FAQ
What information is needed to select PV SPD?
You need to provide PV system voltage, inverter type, combiner box design, grounding system, installation environment, and whether the project has an external lightning protection system.
Can CRESIN provide SPD solutions for 1500V solar PV systems?
Yes. CRESIN can provide PV surge protective devices suitable for high-voltage solar PV systems, including 1000V and 1500V DC applications.
What is the difference between Type 1 and Type 2 PV SPD?
Type 1 PV SPD is used where direct lightning current may enter the system, especially in exposed installations or systems with external lightning protection. Type 2 PV SPD is used to protect against induced surges and is common in most PV applications.
Do solar PV systems need both DC SPD and AC SPD?
Yes. The DC side protects PV strings and inverter DC inputs, while the AC side protects the inverter output and grid-connected distribution system. A complete PV surge protection design usually includes both sides.
What voltage should I choose for solar PV SPD?
The voltage rating should match the maximum DC voltage of the PV system. Common PV SPD voltage ratings include 600V DC, 1000V DC, 1200V DC, and 1500V DC.
Where should SPD be installed in a solar PV system?
SPD is usually installed on the DC side of the inverter, in the PV combiner box, and on the AC output side of the inverter. For larger PV plants, SPD may also be installed in distribution cabinets and monitoring systems.
What is a solar PV surge protective device?
A solar PV surge protective device is designed to protect photovoltaic systems from transient overvoltage caused by lightning strikes, induced surges, or switching operations.
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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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