High quality Surge Protective Device is offered by leading China manufacturer Wzonpa. It is engineered to safeguard electrical power systems against transient over-voltages caused by lightning strikes, switching operations, and electromagnetic interference. Designed specifically for renewable energy environments, including solar and wind power applications, our SPD portfolio (such as the APBU2-PV series for photovoltaic systems) ensures stable and reliable protection for sensitive DC networks in compliance with IEC 61643 standards.
Modern solar farms, wind turbines, and battery energy storage systems operate in highly exposed environments. Without proper protection, even minor surge events can lead to:
· Inverter failure or downtime
· Insulation degradation in DC cabling
· Control system malfunction
· Reduced system efficiency and lifespan
The Wzonpa durable Surge Protective Device is built with high-energy protection architecture and precision engineering to meet demanding industrial requirements.
Core technical advantages include:
· Parallel-connected high-energy metal oxide varistors (MOVs) for efficient surge discharge
· Optimized thermal disconnectors and fault indicators for enhanced safety
· Protection against both common-mode and differential-mode surges
· Nanosecond-level dynamic voltage clamping response
· Coordinated energy management across multi-stage protection systems
· Environmental durability for -40°C to +85°C operating conditions
· Galvanic isolation between protective and surge dissipation circuits
Proper installation is critical to achieving full protection capability. Wzonpa SPDs are recommended to be installed at both ends of long DC cable runs:
· At the solar array input side to intercept lightning-induced surges
· At inverter or converter terminals to suppress internally generated transients
The devices support DIN-rail mounting (35mm), making integration into combiner boxes, inverter cabinets, and DC distribution panels simple and efficient.
With a rated system compatibility of up to 1000V AC / 1500V DC, the Surge Protective Device ensures safe disconnection under fault conditions while preventing overheating and continuous overvoltage risks.
Our products are developed under strict quality and safety frameworks aligned with IEC 61643 standards. Each Surge Protective Device undergoes rigorous testing for:
· Partial lightning current discharge (Type 1 / T1 up to 25 kA 10/350 μs)
· Surge current handling (Type 2 / T2 exceeding 40 kA 8/20 μs)
· Thermal stability and fault isolation performance
· Utility-scale solar power plants
· Wind turbine converter systems
· Battery energy storage systems (BESS)
· Industrial DC distribution networks
