Patent ID: 9190829
Filing Date: 2015-11-17
Classification: G06F,H02H,H04M

Abstract:
1. A method for selecting appropriate components for a surge protection circuit providing surge protection for a device, the method comprising: determining a highest peak voltage at input to the surge protector; selecting a gas discharge tube (GDT) having a first breakdown voltage greater than the anticipated highest peak voltage; determining an impulse voltage for the GDT, wherein the impulse voltage is the voltage required to excite the GDT based on the GDT's breakdown voltage; selecting a thermistor having a second breakdown voltage greater than an impulse voltage for the GDT; determining resistance of the thermistor at the impulse voltage for the GDT; computing an anticipated peak current of the thermistor, wherein the anticipated peak current is based on the impulse voltage for the GDT and resistance of the thermistor; and selecting a thyristor having a rated peak current greater than the anticipated peak current for the thermistor.