92-646/647 ADDENDUM NO. 1

JUNE 28, 2017

UPGRADE OF THE INCIDENT MANAGEMENT SYSTEM

GREATER NEW HAVEN AREA

FEDERAL AID PROJECT NO(S). 0952(120) & 0952(121)

STATE PROJECT NOS. 92-646 & 92-647

TOWNS OF STRATFORD, MILFORD, ORANGE, WEST HAVEN,

NEW HAVEN, NORTH HAVEN, MIDDLETOWN, WALLINGFORD,

EAST HAVEN, BRANFORD & GUILFORD

ADDENDUM NO. 1

This Addendum addresses the following questions and answers contained on the “CT DOT

QUESTIONS AND ANSWERS WEBSITE FOR ADVERTISED CONSTRUCTION

PROJECTS”:

Question and Answer Nos. 1, 2, 3, & 4.

SPECIAL PROVISION

REVISED SPECIAL PROVISION

The following Special Provision is hereby deleted in its entirety and replaced with the attached

like-named Special Provision:

ITEM NO. 1015046A – CONCRETE COMMUNICATIONS SHELTER

CONTRACT ITEMS

REVISED CONTRACT ITEMS

ITEM NO.

1113604A

1113621A

DESCRIPTION

OPTICAL FIBERCABLE – SINGLE

MODE LOOSE BUFFER TUBE

CABLE, 6 FIBER

OPTICAL FIBERCABLE – SINGLE

MODE LOOSE BUFFER TUBE

CABLE, 72 FIBER

ORIGINAL

QUANTITY

30780 L.F.

1,047 L.F.

REVISED

QUANTITY

34067 L.F.

1,803 L.F.

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92-646/647 ADDENDUM NO. 1

PLANS

REVISED PLANS

The following Plan Sheets are hereby deleted and replaced with the like-numbered Plan Sheets:

SHEET NO. 02.01.A1

SHEET NO. 03.043.A1

SHEET NO. 03.111.A1

The Bid Proposal Form has been revised to reflect these changes.

The Detailed Estimate Sheets do not reflect these changes.

There will be no change in the number of calendar days due to this Addendum.

The foregoing is hereby made a part of the contract.

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ITEM #1015046A – CONCRETE COMMUNICATIONS SHELTER

DESCRIPTION:

This Item specifies the requirements for furnishing and installing an environmentally controlled

Concrete Communications Shelter and related concrete slab foundation upon which the

Communications Shelter shall be secured.

A. General

1. The Concrete Communications Shelter shall be installed on a concrete slab foundation south of I-95 in East Haven as shown on the project plans and as per

the manufacturer’s instructions.

2. The Concrete Shelter shall be equipped with conduit for future installation of land-line communications cable(s). All conduits shall be cast in-place. Install

within these conduits all required power cables and communications cables and

connect those cables to the equipment defined in this Specification Item and

shown on the Drawings. Install nylon pull tape in all conduits not being used.

Cap call conduits until used, at both ends.

3. The inside dimensions of the Concrete Equipment Shelter shall be minimum 28 feet long, 19 feet wide, and 9 feet high.

4. The shelter shall include an air conditioning pump system as specified further in this specification.

5. The shelter shall include four (4) sheet aluminum signs warning of high voltage. One sign shall be mounted in a visible location on each side of the shelter.

6. Supply and install equipment racks at locations shown on the drawings.

7. The Shelter shall be surrounded by an eight (8) foot high steel chain link fence, in accordance with Section 9.13 of the Standard Specifications. The fence shall have

steel barbed wire installed along the fence top perimeter. The fence shall be flat

black color. Included with the fence shall be a 15-foot wide gate for access to the

shelter, as shown on the plans. The gate shall include a locking connection system

to allow for secured padlocking of the gate. The padlock type and key shall be as

approved by the Engineer

8. The Shelter shall include a minimum of forty (40) six-foot tall emerald green arborvitaes or sufficient number to surround the fencing with a minimum 3-foot

spacing. Plant entirely around the fence except for the gate side and an area 5-feet

to either side of the service meter. The arborvitaes shall be furnished as part of

this item in accordance with Section 9.49.01, 9.49.02 and 9.49.03 of the Standard

Specifications.

9. The Shelter shall include a stone apron along the street for pull off of service vehicles from the entrance ramp to I-95 northbound lanes. The stone apron shall

be installed to the dimensions shown on the plans and shall be a minimum of 6-

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inch deep. The material shall be in accordance with the requirements of Article

M.02.01 Granular Fill, Broken or Crushed Stone.

10. The Shelter shall include a battery-backed UPS system.

11. A stand-by generator shall be installed to provide emergency power to the Communications Shelter. This generator shall be installed on a separate concrete

slab foundation at the location shown on the plans and per the manufacturer’s

requirements.

12. Provide a Programmable Logic Controller (PLC) based environmental monitoring system as shown on project plans. The unit shall be a TempElert Spectrum Model

EM1. Provide TempElert Spectrum EM1 modules, quantity as required, of

suitable types, required to integrate the numbers and types of signal points shown

on Project plan. Unit shall include a minimum of two (2) temperature probes.

Provide communications connections, as per manufacturer’s specifications, to

connect these TempElert modules to the same network. Ultimately, the

TempElert Spectrum EM1 shall network with an Ethernet network switch for

remote communication with the related server software operating at a computer in

the DOT Newington complex. The scope of supply includes any necessary

software licensing changes, and services of the technician(s) to configure and

integrate the monitored signal points to the supervisory control and data

acquisition (SCADA) software system, of the same manufacturer, in current use

for monitoring conditions of another data shelter.

13. Provide environmental sensors as shown on project plans: relative humidity Indicating transmitters (HIT), temperature indicating transmitters (TIT), high

temperature switches (TSH), smoke detectors and heat detectors, door contact set

(DS), and motion detectors (MD). Provide sensing power sources, and

appurtenances, with the instruments for integration with the TempElert Spectrum

EM1 unit(s).

a. The smoke detectors and heat detectors shall be UL listed detectors used in fire-alarm system, which provide contact closure on/off status as

annunciating signals. The set points shall be fixed as listed by UL for use

as life safety devices.

b. The high temperature switches shall be switches with on/off status contact set, rated minimum 120V/5A, with user adjustable set points between 40

and 90 degrees Fahrenheit. The temperature switches shall be tentatively

set to trip at 60 degrees Fahrenheit.

c. The indicating transmitters shall be transmitters with 4 to 20mA analog output signals, representing a continuous 0% to 100% of the

measurements. The instruments shall be indicating: equipped with LCD

display showing a readout of the measurement, in related engineering unit.

i. The relative humidity indicating transmitters shall measure relative humidity between 0% to 100% relative humidity of ambient air.

ii. The temperature indicating transmitters shall measure between 20 to 100 degrees Fahrenheit ambient temperature. One of the

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temperature indicating transmitters shall be based on 100-Ohm

RTD temperature sensor, to be used above the middle rack row.

The other temperature indicating transmitters shall be based on

thermocouple temperature sensors.

d. The door contact set shall consist of a piece of magnet, and a switch which closes when in close proximity of the magnet piece.

e. The motion detectors shall be of PIR (passive-infrared) design with a sensing range of up to 30 feet, providing on/off status of presence

detection.

B. Applicable Publications, Codes and Standards:

1. Publications, codes and standards below form a part of these Specifications to the extent referenced. All elements of the Concrete Communications Shelter shall be

fully compliant with the most recent version of the following:

a. Uniform Building Code (UBC)

b. Building Officials and Code Administrators (BOCA)

c. American Concrete Institute (ACI)

d. American National Standard Institute (ANSI)

i. ANSI/ASME A117.1, A117.3 Standard for Accessible and Usable Building and Facilities

e. The Americans with Disabilities Act (ADA)

f. American Standard Testing Methodology (ASTM)

i. ASTM A 120; Specification for Pipe, Steel, Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless, for Ordinary

Uses

ii. ASTM A 126; Specification for Gray Iron Castings for Valves, Flanges and Pipe Fittings

iii. ASTM D 396; Specification for Fuel Oils

iv. ASTM E1745-11: Standard Specification for Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill Under

Concrete Slabs

g. National Fire Protection Association (NFPA)

i. NFPA 37: Stationary Combustion Engines and Gas Turbines.

ii. NFPA 70: National Electrical Code. (NEC) iii. NFPA 72 – National Fire Alarm Code iv. NFPA 90A – Standard for the Installation of Air conditioning and

Ventilating Systems

v. NFPA 101 – Life Safety Code vi. NFPA 110: Emergency and Standby Power Systems

h. International Fire Code (IFC)

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i. Institute of Electrical and Electronics Engineers (IEEE) Standard 446; Recommended Practice for Emergency and Standby Power Systems

j. National Electric Manufacturer's Association (NEMA)

i. NEMA MG 1 - Motors and Generators ii. NEMA ICS 2 - Industrial Control and Systems - Controllers,

Contactors and Overload Relays.

iii. NEMA 250 85, Enclosures for Electrical Equipment iv. NEMA ICS 6 - Industrial Control and Systems - Enclosures

k. National Electrical Code (NEC)

l. Underwriters Laboratories (UL)

i. UL 508, Standards for Safety, Industrial Control Equipment ii. UL 864 – Control Units and Accessories for Fire Alarm Systems iii. UL 1008: Automatic Transfer Switches iv. UL 1778 – Uninterruptible Power Supplies v. UL 142 - Above Ground Tanks for Flammable and Combustible

Liquids

m. DIN (Deutsche Industrie-Norm), VDE 0611, Specification for modular terminal blocks for connection of copper conductors up to 1,000V ac and

up to 1,200V dc

n. All applicable State of Connecticut Building Codes

o. All applicable Town of East Haven Building Codes

p. All applicable Interstate Highway System Rules and Regulations

2. Products for, and the execution of, the work of this item shall satisfy the applicable requirements of the latest NEC Codes and Regulations of Jurisdictional

Authorities, and the Occupational Safety and Health Act. Products shall satisfy

the applicable requirements of ANSI, NEMA, UL, and ASTM.

3. Provide products that are listed and labeled by Underwriters Laboratory, approved by Factory Mutual, or certified as meeting the standards of UL by the Electrical

Testing Laboratory (ETL) unless products meeting the requirements of these

testing laboratories are not readily available or unless standards do not exist for

the products. Provide products that are for the location installed and listed and

labeled or approved as indicated and specified for the short circuit currents,

voltages, and currents applied and listed and labeled or approved for the

applications the items are intended.

4. Perform all electrical work under the supervision of a licensed electrician.

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MATERIALS:

A. General:

1. All furnished materials shall be new, of current manufacture, high grade and free from all defects and shall not have been in prior service except as required during

factory testing.

2. Furnish all items of the materials, design, sizes and ratings shown on the Drawings and herein specified.

3. Furnish materials and equipment bearing evidence of UL listing where UL standards exist and manufacturer identification and customary size or rating data.

4. Provide products that are free from defects impairing performance, durability, or appearance, and of the commercial quality best suited for the purpose shown on

the Drawings or specified herein.

5. Only key components are explicitly specified below. Provide all appurtenances necessary to complete the installations. Provide Products such as sealants, grouts,

fasteners, conduit, wireways, wire and connectors, cable, support devices, and

similar devices, as required for Work of this item.

B. Concrete Equipment Shelter Structural Requirements

1. The Shelter shall meet all applicable state and local codes, whichever is more stringent. The Concrete Shelter shall be a pre-fabricated unit with vandal proof

door, concrete slab flooring, power distribution panel, conduits, video

surveillance camera, fencing, air conditioning, high voltage warning signs,

interior and exterior lighting, storage cabinet and landscaping

2. Building Structure

a. The Building structure shall meet the following material and design criteria:

i. Wind load: 150 MPH ii. Snow Load: 80 PSF and state building code requirements iii. Floor load: 250 PSF iv. Seismic: Local Requirements v. Insulation: R-13 (base), R-13 (walls); R-13 (ceiling)

b. The Shelter shall be able to withstand a wind loading of 150 mph without damage.

c. The exterior of the shelter shall be a brick façade appearance or equal as approved by the Engineer. The brick shall be a typical dull red brick color

in appearance.

d. The Shelter shall be secured to the concrete slab. The concrete slab shall be made of class A concrete. The slab shall meet the Form 816

requirements for materials and installation. The slab shall include conduit

embedded in the ground as shown on project plans.

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e. The shelter shall be equipped with openings at opposite sides of the shelter, one as opening for exhaust air; the other as opening for make-up

air, as specified further in this document. Except for the exhaust openings,

the shelter shall not have any windows.

3. Flat Panel Roof

a. The roof shall be a flat panel of reinforced concrete, minimum 4” thick, with a l/8 in/ft pitch for drainage. The roof shall permit the drainage of

water to eliminate standing water on the roof.

b. Reinforcement shall consist of No. 4 rebar and shall meet the requirements of Article M.06.01 of the Standard Specifications.

c. The roof panels shall be designed to support all the interior ceiling-hung equipment as identified on the contract plans, Contractor Working

Drawings, and within this Special Provision.

d. The roof panels of the equipment shelter shall resist penetration from falling objects such as a block of ice weighing up to 100 pounds dropped

from a height of 200 feet based on Ballistics Research Laboratory

calculations.

4. Flat Panel Walls

a. The walls shall be flat panels of reinforced concrete.

b. Reinforcement shall consist of No. 4 rebar.

c. Door frames shall be cast into the concrete wall panels for security and to prevent water leakage around the frames.

5. Waffle Panel Floor.

a. The floor shall be 6 in. deep waffle slab of reinforced concrete. The waffling shall be formed by longitudinal ribs, and transverse ribs.

Reinforcement shall consist of No. 6 rebar through each rib and around the

edges of the panel.

b. The floor deck shall be reinforced with WWF. The perimeter of the floor shall be reinforced with a steel angle to eliminate damage caused from

transportation stresses or during installation of the building on the

foundation.

6. Panel Connections

a. Steel panel connection plates shall be cast into the roof, wall, and floor panels and welded together after assembly and panel alignment.

7. Moisture Protection

a. Shelter shall be fabricated using solid, one-piece panels, with no expansion joints.

b. All joints between panels (wall-to-ceiling, wall-to-wall, wall-to-floor) shall be sealed with a permanent weather seal as recommended by the

shelter manufacturer to provide additional moisture protection.

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c. Provide under-slab vapor barrier meeting the following requirements:

i. Maintain permeance of less than 0.01 Perms/sf/hr, as tested in accordance with mandatory conditioning tests per ASTM E1745.

ii. Strength: ASTM E1745 Class A iii. Thickness: 15 mils, minimum iv. Provide third party documentation that all testing was performed

on a single roll per ASTM E1745

8. Shelter Door

a. The shelter door shall be a locked vandal-proof door, minimum 48 inches wide. The door shall not have any window.

b. The door shall be equipped with a steel plate covering the door bolt to impede attempt to pry the lock open.

c. The door shall be painted brown. The door paint shall be baked to prevent peeling.

d. The door shall be equipped with a door switch mounted at the top edge, opposite the hinged side. Provide cabling to connect the door switch to

the related intrusion alarm panel.

C. Electrical System Requirements

1. Provide the electrical system that includes the items listed below, and as per project plans:

a. One internal grounding system as shown on the project plans. b. One 200 Amp three-phase electrical service from the local power mains. c. A 200-Amp/3-Pole 208V automatic transfer switch, with un-switched

neutral that switches power from either utility or generator.

d. A UPS (un-interruptible power system), 208V/3Phase/4Wire, 30KW capacity, with battery set sized to provide power for minimum 15 minutes

at 20KW loading level.

e. Power surge arrester system. The surge arrester system shall include a surge hit counter, and replaceable surge suppressor modules installed on

permanent bases.

f. One load center with a 200 ampere main breaker and circuit breakers. Provide a meter socket at the location shown on the plans. The meter

socket shall be as approved by Unlimited Illuminating Company (UIC) for

this type of installation. The costs relating to the installation of the meter

socket and associated service connection shall be included with the

shelter.

g. One 125-Amp three-phase load center with circuit breakers, fed from the UPS.

h. Branch load cables to devices as per related panel schedules shown on project plans.

i. One LED type exterior light, minimum 12,500 lumen light output, controlled by a day-light sensor capable of switching a 120V/2A load.

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j. 4-foot LED light fixtures and bulbs with lens covers, minimum 3500 lumen light output each, in conventional 40-watt fluorescent-tube form

factor as shown on project plans. Provide wall switch for the control of

the fixtures, in the form of a timer with a rotary dial, located next the entry

door. The timer shall be adjustable between 0 and 90 minutes. The

Shelter lighting shall meet all local and state codes whichever is more

stringent.

k. 120-Volt/20-Amp Duplex receptacles, located at four foot intervals on the interior walls 18” AFF, and in accordance with local, state, and national

codes.

l. An emergency lighting fixture, and illuminated exit sign, powered from the electric distribution panel, backed by a battery set in the same

enclosure.

m. Provide 120V/20A power feed, from dedicated breaker in the distribution panel for critical loads, to each cabinet. Provide required power feeds

above the equipment cabinet where the main network switch will be

installed item 1108660A. The power feeds shall be terminated at NEMA

L5-20 receptacles, in individual 4”x4” steel outlet boxed, which shall be

attached to the ceiling of cable tray and positioned above the equipment

cabinets

D. Automatic Transfer Switch

1. Furnish all items of the materials, design, sizes and ratings shown on the Drawings and herein specified.

2. Furnish materials and equipment bearing evidence of UL listing where UL standards exist and manufacturer identification and customary size or rating data.

3. Provide products that are free from defects impairing performance, durability, or appearance, and of the commercial quality best suited for the purpose shown on

the Drawings or specified herein.

4. 208/120 volts, three-phase, four-wire, 60 Hertz, grounded wye system voltage. All components in the system shall have adequate capacity, capability and bracing

for the fault current indicated on the Drawings. The transfer switch shall comply

with local Utility Company requirements.

5. Automatic transfer switch shall be manufactured by Cummins Power Systems model OTPC, 225A/3Pole/4Wire, solid neutral, 120/208VAC automatic transfer

switch in NEMA1 rated steel enclosure. The ATS shall be equipped with Digital

controller, Programmable engine exerciser, and main shaft auxiliary contacts.

The controller shall be compatible, or fitted with appurtenant interface, with

Cummins PowerCommand 500/550 remote monitoring gateway device.

6. Provide automatic transfer switches rated for continuous duty in an unventilated NEMA 1 sheet metal enclosure. Enclosure shall be UL listed. The cabinet door

shall be key-locking. Controls on cabinet door shall be key-operated. The

cabinet shall provide required wire bend space at point of entry as shown on the

drawings. Manual operating handles and all control switches (other than

key-operated switches) shall be accessible to authorized personnel only by

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opening the key-locking cabinet door. Transfer switches with manual operating

handles or non-key-operated control switches located on outside of cabinet do not

meet this specification and are not acceptable.

7. All poles of transfer switch shall be mechanically held in both normal and emergency positions. All switches shall be double throw having electrically

operated normal-emergency positions, inherently interlocked both mechanically

and electrically so that all main contacts move simultaneously on the same shaft,

without the utilization of multiple snap-action devices.

8. The electrical operator shall be a single mechanism, comprised of a minimum number of operating parts. A service handle designed for one hand operation

shall be provided for manual service operation. All main contacts shall be silver

alloy wiping action type and be protected by separately removal arching contacts.

Transfer switches with main and/or arcing contacts that weld in the event of a

fault current as indicated by UL or independent test lab reports will not be

acceptable. Main contacts shall transfer in 1/6 of a second or less.

9. All switch and relay contacts, coils, springs and control elements shall be conveniently removable from the front of the transfer switch without use of

special tools, or removal of the switch panels from the enclosure and without

major disassembly or disconnection of drive linkages or power conductors.

Sensing and control relays shall be continuous duty industrial control type with

minimum contact rating of 10 amps. Sensing relays shall operate without contact

chatter or false response when voltage is slowly varied to drop out and pick up

levels.

10. The continuous duty rating of the automatic transfer switch shall be capable of handling all classes of loads on a make, carry and break basis per UL 1008.

Certified test data shall be available to verify that a withstand test has been

conducted in accordance with UL-1008, Sections 25 and 26. The switch must be

capable of surviving in operable condition the maximum short circuit fault current

available at the load side of the overcurrent device indicated on the Drawings.

11. The transfer switches shall be specifically designed for 4 pole application. Transfer switches utilizing adapted devices such as molded case circuit breakers,

or circuit breaker parts, disconnect switches, etc., which have not been intended to

repeatedly open and close load currents are not acceptable. UL approval on

individual power switch devices alone is not sufficient. Transfer switches shall be

provided with a switched neutral pole. The neutral pole shall be of the same

construction and have the same ratings as the phase poles. All poles shall be

switched simultaneously using a common crossbar.

12. The transfer switch shall obtain its operating voltage from the source to which it will transfer.

13. Failure of any coil or disarrangement of any part shall not permit the transfer switch to assume a neutral position.

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14. Operation: The automatic transfer switch control panel shall utilize solid-state sensing on normal and emergency for automatic, positive operation. The

following shall be provided:

a. All phases of the normal source voltage shall be monitored line-to-line. Close differential voltage sensing shall be provided on all phases. The

pickup voltage shall be adjustable from 85% to 100% of nominal and the

dropout voltage shall be adjustable from 75% to 98% of the pickup value.

The transfer to emergency will be initiated upon reduction of normal

source to 85% of nominal voltage and retransfer to normal shall occur

when normal source returns to 90% of nominal.

b. A time delay to override momentary normal source outages to delay all transfer switch and engine starting signals. The time delay shall be field

adjustable from 0.5 to 6 seconds and factory set at 1 second.

c. A time delay on retransfer to normal source. The time delay shall be automatically bypassed if the emergency source fails and normal source is

available. The time delay shall be field adjustable from 0 to 30 minutes

and factory set at 30 minutes.

d. An unloaded running time delay for emergency generator cool down. The time delay shall be field adjustable from 0 to 5 minutes and factory set at 5

minutes.

e. A time delay on transfer to emergency. Initially set at zero but field adjustable up to 1 minute for controlled timing of load transfer to

emergency.

f. Independent single phase voltage and frequency sensing of the emergency source. The pickup voltage shall be adjustable from 85% to 100% of

nominal. Pickup frequency shall be adjustable from 90% to 100% of

nominal. Transfer to emergency upon normal source failure when

emergency source voltage is 90% or more of nominal and frequency is

95% or more of nominal.

15. Communication Interface – Provide appurtenant electronic interface module with the generator controller for interfacing the generator controller with a remote

monitoring gateway via RS485 serial communication.

16. Auxiliary Contacts, Indicating Lights, and Control Switches – The following shall be provided:

a. A contact that closes when normal source fails for initiating engine starting, rated 10 amps, 32VDC. Contacts to be gold plated for low

voltage service.

b. A contact that opens when normal source fails for initiating engine starting, rated 10 amps, 32VDC. Contacts to be gold plated for low

voltage service.

c. Two auxiliary contacts that are closed when automatic transfer switch is connected to normal source and two auxiliary contacts that are closed

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when automatic transfer switch is connected to emergency source. Rated

10 amps, 480 VAC.

d. One auxiliary contact that is closed when normal source is available and one auxiliary contact that is closed when emergency source is available.

Rated 10 amps, 480 VAC.

e. A green signal light to indicate when the automatic transfer switch is connected to the normal source. A red signal light to indicate when the

automatic transfer switch is connected to the emergency source.

f. A white signal light to indicate when the normal source is available. A white signal light to indicate when the emergency source is available.

g. A test switch to momentarily simulate normal source failure.

h. A key-operated switch with standby and normal positions to manually switch between the standby and normal source.

i. A solid state exerciser clock to set the day, time, and duration of generator set exercise/test period. A with/without load selector switch for the

exercise period.

17. Transfer switches shall be equipped with a field adjustable controls to allow the operator to control the transfer switch operating time during switching in both

directions. The controls shall control the time the load is isolated from both

power sources, to allow load residual voltage to decay before closure to the

opposite source. The transfer switch operating speed control feature shall have an

adjustable range of 0 to 7.5 seconds.

18. Provide each automatic transfer switch with a separately provided safety rubber mat having dielectric strength of 30,000 volts, as tested under strict requirements

of ASTM D178 regulations to :

a. Ensure personnel safety against 8,000 volts to ground.

b. To be a minimum 1/4-inch thick and 36 inches wide.

c. To extend in continuous fashion for the full length of the automatic transfer switch assembly. Multiple mats are not to be accepted.

d. To be black in color.

19. Undercoating – Undercoat the underside of each enclosure coating all surfaces that contact the floor thoroughly with a rust and corrosion resistant mastic

conforming to the manufacturer's standards, minimum 4 mils thick.

20. Supporting Steel – Provide all steel floor channels and epoxy resin filler necessary and required for the installation of each automatic transfer switch. Install steel

floor channels flush with top of concrete pad

E. Uninterrupted Power Supply (UPS)

1. The UPS (uninterruptible power supply systems) shall provide high-quality AC power for sensitive electronic equipment loads.

2. The UPS shall be UL or ETL Listed per UL Standard 1778.

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3. The UPS shall be manufactured by Eaton and shall be 9355 series.

4. Select a manufacturer who has been engaged in production of similar UPS Systems for a minimum of ten years. The system shall be designed and

manufactured according to world class quality standards. The manufacturer shall

be ISO 9001 certified.

5. All materials of the UPS shall be new, of current manufacture, high grade and free from all defects and shall not have been in prior service except as required during

factory testing.

6. The maximum working voltage, current, and di/dt of all solid-state power components and electronic devices shall not exceed 75% of the ratings established

by their manufacturer. The operating temperature of solid-state component sub-

assembly shall not be greater than 75% of their ratings. Electrolytic capacitors

shall be computer grade and be operated at no more than 95% of their voltage

rating at the maximum rectifier charging voltage.

7. The UPS shall be constructed of replaceable subassemblies. All active electronic devices shall be solid-state.

8. Wiring:

a. Wiring practices, materials and coding shall be in accordance with the requirements of the National Electrical Code (NFPA 70). All bolted

connections of bus bars, lugs, and cables shall be in accordance with

requirements of the National Electrical Code and other applicable

standards. All electrical power connections are to be torqued to the

required value and marked with a visual indicator.

b. Provision shall be made for power cables to enter or leave from the top or bottom of the UPS cabinet. Neutral wire connection for power input shall

be provided.

c. Provide RS232 Communication Interface with a 9-pin sub-D connector for communicating with manufacture-supplied software package.

d. The UPS shall provide two communication slots in the back of the enclosure allowing for additional connectivity options, including

SNMP/Web, AS/400 relays, Modbus/Jbus capabilities. In one of the two

communications slot provide an interface module which provides TCP/IP

(Ethernet) communication interface via an RJ45 connector with a built in

web browser. In the second communications slot provide an interface

module which provides relay (contact closure) outputs for UPS status.

9. The UPS unit shall be comprised of an input rectifier, battery charger, inverter, bypass, and battery consisting of the appropriate number of sealed battery

modules, and any applicable output transformer, shall be housed in a single

freestanding NEMA type 1 enclosure. Cabinet doors/covers shall require a tool

for gaining access. Casters and stops shall be provided for ease of installation.

Front access only shall be required for expedient servicing, adjustments, and

installation. The UPS cabinet shall be structurally adequate and have provisions

for hoisting, jacking, and forklift handling.

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10. The UPS shall be constructed of replaceable subassemblies. Printed circuit assemblies shall be plug connections. Like assemblies and like components shall

be interchangeable.

11. The UPS cabinet shall be cleaned, primed, and painted with the manufacturer's standard color. Casters and leveling feet shall be provided as standard.

12. Cooling of the UPS shall be by forced air. Low-velocity fans shall be used to minimize audible noise output. Fan power shall be provided by the UPS output.

The thermal design, along with all thermal and ambient sensors, shall be

coordinated with the protective devices before excessive component or internal

cabinet temperatures are exceeded.

13. The AC output neutral shall be electrically isolated from the UPS chassis. The UPS chassis shall have an equipment ground terminal. Provisions for local

bonding shall be provided.

14. Modes of Operation: The UPS shall be designed to operate as an on-line reverse transfer system in the following modes:

a. Normal. The critical AC load is continuously supplied by the UPS inverter. The rectifier/charger derives power from a utility AC source and

supplies DC power to the inverter while simultaneously float-charging a

power reserve battery.

b. Emergency. Upon failure of utility AC power, the critical AC load is supplied by the inverter, which without any switching, obtains power from

the battery. There shall be no interruption in power to the critical load

upon failure or restoration of the utility AC source.

c. Recharge. Upon restoration of utility AC power, after a utility AC power outage, the rectifier/charge shall automatically restart, walk-in, and

gradually assume the inverter and battery recharge loads.

d. Bypass. If the UPS must be taken out of service for maintenance or repair, or should the inverter overload capacity be exceeded, the static transfer

switch shall perform a reverse transfer of the load from the inverter to the

bypass source with no interruption in power to the critical AC load.

e. Maintenance Bypass. The maintenance bypass shall be used for supplying the power feed directly from the utility supply, while the UPS is isolated

for maintenance or repair.

15. System Ratings:

a. UPS Unit

i. Input: 208Y/120 volts, three-phase, 4-wire, plus-ground.

ii. Output: 208Y/120 volts, three-phase, 4-wire, plus-ground.

iii. Output Load Capacity: 30 KVA.

b. Battery Plant

i. Battery Cells: Sealed, lead-acid, maintenance-free.

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ii. Reserve Time:

Minimum 15 minutes at 20KVA load at 0.8 power factor,

with ambient temperature between +20and +30 degrees

Centigrade

Recharge Time: Maximum ten times discharge time to 95 percent capacity

iii. Recharge Time: Maximum ten times discharge time to 95 percent capacity.

c. Seismic Performance

i. The equipment and major components shall be suitable for and certified to meet all applicable seismic requirements of the

California Building Code zone 4 application

16. Performance Requirements:

a. AC Input to UPS:

i. Voltage Configuration: three-phase, 4-wire plus ground

ii. Voltage Range: +10%, -15% of nominal

iii. Frequency: -15Hz to +5Hz of Nominal frequency

iv. Power Factor: Up to 0.96 lagging at nominal input voltage and full rated UPS output load with input filter

v. Inrush current: 800% of full load current maximum

vi. Current Limit: 115% of nominal AC input current maximum. 100% of nominal for optional generator operation

vii. Input Current Walk-In: 15 seconds to full rated input current maximum. Field selectable 5 through 15 seconds

viii. Current Distortion: 5% reflected THD maximum at full load with input filter

ix. Current Distortion: 5% reflected THD maximum at full load with input filter Current Distortion: 5% reflected THD maximum at

full load with input filter

b. AC Output, UPS Inverter:

i. Voltage Configuration: three-phase, 4-wire plus ground

ii. Voltage Regulation: ± 2% three-phase RMS average for a balanced three-phase load for the combined variation effects of

input voltage, connected load, battery voltage, ambient

temperature, and load power factor

iii. Frequency: Nominal frequency 60 Hz, +/-1Hz

iv. Frequency Slew Rate: 3 Hz per second maximum

v. Phase Displacement:

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± 0.5 degree for balanced load

± 1.0 degrees for 100% unbalanced load

vi. Bypass Line Sync Range:

± 0.5 Hertz

Field selectable ± 0.5 to 5.0 Hz

vii. Voltage Distortion:

1% total harmonic distortion (THD) for linear loads

Maximum 2% Total Harmonic Distortion (THD), phase to neutral, and maximum 5% THD, phase to phase, into a

maximum rated linear load

Maximum 5% THD, phase to neutral, and maximum 7% THD, phase to phase, into a maximum rated non-linear

load

viii. Load Power Factor Range: 1.0 to 0.7 lagging without derating

ix. Output Power Rating: Rated kVA at 0.9 lagging power factor

x. Overload Capability:

125% for ten minutes (without bypass source)

125% for ten minutes (without bypass source)

200% for 10 cycles, pulse paralleling with the static switch

xi. Inverter Output Voltage Adjustment: +/-5% manual adjustment

xii. Voltage Transient Response:

100% load step: ± 2.5%

Loss or return of AC input power: ± 1.0%

Loss or return of AC input power: ± 1.0%

xiii. Transient Recovery Time: To within 1% of output voltage within one cycle

xiv. Voltage Unbalance: 100% unbalanced load: ± 1%

xv. Fault Clearing: Sub-cycle current of at least 300%

xvi. Efficiency: greater than 91% in normal mode, with nominal line conditions

17. Environmental Ratings:

a. Ambient Temperature Ranges:

i. UPS: 0 to +40 degrees Centigrade

ii. Battery: 15 to 25 degrees Centigrade

b. Relative Humidity: 0 to 95 percent, non-condensing

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c. Audible Noise: Noise generated by the UPS under any condition of normal operation shall not exceed a sound pressure level of 65 dBA

measured at 1 meter from the surface of the UPS.

18. Components

a. Input Transformer:

i. When required, the input transformer shall be factory installed inside the UPS module cabinet without increasing the standard

footprint.

b. Rectifier/Charger:

i. The term rectifier/charger shall denote the solid-state equipment and controls necessary to convert incoming AC power to

regulated DC power for input to the inverter and for battery

charging. The rectifier/charger shall be a phase-controlled, solid-

state SCR type with constant voltage/current limiting control

circuitry.

ii. AC Input Current Limiting: The rectifier/charger unit shall be provided with AC input current limiting whereby the maximum

input current shall be limited to 115% of the full input current

rating. The rectifier/charger shall operate at a reduced current

limit mode whenever the critical load is powered from the UPS

static bypass circuit such that the maximum UPS input current

will not exceed 115% of full load input current. In addition, the

rectifier/charger shall have a separate battery current limit,

adjustable from 0 to 15% of the full load input current. An

optional second circuit shall limit the battery recharge current to

zero when activated by a customer-supplied contact closure to

signal a customer function such as generator operation.

iii. Input Current Walk-In: The rectifier/charger shall contain a timed walk-in circuit that causes the unit to gradually assume the load

over a 15-second time interval after input voltage is applied.

Walk-in time shall be field selectable for 5 through 20 seconds.

iv. Fuse Failure Protection: Power semiconductors in the rectifier/charger shall be fused with fast-acting fuses, so that loss

of any one power semiconductor shall not cause cascading

failures.

v. DC Filter: The rectifier/charger shall have an output filter to minimize ripple voltage into the battery. Under no conditions

shall ripple voltage into the battery exceed 1% RMS. The filter

shall be adequate to insure that the DC output of the

rectifier/charger will meet the input requirements of the inverter.

The inverter shall be able to operate from the rectifier/charger

with the battery disconnected.

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vi. Automatic Rectifier Restart: Upon restoration of utility AC power, after a utility AC power outage and prior to a UPS

automatic end-of-discharge shutdown, the rectifier/charger shall

automatically restart, walk-in, and gradually assume the inverter

and battery recharge loads.

vii. Battery Recharge: In addition to supplying power for the inverter load, the rectifier/charger shall be capable of producing battery

charging current sufficient to replace 95% of the battery discharge

power within ten (10) times the discharge time. After the battery

is recharged, the rectifier/charger shall maintain the battery at full

charge until the next emergency operation.

viii. Overvoltage Protection: There shall be DC over-voltage protection so that if the DC voltage rises to the pre-set limit, the

UPS is to shut down automatically and initiate an uninterrupted

load transfer to the static bypass line.

c. Inverter:

i. The term inverter shall denote the solid-state equipment and controls to convert DC power from the rectifier/charger or battery

to regulated AC power for supporting the critical load. The

inverter shall use Insulated Gate Bipolar Transistors (IGBTs) in a

phase-controlled, pulse width modulated (PWM) design capable

of providing the specified AC output.

ii. Overload Capability: The inverter shall be capable of supplying current and voltage for overloads exceeding 100% and up to

200% of full load current. A status indicator and audible alarm

shall indicate overload operation. The UPS shall transfer the load

to bypass when overload capacity is exceeded.

iii. Fault clearing and Current Limit: The inverter shall be capable of supplying an overload current of 150% of its full-load rating for

one minute. For greater currents or longer time duration, the

inverter shall have electronic current-limiting protection to

prevent damage to components. The critical load will be

transferred to the static bypass automatically and uninterrupted.

The inverter shall be self-protecting against any magnitude of

connected output overload. Inverter control logic shall sense and

disconnect the inverter from the critical AC load without the

requirement to clear protective fuses.

iv. Step Load Response: The output voltage shall be maintained to within ± 2.5% with a 0-to-100% step load change or a 100%-to-0

step load change. The output voltage shall recover to within 1%

of nominal voltage within 1 cycle.

v. Voltage Distortion: For linear loads, the output voltage total harmonic distortion (THD) shall not be greater than 1%. For

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100% rated load of 3:1 crest factor nonlinear loads, the output

voltage total harmonic distortion shall not be greater than 2.5%.

The output rating is not to be derated in kVA nor kW due to the

100% nonlinear load with 3:1 crest factor.

vi. Output Power Transformer: A dry-type power transformer shall be provided for the inverter AC output. It shall have copper

wiring exclusively. The transformers hottest spot winding

temperature shall not exceed the temperature limit of the

transformer insulation class of material when operating at full

load at maximum ambient temperature.

vii. Phase Balance: Electronic controls shall be provided to regulate each phase so that an unbalanced loading will not cause the output

voltage to go outside the specified voltage unbalance or phase

displacement. With 100% load on one phase and 0% load on the

other 2 phases or 100% load on 2 phases and 0% load on the other

phase, the voltage balance is to be within 1% and the phase

displacement is to be 120 degrees within ±1 degree.

viii. Fuse Failure Protection: Power semiconductors in the inverter unit shall be fused with fast-acting fuses, so that loss of any one

power semiconductor will not cause cascading failures.

ix. Inverter Shutdown: For rapid removal of the inverter from the critical load, the inverter control electronics shall instantaneously

turn off the inverter transistors. Simultaneously, the static transfer

switch shall be turned on to maintain continuous power to the

critical load.

x. Inverter DC Protection: The inverter shall be protected by the following disconnect levels:

DC Overvoltage Shutdown

DC Undervoltage Warning (Low Battery Reserve), user adjustable from 1 to 99 minutes

DC Undervoltage Shutdown (End of Discharge)

xi. Over-discharge Protection: To prevent battery damage from over-discharging, the UPS control logic shall automatically raise the

shutdown voltage set point as discharge time increases beyond

fifteen (15) minutes

xii. Inverter Output Voltage Adjustment: The inverter shall use a software control to adjust the output voltage from +/- 5% of the

nominal value

xiii. Output Frequency: The output frequency of the inverter shall be controlled by an oscillator. The oscillator shall be temperature

compensated and hold the inverter output frequency to +/- 0.1%

for steady state and transient conditions. Drift shall not exceed

0.1% during a 24-hour period. Total frequency deviation,

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including short time fluctuations and drift, shall not exceed 0.1%

from the rated frequency

d. Display and Controls:

i. The UPS shall be provided with a microprocessor based unit status display and controls designed for convenient and reliable user

operation. A graphical display shall be used to show a single-line

diagram of the UPS, and shall be provided as part of the

monitoring and controls specifications of the UPS. All of the

operator controls and monitors shall be located on the front of the

UPS cabinet. The monitoring functions such as metering, status

and alarms shall be displayed on the graphical LCD display.

Additional features of the monitoring system shall include:

Menu-driven display with pushbutton navigation

Real time clock (time and date)

Alarm history with time and date stamp

Battery backed-up memory

ii. Metering: The following parameters shall be displayed:

Input AC voltage line-to-line

Input AC current for each phase

Input frequency

Battery voltage

Battery charge/discharge current

Output AC voltage line-to-line and line-to-neutral for each phase

Output AC current for each phase

Output AC current for each phase

Percent of rated load being supplied by the UPS

Battery time left during battery operation

iii. Alarm Messages: The following alarm messages shall be displayed. An audible alarm shall be provided and activated by

any of the alarm conditions:

Input Line Fault

Input Phase Rotation Error

Input Over/Under Frequency

Input Current Limit

Rectifier Fail

Battery Test Failed

Battery Low Warning (Adjustable 1 To 99 Minutes)

Battery Low Transfer

DC Overvoltage Steady State

Bypass Frequency Error

Load On Bypass

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Excessive Auto Retransfers

SBS SCR Shorted

Bypass Sync Error

Input Phase Loss

I DC Peak

Output Undervoltage Transfer

Output Overvoltage Transfer

Inverter Overload

SBS Overload

Inverter Overload Transfer

Transfer Failed Shutdown

Hardware Shutdown

Output Power Supply Fail

Inverter Control Fault Transfer

EPO Latched (remote EPO activated

iv. Status Messages: The following UPS status messages shall be displayed

Normal operation

On SBS

Load on UPS

Load on bypass

User Shutdown

Battery Discharging

v. Controls: UPS start-up, shutdown, and bypass operations shall be accomplished through the front-panel pushbutton controls. Menu-

driven user prompts shall be provided to guide the operator

through system operation without the use of additional manuals.

Pushbuttons shall be provided to display the status of the UPS and

to test and reset visual and audible alarms. A mimic screen shall

be available on the LCD screen to depict a single-line diagram of

the UPS, with switch positions and power flow.

vi. On-Line Battery Test: The UPS shall be provided with a menu-driven On-Line Battery Test feature. The test shall ensure the

capability of the battery to supply power to the inverter while the

load is supplied power in the normal mode. If the battery fails the

test, the system shall automatically do the following:

Maintain the load through the UPS.

Display a warning message.

Sound an audible alarm

The battery test feature shall have the following user selectable

options:

Interval between tests (2 to 9 weeks).

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Date and time of initial test.

Enable/disable test

e. Static Transfer Switch:

i. A static transfer switch and bypass circuit shall be provided as an integral part of the UPS. The static switch shall be a naturally

commutated high-speed static (SCR-type) device rated to conduct

full load current continuously. The switch shall have an overload

rating of 110% rated load continuously, 200% rated load for five

seconds. The static transfer switch shall also have fault-clearing

capabilities of 1100 amperes for 1 second, 3000 amperes for 10

cycles, and 6000 amperes peak for the first half cycle.

ii. The static transfer switch control logic shall contain an automatic transfer control circuit that senses the status of the inverter logic

signals, and operating and alarm conditions. This control circuit

shall provide an uninterrupted transfer of the load to an alternate

bypass source, without exceeding the transient limits specified

herein, when an overload or malfunction occurs within the UPS, or

for bypassing the UPS for maintenance.

iii. The transfer control logic shall automatically turn on the static transfer switch, transferring the critical AC load to the bypass

source, after the transfer logic senses any of the following

conditions:

Inverter overload capacity exceeded.

Critical AC load overvoltage or undervoltage.

Battery protection period expired.

UPS fault condition.

iv. The transfer control logic shall inhibit an automatic transfer of the critical load to the bypass source if any of the following conditions

are present:

Inverter/bypass voltage difference exceeding preset limits.

Bypass frequency out of limits.

Bypass out-of-synchronization range with inverter output

v. Uninterrupted Retransfer: Retransfer of the critical AC load from the bypass source to the inverter output shall be automatically

initiated unless inhibited by manual control. The transfer control

logic shall inhibit an automatic retransfer of the critical load to the

inverter if one of the following conditions exists:

Bypass out of synchronization range with inverter output.

Inverter/bypass voltage difference exceeding preset limits.

Overload condition exists in excess of inverter full load rating.

UPS fault condition present

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f. Internal Maintenance Bypass Switch:

i. General: A manually operated maintenance bypass switch shall be incorporated into the UPS cabinet to directly connect the critical

load to the bypass AC input power source, bypassing the

rectifier/charger, inverter, and static transfer switch.

ii. Isolation: All energized terminals shall be shielded to ensure that maintenance personnel do not inadvertently come in contact with

energized parts or terminals. A means to de-energize the static

switch shall be provided when the UPS is in the maintenance

bypass mode of operation.

iii. Maintenance Capability: With the critical load powered from the maintenance bypass circuit, it shall be possible to check out the

operation of the rectifier/charger, inverter, battery, and static

transfer switch.

g. Batter Power Pack:

i. Batteries used in the battery power pack shall be sealed, lead-acid valve regulated (VRLA) battery cells. Battery cells shall be

mounted on slide-out trays for ease of maintenance. A battery

disconnect circuit breaker with undervoltage release (UVR) shall

be included for isolation of the battery pack from the UPS module.

The UPS shall automatically be disconnected from the battery by

opening the breaker when the battery reaches the minimum

discharge voltage level. Casters and leveling feet shall also be

provided with the battery power pack cabinet for ease of

installation. When the application calls for the battery cabinet to

be bolted to the UPS cabinet, the interconnecting cables are to be

provided, precut and pre-lugged.

ii. The batteries shall be warranted for minimum two-year for a float service life at 25 degrees Centigrade.

iii. The UPS system shall have allowance for extended runtime by the adding battery cells in additional battery cabinet(s).

iv. Battery Protection:

The UPS shall have over-current protection measures that protect the batteries from all short circuit fault conditions.

The UPS shall be equipped with internal battery circuit breaker.

The UPS shall terminate battery operations when the battery voltage drops below 1.67V per cell.

The UPS shall terminate inverter operations 1 minute after the battery voltage drops below 1.7V per cell.

The UPS shall terminate charging operations when the battery bus voltage exceeds the predetermined set point,

and generate an alarm to annunciate this condition.

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v. Advanced Battery Management

The UPS charging system shall enter the rest mode after recharging batteries to full capacity. At rest mode,

continuous float charging of the battery shall be

discontinued.

The UPS shall monitor the battery operations and provide status to end user of battery runtime via the display on front

panel, and the management software (via communications

port/module). Runtime calculations shall be based on load

demand and analysis of battery health.

The UPS shall periodically test and monitor battery health and provide warnings via the display on front panel, and to

the management software when battery capacity falls below

80% of original capacity. Battery testing may also be user

initiated via front panel or the management software.

h. User Interface:

i. The UPS shall include a front panel display consisting of a graphical LCD display with backlight, status LEDs, and a keypad.

ii. The Graphical LCD display shall display UPS function and operating parameters in English. It shall be used to signify the

operating state of the UPS, for indicating alarms, for changing

operations control parameters and set points.

iii. The LEDs shall indicate status of the following conditions: Alarms, On Battery, On Bypass, and Power On.

iv. UPS shall have keypad to allow user to adjust UPS parameters, view alarm and inverter logs, change UPS operational modes, and

turn the UPS on and off.

v. The UPS shall include communications interface that interfaces with the manufacturer supplied management software. The

management software, in conjunction with the communication

interface, shall provide the following capabilities:

Interface module which provides TCP/IP (Ethernet) communication interface via an RJ45 connector Display

input and output voltage and other operating characteristics

Notify end-users in the event of a power anomaly via network, E-mail or page.

For communicating with the management software, the UPS shall be equipped with One RS232 communications

port and two communication slots in the back of the UPS

allowing for additional connectivity options, including

SNMP/Web, AS/400 relays, Modbus/Jbus capabilities, etc.

vi. Provide the communications interface module necessary for interfacing using an Ethernet 100BaseT connection.

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i. Provided Accessories:

i. Input Filter: The rectifier/charger shall include an input filter to reduce reflected input current distortion to 10% THD at full load

with nominal input voltage. Another benefit of the input filter shall

be to maintain the input power factor at 0.90-0.96 lagging

minimum from full load to half load with nominal input voltage.

ii. Optional Programmable Relay Board: Eight sets of isolated Form C contacts shall be provided to indicate a change of status of any

of the alarm conditions. Any of the UPS alarms can be

programmed onto any channel of the programmable relay board.

F. Diesel Engine Stand-By Generator Set

1. Provide a diesel-powered standby generator to backup electric service. The generator set shall be built, tested and shipped by one manufacturer to ensure

single source of supply and responsibility. Consideration shall be given only to

manufacturers meetings the following qualifications

a. The standby generating units shall receive the manufacturer's standard testing to ascertain that they are functioning correctly prior to shipment.

b. Twenty-four hours, seven days a week operating service facility with complete spare parts stock within 150 miles of Project Site. Delegation of

this service responsibility for any or all of the equipment listed herein shall

not be considered fulfillment of these Specifications.

c. Service capability to provide, after acceptance of equipment, four service calls per year in two years by a qualified maintenance or service

representative, with provision that each call shall not exceed one day of

service. Service calls shall not include materials, parts or equipment

2. The basis of design is a Cummins Power System Diesel Generator Model No. C40D6 40 kW with permanent magnet excitation and 105 degree C rise

alternator. Load and sizing calculations must be submitted to the Engineer for

approval as specified below for any substitution to the above generator.

3. Standby generator shall include an automatic transfer switch (ATS) installed in the modular building.

4. Standby generator set shall be rated continuous standby (defined as continuous for the duration of any power outage) at the following capacities:

a. Generator rating capacities as herein specified at 0.8 power factor for standby applications, and rated in accordance with NEMA Class H

temperature rise.

b. Generator Characteristics: (Minimum Nameplate Rating Values at Specified Design Conditions Including Step Loading and Ambient

Temperature.)

i. Capacity: 40 KW

ii. Voltage (Grounded Wye): 208Y/120

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iii. Phase:

iv. No. Of Service Wires: 4

5. The generator shall be capable of starting the loads as indicated in the one line distribution schematic on the Drawings as well as 10% of additional load on each

transfer switch. The generator set shall be capable of recovering to a minimum of

90% of rated no load voltage following the application of the specified kVA load

at near zero power factor applied to the generator set. Maximum voltage dip on

application of this load, considering both alternator performance and engine speed

changes shall not exceed 25%.

6. The operating environment of the power generating system shall be:

Altitude 580 feet

Outside temperature, max. 104 deg. F

Outside temperature, min. -20 deg. F

Engine jacket water, glycol 50 percent

Installation Outdoor Weather Protective

Fuel type Diesel Fuel Oil No. 2

Cooling system type Radiator, blower fan, engine mounted

7. Diesel Engine: Heavy duty industrial type, water-cooled, of four stroke cycle compression ignition operation, having solid-injection, and of either vertical in-

line or V-type design. Minimum displacement shall be 199 cubic inches, with 4

cylinders.

a. Engine designed to operate at 1800 RPM at normal full load operation.

b. Provide engine with removable wet or dry type cylinder liners of close-grained alloy cast iron.

c. Provide engine capable of satisfactory performance when operating on commercial grade No. 2 Fuel Oil (ASTM D 396). Engines requiring

premium or special fuels will not be considered.

d. Provide engine capable of operating without loss in power up to 5,000 feet elevation in an ambient temperature of 125 degrees Fahrenheit

8. Electronic Governor: Engine provided with an electronic solid state governing system for precise speed control of the prime mover. Provide a governor capable

of operation in a droop or constant speed system with control at any set speed to

be isochronous within plus or minus .25 percent

a. Governing system shall comprise an electronic control module, a speed setting potentiometer, a magnetic pick-up and a hydraulic actuator with

fail-safe provisions for loss of power or speed. A sensor signal is

incorporated in control module to shutdown the prime mover.

b. The governor system shall operate from starting batteries and allow automatic paralleling with one or more generator sets.

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c. Fail-safe features shall include a separate overspeed device to prevent prime mover run-away in the event of any failure, which might render the

governor inoperative.

9. Diesel Fuel System Components:

a. Fuel system equipped with a fuel filter having replaceable elements, which may be easily removed from their housing for replacement without

breaking any fuel line connections, or disturbing the fuel pumps or any

other part of the engine. Locate fuel filters in one easily accessible

housing, ahead of fuel injection pumps so fuel is thoroughly filtered before

it reaches the pumps. No screens or filters requiring cleaning or

replacement permitted in the injection pump or injection valve assemblies.

b. Injection pump of positive action, constant-stroke design and actuated by a cam driven by gears from the engine camshaft. Engine shall have an

individual mechanical injection pump and injection valve for each

cylinder, of a type not requiring adjustment in service and capable of

replacement within a few minutes.

c. Provide a manual shut-off valve on the fuel line and any check valves, flexible fuel connections and such other items that may be required for

proper operation of the engine.

10. Lubrication:

a. Engine provided with a gear-type lubricating oil pump for supplying oil under pressure to main bearings, crank pin bearings, pistons, piston pins,

timing gears, cam-shaft bearings and valve rocker arm mechanism.

b. Provide a suitable water-cooled oil cooler.

c. Threaded spin-on type oil filters provided and so located and connected that lubricating oil is continuously filtered and cleaned. Filters shall be

conveniently located for servicing. Equip filters with a spring loaded

bypass valve as an assurance against stoppage of lubricating oil circulation

in the event filters become clogged.

11. Air Cleaners: Engine provided with one or more dry type replaceable element air cleaners of sufficient capacity to effectively protect working parts of the engine

from dust and grit. Crankcase connected together with engine air intake with a

tube to eliminate crankcase emissions.

12. Automatic Starting System:

a. Provide engine equipped with an electric starting system with positive engagement drive and of sufficient capacity to crank the engine at a speed,

which will allow full diesel starting of the engine. System shall be 24

volts or as recommended by engine manufacturer.

b. Automatic Controls: Fully automatic start-stop controls provided in generator set control panel. Controls shall provide shutdown for low oil

pressure, high coolant temperature, engine overspeed, engine overcrank,

and three single pole double throw auxiliary contacts for activating

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accessory items, contacts actuate upon an engine start signal. Include a

minimum 30 second single cranking cycle limit with lockout. Also

provide two timed output contacts meeting intake louver control

requirements.

c. Batteries: Lead-acid storage battery set of heavy-duty diesel starting type. Battery voltage compatible with starting system. Batteries of sufficient

capacity to provide for four consecutive full starts consisting of four

complete cranking cycles of ten seconds each and ten seconds rest, and in

no case less than 225 AH (minimum of 1000A. CC). Provide battery rack,

necessary cables, charger, battery heaters and clamps.

13. Heaters:

a. An engine mounted, thermostatically controlled immersion type engine water jacket heater to be provided to insure maintaining engine block

coolant temperature in the range of 120 to 140 degrees F (49 to 60 degrees

C).

i. Heater to be suitable for operation on 208 volts, 1-phase AC power, wattages per manufacturer’s recommendations.

ii. Heater shall include a lube oil pressure switch for automatic cut-out on engine start.

iii. Provide isolation ball valves on water jacket heater

b. Generator winding anti-condensation strip heater, 120 volts A.C. thermostatically controlled. Factory wired to the generator control panel.

Wattage as per manufacturer's recommendations.

c. Generator control panel heater, 120 volts A.C. thermostatically controlled. Factory wired to the generator control panel. Wattage as per

manufacturer's recommendations.

d. Battery heater, 120 volts A.C. thermostatically controlled. Factory wired to the generator control panel. Wattage as per manufacturer's

recommendations.

14. Engine Cooling: The cooling system for each emergency standby unit shall have sufficient capacity for cooling the respective engine when the generator set is

delivering full-rated load at the design ambient temperature.

a. Engine Circulating System

i. Each engine shall be equipped with an engine driven, centrifugal-type water circulating pump for circulating water through engine

jacket, cylinder heads and radiator;

ii. Thermostatic valve to maintain the engine at recommended temperature level under all load conditions.

iii. Each cooling system shall be equipped with one or more spin-on type engine water filters, which will treat the coolant and prevent

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corrosion and scale deposits from forming inside the cooling

system.

iv. Provide a gate valve between engine and jacket water heater to facilitate maintenance on jacket water heater.

b. Provide a skid-mounted radiator and cooling system rated for fuel load operation in 122 degrees F (50 degrees C) ambient as measured at the

generator air inlet. The cooling system shall be filled with 50/50 ethylene

glycol/water mixture by the equipment supplier. Rotating parts shall be

guarded against accidental contact per OSHA requirements.

15. Generator: Generator shall be a 4 pole revolving field synchronous type, brushless, with a permanent magnet exciter, coupled directly to the engine

flywheel through a flexible coupling arrangement designed for positive alignment.

The generator shall be of a single sealed bearing design, bearing being

maintenance free and lifetime lubricated. The generator housing shall be bolted

directly to the engine flywheel housing. The rotor shall be dynamically balanced

for operating speeds up to 125 percent of rated speed. The rotor shall be

constructed using techniques such that shaft currents are negligible and an

insulated bearing is not needed. The rotor shall be provided with full amortisseur

windings.

a. Generator construction shall comply with all applicable sections of NEMA Standard MG-1. Generator insulation shall be Class H protected with 100

percent epoxy impregnation and an overcoat of resilient insulating

material on the stator and rotor to reduce possible fungus and/or abrasion

deterioration. Incorporate reactive droop compensation.

b. Generator field excitation performed through a solid state, brushless, full wave rectification, rotating diode system.

c. The generator shall be capable of maintaining 300 percent of the standby current during short circuit conditions for a minimum of 10 seconds

without the addition of external hardware such as a current boost system.

d. Generator provided with a solid state voltage regulator. Voltage regulator mounted in the control panel on the generator. A built-in voltage

adjusting rheostat shall provide five percent voltage adjustment. The

voltage regulator shall have an adjustable maximum voltage dip. The

voltage regulator shall also include over excitation protection that will turn

the voltage regulator off to protect the generator in the event of extended

operation in an overload condition. The generator shall be equipped with

an overvoltage protection device as standard equipment to prevent damage

to the generator and connected loads in the event that the generator goes

into an overvoltage situation. The overvoltage device shall be factory set

for 125 percent of rated voltage. The voltage regulator shall have been

designed for use with a diesel engine prime mover. The voltage regulator

shall have been designed around the engine generator match for optimum

load pick up.

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e. Voltage Regulation: From no load to rated load maintained within a band of plus or minus 0.5 percent of rated voltage. The steady state voltage

stability shall remain within a 0.5 percent band of rated voltage. Steady

state voltage modulation shall not exceed one cycle per second.

f. One step load acceptance shall be 100 percent of nameplate KW rating to meet NFPA 110, Paragraph 5-13.2.6.

g. For any addition of load up to and including 100 percent of rated load, the transient voltage dip shall not exceed 20 percent of rated voltage. The

voltage shall recover to, and remain within, the steady band in not more

than 1.5 seconds. The unit to be able to nameplate power output in

ambient temperature of 125 degrees F (52 degrees C).

16. Frequency Regulation: Under varying loads from no load to full load shall be isochronous. Random frequency variation shall not exceed plus or minus 0.25

percent.

17. Communication Interface: Provide appurtenant electronic interface module with the generator controller for interfacing the generator controller with a remote

monitoring gateway via RS485 serial communication.

18. Circuit Breaker:

a. A generator mounted main line molded case circuit breaker shall be provided for each unit. Each circuit breaker shall serve as a load circuit

interrupting and protective device which shall operate both manually for

normal switching functions and automatically during overloads and short

circuit conditions.

b. Circuit breakers shall be sized as follows:

Generator Size

Circuit Breaker

Frame Size Trip Setting Breaker Type

40KW 250 Amp 200 Amp LE

c. Circuit breakers shall be a solid state trip breaker with electronic trip unit having the following adjustable trip unit functions:

i. Long time rating and delay ii. Short time pickup and delay iii. Instantaneous pickup iv. Ground fault pickup (alarm only)

d. Circuit breaker shall be 80% rated; and be provided with a shunt trip attachment for emergency power shut-off.

e. Circuit breakers shall conform to types indicated above as manufactured by the Square D Company, General Electric, Siemens Industry for LV

Power Distribution, Eaton Electric or Approved Equal.

19. Engine-Generator Set Control. The generator set shall be provided with a Cummins PowerCommand 3.3 Series microprocessor-based control system, that

is designed to provide automatic starting, monitoring, and control functions for

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the generator set. The control system shall also include a Cummins

PowerCommand Series 500/550 Remote Monitoring Gateway module, designed

to allow local monitoring and control of the generator set, and remote monitoring

and control as described in this specification.

a. The control shall be mounted on the generator set. The control shall be vibration isolated and prototype tested to verify the durability of all

components in the system under the vibration conditions encountered.

i. The generator set mounted control shall include the following features and functions:

ii. Three position control switch labeled RUN/OFF/AUTO. In the RUN position the generator set shall automatically start, and

accelerate to rated speed and voltage. In the OFF position the

generator set shall immediately stop, bypassing all time delays. In

the AUTO position the generator set shall be ready to accept a

signal from a remote device to start and accelerate to rated speed

and voltage.

iii. RESET switch. The RESET switch shall be used to clear a fault and allow restarting the generator set after it has shut down for any

fault condition.

iv. PANEL LAMP switch. Depressing the panel lamp switch shall cause the entire panel to be lighted with DC control power.

v. Generator Set AC Output Metering: The generator set shall be provided with a metering set with the following features and

functions:

Analog AC Voltmeter, dual range, 90 degree scale, 2% accuracy;

Analog AC Ammeter, dual range, 90 degree scale, 2% accuracy;

Analog Frequency/RPM meter, 45-65 Hz, 1350-1950 RPM, and 90 degree scale, +/- 0.6 Hz accuracy.

Seven position phase selector switch with OFF position to allow meter display of current and voltage in each

generator phase. When supplied with reconnectable

generators, the meter panel shall be reconnectable for the

voltage specified

b. Generator Set Alarm and Status Display: The generator set shall be provided with alarm and status indicating lamps to indicate non-automatic

generator status, and existing warning and shutdown conditions. The

lamps shall be high-intensity LED type. The lamp condition shall be

clearly apparent under bright room lighting conditions. The generator set

control shall indicate the existence of the following alarm and shutdown

conditions on an alphanumeric digital display panel.

i. Low oil pressure (alarm)

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ii. Low oil pressure (shutdown) iii. Oil pressure sender failure (alarm) iv. Low coolant temperature (alarm) v. High coolant temperature (alarm) vi. High coolant temperature (shutdown) vii. Engine temperature sender failure (alarm) viii. Low coolant level (alarm or shutdown--selectable) ix. Fail to crank (shutdown) x. Fail to start/overcrank (shutdown) xi. Overspeed (shutdown) xii. Low DC voltage (alarm) xiii. High DC voltage (alarm) xiv. Weak battery (alarm) xv. High AC voltage (shutdown) xvi. Low AC voltage (shutdown) xvii. Under frequency (shutdown) xviii. Over current (warning) xix. Over current (shutdown) xx. Short circuit (shutdown) xxi. Ground fault (alarm) (when required by code or specified) xxii. Over load (alarm) xxiii. Emergency stop (shutdown)

c. Provisions shall be made for indication of four customer-specified alarm or shutdown conditions. Labeling of the customer-specified alarm or

shutdown conditions shall be of the same type and quality as the above

specified conditions. The non-automatic indicating lamp shall be red, and

shall flash to indicate that the generator set is not able to automatically

respond to a command to start from a remote location.

d. Engine Status Monitoring: The following information shall be available from a digital status panel on the generator set control:

i. Engine oil pressure (psi or kPA) ii. Engine coolant temperature (degrees F or C) iii. Engine oil temperature (degrees F or C) iv. Engine speed (rpm) v. Number of hours of operation (hours) vi. Number of start attempts vii. Battery voltage (DC volts)

e. The control system shall also incorporate a data logging and display provision to allow logging of the last 10 warning or shutdown indications

on the generator set, as well as total time of operation at various loads, as a

percent of the standby rating of the generator set.

f. Alternator Control Functions:

i. The generator set shall include an automatic digital voltage regulation system that is matched and prototype tested with the

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governing system provided. It shall be immune from mis-

operation due to load-induced voltage waveform distortion and

provide a pulse width modulated output to the alternator exciter.

The voltage regulation system shall be equipped with three-phase

RMS sensing and shall control buildup of AC generator voltage to

provide a linear rise and limit overshoot. The system shall include

a torque-matching characteristic, which shall reduce output voltage

in proportion to frequency below a threshold of 58 HZ. The

voltage regulator shall include adjustments for gain, damping, and

frequency roll-off. Adjustments shall be broad range, and made

via digital raise-lower switches, with an alphanumeric LED

readout to indicate setting level. Rotary potentiometers for system

adjustments are not acceptable.

ii. Controls shall be provided to monitor the output current of the generator set and initiate an alarm (over current warning) when

load current exceeds 110% of the rated current of the generator set

on any phase for more than 60 seconds. The controls shall shut

down and lock out the generator set when output current level

approaches the thermal damage point of the alternator. The

protective functions provided shall be in compliance to the

requirements of NFPA70 article 445.

iii. Controls shall be provided to individually monitor all three phases of the output current for short circuit conditions. The

control/protection system shall monitor the current level and

voltage. The controls shall shut down and lock out the generator

set when output current level approaches the thermal damage point

of the alternator (short circuit shutdown). The protective functions

provided shall be in compliance to the requirements of NFPA70

article 445.

iv. Controls shall be provided to monitor the KW load on the generator set, and initiate an alarm condition (over load) when total

load on the generator set exceeds the generator set rating for in

excess of 5 seconds. Controls shall include a load shed control, to

operate a set of dry contacts (for use in shedding customer load

devices) when the generator set is overloaded.

v. An AC over/under voltage monitoring system that responds only to true RMS voltage conditions shall be provided. The system shall

initiate shutdown of the generator set when alternator output

voltage exceeds 110% of the operator-set voltage level for more

than 10 seconds, or with no intentional delay when voltage exceeds

130%. Under voltage shutdown shall occur when the output

voltage of the alternator is less than 85% for more than 10 seconds.

vi. A battery monitoring system shall be provided which initiates alarms when the DC control and starting voltage is less than

25VDC or more than 32 VDC. During engine starting, the low

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voltage limit shall be disabled, and if DC voltage drops to less than

14.4 volts for more than two seconds a "weak battery" alarm shall

be initiated

g. Control Interfaces for Remote Monitoring. Provide the following features in the control system:

i. Control interface, and appurtenances, for integration with Commins PowerCommand series 500/550 Remote Monitoring

Gateway module. To be installed on inside wall of

Communications Shelter, as shown on plans.

ii. Form "C" dry common alarm contact set rated 2A @ 30VDC to indicate existence of any alarm or shutdown condition on the

generator set.

iii. One set of contacts rated 2A @ 30VDC to indicate generator set is ready to load. The contacts shall operate when voltage and

frequency are greater than 90% of rated condition.

iv. A fused 10 amp switched 12VDC power supply circuit shall be provided for customer use. DC power shall be available from this

circuit whenever the generator set is running.

v. A fused 20 amp 12VDC power supply circuit shall be provided for customer use. DC power shall be available from this circuit at all

times from the engine starting/control batteries

h. Furnish and install a 20-light LED type remote alarm annunciator with horn, located as shown on the Drawings. The remote annunciator shall

provide all the audible and visual alarms called for by NFPA Standard 110

for level 1 systems; and in addition shall provide indications for fuel leak,

high battery voltage, low battery voltage, loss of normal power to the

charger. Spare lamps shall be provided to allow future addition of other

alarm and stat