Ensuring robust electrical surge protection is critical for safeguarding sensitive equipment, preventing costly downtime, and enhancing power quality. The UL 1449 standard is the definitive benchmark for surge protective devices (SPDs) in North America, categorizing them into distinct types based on installation location and capabilities. Understanding the differences between Type 1 SPDs, Type 2 SPDs, Type 3 SPDs, and component assemblies is [...]

When selecting between parallel or series connection methods for surge protectors (SPDs), the decision should be based on specific application scenarios and requirements. Both parallel and series connections are common configurations, each offering distinct advantages and suitable applications. Parallel Connection In a parallel configuration, multiple SPDs are connected simultaneously to the power lines of the protected [...]

Surge Protection Devices (SPDs) are critical components in safeguarding electrical systems from voltage spikes and surges. However, like any other device, SPDs can fail. Understanding the failure modes of SPD open-circuit and short-circuit—is essential for ensuring continuous protection and system reliability. Open-Circuit Failure in SPDs Open-circuit failure is a common mode of failure in SPDs, particularly [...]

impulse discharge current for class I test  imp The impulse discharge current passing through the device under test (SPD) is defined by the crest value Iimp, the charge Q and the specific energy W/R. The impulse current shall show no polarity reversal and shall reach Iimp within 50 µs. The transfer of the charge Q shall [...]

  ①High energy MOV technology Voltage limiting type SPD per IEC 61643 High energy AC/DC MOV is employed for PROSURGE’s class I, Class II and Class III AC/DC/PV SPD with compact size.   Advantage of MOV (Metal oxide varistor) *Higher lightning & surge current discharge capacity *Wide voltage range to cover AC/DC/PV application *Fast response *Wide [...]

Photovoltaic power generation is another renewable clean energy besides wind power generation, and is widely used in various countries and regions. It has the characteristics of simple installation, scalability, stability, and long life. Lightning strikes and surges are also a major disaster for photovoltaic power generation systems. Prosurge provides a comprehensive and efficient lightning protection solution [...]