Home | Open Account | Help | 293 users online |
Member Login
Discussion
Media SharingHostingLibrarySite Info |
Eastern Railroad Discussion > PRR PL signal questionDate: 07/28/20 18:48 PRR PL signal question Author: 611Doug Technical question. What was the voltage used in this system? I seem to remember that as originally installed it was a 32 volt system. Does anyone know if that is correct and was the system modified in later years to a more conventional voltage, like 120 volts?
Thanks, Doug Date: 07/28/20 22:49 Re: PRR PL signal question Author: SP4360 I don't know what their system is, but most if not all signal systems today run on 12vdc, using 10v25w signal precision bulbs and LED's.
Date: 07/29/20 10:23 Re: PRR PL signal question Author: CGTower No signal systems supply lamp voltage at 120 volts. Lamps are usually lit at 10V DC...
CG Tower 611Doug Wrote: ------------------------------------------------------- > Technical question. What was the voltage used in > this system? I seem to remember that as > originally installed it was a 32 volt system. > Does anyone know if that is correct and was the > system modified in later years to a more > conventional voltage, like 120 volts? > Thanks, > Doug Date: 07/29/20 15:45 Re: PRR PL signal question Author: NixonRocks I seem to recall the lamp voltage would change with the time of day, higher voltage during the day, lower at night
Date: 08/01/20 07:47 Re: PRR PL signal question Author: engineerinvirginia NixonRocks Wrote:
------------------------------------------------------- > I seem to recall the lamp voltage would change > with the time of day, higher voltage during the > day, lower at night > Perhaps with incandescent bulbs though not all of them have this capability....LED, for their part have a trigger voltage below which they will not make light...and while there is dimmable technology for LED's I do not see it used in signals....the ones I am exposed to are quite bright at night.... |