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115 kV Inductors13.8 kV Capacitor115 kV Gas Insulated Switchgear230 kV Gas Insulated Switchgear15 kV Air Insulated Switchgear115 kV Gas Insulated Switchgear26 kV Air Insulated Switchgear26 kV Capacitor230 kV to 115 kV Oil Transformer115 kV to 26 kV Oil Transformer115 kV to 13.8 kV Oil Transformer
Transformers raise or lower the voltageas needed to serve the transmission circuits
Transformers raise or lower the voltageas needed to serve the transmission circuits
Inductors control andbalance electrical loads
Inductors control andbalance electrical loads
1
Capacitors controland store voltage
2 8
Switchgear helps regulateand protect electrical equipment
Gas Insulated Air Insulated
Switchgear helps regulateand protect electrical equipment
4 6 5Denny Substation: A Look InsideThe Denny Substation will serve a growing area of high-tech and bio-tech industries in South Lake Union, as well as other high-use customers across north downtown. The unique design features state-of-the-art electrical equipment and underground distribution and transmission lines to reduce their visual impact.
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South Lake Union Distribution LineDenny Triangle Distribution LineTransmission Line
LEGEND
DID YOU KNOW
?
This substation will provide enough
electricity to power two SeaTac Airports.
DID YOU KNOW
?
Most of the substation equipment will be
housed in enclosed structures.
73
Garage Door
MIN
OR A
VEN
UE
YALE AVE
ALLEY
NORTH
JOHN ST
DENNY WAY
To Canal Street Substation
From Massachusetts
Street Substation
MaintenanceBuilding
To Broad Street Substation
David ColwellBuilding
The Brewster
Control Building
1
3
11
5
11
11
2
6
9
4
8
2
Pump House
From East Pine Substation
107
The substation will generate some of its
own electricity through solar power.
Capacitors controland store voltage