Common use of Insulators Clause in Contracts

Insulators. In general, the type and material of the insulators will be selected according to the characteristics of the areas crossed by the lines, taking into account the good practices and experiences of previous transmission lines built in Peru in similar areas. In that sense, the Concessionaire must research those contaminants or potential sources of contamination existing in the area that could affect the performance of the insulators. Based on the results of the research, it is necessary to determine the measures minimizing the impact of the contamination, such as: use of silicone insulated glass insulators, layout of the line routing, increase of the leakage line, use of equipotential rings improving the performance of contaminated insulators in wet areas, etc. 500 kV and 220 kV line insulators shall be evaluated between between homogeneous, standard, anti-fog tempered or porcelain glass, with forged steel or malleable galvanized iron, provided with locking pins made of corrosion-resistant material. Insulator chains will be made up of the necessary number of units to ensure adequate leakage length according to the level of contamination of areas through which the lines cross, their altitude above sea level and the maximum voltage level of the system. Similarly, these chains must guarantee the required insulation level against surges of atmospheric surges, switching undervoltages and overvoltages at industrial frequency, for the same previously mentioned altitude conditions and the levels of insulation defined in section 2.2.5 of this Annex. The number of insulators to be considered by suspension chain, according to altitude and facility voltage level, which will be evaluated in the Pre-Operative Study, is the following: Altitude Units per suspension chain In the case of larger angle, terminal and anchor structures, the chains will use an additional (01) insulator to those used in the suspension chains. The Concessionaire will establish the technical characteristics of insulators to be used in the lines, in such a way as to ensure adequate insulation levels; however, as a reference, the following are required insulator characteristics: Characteristics Value Type of insulator Fog Insulating material Tempered glass Manufacturing standard IEC -60305 Disc diameter 330 mm Spacing per insulator 146 mm Leakage line length 440 mm Breaking load 160 kN In all cases adequate mechanical insulator strength must be verified, according to the working conditions to which they are subjected, if necessary, evaluating, the use of double chains or insulators with higher breaking load.

Insulators. In general, the type and material of the insulators will be selected according to the characteristics of the areas crossed by the lines, taking into account the good practices and experiences of previous transmission lines built in Peru in similar areas. In that sense, the Concessionaire must research those contaminants or potential sources of contamination existing in the area that could affect the performance of the insulators. Based on the results of the research, it is necessary to determine the measures minimizing the impact of the contamination, such as: use of silicone insulated glass insulators, layout of the line routing, increase of the leakage line, use of equipotential rings improving the performance of contaminated insulators in wet areas, etc. 500 kV and 220 kV line insulators shall be evaluated between between homogeneous, standard, anti-fog tempered or porcelain glass, with forged steel or malleable galvanized iron, provided with locking pins made of corrosion-resistant material. Insulator chains will be made up of the necessary number of units to ensure adequate leakage length according to the level of contamination of areas through which the lines cross, their altitude above sea level and the maximum voltage level of the system. Similarly, these chains must guarantee the required insulation level against surges of atmospheric surges, switching undervoltages and overvoltages at industrial frequency, for the same previously mentioned altitude conditions and the levels of insulation defined in section 2.2.5 2.2.9 of this Annex. The number of insulators to be considered by suspension chain, according to altitude and facility voltage level, which will be evaluated in the Pre-Operative Study, is the following: Altitude Units per suspension chain In the case of larger angle, terminal and anchor structures, the chains will use an additional (01) insulator to those used in the suspension chains. The Concessionaire will establish the technical characteristics of insulators to be used in the lines, in such a way as to ensure adequate insulation levels; however, as a reference, the following are required insulator characteristics: Characteristics Value Type of insulator Fog Insulating material Tempered glass Manufacturing standard IEC -60305 Disc diameter 330 mm Spacing per insulator 146 mm Leakage line length 440 mm Breaking load 160 kN In all cases adequate mechanical insulator strength must be verified, according to the working conditions to which they are subjected, if necessary, evaluating, the use of double chains or insulators with higher breaking load.