30kW Standby / 27kW Prime Power Towable Generator
1.0
General
The generator set covered by these specifications shall be a complete, operable and tested
towable diesel generator by Caterpillar or an equivalent supplier. The sound attenuated generator
shall be of robust quality construction.
The generator shall be powered by a Caterpillar brand diesel engine with documented
compliance to current EPA Tier emissions standards.
The generator shall have well documented warnings and instructions so as to highlight electrical
hazard and operation indicators using internationally recognized ISO symbols.
1.1
References and Standards
The generator set covered by these specifications shall be designed, tested, rated, assembled
and installed in strict accordance with all applicable standards below:
(From spec sheet)
– ISO 8528 G1/G2
– EN61000-6
– NEMA MG-1.22
– IEC60034
– C22.2 No.100
– UL142
– NFPA 70, NFPA99 and NFPA 110
1.2
Requirements and Codes
The equipment supplied shall meet the applicable requirements of the NEC and all applicable
local codes and regulations. The generator set shall be constructed completely of all new
components of current production. The supplier of the diesel engine must be the same entity
as the generator packager and have a minimum of 25 years of equipment manufacturing
experience. The source packaging facility must be certified to ISO9001 standards.
1.3
Substitution
Proposed deviations from the specifications shall be treated as follows:
1.3.1 Substitution Time Requirement
Requests for substitutions shall be made a minimum of ten (10) days prior to bid date.
Manufacturers catalog data shall accompany each request and authorized acceptance shall be
addenda only.
1.3.2 Substitution Responsibility
The power system has been designed to the specified manufacturer's electrical and physical
characteristics. The equipment sizing, spacing, amounts, electrical wiring, and other
characteristics have all been sized and designed around CATERPILLAR supplied equipment.
Should any substitutions be made, the bidder shall bear responsibility for the installation,
coordination and operation of the system as well as any engineering and redesign costs, which
may result from such substitutions.
1.4
Submittals
Engine-generator submittals shall include the following information:
1. Factory published specification sheet including total equipment weight, power output
at available voltages, oil capacity, fuel capacity, fuel consumption, cooling capacity,
airflow, exhaust flow, and generator set noise provided in dBA as an 8 point
logarithmic average at 23 ft.
2. Manufacturer’s catalog cut sheets of all optional equipment.
3. Manufacturer's warranty statement
1.5
Warranty
The genset warranty period shall be 12 months with no limitation on the number of available
run hours for prime power applications and 24 months and 1000 hours for standby
applications. All terms begin after date of delivery to the first user.
1.6
Service
The engine-generator supplier shall maintain 24-hour parts and service capability within 100
miles of the buyer’s location. The distributor shall stock parts as needed to support the
generator set package for this specific project. The supplier must carry sufficient inventory to
cover no less than 80% parts service within 24hrs and 95% within 48 hours. The supplier
shall provide factory certified electric power service technicians.
1.6.1
Extended Service Coverage
The genset supplier shall provide firm quote for an optional extended service coverage contract
for 5 years and 2500 hours with no deductible. Extended Service Coverage provides for 100
percent of usual and customary parts and labor costs for failures due to defects in materials and
workmanship to the “as shipped consist” from the factory, excluding certain items such as trailer
components and consumables as outlined in the ESC contract document up to 8 hours and 320
miles per incident.
2.0
Product Requirements
2.1
Rating
The generator set shall be a Caterpillar Model XQ30 rated for prime power duty and operating
at 1800 RPM (60 Hertz) with the minimum power output capabilities:
• 208/120V 3-phase, 4-wire, prime power: 27kW (33.8 kVA)
• 480/277V 3-phase, 4-wire, prime power: 27kW (33.8 kVA)
• 240/120V 1-phase, 3-wire, prime power: 24kW (24 kVA)
Prime power output ratings shall be defined per ISO8528 as delivering an average load factor of
70% of the prime power rating with varying load for an unlimited number of hours per year with
a permissible 10% overload capability for emergency purposes for 1 in 12 hours.
The generator voltage shall be selectable via a voltage selector switch which shall be mounted
inside the generator enclosure and away from the control panel to prevent switching while the
genset is in operation.
2.1.1 Material and Parts
All materials and parts comprising the unit shall be new and unused.
2.2
Engine
The engine shall be a turbocharged, four-cycle, 2.2 liter displacement diesel engine. It shall be
water-cooled and operate with nominal speed not exceeding 1800 RPM. The Brake Mean
Effective Pressure (BMEP) shall not exceed 143.1 psi for operating at the prime power rating for
engine longevity. The engine will utilize in-cylinder combustion technology, as required, to
meet applicable EPA non-road mobile regulations for compression ignition engines. Actual
engine emissions values must be in compliance with applicable EPA emissions standards per
ISO 8178 – D2 Emissions Cycle at specified ekW / bHP rating. Utilization of the “Transition
Program for Equipment Manufacturers” (also known as “Flex Credits”) to achieve EPA
certification is not acceptable. Emissions requirements / certifications of this package: EPA Tier
4 Interim.
The engine will be equipped with an isochronous electronic governor, compliant with ISO3046
Class A1 providing steady state speed regulation to =/- 0.25%.
2.3
Generator
The generator shall be screen protected and drip-proof, AREP excitation, self-regulating,
brushless generator with fully interconnected damper windings, IC06 cooling system and sealedfor-life bearings. A 2/3 pitch factor is standard on all stator windings. Voltage output shall be
switchable via a voltage selector switch labeled as 480/277 volt 3-phase, 208/120 volt 3-phase,
and 240/120 volt 1-phase.
The generator shall be listed by Canadian Standards Association (CSA Approved).
2.3.1 Insulation System
The insulation system shall be Class H with windings impregnated in a triple dip thermo-setting
moisture, oil and acid resisting polyester varnish plus a heavy coat of anti-tracking varnish for
additional protection against moisture or condensation.
2.3.2 Electrical Characteristics
Electrical design in accordance with BS5000 Part 99, IEC60034-1, EN61000-6, NEMA MG1.22.
2.3.3 Automatic Voltage Regulator (AVR)
The fully sealed automatic voltage regulator shall maintain the voltage within the limits of ±
0.5% at steady state from no load to full load. Nominal adjustment shall be by means of a
trimmer incorporated in the AVR. The panel door shall also incorporate an additional voltage
adjustment potentiometer.
2.3.4 AREP Voltage Excitation
The generator shall be equipped with a AREP voltage regulator excitation so as to provide
enhanced short circuit capabilities, motor starting and non-linear loading performance.
2.3.5 Waveform Distortion, THF and TIF Factors
The total distortion of the voltage waveform with open circuit between phases or phase and
neutral shall be in the order of 1.8. On a 3-phase balanced harmonic-free load the total distortion
is < 4%. Machines shall be designed to have a THF less than 2% and a TIF less than 50.
2.3.6 Radio Interference
Suppression shall be in line with the provisions of EN61000-6.
2.3.7 Anti-condensation heaters
120VAC anti-condensation heaters shall be installed in the generator. The heater control
circuitry shall automatically shut the heaters off when the genset starts. (optional).
3.0 Component and Systems
3.1 Electrical Distribution Panel
A electrical distribution panel shall be collocated with the genset controls behind a single access
door with the following connection types:
3.1.1 Bus Studs
One set of Main bus connection (5 posts for each of 3 phases plus neutral plus ground) studs with
non-conducting dividers to prevent contact between phase cables. Bus studs shall be enclosed
with hinged transparent cover for easy access. A trip relay shall be installed in the bus door
cover such that the primary breaker is tripped if the protective door is opened while the bus is
energized for operator safety. A weather protective rubber strip shall be affixed at generator
distribution panel door to prevent water ingress and reduce sheet metal contact with distribution
cables.
3.1.2 California Twistlock Receptacles
Two single-phase California style Twistlock receptacles, code CS6369, rated to provide 50
Amps and 240 Volt single phase power with 4 wires including 2 phase legs + neutral + ground
connection.
3.1.3 NEMA Locking Receptacles
Two NEMA locking receptacles, NEMA code L21-20R, to provide 20 amps each of 3 phase
208/120V power.
3.1.4 Circuit Breakers
One 3-pole MCCB with solid neutral (4 Wire). UL/CSA listed with shunt trip. Integral trip unit
for thermal and magnetic overload protection on MCCB. Individual sub-circuit breakers for
protection of individual receptacles shall also be provided.
3.1.5 Duplex Receptacles
Two GFCI Duplex receptacles rated for 20 Amps and 120V single phase
3.1.6 Stop / Start Connections
One two-wire set of remote start connection terminals shall be provided.
3.1.7 Shore Power Connection
One 30A, 125V single phase NEMA locking inlet receptacle shall be provided to provide an
external power source for generator internal loads.
3.2
Control Panel
Supplier shall provide a set mounted auto start panel in a vibration isolated NEMA 1 sheet steel
enclosure with a hinged lockable door and viewing window for monitoring when the door is
closed. The panel shall be collocated behind a common door with the distribution panel.
The control panel shall include the following:
– Manual run/off/auto switch and panel light with on/off switch
– Panel light ON/OFF switch
– Separate pre-heat pushbutton.
– Red emergency stop pushbutton
– Lamp test/reset pushbutton
– AC instrumentation: 1-voltmeter, 1-ammeter, 1-frequency meter
– Engine gauges for: oil pressure, coolant temperature, battery volts, fuel level
– Fuel level display with momentary activation pushbutton
– Hours run meter
– Voltage adjust potentiometer
– 7 Position voltmeter phase selector switch
– 4 Position ammeter phase selector switch
– Shutdowns: high coolant temperature/low coolant level, low oil pressure, overcrank,
overspeed.
– Alarms: Low fuel level/fuel tank leak alarm
– Printed circuit board control logic
– Autostart capability
– Cycle cranking with 3 adjustable time crank/rest periods
– Battery charger, UL Listed 5 Amp, constant voltage (optional)
3.3
Fuel System
The fuel system shall be a single wall steel (77.0 gallon) fuel tank (or optional dual wall 45.4
gallon) UL Listed fuel tank design. The complete fuel tank shall be integral with the genset base
frame allowing the genset to be removed from the optional trailer while still providing the
specified run time without need for external fuel tanks. The fuel system shall have the capacity
to run for a minimum of 45 hours on a single fuel fill at 75% average prime power load (26 hours
on a single fuel fill at 75% average prime power with optional dual wall tank). The fuel system
shall include 3-way fuel valves which allow the user to select between on-board and external fuel
supplies. In addition to a Racor fuel filter, there shall also be installed a primary fuel filter/water
separator in the fuel inlet line to the engine. All fuel piping shall be black iron or flexible fuel
hose rated for this service. No galvanized piping shall be permitted.
A lockable fuel fill and mechanical reading fuel level gauge shall be provided. A low fuel level
alarm contact, and (fuel tank rupture alarm contact for optional dual wall tank) shall be provided.
A manual fuel priming pump integrated into the fuel filter shall be provided for ease of starting.
3.4
Lube System
The lube system shall come complete with spin-on lube oil filters, lube oil cooler, crankcase
breather with collection assembly, and lube oil. The oil drain lines shall be routed to the base of
the unit and include valves to simplify the oil change process.
3.5
Exhaust System
An internally mounted critical silencer with flexible connector with vertical exhaust discharge
shall be provided. No site installation of exhaust components shall be required. Heat guards
shall be provided to protect personnel from exhaust heat per OSHA standards.
3.6
Starting System
The starting system shall consist of a 12 volt system with 65A battery charging alternator, and
starter motor on engine. The engine shall include glow plugs fitted on the engine to improve
startability in cold climates. A 12V Cat brand heavy duty maintenance free battery, battery rack,
and cables on the generator set baseframe shall be provided. A UL and CSA Listed 3 Amp 120
VAC battery charger shall be mounted on control panel. (optional).
3.7
Cooling System
The generator set shall come with a vertical discharge, cooling system. The package mounted,
cooling system shall be complete with radiator, blower fan, fan drive, drive guard, belt guards
and shall ship from the factory with 50% coolant antifreeze with corrosion inhibitor. The
cooling system shall also include a coolant level reservoir/sight gauge and coolant drain line
routed to the exterior of the package with shutoff valve.
3.7.1 Jacket Water Heater
A 120 VAC, thermostatically controlled coolant heater shall be provided to ensure specified
engine start capability under cold environmental conditions. The coolant heater shall be
protected by a fuse in the control panel and the AC supply shall be disconnected automatically
upon engine start. The coolant heater shall be compatible with all approved engine coolant
additives (optional).
3.8
Sound Attenuated Enclosure
The fully weatherproof and sound attenuated enclosure shall provide sound attenuation of
61dBA at 23ft. The enclosure shall be painted white with a black base and lifting arch.
Enclosure construction shall incorporate the following features:
– 12 gauge sheet steel components pretreated with zinc phosphate prior to polyester powder
coating at 200° C (392° F)
– Black stainless steel padlockable latches
– Zinc die cast hinges/grab handles
– Rooftop maintenance access doors for fluids access
– Side doors for genset compartment access
– Front panel for air discharge box access
– Lube oil and cooling water drains piped to exterior of the enclosure
– Safety glass control panel viewing window in a lockable access door
– Cooling fan and battery charging alternator fully guarded
– Fuel fill and battery reachable only through lockable access doors
– Tested and certified single point lifting eye
– Lifting points on baseframe
3.9
Trailer
The generator set shall be mounted on a double axle towing style trailer. The trailer shall comply
with Federal DOTs Federal Motor Vehicle Safety Standards. It shall be equipped with a 3” eyepintle hitch (2-5/16’’ ball coupler hitch optional). The trailer shall be equipped with a
hydraulically actuated surge brakes (electrically operated brakes optional). Tires shall be rated
as ST225/75R15 - load range C. Electrical connection shall be via a 6-prong plug. The trailer
construction shall be of ASTM A36 Grade structural steel channels. Fenders shall be of 12
gauge galvanized steel, roll-formed and bolt-on. The trailer shall be coated with an epoxy ester
high solid enamel primer, then finish painted with polyurethane, two component, high solid
enamel in gloss black.
3.10 Operation and Maintenance Manuals
The generator set shall be provided with two (2) sets of operation and maintenance manuals.