Common use of Autotransformers and Reactors Clause in Contracts

Autotransformers and Reactors. Autotransformers and reactors will be immersed in oil for outdoor installation, cooled by natural circulation of oil and air (ONAN) and ventilation (ONAF) with the following characteristics: Primary winding voltage 500 / √3 kV Secondary winding voltage 220 / √3 kV Tertiary winding voltage -- kV (*) Type Single-phase autotransformer Rated power per single-phase unit 250 MVA Rated power of the three-phase bank 750 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Primary winding voltage 500 / √3 kV 500 / √3 kV 500 / √3 kV Type Single-phase Single-phase Single-phase Rated power per single-phase unit 33 MVAr (**) 30 MVAr (**) 33 MVAr (**) Rated Power of the three-phase bank 100 MVAr (**) Plus one reserve unit 90 MVAr (**) Plus one reserve unit 100 MVAr (**) Plus one reserve unit Refrigeration ONAN ONAN ONAN Neutral connection Solid to earth Neutral reactor (**) Neutral reactor (**) Accessories Bushing type current transformers Bushing type current transformers Bushing type current transformers (*) (*) Final values will be defined by the Concessionaire and approved in the Preoperative Study by COES. (**) Number and size of components, as well as basic specifications of the reactive compensation equipment shall be defined by the Concessionaire and approved by COES-SINAC in the Pre-Operative Study. They will consist mainly of the following components:

Autotransformers and Reactors. Autotransformers and reactors will be immersed in oil for outdoor installation, cooled by natural circulation of oil and air (ONAN) and ventilation (ONAF) with the following characteristics: Primary winding voltage 500 / √3 kV Secondary winding voltage 220 / √3 kV Tertiary winding voltage -- kV (*) Type Single-phase autotransformer Rated power per single-phase unit 250 MVA Rated power of the three-phase bank 750 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Primary winding voltage 220 / √3 kV Secondary winding voltage 138 / √3 kV Tertiary winding voltage -- kV (*) Type Single-phase autotransformer Rated power per single-phase unit 33 MVA Rated power of three-phase bank 100 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Primary winding voltage 500 / √3 kV 500 / √3 kV 500 / √3 kV Type Single-phase Single-phase Single-phase Rated power per single-phase unit 33 MVAr (**) 30 MVAr (**) 33 MVAr (**) Rated Power power of the three-phase bank 100 MVAr (**) Plus one reserve unit 90 MVAr (**) Plus one reserve unit 100 MVAr (**) Plus one reserve unit Refrigeration ONAN ONAN ONAN Neutral connection Solid to earth Neutral reactor (**) Neutral reactor (**) Accessories Bushing type current transformers Bushing type current transformers Bushing type current transformers (*) (*) Final values will be defined by the Concessionaire and approved in the Preoperative Study by COES. (**) Number and size of components, as well as basic specifications of the reactive compensation equipment shall be defined by the Concessionaire and approved by COES-SINAC in the Pre-Operative Study. They will consist mainly of the following components:transformers

Autotransformers and Reactors. Autotransformers and reactors will be immersed in oil for outdoor installation, cooled by natural circulation of oil and air (ONAN) and ventilation (ONAF) with the following characteristics: Primary winding voltage 500 / √3 kV Secondary winding voltage 220 / √3 kV Tertiary winding voltage -- kV (*) Type Single-phase autotransformer Rated power per single-phase unit 250 MVA Rated power of the three-phase bank 750 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Primary winding voltage 220 / √3 kV Secondary winding voltage 138 / √3 kV Tertiary winding voltage -- kV (*) Type Single-phase autotransformer Rated power per single-phase unit 33 MVA Rated power of three-phase bank 100 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Primary winding voltage 500 / √3 kV 500 / √3 kV 500 / √3 kV Type Single-phase Single-phase Single-phase Rated power per single-phase unit 33 MVAr (**) 30 MVAr (**) 33 MVAr (**) Rated Power power of the three-phase bank 100 MVAr (**) Plus one reserve unit 90 MVAr (**) Plus one reserve unit 100 MVAr (**) Plus one reserve unit Refrigeration ONAN ONAN ONAN Neutral connection Solid to earth Neutral reactor (**) Neutral reactor (**) Accessories Bushing type current transformers Bushing type current transformers Bushing type current transformers (*) (*) Final values will be defined by the Concessionaire and approved in the Preoperative Study by COES. (**) Number and size of components, as well as basic specifications of the reactive compensation equipment shall be defined by the Concessionaire and approved by COES-SINAC in the Pre-Operative Study. They These will mainly consist mainly of the following components: