34 21 35 emergency and transfer trip system 21...related item of work as indicated in the bid...

SECTION 34 21 35

EMERGENCY AND TRANSFER TRIP SYSTEM

RELEASE – R3.2 SECTION 34 21 35 BART FACILITIES STANDARDS ISSUED: DECEMBER 2020 PAGE 1 OF 41 STANDARD SPECIFICATIONS

PART 1 – GENERAL

1.01 SECTION INCLUDES

A. Submittal Requirements

B. ETTS Functional Requirements

C. Emergency and Transfer Trip Cabinet

D. Emergency Trip Panel

E. ETTS Logic Controller

F. ETTS Input/Output Module (IOM) and Other Equipment

G. Blue Light Stations

H. Equipment and Requirements in Existing Old TP Facilities

I. Equipment and Requirements in Train Control Rooms (TCRs)

J. Interfaces and Requirements in New Substations Provided by Others

K. Software Requirements

L. Factory Testing

M. Installation

N. Field Testing

O. Commissioning Support

1.02 RELATED CONTRACT SPECIFICATIONS SECTIONS

A. Section 01 11 00 Summary of Work

B. Section 01 33 00 Submittal Procedures

C. Section 01 33 23 Shop Drawings, Product Data, and Samples

D. Section 01 43 00 Quality Assurance

E. Section 01 45 00 Quality Control

F. Section 01 45 24 Testing Program Requirements



G. Section 01 78 23 Operation and Maintenance Data

H. Section 01 78 39 Project Record Documents

I. Section 01 79 00 Demonstration and Training

J. Section 20 50 13 Raceways for Facility Services

K. Section 20 40 13 Identification for Facility Services

L. Section 26 05 24 Low Voltage Wires and Cables

M. Section 26 05 26 Grounding and Bonding for Electrical Systems

N. Section 27 13 01 Communication Cables and Related Equipment

O. Section 27 30 01 Telephone Systems

P. Section 34 21 01 General Requirements for the Traction Power System

Q. Section 34 21 11 Multi-Function Protection Relay Equipment for DC Feeder Circuit Breakers

R. Section 34 21 25 DC Switchgear

S. Section 34 21 33 Traction Power Control, Monitoring, and Display Panel and Related Equipment

T. Section 34 21 40 DC Control Power System

U. Section 34 21 50 Common Materials and Methods for Traction Power

V. Section 34 21 70 Traction Power Facilities Installation Requirements

W. Section 34 21 75 Traction Power Facility Functional Factory Testing

X. Section 34 21 80 Traction Power System Field Acceptance Testing

1.03 MEASUREMENT AND PAYMENT

Measurement: Separate measurement or payment will not be made for work required under this Contract Specifications Section. All costs in connection with the work specified herein will be paid for as part of the Contract lump sum price for the related item of work as indicated in the Bid Schedule of the Bid Form.

1.04 ABBREVIATIONS

A. BLS Blue Light Station

B. CR Contact Rail



C. DC Direct Current

D. DIOM Diagnostic Input/Output Module

E. DPDT Double Pole, Double Throw

F. DPST Double Pole, Single Throw

G. EBP Emergency Backup Panel

H. ET Emergency Trip

I. ETP Emergency Trip Panel

J. ETS Emergency Trip Station

K. ETTC Emergency and Transfer Trip Cabinet

L. ETTS Emergency and Transfer Trip System

M. FAT Factory Acceptance Testing

N. FEC Fiber Entry Cabinet

O. FO Fiber Optic

P. LC Logic Controller

Q. FOT Fiber Optic Transceiver

R. GBS Gap Breaker Station

S. GRS Galvanized rigid steel

T. ICS Integrated Computer System

U. ID Identification

V. I/O Input/Output

W. IOM Input/Output Module

X. IP Internet Protocol

Y. LV Low Voltage

Z. MPR Multi-Function Protective Relay

AA. NC Normally Closed

BB. NO Normally Open



CC. NYMS New Yard Management System

DD. OCC Operations Control Center

EE. O&M Operation and Maintenance

FF. PS Power Supply

GG. PT Platform Trip

HH. PTPSS Portable Traction Power Substation

II. PTS Platform Trip Station

JJ. SCADA Supervisory Control and Data Acquisition

KK. SIT System Integration Testing

LL. SSWP Site Specific Work Plan

MM. TCR Train Control Room

NN. TETP Temporary Emergency Trip Panel

OO. TPF Traction Power Facility

PP. TPSS Traction Power Substation

QQ. TT Transfer Trip

RR. TTS Transfer Trip System

SS. USB Universal Serial Bus

TT. V Volt

UU. YT Yard Trip

VV. YTS Yard Trip Station

1.05 REFERENCES

A. Electronic Industries Association (EIA):

1. EIA /TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange

2. EIA 310-E Cabinets Racks, Panels, and Associated Equipment



B. International Electrotechnical Commission (IEC):

1. IEC 60068 Environmental Testing

2. IEC 60255 Measuring Relays and Protection Equipment

3. IEC 60529 Degrees of Protection Provided by Enclosures

4. IEC 61000 Electromagnetic Compatibility

C. Institute of Electrical and Electronics Engineers (IEEE):

1. IEEE C2 National Electrical Safety Code (NESC)

2. IEEE 802.3 Standard for Ethernet

3. IEEE C37.90 Standard for Relays and Relay Systems Associated with Electric Power Apparatus

4. IEEE C37.90.1 Standard for Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus

D. National Electrical Contractors Association:

1. NECA/FOA 301 Standard for Installing and Testing of Fiber Optic Cables

E. National Fire Protection Association (NFPA):

1. NFPA 70 National Electric Code

2. NFPA 130 Standard for Fixed Guideway Transit and Passenger Rail Systems

F. Telecommunications Industry Association (TIA):

1. TIA-455-C General Requirements for Standard Test Procedures for Optical Fibers, Cables, Transducers, Sensors, Connecting and Terminating Devices, and Other Fiber Optic Components

2. TIA 455-13 Visual and Mechanical Inspection of Fiber Optic Components, Devices, and Assemblies

3. TIA-526-7-A Measurement of Optical Power Loss of Installed Single-Mode Fiber Cable Plant

4. TIA-526-14-C Optical Power Loss Measurement of Installed Multimode Fiber Optic Cable Plant

5. TIA-568.0-E Generic Telecommunications Cabling for Customer Premises



6. TIA-568.1-E Commercial Building Telecommunications Infrastructure Standard

7. TIA-568.2-D Balanced Twisted-Pair Telecommunications Cabling and Components Standards

8. TIA-568.3-D Optical Fiber Cabling and Components Standard

9. TIA-606-C Administration Standard for Telecommunications Infrastructure

10. TIA-607-D Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises

G. Underwriters Laboratories (UL):

1. UL 94 Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances

2. UL 595 Standard for Safety Marine-Type Electric Lighting Fixtures

1.06 SYSTEM DESCRIPTION

General: The emergency and transfer trip system (ETTS) provides fast and reliable means of de-energizing the inbound and outbound 1000 VDC contact rail system in cases of faults or emergency. The ETTS features redundant fiber optic cable loops that interconnect logic controllers (LCs), that issue circuit breaker trip signals to quickly de-energize required contact rail sections upon activation of a wayside platform trip station (PTS) or emergency trip station (ETS). The ETTS provides a transfer tripping function whereby fault detection in one traction power facility (TPF) results in automatic tripping of the circuit breakers in other TPFs supplying the same contact rail section(s). The main system components, by type, and main include:

A. Emergency and Transfer Trip Cabinet (ETTC): These cabinets are located in traction power substation (TPSS) and gap breaker station (GBS) DC houses, and contain LCs, input/output modules (IOMs), and in the case of new or replaced TPFs, a diagnostic input/output module (DIOM) for interface with the TPF site’s blue light station (BLS). The LCs receive and process trip signals and issue non-reclosing or auto-reclosing-enabled circuit breaker trip requests (depending on the source of the request) to DC feeder breakers to de-energize a target contact rail section.

B. Emergency Trip Panel (ETP): ETPs are located in train control rooms (TCRs). ETPs receive emergency trip signals from existing platform trip stations (PTSs) and wayside emergency trip stations (ETSs) and convey these signals through IOMs and a fiber optic cable link to an associated ETTC located in an adjacent traction power facility’s DC house.



C. Platform trip station (PTS): PTS provide an emergency means of de-energizing the 1000 VDC contact rails at a passenger station platform. PTSs with pushbuttons are existing devices located on the passenger platforms of existing BART stations. PTS pushbutton activation maintains a standing trip command until the pushbutton is reset, so the circuit breakers shall be forced to remain open and the contact rail section de-energized until the PTS is manually reset. The standing PTS signal is sent to an ETP in the nearest TCR, that conveys the signal to a traction power facility’s ETTC. The ETTC’s LC then sends trip requests to appropriate DC feeder breakers to de-energize a target contact rail section.

D. Emergency trip station (ETS) on the mainline and in yards:

1. Mainline ETS pushbuttons are incorporated in blue light stations (BLSs) located as follows:

a. In tunnels alongside cross-passage and exit doors, in both trainways.

b. Emergency access to trainway, at a location inside the BART right-of-way, alongside the emergency access door or gate, except where an emergency access is within 100 feet walking distance of a trainway Blue Light Station (excepting underground Blue Light Stations), and the trainway Blue Light is within sight from the emergency access.

c. In the underground storage and tail tracks, alongside each trainway.

d. In storage and tail track locations, where such trainways are in open cuts. Where line storage and tail tracks are at grade or in aerial structures, Blue Light Stations are not required.

e. In open cut trainways, alongside each trainway, in which the wall height of the cut exceeds 20 feet, and the length of the cut exceeds 1,000 feet.

f. In turnaround tracks, alongside each trainway.

g. In the immediate vicinity of the line maintenance pits,

h. At traction power substations, switching stations, and sectionalizing stations just inside the main entrance gate

2. Yard ETS pushbuttons are incorporated in blue light stations (BLSs) located as follows:

a. At both ends of storage track arrays, and at intermediate points.

b. At the edge of transit vehicle maintenance shop apron.

c. At emergency access to the yard, including test track areas, except when the entrance is within 100 feet of a Blue Light Station in the yard, and that Blue Light Station is within line of sight and is not normally obscured by transit vehicles.

d. Within 50 feet of vehicle and passenger crossings.

e. In the yard tower and the car wash facility.



f. Throughout the yard such that one is easily located and accessible from any location under any circumstances.

g. At traction power substations and high voltage substations.

3. The ETSs do not maintain a standing trip command, as their pushbutton is with a spring return. Therefore, the circuit breakers supplying the de-energized contact rail may be reclosed remotely, following the ETS pushbutton release. Existing mainline ETS systems may be based on either electromagnetic relays and copper pilot wires or solid-state logic controllers and fiber optic cables. The interfaces of the existing ET system with the existing (original) TP facilities which are being replaced shall be de-commissioned, while otherwise the existing ET system along the tracks and in the TCRs shall be retained and incorporated in the new ETTS specified herein

4. Newer ETSs on BART connected in parallel in a common trip circuit are equipped with an auxiliary contact, which is used by SCADA for identifying the ETS that has been activated. Older ETSs do not have such a contact, however, and individual ETS identification upon activation is not required for them.

5. IOMs housed in emergency trip panels in train control rooms are used to interface the new ETTS with the existing wayside ETS circuits. Each such IOM is connected via a fiber optic link to a LC in an ETTC in the nearest traction power substation. The LC initiates DC circuit breaker tripping without automatic reclosing, as needed to de-energize the target contact rail section(s). The same IOM in the ETP can be used for both the PTS and ETS interfaces.

E. ETS at a New or Replaced Traction Power Facility: An ETS pushbutton is incorporated in a BLS located in the fenced area of an above-ground TPSS or GBS, or as indicated in the Contract Drawings in the case of underground facility. The hard-wired circuit from the ETTC to the TP site ETS is supervised using a diagnostic input/output module (DIOM) in the ETTC. The circuit’s integrity is monitored by circulating milliamp current through it passing also through an analog input of the DIOM; and an alarm is raised if circuit discontinuity is detected. TP site ETS activation issues:

1. Non-reclosing trip commands to the 34.5 kV AC circuit breakers of the TPSS.

2. Non-reclosing trip commands 1000 VDC circuit breakers in the TPSS or GBS.

3. Non-reclosing trip commands to 1000 VDC feeder circuit breakers in the adjacent TPFs that supply power to any contact rail sections in the vicinity of the traction power facility where the emergency trip command originates.



F. Transfer Trip System (TTS) for Short Circuit Faults: When an overcurrent device in a TPSS or GBS senses an electrical fault on the 1000 VDC distribution system, it trips its own circuit breaker and at the same time transmits a transfer trip signal via the ETTS to trip corresponding circuit breakers at adjacent TPSSs and GBSs connected to the same contact rail section, in order to ensure the de-energizing of that section. All circuit breakers should attempt to automatically reclose once the circuit breaker reclosing systems sense that the fault has been cleared. The existing TTS uses along-track pilot wires and electromechanical relays in the traction power facilities. It will be replaced by the new ETTS described herein.

1. In new or replacement TPFs, fault detection at the initiating circuit breaker will be initiated by any one of instantaneous over-current, time over-current, or current rate-of-rise protective functions (Devices 150/151) of the multi-function protective relay (MPR) of the DC feeder circuit breaker, as specified in Contract Specifications Section 34 21 11, DC Circuit Breaker Multi-Function Protection Relay; and by the direct acting series trip Device 176, as specified in Contract Specifications Section 24 21 25, DC Switchgear.

2. In existing TPFs included in the ETTS, the existing over-current type protective relaying and the circuit breakers’ series trip Device 176 will be used for the TT interfaces with the new ETTS.

G. ETTS for DC Structure Alive Faults: For new or replaced TPFs, in the event of DC enclosure alive fault in the DC feeder circuit breakers detected by a Device 164 relay, the ETTS will trip open in non-reclose mode the DC feeder circuit breakers in the facility where the trip originates and in the other TPFs supplying the same contact rail sections, in order to de-energize the load side of the DC feeder breakers in the faulted TPF. Circuit breakers in the facility where the 164 is activated will also be tripped by the facility lockout relay.

H. ETTS Equipment Trouble Alarms: in new or replaced TP facilities, ETTS Equipment Trouble Alarms will be displayed on the alarm screens of the C02 panels, and sent to the BART OCC. In existing TP facilities, these alarms ae to be hard-wired to an existing SCADA circuit for remote indication to the OCC.

I. ETTS Activation Alarms: these alarms identify the source and type of a circuit breaker tripping by the ETTS. In new TP facilities they are to be sent over an Ethernet link to the control network switch in the C04 cabinet, from where they will be routed for display on the C02 panel’s alarm screen and sent also to the OCC. Logic controllers in existing TP facilities are not required to report such alarms.

J. Inter-Facility Communications: ETTS communications between different facilities are to be accomplished by using the BART fiber optic cable network. The cables are single mode type, and either spare fibers in existing cables or unused new cables are to be employed for this purpose, depending on the situation.

K. See Standard Drawing TPS98 for a typical ETTS schematic diagram.



1.07 WORK OVERVIEW

A. Equipment: Provide equipment specified herein and as indicated on the Contract Drawings, including ancillary and supporting devices, to supply a fully functional ETTS comprising emergency trip and transfer trip zones as shown on the Contract Drawings. The ETTS shall incorporate the circuit breaker tripping logic for all conditions, as shown and stated in the Contract Documents. The ETTS shall generate ETTS-associated alarms, locally at TPFs and remotely at the BART OCC, as indicated.

B. Factory Testing: Factory-test each TP facility’s ETTS system to demonstrate correct operation of its equipment and associated ETTS communication loop and common-to-the loop other facilities, as shown on the Contract Drawings. The factory testing shall be in accordance with the requirements of Article entitled Factory Acceptance Testing under Part 3 herein; and of Contract Specifications Section 34 21 75, Traction Power Facility Functional Factory Testing.

C. Installation: Install ETTS equipment and associated raceways and accessories in the TPSS, GBS, and TCR facilities per requirements of Article entitled Installation under Part 3 herein, and as required to implement the ETTS as defined on the Contract Documents. Coordinate with the District, and with others, as needed, to implement a complete and operational ETTS.

D. Field Testing: Field-test the ETTS as a standalone system in accordance with the requirements of Article entitled Field Testing under Part 3 herein.

E. System Integration Testing (SIT) and Commissioning: Perform SIT in accordance with the ETTS-related requirements of Contract Specifications Section 34 21 80, Traction Power System Field Acceptance Testing. Assist the District with the ETTS commissioning.

1.08 SUBMITTALS

A. General: Refer to the Contract Specifications Section 01 33 00, Submittal Procedures, and Section 01 33 23, Shop Drawings, Product Data, and Samples, for submittal requirements and procedures.

B. Submit detailed design drawings. The drawings shall cover all equipment supplied by the Contractor, including functionality, wiring and communication interfaces, modifications to equipment in existing TPFs and TCRs, software documentation, new equipment installation, and ETTS enclosures and raceways. For parts and aspects of the ETTS for which detailed Contract Drawings have been provided, these drawings shall be re-used except for possible corrections for errors and omissions. In the case of work in existing TPFs and TCRs, the drawings shall include modifications accounting for field conditions discrepant from those indicated on the Contract Drawings. The detailed design drawings shall include the following:

1. System-wide schematic diagrams showing the ETTS communication loops, equipment and main interfaces with the TP switchgear and wayside ET systems and devices;



2. Wiring diagrams for the ETTC- and ETP-based equipment. Include wiring interfaces internal to the ETTCs and ETPs including terminal block point designations, wiring interfaces with the DC switchgear and other equipment in TP facilities, and with the existing emergency trip systems in the TCRs;

3. Detailed design drawings for modifications to existing TPFs included in the ETTS communications loops, as required to install and interface the new ETTS equipment with the existing TP equipment. Include installation design for the new equipment enclosures and raceways, installation of new devices in existing DC switchgear cubicles, and wiring modifications to existing relaying and circuit breaker controls;

4. Detailed design drawings for modifications in the TCRs used by the ETTS, including installation design for the new raceways and ETP, and the new wiring and related interfaces with the existing PTS and ETS circuits;

5. Facility-specific ETTC and ETP designs, including scaled internal equipment layouts complete with devices and wiring provisions;

6. Ethernet interface diagrams between LCs and substation C04 network equipment, LC’s communication protocols, and Ethernet IP settings;

7. ETTS I/O point schedules and alarm lists for display on the C02 panel’s alarm screen in new TPFs, and for sending to the BART OCC;

8. Fiber-optic cabling interfaces at the BART FECs in the TCRs, including assignment and utilization of fibers of existing BART cables, and interconnection details;

9. Circuit breaker trip logic tables for the TP facilities included in the ETTS;

10. ETTS logic flow charts and diagrams, documenting the application software development and operating logic for LCs and DIOMs.

11. Drawings for any required modifications to emergency trip circuits in TCRs and to equipment in existing TP facilities, associated with an interim ET system configuration. Such configurations include a TPSS taken out-of-service for replacement and its sectionalizing gaps in the contact rails jumpered across for electrical continuity; and operations with partially completed ETTS loops, as indicated on the Contract Drawings.

C. Submit equipment installation instructions.

D. Submit product data sheets with functional descriptions and technical parameters for ETTS related equipment including LCs, IOMs, DIOMs, FOTs, BLSs, fiber-optic cables, fiber-optic connectors, terminal blocks, conduits, control wiring and control cables, control relays, pushbutton switches, low voltage circuit breakers, cabinets and enclosures, and equipment mounting hardware and materials. Include:

1. Hardware reliability and performance certifications



2. Input/output characteristics

3. Selected device options, settings, and ratings

E. Submit the following design documentation:

1. Design calculations for the sizing of the resistors (in-series and end-of-line) for the supervised trip circuit from the DIOM in a TP facility’s ETTC to the TP site BLS. Calculations shall include all DIOM parameter settings.

2. Design calculations for the selection of fiber-optic transceivers for the single-mode LCs, DIOMs and IOMs, and for the fiber-ready boards for the multi-mode IOMs. The design calculations and corresponding transceiver choices shall be such as while the transceivers have adequate reach, there are no optical signal reflections at the shorter distances, in order to avoid the resorting to fiber attenuators.

3. Design calculations for demonstrating that the installation of ETTS cabinets, raceways and devices meets the seismic requirements of the Contract.

4. Equipment data sheets for logic controller, IOMs, and transceivers demonstrating that equipment meets requirements noted in Article 2.02A.

5. ETTS software code documentation for logic controllers and diagnostic IOMs, including explanatory narrative, logic diagrams, software programming code, software and hardware settings for all devices, and security passwords.

6. Replacement drawings for existing TP facilities and TCRs, where existing equipment and circuits have been modified, or new ETTS devices, cabling and raceways have been installed.

F. Warranty certifications.

G. Factory and Field Test Reports: Submit factory and field test plans, test procedures, test data forms, and test reports in accordance with Contract Specifications Section 01 45 24, Testing Program Requirements, applicable requirements specified herein, Section 34 21 75, Traction Power Facility Functional Factory Testing, and Section 34 21 80, Traction Power System Field Acceptance Testing.

H. Operation and Maintenance (O&M) Manuals: Submit O&M manuals in accordance with Contract Specifications Section 01 78 23, Operations and Maintenance Data.

I. Training Materials: Submit training materials in accordance with Contract Specifications Section 01 79 00, Demonstration and Training.

J. Record Drawings: Submit Record Drawings in accordance with Contract Specifications Section 01 78 39, Project Record Documents.

K. Spare Parts: Submit a recommended spare parts list in accordance with Contract Specifications Section 01 78 44, Spare Parts and Maintenance Materials, and per the requirements specified in Article entitled Spare Parts under Part 2 herein.



1.09 QUALITY ASSURANCE

A. Electrical components, devices, and accessories shall be listed and labeled in conformance with NFPA 70, Article 100. Electrical components, devices, and accessories shall comply with NECA’s National Electrical Installation Standards.

B. Refer to Contract Specifications Section 01 43 00, Quality Assurance, and Section 01 45 00, Quality Control, for hardware quality assurance requirements.

C. Products shall be manufactured by firms regularly engaged in the manufacture of products described in this Section.

D. Field testing shall be performed by persons having five or more years of relevant testing experience.

1.10 DELIVERY, STORAGE, AND HANDLING

A. Equipment in storage before shipment and during installations shall be protected from physical damage and from the environment.

B. Equipment shall be weatherproofed for shipment. Connection openings shall be closed to prevent entrance of foreign material during shipment and storage.

C. Material and equipment shall be delivered as completely assembled as practicable within shipping and handling limitations, ready for installation or storage per manufacturer’s instructions.

D. Equipment shall be handled and stored in conformance with manufacturer’s instructions. One copy of these instructions shall be included with the equipment at time of shipment.

1.11 WARRANTY

A. A warranty for the ETTS components shall be provided and signed by the manufacturer agreeing to correct system deficiencies and replace components that fail in materials or workmanship. The warranty shall be for the period between installation and two years from the date of entry of the system into revenue service.

PART 2 – PRODUCTS

2.01 FUNCTIONAL REQUIREMENTS

A. Provide equipment, accessories, and incidentals necessary to implement a ETTS system for the new traction power facilities and designated existing TPFs. The ETTS shall be fully functional, as indicated on the Contract Drawings and as specified herein. Equipment shall include:



1. Emergency and Transfer Trip Cabinets (ETTCs) and Emergency Trip Panels (ETPs). In traction power facilities, provide ETTCs complete with logic controllers (LCs), input/output (I/O) modules, a DIOM in the case of a new or replacement TPF, fiber optic transducers, control power circuit breakers, inter-device wiring, fiber patch panels, fiber jumpers, and required ancillary equipment and accessories. In the DC switchgear and 64TC cabinets, provide IOMs and wiring accessories needed for interface with the DC circuit breakers, and Device 164 and Device 186 relays, respectively. In train control rooms, provide ETPs complete with I/O modules, fiber optic transceivers, terminal blocks, inter-device wiring, raceways to existing cabinets for the new wiring interfaces, control power circuit breakers, fiber patch panels, fiber optic cables to the FEC, and ancillary equipment and accessories to comprise complete and functional units.

2. TP Site BLSs. At each new TPSS provide a TP site BLS complete with an ETS with supervised circuit, and warning lights for DC switchgear frames alive/grounded status.

3. Interface Hard-Wiring. Provide hard-wiring and related appurtenances internal to ETTCs and ETPs, and wiring outside ETTCs and ETPs in the following areas:

a. Between IOMs located in the DC switchgear and the 1000 VDC feeder breakers’ protective relaying and controls. In the case of existing TPFs, the work shall include wiring modifications to the connection diagrams of the DC feeder circuit breakers, as needed to interface the ETTS with the breakers’ protective relaying and controls, and to disengage the existing ET and TT systems.

b. In new or replacement TP facilities, between an IOM for the ETTS in the 64TC cabinet and the Device 164 and 186 relays.

c. In new or replacement TP facilities, wiring of the trouble/alarm contacts of LCs, DIOMs and IOMs individually to the PLC in the C02 cabinet.

d. In existing TP facilities, wiring the trouble/alarm contacts of LCs and IOMs into a common circuit, to be connected to an existing SCADA circuit for remote alarm indication to the OCC.

e. In TCRs, wiring between the ETPs and the existing emergency wayside trip and platform trip circuits and devices.

f. In new or replacement TP facilities, wiring between the ETTC and the TP site BLS.

4. Fiber Optic Connections. FO based communications shall be provided between (a) LCs in different TP facilities in the same ETTS communications loop, (b) IOMs in the ETTC and IOMs in the DC switchgear and the 64TC cabinet in the same TP facility, and (c) DIOMs or IOMs in the ETTC, and IOMs in the TCRs, as indicated on the Contract Drawings. The FO communications between facilities shall be implemented by utilizing existing single mode FO cables laid by District. Regarding these cables the Contractor shall be responsible only for the interfaces, providing the jumpers, splice trays and other incidentals, and the overall design of the interface. FO links internal to the TP facilities and TCRs shall be by cables and accessories provided by the Contractor.



B. General ETTS Configuration. The ETTS shall be configured as a fiber-optic bi-directional loop-based system, where each loop includes the logic controllers (LCs) of two or more traction power facilities, as indicated on the Contract Drawings. A failure of any one fiber-optic segment of the loop shall not affect the proper operation of the ETTS.

C. Main Functionality. The LCs shall, through IOMs, trip open the required 1000 VDC feeder breakers in non-reclose or auto-reclose-enabled mode in accordance with the ETTS trip logic shown on the Contract Drawings. The non-reclose type trips shall de-energize the contact rails under emergency conditions, with the trip signals originating from platform trip stations, blue light stations, and DC switchgear ‘structure alive’ (Device 164) relays. Auto-reclose-enabled type trips are initiated by overcurrent or short-circuit fault detection, by the DC feeder circuit breakers’ protective relaying and the breaker’s instantaneous overcurrent release (Device 176). These types of trips shall allow attempts to reclose circuit breakers that have tripped on overcurrent detection.

D. Transfer Trip Test Switch. New DC feeder circuit breakers shall be equipped with transfer trip test switch located at the circuit breaker cubicle. The switch shall simulate an MPR transfer trip request for testing the logic and operation of the TT zone to which the breaker is connected. The LC shall be programmed to back-trip the circuit breaker from which the TT signal originates, to ensure proper transfer trip loop testing, as the TT test switch shall be wired to the ETTS only.

E. Interlock with the DC Feeder Breaker Position. Circuit breakers shall be tripped by the ETTS only when they are in the connected position. The ETTS shall not operate on circuit breakers that are in the test position.

F. Interface with the Device 164 Relay. Activation of the DC feeder circuit breakers ‘structure alive’ (Dev. 164) relay shall activate the ETTS, which shall then trip open all local and remote DC circuit breakers connecting contact rail sections supplied by the TP facility where the fault has been detected.

G. ETTS Alarms. The ETTS devices shall feature self-diagnostics capability and shall be equipped with form-c trouble/alarm contacts. The integrity of fiber optic (FO) communication and control circuits between network nodes shall be continuously monitored. In the event of FO circuit problem in an ETTS loop segment, a FO channel communication failure alarm shall be transmitted by the LCs in new TP facilities adjoining the faulted segment over Ethernet link to the control network switch in the C04 panel; and from there to the C02 panel’s PLC for processing and for display on C02 alarm screen and to the OCC. For the same type of fault detection, LCs and DIOM located in existing TP facilities shall be programmed to provide a discrete output contact, which shall be hard-wired to an existing SCADA circuit with a remote alarm indication to the OCC. Additional alarms generated by the ETTS shall be as follows:

1. ETTS Self-Diagnostic Alarms in New TP Facilities: The alarm contacts of LCs shall be hard-wired individually to the PLC in the C02 panel for display on the panel’s alarm screen, and shall be sent to the OCC. The self-diagnostic alarm contacts for ETTC IOMs and DIOMs shall be hard-wired to the LCs; LCs shall report these alarms via Ethernet interfaces to the PLC through the C04 control



network. These alarms shall be displayed at the C02 panel’s alarm screen; and shall be sent to the OCC.

2. ETTS Self-Diagnostic Alarms in Existing TP Facilities: The LC and IOM alarm contacts, along with the programmed output contact for communications channel failure of the LC, shall be paralleled and added to one existing SCADA alarm circuit for indication to the OCC. For TP facilities that had been equipped with an alarm station of the existing TT system, the existing ‘Transfer Trip System Failure’ alarm shall be used for this purpose. Otherwise, the alarm contacts of the ETTS devices shall be connected in parallel to the established alarm circuit of existing equipment, such as a summary ‘TPF Equipment Trouble’ alarm.

3. Hard-Wired Circuit Trouble Alarm for the TP Site BLS and BLS ETS Trip Button Activation: These alarms, generated by the DIOM in the ETTC, shall be hardwired to the ETTC LC. The ETTC power supplies’ and device server’s alarms shall also be hardwired to the ETTC LC. These alarms shall be sent via Ethernet interface to the C04 control network for reporting to the C02 PLC and displayed on the C02 alarm screen. From the PLC these alarms shall be sent to the OCC.

4. Communication Channel Failure between a DIOM in a TPSS and IOM in a TCR: The DIOM shall detect a failure of the communications link to the paired IOM in the TCR and generate corresponding alarm through one of its discrete outputs. In a new TPSS this alarm output shall be wired to the ETTC LC for reporting to the C02 PLC over C04 control network switch and for display on C02 alarm screen, and be sent the OCC. In case of an existing TPSS, this alarm shall be paralleled with the other ETTS alarms and sent to the OCC using an existing SCADA alarm circuit.

5. Emergency Trip Alarms: Such alarms shall be transmitted from the LC receiving the initial trip signal, assuming the LC is located in a new TP facility, over Ethernet link to the C04 control network switch, from where they shall be routed to the C02 panel PLC for processing and for display on C02 alarm screen, and shall be also sent to the OCC. To the extent possible, these alarms shall distinguish the trip source by type and location.

a. In case of a PTS-generated trip, the alarm shall identify the specific passenger station and platform.

b. In case of a TP site BLS generated trip, the corresponding TP facility shall be identified.

c. In case of a trip from a wayside ETS, if the ETS is on a dedicated circuit, its BLS shall be identified; if the ETS is in an existing circuit including more than one ETS, then the alarm shall identify the contact rail section from where the trip signal has originated.

d. In case of a Device 164 initiated trip, the TPSS where the fault has occurred shall be identified.

6. Transfer Trip Alarms: If the LC receiving the initial TT signal is in a new TP facility, an Ethernet alarm for initiated TT by a specific circuit breaker shall be



sent via the FO Ethernet link to the control network switch in the C04 panel; from where it shall be sent to C02 PLC for processing and for display on the C02 panel alarm screen, and to the OCC. If a LC is only receiving a TT alarm from another facility, an Ethernet alarm for such event shall be sent to the C02 alarm screen and to the OCC.

7. CR Gap Bypass Switches Status Indications: For TP substations equipped with contact rail (CR) gap bypass switches, the ETTS shall use inputs regarding the open/closed status of such switches to establish whether adjacent contact rail sections are linked electrically through the switch (which in turn affects the TT and ET logic). For this purpose, an auxiliary contact of the bypass switch operated at or near the switch’s open position shall be used, indicating a ‘Not Open’ switch status as logical equivalent of ‘Switch Closed’ status for the ETTS. The status of these switches as recognized by the ETTS shall be sent over the Ethernet connection of the LC to the C04 control network switch. From the latter, these indications shall be routed to the C02 panel PLC for processing and for display on its ETTS alarm screen, and shall be sent to the OCC.

H. ETTS Loop Related Communications. LC backbone communications between TP facilities included in the ETTS communication loops shall be via existing single mode fiber optic cables passing through train control rooms, with the cables between the train control rooms, and between train control rooms and TP facilities, being provided by others. The Contractor shall be responsible for providing the terminations and interfaces for these cables at the TP facilities and in the TCRs. In the TCRs, where interconnections shall be made in existing BART FECs, the Contractor shall be responsible for designing the interface, and for furnishing hardware and accessories required for making the interface. The testing of the optic fibers used for the ETTS shall be the responsibility of the Contractor.

I. ETTS Communications inside Facilities. Fiber optic communications between pairs of IOMs located within traction power facilities, and between logic controllers and C04 network switches shall be via multimode fiber optic cables and shall be provided by the Contractor. Fiber optic communications between an ETTC in a TP facility and an ETP in a TCR shall be via single mode fiber optic cables, with the portion of the cables from the BART FEC in the TCR to the ETP provided by the Contract. FO cable terminations in new facilities and at new ETTS equipment in existing facilities shall be by the Contractor. Terminations to in-service BART equipment in existing District facilities will be done by District personnel.

J. Interface with the Maintenance and Engineering Network Switch in New Facilities. Permanent but removable remote access shall be provided to the LC via its USB port (normally used for local computer/ laptop connection) from the maintenance network switch located in the C04 cabinet. The connection shall be by using two conversion devices located in the ETTC: USB Serial to 100BASE-T copper Ethernet converter (Device Server) and copper-to-fiber media converter. The latter shall be connected to the maintenance network switch through fiber optic cable.

K. Operations with Interim ETTS Configurations with Partial Loops and No PTPSS. Such temporary ETTS configurations are used for staggered-in-time replacements of old TP substations, where the final ETTS loop includes more than one old TPSS and when a portable TPSS (PTPSS) is not used. Instead, during the substation’s



absence its sectionalizing gaps in the contact rail system are jumpered for electrical continuity of the contact rail. For the interim configurations of this type provide the following:

1. A partial ETTS loop shall be activated and put into service upon the return to service of the first new/replaced TPSS of the final loop.

2. In the operation of an interim configuration with a partial loop, ET based non-reclosing breaker trips within the normal limits of the loop in its final configuration shall be achieved by a combination of the operation of the partial ETTS loop and the existing ET system, with additional interfaces between the two implemented as required.

3. With regards to transfer tripping instigated by short-circuit fault detection that cause auto-reclosing-enabled circuit breaker trips, the operation of the interim configuration shall be in accordance with the following rules:

a. If the fault is detected in a TP facility by a circuit breaker wired into the partial loop, the ETTS shall trip all other circuit breakers in the facilities participating in the partial loop, based on the TT logic as shown on the Contract Drawings.

b. In the item 3 scenario above, circuit breakers in facilities not yet part of the ETTS but which also must be tripped in order to de-energize the required contact rail section will be the District’s responsibility and will be tripped by the District’s ICS/SCADA system.

c. If the fault detection is only by a DC feeder breaker not yet part of the ETTS of the partial loop, it will be the responsibility of the District’s ICS/SCADA system to trip all DC circuit breakers as needed to de-energize to faulted contact rail section.

4. Plan and complete the ETTS work in the existing TP facilities of the same loop so that field testing, SIT and commissioning of the partial loop can be done as soon as the first new/ replaced TPSS of the final loop becomes available for service.

5. When a given ETTS loop reaches its final configuration remove from TP facilities and TCRs any equipment that had been installed, or required, only for the preceding interim loop configuration(s) and deliver equipment no longer needed to the District.

2.02 EMERGENCY AND TRANSFER TRIP EQUIPMENT

A. Logic controller, IOMs, and transceivers shall function properly operating in the following environmental conditions when tested per IEC 60068:

1. Cold: Equipment shall operate correctly at –40 degrees C, for 16 hours when tested per IEC 60068-2-1.

2. Damp Heat, Steady State: Equipment shall operate correctly at 40 degrees C. and 93 percent relative humidity, for 4 days when tested per IEC 60068-2.



3. Damp Heat, Cyclical: Equipment shall operate correctly during 6 cycles of heat variation from 25 degrees C. to 55 degrees C. at 95 percent relative humidity when tested per IEC 60068-2-30.

4. Dry Heat: Equipment shall operate correctly at 85 degrees C, for 16 hours when tested per IEC 60068-2-2.

B. Emergency and Transfer Trip Cabinet (ETTC) in New/ Replacement TP Facilities: An ETTC shall be located in the DC switchgear house, as shown on the Contract Drawings. The ETTC shall include logic controllers (LCs), IOMs, a DIOM, fiber optic transceivers (FOTs), and accessories as indicated on the Contract Drawings and as specified herein.

1. The LC(s) shall be interfaced with the DC switchgear via one or more pairs of IOMs, where the IOMs in the ETTC are interconnected by multimode fiber optic links to a matching IOM located in the DC switchgear. The latter shall be hardwired both to the DC feeder circuit breaker MPRs, and to a second/backup emergency trip path to the DC feeder breakers’ trip coils, as indicated in the Contract Drawings.

2. If a BLS trip request is received from the TP site BLS, the LC(s) shall trip the 34.5kV circuit breakers and all DC circuit breakers through direct trip by activating the Device 186 lockout relays and shall send non-reclosing trip signals to DC feeder circuit breakers in the local TP facility and in other TP facilities, as required to de-energize the contact rails at the affected TPSS.

3. The LC shall be interfaced with the Device 164 relay protecting the DC feeder breakers lineup. In the event of ‘DC structure alive’ detection by the Device 164 relay, the ETTS shall send trip signals to the DC feeder breakers in other TP facilities to result in de-energizing of the contact rails at the faulted TP facility.

4. LCs in adjacent TP facilities shall communicate over single-mode fiber optic links in a loop configuration using fiber optic transceivers (FOTs) connected to the serial ports of the logic controllers, as indicated on the Contract Drawings.

5. The DIOM(s) located in the ETTC, shall communicate via single-mode fiber optic cable with pair-matching IOMs in the adjacent TCRs, for interface with existing platform trip and wayside emergency trip circuits. The TCR IOMs and necessary ancillary equipment shall be housed in an emergency trip panel (ETP) located in the adjacent TCR.

6. In a new TP facility, ETTS status and alarms generated by an LC other than the device-failure-related alarms shall be transmitted via Ethernet interface to the control network switch in the C04 panel. The LC’s trouble alarm contacts shall be hardwired individually to the PLC in the C02 panel for display on its alarms screen, and for transmission to the OCC. The IOM’s or DIOM’s trouble alarm contacts and DIOM’s generated alarms shall be wired to the LC for Ethernet reporting to the C02 PLC via the C04 control network switch. Alarms shall be displayed at C02 alarm screen and be sent to the OCC.



7. The ETTC shall be wall mounted, single or double door, NEMA 4, constructed of at least 16-gauge steel, and shall be designed by the Contractor to house equipment indicated on the Contract Drawings at the specific site, with provisions for easy and convenient access for equipment maintenance. The ETTC enclosure shall be designed to meet the requirements of Article 1.08.D, entitled Equipment Construction, of Contract Specifications Section 34 21 01, General Requirements for the Traction Power System.

a. The ETTC shall be equipped with:

1) Wireways and terminal blocks for the I/O hard-wired interfaces, including a terminal block for grounding.

2) Low-voltage circuit breaker for the 24 VDC power supply to the equipment.

3) Internal grounding stud, for bonding the grounding terminals of the equipment to the frame of the enclosure.

4) External grounding stud, paint-free, at the bottom of the enclosure, for grounding the enclosure to the facility’s ground system.

b. The ETTC shall be designed, including its installation and device mounting inside, to meet the requirements for essential equipment of Article 1.08.D.4, entitled Seismic Design Requirements, of Contract Specifications Section 34 21 01, General Requirements for the Traction Power System.

C. ETTC in Existing TP Facilities: At existing traction power facilities included in the ETTS loops, provide an ETTC of similar design and features for the new facilities, to house the equipment indicated on the Contract Drawings. The location of the ETTC shown on the Contract Drawings is approximate, and it may have to be adjusted following field investigation and assessment. Interface with existing dc switchgear shall be via pairs of IOMs in similar fashion as those in the new/replacement TP facilities.

1. Control power for the ETTC shall be obtained from the existing low-voltage DC distribution panel, supplied by the TPSS battery typically at 48 VDC.

2. The LC and IOM trouble/alarm contacts shall be wired in parallel to the existing SCADA alarm circuit for remote indication to the OCC. Provide a programmed discrete output from the LC to indicate loop communication channel failure. This output shall be wired in parallel with the device trouble alarm contacts for remote indication to the OCC.

3. Provide interposing relays for interface of the IOM(s) in the DC switchgear with the circuit breakers’ trip coils for the emergency tripping functions.

4. Ancillary equipment such as raceways, terminal blocks, control wires for the circuit breakers’ circuit modifications, inter-IOM fiber optic cable shall be provided as necessary for a complete functional interface.



D. Emergency Trip Panel (ETP) in train control rooms (TCRs): Provide ETPs in TCRs adjacent to TP facilities included in the ETTS loops, as indicated on the Contract Drawings. ETPs shall be wall mounted, single door, NEMA 4, constructed of at least 16-gauge steel, meeting the requirements of Article 1.08.D, entitled Equipment Construction, of Contract Specifications Section 34 21 01, General Requirements for the Traction Power System. The ETP shall be designed to house the following equipment and include the following features:

1. One IOM or more IOMs, as indicated on the Contract Drawings.

2. FOTs for the IOMs, as indicated on the Contract Drawings.

3. Low-voltage circuit breaker for the 125 VDC power supply to the IOM(s).

4. Terminal blocks and wire ways for the hard-wired circuits to the IOM(s).

5. Mini fiber patch panel for the fiber optic links of the IOM(s) to the BART FEC in the TCR, and fiber jumpers with ST connectors.

6. Equipment mounting hardware and accessories, as required.

7. The ETP enclosure shall feature internal grounding stud, for grounding the enclosure to a chassis ground available in Cabinet 23 of the TCR.

8. The ETP enclosure shall be designed to meet the requirements for seismic design (as essential equipment), equipment painting and static signs of Article 1.08.D, Equipment Construction, of Contract Specifications Section 34 21 01, General Requirements for the Traction Power System.

E. Blue Light Stations (BLS)

1. A BLS shall be provide near the main man-gate for a replacement outdoor TPSS or GBS, or at the main maintenance access doors of a new or replacement indoor TPSS or GBS. The BLS shall allow emergency response personnel and authorized personnel to de-energize the TPSS 34.5 kV and 1000 VDC systems and communicate with the BART Operations Control Center (OCC). BLSs shall be provided as specified herein and as indicated on the Contract Drawings.

2. A BLS shall include signage showing BLS location and direction to the nearest exit.

3. Equipment Components: BLS shall consist of the following components, contained within a weatherproof enclosure:

a. Enclosure: Construct enclosures from at least 1/8-inch-thick aluminum with an anodized finish. The two-compartment enclosure shall be NEMA type 3R rated. Left side door (for accessing ET and contact rail switch) shall include spring-loaded closure hinges and pull handle with magnetic latch.

b. Emergency Telephone (ET) Set: Provide ET set as described in Contract Specifications Section 27 30 01, Telephone Systems, Article 2.02, entitled Emergency Telephone (ET) System.



c. Emergency Trip Station (ETS): Provide an ETS in the BLS to trip the 1000 VDC traction power feeder breakers and 34.5 kV AC circuit breakers of the related TPSS. When activated the ETS via the ETTS shall de-energize the contact rails in the vicinity of the TP facility by tripping open the remote DC feeder circuit breakers connected to the same contact rail sections. The contact switch shall be a red mushroom head pushbutton type switch, with spring return.

1) Equipment Components: The ETS housed in the BLS enclosure shall consist of a pushbutton with one normally-open contact, spring return type.

2) Activation and Remote Indication: Depressing the pushbutton of the ETS shall close its contact, which in turn shall result in tripping of the appropriate 34.5 kV AC and 1000 VDC circuit breakers.

3) Connections: The BLS ETSs shall be hardwired to the DIOM in the facility’s ETTC, as indicated on the Contract Drawings. The DIOM shall connect to the ETTC logic controller, which shall initiate circuit breaker tripping and alarm annunciation.

4) ETS circuit supervision: The ETS circuit between the BLS and the TPSS shall include a supervision module/DIOM in the ETTC. The DIOM shall monitor the integrity of the hard-wired circuit to the BLS by circulating milliamp current in it, with the circuit featuring an end-of-line resistor connected in parallel to the trip contact of the ETS pushbutton. In addition to ETS-generated trip signal conveyed to a LC in the ETTC, the DIOM shall indicate an open circuit wiring problem and generate corresponding alarm, that shall be sent to the C02 panel and OCC.

d. DC structure alive and structure grounded indications: Provide dc switchgear structure alive and structure grounded indications via warning lights at the BLS, as indicated on the Contract Drawings.

e. Power: 120 VAC for light and receptacles, and 125 VDC for dc switchgear structure alive and grounded warning lights.

f. Emergency Trip Station Blue Light: Provide blue light fixtures that are Underwriters Laboratory listed for wet locations, and that include the following features, appurtenances, and accessories:

1) Provide housing and outlet box of glass reinforced polyester material conforming to UL 94V-0. Polyester housing and box shall be minimum 30 percent glass material, non-fading, permanent gray color, ultraviolet resistant. Nonmetallic fixture shall conform with UL 595.

2) Provide blue enclosing glove of heat-resistant glass with integral male threads for mounting into housing.

3) Provide one fixture with two lamps, each with individual ballast, or provide two one-lamp fixtures. Each lamp shall be 20 W to 25 W, 120 VAC.

4) Boxes shall be four-way tapped for 3/4-inch conduit. Plugs shall be of the same polyester material. Provide box with mounting ears.



F. ETTS Logic Controller (LC)

1. The logic controller for the ETTS shall be a discrete programmable automatic controller, SEL-2440 manufactured by Schweitzer Engineering Laboratories, or equal.

2. Logic controller shall be surface mounted inside the ETTC.

3. The standard I/O quantity option (32 inputs and 16 outputs) shall be used as the default choice. Options and accessories to the LC shall be such as to meet the requirements indicated on the Contact Drawings.

G. Input Output Module (IOM)

1. IOMs for the ETTS shall be SEL- 2505 Remote I/O Modules manufactured by Schweitzer Engineering Laboratories or equal.

2. IOMs shall be surface mounted inside ETTCs and ETPs, and at other locations as indicated on the Contract Drawings.

3. The IOMs used in pairs inside a TP facility shall be furnished with fiber-optic ready internal board for multimode FO communication. The board shall be with built-in transceivers such that there is no need for fiber attenuators for the serial communication between the IOMs of the pair, considering the short distances involved.

4. The IOMs in the TCRs, and those in ETTCs used to communicate with the ETP in a TCR, shall have an RS232 serial port to which an external fiber-optic transceiver shall be fitted that does not require fiber attenuator for single mode FO communication with the matching device at the other end.

5. The IOM power supply shall be selected depending on the IOM’s location and available nearby power sources. If the Contract Drawings show a preferred power supply, it shall be used.

H. Fiber Optic Transceivers (FOT)

1. FOTs for inter-facility communications shall be a single mode transceiver, SEL-2829 manufactured by Schweitzer Engineering Laboratories or equal. The FOT shall be coordinated with the distance involved and pertinent ETTS transmission characteristics so that there is adequate reach and in the cases of shorter distances avoidance of optical signal reflections (so that there is no need for fiber attenuators). FOTs shall be compatible with other ETTS system components supporting fast data transfer using Mirrored Bits Protocol or equal.

I. IOM with Circuit Supervision Module Capability (referred to as diagnostic IOM, or DIOM). The DIOM shall be a programmable logic controller equipped with analog inputs and discrete I/Os.



1. The DIOM shall be located in the ETTC of TP Facility. The type of DIOM used in the ETTC shall be selected by the Contractor and shall be coordinated in advance with the District. The DIOM shall:

a. Monitor the integrity of the hard-wired trip circuit between the ETTC and substation site BLS using circulating current through one of its analog inputs and recognize both a trip signal from the ETS and an open circuit wiring problem. A BLS trip shall transmit the corresponding trip command to the LC for further action. If a trip circuit wiring problem is detected then an alarm shall be generated, which shall be hard-wired individually to the LC for Ethernet reporting to C02 PLC via C04 control network switch, for display on the C02 alarm screen and re-transmission to the OCC.

b. Communicate via its RS232 serial port and FOT with an IOM in the ETP in the adjacent TCR that receives emergency trip signals from the ETP and re-transmits them to the LC through a hard-wired interface.

c. Monitor the integrity of the communication with the ETP in the adjacent TCR. If a problem with communications link is detected, an alarm shall be generated and hardwired to the C02 PLC. The alarm shall be displayed on the alarm screen, and sent to the OCC.

2. The DIOM shall be the SEL-2411 Programmable Automation Controller manufactured by Schweitzer Engineering Laboratories or equal. DIOMs shall be compatible with other ETTS system components supporting fast data transfer using Mirrored Bits Protocol or equal. The specific configuration from the available options shall be selected by the Contractor to meet the I/O requirements at the specific location, as indicated on the Contract Drawings.

J. DC-to-DC Voltage Converter: The step-down voltage converter used in conjunction with the DIOM as power source for its analog inputs shall be a DC-to-DC converter for low-voltage devices, SEL-9321 manufactured by Schweitzer Engineering Laboratories or equal.

K. Fiber Optic Connectors

1. Provide LC connectors in all applications, unless such connectors are not acceptable by the device or its FO port.

2. If LC connectors are precluded, then provide ST connectors.

L. Hard Wiring in TPFs and TCRs

1. Provide stranded copper wires of size as indicated on the Contract Drawings, with #16 AWG serving as the minimum default size.

2. Wire Insulation: rated 600-volt, flame retardant and non-propagating, passing the IEEE 383 and UL vertical tray flame test.

3. Wire Terminations: ring-type crimp lugs.



M. Provide the following equipment for installation in old existing traction power facilities included in the ETTS, using 48 VDC control power:

1. Emergency Trip Relay

a. Emergency Trip Relay: heavy duty DC power relay, Tyco PRD, or equal.

1) DPDT, auxiliary contacts with magnetic blowout

2) Contact Rating: minimum 20 A continuous at 125 VDC

3) Coil Rating: nominal 48 VDC

4) Pick Up Voltage: 75 percent or less of nominal

5) Operate Time: 30 milliseconds ± 5 milliseconds

6) Expected Life (Electrical): 100,000 operations at rated load.

7) Provide dust cover with each relay.

2. Disconnect Means

a. Disconnect terminal block: 300V, 30 A, 24-10 AWG, Euro T4 series or equal.

1) DIN rail and mounting hardware: per manufacturer.

2) Disconnect type: copper bar and 1A fuse.

3. 48 VDC Control Power Circuit Breaker

a. Contractor shall field verify requirements and procure circuit breaker suitable for the existing DC power supply panel, with following minimum characteristics:

1) Configuration: 1 phase, 2 pole, bolt-on connection.

2) DC Rating: 240 V, 15 A or 20 A.

3) Protection: thermal magnetic, instantaneous, and long-time.

4. Enclosures: designed to meet the requirements for seismic design (as essential equipment), equipment painting and static signs of Article 1.08.D, entitled Equipment Construction, of Contract Specifications Section 34 21 01, General Requirements for the Traction Power System. Furnish enclosures with the following characteristics:

a. 16-gauge steel, minimum; or made of fiberglass, if so indicated on the Contract Drawings.

b. Flush cover and offset body.

c. Removable doors with butt hinges, recessed T-handle latch flush with door.

d. Mounting holes on rear of enclosure; 4 mounting studs.

5. Mounting panels: Glastic, NEMA GPO-2, UTS 1478, thickness 3/8 inches, red color.



N. Additional equipment in ETTCs in new TP facilities, for connecting each LC via its USB port to the Maintenance Network Switch in the C04 cabinet used for enabling remote access to the LC from the Maintenance Network Switch:

1. USB Device Server: Digi - AnywhereUSB/2 or equal. USB device server shall include:

a. Two USB ports

b. One 10/100Base-T Ethernet port

2. Media Converter (copper-to-fiber): unmanaged fast ethernet media converter.

a. Incoming port shall be 10/100Base-TX (RJ-45 connector).

b. Outgoing port shall be 100Base-FX; 1300 nm Multimode (ST connector). Supported link distance shall be 2 km per 1.2 miles minimum. Link budget shall be 11.0 dB minimum.

c. Fault alarm reporting: dry contact relay alarm output.

d. Operating temperature: -40 to +75 degrees Celsius.

e. Power input shall support redundant input power connections.

f. External AC/DC Power Supply:

1) Input voltage: 85 to 264 VAC, 120 to 370 VDC.

2) Output voltage: 10.8 to 13.2 VDC, 2A.

3) Power: 24 Watts

g. Media converter shall be SISTF Series, by Transition Networks or equal.

2.03 SPARE PARTS

A. Furnish the following spare parts, rounded up if quantities are fractional:

1. One (1) logic controller per five (5) ETTCs.

2. One (1) IOM per ten (10) IOMs.

3. One (1) DIOM per five (5) ETTCs in new TP facilities.

4. Two (2) FO transducers per five (5) ETTCs.

5. One (1) BLS assembly per two (2) new TP substations.

6. Two (2) 48 VDC emergency trip relays per old TPSS included in the ETTS.

7. One (1) DC-to-DC voltage converter for each spare DIOM.

8. One (1) USB device server and one (1) media converter per five (5) ETTCs in new TP facilities.



2.04 EMERGENCY AND TRANSFER TRIP CONTROLLER SOFTWARE

A. General: Configure the software/firmware of the logic controllers and diagnostic IOMs to meet the functional requirements of the ETTS system as specified herein, and as indicated on the Contract Drawings. Information about existing ETTS system software, if needed by the Contractor to develop and implement software interfaces in the system programming will be provided by the District. Interfaces between new and existing ETTS software, if such are present, shall be developed, tested, and implemented by the Contractor.

B. ETTS Logic Controller (LC): The Contractor shall program the ETTS logic controllers in each new and existing TP facility as follows:

1. LC in a TP facility shall be programmed and configured for communication via its two serial ports with logic controllers in all other traction power facilities included in the same ETTS communication loop. The communication medium shall be pairs of single mode optic fibers, and the reach and configuration of each ETTS loop shall be as indicated on the Contract Drawings.

2. The Contractor shall program the LCs using fast data transfer Mirrored Bits Protocol or equal to send and receive platform, emergency, and transfer trip requests and commands from a given TP facility to all other TP facilities in the same communication loop.

3. An ETTS communication loop shall remain fully functional if one fiber path is lost between two adjacent LCs.

4. The LC software shall accept, process, and convey:

a. Emergency trip, non-reclosing type requests received from IOMs connecting to platform trip and wayside emergency trip circuits in TCRs, from Device 164 relays protecting the DC feeder circuit breakers in the replacement TP facilities, and from the TP site BLS. Where possible, use odd numbered mirrored bits and I/O terminals of LCs and IOMs to accommodate the non-reclosing trip commands.

b. Transfer trip requests permitting breaker auto-reclosing received from IOMs connected to DC feeder circuit breakers’ protective relaying and instantaneous release (Dev. 176) devices. Where possible, use even numbered mirrored bits and I/O terminals of LCs and IOMs to accommodate auto-reclosing-enabled transfer trip commands.

5. The ETTS control logic shall be configured to meet the circuit breaker trip requirements and MPR and direct circuit breaker control scheme interfaces as indicated herein and on the Contract Drawings.

6. In the event of an emergency trip initiated by a PTS, the ETTS shall not allow energizing of the affected contact rail section at the platform until the activated PTS has been manually reset.

7. In the event of a transfer trip, the LC receiving the initial TT request shall also back-trip the originating circuit breaker, to ensure proper TT scheme operation in



case the transfer trip signal has been generated by the circuit breaker’s TT test switch.

8. Contact rail (CR) sectionalizing gaps at new or replacement TP facilities are equipped with normally open (NO) gap-bypass disconnect switches. As the closing of such a switch will connect two adjacent CR power sections, the ETTS shall monitor the status of these switches, and the LCs logic shall maintain correct operation of the emergency tripping and transfer tripping functions in the resulting new longer CR power section, if the bypass switch has been closed.

9. All standard logic controller hardware and application program error diagnostics shall be summarized and reported (via alarm contact of the LC) to the C02 Panel and the ICS (EBP included) as “LC TROUBLE”.

10. Logic controllers shall be programmed to monitor whether the fiber optic links to the adjacent LCs in the ETTS loop are operational by polling the associated hardware at the other end of the link. If the logic controller does not receive a confirming test input signal within two seconds, a “LC Channel ‘X’ Communication Trouble” alarm shall be generated, and in the case of a new TP facility transmitted over the Ethernet connection to the control network switch in the C04 panel, for re-routing to the C02 panel and the ICS. If the LC is located in an existing TP facility, this alarm shall be programmed to activate a discrete output contact, which shall be paralleled with the LC’s standard alarm contact and the resulting circuit connected to an existing SCADA alarm circuit for remote indication of ETTS equipment trouble at the OCC.

11. Logic controllers shall have software programming capability for communication of ETTS operational alarms over Ethernet connection to the control network switch located in the TP facility’s C04 cabinet, as indicated on the Contract Drawings.

C. Diagnostic I/O Module (DIOM): The Contractor shall configure and program the DIOM in each TP facility as follows:

1. In a new TP facility, the DIOM shall be programmed and configured for supervision of an analog trip circuit to the TP site BLS, including detection of trip signals from the ETS in the BLS, and circuit continuity problems. An in-series and end-of-line resistors shall be used for circuit calibration, as indicated on the Contract Drawings. The Contractor shall be responsible for determination of the values of the resistors and all circuit parameter settings.

2. The DIOM shall be programmed for communication via its serial port, FOT and single mode fiber cable with an IOM in the adjacent TCR, where the IOM provides hard-wired interfaces with existing platform trip and wayside emergency trip circuits. The communication with the TCR IOM shall be via fast data transfer Mirrored Bits Protocol or equal (the same software protocol used for communication between LCs connected in an ETTS loop). Received trip signals from the TCR IOM shall be transmitted via hard-wire interface to the LC(s) in the ETTC, as indicated on the Contract Drawings.



3. The DIOM shall be programmed to monitor via constant polling whether the fiber-optic communication link to the IOM in the TCR is operational and healthy. If a down time or off period in the communication channel exceeding two seconds is detected, the DIOM shall be programmed to raise an alarm through a discrete output contact. In the case of a new TP facility, this alarm contact shall be hard-wired to the C02 PLC, and from there sent to the OCC. In the case of an existing TP facility, this alarm contact of the DIOM shall be paralleled with its standard equipment trouble alarm contact, and the resulting circuit connected to an existing SCADA alarm circuit for a remote indication of ETTS equipment trouble at the OCC.

2.05 SPECIAL TOOLS

A. General: Furnish the following special tools for testing of the ETTS. Upon completion of the Work, the following special tools shall be delivered to District:

1. Minimum two (2) SEL-4388 Mirrored Bits Testers or equal.

2. LV test switches for simulating voltage-based input signals to the discrete inputs of LCs and IOMs in numbers required for the ETTS testing.

PART 3 – EXECUTION

3.01 GENERAL

A. The Contractor shall provide all equipment and materials and shall configure all application software to form a complete functioning system for all ETTS, as indicated on the Contract Drawings.

B. Installation and testing of the fiber optic and communications cables, communications grounding and the associated equipment described within this section shall be performed in compliance with implementation and test requirements of the TIA-455-C, TIA 455-13, TIA-526-7-A, TIA-526-14-C, TIA-568.0-D, TIA-568.1-D, TIA-568.2-C, TIA-568.3-D, TIA-569-D, TIA-606-B and TIA-607-C standards. Refer to Section 27 13 01, Communication Cables and Related Equipment for additional requirements for the communications cabling and equipment.

3.02 INSTALLATION

A. General

1. The Contractor shall:

a. Be responsible for executing integration of all new ETTS equipment with the existing emergency trip systems, with access points in the TCRs. Existing transfer trip systems shall be completely replaced by the new ETTS. To that end, in existing TPFs included in the ETTS loops the Contractor shall remove



the existing TT system’s interfaces with the DC switchgear and shall salvage the TT circuit boards.

b. Field verify that the record drawings used for developing the modifications to DC circuit breakers’ controls in the existing TPFs, and interfaces with the existing ET systems in the TCRs, are correct.

c. Inspect and verify correctness of the terminations and connections of ETTS fiber optic and control cables in TPSSs, GBSs, and TCRs.

d. Develop and apply appropriate cable and wire designations, labeling and terminations complying with BART conventions.

e. Coordinate with Engineer to obtain necessary work orders for specific sites and safe clearances.

2. Existing traction power and train control facilities where new ETTS equipment is to be installed will be BART system’s in-service facilities. Utmost care shall be taken to avoid interference with BART operations other than what has been precisely agreed to in advance in a Site Specific Work Plan (SSWP).

a. Work involving wire terminations at, or wire removals from, existing equipment shall be performed only during non-revenue hours, as specified in Contracts Specification Section 01 11 00, Summary of Work.

b. Work in compartments or raceways containing 1000 VDC buses or parts at high potential shall be done with the respective facility de-energized, that are either during the system non-revenue hours; or, during the off-peak hours. The off-peak hours are from 10:00 a.m. to 2:30 p.m. on weekdays, or on weekends.

3. The Contractor shall remove disconnected wiring and equipment to be demolished or salvaged, and shall install new equipment and wiring, as indicated on the Contract Drawings, and as necessary for a fully functional ETTS. Disconnecting existing wiring from, terminating new wiring to in-service equipment in existing facilities, and connecting fiber optic cable to existing FPPs and FECs of the BART system, will be done by BART personnel with support by the Contractor.

4. The Contractor shall follow requirements of Contract Specifications Section 34 21 70, Traction Power Facilities Installation Requirements, in all work at new or replacement facilities, or at existing adjacent BART facilities included in the ETTS network.

5. Raceways in Existing Facilities

a. Use of Existing Raceways: Existing cable trays may be used for the new circuits where suitable, as indicated on the Contract Drawings; or per Contractor’s request, subject to approval by the Engineer. Flexible conduit shall be installed on the existing cable trays for the new wiring.

b. New Raceways: Conduit of the type indicated on the Contract Drawings, attached to walls, ceiling, or existing raceway infrastructure, shall be used for



new raceways between different equipment and cabinets. The raceways shall be complete with the required supports and accessories.

c. New Conduit Inside Switchgear Cubicles: Install flexible conduit inside DC switchgear and relaying enclosures, from the point of entry of the new wiring to the vicinity of the new ETTS equipment.

d. Installation Design for ETTS Enclosures and Raceways: The Contractor shall be responsible for the installation design of all ETTS enclosures and new raceways, including final raceway routing selection, supports, bracing, and anchoring. For reference, see Article 1.08.D entitled Equipment Construction of Contract Specification Section 34 21 01, General Requirements for the Traction Power System. The design shall meet the seismic requirements of the Contract for essential equipment.

B. Installation in New/ Replaced Traction Power Facilities

1. Install ETTS system components including ETTCs, IOMs, DIOMs, BLSs, conduit and other raceways, control wiring, wiring devices like terminal blocks, fiber optic connections, and all other ETTS ancillary equipment as required herein and as indicated on the Contract Drawings, as part of the TP facility’s installation.

2. Use terminal blocks to interface LCs and IOMs with wire runs.

C. Installation in Existing Traction Power Facilities included in the New ETTS

1. Demolition and Salvaging: Remove existing wiring marked for demolition on the Contract Drawings. Existing transfer trip circuit boards in TPFs where the new ETTS is installed shall be salvaged after the removal of their wiring interfaces. Deliver the old transfer trip boards to BART storage as directed by the Engineer.

2. New Equipment Installation: Install new ETTS equipment including ETTCs, LCs, IOMs, aux relays for the emergency tripping, control wiring including wiring devices like terminal blocks, fiber optic cables, jumpers and connectors, conduits and accessories, 48 VDC circuit breakers and supply circuits, enclosures, and all required ancillary equipment to achieve a complete and functional new ETTS system, as specified herein and as indicated in the Contract Drawings. Install wiring internal to the ETTS enclosures, and external to the points of connection with the existing equipment. Installation requirement for existing facilities shall conform to those for new facilities.

3. Wiring Access to DC Switchgear Cubicles: Where possible and practical, for control wires use existing cable trays and wireways on top of the switchgear for wiring access to the target cubicles and compartments. Fiber-optic cables to the DC switchgear shall be installed separately, in a rigid conduit up to switchgear enclosures.

4. Height of Installation of ETTS Cabinets and Enclosures: Unless otherwise approved by the District, the top of the ETTS cabinet or enclosure shall be located 66 inches off the finished floor.



5. IOM and New Emergency Trip (Dev. 195) Relays Installation in the DC Switchgear: The Contractor shall determine locations of the IOM, Dev. 195 relays and related accessories inside the DC switchgear cubicles, and related installation details, based on field investigation of the subject TPF as needed to determine relevant design details and development of the installation design.

6. Auxiliary IOM Enclosure: If there is no space for the new ETTS equipment to be located in the DC switchgear existing relay compartments of the circuit breakers, the new ETTS devices shall be installed in a new auxiliary IOM enclosure located at the end of the DC switchgear lineup. The Contractor shall design the auxiliary enclosure and the means of access to the existing relaying and control wiring of the switchgear, based on field investigation of the particular TPF.

7. Wiring and Fiber Optic Terminations at Existing Circuits and Devices: Wiring and fiber optic cable terminations at existing circuits and devices, and modifications to existing circuits, will be performed by District personnel and shall be supported by the Contractor. The installation of the new wiring, and the clearing of old disconnected wiring, shall be the responsibility of the Contractor.

8. Work Hours Restrictions: The following time-of-day restrictions apply to the work in existing TP facilities, depending on the nature of the work:

a. Installation of IOMs, auxiliary relays, and related accessories in the DC switchgear relaying cubicles, not involving wiring connections to existing circuits or modifications to existing circuits, shall be performed either during the non-revenue hours; or during off-peak revenue hours (which are between 10:00 a.m. and 2:30 p.m. on weekdays, and all day on weekends), if the TP facility is taken off-line (i.e. its DC circuit breakers are tripped open).

b. Work that requires access to a cubicle with equipment at the 1000 VDC potential that is not protected by a physical barrier shall be performed with the subject equipment de-energized.

c. Wiring modifications to existing DC circuit breakers’ controls shall be performed only during non-revenue hours by BART personnel, with the Contractor in attendance in a support role. For definition of non-revenue hours, refer to Contract Specifications Section 01 11 00, Summary of Work.

D. Installation in Train Control Rooms

1. New Equipment Installation: Install the new ETTS equipment including ETP enclosures, IOMs, FOTs, fiber optic cables within the TCR to interface the ETP with the BART FEC Install mini fiber patch panels, fiber optic jumpers and connectors, conduits and attachment accessories, control wiring, 125 VDC circuit breakers, and all required appurtenances to achieve a complete and functional interface between the existing platform trip and wayside emergency trip systems and the new ETTS, as specified herein and as indicated in the Contract Drawings.

2. New Raceways and Wiring: Provide all new raceways and wiring, necessary for interfacing the ETP with existing cabinets. Existing cable trays in the TCR may be used, where suitable, with flexible conduit installed on them for the new wiring circuits. Otherwise, use GRS conduit as a standalone raceway.



3. Existing Cabinets without Access for New Wiring: If an existing cabinet with which the ETP must be interfaced does not have access provisions for the ETTS wiring, the District will provide the means of entry (drilled new hole and conduit fitting).

4. Wiring Connections: Provide all wiring connections inside the ETP and install the new wiring from the ETP to the existing cabinets where the ETTS wiring interfaces are to be made. Coil 10-foot length of the new wires/cable on top of these cabinets. Connections of new wiring to existing circuits, or modifications to existing circuits, shall be made only by BART electricians during non-revenue hours, with the Contractor in attendance in supporting role.

5. Fiber-Optic Links between ETP and BART FEC: Provide mini FPP in the ETP, and two (2) single mode fiber optic jumpers with ST connectors for the IOM interface. Terminations at the ETP shall be by the Contractor. Terminations at the BART’s TCR FEC shall be done by District personnel, per design by the Contractor and with materials and incidentals furnished by the Contractor. Provide the new fiber cables between ETP and FEC with circuit ID labels at both ends.

E. Hard Wiring in TPFs and TCRs: Use stranded copper wires of size as indicated on the Contract Drawings, with #16 AWG serving as the minimum default size.

1. Control Cable: Individual conductors run between different equipment cabinets and enclosures, if of the same wire size and routing, shall be cabled together in accordance with ICEA S-73-532 in a control cable with binder tape and flame-retardant jacket. Individual conductors shall be color-coded with base colors, and trace colors if needed, in accordance with ICEA S-73-532.

2. Tagging: Provide wire and conduit identification tags and labels conforming to Contract Specifications Section 26 05 24, Low Voltage Wires and Cables.

3. Grounding: For LC, IOM and enclosure connections to ground use insulated, green-colored #10 AWG conductor; refer to Section 26 05 26 Grounding and Bonding for Electrical Systems.

F. Inter-Facility Fiber Optic Cables

1. Inter-facility fiber optic cables (TPF to TCR, and TCR to TCR) are furnished and installed by District. They are single mode type. The Contractor shall design the interfaces at the new TP facilities, terminate the cables and assign the fiber strands for use by the ETTS.

2. To construct the ETTS communication loops, in the line segments between different facilities (TPFs and TCRs) the Contractor shall utilize spare fibers of the existing fiber-optic cables.

3. Fiber-optic cable terminations at existing BART FECs in the TCRs shall be made by District personnel per design by the Contractor, with materials (e.g. jumpers, connectors, support trays) furnished by the Contractor.



G. Sequencing of ETTS Installation in TCRs and Existing TPFs

1. Contractor shall complete the installation work, except for terminating circuits at interfaces with in-service equipment, in the TCRs and existing TPFs associated with a given ETTS communication loop before the finish of the installation of the first new or replaced TPF of the loop. This is necessary to ensure timely field testing and commissioning of the ETTS on a loop-by-loop basis, with no delays, either in an initial partial loop configuration or in a final loop configuration, depending on the case.

2. The order of multiple TPF replacements is provided in Contract Specifications Section 01 11 00, Summary of Work. Information about which TPF belongs to which ETTS communication loop, which is needed in order to plan the schedule of work in the TCRs and existing TPFs, is indicated in the Contract Drawings.

3.03 FACTORY ACCEPTANCE TESTS

A. Factory acceptance testing (FAT) per this Section shall cover the testing of each ETTS loop’s logic controllers and DIOMs programmed and interconnected as they will be in the BART operating system. The test configuration shall include the LCs’ connection to the facilities’ C02 PLCs, using either the actual PLCs or emulating the latter by laptop computers, to confirm the proper operation of the Ethernet alarms, and the ‘equipment trouble’ alarms hardwired direct to the PLC.

1. Adjacent ETTS loops sharing control of a TP facility that has contact rail sectionalizing gaps with gap-bypass switches shall be part of the same physical test setup, which shall include the hard wiring between the LCs of the two loops in the common TPF. These tests shall be used to verify the proper functioning of all logic controllers in the test setup and confirm that their operation is in accordance with the required circuit breaker tripping logic under all simulated field conditions.

2. An exception to the above requirement concerning a TPF with contact rail gap bypass switches is allowed if one of the ETTS loops is part of another contract, or part of the existing BART system. In such case, the hard-wired interface between the two LCs in the substation with gap-bypass switches shall be simulated (based on the ETTS design).

B. Tests of system connectivity, performance, and response time shall be carried out on the factory floor with all ETTS logic controllers and DIOMs of a given test setup, as described herein, configured to match the actual field installation.

1. The Contractor shall develop a detailed test procedure for the FAT, including ETTS I/O schedule and testing sequence covering all possible ET and TT sources and ETTS configurations associated with a given ETTS loop. The results from the FAT shall be recorded on prepared in advance and approved test data sheets, that clearly define the system configuration, source and type of trip, how exactly the trip signal is applied or simulated, and the expected outcomes from each test. The test data sheets shall include the specific pass/fail criteria for each test.



2. Substitute short cable links for long fiber optic cables used in the field. Either the actual C02 PLCs or substitute laptop computers shall be used to verify the proper functioning of the Ethernet alarms of the LCs.

3. IOMs for interfaces with the DC switchgear and cabinet 64TC do not have to be part of this test. Instead, the status of hard-wired inputs and outputs of these IOMs in the ETTC may be monitored or simulated at the corresponding inputs and outputs of the respective LC. Test switches shall be used to apply voltage to the LC’s inputs, to simulate inputs from remote equipment.

4. The IOMs in the TCRs, shall be included in the FAT, with their fiber-optic connection to the corresponding DIOM or IOM in the ETTC represented by a short fiber optic link in the test setup.

5. Include the analog circuits of the DIOMs to the TP site BLSs as part of the FAT setup. Model the respective trip circuit to the BLS with its two resistors and circulating current. The proper operation of the supervised BLS circuit shall be confirmed by the FAT in both ‘emergency trip’ and ‘circuit trouble’ alarm mode.

6. The status of discrete inputs and outputs of the LCs shall be verified by observing their status LEDs, or by external indicators, as appropriate.

C. The FAT shall verify the circuit breakers tripping logic for emergency tripping and transfer tripping in accordance with the circuit breaker tripping logic tables indicated in the Contact Drawings. The tests shall include confirmation of the following requirements:

1. In the event of a trip signal originating from a PTS, attempts at closing the circuit breakers supplying the same de-energized contact rail section shall be blocked until the PTS pushbutton has been reset.

2. In the event of a transfer trip, the circuit breaker originating the transfer trip shall be back-tripped by the ETTS, to ensure proper TT operation if the breaker’s TT test switch is used.

3. If there is a contact rail gap-bypass switch, either at a TPF inside an ETTS loop or at a TPF bordering two loops, the test shall include scenarios with the switch both open and closed, the latter case resulting in a configuration where two adjacent contact rail sections are bridged electrically. Transfer tripping and emergency tripping shall operate correctly for either position of the switch.

4. In the preceding scenario (per Article 3.03.C.3 of this Section) if one of the ETTS loops is absent due to conditions described in Article 3.03.A.2 of this Section, the proper operation of the tested loop under condition of closed gap-bypass switches shall be confirmed by simulation of the hard-wired interfaces between the logic controllers of the different loops in the TPSS with contact rail gap-bypass switches.



a. ET and TT inputs from the absent LC shall be modeled by applying activating voltage at the required inputs of the present LC. With closed position of the gap bypass switch, the correct operation of the LCs of the tested loop shall be confirmed.

b. With gap bypass switch closed for the present interface LC, the different ET and TT actions of the tested loop shall activate the correct outputs of the present interface LC (per ETTS design), which in the field condition will be wired as inputs to the absent interface LC.

5. ET and TT functions shall operate correctly with any one of the fiber-optic links between two adjacent nodes of the ETTS loop disconnected. The LCs at both ends of the disconnected fiber optic cable shall generate the appropriate ‘Communication Channel Failure’ alarm.

6. The FAT shall be used to confirm that upon removal of any emergency trip or transfer trip input signal to a LC, the ETTS communication loop status automatically resets to normal.

D. The FAT shall include verification of the proper functioning of all ETTS generated alarms, to be sent by the LCs over Ethernet links to the C02 PLC via the C04 control network switch in the case of a new TP facility, as shown on the Contract Drawings and required by the Contract Specifications. For LCs and DIOMs to be installed in existing TP facilities, the test shall confirm the proper operation of the programmed output contacts for the communication channel failure alarms.

E. For one LC, the FAT shall confirm the proper operation of the remote access to the LC via its USB port, using the communication conversion devices per this specification and as indicated on the Contract Drawings.

F. Following successful completion of the FAT, the Contractor shall use the same LCs, by model number and as already programmed, for installation in the same locations in the ETTS configuration in the field.

G. For replacement TP facilities with prefabricated switchgear houses, after successful completion of the FAT per this Section, the Contractor shall perform the ETTS-related factory tests per Contract Specification Section 34 21 75, Traction Power Facility Functional Factory Testing.

3.04 FIELD TESTING

A. General: Field testing of the ETTS shall be performed in stages as specified herein, with approved test procedures and test data forms, in accordance with Contract Specifications Section 01 45 24, Testing Program Requirements.



B. Stage 1 Field Testing for New or Replaced TPFs. These tests shall be performed upon completion of the TPF installation including ETTS wiring inside the TPF. The DC feeders will not yet be connected to the contact rails, but the 125 VDC, 24 VDC and LV AC systems shall be fully functional. The tests shall involve testing the ETTS equipment and wiring inside the TPF, the TP site BLS, and the ETTS equipment in the associated train control room (TCR). In the TCR, the ETTS devices shall be installed, with fiber-optic link to the TPF functional, wiring inside the ETP complete, and hard wiring from the ETP to existing cabinets installed and tagged but without the terminations to the existing equipment.

1. Actuate, one at a time, IOM inputs in the TCR simulating actual platform trip and emergency trip signals. Verify correct response by the circuit breakers of the TP facility to each signal. Using a mirrored bits tester on the LC’s serial ports, verify that the correct (per design) mirrored bits are sent by the logic controller(s) for tripping the DC feeder breakers in other TPFs as required to de-energize the target contact rail section(s).

a. In case of interim or final configuration where the ETP IOM has outputs wired to the existing ET system, the proper operations of these outputs in response to trip signals from the TPF shall be tested.

2. Actuate the ETS of the TP site BLS and confirm that the ETTS trips all circuit breakers of the TP facility. Using a mirrored bits tester confirm that the correct mirrored bits (per ETTS design) are sent through the serial ports of the LC for tripping remote DC circuit breakers in other TPFs, as required to de-energize the contact rails at the tested facility.

a. In case of interim or final configuration where the ETP IOM has outputs wired to the existing ET system, confirm the proper operation of these outputs in response to the TP site BLS activation in the associated TPSS.

3. Actuate, one at a time, Device 164 relays in ‘structure alive’ and ‘structure grounded’ mode. Confirm via mirrored bits tester that in the case of ‘structure alive’ indication from the 164 relay protecting the DC feeder circuit breakers, the ETTS logic controller sends the correct mirrored bits to trip without reclose the remote DC feeder breakers that will result in de-energizing the contact rail sections at the tested TPF. Confirm that for all ‘structure alive’ and ‘structure grounded’ simulated faults from Device 164 relays, the corresponding warning lights at the TP site BLS function correctly.

a. In case of interim or final configuration where the ETP IOM has outputs wired to the existing ET system, confirm the proper operation of these outputs in response to the Device 164 relay activation in the associated TPSS.

4. From the DC switchgear, generate one at a time, transfer trip signals by actuating the transfer trip test switch at each DC feeder breaker. Verify correct operation of the transfer trip circuits and logic by confirming correct response of circuit breakers to each TT signal, and that the DC circuit breakers tripped reclose. Using a mirrored bits tester at the ETTS logic controller, verify that correct mirrored bits for transfer trip signals are sent to the remote DC circuit breakers in other TP facilities supplying the same contact rail section as the one to which the tested circuit breaker is connected.



5. Using mirrored bits testers connected to the serial ports of the ETTS logic controller, generate one at a time, all mirrored bit inputs representing emergency trip and transfer trip signals received by the tested logic controller from other TP facilities based on the overall ETTS design. Verify correct operation of the transfer trip and emergency trip circuits and logic by confirming correct response of the DC circuit breakers to each signal. Confirm that:

a. the correct DC circuit breaker is tripped;

b. dc circuit breakers tripped in reclose mode reclose;

c. dc circuit breakers tripped in non-reclose mode (i.e. emergency trip) stay open;

d. in the event of a sustained input trip signal to the logic controller from a platform trip station, the target DC circuit breaker cannot be closed; and

e. in case of interim or final configuration where the ETP IOM has outputs to the existing ET systems, confirm the proper operation of these outputs in response to received ET signals by the ETTC LC from other facilities.

6. Create ETTS device failure and circuit trouble conditions to verify that the fault is detected, and the correct alarm is generated. This failure mode testing shall include:

a. disconnecting the hard-wired trip circuit to the TP site BLS;

b. disconnecting, one at a time, the fiber-optic links between pairs of IOMs;

c. disconnecting the fiber-optic cable between the DIOM in the ETTC and the ETP in the TCR;

d. removing the power supply of IOMs located outside of the ETTC; and

e. removing the power supply to the ETTC.

7. For all tests in scenarios described above, verify that accurate alarm signals are received locally at the alarm screen of the C02 PLC.

C. Stage 1 Field Testing for Existing Old TPFs. These tests shall be performed upon completion of the installation of the new ETTS equipment in the TPF, except for the connections of the new wiring to the existing DC switchgear controls and indications, and the related modifications to the existing switchgear wiring. In case of a TPSS with associated ETP in a nearby TCR, the tests shall include the ETP. Wiring inside the ETP and the fiber-optic link to the TPF shall be completed, with hard wiring from the ETP to the existing cabinets installed and tagged but without the terminations to the existing equipment.

1. If the TPSS is connected to an ETP in a TCR, actuate, one at a time, all IOM inputs in the TCR simulating actual platform trip and emergency trip signals. Verify correct response at the outputs of the IOM in the DC switchgear, based on the ETTS design. Using a mirrored bits tester, verify that correct mirrored bits are sent by the ETTS logic controller via its serial ports for tripping the DC feeder breakers in other TPFs supplying the contact rail section(s) that must be de-energized.



2. From the DC switchgear, generate one at a time, transfer trip signals by actuating the required IOM Inputs. Verify by using a mirrored bits tester at the ETTS logic controller, that correct mirrored bits for transfer trip signals are sent to the remote DC circuit breakers in other TP facilities supplying the same contact rail section as the tested circuit breaker.

3. Using a mirrored bits tester connected to the serial ports of the ETTS logic controller, generate one at a time, all mirrored bit inputs representing emergency trip and transfer trip signals received by the tested logic controller from other TP facilities based on the overall ETTS design. Verify correct operation of the transfer trip and emergency trip circuits and logic by confirming the correct IOM Output in the DC switchgear is activated.

D. Stage 2 Field Testing, General Requirements. These tests shall be carried out for each ETTS communication loop, for each of its operational configurations: interim (if applicable) and final. They shall be performed after successful completion of the Stage 1 field tests for all TP facilities involved in the loop configuration. If a new TPF is common to two loops, the test setup shall include the facilities of both loops. Apart from confirmation of the ETTS breaker trip logic and correct wiring, and correct generation of ETTS alarms, these tests shall be used to confirm that upon removal of the trip-initiating signal the ETTS communication loop resets properly to its default status. Special requirements for these field tests are:

1. If an ETTS loop includes a TPF with contact rail sectionalizing gaps equipped with gap-pass switches, the stage 2 field tests shall be carried out with these switches both open and closed, to confirm the correct operation of the ETTS for both scenarios.

2. The stage 2 tests shall be repeated with one fiber-optic communication link between adjacent LCs of the same ETTS loop removed.

3. If some of the TP facilities, or parts thereof, included in the ETTS loop under test have already undergone similar field testing and SIT as part of a previous interim configuration, the operation of such already proven equipment and interfaces is not a target of the current field test, and does not have to be proved again. Such equipment shall be included in the loop for the sake of completeness and integrity of the network.

E. Stage 2 Field Testing, Specific Tests. The stage 2 field tests shall include the following:

1. Actuate, one at a time, all IOM inputs in each TCR of the test setup to simulate platform trip and emergency trip signals. Verify the response by the circuit breakers by circuit breaker ID and type of tripping in all TP facilities needed to de-energize the target contact rail section. In case of interim or final configuration where the ETP IOM has outputs wired to the existing ET system, test the proper operation of these outputs in response to trip signals from the TPF. For the platform trips, confirm that with the platform trip signal still present (PTS not yet reset) the DC feeder circuit breakers supplying the de-energized contact rail section cannot be closed.



2. At each replacement TPF in the test setup, actuate the ETS of the TP site BLS. Confirm that ETS actuation trips all circuit breakers of the associated TPF in non-reclose mode, and likewise trips all remote DC circuit breakers in other TPFs, as required to de-energize the contact rails at the tested facility.

3. At each replacement TPF in the test setup, actuate, one at a time, all Device 164 relays in ‘structure alive’ and ‘structure grounded’ mode. Confirm that in the case of ‘structure alive’ signal from the 164 relay protecting the DC feeder circuit breakers, the remote DC feeder breakers in other TPFs required to de-energize the contact rail sections at the tested TPF are tripped in non-reclose mode. Confirm that for all ‘structure alive’ and ‘structure grounded’ simulated faults from all Device 164 relays, the corresponding warning lights at the TP site BLS function correctly.

4. Generate, one at a time, transfer trip signals from each DC feeder circuit breaker included in the tested loop. In replacement TPFs, do this by using the TT test switches of the circuit breakers. In existing TPFs with the circuit breakers’ wiring not yet modified, simulate the TT signal by activating appropriate inputs of the IOM located in the DC switchgear. Verify correct operation of the transfer trip circuits and logic by confirming correct response of the circuit breakers in the replacement TPFs included in the TT zone (per the breaker trip logic tables), as well as successful reclosing of the tripped circuit breakers. In existing old TPFs not yet wired into the ETTS loop, confirm that the appropriate output of the IOM in the DC switchgear for transfer-trip of the required circuit breaker has been activated. If an existing TPF is already in service with the new ETTS wiring fully connected, use the same approach to confirm the correct TT responses, as in the replacement TPFs.

5. The correct response and operation of the listed below ‘equipment trouble’ alarms for each ETTS device and facility shall be confirmed by the following field tests:

a. disconnecting the hard-wired trip circuit to the TP site BLS;

b. disconnecting, one at a time, the fiber-optic links between pairs of IOMs;

c. disconnecting the fiber-optic cable between the DIOM in the ETTC and the ETP in the nearby TCR;

d. removing the power supply of IOMs located outside of the ETTC;

e. removing the power supply to the ETTC; and

f. in case of a TPSS with CR gap bypass disconnect switches, confirming the proper operation of the switches’ auxiliary contacts used for indication to the ETTS of the disconnect switches’ open and closed positions.

6. For all tests per scenarios described above, verify that accurate alarm signals are generated by the LCs and are received at the alarm screen of the C02 PLC, and at the workstation or laptop computer connected to the control network switch in the C04 panel, emulating the interfaces with the integrated computer system (ICS) and emergency back-up panels (EBP1, EBP2).



7. At each new TPSS, where such a test has not been carried out, perform a test to prove that remote access from the maintenance network switch to each LC via its USB port is available and functioning properly.

3.05 SYSTEM INTEGRATION TESTING (SIT) AND COMMISSIONING

A. General: SIT for the ETTS shall be performed in accordance with Contract Specifications Section 01 45 24, Testing Program Requirements, and the SIT-related requirements of Contract Specifications Section 34 21 80, Traction Power System Field Acceptance Testing.

B. Sequencing of the Commissioning of Individual ETTS Loops: The ETTS communication loops may comprise a combination of replaced, and existing old or new TP facilities. If the final ETTS loop contains more than one replaced TP facility, the field testing, SIT and commissioning of the loop shall be carried out in stages involving interim configurations with partial loops. The interim configurations are outlined in Article 2.01 Functional Requirements under Part 2 herein and as detailed on the Contract Drawings.

END OF SECTION 34 21 35