FAQ
How do I choose a PV AC SPD?
You should select the SPD according to AC system voltage, grid type, pole configuration, discharge current, protection level, and installation location. Common systems include single-phase and three-phase AC power networks.
What type of AC SPD is used in PV systems?
Most PV AC systems use Type 2 SPDs. If the site has an external lightning protection system or high direct lightning risk, Type 1 or Type 1+2 SPDs may be required at the main AC entrance.
Do I need an AC SPD if I already have a DC SPD?
Yes. DC SPDs protect the PV string and inverter DC input, while AC SPDs protect the inverter output and grid-connected side. Both sides can be affected by surge voltage.
Where should PV AC SPDs be installed?
PV AC SPDs are usually installed at the inverter AC output panel, AC combiner cabinet, main distribution board, or grid connection point. The installation position depends on the PV system design and cable distance.
What is a PV AC SPD?
A PV AC SPD is installed on the AC output side of the photovoltaic inverter to protect the grid-connected AC power system from surge voltage. It helps protect inverters, AC distribution panels, meters, and downstream electrical equipment.
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The product range includes production technologies for smart capacitors, digital display meters, surge protectors, dedicated backup protection devices for surge protectors, self-resetting over/under-voltage protectors, control and protection switches, and automatic transfer switches for dual power supplies.
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