Insulators. In general, the type and material of the insulators shall be selected based on the characteristics of the zones that cross the lines, taking into consideration the good practices and experiences of the transmission lines built in Peru and in similar zones. In this regard, the Concession Holder shall investigate what contaminating agents or potential sources of contamination are present in the zone, which may affect the insulators’ operation. The insulation coordination studies shall comply with standards IEC 60815-1 and IEC 60815-2, in particular with regard to contamination From the results of this research, the measures to minimize the impact of contamination, such as the use of glass insulators with silicone liner, line section layout, increase of creepage distance, use of equipotential rings to improve the performance of insulators contaminated in wet areas, etc., shall be determined. The insulators of 220 kV lines shall be selected from the tempered glass or porcelain types, with a homogeneous structure and standard and/or anti-mist (fog) type, with forged steel or galvanized malleable iron metal parts, provided with lock pins manufactured with corrosion- resistant material. The insulator chains shall be comprised of the number of units required to ensure a suitable creepage length according to a) the contamination level of the areas crossed by the lines, b) their altitude above sea level and c) the maximum voltage level of the system. Similarly, these chains shall ensure the insulation level required against atmospheric surges, switching surges and industrial frequency surges, for the same altitude conditions previously discussed and the insulation level defined in section 2.2.4 of this annex. The number of insulators to be considered per suspension chain -based on the altitude and voltage level of the facilities- is the one indicated as a reference below, which shall be assessed in the Pre-Operability Study: Altitude Units per suspension chain 220 kV
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Insulators. In general, the type and material of the insulators shall be selected based on the characteristics of the zones that cross the lines, taking into consideration the good practices and experiences of the transmission lines built in Peru and in similar zones. In this regard, the Concession Holder shall investigate what contaminating agents or potential sources of contamination are present in the zone, which may affect the insulators’ operation. The insulation coordination studies shall comply with standards IEC 60815-1 and IEC 60815-2, in particular with regard to contamination contamination. From the results of this research, the measures to minimize the impact of contamination, such as the use of glass insulators with silicone liner, line section layout, increase of creepage distance, use of equipotential rings to improve the performance of insulators contaminated in wet areas, etc., shall be determined. The insulators of the 220 kV lines shall be selected from the tempered glass or porcelain types, with a homogeneous structure and standard and/or anti-mist (fog) type, with forged steel or galvanized malleable iron metal parts, provided with lock pins manufactured with corrosion- corrosion-resistant material. The insulator chains shall be comprised of the number of units required to ensure a suitable creepage length according to a) the contamination level of the areas crossed by the lines, b) their altitude above sea level and c) the maximum voltage level of the system. Similarly, these chains shall ensure the insulation level required against atmospheric surges, switching surges and industrial frequency surges, for the same altitude conditions previously discussed and the insulation level defined in section 2.2.4 2.3.4 of this annex. The number of insulators to be considered per suspension chain -based on the altitude and voltage level of the facilities- is the one indicated as a reference below, which shall be assessed in the Pre-Operability Study: Altitude Units per suspension chain 220 kVkV Up to 1000 m.a.s.l. 17 In the case of structures with greater angles, end fittings and anchoring, the chains shall use one (01) insulator in addition to the ones used in the suspension chains. The Concession Holder is in charge of establishing the technical characteristics of the insulators that will be used in the lines, in such a way they ensure the appropriate insulation levels; however, as a reference, the use of insulators with the following characteristics has been envisaged: Characteristics Value Type of insulator Fog Insulating material Tempered glass Manufacturing standard IEC -60305 Disc diameter 255 mm Spacing per insulator 146 mm Creepage distance length 445 mm Breaking load 120 kN In all cases, the proper mechanical strength of the insulators shall be verified, in accordance with the work conditions they are subjected to; evaluating, if necessary, the use of double chains or insulators with a greater breaking load.
Appears in 1 contract
Samples: SGT Concession Contract
Insulators. In general, the type and material of the insulators shall be selected based on the characteristics of the zones that cross the lines, taking into consideration the good practices and experiences of the transmission lines built in Peru and in similar zones. In this regard, the Concession Holder shall investigate what contaminating agents or potential sources of contamination are present in the zone, which may affect the insulators’ operation. The insulation coordination studies shall comply with standards IEC 60815-1 and IEC 60815-2, in particular with regard to contamination contamination. From the results of this research, the measures to minimize the impact of contamination, such as the use of glass insulators with silicone liner, line section layout, increase of creepage distance, use of equipotential rings to improve the performance of insulators contaminated in wet areas, etc., shall be determined. The insulators of the 220 kV lines shall be selected from the tempered glass or porcelain types, with a homogeneous structure and standard and/or anti-mist (fog) type, with forged steel or galvanized malleable iron metal parts, provided with lock pins manufactured with corrosion- resistant material. The insulator chains shall be comprised of the number of units required to ensure a suitable creepage length according to a) the contamination level of the areas crossed by the lines, b) their altitude above sea level and c) the maximum voltage level of the system. Similarly, these chains shall ensure the insulation level required against atmospheric surges, switching surges and industrial frequency surges, for the same altitude conditions previously discussed and the insulation level defined in section 2.2.4 2.3.4 of this annex. The number of insulators to be considered per suspension chain -based on the altitude and voltage level of the facilities- is the one indicated as a reference below, which shall be assessed in the Pre-Operability Study: Altitude Units per suspension chain 220 kVkV Up to 1000 m.a.s.l. 17 In the case of structures with greater angles, end fittings and anchoring, the chains shall use one (01) insulator in addition to the ones used in the suspension chains. The Concession Holder is in charge of establishing the technical characteristics of the insulators that will be used in the lines, in such a way they ensure the appropriate insulation levels; however, as a reference, the use of insulators with the following characteristics has been envisaged: Characteristics Value Type of insulator Fog Insulating material Tempered glass Manufacturing standard IEC -60305 Disc diameter 255 mm Spacing per insulator 146 mm Creepage distance length 445 mm Breaking load 120 kN In all cases, the proper mechanical strength of the insulators shall be verified, in accordance with the work conditions they are subjected to; evaluating, if necessary, the use of double chains or insulators with a greater breaking load.
Appears in 1 contract
Samples: SGT Concession Contract
