Gotthard line
 
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End points of the Gotthard line |
The Gotthard line is a 1958 by Motor-Columbus erected three-phase - high-voltage line through the Gotthard Pass from Mettlen at Inwil to Airolo . Although the overhead line masts used are designed for an operating voltage of 400 kV, it is operated at 380 kV. The Gotthard line is owned by the Swiss grid company Swissgrid .
Lines
On the 52-kilometer section from Mettlen to Amsteg , it mostly runs parallel to the Lukmanier line . Between Immensee and Amsteg, it shares its masts with the Amsteg – Rotkreuz current loop of the Swiss Federal Railways (SBB) , making it a hybrid line . Both energy routes touch the Rigi from Immensee to Ingenbohl . In the municipality of Ingenbohl, which is supplied by the CKW, the Gotthard line is connected to a substation with three out of six circuits. There is an ascent from Ingenbohl to Morschach , so that the Gotthard and Lukmanier lines contain reinforced masts there. The two lines run to the right of Lake Lucerne and Lake Uri and then cross the Urner Reuss Valley . While the Lukmanier line is mostly on the plain, the Gotthard line leads along the mountainside to the left of the Reuss . The Gotthard line has three poles and carries three additional circuits that end in the Plattischachen substation. From Amsteg she goes her own way. It is not to be confused with the four-pole transmission line of the Swiss Federal Railways , which also passes the Gotthard.
160 masts are used: some Danube masts at Mettlen, barrel masts to Immensee, then fir tree masts for the benefit of SBB. For the 56.8 kilometer long line section between Amsteg and Lavorgo over the Gotthard Pass, 171 lattice masts , mostly delta masts with a wide foundation, were erected for a single-level circuit. Their mean height is 24.13 meters. It crosses the Furkareuss valley between Andermatt and Realp . There the lightning rod and all electrical circuits were given their own mast on both sides. This measure was taken at various points in order to reduce to a minimum the risk that two of the double wires could touch each other, which happened during the preliminary lead.
construction
The mean span of the line is 350 meters, the largest span between two masts is 1240 meters. Two bundles from Aldrey with a cross-section of 550 mm² are used as conductors . The diameter of each part rope is 30.5 mm. Two steel cables with a diameter of 11.5 mm and a cross-section of 80 mm² are used as the earth wire.
literature
- Gerhard Schwickardi: Energy transmission, networks, energy distribution, overhead lines, cable lines, switchgear, switchgear, energy conversion, instrument transformers, transformer stations, substations, automation of control rooms . In: Elektro-Energietechnik 2 (pp. 218–220). AT Verlag, Aarau 1979, ISBN 3-85502-032-9
