AUC 207 ADD 9 CATENARY WIRES ON AMTRAK RR LINES Flashcards
Pantograph
- Carriage assembly mounted above a locomotive
* Can be raised or lowered to make contact with catenary line
Catenary wires
- Overhead electrical wires
- 12,000 volts AC
- Retain residual power when power removed
- Residual removal requires class “A” to ground the catenary
Dual powered
- Can switch from one power to another
- Use diesel in rural areas
- Use electricity when entering the city
Grounding stick
A device that provides an electrical connection from the rail return circuit to the catenary circuit, used to protect personnel, equipment and property
Grounding switch
A device that provides an electrical connection from the rail return circuit to the catenary circuit, used to protect personnel, equipment and property
Voltage detecting device
A device used by the railroad Class “A” employee ( A Man) to detect alternating current (AC) Voltage. When the voltage detecting device is held against the catenary conductor ( by means of a long pole) it detects if the catenary conductor is energized or de-energized. This instrument will determine if a power source has been discontinued. It will NOT detect residual static current
Class “A” employee ( A Man)
An electric traction department employee of the railroad specially trained to work with high voltage
480 Volt Stand-by Power
Electrical power supplied to a standing train via a cable supplying 480 volts of AC power to operate the refrigeration, lighting, air conditioning, and any other incidental electrical equipment between runs. It is a heavy BLACK cable running below the platform between the tracks to the train in Penn Station. The power source for the 480 volt stand by power is independent of the catenary wires and third rail.
The application of water shall be considered only when
Power to the 3rd rail, 480 volt stand by, and catenary wires have been shut down. At this point there still is the possibility that residual static electricity is present in the catenary wires, pantograph and electrical components of the train
The application of a Fog water stream, after power has been removed from the catenary lines but before the residual static electricity has been removed by the railroad grounding the catenary wires shall be guided by the following
- Fog Nozzle in the Fog pattern position shall be used from a platform into the train avoiding any contact with the overhead electrical wires and the pantograph connection
- If conditions warrant a hand line using a fog stream can be operated from the adjacent platform directing water at the trains undercarriage, thus controlling fire and/or cooling the diesel fuel tank, maintaining its integrity
- Short bursts of fog water stream shall be utilized to avoid accumulations of water pooling. Run-off water presents an electrical hazard and officers shall make certain that firefighters are not standing in the path of run-off water
As noted in the NFPA Fire Protection Handbook, tests conducted with various water spray nozzles indicate that a minimum of
4 Feet should be maintained for voltages from 10,000 volts to 30,000 volts. However a coming sense approach to catenary lines containing approximately 12,000 volts is required.
All fire teams applying water with hand held Fog Nozzles should take advantage of the reach of the stream and observe a
Minimum approach distance of 10 Feet to catenary lines
Position firefighters at
Each possible point of entry into the affected area to warn all incoming units that the limited application of water at this stage of operations shall not be misconstrued as confirmation of power off or the absence of an electrical hazard
When operating the nozzle always
Divert the stream to a safe area momentarily to visually check that a Fog pattern is set properly
Hose steams should NOT be
Directed over the top of a train where pantograph or catenary wires are located