US 11,811,213 B2
Transformer for underground radial loop network
Nicholas Seng, Chicago, IL (US); Michael R Maroney, Chicago, IL (US); Alejandro Montenegro, Chicago, IL (US); and Goran Djogo, Mount Prospect, IL (US)
Assigned to S&C Electric Company, Chicago, IL (US)
Filed by S&C Electric Company, Chicago, IL (US)
Filed on Aug. 12, 2021, as Appl. No. 17/400,408.
Claims priority of provisional application 63/085,441, filed on Sep. 30, 2020.
Prior Publication US 2022/0102974 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02H 7/26 (2006.01); H02H 3/06 (2006.01); H02J 3/00 (2006.01); H02J 13/00 (2006.01); H02H 3/08 (2006.01); H02J 50/00 (2016.01); H01H 33/53 (2006.01); H01H 33/66 (2006.01); H02H 1/00 (2006.01); H02H 7/04 (2006.01); G01R 31/08 (2020.01); H02H 3/04 (2006.01)
CPC H02H 3/06 (2013.01) [G01R 31/086 (2013.01); H01H 33/53 (2013.01); H01H 33/66 (2013.01); H02H 1/0007 (2013.01); H02H 3/042 (2013.01); H02H 3/063 (2013.01); H02H 3/08 (2013.01); H02H 7/04 (2013.01); H02H 7/26 (2013.01); H02H 7/261 (2013.01); H02J 3/0073 (2020.01); H02J 3/00125 (2020.01); H02J 13/0004 (2020.01); H02J 13/00016 (2020.01); H02J 50/001 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A transformer assembly for reducing a higher voltage to a lower voltage, the transformer assembly including a transformer, the transformer assembly comprising:
an enclosure enclosing a primary winding and a secondary winding;
a first switching device including a first outer housing, a first transformer interface electrically coupled to the transformer, a first connector interface electrically coupled to a first connector and a first vacuum interrupter having a first fixed terminal and a first movable terminal, the first fixed terminal being electrically coupled to the first connector interface or the first transformer interface and the first movable terminal being electrically coupled to the other first connector interface or the first transformer interface; and
a second switching device including a second outer housing, a second transformer interface electrically coupled to the transformer, a second connector interface electrically coupled to a second connector and a second vacuum interrupter having a second fixed terminal and a second movable terminal, the second fixed terminal being electrically coupled to the second connector interface or the second transformer interface and the second movable terminal being electrically coupled to the other second connector interface or the second transformer interface, wherein a common control board controls the first and second switching devices, and wherein each of the first and second switching devices includes at least one capacitor electrically coupled to the fixed terminal, the control board being responsive to voltage signals from the at least one capacitor in the first and second switching devices, and wherein the at least one capacitor in the first and second switching devices provide an interface for power line communications signals, provide a voltage for voltage sensing, provide a voltage to help determine power flow direction and provide a voltage to help determine the distance to a fault.