Lightning and Surge Protection
These electronic devices shield the field apparatus and the telecommunications setup against lightning attacks, transients or surges. The functionalities of these different surge protection devices vary with the design requirements: blocking/isolation, diverting or earthing. The selection of a model is based on the capacity, voltage levels, spark gap design and reliability. The complete series of surge protection devices are standardised with impulse voltage threshold and tested for basic insulation level. They are employed in industrial security, railway traffic and SCADA devices besides telemetry or power devices.