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 [...]
Surge Protection Device (SPD) is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. It is suitable for power supply systems with AC 50/60Hz and rated voltage of 220V/380V. The types and structures of surge protectors vary according to their different uses, but they can generally be classified in the [...]
Surge protectors, as an important protective device, play a crucial role in protecting equipment from surge currents. When choosing a surge protector, an important parameter is the Up value. So, do you really understand the Up value of a surge protector? Up: voltage protection level parameter that characterizes the performance of the SPD in limiting [...]
The grounding of lightning protection devices to prevent lightning overvoltage is usually referred to as lightning protection grounding. Lightning protection devices must have good grounding in order to effectively limit atmospheric overvoltage and scattered lightning currents. Below, the editor will popularize lightning protection and grounding knowledge for you, hoping to be helpful to you! Lightning [...]
Energy storage systems play a vital role in modern electricity grids, enabling the integration of renewable energy sources, improving grid stability, and providing backup power during outages. However, these systems are vulnerable to damage from power surges, which can occur due to lightning strikes, switching operations, or grid disturbances. Surge protection is essential for ensuring [...]
Surge protective devices (SPDs)are required to be tested under impulse discharge currents mainly with waveforms of 8/20 ms and 10/350 ms. However, with the improvement of SPD products, the performance and withstand capability of SPDs under such standard test currents need more investigation. In order to investigate and compare the withstand capability of SPDs under [...]
Lightning Protection Zone (LPZ) In IEC standard, terms like type 1/2/3 or class 1/2/3 surge protective device is very popular. In this article, we are going to introduce a concept that is highly related to the previous terms: lightning protection zone or LPZ. What is lightning protection zone and why does it matters? The lightning [...]
As we know, surge protective device will degrade or even come to end of life over time due to repeated small surges, a single strong surge or sustained overvoltage. And when surge protective device fails, it may create a short circuit condition and cause safety problem in the power system. Thus proper overcurrent protection device [...]
