Abstract—High accuracy is required from devices operating
in the measuring and protection systems of transmission lines
during the transformation of signals. Their immunity to external
fields is very important because it has a direct influence on the
proper functioning of the protection system. In this paper, the electromagnetic
current-to-voltage transducers, with coils designed
and manufactured using a multilayer high-density interconnect
printed-circuit board technology, are presented. The analysis of
the influence of the external magnetic field caused by other devices
on the proper functioning of the current-to-voltage transducer
has been presented. The analysis of the electromagnetic-field distributions
has been carried out using the 3-D field-circuit method
based on the finite-element numerical method. The magnetic-field
distributions and the induced secondary voltages for several
different applications have been presented. The results have been
compared with tests of real-life models.
Index Terms—Electromagnetic fields, finite-element analysis,
printed circuits, protection systems, transducers.