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Re: Amtrak Cascades had a lights out event HEP go boom???
Author: @Alf Doten
Date: 04-08-2024 - 15:10
"Crew members told the passengers that the the hydraulic system was broken in the engine, they said. Then, the power went out and left them in the dark."
I asked ikiw about "hydraulic" HEP...
PER IKIW-
Locomotive prime mover
In many applications, the locomotive's prime mover provides both propulsion and head-end power. If the HEP generator is driven by the engine then it must run at a constant speed (RPM) to maintain the required 50 Hz or 60 Hz AC line frequency. An engineer will not have to keep the throttle in a higher run position, as the onboard electronics control the speed of the engine to maintain the set frequency.
More recently, locomotives have adopted the use of a static inverter, powered from the traction generator, which allows the prime mover to have a larger RPM range.
When derived from the prime mover, HEP is generated at the expense of traction power. For example, the General Electric 3,200 hp (2.4 MW) P32 and 4,000 hp (3.0 MW) P40 locomotives are derated to 2,900 and 3,650 hp (2.16 and 2.72 MW), respectively, when supplying HEP.
The Fairbanks-Morse P-12-42 was one of the first HEP equipped locomotives to have its prime mover configured to run at a constant speed, with traction generator output regulated solely by varying excitation voltage.
I asked ikiw about "hydraulic" HEP...
PER IKIW-
Locomotive prime mover
In many applications, the locomotive's prime mover provides both propulsion and head-end power. If the HEP generator is driven by the engine then it must run at a constant speed (RPM) to maintain the required 50 Hz or 60 Hz AC line frequency. An engineer will not have to keep the throttle in a higher run position, as the onboard electronics control the speed of the engine to maintain the set frequency.
More recently, locomotives have adopted the use of a static inverter, powered from the traction generator, which allows the prime mover to have a larger RPM range.
When derived from the prime mover, HEP is generated at the expense of traction power. For example, the General Electric 3,200 hp (2.4 MW) P32 and 4,000 hp (3.0 MW) P40 locomotives are derated to 2,900 and 3,650 hp (2.16 and 2.72 MW), respectively, when supplying HEP.
The Fairbanks-Morse P-12-42 was one of the first HEP equipped locomotives to have its prime mover configured to run at a constant speed, with traction generator output regulated solely by varying excitation voltage.
