Current sensor and radio noise filter arrangement for use in transformerless photovoltaic inverter of e.g. power plant, has throttles provided with windings whose winding wire is connected around primary conductors by through-holes

摘要

The arrangement has a current sensor device (26) for acquiring electric current in primary conductors (19, 21). Radio noise filter devices (24) suppress electromagnetic interfering radiation by current-compensated throttles (31). Signal current transducers (32) and the current-compensated throttles are attached to each other. A winding wire of windings of the throttles is connected around other primary conductors by through-holes of the transducers. Another current sensor device forms an alternating voltage/direct voltage (AC/DC) sensitive fault current monitoring unit (53). The arrangement is made of plastic material and insulative material. The arrangement comprises a ring tape-wound cord made of amorphous nano-crystalline strip material.