MQ Power DCA-300SSK III Series User manual

MQ POWERMQ POWER
MQ POWERMQ POWER
MQ POWER
DCA-300SSK IIIDCA-300SSK III
DCA-300SSK IIIDCA-300SSK III
DCA-300SSK III
SERIESSERIES
SERIESSERIES
SERIES
(FEMA)(FEMA)
(FEMA)(FEMA)
(FEMA)
PARTS AND OPERATION MANUAL
Revision #1 (06/02/03)
MULTIQUIP INC..
..
. PARTS DEPARTMENT:
18910 WILMINGTON AVE. 800-427-1244
CARSON, CALIFORNIA 90746 FAX: [phone]
310-537-3700
SERVICE DEPARTMENT:
800-421-1244 800-835-2551
FAX:[phone] FAX:[phone]
E-mail:[email protected] •www:multiquip.com
© COPYRIGHT 2003, MULTIQUIP INC.
PARTS LIST NO. C2871300704
SERIAL NO. 3708297~

PAGE 2 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 3
HERE'S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
PARTS DEPARTMENT
800-427-1244 or 310-537-3700
FAX: [phone] or 310-637-3284
SERVICE DEPARTMENT
800-421-1244
FAX: [phone]
TECHNICAL ASSISTANCE
800-478-1244
FAX: [phone]
WARRANTY DEPARTMENT
888-661-4279, or 310-661-4279
FAX: [phone]

PAGE 4 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
TABLE OF CONTENTS
MQ Power DCA-300SSKMQ Power DCA-300SSK
MQ Power DCA-300SSKMQ Power DCA-300SSK
MQ Power DCA-300SSK
III AC GeneratorIII AC Generator
III AC GeneratorIII AC Generator
III AC Generator
Here's How To Get Help .................................................... 3
Parts Ordering Procedures ............................................... 5
Specifications Generator/Engine ...................................... 6
Dimensions (Top and Side) ............................................... 8
Dimensions (Front and Rear) ............................................ 9
Safety Alert Messages Symbols .................................... 10
Rules for Safe Operation ........................................... 11-13
Installation ................................................................. 14-15
Operation and Safety Decals..................................... 16-17
General Information ........................................................ 18
Major Components ......................................................... 19
Generator Control Panel ............................................ 20-21
Engine Operating Panel ............................................. 22-23
Output Terminal Panel Overview ................................ 24-26
Load Application ............................................................. 27
Generator Outputs .......................................................... 28
Generator Outputs/Gauge Reading ................................. 29
Output Terminal Panel Connections ........................... 30-31
Pre Setup .................................................................. 32-35
Generator Start-up Procedure (Manual) ..................... 36-38
Generator Start-up Procedure (MPEC, Auto) ................. 39
Generator Shutdown Procedure ...................................... 40
Maintenance .............................................................. 42-46
Generator Wiring Diagram ............................................... 47
Engine Wiring Diagram ................................................... 48
Engine Troubleshooting .............................................. 49-50
Generator Troubleshooting .............................................. 51
Engine Controller Troubleshooting (MPEC) ..................... 52
Explanation of Codes in Remarks Column ..................... 54
Suggested Spare Parts .................................................. 55
COMPONENT DRACOMPONENT DRA
COMPONENT DRACOMPONENT DRA
COMPONENT DRAWINGSWINGS
WINGSWINGS
WINGS
Generator Assembly .................................................. 56-59
Control Box Assembly ............................................... 60-65
Engine & Radiator Assembly..................................... 66-69
Engine Operating Panel Assembly ............................ 70-71
Output Terminal Assembly ......................................... 72-75
Actuator Assembly .................................................... 76-77
Battery Assembly ...................................................... 78-79
Muffler Assembly ...................................................... 80-81
Enclosure Assembly ................................................. 82-87
Rubber Seal Assembly .............................................. 88-89
Oil Piping Assembly .................................................. 90-91
Fuel Tank Assembly .................................................. 92-93
Battery Charger ......................................................... 94-95
Name Plate and Decals ........................................... 96-101
Terms and Condition of Sale — Parts .......................... 102
Specification and part
number are subject to
change without notice.
NOTE

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 5
PARTS ORDERING PROCEDURES
When ordering parts,
please supply the following information:
❒❒
❒❒
❒Dealer account number
❒❒
❒❒
❒Dealer name and address
❒❒
❒❒
❒Shipping address (if different than billing address)
❒❒
❒❒
❒Return fax number
❒❒
❒❒
❒Applicable model number
❒❒
❒❒
❒Quantity, part number and description of each part
❒❒
❒❒
❒Specify preferred method of shipment:
✓FedEx or UPS Ground
✓FedEx or UPS Second Day or Third Day
✓FedEx or UPS Next Day
✓Federal Express Priority One
✓DHL
✓Tr u c k
Here’s how to get help...
Please have the model and serial number on
hand when calling.
Parts Department
800-427-1244 Fax: [phone]
310-537-3700 Fax: [phone]
Mayco Parts
800-306-2926 Fax: [phone]
310-537-3700 Fax: [phone]
Service Department
800-478-1244 Fax: [phone]
310-537-3700
MQ Power Service Department
800-835-2551 Fax: [phone]
310-537-3700
Warranty Department
800-421-1244, Ext. 279 Fax: [phone]
310-537-3700, Ext. 279
Multiquip’s Main Phone Numbers
800-421-1244 Fax: [phone]
310-537-3700
Note:Unless otherwise indicated by customer, all
orders are treated as “Standard Orders”, and will
ship within 24 hours.We will make every effort to
ship “Air Shipments” the same day that the order is
received, if prior to 2PM west coast time. “Stock
Orders” must be so noted on fax or web forms.
Extra Discounts!
All parts orders which include complete part numbers
and are received by our automated web parts order
system, or by fax qualify for the following extra
discounts:
Ordered Standard Stock orders
via orders ($750 list and above)
Fax 3% 10%
Web 5% 10%
Special freight allowances
when you order 10 or more
line items via Web or Fax!**
FedEx Ground Service at no charge for freight
No other allowances on freight shipped by any other
carrier.
Place Your Parts Order Via Web or Fax
For Even More Savings!
NOTE:DISCOUNTSARESUBJECTTOCHANGE
MULTIQUIP INC.
18910 WILMINGTON AVENUE
POST OFFICE BOX 6254
CARSON, CALIFORNIA 90749
310-537-3700 • 800-421-1244
FAX: [phone]
E-MAIL: [email protected]
WWW:multiquip.com
Direct TOLL-FREE access
to our Parts Department:
Toll-free nationwide — 800-427-1244

PAGE 6 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
DCA-300SSK III— SPECIFICATIONS
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DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 7
NOTE PAGE

PAGE 8 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
Figure 1. Dimensions (Side and Top Views)
DCA-300SSK III — DIMENSIONS (TOP AND SIDE)

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 9
Figure 2. Dimensions (Rear and Front Views)
DCA-300SSK III — DIMENSIONS (FRONT AND REAR)

PAGE 10 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
Safety precautions should be followed at
all times when operating this equipment.
Failure to read and understand the Safety
Messages and Operating Instructions
could result in injury to yourself and others.
FOR YOUR SAFETY AND THE SAFETY OF OTHERS!
This Owner's Manual has been
developed to provide complete
instructions for the safe and efficient
operation of the MQ Power
Model
DCA-300SSKIII WHISPERWATT™
GENERATORS.
Before using
these GENERATORS, ensure that
the operating individual has read
and understands all instructions
in this manual.
SAFETY MESSAGE ALERT SYMBOLS
The three (3) Safety Messages shown below will inform you
about potential hazards that could injure you or others. The
Safety Messages specifically address the level of exposure to
the operator, and are preceded by one of three words: DANGER,
WARNING, or CAUTION.
DANGER:DANGER:
DANGER:DANGER:
DANGER: You WILL be KILLED or
SERIOUSLY injured if you DO NOT follow
directions.
WW
WW
WARNING:ARNING:
ARNING:ARNING:
ARNING: You CAN be KILLED or
SERIOUSLY injured if you DO NOT follow
directions.
CAUTION:CAUTION:
CAUTION:CAUTION:
CAUTION: You CAN be injured if you
DO NOT follow directions.
HAZARD SYMBOLS
Potential hazards associated with the DCA-300SSK III generators
operation will be referenced with Hazard Symbols which appear
throughout this manual, and will be referenced in conjunction
with Safety Message Alert Symbols.
Rotating Parts
NEVER operate equipment with covers,
or guards removed. Keep fingers, hands,
hair and clothing away from all moving
parts to prevent injury.
NOTE
Accidental Starting
ALWAYS place the power source, circuit
breakers or ON/OFF switch in the OFF
position, when the generator is not in use,
unless connected to transfer switch.
ALWAYS wear approved eye and
hearing protection when required.
Sight and Hearing Hazard
Respiratory Hazard
ALWAYS wear approved respiratory
protection when required.
Equipment Damage Messages
Other important messages are provided throughout this manual
to help prevent damage to your generator, other property, or the
surrounding environment.
This generator, other property, or
the surrounding environment could
be damaged if you do not follow
instructions.
Over-Speed Conditions
NEVER tamper with the factory settings of
the engine governor settings. Personal
injury and damage to the engine or
equipment can result if operating speed
ranges above maximum allowable.
NOTE
DCA-300SSK III — SAFETY MESSAGE ALERT SYMBOLS

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 11
DCA-300SSK III— RULES FOR SAFE OPERATION
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
:
Failure to follow instructions in this manual may
lead to serious injury or even death! This
equipment is to be operated by trained and
qualified personnel only! This equipment is for
industrial use only.
The following safety guidelines should always be used when
operating the DCA-300SSK III SERIES Generators:
GENERAL SAFETY
■ DO NOT operate or service this equipment
before reading this entire manual.
■ This equipment should not be operated by persons under 18
years of age.
■ NEVER operate this equipment without proper
protective clothing, shatterproof glasses, steel-
toed boots and other protective devices required
by the job.
■ NEVER operate this equipment when not feeling
well due to fatigue, illness or taking medicine.
■ NEVER operate this equipment under the
influence or drugs or alcohol.
■ NEVER use accessories or attachments, which are not
recommended by MQ Power for this equipment. Damage to
the equipment and/or injury to user may result.
■ Manufacture does not assume responsibility for any accident
due to equipment modifications.
■ Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
■ ALWAYS check the machine for loosened threads or bolts
before starting.
■ NEVER operate the generator in an explosive atmosphere or
near combustible materials. An explosion or fire could result
causing severe
bodily harm or even death.
■ High Temperatures – Allow the engine to cool before
performing service and maintenance functions. Contact
with hot! components can cause serious burns.
■ The engine of this generator requires an adequate free
flow of cooling air. NEVER operate the generator in any
enclosed or narrow area where free flow of the air is
restricted. If the air flow is
restricted it will cause serious
damage to the generator or
engine and may cause injury to
people. The generator engine
gives off DEADLY carbon
monoxide gas.
■ ALWAYS make sure generator is
properly grounded.
■ NEVER use gas piping as an electrical ground.
■ DO NOT place hands or fingers inside generator engine
compartment when engine is running.
■ ALWAYS make sure generator installation is accordance with
national and local electrical codes .
■ ALWAYS have a qualified electrician perform the generator
wiring installation.
■ NEVER let power cables or cords lay in wate r.
■ NEVER stand in water while AC power from the generator
is being transfer to a load.
■ NEVER use a defective or frayed power cable. Check the
cable for cuts in the insulation.
■ NEVER use a extension cord that is frayed or damaged where
the insulation has been cut.
■ ALWAYS make certain that proper extension cord has been
selected for the job See Table 5.
■ The electrical voltage required to operate the generator can
cause severe injury or even death through physical contact
with live circuits.
Turn all circuit breakers OFF before
performing maintenance on the generator.
■ NEVER touch the hot exhaust manifold,
muffler or cylinder. Allow these parts to
cool before servicing engine or generator.

PAGE 12 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
DCA-300SSK III — RULES FOR SAFE OPERATION
■ Backfeed to a utility system can cause electrocution and or
property damage. DO NOT connect to any building's electrical
system except through an approved device or after building
main switch is opened. ALWAYS have a licensed electrician
perform the installation
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
DO NOT touch or open any of the below
mentioned components while the
generator is running. Always allow
sufficient time for the engine and generator
to cool before performing maintenance.
Radiator
1. Radiator Cap - Removing the radiator cap while the engine
is hot will result in high pressurized, boiling water to gush
out of the radiator, causing severe scalding to any persons
in the general area of the generator.
2. Coolant Drain Plug - Removing the coolant drain plug
while the engine is hot will result in hot coolant to gush out
of the coolant drain plug, therefore causing severe scalding
to any persons in the general area of the generator.
3. Engine Oil Drain Plug - Removing the engine oil drain
plug while the engine is hot will result in hot oil to gush out
of the oil drain plug, therefore causing severe scalding to
any persons in the general area of the generator.
DANGERDANGER
DANGERDANGER
DANGER :
DANGERDANGER
DANGERDANGER
DANGER :
■ NEVER touch output terminals during operation. This is
extremely dangerous. ALWAYS stop the generator and
place the main circuit breaker in the “OFF” position when
contact with the output terminals is required.There exists
the possibility of electrocution, electrical shock or burn,
which can cause severe bodily harm or even death !
NEVER use damaged
or worn cables when
connecting equipment
to the generator. Make
sure power connecting
cables are securely connected to the generator’s output
terminals, insufficient tightening of the terminal connections
may cause damage to the generator and electrical shock.
Maintenance Safety
■ NEVER lubricate components or attempt service on a running
machine.
■ ALWAYS allow the machine a proper
amount of time to cool before servicing.
■ Keep the machinery in proper running condition.
■ Fix damage to the machine immediately and always replace
broken parts.
■ ALWAYS make sure that electrical circuits are properly
grounded per the National Electrical Code (NEC) and local
codes before operating generator. Severe
injury or death! by
electrocution can result from operating an ungrounded
generator.
■ ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using generator.
■ ALWAYS store equipment properly when it is not being used.
Equipment should be stored in a clean, dry location out of the
reach of children.
■ ALWAYS read, understand, and follow
procedures in Operator’s Manual before
attempting to operate equipment.
DANGERDANGER
DANGERDANGER
DANGER :
DANGERDANGER
DANGERDANGER
DANGER :
POWER
CORD
(POWER ON)
WET
HANDS
NEVER grab or
touch a live
power cord with
wet hands , the
possibility exists
of electrical shock, electrocution, and even
death!

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 13
DCA-300SSK III — RULES FOR SAFE OPERATION
■ NEVER Run engine without air filter. Severe engine
damage may occur.
■ ALWAYS service air cleaner frequently to prevent engine
malfunction.
■ ALWAYS disconnect the negative battery terminal before
performing service on the generator.
■ ALWAYS be sure the operator is familiar with proper safety
precautions when operating the generator set.
■ ALWAYS store equipment properly when not in use.
■ DO NOT leave the generator running in the manual mode
unattended.
■ DO NOT allow unauthorized personnel to operate this
equipment.
■ ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.
■ Refer to the Komatsu Engine Manual for engine technical
questions or information.
Battery
The battery contains acids that can cause
injury to the eyes and skin. To avoid eye
irritation, always wear safety glasses. Use
well insulated gloves when picking up the
battery. Use the following guidelines when
handling the battery:
1. DO NOT drop the battery. There is the possibility of risk
that the battery may explode.
2. DO NOT expose the battery to open flames, sparks,
cigarettes etc.The battery contains
combustible gases and liquids. If
these gases and liquids come in
contact with a flame or spark, an
explosion could occur.
3. ALWAYS keep the battery charged.
If the battery is not charged a buildup of combustible gas
will occur.
4. ALWAYS keep battery charging and cables in good
working condition. Repair or replace all worn cables.
5. ALWAYS recharge the battery in an vented air
environment, to avoid risk of a dangerous concentration
of combustible gases.
6. In case the battery liquid (dilute sulfuric acid) comes in
contact with clothing or skin , rinse skin or clothing
immediately with plenty of water.
7. In case the battery liquid (dilute sulfuric acid) comes in
contact with your eyes, rinse eyes immediately with
plenty of water, then contact the nearest doctor or hospital,
and seek medical attention.
Emergencies
■ ALWAYS know the location of the nearest fire extinguisher
and first aid kit .
Pay close attention to
ventilation when operating
the generator inside
tunnels and caves. The
engine exhaust contains noxious elements.
Engine exhaust must be routed to a
ventilated area.
DANGER:DANGER:
DANGER:DANGER:
DANGER:
Generator Grounding
To guard against electrical shock and possible damage to
the equipment, it is important to provide a good EARTH
ground.
Article 250 (Grounding) of the National Electrical Code
(NEC) provides guide lines for proper grounding and specifies
that the cable ground shall be connected to the grounding
system of the building as close to the point of cable entry
as practical.
ALWAYS be sure to use the ground terminal (green wire)
when connecting a load to the UVWO output terminals.
■ In emergencies always know the location of the nearest phone
or
keep a phone on the job site . Also know the phone
numbers of the nearest
ambulance , doctor and fire
department
. This information will be invaluable in the case
of an emergency.

PAGE 14 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
Figure 3. Typical Generator Grounding Application
DCA-300SSK III — INSTALLATION

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 15
Outdoor Installation
Install the generator in a area that is free of
debris ,
bystanders , and overhead obstructions . Make sure the
generator is on secure level ground so that it cannot slide or
shift around. Also install the generator in a manner so that
the exhaust will not be discharged in the direction of nearby
homes.
The installation site must be relatively free from moisture
and dust. All electrical equipment should be protected from
excessive moisture. Failure to do will result in deterioration
of the insulation and will result in short circuits and grounding.
Foreign materials such as dust, sand, lint and abrasive
materials have a tendency to cause excessive wear to engine
and alternator parts.
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
Pay close attention to ventilation when
operating the generator inside tunnels and
caves.The engine exhaust contains noxious
elements. Engine exhaust must be routed
to a ventilated area.
Indoor Installation
Exhaust gases from diesel engines are extremely poisonous.
Whenever an engine is installed indoors the exhaust fumes
must be vented to the outside.The engine should be installed
at least two feet from any outside wall. Using an exhaust
pipe which is too long or too small can cause excessive
back pressure which will cause the engine to heat excessively
and possibly burn the valves.
Mounting
The generator must be mounted on a solid foundation (such
as concrete) and set firmly on the foundation to isolate
vibration of the generator when it is running. The generator
must set at least 6 inches above the floor or grade level (in
accordance to NFPA 110, Chapter 5-4.1). DO NOT remove
the metal skids on the bottom of the generator. They are to
resist damage to the bottom of the generator and to maintain
alignment.
Generator Grounding
To guard against electrical shock and possible damage to
the equipment, it is important to provide a good EARTH
ground.
Article 250 (Grounding) of the National Electrical Code (NEC)
provides guide lines for proper grounding and specifies that
the cable ground shall be connected to the grounding system
of the building as close to the point of cable entry as
practical.
NEC articles 250-64(b) and 250-66 set the following
grounding requirements:
1. Use one of the following wire types to connect the
generator to earth ground.
a. Copper - 10 AWG (5.3 mm2) or larger.
b. Aluminum - 8 AWG (8.4 mm2) or larger.
2. When grounding the generator (Figure 3) connect the
ground cable between the lock washer and the nut on
the generator and tighten the nut fully. Connect the other
end of the ground cable to earth ground.
3. NEC article 250-52(c) specifies that the earth ground
rod should be buried aminimum of 8 ft. into the ground.
When connecting the generator to
any buildings electrical system
ALWAYS consult with a licensed
electrician.
DCA-300SSK III — INSTALLATION
NOTE

PAGE 16 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
DCA-300SSK III — OPERATION AND SAFETY DECALS
The DCA-300SSK III generator is equipped with a number of safety decals. These decals are provided for operator safety
and maintenance information. The illustration below and on the preceding pages show the decals as they appear on the
machine. Should any of these decals become unreadable, replacements can be obtained from your dealer.

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 17
DCA-300SSK III — OPERATION AND SAFETY DECALS

PAGE 18 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
DCA-300SSK III — GENERAL INFORMATION
DCA-300SSK III FAMILIARIZATION
Generator
The MQ Power DCA-300SSK III series generators are 240
kW generators that are designed as a high quality portable
(requires a trailer for transport) power source for telecom
sites, lighting facilities, power tools, submersible pumps and
other industrial and construction machinery.
Engine Control Panel
The “ Engine Control Panel ” is provided with the following:
z Tachometer
z Water Temperature Gauge
z Oil Pressure Gauge
z Charging Ammeter Gauge
z Engine Warning Display Module
z Engine Speed Switch
z Pre-Heat Button
z Pre-Heat Lamp
z Emergency Stop Button
z Battery Switch
z Auto On/Off Engine Controller
Generator Control Panel
The “ Generator Control Panel ” is provided with the following:
z Output Voltage Adjustment Knob
z Frequency Meter (Hz)
z AC Ammeter (Amps)
z AC Voltmeter (Volts)
z Ammeter Change-Over Switch
z Voltmeter Change-Over Switch
z Panel Light
z Panel Light Switch
z Pilot Lamp
Output Terminal Panel
The “ OutputTerminal Panel ” is provided with the following:
z 3 auxiliary 240/139V output receptacles, 50 amp
z 3 auxiliary circuit breakers 240V @50 amps
z 2 120V GFCI receptacles, 20 amp
z 2 GFCI circuit breakers 120V@ 20amps
Control Box
The “ Control Box ” is provided with the following:
z Main Circuit Breaker 800 amps
z Over-Current Relay
Open Delta Excitation System
The DCA-300SSK III series generators are equipped with
the state of the art " Open-Delta " excitation system. The
open delta system consist of an electrically independent
winding wound among stationary windings of the AC output
section.
The connections of the AVR to the AC output windings are
for sensing only. No power is required from these windings.
The open-delta design provides virtually unlimited excitation
current, offering maximum motor starting capabilities. The
excitation does not have a " fixed ceiling " and responds
according the demands of the required load.
There are four connections of the open delta A, B, C, and D.
During steady state loads, the power from the voltage regulator
is supplied from the parallel connections of A to B, A to D,
and C to D. These three phases of the voltage input to the
voltage regulator are then rectified and are the excitation
current for the exciter section.
When a heavy load, such as a motor starting or a short
circuit occurs, the automatic voltage regulator (AVR)
switches the configuration of the open delta to the series
connection of B to C.This has the effect of adding the voltages
of each phase to provide higher excitation to the exciter
section and thus better voltage response during the
application of heavy loads.
Engine
The DCA-300SSK III is powered by a 4 cycle, water cooled,
air to air after cooled, turbocharged KOMATSU Model
SAA6D125E-2 diesel engine. This engine is designed to
meet every performance requirement for the generator.
Reference Table 2 for engine specifications.
In keeping with Multiquip's policy of constantly improving its
products, the specifications quoted herein are subject to
change without prior notice.
The basic controls and indicators for the DCA-300SSK III
series generators are addressed on the following pages.
Electronic Governor System
The DCA-300SSK III is equipped with an electronic governor
system. It is made up of two parts; an electronic controller
that monitors frequency variation as the load increases and
decreases, and an electronic actuator that controls the engine
throttle. The frequency is regulated at ±0.25 to help protect
sensitive equipment.
Microprocessor Engine Control (MPEC)
The DCA-300SSK III incorporates the use of a microprocessor
engine controller unit (MPEC), which monitors basic engine
functions and also allows the generator to operate in an
unattended mode.

DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03) — PAGE 19
DCA-300SSK III — MAJOR COMPONENTS
Figure 5. Major Components
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PAGE 20 — DCA-300SSK III — PARTS AND OPERATION MANUAL (FEMA) — REV. #1 (05/07/03)
DCA-300SSK III — GENERATOR CONTROL PANEL
Figure 6. Generator Control Panel