Transitional grounding impedance measuring device
Transitional grounding impedance measuring device Manufactured by Otowa Electric Industry, a specialist in lightning protection products, including SPDs, lightning arresters (such as arresters and surge protectors), lightning surge countermeasures, and induced lightning countermeasures.
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basic information
*Features* 1. Measures transient grounding resistance values (effective surge impedance*) that cannot be measured with a grounding resistance meter. Transient grounding resistance values (effective surge impedance) caused by lightning surges differ from steady-state grounding resistance values due to the influence of reactance and capacitance in the ground. It is important to measure grounding electrodes, such as those for lightning protection systems, transmission towers, and communication antenna bases, where surge currents flow, using a surge impedance meter. 2. Measurement can be performed without removing the overhead ground wire of transmission towers. 3. Compact, lightweight, and easy to operate. 4. Operational check with test resistance. A simple operational check can be performed to confirm whether this product can measure correctly. *Effective surge impedance refers to the value obtained by dividing the maximum voltage that appears when a current with a wavefront length of 1μs flows into the ground by the maximum value of the inflow current.*
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【Purpose】 Measuring transient ground resistance values (effective surge impedance) that cannot be measured with a ground resistance meter.
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Company information
OTOWA is the only manufacturer in Japan specializing in lightning protection, having explored "lightning" since its founding. We want to create a safe and secure society where people are not afraid of the natural threat of "lightning." We will realize this wish with our advanced lightning protection systems. ◆ A wide range of product lineup We offer a variety of products, including surge protectors for power distribution, as well as those for offices, factories, railway vehicles, and general households. We also accommodate custom orders, so please feel free to consult with us. ◆ Consulting for lightning protection Lightning protection varies depending on various conditions such as location. OTOWA will propose the most suitable lightning protection measures for those conditions. ◆ World-class "lightning" testing facilities Using top-class testing equipment and a variety of testing facilities, we conduct product evaluation tests and development in-house. Our achievements are highly regarded, and we also accept contract testing (Lightning Technology Center). ◆ Unique quality of zinc oxide devices We produce zinc oxide (ZnO) devices under strict management. These devices are the heart of surge protective devices (SPDs) and are essential for lightning protection.