Overhead Wiring for the Light Rail Transit Extension in by zsg11761


									Overhead Wiring for the Light Rail Transit Extension                                                                              reduce significantly the cost of the
                                                                                                                                  implementation of the Light Rail
                                                                                                                                                                              corresponding to basic conditions on
                                                                                                                                                                              implementation dimensions, load
                                                                                                                                                                                                                         catenaries, hot-dip galvanised tubes
                                                                                                                                                                                                                         in special attachments have been

in Denver, United States of America                                                                                               systems. RTD TRANSIT contracted
                                                                                                                                  with 21 Century Rail Corporation for
                                                                                                                                                                              support and general standards. There
                                                                                                                                                                              was a request for a fixed contact wire
                                                                                                                                                                                                                         designed by K+M and our US partner
                                                                                                                                                                                                                         manufactured them locally. The
                                                                                                                                  the construction and the first fifteen      suspension system on low speed on-         multifunctionality of the ARCAS
                                                                                                                                  years of operation of the line, as a        street running sections and a tension      system allows for a flexible response
                                                                                                                                  ‘turnkey’ operation. 21 Century             and weight regulated catenary system       to customer’s requirements as well as
                                                                                                                                  operates and maintains the line under       with messenger and contact wire on         the compatibility of the new catenary
                                                                                                                                  its own management, separately from         sections with segregated alignment.        technology with the existing overhead
                                                                                                                                  the rest of RTD TRANSIT.                    For safety reasons double insulation       system even answering cost
                                                                                                                                                                              of the system was specified at various     effectively particular requirements.
                                                                                                                                  System characteristics with                 locations. The system varies between       K+M have the know-how in designing,
                                                                                                                                    relevance to overhead wiring              an application with fix and movable        implementing and installing and is
                                                                                                                                    Rolling Stock: 6 axle electric            messenger clamps.                          able to deliver quickly individual
                                                                                                                                    articulated light rail vehicles, partly                                              technical solutions together with local
                                                                                                                                    operating in multiple units               Requirements of the Catenary               partners.
                                                                                                                                    Maximum speed: 55 MPH                       System
                                                                                                                                    Current system: 750V DC
                                                                                                                                    Temperatures: -25o to +105o F             Operational
                                                                                                                                    Diameter contact wire: 350 MCM              Making best use of possible
                                                                                                                                    (178mm2) (13,3 kN) Bronze 80                maximum speeds, without the
                                                                                                                                    Diameter messenger wire: 500                hindrance from thermal expansion
                                                                                                                                    MCM (253 mm2) (26,6 kN) HD                  of contact wires, especially in
                                                                                                                                    Copper                                      curves and on viaducts.
                                                                                                                                    System height: 15“ to 48“                   Minimum headways with uniform
Denver, in the Rocky Mountain West,        first established in 1994, 44 years        vehicles, to be maintained, cleaned           Insulators: synthetic double                contact pressure of the current
is the capital city of Colorado, and the   after the last streetcar line stopped      and inspected in an additional light rail     insulated                                   collector at the contact wire, which
gateway to the entire western region       operations. The initial LRT route was      maintenance facility.                         Contact wire height above top-of-           means no bouncing of the current
of the USA. Its metropolitan area has      the 5.3-mile-long Central Corridor line.                                                 rail: 18'                                   collector.
a population of 2.4 million. The           RTD’s second light rail line with          The Transportation Expansion Project          Depot: Single wiring
building boom in recent years has          service along the Southwest Corridor       T-REX was the result of a unique                                                        Urban Environment
seen Denver more than double in            opened in 2000, a third one – already      partnership between the Colorado                                                          Minimal visual impact and best fit in    Other applications of K+M catenary
population since 1960. Denver’s            equipped with K+M overhead wiring          Department of Transportation, the                                                         with new civil works in concrete.          systems for light rail in the USA
architecture reflects the city’s three     components! – has been serving the         Regional Transportation District (RTD)                                                                                               and Canada
boom periods: Victorian, when silver       Central Platte Valley since 2002.          which is responsible for public                                                         Maintenance                                  1996 Spadina Line, Toronto
was discovered; turn-of-the-century,       Currently Denver’s LRT system              transport in the Denver Metropolitan                                                      Minimum effort for maintenance             2002 Light Rail System Regional
when gold was discovered and               consists of a 27-mile-long network         area, the Federal Highway                                                                 Long lifecycles of system                  Transportation District (RTD)
contemporary.                              with 32 stops.                             Administration and the Federal Transit                                                    components including contact               Denver, Colorado
                                                                                      Administration.                                                                           wires                                      2002 Light Rail System NJ
Unlike some Western cities, Denver         In December 2006, T- REX created a                                                                                                                                              TRANSIT, Hudson to Bergen, New
has a large central downtown area,         further major milestone when the           The line was the first in the United                                                    Technical Solution                           Jersey
the tenth largest in the U.S. This         Southeast Corridor Light Rail opened       States to be built under a Design-                                                      As the supplier, K+M converted the           2002 Light Rail System
bustling area is centred around            to the public. This line built mostly      Build-Operate-Maintain (DBOM)                                                           supporting catenary girders according        Sacramento Regional Transit
pedestrian promenades and the              along existing highways, has a length      arrangement. Based on functional                                                        to the electro-mechanical specifica-         District (RJ), Corridor Project
nation’s largest city park system.         of 19 miles and includes 13 stops. It      specifications prepared by                                                              tions into technical type drawings. The      California
Down every street there are                connects the two major employment          government planning authorities, the                                                    modular cantilever system ARCAS              2003 Light Rail System
magnificent mountain views.                centres in the Denver metropolitan         preferred consortium should be able                                                     (Adaptable Railway Cantilever                Sacramento Regional Transit
                                           area, Denver’s downtown and the city       to offer and carry out the detail design                                                System) facilitates the use of light and     District (RJ), Brighton to Watt,
Regional Transportation District           of Centennial. This network extension      as well as the turnkey construction of      Catenary System                             implementation friendly components,          California
  Denver (RTD) and the T- REX              is fully compatible with the existing      the envisaged infrastructure and            The functional specification roughly        using a minimum quantity of single
  Project                                  light rail system. The new line is         rolling stock. Due to this procedure, it    defined the requirements for the            elements as well as the plug-in
RTD’s Light Rail Transit (LRT) was         served by 34 additional light rail         was possible to accelerate and to           supporting catenary girders                 system technology. Other
                                                                                                                                                                              components such as the polygonal

                                                                                                                                                                                                                                                                   11/ 2006 Y00 041 002
                                                                                                                                                                                              Kummler+Matter Ltd          Telephone +41 44 247 47 47
                                                                                                                                                                                              Hohlstrasse 176             Facsimile +41 44 247 47 77
                                                                                                                                                                                              CH-8026 Zurich              Email     kuma.zuerich@kuma.ch
                                                                                                                                                                                              Switzerland                 www.kuma.ch

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