We are pleased to announce a partnership with Dossena

Dossena is an Italian based manufacturer opened in 1962 as an electrical panel manufacturer. In 1972 the company began focusing on the development of electronic products for electromechanical applications.

In 2009 the DER3 series was born with integrated LCD and innovative colour change that makes maintenance and use intuitive.

The differential relays with separate toroid of the DER3 series can be used on TT and TN type LV AC networks.

They allow for adequate selectivity and differential protection thanks to the wide adjustment of the leakage current threshold (0.03 ÷ 30A) and the tripping delay threshold (instantaneous ÷ 5 seconds).

The DER3s comply with the strict regulations in force (IEC 60947-2: 2019) thus satisfying a double need: the safety of the system and continuity of service.

– type A / AC

– 1 trip thresholds (Trip) with 1 output contact (NO-C-NC)

– continuous check of the correct functioning of the opening coil

– continuous check of the correct functioning of the D series toroidal transducer

– led display

– self-diagnosis with LED problem description