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: Autotransformers Description Nueva Huánuco 50/220 kV substation 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 three-phase bank 750 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Description Nueva Huánuco 220/138 kV substation 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 “Año del Buen Servicio al Ciudadano” Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Reactors Description Nueva Huánuco 500 kV substation Nueva Huánuco – Yanango TL Primary winding voltage 500 / √3 kV 500 / √3 kV Type Single-phase Single-phase Rated power per single-phase unit 33 MVAr (**) 30 MVAr (**) Rated power of three-phase bank 100 MVAr (**) Plus one reserve unit 90 MVAr (**) Plus one reserve unit Refrigeration ONAN ONAN Neutral connection Solid to earth Neutral reactor (**) Accessories 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. These will mainly consist 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: Autotransformers Description Nueva Huánuco 50/220 Yanango 500 / 220 kV substation SS Primary winding voltage 500 / √3 kV Secondary winding voltage 220 / √3 kV Tertiary winding voltage -- kV (*) Type Single-phase autotransformer “Año del Buen Servicio al Ciudadano” 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 Description Nueva Huánuco 220/138 kV substation 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 “Año del Buen Servicio al Ciudadano” Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Reactors Description Nueva Huánuco Yanango 500 kV substation SS Nueva Huánuco Yanango – Colcabamba TL Nueva Yanango – Carapongo TL 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. These They will consist mainly consist 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: Autotransformers Description Nueva Huánuco 50/220 Yanango 500 / 220 kV substation SS 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 Reactors Description Nueva Huánuco 220/138 Yanango 500 kV substation SS Nueva Yanango – Colcabamba TL Nueva Yanango – Carapongo TL Primary winding voltage 220 500 / √3 kV Secondary winding voltage 138 500 / √3 kV Tertiary winding voltage -- 500 / √3 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 “Año del Buen Servicio al Ciudadano” Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Reactors Description Nueva Huánuco 500 kV substation Nueva Huánuco – Yanango TL Primary winding voltage 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. These They will consist mainly consist 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: Autotransformers Description Nueva Huánuco 50/220 kV substation 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 three-phase bank 750 MVA Plus one reserve single-phase unit Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Description Nueva Huánuco 220/138 kV substation 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 “Año del Buen Servicio al Ciudadano” Refrigeration ONAF Neutral connection Solid to earth Accessories Bushing type current transformers Reactors Description Nueva Huánuco 500 kV substation Nueva Huánuco – Yanango TL Primary winding voltage 500 / √3 kV 500 / √3 kV Type Single-phase Single-phase Rated power per single-phase unit 33 MVAr (**) 30 MVAr (**) Rated power of three-phase bank 100 MVAr (**) Plus one reserve unit 90 MVAr (**) Plus one reserve unit Refrigeration ONAN ONAN Neutral connection Solid to earth Neutral reactor (**) Accessories 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. These will mainly consist of the following components:transformers