US 12,230,429 B2
Transportable power transformer unit
Christian Ettl, Weiz (AT)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 16/962,340
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Jan. 15, 2018, PCT No. PCT/EP2018/050859
§ 371(c)(1), (2) Date Jul. 15, 2020,
PCT Pub. No. WO2019/137623, PCT Pub. Date Jul. 18, 2019.
Prior Publication US 2020/0343033 A1, Oct. 29, 2020
Int. Cl. H01F 27/00 (2006.01); H01F 27/02 (2006.01); H01F 27/12 (2006.01); H01F 27/24 (2006.01); H01F 27/32 (2006.01)
CPC H01F 27/12 (2013.01) [H01F 27/025 (2013.01); H01F 27/24 (2013.01); H01F 27/32 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A transportable power transformer unit, comprising:
at least one single-phase transformer configured for connection to a high-voltage grid, each single-phase transformer including:
a tank to be filled with an insulating fluid for receiving a core with a high-voltage and low-voltage winding;
at least one bushing socket to be connected by a winding connection line extending inside said tank to the high-voltage or low-voltage winding;
at least one high-voltage bushing being inserted into said at least one bushing socket removably for transport;
cooling equipment for cooling the insulating fluid;
an expansion vessel for compensating for temperature-induced volume fluctuations of the insulating fluid;
said expansion vessel and said cooling equipment being permanently mechanically fixedly connected to said tank; and
a transport unit formed of said expansion vessel, said cooling equipment, said tank and each bushing socket, said transport unit having an external contour lying inside a predefined transport profile facilitating transport of the transportable power transformer unit without said at least one high-voltage bushing extending beyond said external contour during transport, and said tank, said cooling equipment and said expansion vessel being filled with insulating fluid during the transport.