A switching device facilitates access, repair, maintenance of the device during operation in a electrical substation, and minimizes real estate and equipment in the electrical substations. The flexible wiring board is fabricated in the following manner. The composite material includes conductive particles at least partially embedded in an elastomeric layer that have no relative orientation and are disposed within the elastomeric layer for electrically connecting the first set and second set of conductors in the z direction under application of sufficient pressure there between. The test panel can cooperate with the noise reduction headphone to form a coupling cavity in the test. This estimation can then be used in calibrating package stress from pressure measurements. The resolver further includes a controller which outputs angle information at a zero cross point of the output signal detected by the rotary transformer.