American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 149

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METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS
DE304.09 9-144 Revision 4 : 05/09/12
Metro Baseline Re-Baseline: 04/29/10
are located.
4. The ETS Blue Line Stations for aerial stations and bridges shall remove
power simultaneously from the two respective tracks
5. An ETS BLS shall also be provided at each tunnel cross passage, one for
each track, and shall remove power from the respective track.
6. An ETS-F (emergency trip) shall be located at each entrance of each at-
grade TPSS. Each ETS-F will trip all the breakers internal to the TPSS both
at High Voltage and DC voltage levels. In addition, it will trip the DC breakers
of the adjacent TPSS that are connected at DC level with the TPSS in
question.
7. Each BLS and ETS-F shall be provided with a mechanical padlockable lock
out, which shall prevent the closing of the associated breakers. These
breakers shall only be allowed to reclose once the local lock-out is removed
and after a reset command given by ROC.
9.18.7 Trainway Feeder and Emergency Back-up Power Supply
Note: The Criteria described on this section involve both the TPSSs High Voltage
and the Station Low Voltage Systems. These two disciplines shall coordinate the
Design in order provide a combined system that shall meet the Criteria here
described
A. Trainway Feeder
1. Each TPSS providing power to underground stations shall have a separate
and independent Incoming High Voltage Switchgear powered by a trainway
feeder, in addition to the local Incoming High Voltage Switchgear directly
powered by the utility. The trainway feeder shall consist of one set of High
Voltage cables installed along the tunnels, and connected to all the involved
TPSSs.
2. The trainway feeder shall be able to be powered from the incoming utilities
of two different TPSSs. One of these TPSS shall provide power to the
trainway feeder under normal operation, while the other one shall be
available as a back-up.
3. The trainway feeder shall also be able to be powered by an Emergency
Diesel Generator as part of the Emergency Back-up Power System – EBPS,
described in the following section.
4. The three possible sources of power to the Trainway feeder – two different
TPSSs and the Emergency Diesel Generator - shall be interlocked to assure
that only one of them can be connected to the trainway feeder at any time.
Such interlocking shall be hardwired with a fail-safe design. Fail-safe design
means that in the occurrence of any relay malfunction and/or open circuit in
any part of the interlocking circuits, the configuration of the system shall not
be allowed to change.
5. Each underground station shall be able to have all of its loads fully powered
by either its local incoming utility supply or by the trainway feeder.
6. Independent auxiliary transformers shall be connected separately to each
one of the alternative power sources – local utility and trainway feeder.
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