ABSTRACT
This chapter deals with power system protection alternatives and explains types of voltage disturbances identified in the key report. It describes effects of power-system configuration on incidence of computer failures. The power-conditioning system provides high-quality output waveform to the load, regardless of the level of noise and/or distortion present at the AC input terminals. The motors designed to start with a load have starting pole face windings that provide starting torque comparable to that of an induction motor. The ferroresonant transformer core is designed so that the secondary section is magnetically saturated at the desired output voltage. There are two basic types of noise signals with which transformer designers must cope: Increasing the physical separation of the primary and secondary windings will reduce the resistive and capacitive coupling. A better solution involves shielding the primary and secondary windings from each other to divert most of the primary noise current to ground.
