Design & installation of lightning protection systems

When a structure is subjected to a direct lightning strike, a strong electric current flows through it, causing extensive damage. Since the installation of lightning rods alone is not sufficient preparation, more comprehensive lightning protection measures are required.

The lightning protection system, which captures lightning and safely conducts it underground, the external lightning protection system, which controls the current of direct lightning strikes, and the internal lightning protection system, which prevents spark discharges through equipotential bonding, are combined to reduce fire and damage to buildings.

Even if a "lightning protection system" can prevent direct lightning strikes, it cannot prevent induced lightning or backdraft lightning. For perfect lightning protection, it is effective to install SPDs that can capture lightning surges such as abnormal voltage and overcurrents that flow inside the facility and safely discharge them into the ground.

The optimal SPD is selected and installed according to the area and the amount of lightning energy, and the lightning surges are discharged to prevent them from entering equipment.
Specifically, appropriate SPDs are selected for each target to be protected, such as DC systems, AC systems, and communication and control systems. SPDs are then installed in the vicinity of the lightning surge intrusion routes in each device to suppress overvoltages and protect equipment.

In order to operate power generation facilities in a favorable environment, "grounding consulting" is essential to protect people and facilities from electric shock and electrical leakage accidents.
Our lightning protection experts provide comprehensive support from grounding design and selection of construction methods to on-site support for construction work so that our customers can operate their valuable buildings with peace of mind.

We reduce the grounding resistance value to ensure the electrical grounding resistance value stipulated in the technical standards for electric power facilities. We also measure the earth resistivity of soil on site and use it as a standard for grounding design. In addition to measuring ground resistance using the voltage drop method and measuring and investigating stray current, we also investigate transient ground resistance values that cannot be measured with a ground resistance meter by measuring surge impedance.