Germany – Electrical wiring and fitting work – UW Gotha Gleichenstraße - Reko Umspannwerk mit Aufbau 20-kV-Ebene

The contracting authority (AG) for the project is TEN Thüringer Energienetze GmbH & Co. KG. This is a regional grid operator. The planning and assembly service advertised here is a sub-lot as part of the planning and construction of a 110-kV substation. The new UW Gotha Gleichenstraße will be built on the existing site next to the old compressed air HS plant. After the new plant is commissioned, the old plant will be demolished. The new build is a substation with 2 busbars in one block. The new plant to be planned and constructed consists of: - 1 construction section - 2 busbars - 1 block - 1 cross coupling with internal longitudinal separation (to be provided in the planning but not to be constructed) - 2 transformer fields - 1 SS-U transformer field (to be provided in the planning but not to be constructed) - 2 line fields - 1 HS-E coil incl. E coil star point switching system - 4 MS-E coils incl. E coil star point switching system (incl. power output to the transformers) - 2 MS switchgear buildings (integration of the MS-SA/ planning and implementation of the transformer power output as well as cable corridor to the property boundary and 20-kV cable couplings between the MS systems) - Execution planning, laying and assembly of the entire secondary wiring, including fibre optic cables, in the UW site and all buildings (price submission according to cable types [price/100m], billing according to measurement), laying is mainly carried out in empty pipe systems - AC/DC system connection planning included in the scope of supply - NEA connection planning included in the scope of supply - Fibre optic cabling supply, assembly and measurement (OTDR measurement; external fibre optic cables are to be spliced, internal fibre optic cables are to be laid as patch cables) - All protection and control cabinets, as well as the secondary planning, are included in the scope of supply. The AG will provide sample circuit diagrams for this purpose. The contractor (AN) supplies, installs and connects the following cabinets: o 4x protection and 4x control cabinets (HS) o 1x AC main distribution and 3x sub-distribution cabinets for the control cells o 1x DC main distribution (connect) o 1x metering cabinet o 2x E coil switching system control cabinets; 4x HPCI cabinets; 3x E coil control cabinets (HS+MS) o 2x transformer control cabinet o 2x AC/ 2x DC sub-distribution cabinets o Intermediate junction boxes for each transformer and E coil o 1x remote control system consisting of two cabinets The scope of the tender includes the planning of the preferred variant (LPH2) of a 110-kV system handed over by the AG to be converted into an execution planning and assembly. Planning scope on the part of the contractor (AN): Creation of execution-ready planning documents for the construction and operation of the 110-kV substation, both in analogue form on paper and digitally in *.DWG format or suitable formats. This includes, among other things: - Sections and top views of each field and transformer and reactors (HS and MS) and MS switchgear/ system (installation plan/ cable layout plan/ cable fastening/ occupancy of the Hauff bushings). - Overall system, incl. transformers and MS system, incl. MS cable layout plan on the UW site - Earthing planning (part of the construction documents) - Empty pipe planning - Foundation layout plan (part of the construction documents) - Lightning protection planning (due to the foundation layout plan and thus also part of the construction documents) - Lighting planning - Wire, pipe and terminal planning - Steel construction planning (complete execution planning for manufacture and installation) - Proof of short-circuit strength/ short-circuit current calculation - Structural planning steelwork/ indication of the design support forces lower edge base plate (steelwork) of the primary system. (Main part of the construction documents: These are necessary for construction planning and are therefore penalised accordingly!). Dimensioning of the anchor baskets for all steel components taking into account the reinforced concrete foundation geometry. - Adapted circuit diagrams based on sample circuit diagrams - Secondary design (outlet planning, route planning, selectivity test, etc.) - Planning of the system in geo-referenced coordinates (location reference ETRS89, height reference DHHN2026) as XREF format for construction planning - Planning of the system in 3D and delivery of the overall planning in an agreed file format Planning of the construction conditions: New system must be shown next to old system Supply and assembly services on the part of the AN: - Wires, terminals and pipes (HS/ MS/ NS) incl. all fastening materials - Press connectors and connection material for earthing system - Cable end terminations (MS transformers/ switchgear/ E coils) - Small material - Stainless steel trays for cable pulling shafts - Control and fibre optic cables - Waiting cabinets and intermediate junction boxes - Introduction material and service for the transport and assembly of the secondary cabinets - 0.4-kV construction power supply incl. metering - If nothing else has been announced by the AG by the time of the award, the storage of the AN material is the responsibility of the AN. Provision by AG: - 110-kV circuit breaker - 110-kV current transformer - 110-kV voltage transformer - 110-kV disconnector - 110-kV insulator - 110-kV surge arrester - Earth wire (120 mm² tinned) - MS cable - MS switchgear (currently still being tendered by AG; design and layout are still vacant until award) - MS star point switching system - MS auxiliary power transformers - Control cells incl. lighting and sockets (house installation but without connection to AC/DC sub-distribution; this has to be done by AN) - HS/ MS transformers - MS/ NS transformers - MS-E coils - 110-kV-E coil - Battery system (dual system) - DC main distribution - Emergency power generator (standby power system - NEA) - Remote control system (2x installation and connection) - Near control PC incl. software - Protection and field control devices - Voltage and detuning regulator - HPCI cabinets - Network technology (field switches) - Location plan of the preferred variant (LPH2), HS operating equipment placement, system layout, portal geometry with tensioning forces (further information, see cover letter)