American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 141)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-136 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

The Yard PA system shall be provided in accordance with Public Address System

(PA).

Primary paging zones in the yard shall be:

• Yard Track Area

• Vehicle Maintenance Shop

• Maintenance of Way

• All Call.

9.17.6 SCADA

The SCADA subsystem shall provide remote monitoring of Yard alarms at central

control. Among the alarms to be monitored are:

• Selected traction power alarms

• Fire detection and suppression

• Selected communications subsystem alarms

In addition, operating parameters of selected Yard systems may be monitored

and/or controlled at central control.

9.17.7 Intrusion Detection

All Intrusion detection in the Yard area shall be annunciated at central control.

9.17.8 Fire Detection and Suppression Monitoring

All fire detection and suppression monitoring devices in the Yard area shall be

annunciated locally at the associated EMP and remotely at central control and in the

Yard control room.

9.18 TRACTION POWER AND DISTRIBUTION SYSTEM

9.18.1 General

The following criteria apply to the Traction Power and Distribution System that

supplies power for the operation of the trains on Metro Rail Lines. Power to the

trains shall be supplied at a nominal voltage of 750VDC provided by Traction Power

Substations (TPSSs) located along the alignment of each line.

The TPSSs shall step down and rectify the high voltage 3-phase AC power received

from the local Utilities to the nominal 750VDC required to run the trains. The positive

polarity of the DC system shall be distributed to the trains from the TPSSs through

feeder cables connected to a Third Rail for Heavy Rail Systems, or an Overhead

Catenary System (OCS) for Light Rail Systems. Power from the Third Rail shall be

transmitted to the vehicles through special collecting shoes installed on bottom part

of the vehicles. Power from the OCS shall be transmitted to the vehicles through

pantographs installed on top of the vehicles. The negative polarity of the DC system

shall follow a return path from the vehicle wheels along the running rails and back to

the TPSS through negative return cables.

For underground stations and tunnel portals, the TPSSs shall also distribute high

voltage 3-phase AC power to Auxiliary Transformers that shall provide 480VAC to a

low voltage distribution system. When feasible and convenient, TPSSs shall also

provide low voltage power to at-grade stations through auxiliary transformers.

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