London Underground power supply system

GPTKB entity

Predicate	Object
gptkbp:instanceOf	railway electrification system power supply system
gptkbp:country	gptkb:United_Kingdom
gptkbp:fourthRailVoltage	-210 V DC
https://www.w3.org/2000/01/rdf-schema#label	London Underground power supply system
gptkbp:introducedIn	1890
gptkbp:location	gptkb:London
gptkbp:mainSubstations	various locations across London
gptkbp:maintenance	London Underground engineers
gptkbp:notableFeature	distinct from mainline UK railways separate return rail to reduce stray currents uses both third and fourth rail
gptkbp:operator	gptkb:Transport_for_London
gptkbp:purpose	traction power for trains
gptkbp:thirdRailVoltage	+420 V DC
gptkbp:trackGauge	standard gauge
gptkbp:usedBy	gptkb:London_Underground
gptkbp:usedOn	gptkb:Bakerloo_line gptkb:Piccadilly_line gptkb:Central_line gptkb:Metropolitan_line gptkb:Northern_line gptkb:Victoria_line gptkb:Waterloo_&_City_line District line Hammersmith & City line Jubilee line
gptkbp:usesCurrentType	direct current
gptkbp:usesFourthRail	yes
gptkbp:usesThirdRail	yes
gptkbp:usesVoltage	630 V DC
gptkbp:bfsParent	gptkb:London_Underground_electrical_substation
gptkbp:bfsLayer	8