Chapter 1 (Railroad facilities and track roadway) Flashcards
Transmission lines are how many volts
132,000 volts
Catenary “trolley” wires are how many volts?
12,000 volts
Signal power lines are how many volts?
6,900 volts
Order of lines in the catenary system
Ground (static)
Transmission 138,000
Signal power 6,900
Catenary “trolley” 12,000
In an emergency, the catenary system must be shut down by Amtrak personnel in ?
Philadelphia
In an emergency, the catenary system must be grounded by who?
Onsite Amtrak class A lineman or electrician
In the absence of class A electrians, the catenary system can be shut down and grounded by who?
Foreman and class B employees in the two sections of the ivy city yard
On downed catenary lines, stay _____ ft away
15
Transmission lines stay how far away
Nothing allowed within 8 ft
Signal power lines, objects must not be allowed within ____ feet
3
Catenary lines “trolley” objects must not be within _____ ft
3
Impedance bonds
Electrical devices that permit passage of higher voltage propulsion current but prevent the passage of lower voltage signal current.
Wires connected to the impedance bonds are called what?
Leads
Where are impedance bonds located
Near rail signals between rails
Impedance bonds are a electrocution hazard (true/false)
True
