Introduction
Reliable electrical systems are vital for industrial facilities, commercial properties, data halls, and electricity supply stations. Lightning bolts and fluctuations during switching operations can harm delicate equipment, stop work processes, and expose to electrical dangers.
Knowledge of the distinct characteristics of the 10/350 µs surge wavelength and that of the 8/20 µs one is important for the selection of devices that protect equipment against voltage spikes (SPDs). These types of waveform are responsible for voltage surge processes and are essential for the introduction of effective lightning protection systems.
Understanding 10/350 µs and 8/20 µs Surge Waveforms
The 10/350 µs waveform represents a lightning impulse current with a 10 µs front time and a 350 µs time to half value. It is used to test Type 1 SPDs designed to handle partial lightning currents. Its longer duration represents a higher charge transfer and specific energy than an 8/20 µs impulse at the same peak current.
The 8/20 µs waveform has an 8 µs front time and a 20 µs time to half value. It is commonly used to test Type 2 SPDs against induced lightning surges and switching transients.
Type 1 SPDs are typically installed at electrical service entrances where partial lightning currents may occur. Type 2 SPDs are commonly installed in distribution boards to limit transient overvoltages affecting connected equipment.
About LPES International
LPES International is a company that specializes in engineering and offers all solutions related to lightning protection systems, surge protection systems, grounding systems, and earthing systems. The company provides all services related to lightning risk assessment, consultation on technical issues, and protection designs using AutoCAD.
Why Choose LPES International
Engineering Knowledge: Knowledge of lightning currents, surge signals and electrical protection needs.
Tailor Made Solution: Protection design according to site conditions and technical specifications of equipment.
A Compliance Oriented Approach: Engineering that meets IEC standards and the requirements of a project.
High Quality Materials: Discussion of utility of tested protection devices.
Technical Advice: Assistance in selecting surge protective devices, coordinatingsystems and planning effective protection.
Key Lightning Protection Solutions
Lightning Protection Systems externally: Design of air terminations and the down conductors which enable lightning to be intercepted and channels it to ground.
Surge Protection Devices: Coordination of Type 1, Type 2, and Type 3 SPDs where required.
Earthing and Grounding Systems: Provision of engineering to dissipate fault current and lightning current effectively.
Equipotential Bonding: Connections made for the purpose of minimizing hazardous voltages.
Lightning Risk Assessment: Calculation and drawing of protection schemes.
