Title :
Selection of varistor for surge protection purposes based on their voltage-current characteristic
Author :
Siegert, R. ; Mohammed, Osama A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Florida Int. Univ., Miami, FL, USA
Abstract :
The use of metal-oxide varistors in surge protection modules for telecommunication systems was evaluated. For this purpose, the definition of the device model and its voltage-current characteristics were defined and analyzed in detail. A high voltage impulse generator was developed to generate double exponential currents, in order to recreate the effects of indirect lightning strikes and switching overvoltages. As a result, an experimental setup was developed to record the time response of different nonlinear protective devices. This paper describes the voltage-current characteristics of small packaged varistors and the relation between numerical simulation results and the data recorded from the actual impulse testing of such devices. Additionally, it is intended to be used by engineers and system designers as an initial approach for selecting the adequate nonlinear protective device for telecommunication systems
Keywords :
impulse testing; lightning; overvoltage; pulse generators; surge protection; switching; telecommunication equipment; varistors; double exponential currents generation; high voltage impulse generator; indirect lightning strikes; metal-oxide varistors; nonlinear protective devices; surge protection; switching overvoltages; telecommunication systems; time response; varistor; voltage-current characteristic; voltage-current characteristics; Impulse testing; Lightning; Numerical simulation; Packaging; Surge protection; Surges; Telecommunication switching; Time factors; Varistors; Voltage;
Conference_Titel :
Southeastcon 2000. Proceedings of the IEEE
Conference_Location :
Nasville, TN
Print_ISBN :
0-7803-6312-4
DOI :
10.1109/SECON.2000.845460
