Ottotecnica for over 50 years has been designing and manufacturing devices and instruments for the protection from the electrical risk in the: - electric distribution LV-MV-HV - railway traction - subway, tramway, trolley-bus way traction for almost twenty years Ottotecnica has been working in the redaction of the national and international CEI and IEC-TC 78 standards concerning the earthing and short circuit devices, insulating tubes and voltage detectors.