Technical Requirements of the Substations Sample Clauses

Technical Requirements of the Substations. The autotransformers must be supplied with current transformers incorporated in bushings, three-core protection 5P20, for the three phases and three windings, in addition to the corresponding cores for regulation and thermal image protection. The rated voltage, voltage regulation and connection group of the 500/220 kV autotransformer bank shall be as follows:  Voltages - Primary voltage 500 kV - Secondary voltage 220 kV - Tertiary voltage (*) (*)  Connection group YN / YN / d(Δ) - Primary side, 500 kV Star (wye), neutral solidly grounded “Año del Buen Servicio al Ciudadano” - Secondary side, 220 kV Star (wye), neutral solidly grounded - Tertiary side (*) Delta (∆) - Voltage regulation Loaded on the 220 kV side  Rated power - Three-phase banks (500/220) kV 600(*) / 750 MVA (ONAN/ONAF) - Single-phase unit (500:√3/220: √3) kV 200(*) / 250 MVA (ONAN/ONAF) The rated voltage, voltage regulation and connection group of the 220/138 kV autotransformer bank are:  Voltages - Primary voltage 220 kV - Secondary voltage 138 kV - Tertiary voltage (*) (*)  Connection group YN / YN / d(Δ) - Primary side, 220 kV Star, neutral solidly grounded - Secondary side, 138 kV Star, neutral solidly grounded - Tertiary side (*) Delta (∆) - Voltage regulation Loaded on the 220 kV side  Rated power - Three-phase bank (220/138) kV 75(*) / 100 MVA (ONAN/ONAF) - Single-phase unit (500:√3/220: √3) kV 25(*) / 33 MVA (ONAN/ONAF) (*) These values will be proposed by the Concessionaire in the Pre-Operative Study for evaluation and approval by COES-SINAC. As a reference, a regulation under load is recommended of ± 10% on the 220 kV side, with 1% steps. However, the Concessionaire must define rated voltages, number and range of tap variations and transformer drive and control mechanisms, in accordance with what is defined, substantiated and approved in the Pre-Operative Study.
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Technical Requirements of the Substations a) General technical specifications In this section, we specify the technical requirements which shall support and comply with the equipment of substations. However, during the development of the final study, the Concessionaire shall carry out all proper studies to determine correct operating performance of the proposed system. ▪ Equipment from manufacturers with a minimum manufacturing and supplying experience of fifteen (15) years should be installed. ▪ Equipment must be of recent technology and with proven successful operation through references by transmission system operators. ▪ Equipment must include certified reports by recognized international institutes, showing they have successfully passed Prototype Tests. All equipment will be subjected to Routine Testing. ▪ The applicable standards required both the equipment and any other facilities, (including the grounding mesh at substations and the grounding resistance where the structures shall be located), will mainly be as follows: CNE 2011 supply (number 36D) ANSI/IEEE, IEC, VDE, NEMA, ASTM, NESC, and NFPA.
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