revision no. 2proc.greaterdaytonrta.org/docs/21-01/cifb gd 21-01 34 21... · 2021. 2. 12. · the...

GREATER DAYTON RTA SUBSTATION UPGRADE PROJECT

General Requirements for Traction Power Equipment 34 21 01-1

REVISION NO. 2

SECTION 34 21 01 GENERAL REQUIREMENTS FOR TRACTION POWER EQUIPMENT

PART 1 GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Special Conditions apply to this Section.

1.02 SUMMARY

A. This section sets forth the conditions and technical requirements for the installation of traction power equipment in a Prefabricated Substation Enclosure.

B. The traction power substation shall comprise the specified electric supply equipment and associated basic electric materials housed in a factory fabricated and assembled weatherproof enclosure. If the substation is required to be split for the purpose of initial shipping, it shall be capable of being split at the shipping interfaces for relocation after initial installation. It shall be of proven design for the intended purpose. The substation enclosure and the electric supply equipment shall be product of manufacturers experienced and regularly occupied with providing similar fully integrated factory assembled substations for the electrified trolley bus transit systems.

C. The substation electric supply equipment will be used to convert 12.5 kV, three phase, AC primary power to 600-volt nominal DC power for transit vehicle operation. The equipment will also provide low voltage AC power service for the substation auxiliaries, such as HVAC and lighting.

D. The power service to the substation will be furnished by Dayton Power and Light Company (DP & L) at the service voltage of 12.5 kV, three phase, 60 Hertz.

E. The AC switchgear, DC switchgear and rectifier will be remotely monitored by the dispatcher’s office, controlled by the line shop supervisor’s office and substation maintenance contractor by means of the supervisory equipment and locally by linemen by means of control switches integral to the equipment. The substation will normally be unattended.

F. Elevation at the substation site will vary between 650 and 1050 feet above mean sea level. Outdoor temperature range will be approximately -26 F with wind chill of -50 F to +104 F and relative humidity up to 100%. The temperature, altitude, and atmospheric conditions as set forth herein, must be incorporated in the design criteria of all equipment.

G. All equipment supplied shall be of most modern design and of the highest commercial quality. All items shall be designed and chosen to fit and function correctly in their intended location. It shall be the responsibility of the Contractor that all components covered in this specification, including AC switchgear, rectifier transformer, rectifier, associated rectifier auxiliaries, DC switchgear and anode bus are properly applied and function correctly as a complete rectification substation unit.

H. It is not the intention of this Specification to describe each intricate design characteristic; however, specific requirements shall be met as hereinafter listed,



I. All components shall be built and tested in accordance with ANSI, IEEE, and NEMA standards using the latest supplement issue thereof. It shall be Contractor’s responsibility to verify that the equipment and installation comply with all local codes and local regulations.

J. The substation shall be equipped for both local control and for remote control and monitoring from a central supervisory control system. Contractor shall furnish space in the substation building for the installation of a supervisory cabinet to be furnished and installed by the Contractor. Refer to Section 34 21 70 for Supervisory Control Equipment.

K. Factory wiring, either direct or between equipment components by means of factory made harnesses, shall be used to an extent such that minimum field wiring will be necessary. All wires shall be identified in such a manner as to provide positive identification of interconnections. Terminal blocks shall be used for wiring between equipment components. Terminal blocks shall be provided for all outgoing connections.

L. Installation of traction power equipment shall include designing, manufacturing, testing, installing, and commissioning the following:

1. Prefabricated equipment enclosure.

2. 15kV AC switchgear assembly.

3. Self-cooled, dry type, indoor rectifier transformer.

4. Natural convection air cooled rectifier.

5. 800-volt DC switchgear assembly.

6. Anode bus duct.

7. Negative equalizer bus.

8. Traction power distribution cables and switches.

9. Station batteries, battery chargers, distribution panel board for 125-volt DC control power and accessories.

10. RTU Cabinet.

11. Heating, ventilating, and air conditioning units.

12. Lighting.

13. Other ancillary equipment as needed.

1.03 SUBMITTALS

A. Calculations, product data, catalog cuts, shop drawings, schematics, layouts, test and inspection reports, and any other items relevant to the design, performance, interface, maintenance and operation of the substations or equipment to be installed shall be submitted to the RTA for review and approval before work commences.

B. Coordinate each submittal with design, fabrication, purchasing, testing, delivery, and any other submittals or related activities.

1. Submittals will be returned to the contractor as:

a. Approved: The submittal is acceptable to the RTA and work related to the submittal may proceed.



b. Revise and resubmit: One or more items contained within the submittal is not acceptable to the RTA and work related to the submittal may not proceed. Resubmit with corrected or revised information.

c. Approved as noted: Work may proceed provided the Contractor accepts all notes and direction that the RTA or its authorized representative added to the submittal. Should the Contractor find that any notes or directions that have been returned with the submittal are unacceptable, resubmit the entire submittal until acceptable to both the RTA and Contractor.

d. Received for Record. This is generally reserved items received for information and does not imply the information contained within is approved.

C. Allow sufficient time for RTA review so that work will not be delayed as a result of the time required to process the submittals.

1. Allow twenty-one (21) calendar days for initial RTA review. 2. The contractor will have up to twenty-one (21) calendar days to return a “Revise and

Resubmit” submittal to the RTA. 3. Allow twenty-one (21) calendar days for reprocessing each submittal. 4. If the number of versions of a submittal review exceeds three (3), the RTA reserves

the right to charge the contractor for review time associated with an excessive number of revisions.

5. No extension of contract time will be authorized because of failure to transmit submittals to the RTA sufficiently in advance of the work to permit processing.

D. Prepare a schedule of all required submittals. Submit the schedule within forty-five (45) days after Notice to Proceed. The RTA reserves the right to add (or subtract) from the schedule of submittals.

E. Shop Drawings

1. Prepare shop drawings that establish the detail of work.

a. Contractor must fully describe all material and equipment incorporated into the work. This includes:

i. Indicating relation to adjoining work. ii. Design details of all general, mechanical, and electrical equipment

including fabrication and installation drawings, coordination drawings, schedules, patterns, templates, and similar drawings.

b. As work progresses, keep records of all revisions, changes, markups etc. on both the shop and contract drawings.

F. Product Data

1. Collect product data into a single submittal for each element of construction or system. Product data includes printed information such as manufacturers installation instructions, catalog cuts, color charts, diagrams, templates, wire diagrams, performance curves, etc.

2. Mark each copy to show applicable choices and options. Mark copies to indicate applicable information when product data also includes information on products that are not required.

G. As-Built drawings

1. All changes, deviations, and other information must be documented on the approved shop drawings as the work progresses.



2. At the end of the project, or project phase as applicable, As-Built drawings incorporating all revisions must be submitted as scanned documents and/or CAD documents (as applicable).

1.04 DESIGN AND PERFORMANCE

A. General:

1. 15kV AC switchgear line-up, rectifier transformer, rectifier and DC switchgear line-up specified herein and shown in single line diagram of the Contract Drawing, shall function as a complete coordinated package for normally unattended operation of the RTA’s system. All components shall be sized and selected for safe, reliable operation. All material and equipment furnished shall be of the highest quality material, design, and workmanship.

2. The traction power substation enclosure design requires that 15kV switchgear line-up, rectifier transformer, rectifier and 800-volt DC switchgear line-up specified herein shall be designed in such a manner as to permit easy installation for the equipment arrangement. It also sets forth certain limiting area dimensions which shall be maintained for the RTA’s usage exclusively and minimum clearances as required for safe operation.

3. Equipment dimensions shall be such that any piece can be removed from the housing through the door or passage in the future without dismantling other equipment. Final arrangement of equipment and manner of assembly and disassembly will be subject to the approval of the RTA.

4. The supplied 15kV AC switchgear shall be subject to approval by DP&L.

B. Service Conditions:

1. The AC switchgear line-up, rectifier transformer, rectifier and DC switchgear line-up herein will serve as supply for the Greater Dayton RTA’s transit system in parallel with the existing traction power equipment installed at other locations. Individual rectifier load can be expected to vary from 100% stabilized current to150% full load current rating for 2 hours; followed by 200% for 60 seconds to zero current during non-operating periods. High voltage spikes of either polarity from trolley bus operations may be transmitted to these substations through the interconnected systems.

2. The existing trolley buses in the system employ regenerative braking and the traction power substation must be designed accordingly. Voltage spikes and transients of either polarity, induced by switching, vehicle operation or lightning will occur on both positive and negative feeder cables in the RTA’s DC distribution facilities, which are normally ungrounded.

3. The equipment arrangement shall result in a minimum space requirement for the entire substation area and optimal accessibility for equipment maintenance. Design and construction shall be chosen to give a pleasing and homogeneous appearance. Units of the same rating shall be identical and interchangeable.

4. The AC supply for the rectification equipment will be taken directly from Dayton Power and Light 12,540-volt, 60 Hz, 3 phase AC system. Available short circuit MVA and X/R ratio at the substation will be provided within 30 days of the Contract award. While it is not expected, but if this installation will present any harmonic or telephone interference problems, the contractor shall give immediate and full engineering support in determining proper corrective measures including the preparation of specifications for additional equipment if required.



C. Control and Supervision:

1. The rectification equipment specified herein will normally be in continuous service. However, it shall be provided with control and supervision features such as to safeguard the various equipment and to permit both local and/or supervisory control.

a. Not all devices referred to are to be supplied under this specification nor are all devices to be furnished herein listed. These devices have been included in the discussion hereinafter so that the Contractor will have a better understanding of the integration of the equipment supplied with the overall control and supervision scheme. The actual equipment to be supplied under this specification is listed herein. For purposes of this discussion, the following device numbers shall be used:

DEVICE NO. FUNCTION

1 Master start-stop switch (START-STOP

PULL TO LOCKOUT). 2 Time delay starting or closing. 3 Interlocking Relay. 4 Master control relay.

4X Auxiliary master control relay. 8 DC control power switch - rectifier. 8R AC Auxiliary power switch 26D1 Positive rectifier bank overtemperature

device -First step. 26D1A Negative rectifier bank over temperature device -First step.

26D Positive rectifier bank over temperature Device- Second step.

26DA Negative rectifier bank over temperature Device-Second step

26H Rectifier over temperature detector positive or negative heat bank.

26TH High room temperature. 26TL Low room temperature. 26X Auxiliary relay to 26D and 26DA. 27B Battery failure relay. 27B1 Bus 1 Under-voltage Relay 27. 27B2 Bis 2 Under-voltage Relay 27. 27L Line Under voltage Relay 27. 27BC Battery charger failure relay. 30 Rectifier annunciator. 32 Reverse current trip device. 32P Polarizing coil for DC reverse current trip 33 Substation door alarm. 33B Breaker door position switch. 33R Rectifier compartment door position switch. 33T Rectifier transformer equipment door position

switch. 37B Battery low voltage alarm 43 Rectifier permissive control switch (REMOTE -

LOCAL). 48 Incomplete sequence relay. 49T Trans. winding over temp. device, first step. 49TH Trans. winding over temp. device, second step.



50 Instantaneous overcurrent trip device. 50N Instantaneous overcurrent trip device, ground

instant. 51 Time overcurrent trip device. 51A Time overcurrent trip device, phase time. 51N Time overcurrent trip device, ground time. 52 Rectifier AC breaker. 52/CS/C Rectifier AC breaker control switch – CLOSE. 52/CS/T Rectifier AC breaker control switch – TRIP. 52M Rectifier AC breaker control switch - Spring

charge motor. 52/TC Rectifier AC breaker shunt trip coil. 52/TI AC breaker position switch - Truck interlocking. 62T Rectifier start time delay relay. 63W Sump high water level. 64P Rectifier ground relay, hot structure. 64N Rectifier ground relay, grounded structure. 69 Breaker permissive control switch. 72 Rectifier DC breaker. 72UVT Control power undervoltage trip. 74 Trouble alarm relay. 74X Annunciator relay. 76 DC Overcurrent Relay. 83-1 Auxiliary power transfer switch #1. 83-2 Auxiliary power transfer switch #2.

86 Lockout relay. 86X Conditional lockout relay. 89AC AC line disconnect switch. 89DC DC positive disconnect switch. 89N Rectifier negative disconnect switch. 94 Tripping Relay. 95X Diode fuse monitor - trip. 95Y Diode fuse monitor - alarm. 99Y Surge protection failure relay. 102 Load measuring circuit timing relay. 108 DC control power switch. 108X DC control power switch, load measuring. 124 AC bus tie breaker. 127 Loss of DC control power. 129 Contactor for load measuring resistor. 130 Station alarm annunciator. 150 DC overcurrent relay. 150N AC overcurrent relay, ground instant. 150Y Rate-of-Rise tripping relay. 151 AC Overcurrent relay-time. 151N AC Overcurrent relay – ground time. 152 Incoming line AC breaker. 164P DC switchgear ground relay, hot structure. 164N DC switchgear ground relay, grounded structure. 167 AC Directional Overcurrent Relay. 167N AC Directional Overcurrent Relay, ground time. 169 Permissive control switch (REMOTE LOCAL). 172 DC feeder breaker. 172Y DC feeder breaker auxiliary relay. 172Z DC feeder breaker auxiliary relay. 174 Station trouble alarm relay.



176 Direct acting series trip device. 182 Solid state DC reclosing relay. 182X Load measuring device auxiliary relay. 183 Voltage measuring relay. 186 DC feeder breaker cumulative lockout timing

device. 189DC DC feeder switch. 201 Supervisory close relay. 201D Feeder breaker Emergency Close. 201X Feeder master relay indication relay. 237 SCADA loss of DC backup supply. 243 SDADA control switch. 269 Permissive control indication relay. 283 SCADA loss of AC. 286 Supervisory lockout relay. 294 Supervisory trip relay. 351 Electronic AC Overcurrent relay. 451 Electronic AC Overcurrent relay. 551 Electronic AC Overcurrent relay. AF Air Filter EM Emergency Stop FAT Fire alarm trouble K Mechanical interlock SD Smoke detector. a Closed when breaker or switch closed b Closed when breaker or switch open

2. Starting of the rectifier shall be accomplished by energizing 4X. This shall be accomplished locally by operation of control switch 1 or remotely by supervisory control through operation of 201, or control switch 1 in remote position and the other rectifier of the substation tripped. The following shall prevent energization of 4X:

a. Loss of control voltage.

b. Energization of 86 or de-energization of 86X.

c. Remote lockout through operation of 286.

d. Local operation of control switch1 to the PULL TO LOCKOUT position.

3. Operation of 43 to the local position shall prevent energization of 4X except through operation of control switch 1.

4. Shut-down of rectifier shall be accomplished by de-energizing 4X. This shall be accomplished locally by the operation of control switch 1, automatically by the operation of 4 or loss of control voltage and remotely by supervisory control through operation of 286 or 294. The rectifier shall be shut down by the operation of any of these devices regardless of the position of 43.

5. Energization of 4X shall cause 48 and 62T to time and closure of 52. Closure of 72 shall follow closure of 52 and operation of 62T. If the AC breaker 52 does not close within 5 seconds, 62T will time out and block the closure of DC rectifier breaker 72. Failure of 72 to close and remain closed within a normal length of time shall cause 48 to operate which shall result in lockout. Operation of 43 to LOCAL position will prevent operation of 48 as described above.



6. De-energization of 4X shall cause opening of 52, 72, and shut-down of that rectifier unit.

7. The following safety devices shall operate 86 and cause shut-down of the rectifier until 86 is hand reset. This type shut-down is termed LOCKOUT. Loss of AC control power shall not cause operation of any of these devices:

a. Open door on rectifier diode negative switch compartment and positive 600V bus compartments (Device 33) or open enclosure on transformer.

b. Insulation failure between rectifier components and enclosure (Device 64R).

c. Incomplete starting sequence (Device 48).

d. Rectifier negative disconnect switch open. (Device 89N).

e. Supervisory (Remote) control lockout (Device 286).

f. Rectifier reverse current (Device 32).

g. Failure of two diodes (Device 95X).

8. The following safety devices shall cause operation of 86X and shut-down of the rectifier until the condition is corrected. This type shut-down is termed CONDITIONAL LOCKOUT.

a. Rectifier second step diode heat sink temperature (Devices 26D and 26DA).

b. Transformer second step high winding temperature (Device 49TH).

c. Loss of AC power (Device 27).

9. The following safety devices shall activate the device 74 and cause a TROUBLE ALARM only until the condition is corrected.

a. Transformer first step high winding temperature (Device 49T).

b. Rectifier first step high diode heat sink temperature (Devices 26D1 and 26D1A).

c. Insulation failure between rectifier enclosure and ground (Device 64N).

d. Rectifier surge diverters failure (Device 99Y).

e. Loss of one diode. (Device 95Y).

10. Local supervision shall be provided on the rectifier control cubicle in the form of a back lighted window annunciator (Device 30) to indicate operation of all safety devices listed in paragraphs 1.03.C.7, 1.03.C.8 and 1.03.C.9 above, and other power rectifier criteria as may be deemed essential by the rectification equipment Contractor. Audible alarm for annunciator shall be operable only when 43 is in LOCAL position.

11. Supervisory control will be provided to permit remote control and supervision of the following items. The Contractor shall furnish and connect the necessary contacts to terminal boards.

a. Start and shut-down of the rectifier (Devices 201 and 294 for control and 4X for monitoring).



b. Lockout shut-down of each rectifier (Device 286 for control and 4 for monitoring).

c. DC feeder breakers (Device 172) (Devices 201 and 294 for control, and 201X and 172 for monitoring).

12. The supervisory shall be provided to permit remote supervision of the following items. The Contractor shall furnish and connect the necessary indicating contacts to terminal boards.

a. Rectifier DC breaker (Device 72).

b. Rectifier AC breaker (Device 52).

c. Trouble alarm (Device 74).

d. Positions of permissive control switch (Device 43 for monitoring).

e. Local supervision shall be provided on the DC switchgear auxiliary cubicle door in the form of a back lighted window annunciator (Device 130) to indicate the operation of SCADA cut-off switch, hot and grounded DC switchgear enclosure (separate points), loss of DC power in SCADA, battery voltage and other common functions of the Substation (station alarm Device 174). Each of these annunciator points shall be equipped with an independent contact for auxiliary output. This contact shall open and close to follow field contact wired to terminal blocks for connections to SCADA RTU.

13. The supervisory control shall be provided to permit remote telemetering of the following items:

a. Output current of the rectifier continuously (current transducer for signal).

b. DC bus voltage continuously (DC voltage transducer for signal).

c. DC feeder voltage and current of each feeder continuously (DC voltage and current transducers for signal).

d. AC bus voltage and AC line current of the DP&L line.

14. In addition to the remote telemetering described above, additional transducers shall be provided suitable for high-speed monitoring and recording of current and voltage waveforms for all DC feeders.

15. Supervisory remote monitoring of the following additional items shall be provided:

a. Ambient temperature high and low alarms.

b. Smoke/fire alarm.

c. Door open/entry alarm.

d. Battery charging failure alarm.

D. Protective Device Coordination:

1. The Contractor shall perform a relay and fuse coordination study and shall furnish protective devices in the traction power rectifier equipment as listed elsewhere in this part of Specification, or as may be required, to provide reliable coordinated protection



for the system. All such devices shall be adjustable and shall be factory calibrated to provide the following general protective scheme:

a. Using protective devices on AC switchgear.

i. Operation of fuse on the incoming line disconnect switch for the rectifier transformer internal fault.

ii. Coordination of rectifier transformer secondary AC breaker with primary fuse. (Device 52)

b. Using protective devices on DC switchgear:

i. Pick-up of reverse current device to trip rectifier AC and DC breakers for rectifier internal faults (Device 32).

ii. Pick-up of adjustable polarized discrimination and instantaneous trip devices to trip DC feeder breakers for DC feeder faults. The discriminating trip device shall have operating characteristics and adjustable ranges such as to trip for remote short circuits on the catenary wires and discriminate against tripping for inrush on starting of buses insofar as possible. The instantaneous trip devices shall have operating characteristics such that AC breaker tripping shall not occur on DC feeder faults (Devices 150 and 176).

iii. Load measuring and automatic re-closing features on DC feeder breakers will cause automatic re-closure as soon as the condition that caused tripping is corrected.

c. Using temperature devices on rectifier transformer:

i. Conditional lockout of rectifier following 150 percent of rectifier full load current for approximately 2 hours (Device 49TH).

ii. Transformer temperature device shall trip the secondary AC breaker (Device 52) and be coordinated with incoming line disconnect fuse.

d. Using protective devices on rectifier:

i. Individual current limiting fuse in series with each parallel silicon rectifier element to open for element failure. Provide fuse indicating devices and diode fuse monitor relays as may be required to indicate failure of either element or fuse (device 95Y). Provide for tripping of rectifier for 2nd fuse failure (N-2, Device 95X).

ii. Pick-up of thermal switches on heat sinks to trip DC circuit breaker on heat sink high temperature due to any combination of excessive ambient temperature, reduced heat sink efficiency or excessive base load and load current including short circuits, that would result in failure of rectifier elements and/or fuses before other protective devices on AC and DC switchgear could operate (Device 26D).

e. DC protective devices shall be coordinated with AC protective devices.

E. Relays and Devices:

1. The type of relays and devices used in the control and supervision of the supplied equipment shall have proved successful in similar application over at least a 5-year period of use.

2. All control and instrument switches shall be rotary type provided with properly designated black escutcheon plates, clearly marked with white letters to show



operating position. Breaker control switches shall be spring return. Instrument switches shall have an "OFF" position. Handles shall be solid colored plastic or approved equal. Selection of operating handles shall be as follows:

a. Breaker Control Pistol grip, black.

b. Permissive Control Oval, black.

c. Instrument Knurled round, black.

d. Pistol grip control switches shall be G.E. type SBM or approved equal.

3. All control and auxiliary relays shall be suitable for use in switchgear equipment as defined in the latest issue of ANSI C37.90. Operating coils for direct current relays shall be suitable for continuous operation between 90 volts and 145 volts DC and alternating current relays between 85 percent and 110 percent of nominal rating.

4. All indicating lights shall be LED high output and shall operate with sufficient intensity between 90-145 volts DC. LED shall be visible under 50 fc operating floor lighting and shall not suffer premature failure from battery float or equalize voltage. LED samples of all colors used shall be furnished to RTA for evaluation and approval prior to installation on the equipment.

5. All indicating instruments shall be semi-flushed mounted and shall have metal scales with black figures on a white background. They shall be approximately 4-1/4 inch in size, have taut band suspension, and be of 250-degree scale design.

6. DC control power for each circuit breaker cubicle in 800 volt DC switchgear line-up shall be provided through a sub125 volt DC distribution panel. It shall be located in the auxiliary cubicle of the DC switchgear lineup. A separate circuit breaker from the sub DC distribution panel shall be assigned for the control, tripping, metering and relaying circuits of each DC breaker cubicle.

7. All fuses and disconnect switches shall be located in such a position that they are easily and safely accessible. Minimum current interrupting capability shall be 20,000 amperes with an L/R ratio of 0.05 sec. Minimum voltage rating shall be 600-volt DC for 125 volts and below. All control and monitoring circuits connected to 600-volt DC system shall be rated 1000-volt DC.

8. All devices such as fuses, meters, relays, switches, and lamps shall be suitably identified by plastic tags with black letter on white background and device symbol, and in case of fuses, rating and circuit feed. Identify polarities of fuses and switches. The tags shall be mounted under device with machine screws. Use of self-trappings screws, rivets or adhesives will not be permitted.

9. Each circuit and panel-mounted device shall have a suitable processed plastic nameplate with black letters on white background for proper identification. Nameplate shall be of 1/16-inch thickness and type for specific use and shall be smooth with 0.003-inch Melamine covering as manufactured by Duralith Corp. or approved equal. Each circuit nomenclature will be specified later. Lettering shall be 1/4 inch in height where possible. The nameplates shall be mounted with machine screws. Use of self-tapping screws, rivets or adhesives will not be permitted.

10. Approved tags, identifying DC feeder breaker sections, rectifier DC breakers, AC switchgear units, rectifier transformers and rectifiers shall be provided. Front and back tags for DC breaker sections, rectifier DC breakers and rectifiers shall be 14 inches by 6 inches by 1/8-inch, 3 layers plastic with sunlight yellow surface color on both sides



and black center core (black lettering). Front and back tags for AC switchgear units and rectifier transformers shall be 17½ inches by 3½ inches by 1/8-inch, 3 layers plastic with cardinal red surface color on both sides and white center-core (white lettering). The tags shall be mounted with machine screws. Use of self-tapping screws, rivets or adhesives will not be permitted.

11. Adjustable lugs on tubular resistors of 1.125 inches diameters shall be Ohmite Manufacturing Co., double-thumb screw adjustable lug, Catalog No. 2160, or approved equal. Adjustable lugs on tubular resistors of 0.438; 0.563; 0.750; 1.500; 1.625 and 2.500 diameters shall be Ohmite silver contact, bake-lite knob type Catalog Nos. 2163, 2165, 2167, 2183, 2187 and 2191 respectively, or approved equal. Adjustable lugs of .313 diameter shall be Ohmite silver contact screwdriver type catalog No. 2161, or approved equal.

12. All terminal blocks shall be heavy duty Marathon series 1500, GE type EB-5 or approved equal.

13. All control switches shall be pistol grip GE type SBM, Electro Switch, or approved equal.

F. Miscellaneous:

1. Bolted joints of current carrying members shall be provided with proper spring tension devices to maintain proper joint pressure under load (heat) cycles. For copper to copper joints use Everdure hardware or approved equal, for aluminum to aluminum joints use Belleville washers or approved equal.

2. Copper to aluminum bolted joint shall not be allowed .unless approved by the RTA.

3. Cable and control wires shall be copper.

4. Wiring shall be clearly identified using white plastic slip-on markers with etched black lettering. The marker diameter shall be consistent with the wire diameter to ensure a snug fit, but yet able to be rotated for identification.

5. Device layouts shall provide safe visibility and easy access to all terminal blocks, fuses, switches relays, other miscellaneous devices, and their associated wiring without reaching into blind spots and/or physically climbing into the enclosure. All devices such as fuses, switches, terminal blocks, etc. shall be mounted within 18 inches from the face of the cubicle and be accessible for operation and maintenance. Any device layout which is judged not to be safely maintainable will be rejected.

6. Serviceability under NFPA70E rules shall be taken into consideration for equipment layout with the intent of minimizing arc blast exposure and protective clothing requirements. Furthermore, all equipment shall have appropriate arc blast warning labels attached.

7. Transducers shall be fused separately.

8. Equipment enclosures shall be fabricated in such fashion as to provide sturdiness, durability, and neat appearance. Structures shall provide adequate rigidity to prevent warping, bonding and vibration of panels and doors. Where required, heavier gauge metal and/or extra stiffeners shall be used to insure that doors, panels and appurtenant mountings do not bend or rattle when being accessed for maintenance or, in case of breaker cubicles, when breakers are opened or tripped.

9. Equipment dimensions on drawings will be shown in U.S Standard System in feet and inches (non-metric scale).



10. Wiring terminals shall be ring style compression type or otherwise held captive to prevent wires from dislodging due to loose terminals.

1.05 RECTIFICATION EQUIPMENT DRAWINGS AND DESIGN CONFERENCE

A. Bidder shall submit with the proposal a statement that the equipment to be furnished will not exceed the dimensions shown on the Contract drawings.

B. One Line Diagram, three-line diagram, AC and DC schematics and wiring diagrams shall be prepared utilizing ANSI-IEEE standard device symbols and nomenclature as defined and listed in IEEE Standard C37.2 except where specified otherwise herein. Terminals and terminal block studs shall be clearly marked on all equipment and the markings shall agree with the drawings. All components on the drawings shall be marked to indicate size and rating.

C. All diagrams, drawings and instruction material shall be prepared utilizing the latest issue of AutoCAD in English language and U.S. Standard system of weights and measures. All drawings shall be 22 inches x 34 inches overall. A bar chart (graphic scale) shall be provided on all equipment layout drawings.

D. All CAD diagrams, drawings and instruction materials noted above in paragraphs 1.04B. and 1.04C. shall be turn over to RTA.

E. The equipment manufacturer shall start detail design and drafting work for all equipment immediately upon Award of the Contract and shall process design work to completion without delay and without regard to normal manufacturing schedule.

F. Within ninety (90) days after Notice to Proceed, there shall be a design conference at the equipment manufacturer's facility, which shall be attended by RTA personnel and their authorized agents. A sample agenda for the design conference has been included as Appendix A of this section.

G. During the Design Conference the Contractor shall provide the following:

1. Certified-outlined dimensions and weights of all major items of equipment, namely:

a. Overall dimension of the prepackaged substation enclosure.

b. Equipment layout inside the prepackaged enclosure.

c. Equipment layout shall include at minimum: i. 15 kV AC Switchgear. ii. Traction Power Rectifier Transformer. iii. Anode Bus Duct. iv. 600 Volt DC Silicon Rectifier. v. 800 Volt DC Switchgear. vi. 130 Volt DC Battery. vii. Battery Charger. viii. Battery Racks and DC Distribution Panels. ix. Auxiliary Transformer, and AC Panels x. RTU and Communication Cabinets. xi. HVAC Equipment. xii. Location of doors (entrance and maintenance access).



2. A list of all items the Contractor proposes to substitute for items listed in the Specification. Each proposed item of substitution must be supported by the following information:

a. Device name, catalog number, and device number as shown on the Contract Drawings.

b. Technical and descriptive literature of device.

c. Reason for substitution.

3. Outline of all tests to be performed in the Contractor’s or in the equipment Supplier’s factory.

4. Name of testing laboratory which will perform the tests that cannot be conducted in the Contractor's or the equipment Supplier's factories.

5. Cause of request for the extension of any test report which cannot be submitted within thirty (30) days after the day the test is performed.

6. A list of all problems or conditions which require clarification.

7. The Contractor shall submit six (6) copies, for the RTA's approval, of the detail minutes of the design conference. The minutes shall include all the documents that were submitted by the Contractor during the design conference.

H. Design Conference Cost:

1. Any transportation (air-coach class, and any other necessary) and first class lodging required outside the Dayton area by the RTA personnel, their authorized agents, or their authorized consultants, which are necessary to accomplish the satisfactory inspection of this Contract shall be paid by the RTA and are not be included in the bid price. It is anticipated that one trip for 6 persons and lodging for 5 days and 4 nights will be required for conference.

I. Shop Drawings:

1. Submit six (6) copies of each of the following drawings to the RTA's for review after award of the Contract as scheduled hereinafter. The RTA's review will be general and will in no way relieve the Contractor from fulfilling all of their obligations or guarantees. All equipment outlines plans, and section drawings shall be drawn to scale.

2. Within sixty (60) days after Notice to Proceed:

a. Certified outline drawings indicating overall dimensions, aisle space requirements, location of control and protective devices on panels.

b. Certified floor plans showing dimensions necessary for installing equipment, equipment base details, and entrance available for main and control cables.

c. Certified section views of each non-identical unit showing bus and equipment locations and location of outgoing power and control terminals. Drawings must be in sufficient detail to illustrate accessibility for maintenance and for adjustments while energized.

d. Single line diagram showing all main connections and protective devices, the location of all current, potential, and auxiliary devices, and the devices energized by them.



e. Schematic diagram of transformer, rectifier, AC and DC circuit breaker controls and alarms - these shall include AC schematic and DC elementary diagrams of all circuits.

f. Time vs. current curves for all AC and DC breakers.

3. Within thirty (30) days after return of schematic diagrams marked "Approved”, "Approved as Noted" and "Revised and Resubmit", the Contractor shall resubmit the revised drawings, including:

a. Connection diagrams of each non-identical unit showing the: Internal wiring. Terminal arrangement and marking for each outgoing power and control terminal.

b. Interconnection wiring diagrams showing the external connections between each piece of equipment furnished for the traction power substation work. Interconnection wiring diagrams shall show the terminal blocks of each individual unit and interconnection of each piece of equipment. The interconnection wiring diagram and the wire shall be identified with the color, the cable number, destination and terminal block number, wire identifier and originating terminal block number.

c. Equipment nameplate data.

d. Instrument transformer ratio, phase angle and excitation characteristic curves.

4. Protective Device Coordination Curves.

a. Coordination curves shall be submitted electronically within 120 days after notice to proceed, showing relay and direct acting trip device coordination for all equipment furnished hereunder.

b. Coordination curves shall include plot of rectifier design capability and shall clearly indicate actual margin of coordination (from breaker trip to design capability) at each of 150 percent, and 200 percent full load current and short circuit, taking into account derating due to current imbalance and loss of one leg in each phase.

c. Final coordination will be subject to the RTA’s approval.

J. After final review, and prior to the construction, all drawings, diagrams, material lists, recommended support parts shall be issued for the construction.

K. Test Costs:

1. Prior to shipping of equipment, numerous factory tests will be required as covered in sections 34 21 11, “Traction Power Equipment Testing” and section 34 21 12, “Traction Power Inline Test on Rectification Equipment” of the this specification.

2. Any transportation (air-coach class, and any other necessary) and first class lodgings required outside the Dayton area by the RTA’s personnel, their authorized agents or their authorized consultants which are necessary for witness the factory testing and to accomplish the satisfactory inspection of this contact shall not be included in the bid price. The cost of witnessing the initial tests will be paid by the RTA.

3. If additional trips are required due to problems developed because of the negligence of the Contractor, the cost of those trips shall be borne by the Contractor.



1.06 EXPERIENCE

A. The Contractor shall submit sufficient evidence that the equipment manufacturer has a minimum of 5 years current experience in the successful manufacture of silicon rectifier conversion equipment for rapid transit substation systems and equal experience as prime equipment Contractor for rapid transit conversion substation systems, or the Contractor shall demonstrate, to the satisfaction of the RTA, equivalent experience or knowledge.

B. The Bidder shall submit sufficient evidence that the manufacturers of the subcontracted major equipment have a minimum of 5 years current experience in successful manufacture of the generic type of equipment proposed.

C. The Bidder shall submit sufficient evidence that the equipment of the subcontracted manufacturers, by generic type, have been used successfully by the Bidder for rapid transit conversion substation systems for at least 5 years.

D. Evidence submitted shall include a list of users’ name, telephone number and length of time in service.

E. The right is reserved to reject bids when, in the opinion of the RTA, insufficient evidence is submitted to establish the experience requirements of this specification.

END OF SECTION



APPENDIX A DESIGN CONFERENCE AGENDA

A. FACTORY TOUR

1. Observe fabrication of existing orders.

2. Observe engineering capabilities. B. GENERAL REQUIREMENTS

1. Review project job schedule so everyone understands the need for specified schedules of engineering, drawings, manufacturing, delivery, installation, test, checkout, and startup.

2. Establish and identify the following:

a. Overall Project Manager b. Project Coordinator

c. Chief Rectifier Engineer d. Contracts Engineer e Substation Design Engineer f. DC Switchgear Engineer g AC Switchgear Engineer h. Transformer Engineer i. Battery equipment Engineer j. Building structure Engineer

3. Set up procedure for design communications and chain of responsibility for:

a. Greater Dayton RTA b. Equipment Supplier c. Contractor d. Review time for communication response e. Project management system.

4. Review procedure for issuance and approval of Shop Drawings including, but not limited

to:

a. Number, size, and type of drawings. Title blocks. b. Approval time and schedule. c. Compliance approval and release for manufacturer. d. Identification and marking of drawings. e. Shop Drawing Schedule related to construction and installation schedules.

5. Discuss possible methods of shipment, protection, schedule of shipment, breakdown of

equipment with shipping splits, and coordination of equipment delivery to installation contractor.

6. Discuss each type of equipment being furnished and design data and calculations required by Specifications. Discuss installation Hold Points.

7. Discuss basic design data needed to proceed with installation specifications and

drawings for substation buildings and services.



8. Discuss questions and specification relative to mode of operation, maintenance, support

equipment, availability of support equipment, operations and maintenance manuals and data.

9. Review procedure and preliminary data for factory tests, in-line tests on equipment to

insure a common basis for comparison of rectifier characteristics. 1. Establish location, sequencing and timing for these tests.

a. AC& DC switchgear b. Anode bus duct c. Rectifier d. Transformer e. In-line f. Require approved test procedure and final drawings 3 weeks (min) prior

to testing

10. Review test result reports with essential calculations and data required.

11. Review procedure for approval and acceptance of factory, in-line, and other tests.

12. Review procedure and schedule for field testing, checkout, and startup. 13. Requirements of manually operated control devices.

14. Indicating lamps shall be as specified.

15. Confirm addendums received, if any.

16. Schematic and wiring diagrams shall be as per RTA format.

17. Fuses for control circuits shall be 600 volts minimum for 125 VDC and below and 1000 VDC for all other circuits and shall have a minimum current interrupting capability of 20,000 amperes at 1000 VDC, with an L/R ratio of 0.05 seconds.

18. Submit data as to proposed control relays and devices for rectifiers, AC and DC

switchgear, etc.

19. Bolted copper bus connections shall be silver plated. Bolted aluminum to aluminum connections shall be nickel plated.

20. All wire and cable shall be copper and in accordance with the National Electrical Code.

21. All indicating instruments shall be semi-flush mounted, taut band suspension, etc. or as

approved in writing by the RTA.

22. Device identification as specified. 23. Discuss Checklists

C. DETAILED LIST OF DISCUSSION POINTS:

1. Prefabricated Building



a. Size, construction, foundation b. Code requirements c. Appearance d. Shipping splits, shipping method e. Equipment layout f. Egress and equipment doors g. Access doors and panels h. Grounding and isolation i. Lighting and general electrical j. HVAC k. Cable entrance l. Watertight, weather resistant

2. Transformer-Traction VPE Dry Type

a. Certified dimensions and weight b. No-Load losses c. Enclosure

1.Outdoor vents 2. Blowing snow protection 3. Heaters d. Location of bus duct and bus duct support. e. Location of incoming primary cables, coordinate with drawings f. Location of control cable entrance, coordinate with drawings g. HV compartment and barrier h. Access i. Lifting and jacking points j. Testing requirements 3. Transformer-Auxiliary Control Power a. Certified dimensions and weight b. Construction type c. Size d. Ventilation requirements. e. Access f. Disconnect means g. Testing requirements

4. Anode Bus

a. Bus size, spacing, bracing, and configuration. b. Dimensions and construction details, including weight. c Duct supporting means-no external supports d. Location with respect to transformer and rectifier. Minimum distance between

transformer and rectifier shall be 6 feet. e. Shipping split sections. f. Location of insulated section of bus duct. g. Heaters h. Discuss testing as per specifications.

5. Rectifiers

a. Certified base dimensions, mounting details, clearance dimensions, and weight. b. Location of negative cable entrance – top and bottom, coordinate with drawings c. Location of positive cable entrance – top and bottom, coordinate with drawings



d. Location and detail of anode bus takeoff and supporting means-no external supports

e. Location of control cable entrance, coordinate with drawings f. Location of control (and negative disconnect switch) equipment. Need physical

barrier between control and power sections. g. Location of ground fault relay for ground connection. Ground detector must

function without damage up to 800 volts above ground. h. Details of rectifier cooling configuration. i. Details of surge protection circuitry. j. Details of diode current balancing circuitry. k. Number of diode legs per phase. l. Review of coordination curve. m. Review data and calculations required under Specifications. n. Details of recommended handling procedure. o. Details and arrangement of floor insulation system, levelness, flatness and

anchoring system. p. Detail for removal and replacement of diodes for maintenance. q. Cable supports for 1000 MCM cables. r. All rectifiers have specified number of annunciator targets. s. Details of construction of rectifier. t. Interchangeability of diodes, fuses, interconnecting links without affecting current

balance. u. Diode assembly keying to prevent interchange of incorrect assemblies. v. How is correct diode clamping established to insure against uneven pressure on

diode relative to heat sink. w. Discuss type and arrangement of diode heat sink thermal devices. x. Matched diodes not acceptable for satisfying current balance requirements. y. Rectifier assemblies shall include hinged doors with rubber gasketed safety glass

panes or equivalent and all sections. z. Identify the rectifier 89N switch contractor proposes to use. aa Discuss snubber circuit.

6. AC Switchgear

a. Certified base dimensions, mounting details, clearance dimensions and weight. b. Location and dimensions of power cable entrance, coordinate with drawings c. Location and dimensions of control cable entrance, coordinate with drawings d. Location and detail of ground connections. e. Location for DC control power connections. f. Detail of auxiliary transformer compartment. g. Detail of line metering compartment. h. Shipping section splits. i. Detail of test cabinet. j. Standard control schematic. k. Detail of bus tie compartment. l. Discuss detail of DP&L delivery of metering current and potential transformers. m. Discuss details of relays and relaying scheme. n. Discuss anchoring method o. Discuss ComEd requirements

7. DC Switchgear

a. Certified base dimensions, mounting details, clearance dimensions, and weights. b. Location and dimensions of power cable entrance coordinate with drawings. c. Location and dimensions of control entrance coordinate with drawings. d. Location for and type of relays used in feeder breaker reclosing and ground



detection schemes. e. Discuss feeder section control circuits. f. Locations for and size of load measuring resistors and discuss load measuring

scheme. g. Test cabinet shall be integral with auxiliary cubicle. h. Shipping sections split. i. Details of isolation insulation between units switchgear anchoring method. j. Standard control schematics. k. Details for auxiliary compartment and umbilical cord operation. l. Discuss switchgear wire. m. Confirm that contractor will supply redundant over-current trips for feeder

breakers and redundant reverse current trips for rectifier breakers. n. DC feeder cables to be 1000 KCM stranded cable with EPR insulation. Cable

supports shall be provided, so that cables are supported when disconnected. o. All control circuits to be D.C. No inverter (D.C. to A.C.) is allowed. p. Certification of all ratings required for D.C. breakers. q. Short circuit study r. Cable isolating links

8. Battery, Chargers, and Racks

a. Establish size for each substation. b. Battery rack c. Battery type and construction

9. Interconnections

a. Wire identification include cable number, destination location and terminal number, wire identifier and originating terminal block number.

b. Discuss Hold Points D. OPEN DISCUSSION

1. Identify potential conflicts between contract requirements and equipment supplied 2. Identify potential risks during factory and field testing and contingency plans 3. Open discussion

END OF APPENDIX A

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