Transformer for underground radial loop network

A transformer assembly for reducing a higher voltage to a lower voltage, the transformer assembly including a transformer, the assembly comprising:

• an enclosure enclosing a primary winding and a secondary winding;
• a first switching device including a first outer housing, a first component interface electrically coupled to a component, 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 and the first movable terminal being electrically coupled to the first component interface, the first switching device further including a first conductor electrically coupled to the first fixed terminal, the first conductor including a first orifice, a second conductor electrically coupling the first connector interface to the first conductor, the second conductor having an end that is slidable inserted into the first orifice, a third conductor electrically coupling the first conductor to a first capacitor, the first conductor including a second orifice, the third conductor having an end that is slidable inserted into the second orifice, a fourth conductor electrically coupled to the first movable terminal, the fourth conductor including a third orifice, a fifth conductor electrically coupling the first component interface to the fourth conductor, the fifth conductor having an end that is slidable inserted into the third orifice;
• a second switching device including a second outer housing, a second component interface electrically coupled to the component, 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 and the second movable terminal being electrically coupled to the second component interface, the second switching device further including a sixth conductor electrically coupled to the second fixed terminal, the sixth conductor including a fourth orifice, a seventh conductor electrically coupling the second connector interface to the sixth conductor, the seventh conductor having an end that is slidable inserted into the fourth orifice, an eighth conductor electrically coupling the sixth conductor to a second capacitor, the sixth conductor including a fifth orifice, the eighth conductor having an end that is slidable inserted into the fifth orifice, a ninth conductor electrically coupled to the second movable terminal, the ninth conductor including a sixth orifice, and a tenth conductor electrically coupling the second component interface to the ninth, the tenth conductor having an end that is slidable inserted into the eighth orifice;
• and
• a common control board controlling the first and second switching devices.

A transformer assembly for reducing a higher voltage to a lower voltage, the transformer assembly including a transformer, the 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, the first switching device further including a first energy harvesting element electrically coupled in parallel with the first vacuum interrupter, a first control rod coupled to the first movable terminal, a first actuator assembly coupled to the first control rod and being operable to move the first control rod to open and close the first vacuum interrupter, and a first electronics assembly electrically coupled to the first movable terminal, the first electronics assembly including a first electronics control board having a plurality of electronic components coupled thereto including a first high voltage capacitor and a first energy storage capacitor, wherein the first high voltage capacitor provides a current that is used to power the first board, operate the first actuator assembly and charge the first storage capacitor when current flow is provided through the first vacuum interrupter or the first energy harvesting element;
• 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, the second switching device further including a second energy harvesting element electrically coupled in parallel with the second vacuum interrupter, a second control rod coupled to the second movable terminal, a second actuator assembly coupled to the second control rod and being operable to move the second control rod to open and close the second vacuum interrupter, and a second electronics assembly electrically coupled to the second movable terminal, the second electronics assembly including a second electronics control board having a plurality of electronic components coupled thereto including a second high voltage capacitor and a second energy storage capacitor, wherein the second high voltage capacitor provides a current that is used to power the second board, operate the second actuator assembly and charge the first storage capacitor when current flow is provided through the second vacuum interrupter or the second energy harvesting element.