The object of the invention is to provide a slotted current acquisition coil according to the Rogowski principle in which the printed circuit board base of the measuring coil can be opened to insert an electrical conductor to be measured without having to interrupt the latter. To this end, the two printed...http://www.google.de/patents/US20030137388?utm_source=gb-gplus-sharePatent US20030137388 - Printed circuit board-based current sensor
