Technical Support

Surge Protective Devices (SPD) Degradation    Surge Protective Devices (SPDs) are critical for safeguarding electrical and electronic systems against transient overvoltages caused by...

Lightning Protection Grounding vs. Electrical Grounding Grounding systems are indispensable for modern electrical infrastructure, serving as the critical pathway for dissipating fault curren...

SPD Wiring and Installation Requirements under IEC, UL, and Regional Standards 1.Introduction to SPD Standards and Wiring Significance Surge Protective Devices (SPDs) serve as critical s...

What is a Surge Protective Device? A Surge Protective Device (SPD) is a sophisticated engineering solution designed to safeguard electrical systems from transient overvoltages caused b...

Determination of Reference Voltage and Temporary Overvoltage (TOV) in SPD Type Test 1. Definition and Determination of Reference Voltage (UREF) The reference voltage (UREF) is a critical...

Surge Protective Device Selection Guide: Compliance with UL 1449, IEC 61643, and BS EN 62305   Surge Protective Devices (SPDs) are essential for safeguarding modern electrical and electro...

Advantages of 3PN Surge Protective Device(SPD) Over 4P SPD in Low-Voltage Systems In low-voltage AC distribution systems, surge protective devices (SPDs) play a critical role in safeguarding...

REPSUN DTD technology  integrates the fuse thermal disconnector and mechanical disconnectors inside surge protective devices. The patented technology contributes to ...

All System Earthing Arrangements (SEA) provide equivalent protection of life and property. However each has certain advantages and inconveniences in other terms that may be important for a given ins...

A variety of documents deal with the subject of surge protective device installation: for example in France, standard NF C 15-531 focuses on the installation rules of LV surge protective d...