Title :
Overvoltage protection in open air terminal and GIS in the 145 kV distribution system
Author :
Pryor, B.M. ; Richter, B.
Author_Institution :
Scottish Power plc, UK
Abstract :
The technical norm for surge arresters is nowadays the gapless metal oxide (MO) surge arrester. By manufacturing MO resistors with excellent long-term stability, with dimensions adopted to the energy requirements of the different system voltages, optimised designs for GIS surge arresters are available. The main advantages of GIS surge arresters compared with air insulated designs are their excellent behaviour under pollution conditions, their very high availability and their possibility to be integrated into SF6 substations for optimised equipment protection. However, air insulated designs (AIS) are for the time being more economic and may offer optimum solutions at GIS terminations
Keywords :
power distribution protection; 145 kV; GIS; SF6 substations; air insulated designs; distribution system; gapless metal oxide surge arrester; open air terminal; overvoltage protection; pollution conditions;
Conference_Titel :
Trends in Distribution Switchgear: 400V-145kV for Utilities and Private Networks, 1998. Fifth International Conference on (Conf. Publ. No. 459)
Conference_Location :
London
Print_ISBN :
0-85296-705-5
DOI :
10.1049/cp:19980755
