is on differences in practices from substation grounding as provided in IEEE Std 80.
What is the purpose of the grounding system design guide?
Scope: This guide is primarily concerned with the grounding system design for ground-mount photovoltaic (PV) solar power plants (SPPs) that are utility owned and/or utility scale (5 MW or greater). The focus of the guide is on differences in practices from substation grounding as provided in IEEE Std 80.
What are equipment grounding requirements for PV systems?
Equipment grounding requirements for PV systems are covered in 690.43. These requirements include the bonding and grounding requirements for exposed metal parts of PV systems such as metallic module frames, electrical equipment, and conductor enclosures [690.43 (A)].
How do you test a photovoltaic array ground fault?
Photovoltaic array ground fault equipment can be tested either by staging a fault within the array or by injecting a simulated fault signal into the GFDI. A staged fault would require connecting the array to ground at some intermediate point through a variable resistor.
How do you test a grounding system?
Using a “Megger Null Balance Tester” or equivalent, measure the resistance of the grounding system with respect to ground (earth). Representative locations on the array and array structure, and of the system grounding should be tested. The ground grid resistance should be 25 Ω or less.
Where should a grounded PV system conductor be grounded?
The location where grounded PV system conductors must be grounded is covered in 690.42. It states that a grounded PV array must be grounded at the ground-fault protection device—and at no other location.