ABSTRACT
Instrument transformers by coupling the primary circuits with secondary circuits, make the propagation of electromagnetic disturbances generated on their primary circuits possible. For the electronic devices and information technology equipment installed on the secondary circuits, instrument transformer is the source of disturbances. Electromagnetic couplings of an instrument transformer can also lead to the propagation of disturbances between structural elements. The disturbance signals in the primary circuits can appear as either common (CM) or differential mode (DM) currents. In the secondary circuits of instrument transformers, as of one of the terminals being always grounded, CM signals are equal to the DM ones. Apart from parasitic capacitances, the inductances and resistances of conductors which constitute the leads can be of considerable importance, similarly to parallel resistances representing the losses in insulating elements of the instrument transformer. The analyzer has a built-in tracking generator, enabling the generation of fixed value signals of wide frequency range.’
