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
How long does it take class A employees to arrive on the scene
1 hour
What is used to ground power lines
Grounding stick with the grounding wire from the stick to the rail
Overhead catenary lines can arc up to ___ ft
3 ft
Some switches are operated as far away as
Jacksonville fl
Some switches may have up to _____
_________gallon LPG tanks to supply the heater
6
1000
Markers are spaced how far apart?
1 mile
“Milepost”
Static wires contain how many volts
0
Transmission lines how many volts
138,000
8ft away (arc)
Signal lines how many volts?
6,900
Stay away 3 ft (arc)
Trolley wires how many volts?
12,000
Stay away 3 ft (arc)
Passing trains: safe distance
30 feet
Standing train: safe distance
25 feet
Apparatus from centerline
15 feet
