Lightning electromagnetic pulses (LEMP) and switching overvoltages pose a severe risk to the heart of the solar power plant operation: the expensive solar inverters operating on an 800VAC system. For the project investors, any downtime due to surge-related damage meant not only significant lost revenue but also exorbitant repair costs and operational delays.

The Challenge: Extreme Protection Demands for High-Voltage Solar Applications

The DC side of a PV plant presents a unique set of challenges for Surge Protective Devices (SPDs), requiring unparalleled performance and reliability:

High System Voltage: An 800VAC system demands an SPD with a correspondingly high maximum continuous operating voltage (Uc) and a low voltage protection level (Up).

Massive Energy Dissipation: Direct lightning strikes and induced surges can inject immense amounts of energy, requiring an SPD with superior discharge capacity.

Fail-Safe Operation: In the event of end-of-life or overload, the SPD must safely disconnect from the circuit to prevent fire hazards and ensure system safety.

The Solution: Prosurge’s BPS12.5/960-S/3PI Rises to the occasion

Here’s how the BPS12.5/960-S/3PI provided the answer:

Precise Voltage Matching: With a high maximum continuous operating voltage (Uc) of 960V, it is perfectly suited for 800VAC systems, providing stable protection without nuisance tripping.

Superior Surge Handling: An impressive maximum discharge current (Imax) of 65kA (8/20μs) per pole ensures that even the most powerful surges are safely diverted away from critical equipment.

Excellent Protection Level: Its low voltage protection level (Up) effectively clamps transient overvoltages, acting as a robust shield and ensuring a clean, safe operating environment for sensitive inverters.

Comprehensive Remote Monitoring: The built-in remote signaling contact (SC) allows the plant’s monitoring system to receive real-time status alerts (OK/Fault), enabling proactive maintenance and enhancing operational efficiency for unmanned sites.

Enhanced Safety Design: Equipped with a thermal disconnect mechanism, the device ensures safe disconnection from the circuit upon end-of-life or overload, eliminating fire risks and providing ultimate peace of mind.

Protected Revenue Stream: By preventing equipment damage and downtime, Prosurge SPDs directly safeguard the project’s return on investment.

Reduced Operational Costs: The high reliability and remote monitoring capabilities minimize the need for on-site inspections and maintenance, reducing the total cost of ownership.

Enhanced System Uptime: Provides a solid foundation for the long-term, stable, and efficient operation of the entire power plant.

Exceptional ROI: A minimal investment in high-quality protection prevents potential losses amounting to hundreds of thousands in equipment repair and revenue loss, delivering a remarkable return on investment.

Choose Prosurge, Choose Confidence

This successful project case reinforces that Prosurge Electronics is more than just a manufacturer; we are a reliable partner in system safety. In the renewable energy sector, we are committed to using cutting-edge technology and robust products to safeguard every watt of green power.

Product Model: BPS12.5/960-S/3PI
Ideal For: Lightning and surge protection for AC/DC power supplies in large-scale PV solar plants, wind farms, energy storage systems (ESS), and other new energy applications.