mission.sfgov.orgmission.sfgov.org/OCA_BID_ATTACHMENTS/FA22986.pdf · A. Trailer mounted engine generator system to provide source of standby emergency power, ... one-line diagram

PIER 50D EMERGENCY POWER MODIFICATIONS PROJECT 2756

16620 - 1 Trailer Mounted Engine Generator System

SECTION 16620

TRAILER MOUNTED ENGINE GENERATOR SYSTEM PART - GENERAL 1.1 SECTION INCLUDES

A. Furnish an Integrated Standby Modular Power System (MPS) consisting of two 300kW trailer mounted diesel generator units and two Automatic Transfer Switches. The diesel generators shall furnish electrical power at 277/480VAC, 3 Phase in the event of normal supply failure. The generator shall consist of liquid cooled engines, with AC alternators and system controls with all necessary accessories for a complete operating system. Each generator shall be furnished in single sound attenuated enclosure as specified in this contract document. The total system capacity shall be 600kW.

B. The product being purchased under this contract is for the Port of San Francisco

located at Pier 50 Shed D. The product being purchased comprises of furnishing of (2) 300kW, 277/480VAC, 3 Phase generators and (2) 800A, 277/480V, 4 pole Automatic Transfer switches and as specified under these Contract Documents. All generators and automatic transfer switch shall be furnished by a single vendor who will take sole responsibility for compliance to the specifications, coordination among the different manufacturers to the product delivering them to the City.

1.2 REFERENCES

A. General

1. ANSI/NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum).

2. ANSI/NEMA MG 1 - Motors and Generators.

3. ANSI/NFPA 70 - National Electrical Code.

4. ANSI/NEMA AB 1 - Molded Case Circuit Breakers.

5. NEMA ICS 1 - General Standards for Industrial Control and Systems.

6. NEMA ICS 2 - Standards for Industrial Control Devices, Controllers, and Assemblies.

7. NEMA ICS 6 - Enclosures for Industrial Controls and Systems.

8. UL 1008 - Standard for Standby Generator and Automatic Transfer Switches



B. Automatic Transfer Switch

1. Automatic transfer switch shall be UL1008 listed, CSA certified, comply with

the NEMA ICS 2-447, and conform to applicable requirements for NFPA 70, 99, and 110.

1.3 SYSTEM DESCRIPTION

A. Trailer mounted engine generator system to provide source of standby emergency power, with stationary mounted automatic transfer switch and skid mounted diesel fuel tank.

B. This specification covers the equipment and services necessary for the design,

manufacture, factory testing, installation, and site testing of a complete and operable on-site integrated Modular Power System (MPS) composed of two 2- 300 kW, 277/480 VAC 3 Phase, 4 wire (reconnectable, 277Y/480V) diesel engine-driven generator set and all devices and equipment specified herein, or required for the service. Equipment shall be new, factory tested, and delivered ready for installation.

C. System controller that provides load management capabilities and single point of

communication and control.

D. Generator Connection Cabinet - The generator connection cabinet shall have adequate mechanical lug capacity to accommodate multiple conductors for two or more planned generators. The intent for this assembly is to create a connection point for multiple-smaller generator power conductors and to reduce the number of outgoing conductors to automatic transfer switches.

E. Tandem Axle Trailer for each generator.

1.4 SUBMITTALS

A. Submit shop drawings and product data

B. Submit shop drawings showing plan and elevation views with overall and interconnection point dimensions, fuel consumption rate curves at various loads, ventilation and combustion air requirements, and electrical diagrams including schematic and interconnection diagrams.

C. Submit product data showing dimensions, weights, ratings, interconnection points,

and internal wiring diagrams for engine, generator, control panel, automatic transfer switch, battery, battery rack, battery charger, exhaust silencer, vibration isolators and skid mounted diesel fuel tank.

D. Submit automatic transfer switch catalog sheets showing voltage, switch size, ratings

and size of switching and overcurrent protective devices, operating logic, short circuit



ratings, dimensions, and enclosure details.

E. Manufacturer's Installation Instructions: Indicate application conditions and limitations of use stipulated by Product testing agency specified under Regulatory Requirements. Include instructions for storage, handling, protection, examination, preparation, installation, and starting of Product.

F. Submit 6 copies of Warranty

1.5 OPERATION AND MAINTENANCE DATA

A. Submit operation and maintenance data. Minimum required is six (6) O&M Manuals. Organize the manuals logically, starting with a complete project description, including equipment serial numbers for genset, transfer switch and fuel tank description of major components; followed by safety precautions.

B. Include instructions for normal operation, routine maintenance requirements and

recommended time intervals, service manuals for engine/generator, automatic transfer switch and fuel tank, oil sampling and analysis for engine wear, and emergency maintenance procedures.

C. System one-line diagram showing all of the system components provided by vendor

or others.

D. System point-to-point diagram showing external power cable and control wiring between system sub components. All wire landings shall be shown with terminal block designation and location, and all plug/receptacle pin and socket data.

E. Internal control wiring diagrams showing connection of control and monitoring

equipment such as PLC, relays, monitoring devices, control operators, and LEDs.

F. Copies of warranty and service maintenance contract shall be included in O&M Manual.

1.6 QUALIFICATIONS

A. Manufacturer: Company specializing in packaged engine generator system with minimum ten (10) years documented experience. Transfer switch shall be a product of engine generator manufacturer.

B. Supplier: Authorized distributor of engine generator manufacturer with service

facilities within 75 miles of project site. 1) Energy Systems 2) Centennial Distributors 3) US Energy



1.7 DELIVERY, STORAGE, AND HANDLING

A. All equipment procured under this contract including the trailer mounted generators , the automatic transfer switches and generator connection box shall be delivered to CCSF Central Shop, 1800 Jerrold Ave., San Francisco, CA, 94124.

B. Prior to shipment, include corrosive-inhibitive vapor capsules in shipping containers,

and related equipment as recommended by the capsule manufacturer. 1.8 REGULATORY REQUIREMENTS

A. Conform to requirements of NFPA 70.

B. Furnish products listed and classified by UL testing firm acceptable to authority having jurisdiction as suitable for purpose specified and indicated.

C. The Permits – PERP/Bay Area Air Quality Management Board (BAAQMB) is

changing the requirements for emissions on standby generating systems.

1.9 WARRANTY

A. The complete electrical power system (generator set, controls, automatic transfer switch, fuel tank and associated switches, switchgear and accessories), as provided by the single-source manufacturer, shall be warranted by said manufacturer against defects in materials and workmanship for a period of five years or 1600 generator operating hours, whichever occurs first from the Date of Substantial Completion. Said coverage shall include parts, labor, travel expenses, and labor to remove/reinstall said equipment, per the manufacturer’s standard published limited warranty. There shall be no deductibles applied to said warranty.

1. 10 MAINTENANCE SERVICE

A. After Sales Purchase by owner (service contract for packaged engine generator system and automatic transfer switch for two (2) years with quarterly maintenance calls from Date of Substantial Completion. Service contract shall be with factory authorized service provider and shall include all manufacturer recommended maintenance tasks for the set over the two (2) years). Documentation of service work shall be required in the contract.

B. Show how to order parts: name, address, and phone number.

1.11 SPARE PARTS

A. Provide two additional sets of fuel, oil, and air filter element required for the engine generator system.



PART 2 - PRODUCTS 2.1 ACCEPTABLE MANUFACTURERS

A. Engine-Generator Set: Generac Model #SD3004803L2 or approved equal (Engine shall be Tier III EPA Approved and Certified). Should any substitutions be made, the supplier shall bear responsibility for the installation, coordination and operation of the system as well as any engineering and redesign costs which may result from substitutions. If supplier intends to propose alternate equipment, such equipment shall be submitted to engineer 14 days prior to bid date for consideration and approval. As part of the submittals, the substitute automatic transfer switch/es wiring diagrams and schematics. A separate list of all printed circuit boards with part numbers and current pricing must also be included. Generator set not approved prior to bid shall not be accepted as a substitute.

B. Automatic Transfer Switch: Generac or approved equal. Equipment specifications for ATS units are based on Generac Power System product with digital microprocessor - based controls for the purpose of a “Single source/single responsibility & warranty” for the entire system. However, equal ATS manufactured by other manufacture that meets the requirement of this specification is acceptable, if approved by the Engineer.

2.2 ENGINES

A. The system shall consist of engine-generator set modules with internal paralleling equipment. 1. The system shall include 2 generator set modules in which the prime movers

shall be liquid cooled, diesel fueled, turbocharged after cooled engines of 4-cycle design. They will each have a I-6 cylinder block with a minimum displacement of 10.3 liters (824 cubic inches), with a minimum rating of 463 BHP. The units shall each require a minimum rated output of 300 kW at an operating speed of 1800 RPM.

2. Each generator shall include a single generator controller that performs all

genset control and paralleling functions. 3. Each generator shall include a cycle rated paralleling switch using proven

contactor technology. The generator paralleling switch shall be mounted in the generator connection box. Solutions utilizing motor operated or stored energy breakers for generator paralleling shall provide documentation of cycle rated suitability.

B. The engine is to be cooled with a unit mounted radiator, fan, water pump, and closed

coolant recovery system providing visual diagnostic means to determine if the system is operating with a normal engine coolant level. The radiator shall be designed for operation in 122 degrees f, 50 degrees c ambient temperature.



C. The intake air filter(s) with replaceable element must be mounted on the unit. Full pressure lubrication shall be supplied by a positive displacement lube oil pump. The engine shall have a replaceable oil filter(s) with internal bypass and replaceable element(s). Engine coolant and oil drain extensions, equipped with pipe plugs, must be provided to outside of the mounting base for cleaner and more convenient engine servicing. A fan guard must be installed for personnel safety.

D. The engine shall have a battery charging DC alternator with a transistorized voltage

regulator. Starting shall be by a solenoid shift, electric starter. E. The engine fuel system shall be designed for operation on No. 2 diesel fuel. A

primary fuel filter, water separator, manual fuel priming pump, fuel shutoff solenoid and all fuel lines must be installed at the point of manufacture.

F. The primary diesel fuel filter shall be capable of removing contaminants of 10

microns. Element shall be replaceable paper type. G. The engine shall have (a) unit mounted, thermostatically controlled water jacket

heater(s) to aid in quick starting. The wattage shall be as recommended by the manufacturer. Provide a branch circuit from normal utility power for generator ancillary device power.

H. Sensing elements to be located on the engine for monitoring and protection of

generator system per the requirements of NFPA 110 level 1. These sensors are to be connected to the control panel using a wiring harness with the following features: wire number labeling on each end of the wire run for easy identification, all resistive based sensors are to be conditioned to a 4-20ma signal level to enhance noise immunity, all sensor connections shall be sealed to prevent corrosion and all wiring to be run in flexible conduit for protection from the environment and any moving objects.

I. Provide the following items installed at the factory:

1. The manufacturer shall supply its recommended stainless steel, flexible

connector to couple the engine exhaust manifold to the exhaust system. 2. The fuel system for the 10.3L engine shall include a 183 gallon (usable),

double wall base mounted fuel tank. It shall have a stub-up area convenient for electrical conduit entry. It shall have the structural integrity to support the engine-generator set and carry the UL 142 mark. Minimum features shall include all welded construction, a fuel filler cap, electronic and manual fuel gauge, electric fuel level sensor, fuel line check valve, vent and fittings for fuel supply, return, fill and emergency vent. This tank must be supplied by the engine-generator set manufacturer and be installed before shipment.

3. Supply the skid mounted base tank with emergency venting per NFPA 37.



J. The 10.3L engine speed shall be controlled by isochronous governor with no change in alternator frequency from no load to full load. Steady state regulation is to be 0.25%.

K. One step load acceptance shall be 100% of engine-generator set nameplate rating and

meet the requirements of NFPA 110 paragraph 7.13.7 L. The system shall be sized and sequenced to allow emergency system loads as defined

by NEC 700 and NFPA 110 to be transferred onto the generator(s) within 10 seconds. Non-emergency system loads will be sequenced onto the generator(s) as generator capacity comes on-line.

2.3 ALTERNATORS

A. The MPS system modules shall be equipped with the following alternators:

1. The alternators on each 300kW module shall be a 4 pole revolving field type, 12 lead, wired for 277/480 VAC 3 phase, 60 Hz, upsized to 350 kW with permanent magnet driven generator (PMG) excitation support.

B. The alternators shall meet temperature rise standards for Class "H" insulation; operate

within Class "F" standards for extended life. All leads must be extended into an AC connection panel in each generator set.

C. The generator shall be equipped with a brushless exciter and permanent magnet

generator (PMG). Both the PMG and rotating brushless exciter shall be mounted outboard of the bearing. Photosensitive components will not be permitted in the rotating exciter. The system shall supply a minimum short circuit support current of 300% of the rating (250% for 50Hz operation) for 10 seconds. The rotating exciter shall use a three phase full wave rectifier assembly protected against abnormal transient conditions by a surge protector.

D. The alternator(s) shall be protected by advanced control panel protective functions.

The alternator shall be dynamically protected against overloads, short circuits, and load imbalances through thermal predictive modeling based upon measured positive, negative, and zero sequence currents. The power system should be protected by instantaneous and steady state protective settings on system voltage, frequency, and power levels.

E. A solid state voltage regulation function shall control output voltage by varying the

exciter magnetic field. The voltage control function shall provide + or - 0.25% steady state regulation. Should a heavy load transient lower the output frequency, the regulator function shall have an engine unloading algorithm that improves the engine's transient performance. The engine unloading algorithm shall reduce voltage at a rate greater than the standard Volts per Hertz under-frequency protection. The regulator function set-points shall be secured with password protection to enhance system reliability.



F. A panel that is an integral part of the generator set must be provided to allow the

installer a convenient location in which to make electrical output connections. A fully rated, isolated neutral must be included by the generator set manufacturer.

G. The electric plant (engine and alternator) shall be mounted with internal vibration

isolation onto a welded steel base. H. Provide the following items installed at the factory:

1. A main line circuit breaker carrying the UL mark shall be factory installed.

The breaker shall be rated per the manufacturer's recommendations unless specified below and mounted in the generator set connection box. The breaker shall be connected between the alternator output and the generator's paralleling switch. The breaker shall include auxiliary contacts and shunt trip. The breaker shall provide a means of disconnect at the generator and provide a redundant means of generator bus separation.

2.4. GENERATOR CONTROLLER

A. The generator control system shall be a fully integrated microprocessor based control

system for standby emergency engine generators meeting all requirements of NFPA 110 level 1.

B. The generator control system shall be a fully integrated control system enabling

remote diagnostics and easy building management integration of all generator functions. The generator controller shall provide integrated and digital control over all generator functions including: engine protection, alternator protection, speed governing, voltage regulation, synchronizing, load-sharing (real and reactive) and all related generator operations. The generator controller must also provide seamless digital integration with the engine's electronic management system if so equipped. Generator controllers that utilize separate voltage regulators and speed governors or do not provide seamless integration with the engine management system are considered less desirable.

C. Communications shall be supported with building automation via the Modbus

protocol without network cards or protocol exchangers. Optional internet and intranet connectivity shall be available.

D. The control system shall provide an environmentally sealed design including

encapsulated circuit boards and sealed automotive style plugs for all sensors and circuit board connections. The use of non-encapsulated boards, edge cards, and pc ribbon cable connections are considered unacceptable.

E. Circuit boards shall utilize surface mount technology to provide vibration durability. F. A predictive maintenance algorithm that alarms when maintenance is required shall



be included. The controller shall have the capability to call out to the local servicing dealer when maintenance is required.

G. Diagnostic capabilities should include time-stamped event and alarm logs, ability to

capture operational parameters during events, simultaneous monitoring of all input or output parameters, callout capabilities, support for multi-channel digital strip chart functionality and .1msec data logging capabilities.

H. The control system shall provide pre-wired customer use I/O: 4 contact inputs, 2

analog inputs, 4 relay outputs, and communications support via RS232, RS485, and an optional modem. Customer I/O shall be software configurable providing full access to all alarm, event, data logging, and shutdown functionality. In addition, custom ladder logic functionality shall be supported to provide application support flexibility. The ladder logic function shall have access to all the controller inputs and customer assignable outputs.

I. The control panel will provide a touch screen display to provide intuitive access to all user pertinent unit parameters including: - Engine and alternator operating conditions - Oil pressure and optional oil temperature - Coolant temperature and level alarm - Fuel level (where applicable) - Engine speed - DC battery voltage - Run time hours - Generator voltages, amps, frequency, kilowatts, and power factor - Alarm status - Current alarms condition per NFPA 110 level 1 - Alarm log of last twenty alarm events (date and time stamped)

J. For system reliability and security concerns, access to and manipulation of the

internal operating parameters and alarm limits shall be conducted via password protected PC based software by trained personnel. System configuration support shall be provided locally or remotely by the manufacturer's servicing representatives.

K. This configuration shall contain a complete automatic engine start-stop control where

a digital signal from remote transfer switches initiates the start and stop functions to the engine.

L. The following equipment is to be installed at the engine-generator set manufacturer's

facility:

1. A 100 dbA alarm horn operated on 12 VDC through the generator common alarm relay shall be supplied by the engine/generator manufacturer.

2.5 SYSTEM CONTROLLER



A. The system controller shall be an integrated microprocessor based solution providing full digital integration with the generator controllers. The system controller shall utilize standard hardware and firmware manufactured by the generator supplier. The use of PLC based solutions will be considered less desirable due to reliability and support concerns posed by custom hardware/custom software solutions. A preference will be shown for designs that use the same control board hardware for both the generator(s) and system controller.

B. To ensure reliability and serviceability, the system controller shall be required to

meet the same requirements as listed for the generator controller in sections 2.3. C. The control panel will provide a touch screen display to provide intuitive access to all

user pertinent system status information. D. The power for the system controller shall utilize redundant DC sources - an internal

DC source inclusive of charging system and an external DC source from one of the generator's cranking batteries.

E. The system controller shall interface with the generators using digital

communications. Any of the generator(s) status, operation conditions, or configuration parameters shall be accessible with a single point communication via the system controller.

F. The system controller shall be mounted on one Generator Trailer and shall provide

sequence of facility load through 3 priority loading (permissive) load steps and 3 load shedding steps. These output parameters function based on the number of generators on the generator bus. The priority loading function provides sequential permissive contact closures enabling load to be transferred onto the generator in response to generators coming on-line. The load shedding function provides contact closures that disconnects load from the generator bus in response to a reduction in available generator capacity.

G. In addition to the communication requirements identified in 2.3, the system controller

shall provide modem communications as standard. H. The system controller and digital communications shall enhance system operation but

neither shall be required to synchronize or operate the generators in parallel. Systems that require external control hardware or digital communications to synchronize and operate the generators in parallel are not acceptable.

I. The design of the system shall allow continued generator paralleled operation with

failures to the system controller and/or communication. Control systems that have any systemic single point failure modes are not acceptable. This is inclusive of the reactive cross current and isochronous load sharing control loops.

2.6 ADDITIONAL UNIT REQUIREMENTS (UNIT ACCESSORIES)



A. The following equipment is to be installed at the engine-generator set manufacturer’s facility: 1. Weather protective sound attenuating enclosure: The engine-generator set

shall be factory enclosed in a 14 gauge steel enclosure constructed with corner posts, uprights and headers. The roof shall be made of aluminum, aid in the runoff of water and include a drip edge. The enclosure shall be coated with electrostatically applied power paint, baked and finished to manufacturer's specifications. The color will be special paint - dark. The enclosure shall be completely lined with 1" thick, UL 94 HF-1 listed, sound deadening material. This material must be of a self extinguishing design. The enclosure is to have large, hinged, removable doors to allow access to the engine, alternator and control panel. The hinges shall allow for door fit adjustment. Hinges and all exposed fasteners will be stainless steel or JS5000. The use of pop rivets weakens the paint system and not allowed on external painted surfaces. Each door will have lockable hardware with identical keys. Padlocks do not meet this specification. The enclosure shall include an air discharge hood that protects the radiator core and directs the hot discharge air upward preventing re-circulating hot air. The enclosure shall be painted in to resists salty water spray/fog corrosions.

2. The exhaust silencer(s) shall be provided of the size as recommended by the

manufacturer and shall be of critical grade. The silencer(s) shall be mounted within the weather protective enclosure for reduced exhaust noise and provide a clean, smooth exterior design. It shall be connected to the engine with a flexible, seamless, stainless steel exhaust connection. A rain cap will terminate the exhaust pipe. All components must be properly sized to assure operation without excessive back pressure when installed.

3. A heavy duty, lead acid 12vdc battery set rated at 925 CCA, BCI group 31

shall be installed by the generator set manufacturer. Provide all intercell and connecting battery cables as required.

4. Provide an automatic dual rate battery charger. The automatic equalizer

system shall monitor and limit the charge current to 10 amps. The output voltage is to be determined by the charge current rate. The charger must be protected against a reverse polarity connection. The battery charger is to be factory installed on the generator set. Due to line voltage drop concerns, a battery charger mounted in the transfer switch will be unacceptable.

2.7 AUTOMATIC TRANSFER SWITCHES

A. The automatic transfer switches shall be Generac standard product or approved equal. Transfer switches shall be designed to interface directly with the PM-SC permissive and load shed requirements. Included are the two-wire start output, terminals for the permissive/enable signals and trip-to-neutral function terminals. However, if third party transfer switches are used with the PM-DCP, they shall provide a two-wire start



to the PM-SC when a utility outage occurs. Additionally, third party switches shall be capable of being inhibited by the PM-SC (prevented from switching load to emergency until permissive is invoked via PM-SC) permissive output, until adequate generator power is available. Ideally, if generator failure should occur during emergency operation, third party switches should be able shed load via trip-to-neutral feature. The advantage is the switch goes to a neutral position; the load is shed and does not re-close to utility that may have a fault present. The minimum alternate to that would be to shunt trip load breakers to shed enough non-essential loads to prevent the system from shutting down. The disadvantage is the shunts have to be reset manually.

B. RATINGS & PERFORMANCE

The automatic transfer switches (2 units shown on 1 line diagram) shall be rated 600 amps or 800amps (3 pole or 4 pole) design, 480VAC rated continuous operation in ambient temperatures of -20 Degrees Fahrenheit (-30 Degrees Celsius) to +140 Degrees Fahrenheit (+60 Degrees Celsius). Main power switch contacts shall be rated for 600 Volt AC minimum. The transfer switch supplied shall have a minimum withstand and closing rating when fuse protected of 200,000 amperes. Where the line side over current protection is provided by circuit breakers, the short circuit withstand and closing ratings shall be 100,000 amperes RMS minimum. These RMS symmetrical fault current ratings shall be the rating listed in the UL listing or component recognition procedures for the transfer switch. All withstand tests shall be performed with the over current protective devices located external to the transfer switch.

C. CONSTRUCTION

1. The transfer switch shall be double throw construction, positively electrically and mechanically interlocked to prevent simultaneous closing and mechanically held in both normal and emergency positions. Independent break before make action shall be used to positively prevent dangerous source to source connections. When switching the neutral, this action prevents the objectionable ground currents and nuisance ground fault tripping that can result from overlapping designs. The transfer switch shall be approved for manual operation. The electrical operating means shall be by electric solenoid. Every portion of the contactor is to be positively mechanically connected. No clutch or friction drive mechanism is allowed, and parts are to be kept to a minimum. The transfer switch shall not contain integral over current devices in the main power circuit, including molded case circuit breakers or fuses.

2. The transfer switch electrical actuator shall have an independent disconnect

means to disable the electrical operation during manual switching. Maximum electrical transfer time in either direction shall be 160 milliseconds, exclusive of time delays. Main switch contacts shall be high-pressure silver alloy contacts with arc chutes to resist burning and pitting for long life operation.



Switches rated at 600 amps or larger shall also have arcing contacts. 3. There shall be a SPDT (form C), 10 ampere, 250 volt auxiliary contact on

both normal and emergency sides, operated by the switch mechanism for monitoring switch position. Full rated neutral bar (or contacts on switched neutral applications) with lugs for normal, emergency and load conductors shall be provided inside the cabinet.

D. CONTROLS

1. All control equipment shall be mounted on the inside of the cabinet door in a

metal lockable enclosure with transparent safety shield to protect all solid state circuit boards. This will allow for ease of service access when main cabinet lockable door is open, but to prevent access by unauthorized personnel.

2. Control boards shall have installed cover plates to avoid shock hazard while

making control adjustments. The solid state voltage sensors and time delay modules shall be plug-in circuit boards with silver or gold contacts for ease of service.

3. A solid state under voltage sensor shall monitor all phases of the normal

source and provide adjustable ranges for field adjustments for specific application needs. Pick-up and drop-out settings shall be adjustable from a minimum of 70% to a maximum of 95% of nominal voltage. A utility sensing interface shall be used, stepping down system voltage of 277/480 vac 3 phase to 24VAC, helping to protect the printed circuit board from voltage spikes and increasing personnel safety when troubleshooting. Signal the engine-generator set to start in the event of a power interruption. A set of contacts shall close to start the engine and open for engine shutdown. A solid state time delay start, adjustable, .1 to 10 seconds, shall delay this signal to avoid nuisance start-ups on momentary voltage dips or power outages.

4. The transfer function shall be inhibited by the system controller until

sufficient electrical power is available. Then the transfer switch logic will monitor the emergency system voltage and frequency. When the voltage (adjustable from 70% - 90%) and frequency (adjustable from 80% – 90%) are stable, the transfer function will be initiated. A solid state time delay, adjustable from 5 seconds to 3 minutes, shall delay the transfer to allow the engine-generators to warm-up before application of load. There shall be a switch to bypass this warm-up timer when immediate transfer is required.

5. Retransfer the load to the line after normal power restoration. A return to

utility timer, adjustable from 1-30 minutes, shall delay this transfer to avoid short term normal power restoration.

6. The operating power for transfer and retransfer shall be obtained from the



source to which the load is being transferred. Controls shall provide an automatic retransfer of the load from emergency to normal if the emergency source fails with the normal source available.

7. Signal the engine-generator to stop after the load retransfers to normal. A

solid state engine cool down timer, adjustable from 1-30 minutes, shall permit the engine to run unloaded to cool down before shutdown. Should the utility power fail during this time, the switch will immediately transfer back to the generator.

8. Provide an engine minimum run timer, adjustable from 5-30 minutes, to

ensure an adequate engine run period. 9. The transfer switch shall have a time delay neutral feature to provide a time

delay, adjustable from .1-10 seconds, during the transfer in either direction, during which time the load is isolated from both power sources. This allows residual voltage components of motors or other inductive loads (such as transformers) to decay before completing the switching cycle. A switch will be provided to bypass all transition features when immediate transfer is required.

10. The transfer switch shall have an in phase monitor which allows the switch to

transfer between live sources if their voltage waveforms become synchronous within 20 electrical degrees within 10 seconds of transfer initiation signal. A switch must be provided to bypass this feature if not required.

11. If the in phase monitor will not allow such a transfer, the control must default

to time delay neutral operation. Switches with in phase monitors which do not default to time delay neutral operation are not acceptable.

12. The transfer switch shall allow a maintained neutral function. Circuitry in the switch will accept a load shed signal from the system controller and drive the contactor to its neutral position.

13. Provide bright lamps to indicate the transfer switch position in either

UTILITY (white) or EMERGENCY (red). A third lamp is needed to indicate STANDBY OPERATING (amber). These lights must be energized from utility or the engine-generator set. Front mounted controls shall include a selector switch to provide for a NORMAL TEST mode with full use of time delays, FAST TEST mode which bypasses all time delays to allow for testing the entire system, or AUTOMATIC mode to set the system for normal operation.

14. Provide manual operating handle to allow for manual transfer. This handle

must be mounted inside the lockable enclosure so accessible only by authorized personnel.

15. Provide a safety disconnect switch to prevent load transfer and automatic



engine start while performing maintenance. This switch will also be used for manual transfer switch operation.

16. Provide LED status lights to give a visual readout of the operating sequence.

This shall include utility on, engine warm-up, standby ready, transfer to standby, in phase monitor, time delay neutral, return to utility, engine cool down and engine minimum run. A "signal before transfer" lamp shall be supplied to operate from optional circuitry.

17. The transfer switches must be capable to wire in a permissive contact form

the Power Manager to inhibit switching to generator power until adequate accumulative generator power is available for given loads. They also must have load shed capability allowing trip-to-neutral./load shed feature.

18. ENCLOSURE

The Automatic Transfer Switches shall be furnished in a NEMA type 4X enclosure with Heavy Duty Marine Coatings.

20. All standard and optional door-mounted switches and pilot lights shall be 16-

mm industrial grade type or equivalent for easy viewing & replacement. Door controls shall be provided on a separate removable plate, which can be supplied loose for open type units.

21. The Automatic Transfer Switches shall free standing type enclosure or to be

included within the main switchboard section line up. 2.8 SUBBASE DIESEL FUEL TANK

A. General: Sub-base diesel fuel tank manufacturer shall have minimum of ten (10) years experience in the design and construction of UL-listed sub-base tank systems. Tank dimension shall match the engine generator skid.

B. Tank Construction

1. Sub-base fuel tank shall be constructed in accordance with Underwriters

Laboratories (UL) Standard UL-142; Flammable and Combustible Liquids Code, NPFA 30; the Standard for Installation and use of Stationary Combustible Engine and Gas Turbines, NFPA 37; and the Standard for Emergency and Standby Power Systems, NFPA 110.

2. The 200 gallon nominal capacity sub-base fuel tank shall be rectangular in

shape with removable end channel for access to electrical stub up and shall include reinforced box channel for generator support, with load rating of 5,000 lbs per generator set mounting hole location. Full height gussets shall be provided at generator set mounting holes and at either end of channel.

3. The sub-base tank shall be baffled separating cold engine supply fuel from



hot returning fuel. 4. Sub-base tank shall be pressure washed with an iron phosphate solution.

Interior shall be coated with a solvent-based film rust preventative, providing inter-operational protection.

C. Tank Secondary Containment Basin

1. Sub-base tank shall include a welded steel secondary containment basin, sized

at a minimum of 110% of the tank capacity to prevent escape of fuel into the environment in the event of a tank rupture.

D. Tank Fittings

1. For Packaged Engine Generator System Per Generac supplied and to meet

California Tank Requirements

E. Vent/Fill/Alarm Accessories

1. Mushroom vent cap for normal venting 2. 24VDC, 50-watt low/high level switch contacts 3. Side-mounted, 24VDC, 50-watt leak detection switch 4. Normal venting shall be sized in accordance with the American Petroleum

Institute Standard No. 2000 for venting atmospheric and low-pressure storage tanks. Sub-base fuel tank shall be provided with atmospheric (normal) vent cap with screen. A second emergency vent fitting shall be provided for the secondary containment portion of the tank if applicable.

5. Emergency Pressure Relief Vent - Emergency vent NPF fitting shall be sized

to accommodate the total capacity of both normal, and emergency vents, and is not less than that derived from NFPA 30, Table 2-8, based on wetted surface area of the tank (calculated based on 100% of primary tank). A zinc-plated emergency pressure relief vent cap shall be furnished. The vent shall be spring-pressure operated. Opening pressure shall be 0.5 psig; full opening pressure shall be 2.5 psig. Limits shall be marked on top of each vent.

6. Raised manual fill cap with lockable flip top.

F. Fuel Piping

1. Engine fuel supply and return piping shall be flexible double wall piping

sized to fit the engine and shall be packaged as part of the engine generator and sub-base fuel tank.



G. The skid mounted fuel tank shall have a continuous level signal through a signal conditioning module providing 4-20 mA output and be equipped with high level alarm at 90% full tank capacity, low level alarm at 50% full tank capacity, and leak detection switches for monitoring and alarms. These discrete output signals shall be brought out in to a terminal block for future connection to a remotely mounted monitoring system.

H. Manufacturers: Generac or approved equal.

2.9 DIESEL ENGINE EXHAUST SILENCER A. The exhaust system shall be provided with an exhaust silencer with muffler

companion flanges and flexible, stainless steel exhaust fittings suitable for orientation and sized in accordance with the engine manufacturer’s instructions.

1. The exhaust silencer shall be hospital grade design with minimum attenuation

level of 42 dB. The silencer shall be fabricated of aluminized steel with a coat of high-heat, rust-inhibiting primer and a top coat of high-temperature resistant, silicone aluminum paint.

2. Manufacturers: As Per Supplied by Generac Power Systems (Critical

Silencer) or equal. B. Flexible Piping Accessories

1. Flexible expansion joint between the generator and exhaust silencer shall be

supplied by the packaged engine generator system manufacturer. 2. Supply and return fuel flexible piping shall be supplied by the packaged

engine generator system manufacturer. 2.10 VIBRATION ISOLATORS

A. Factory installed between the Engine Generator and the Skid to ensure compliance with the latest version of Uniform building Code Seismic requirements.

2.11 GENERATOR CONNECTION CABINETS

A. Generator connection cabinet shall be Generac model MPSACC-CC6000A or

approved equal. The generator connection cabinet shall have adequate mechanical lug capacity to accommodate multiple conductors for two or more planned generators. The intent for this assembly is to create a connection point for multiple-smaller generator power conductors and to reduce the number of outgoing conductors to automatic transfer Switch.

B. The generator connection cabinet shall be supplied as a separate item and be rated 480 volts, 3-phase, 4W, 60Hz. The 3-phase and full-rated neutral copper bussing



shall be rated for 4500 amperes.

C. The cabinet shall be rated for NEMA 3R for outdoor use. D. Manufacturers: Generac or approved equal.

2.12 TRAILERS

A. Custom 12,000 lbs Tandem Axle Trailer for each generator.

B. Trailer shall be furnished with pintle hitch, combo 2 5/16 ball and pintle, electric

brake controller, Outrigger jack stand, electric or hydraulic brakes, brake lights towing hook with locks and towing electrical connectors.

C. Manufacturers: ES Trailer model TES22000, or approved equal.

2.13 SUBSTITUTIONS

A. The emergency power system has been designed to the specified Generac Power Systems Modular Power System model SD3004803L2 electrical and physical characteristics. The automatic transfer switches equipment sizing, spacing, amounts, electrical wiring, ventilation equipment and components have all been sized and designed around Generac Power System's equipment. Should any substitutions be made, the supplier shall bear responsibility for the installation, coordination and operation of the system as well as any engineering and redesign costs which may result from substitutions

PART 3 – EXECUTION 3.1 APPLICATION FOR BAY AREA AIR QUALITY MANAGEMENT BOARD (BAAQMB)

OPERATING PERMITS

A. Generator supplier shall be responsible for applying and securing an operating permit from PERP and the Bay Area Air Quality Management Board (BAAQMB) to be approved for operation in the Bay Area as Trailer Diesel Generator.

3.2 TESTING

A. Proposed unit shall be manufactured under a prototype testing program in

conformance with NFPA 110 to provide quality assurance. Prototype tests shall be performed on separate equipment not to be supplied to this project.

B. Testing: Three separate series of tests shall be performed: Factory Prototype Model

Tests, Factory Production Model Test, and On-Site Tests.

1. Factory Prototype Tests: A certificate certifying that this prototype testing has been accomplished shall be submitted along with submittal data for



approval. These tests shall include: a. Maximum Power: All listed generator sets are guaranteed to meet or

exceed the specified rating. The published power output shall be achieved while running at normal operating temperature with all auxiliary equipment in place.

b. Maximum Motor Starting: The generator set shall be tested to

simulate motor starting by applying the rated kVA load at low lagging power factor (0.4 or lower). With this load applied, the generator shall recover to a minimum of 90% rated voltage.

c. Alternator Temperature Rise: The highest rated temperature rise (105

C) test to verify that worst case temperature rises do not exceed allowable NEMA MG1 limits for Class H insulation.

d. Torsional Analysis and Testing: The generator set shall be tested to

verify that the design is not subjected to harmful torsional stresses in excess of 5000 psi.

e. Cooling System: The cooling system shall be tested to determine

ambient temperature and static restriction capabilities. f. Durability: The generator set shall be subjected to a minimum 500

hour endurance test based on MIL-STD-705 to verify structural soundness and durability of the design.

g. Steady State Performance: The generator set shall be tested to verify

steady state operating performance within the specified maximum limits.

h. Transient Performance: The generator set shall be tested with the

standard alternator to verify single step loading capability as required by NFPA 110.

i. Harmonic Analysis: Per MIL-STD-705B, Method 601.4. j. The generator set shall be subjected to several single phase and three

phase faults to verify that the generator set can safely withstand the forces associated with the short circuit conditions.

k. The generator set shall be capable of producing full rated output at the

conclusion of the testing.

2. Factory Production Model Tests

a. Prior to leaving the manufacturing plant, the generator set shall be



subjected to a full load test at rated load and power factor 0.8 for a 2-hour period. Generator sets not factory tested at rated power factor will not be acceptable. Tests shall include run at full load, maximum power, voltage regulation, transient and steady state governing, single step load pick up and safety shutdowns. Certified test results shall be provided prior to shipment from the factory.

b. A certified test report shall be issued, confirming the results of this

testing. Copies of test specifications and all performance test data shall be included in project submittals.

3. Start-Up and Testing: The generator set manufacturer shall provide factory

trained personnel to perform the following field services except where noted:

a. Visual Inspection of Installation, including:

i. Generator set mounting, exhaust system, fuel system and cooling system

ii. System interconnection wiring and damage during shipment

b. Normal Checkout Procedures for All System Functions:

i. Verify Manual and Automatic Modes ii. Safeties and Alarms

c. On-Site Acceptance Test: The complete installation shall be tested

for compliance with the specification following completion of all site work. Testing shall be conducted by representatives of the manufacturer, with required fuel supplied by Contractor. The Engineer shall be notified in advance and shall have the option to witness the tests. Installation acceptance tests to be conducted on-site shall include a “cold start” test, a two-hour full load test, and a one step rated load pickup test in accordance with NFPA 110. Provide a resistive load bank and make temporary connections for full load test, if necessary.

d. Acceptance Test:

i. Demonstration of complete system operation for acceptance

testing by Factory Representative during initial on-site testing. This test shall be a witness test.

3.4 MANUFACTURER'S FIELD SERVICES

A. Prepare, start, test, and adjust systems as follows. B. Visual inspection of installation: generator mounting, skid mounted fuel tank, exhaust



system fuel system and cooling system; transfer switch and interconnection wiring. C. Check out procedures for system functions: safeties, alarms and load shed. D. On-site acceptance test: The complete installation shall be tested for compliance with

the specification following completion of all site work. Testing shall be conducted by representatives of the manufacturer, with required fuel supplied by Contractor. The Engineer shall be notified five days in advance and shall witness the tests. Installation acceptance tests to be conducted on-site shall include a “cold start” test, a four-hour full load test and testing with RTU/PLC control to show operation strategy has been implemented. Provide a resistive load bank and make temporary connections for full load test, if necessary. Simulate power failure, automatic starting and stopping during failure, second start under failure made to show all operations.

E. During test, record the following at 20-minute intervals:

2. Kilowatts. 3. Amperes. 4. Voltage. 5. Coolant temperature. 6. Room temperature. 7. Frequency. 8. Oil pressure.

F. Site Pressure Testing of Skid Mounted Fuel Tank

Primary tank sections shall be air pressurized at 15 psi and leak-checked to ensure integrity of tank weld seams per UL-142 standards and SFFD requirements. Containment basin shall be leak-checked by means of weld penetrate and ultraviolet light.

3.3 ADJUSTING

A. Adjust generator output voltage and engine speed.

3.4 TRAINING

A. Eight hours for installation assistance, inspection and certification of installation. B. Eight hours for functional and start-up testing C. Eight hours for two training sessions of 4 hours each shall be conducted by the

manufacturer representative for Port Of San Francisco personnel. Six copies of the O & M manuals shall be available during each training.

3.5 DEMONSTRATION



A. Provide systems demonstration of complete system operation for Port Of San

Francisco personnel. B. Describe loads connected to emergency system and restrictions for future load

additions. C. Simulate power outage by interrupting normal source, and demonstrate that system

operates to provide emergency power.

3.6 CLEANING A. Clean engine and generator surfaces. Replace oil and fuel filters.

END OF SECTION