Pictures 2 Railroad Power Director Center - Thirtieth Street Station, Philadelphia Pennsylvania
1995 Southeast of main supervisory board showing panels 3 through 11; panel 3 at far left contains meters for monitoring power in the system; panel 4 contains controls for controlling heaters to keep track twitches free of ice and snow; panels 5, 6, and 7 date to the 1935 installation and control the catenary in the area of the station yard. These work on 120 volts direct current; panel 8 contains circuit breakers (rupture switches) which control power to individual tracks in the station area; panels 9 and 10 house controls for the West Philadelphia sub-station; panel 11 controls sub-station 13 in South Wilmington Delaware and miscellaneous meters
1995 Northeast of a microchip based computer control system installed in the early 1980's to replace Lamokin Tower, at center of photograph; panels 1 and 2 at right of photograph are part of main supervisory board; panel 1 controlled Allen Lane sub-station #7; responsiblity for this portion of the system was transferred to southeast Pennsylvania transit authority (septa) in 1985; panel 2 at extreme right controls catenary switches in a coach storage yard adjacent to the station
1995 Northeast of secondary supervisory board at center right of photograph; main supervisory board is in background; carousel displaying detailed schematic wiring diagrams for the system is at left of photograph
1995 Northwest of power directors board; hole at center formerly held a clock
1995 Switchboard panel operator's station #1; panel contains 1200 push-pull button switches which control poer to red, green, and white indicating lights on the model board; white lights indicate that power is off; green lights indicate that equipment (switch breaker or transformer) is off; red lights indicate that equipment is on
