1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

North East Corridor

Discussion in 'General Discussion' started by Train4life, Jul 6, 2019.

  1. Train4life

    Train4life New Member

    Jul 6, 2019
    Likes Received:
    Does anyone know what the auto ser switch next to the number light switch is for in the sw1000r locomotive?
    • Like Like x 1
  2. xD 2Bad4You

    xD 2Bad4You Well-Known Member

    Mar 10, 2018
    Likes Received:
    I´ve wondered that aswell. Couldnt find an answer though, so if anyone knows that it would be great.
  3. -PjM-

    -PjM- Well-Known Member

    Jul 30, 2018
    Likes Received:
    I haven't got the locomotive but would it be the service selector switch you are referring to?

    The SW1000 manual was a bit ropey and wouldn't copy paste so here's the SW1500 manual which had near identical wording.
    Service Selector Switch

    This rotary snap switch is provided to select the type
    of locomotive service required. The switch has four
    (FORESTALLING), and ROAD (AUTO). The func-
    tions of the various positions are as follows:

    SWITCHING I Position
    This is the nonnal position for yard switching. The
    load regulator is in maximum field position at loco-
    motive start and the generator excitation circuit is set
    up to provide fast but controlled throttle response for
    switching operations.

    SWITCHING 2 Position
    Locomotive operation in the SWITCHING 2 position
    is the same as in SWITCHING I position except that
    the engine idles faster in SWITCHING 2 position. The
    faster idle results in faster acceleration. This position
    may be used when fast acceleration such as for
    "kicking" cars is desired.

    This switch position is included with the SW 1500
    switcher even though the motors are connected in
    permanent series-parallel with the main generator. The
    reason being that switchers with transition circuits
    may operate in multiple with the SW1500. In such
    case, the SERIES position is used in slow speed heavy
    drag service where series-parallel transition speed is
    reached so infrequently that changes in motor connec-
    tion are not desirable.
    With the service selector switch in SERIES position,
    the load regulator is in minimum field position at
    locomotive start. Throttle response limiting resistance
    in the generator field excitation circuit is modulated
    by the load regulator. This provides smooth applica-
    tion of power for a softer start in road service. If
    SWl500 switchers are operating in consist or
    independently, the SERIES and the ROAD positions
    have the same effect.

    ROAD (AUTO.) Position
    The ROAD position is used during moderate and high
    speed road operation. At locomotive start the load
    regulator is in minimum field position and throttle
    response limiting resistance in the generator field
    excitation circuit is modulated by the load regulator
    to provide a softer start in road service. If the SW 1500
    is operating in multiple with units that are equipped
    to make transition, it allows for a change from series
    to series-parallel on trailing units.
    Again not owning it, the switch might be different on the TSW model. Or it might even be a different switch! (In which case ignore me)

Share This Page