ABSTRACT
This chapter develops an impedance ratio according to the following ideas. The circuit discussed here consists of a battery, a transmission line, and a switch. The pulse energy travels back at the same velocity and elevates each segment of the transmission line to full voltage. The selection criteria for the type of arrester, e.g., Transzorbs or transient voltage suppressor; Transzorb (TVS) diode and metal oxide varistor, are somewhat driven by the circuit application and will need to be carefully selected based upon the input power architecture, including any lightning or transient voltage requirements. In the single-phase balanced circuit, three TVS devices are required: one from hot to ground, one from neutral to ground, and one from line to line. The common-mode TVS devices protect the equipment from common-mode pulses—pulses from both lines to ground. The primary goal for using an arrester or TVS is to provide the lowest resistance shunt path to ground for the pulse current.
