American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 154)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-149 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

locate a gap in the normally accelerating zone, and at gap locations other

than at stations, the gap shall be of special design to prevent interruption of

power to trains during normal operation.

D. Overhead Contact System (OCS)

1. General

a. The OCS includes the Catenary system, the physical support structure

and the associated feeder system.

b. The Catenary system consists of the conductors, including the contact

wire and supporting messenger (where used); in-span fittings; jumpers;

conductor terminations; and associated hardware located over the track

and from which the vehicle draws power by means of physical contact

between the pantograph and contact wire. The Catenary system shall

provide for satisfactory current collection under all operating conditions.

See Section 10 Operations.

c. The physical support structure consists of foundations, poles, guys,

insulators, brackets, cantilevers, and other assemblies and components

required to support the Catenary system in the appropriate configuration.

The support system shall support the Catenary system in accordance

with allowable loading, deflection, and clearance requirements. The

supports throughout the system shall incorporate double insulation in

accordance with the requirements of CPUC General Order 95. Structure

grounding and bonding measures shall be provided in accordance with

corrosion control and safety requirements.

d. The feeder system consists of the feeder conductors, jumpers;

disconnect switches, ductwork, and associated hardware that feed the

power to the Catenary system. The feeder system in combination with

the Catenary system shall provide for the supply of traction power to the

vehicles within the allowable voltage limits. The design for all feeders

and jumpers shall be sized; based on their respective current carrying

capabilities, the wires to which they are attached, and the power

requirements of the system.

e. Electrical continuity shall be provided in the OCS from substation to

substation. At the substations, the Catenary system continuity shall be

sectionalized to provide isolation of each electrical section. An

arrangement providing continuity and flexibility for sectionalization of the

OCS while any mainline or substation is undergoing repair or

maintenance shall be incorporated. This will be accomplished through

the application of both electrically and manually operated outdoor and

indoor types of disconnect switches as required for operations and

maintenance. Between substations the continuity shall be accomplished

by insulated or un-insulated Catenary overlaps with continuous jumper

arrangements, or section insulators with jumpers and disconnect

switches and jumper arrangements.

f. The design of the overhead contact system shall be based on technical,

operation and maintenance requirements, aesthetics, and economic

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