Current transformer with a housing, a shunt circuitry and an output connector

摘要

A current transformer 100 or an electric current measuring system comprises one or more magnetic cores 130a-c enclosed within a housing 105 and arranged to receive a magnetic field from a cable or busbar extending through respective apertures 110a-c in the housing 105. The transformer 100 has one or more secondary windings140a-c wrapped around at least a portion of at least one of the magnetic cores 130a-c and provides an output signal at a connector120. Shunt circuitry 152, located within the housing 105, is connected across the secondary windings 140a-c to generate respective voltage output signals. The transformer 100 may be a single or three phase arrangement and the shunt circuitry 152 may include one or more resistors connected in parallel. The output signal connector 152 may be an RJ45 connector socket. The connector 152 and the shunt circuitry may be mounted on a circuit board 150 which is located within the housing 105. The current transformer 100 may be connected to a measurement device to form a current measuring system. The current transformer 100 may assist in the quick, cheap and safe installation of such a transformer.