The D series toroidal current transducers, designed to work with the DER3, DER3B DUAL and DER3B MED differential relays, detect zero-sequence/differential currents dispersed towards earth. In addition to the normal leakage current measurement winding, they are also equipped with a test winding.
The transducers must be installed upstream of the line or loads to be protected and monitored. All the active conductors (phase and neutral) of the single-phase or three-phase lines must pass inside.
Advantages of purchasing:
Wide range capable of satisfying every need.
Core in special ferromagnetic alloy very sensitive to currents dispersed towards earth
Housing in self-extinguishing CL V0 plastic material
Withstand short circuit current 80KA for 0.5 seconds
IP20 protection rating
Operating temperature from -10°C to +50°C.
Two windings: one for measurement (500 turns) and one for test (100 turns)
Easy installation (panel bottom and/or Din rail mounting)
Reference standard: IEC 61869-2