Shindaiwa DG37MK-P User manual

OWNER’S AND OPERATOR’S MANUAL
Vertical, Water-Cooled 4-Cycle Diesel Engine
DG37MK-P
X750-025 60 3
X750801-460 3
CAUTION
Do not operate the Generator, or any other appliance, before you have read and
understood the instructions for use and keep near for ready use.

Introduction
Thank you for purchasing this Shindaiwa soundproof diesel engine generator.
Thismanualhas beencreatedto ensuresafeusageof thisgenerator. Besure toreadthis
manualbeforeoperation. Improperoperation/handling ofthis generator will resultin anaccident
or malfunction.
Handling/Operationof thisgenerator canonlybeperformed bypersonswho understandthe
contentsof thismanualandcanhandle/operatethegeneratorinasafemanner. Personswho
suffer from an illness, are taking medicineor not feeling way such that safe operation would be
negativelyaffectedmustnot operate this generator.
Workperformed using thisgeneratorand handling/operation of thisgeneratormust bein
accordance with corresponding laws and regulations based on suchlaws. Consultwith the
authorized distributor where this generator was purchased if you have any inquiriesregarding the
corresponding laws.
Always be sure to include this manual when loaning out this generator andinstruct operating
personnelto readthis manualbeforeoperation.
Store this manual in a specified location where it will be secure and available for consulting at any
time. Order another copyfrom theauthorizeddistributor wherethis generator was purchasedif
this manual becomesdusty, grimy ortorn.
Consult withtheauthorizeddistributor where thisgeneratorwas purchased if you haveany
inquiries regardinganypointsrelatedtothis generator andmanual.
Wheninquiringaboutthisgenerator, be sure toprovidethemodel name and serial number.
If disposing of thisgenerator, do so in a manner that is in compliancewith laws related to
industrial waste. Contact the authorized distributor where the generator was purchasedif you
haveanyinquiriesregardingproper disposal.
Cautionnoticeranks inthismanualareclassifiedas follows.
WARNING : Indicates a potentially hazardous situation which, if not
avoided, can result in death or serious injury
CAUTION : Indicates a potentially hazardous situation which, if not avoided,
canresult inminoror moderateinjury andpropertydamage.
< Note> : Othertypes of cautions and indications.
Notethat CAUTION itemscan also lead to major accidents under somecircumstances if
notcorrectly followed.
All caution notices areimportant. Be sure tofollowallof them.

1
Table of Contents
1. Safety Instructions ..........................................................................2
2. Specifications................................................................................... 5
2-1. Specifications............................................................................5
2-2. Ambient Conditions...................................................................6
3. Applications..................................................................................... 6
4. Part Names.......................................................................................6
4-1. External View/Part Names ........................................................6
4-2. Operation Panel Part Names ....................................................8
4-3. Output Panel.............................................................................9
5. Equipment...................................................................................... 10
5-1. Warning Indicators ..................................................................10
5-2. Meters and Gauges................................................................. 11
5-3. Fuel Piping Switch (3Way Fuel Valve).....................................14
6. Transporting/Installing.................................................................. 15
6-1. Transport Procedures.............................................................. 15
6-2. Installation Procedures............................................................ 16
7. Load Connections ......................................................................... 16
7-1. Load Cable Selection.............................................................. 16
7-2. Connecting Load Cables.........................................................17
7-3. Earth Leakage Relay and Grounding......................................17
8. Pre-Operation Inspection.............................................................. 19
8-1. Checking Engine Oil................................................................ 19
8-2. Checking Coolant....................................................................20
8-3. Checking the Fan Belt............................................................. 21
8-4. Checking the Fuel ................................................................... 21
8-5. Checking the Spill Containment ..............................................22
8-6. Checking for Fuel, Oil and Coolant Leaks...............................22
8-7. Checking the Battery...............................................................22
9. Operating Procedures................................................................... 23
9-1. Initial Startup/Pre-Check.......................................................... 23
9-2. Procedures during Operation .................................................. 24
9-3. Stopping Operation ................................................................. 25
9-4. Protective Functions................................................................25
9-5. Connecting with External Fuel Tank........................................ 26
10. Inspection/Maintenance................................................................ 27
11. Long-Term Storage........................................................................ 36
12. Troubleshooting............................................................................. 37
13. Generator Circuit Diagram............................................................ 40
14. Engine Electrical Circuit Diagram................................................ 41

2
1. Safety Instructions
WARNING : SUFFOCATION FROM EXHAUST FUME
Do notoperatethegeneratorinpoorlyventilatedareas such asindoorsortunnels,as theexhaust
gasof the enginecontainssubstancesthat are harmfultohuman health.
Do not direct exhaustfumes atpedestrians orbuildings.
WARNING : ELECTRIC SHOCK
Do not operatethe equipment with anydoorsor covers open.
Before connecting or disconnecting the load cables to/from theoutput terminal, always turn the
outputcircuitbreakerstothe OFF position,stoptheengine, andremovetheenginekey.
Closethe outputterminalcoverbefore operating.
Do not insert apin, wireor othermetalobjectintotheelectricaloutlet.
Do nottouchthegenerator iftheAlternator orcasing becomeswetduringoperation.
Do nottouch outputterminalsor internalelectric partswhilethegenerator isoperating.
Groundtheeveryearthgroundingterminaltothe earthasset outinthemanual.
If even one of all is unconnected by mistake or accident, it will be much more dangerousfor
humanbodythanthe NO-RELAYcase, because leaking current inevitablygoes through the
body.
Eventhoughalltheearthterminalsof theloadshavebeengroundedto theearth,the bonnet
groundingterminalshould begroundedtotheearth.
There is always a danger of being electrocuted byshort-circuit. Be suretotest generator’s
insulationresistance periodically.
Grounding should bemade after the engine is stopped.
Whenever the Earth leakage breaker is activated, you should always repair the leaking placefirst
of all.
WARNING : INJURY
Closeall doors andlockthemduringoperation.
Closeall doors and place locks during operating thisequipment,toavoid injuries by
unintentionally touching cooling fanand fan belt.
Before performing anyequipment check ormaintenance,stop the engine, and remove the
enginekey.Apersonperformingthemaintenance should alwayskeepthe key.
Usethe lifting hook to lift the machines, anddo not lift up the unit using tie-downs. Use of such
couldresult inthegeneratorfalling.
Do not liftany additional weight suchas fueltanks or trailers.
No persons should beundera liftedgenerator.
Before turningthecircuitbreakertoON position, ensurethat the breaker ortheswitch ofloads
arepositionedto OFF.
Operate the circuitbreaker, well-communicating withthe electrician by the load side.

3
CAUTION : EYE/SKIN INJURY
Wear rubbergloves and other protective wearto protect eyes, skin and clothing from the battery
fluid which contains diluted sulfuricacid. If the batteryfluid contactseyesor skin,wash out
immediately witha sufficient amountof cleanwater. Besuretoreceive medical treatment,
especiallyif thefluidcontactstheeyes.
CAUTION : EXPLOSION
Never use or rechargethe batteryif the fluid level is belowtheminimum level.
Do not createsparks or bring flame nearthe battery as it generates flammable gas.
CAUTION : FIRE
Do not bring flammable items(suchas fuel, gas and paint) or items that arehighlycombustible
nearthegeneratoras themuffler, exhaustgasand other parts become extremelyhot.
Keepthisgenerator1m ormorefrom wallsor other hindrances,andonalevelsurface.
Do not connect thegenerator outputtoindoor wiring.
Thisgenerator usesdiesel fuel.Alwaysbe suretostop the engineandnotbringflamesclose
when inspecting fuelor refueling. Waituntiltheenginehascooledbefore performingsuch
procedures.
Do not use this equipment when leak is found, and repair the leaking location before operating.
Always be sure to wipe up any spilled fuelor oil.
Allowthe generator to coolbefore covering withthe protective cover.
Never allowflametocomecloseto thegenerator.
CAUTION : BURNS
Do nottouchtheengineandsurrounding components immediatelyafterstoppingthe equipment,
whiletemperature canreach extremelyhigh.
Do not openthe radiator cap immediately after stopping the engine,toavoid sustaining burns
from hot vapor.
Hotsteam gushes out from the coolant sub-tank if thegenerator overheats. Donot touchthe
coolant sub-tank.
Always be sure to stopthe engine and allow the engine to cool when performing inspection or
maintenance of engineoil. Opening the oillevel indicator or oilfiller cap during operation will result
in hot oilcause personalinjury.
CAUTION : INJURY
Always be sure to use lifting hooks whenmoving thegenerator, and lift it slowly at a completely
verticalangle.
Personnel performing lifting work must wear protective gear such as helmets,safety shoes and
gloves.
Remove thewoodties if using anchors to secure thegenerator.
Position thegenerator on a level stable surfaceso that it cannot slide or move in any manner.
Before starting operation, always be sure to turnoff allswitches of equipment usingthegenerator
andallbreakers toOFF.
Do not move the generator during operation.
Do not operatethegenerator ifit has beenmodifiedor anypartshavebeenremoved.

4
CAUTION : PROPERTY DAMAGE
If using this generator for medical equipment,check before use withthe medicalequipment
manufacturer,doctor, hospitalorsimilar entity.
Check that the generatoroutput setting, output terminal connection and load powersourceare
consistent.
Cable burnout can occur due to generated heat if the loadcurrent exceeds the allowable current
of the cable.
Thevoltage drop between cables is large if the cable is excessivelylong or thin, resulting in
decreased input voltage to equipment usingthegenerator, therebycausing decreased
performance, faultyoperationand malfunction.
Warning/Caution Label Locations
If warning or caution labels become damaged and difficult to read, replace with new labels in
the indicated locations. Order labels using part number indicated in the parenthesis.

Injury
(Part no. : X505-007550)

Caution: gm spec LLC
(Part no. : X505-007840)

Caution: fire
(Part no. : X505-007650)

Injury
(Part no. : X505-010350)

Injury
(Part no. : X505-007820)

Danger caution
(Part no. : X505-007571)

Burn
(Part no. : X505-007830)

Electric shock
(Part no. : X505-007560)

Spill containment bolt
(Part no. : M707-000380)

5
2. Specifications
2-1. Specifications
Model
Unit
DG37MK-P/ANZ
Alternator
Generating Type
-
Rotating Field, Brushless 3-Phase
Synchronous Alternator
Rated Output
kVA
37
kW
29.6
Rated Voltage
V
415
Rated Current
A
51.5
Rated Frequency
Hz
50
Winding
-
3-Phase, 4-Wire
Power factor
%
80
Insulation class
-
F
Excitation
-
Self-Excitation(Brushless)
No. of poles
-
4
Engine
Types
-
Vertical Water-Cooled 4-Cycle Diesel Engine
Model (Manufacturer)
-
V3800DI-T (KUBOTA)
No. of Cylinders (bore x stroke)
mm
4 (100 X 120)
Continuous rated output
kW
33.1
PS
45.0
Rated speed
min-1
1500
Displacement
L
3.769
Combustion system
-
Direct Fuel Injection with Turbo Charger
Cooling method
-
Radiator
Lubricating method
-
Forced Lubrication
Starting method
-
Electric Start
Fuel
-
Diesel Fuel （ASTM No. 2-D）
Lubricant oil
-
CF class
Fuel tank capacity
L
360
Lubricant volume (Full)
L
13.2
Cooling water volume
L
12.5
Starting motor capacity
V-kW
12 –3.0
Charging dynamo capacity
V-A
12 - 30
Battery
-
80D26R
Unit
Length
mm
1750
Width
mm
880
Height
mm
1795
Dry Weight
kg
1190
Installed Weight
kg
1520

6
Emergency Stop Button
Lifting Hook
Tie-Down
Tie-Down
Operation Panel Door
Fuel inlet
Fuel Drain plug
Spill Containment Drain valve
Spill Containment Drain plug
2-2. Ambient Conditions
Use this generator in ambient conditions as described below. Failure to provide these
conditions can result in problems such as malfunction, insufficient output and reduced
durability.
■Ambient temperature: -15 to 40 degree Celsius
■Relative humidity: 85% or less
■Elevation: 300 m or less
3. Applications
Power source for submerged pumps and similar civil engineering equipment
Power source for lighting and similar equipment
Power source for electrical tools and household appliances
4. Part Names
4-1. External View/Part Names
CAUTION : PROPERTY/SECONDARY DAMAGE
Do not use for any application other than those listed above.
If using this generator for medical equipment, check before use with the
medical equipment manufacturer, doctor, hospital or similar entity.

7
Accessories
Owners
Manual
Engine Key (2 pieces)
Tie-Down
Coolant Sub-Tank
Engine Check Door
Oil Level Indicator
Oil Filter
Oil Filler
Coolant Drain plug
Oil Drain plug
3way fuel valve
External Tank Fuel Return
External Tank Fuel Inlet
Water Separator
Fuel Filter
Battery
Alternator Check Door
Radiator Plate
Radiator
Oil Separator
* Shown with side-plate removed.
Air Cleaner
Tie-Down

8
4-2. Operation Panel Part Names
①
Circuit Breaker
⑪
Panel Light
②
Voltmeter
⑫
Starter Switch
③
Ammeter
⑬
Voltmeter Selector Switch
④
Frequency Meter
⑭
Ammeter Selector Switch
⑤
Water Temperature Gauge
⑮
Voltage Regulator
⑥
Fuel Gauge
⑯
Throttle Switch
⑦
Hour Meter
⑰
Panel Light Switch
⑧
Pilot Lamp
⑱
Battery Isolator
⑨
Monitor Lamp
⑲
Emergency Stop Button
⑩
Preheat Lamp

9
3-Phase Breaker (32A)
3-Phase ELCB
1-Phase ELCB
1-Phase
Receptacle
(15A)
3-Phase Receptacle
(32A)
3-Phase Receptacle
(20A)
3-Phase Breaker (20A)
1-Phase Breaker (15A)
4-3. Output Panel

10
5. Equipment
5-1. Warning Indicators
This generator is equipped with the following warning indicators: CHARGE (battery charge),
OIL PRESS (engine oil pressure), WATER TEMP (coolant temperature), OVER SPEED
(engine overspeed), AIR FILTER (air cleaner clogging), and SPILL CONTAINMENT (spill
containment amount). An indicator lights up if a malfunction/fault occurs during operation
and the engine automatically stops depending on the fault type. Moving the starter switch
from STOP to RUN causes the following indicators to light up for approximately 0.5 sec.:
OIL PRESS, and WATER TEMP.
(1)WATER TEMP (Coolant Temperature) Warning Indicator (High Water Temp.)
CAUTION: BURNS
Do not open the radiator cap immediately after stopping the engine.
Do so will result in hot steam gushing out.
Hot steam gushes out from the coolant sub-tank if the generator overheats. Do
not touch the coolant sub-tank.
If the coolant temperature rises above 110℃during operation, the WATER TEMP and
ENGINE warning indicators light up, and the engine automatically stops. If this occurs, hot
steam will gush out of the coolant sub-tank. Check the coolant sub-tank coolant level after
the generator cools and add coolant to the coolant sub-tank if it is insufficient. (Refer to
section “8-2. Checking Coolant”.) If the coolant is at the specified amount, it is probable
that the fan belt is loose or there is a coolant leak. Wait for the engine to cool and inspect
for these problems.
< Note>
The coolant temperature cannotbe detected if thecoolant levelisexcessively low.Alwaysbe
sure to check the coolant level in theradiator coolant sub-tank before starting work.
WARNING : INJURY
Close all doors and place locks during operation, to avoid injuries by
unintentionally contact with moving parts such as the cooling fan and fan belt.
Before performing any equipment check or maintenance, stop the engine, and
remove the engine key. A person performing the maintenance should always
keep the key.
CAUTION : BURNS
Do not touch the engine and surrounding components immediately after
stopping the equipment, while temperature can reach extremely high.

11
(2) OIL PRESS (engine oil pressure) Warning Indicator (Low Oil Press.)
CAUTION: BURNS
Always be sure to stop the engine and allow the engine to cool when
performing inspection or maintenance of engine oil. Opening the oil gauge or
oil filler cap during operation will result in hot oil gushing out.
If the engine oil pressure drops below 0.49 x 100 kPa (0.5kgf/cm2) during operation, the
OIL PRESS and ENGINE warning indicators light up, and the engine automatically stops.
If this occurs, check the engine oil level and add engine oil until it reaches the maximum
level.
< Note >
Thisoilpressure warning indicator cannot detect oil deterioration. Change the engine oil
periodically. (Refertosection “8-1. Checking Engine Oil”.)
(3) OVER SPEED (Engine Overspeed) Warning Indicator
This generator is equipped with a function such that the engine is automatically stopped
if an engine fault occurs causing the engine speed to increase excessively. If the engine
speed rises above 2070 rpm during operation, the OVER SPEED and ENGINE warning
indicators light up, and the engine automatically stops. If this occurs, it is probable that
some malfunction has occurred in the engine. Contact the authorized distributor where
the generator was purchased.
(4) CHARGE (Battery Charge) Warning Indicator (Low Battery Voltage)
The BATTERY warning indicator lights up when charging is not possible during operation.
If charging is not possible and the battery voltage drops below 8 V, the ENGINE warning
indicator also lights up and the engine automatically stops. If this occurs, contact the
authorized distributor where the generator was purchased.
< Note >
This battery charging warning indicator cannot detectbatterydeteriorationor insufficient
batteryfluid.(Refertosection “8-7. Checking the Battery”.)
(5) AIR FILTER (Air Cleaner Clogging) Warning Indicator
The AIR FILTER warning indicator lights up if the air cleaner element becomes clogged
during operation. If it lights up, immediately stop the engine and clean or replace the air
cleaner element. (Refer to section “10. Inspection/Maintenance (3) Air Filter Element
Cleaning/Replacement”.)
(6) SPILL CONTAINMENT (Spill Containment Amount) Warning Indicator
The SPILL CONT warning indicator lights up if the liquid stored in the spill containment
exceeds approximately 28L during operation. If it lights up, immediately stop the
engine and flush the liquid stored in the spill containment.
(Refer to section “10. Inspection/Maintenance (8) Flushing Liquid in Spill Containment”.)
5-2. Meters and Gauges
Engine Meters and Gauges
(1) Hour Meter
Displays the operating time. Use this to schedule periodic inspection. Be
careful as the hour meter operates when the starter switch is at RUN
regardless of whether the engine is running or stopped.

12
(2) Water Temperature Gauge
Water Temperature Gauge displays the temperature of engine coolant.
Normal temperature may vary depending on the environment, but it should
be between 75 to 90 degrees Celsius.
< Note >
If thetemperature exceedsnormal value, disconnect theload,idle the engine
at 1000min-1,andwait untilthereadingfallstothenormaltemperaturerange.
(3) Fuel Gauge
It shows the volume in the fuel tank.
When filled up, it shows 『F』.
When the hand is approaching to『E』, the volume is coming to
empty. Replenish fuel enough promptly.
Generator Meters and Gauges
(1) Voltmeter
Voltmeter displays the output voltage (Phase to Phase) from
the generator.
Please check and confirm it showing 415V at 50Hz during operation.
(2) Ammeter
Ammeter displays the output current (Phase) from the generator.
(3) Frequency Meter
Frequency Meter will display the frequency of the generator.
Please check it showing 50Hz during operation.
Lamps
(1) Preheat Lamp
When the starter switch is turned to <Preheat> position, the preheat lamp
will be turned ON. The preheat lamp will be turned OFF after preheating
completes showing the engine start possible.
< Note >
Preheatingtimevariestocoolanttemperature, usuallyabout3-10 seconds.
(2) Panel Light
Panel light turns ON to illuminate the panel, when turning the switch
(by the light) to ON.

13
3P Breaker
1P Breaker
RESET
STOP
Switches
(1) Starter Switch
①Stop
When the switch is set to this position, all power will be off.
The switch must be set to this position to remove the key.
②Run/Preheat
The switch must be set to this position during operation.
This position is also used during cold season, to preheat GlowPlug.
< Note >
Do notleavetheswitchtothisposition, whilethe engine isstopped.
Otherwisethebatteryis discharged.
③Start
This position is to start the engine. When the key is released,the
setting will automatically return to <RUN/PREHEAT> position.
(2) Emergency Stop Button
This button is used to stop the engine in emergency.
By inserting the button, the engine stops.
Be sure to restore the starter switch to STOP and re-set the button,
turning clockwise after using the emergency stop button.
(3) Circuit Breaker
By turning this circuit breaker on the control panel to ON,Power will be
transferred to the output receptacles and to the load side.
The breaker trips to OFF, either overload or short-circuit.
(4) Volt Meter Selector Switch
By changing the switch, the voltmeter displays the voltage
between the lines.
(5) Ampere Meter Selector Switch
The phase current displays in the meter, by switching to each
phase (R, S and T) position.
(6) 3-Phase Circuit Breaker,1-Phase Circuit Breaker
< Note >
Do not usethisbreakerastheON/OFFswitchtotheload.

14
(7) 3-Phase Earth Leakage Circuit Breaker (3P ELCB)
1-Phase Earth Leakage Circuit Breaker (1P ELCB)
Each receptacle, 3-Phase and 1-Phase is incorporated
with ELCB respectively.
When current leak occurs, it trips to stop power
transmission to load.
< Note >
Do not use this breaker as theON/OFF switch to the load
(8) Battery Isolator
When turning the switch to OFF, the engine electric
circuit does not activate due to no battery power.
Voltage Regulator and Throttle Switch
(1) Voltage Regulator
The dial adjusts generator output voltage.
By turning the dial clockwise, an operator can increases the voltage.
By turning the dial counter-clockwise, an operator can decrease the
voltage.
(2) Throttle Switch
The switch is to change engine speed (revolution). Turn the switch to
[IDLING] when engine start, warm-up or cool-down, and turn to [RUN]
when using the equipment at the rated speed (50Hz).
5-3. Fuel Piping Switch (3Way Fuel Valve)
CAUTION : FIRE
Always make sure that the engine is stopped when working on piping.
Always be sure to wipe up any spilled fuel.
After working on the piping, check that there is no fuel leakage.
Change the three-way fuel valve to switch to supply fuel from the external tank. In that
case, the internal fuel tank is not used.
(1) If using the internal fuel tank
The three-way fuel valve is turned to the “A” side when the generator is shipped from the
factory.
OFF position
ON position
3P ELCB
1P ELCB

15
< Note >
When disconnecting piping from the external tank, turn the lever to the “A” side, andattachthe
bundledplug(R1/2”)totheexternal tankfuel inlet/return.
(2) If using an external fuel tank
Connect hoses from the external fuel tank to the
external fuel inlet and the external fuel return.
Change the lever of the 3way fuel valve to the “B”
side to supply fuel from the external tank.
(Refer to “9-5. Connecting an External Fuel Tank”
for corresponding procedures.)
6. Transporting/Installing
6-1. Transport Procedures
WARNING : INJURY
Do not lift up the unit using tie down. Use of such could result in the generator falling.
No persons should be under a lifted generator.
CAUTION : INJURY
Always be sure to use lifting hooks when lifting up the generator, and raise it
slowly at a completely vertical angle.
Personnel performing lifting work must wear protective gear such as helmets,
safety shoes and gloves.
Do not move the generator during operation.
(1) Lifting Procedures
Always be sure to use lifting hooks when lifting up the generator, and raise it slowly at a
completely vertical angle.
(2) Transport
When transporting this generator, tie rope to the left and right tie downs, and securely fix
the generator.
< Note >
Handle this generator with great care when raising, lowering and transporting. Roughhandling of
generatorcan resultin damageormalfunction.
Before transporting, checkthe inside of the spill containment and drain anyaccumulated liquid.
Lifting
Hook
Tie-Down
3Way Fuel
Valve
External Fuel
Return
External Fuel
Inlet

16
6-2. Installation Procedures
WARNING : SUFFOCATION FROM EXHAUST FUME
Do not operate the generator in poorly ventilated areas such as indoors or
tunnels, as the exhaust gas of the engine contains substances that are
harmful to human health.
Do not direct exhaust fumes at pedestrians or buildings.
CAUTION : FIRE
Do not bring flammable items (such as fuel, gas and paint) or items that are
highly combustible near the generator as the muffler, exhaust gas and other
parts become extremely hot.
Keep this generator 1m or more from walls or other hindrances, and on a
level surface.
Remove the wood ties if using anchors to secure the generator
Do not connect the generator output to indoor wiring.
If installing this generator, set up barriers or fencing completely around the boundary
line of the construction area and take measures to prevent persons not involved in the
construction from entering the area.
Always set the generator on a hard, flat and leveled surface that serves as the
foundation.
Keep the generator 1 m or more from walls or other hindrances so that the operation
panel door and left/right check doors are accessible for internal inspection/maintenance.
< Note >
This equipment must beoperated onhardandflatsurface. Operatingunder anyother
conditionsmayresult inmalfunctions.
Donotblocktheairflowfromradiatorvent or mufflerexhaust.It mayresult in reduced
engineperformance, overheating, ordamagetotheelectricalparts.
Operating in dusty areaorsalty air (by the ocean), or any other particulate environment
may result incloggedradiator, which may causeoverheating, other malfunctions and insulation
deterioration. Useextremecare,frequentchecks andmaintenance.
7. Load Connections
7-1. Load Cable Selection
CAUTION : PROPERTY DAMAGE
Cable burnout can occur due to generated heat if the load current exceeds
the allowable current of the cable.
The voltage drop between cables is large if the cable is excessively long or
thin, resulting in decreased input voltage to equipment using the generator,
thereby causing decreased performance, faulty operation and malfunction.
Select cable for use that has sufficient thickness and an allowable current possible for use,
giving consideration to the distance from the generator to the equipment using the
generator.
< Note >
Select cable with a thicknessthat ensures that the voltage drop across thecable will be within 5%
of the rated voltage.

17
Expedient Formula: the voltage drop of cables
3-Phase 3-Wire
1-Phase 2-Wire
7-2. Connecting Load Cables
WARNING : ELECTRIC SHOCK
Before connecting or disconnecting the load cables to/from the output
terminal, always turn the output circuit breakers to the OFF position, stop the
engine, and remove the engine key.
The person performing the maintenance should always keep the key.
Close the output terminal cover before operating.
Do not touch the generator if the Aiternator or casing becomes wet during
operation.
CAUTION : FIRE
Do not connect the generator output to indoor wiring.
< Note >
Divideloads into3 circuitsproportionally aspossible, whenusing themaximum output power
especially,andconnectthemto eachphase(R,S,T)respectively.
Becarefultolimitthe current undertheratedcurrent per the phase.
Note that the 1-phase output power decreaseswhen 3-phase output power is used
simultaneously.
Be careful to limit the totalcurrent under the ratedoutput current when using 1-Phase and
3-Phaseoutputsimultaneously.
7-3. Earth Leakage Relay and Grounding
WARNING : ELECTRIC SHOCK
Ground the every grounding terminal to the earth as set in the manual.
If even one of all is unconnected by mistake or accident, it will be
much more dangerous for human than the NO-RELAY case,
because leaking current inevitably goes through the body.
Even though all the bonnets of the loads have been grounded to the earth, the
bonnet grounding terminal should be grounded to the earth.
Grounding should be made after the engine is stopped.
Whenever the Earth leakage breaker is activated, you should always repair
the leaking place first of all.
The generator is provided with the earth leakage breaker relay to detect any leakage
produced due to such the trouble as insulation failure of the load while the generator is
running and to cut off the circuit for protection against any accident such as electrical shock
resulting from the trouble.The specification of the earth leakage relay ;
Rated Sensitive Current: 30mA (or below) (Grounding resistance: 500Ω or below)
Sensitive time: Within 0.1 second.
2(A)Current
(mmDia (m)Length
58
1
(V)DropVoltage 2 )
3(A)Current
(mmDia (m)Length
58
1
(V)DropVoltage 2 )