Tenders Are Invited For Solar Photovoltaic Modules - Supply And Installation Of Photovoltaic Installations F ... in Bulgaria

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Solar Photovoltaic Modules - Supply And Installation Of Photovoltaic Installations For Administrative Building - Town Hall, Upi X - 190, Sq. 31, S. Bolyarino, Rakovski Municipality. Basic Data According To The Investment Project: Building Structure - Fec: The Supporting Structure On Which The Photovoltaic Modules Are Mounted Is Metal. It Is Made Of Prefabricated Frames Of Cold-Bent Profiles, Located On The Ground In 2663 Mm. Photovoltaic Panels Are Mounted Respectively In Four Rows And Are Inclined At An Angle Of 30 Degrees. The Foundation Type Of The Frames Is Pilot, Performed By Tamping Using A Specialized Hydraulic Tamping Machine At A Depth Of Min. 1850 Mm On Type 1 Columns (Sop 120X70x4) With An Anti-Corrosion Coating And A Length Of 2300 Mm. (More Information Is Contained In The Project). Location: The Photovoltaic Power Plant Consists Of 42 Units. Photovoltaic Modules Located In The Field, 3 Pcs. Inverter, Cable Network, Switchboard. Photovoltaic Modules Have A Power Of 450 Wp. The Modules Are Arranged In Eight Groups (Strings), With 6 Pcs. Thongs Are Connected By 7 Pcs. Series Connected Modules. There Are 3 Inverters. - Single-Phase, 6Kw Model Huawei Sun2000-6Ktl-L1 Forming Together A Three-Phase System. (More Information Is Contained In The Project). Technical Solutions: The Two End Modules Of Each Group (Each String) Of Panels Via A Dc Solar Cable 1X6 Mm2 Are Connected To A Dc String Distribution Board Where A Dc Fuse Is Installed For Each String And From There Via A Dc Solar Cable 1X6 Mm2 They Are Connected To The Corresponding Input Of The Inverter. The Inverters Are Connected To An Ac Distribution Board Where A Three-Phase Circuit Breaker Is Installed And Will Be Powered By A Nyy 3X6mm² Cable. The Ac Switchboard Is Connected To The Buildings Grt Via A Nyy 5X10mm² Cable. The Modules Are Connected Using Closed Connectors Supplied By Their Manufacturer. A Very Important Element For A Solar Photovoltaic Installation Is The Converter /Inverter/ For Connection To The Grid. The Profitability Of The Installation Largely Depends On Its Efficiency And Price. The Converters Are Those Elements That Convert The Direct Current From The Photovoltaic Modules Into An Alternating Current That Is Transformed /Stepped Up/ And Fed To The Grid. In This Way, The Necessary Protection For Devices And People Is Achieved, Such As Reducing Losses And Improving The Quality Of Supply In The Power Distribution Network. The Converters Intended For This Project Are Type Huawei Sun2000-6Ktl-L1 With Nominal Power P=6Kw. It Is A Single-Phase Converter, With A Range Of Dc Input Voltages 140-980 Volts (Maximum 1100V) Output Voltage At Ac 230V And A Frequency Of 50 Hertz. The Inverter Has A Built-In Electronic Interrupting Device According To Dln Vde 0126-1-1 Preventing Operation In Island Mode. It Is Also Equipped With An Independent Switching System That Automatically Disconnects The Power Plant From The Lv Power Distribution Network In The Event Of A Network Power Failure Or Deviations In The Voltage And Frequency Parameters. The Cables Are For Outdoor, Mobile Or Fixed Installation And Are Protected From Atmospheric Influences, High And Low

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