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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 wil...

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 levelparameter th...

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 accord...

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 pho...

High energy MOV technologyVoltage limiting type SPD per IEC 61643High energy AC/DC MOV is employed for Eprotek’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 ...

SPDs shall at least be installed as close as possible to the origin of the installation.*For protection against effects of lightning and against switching overvoltages, class II tested SPDs shall be used.*Where the structure is equipped with an external lightning protection system or protection agai...

impulse discharge current for class I test  impThe 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 trans...

Understanding OCPD SelectivityWhat Is OCPD Selectivity?Selectivity refers to the proper coordination between overcurrent protective devices so that only the affected device trips during a fault, leaving other parts of the system operational. If one or both of OCPD is a circuit breaker, then the...

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 SPDs—open-circuit and short-circuit—is essential for ensuring continuous protection and system ...

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.Paral...