WhisperPower W-SQ-Pro User manual

USERS MANUAL FOR MOBILE APPLICATIONS
W-SQ-Pro
15kVA/10.8kW • 18kVA/15.5kW
1500 RPM
Mobile diesel generating set 230/400V-50Hz
Three phase, 5 wire Digital Diesel Control
WHISPERPOWER BV
Kelvinlaan 82
9207 JB Drachten
Netherlands
Tel.: [phone]
Fax.: [phone]
www.whisperpower.com
V1 Feb 2020

TABLE OF CONTENTS
2 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
TABLE OF CONTENTS:
1 INTRODUCTION ............................................................................................................................................................... 4
1.1 General ............................................................................................................................................................... 4
1.2 Service and maintenance .................................................................................................................................... 4
1.3 Guarantee ........................................................................................................................................................... 4
1.4 Liability ................................................................................................................................................................ 5
1.5 Identification ........................................................................................................................................................ 5
1.5.1 General .............................................................................................................................................. 5
1.5.2 Identification plate .............................................................................................................................. 5
2 INFORMATION ................................................................................................................................................................. 7
2.1 Safety .................................................................................................................................................................. 7
2.1.1 General .............................................................................................................................................. 7
2.1.2 Electrical safety .................................................................................................................................. 7
2.1.3 Earth insulation failures ...................................................................................................................... 7
2.1.4 Installation .......................................................................................................................................... 7
2.1.5 Operation ........................................................................................................................................... 8
2.1.6 Fire and explosion .............................................................................................................................. 8
2.1.7 Chemicals .......................................................................................................................................... 8
2.2 Transport, lifting and storage .............................................................................................................................. 9
2.3 The W-SQ12 ....................................................................................................................................................... 9
2.3.1 Features ............................................................................................................................................. 9
2.3.2 Remote control ................................................................................................................................... 9
2.3.3 Documentation ................................................................................................................................... 9
2.4 Components ...................................................................................................................................................... 10
2.4.1 Main components to identify ............................................................................................................ 10
2.4.2 Generator control panel ................................................................................................................... 12
2.4.3 Remote control panel ....................................................................................................................... 12
2.5 Technical Information ........................................................................................................................................ 12
2.5.1 AC alternator .................................................................................................................................... 12
2.5.2 Engine .............................................................................................................................................. 13
2.5.3 Digital Diesel Control system ........................................................................................................... 13
2.5.4 Battery charger ................................................................................................................................. 13
2.5.5 Alarms and shut down ...................................................................................................................... 13
2.5.6 Monitoring ........................................................................................................................................ 13
2.5.7 Control .............................................................................................................................................. 13
2.5.8 Remote control ................................................................................................................................. 13
2.5.9 Hour counter .................................................................................................................................... 13
2.5.10 Load indicator ................................................................................................................................... 13
2.5.11 Fuel specification ............................................................................................................................. 13
2.5.12 Oil information .................................................................................................................................. 13
2.5.13 Cooling liquid .................................................................................................................................... 14
2.5.14 Technical data .................................................................................................................................. 15
2.5.15 Wiring codes and colours ................................................................................................................. 16
2.5.16 Lay out control wiring ....................................................................................................................... 17
2.5.17 Electrical diagrams AC connections (alternator models with 6 wires) .............................................. 19
2.5.18 Electrical diagrams AC connections (alternator models with 12 wires) ............................................ 20
2.5.19 Electrical diagram radiator fan connection ....................................................................................... 22
2.5.20 Diagram electronic governor (standard) ........................................................................................... 23

EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 3
3 OPERATION ................................................................................................................................................................... 24
3.1 General ............................................................................................................................................................. 24
3.2 Operating Instructions ....................................................................................................................................... 24
3.2.1 Summarised operating instructions (daily use) ................................................................................ 24
3.2.2 Extended operating instructions ....................................................................................................... 24
4 MAINTENANCE .............................................................................................................................................................. 26
4.1 Alternator ........................................................................................................................................................... 26
4.2 Engine ............................................................................................................................................................... 26
4.2.1 Preliminary instructions .................................................................................................................... 26
4.2.2 Bleeding fuel lines ............................................................................................................................ 26
4.2.3 Valve clearance ................................................................................................................................ 26
4.2.4 Replacing fuel filter ........................................................................................................................... 27
4.2.5 Replacing oil filter ............................................................................................................................. 27
4.2.6 Readjustment V-beltplacing oil filter ................................................................................................. 27
4.2.7 Air filter element ............................................................................................................................... 27
4.2.8 Air strainer element .......................................................................................................................... 27
4.3 Regular maintenance ........................................................................................................................................ 28
4.3.1 Maintenance schedule ..................................................................................................................... 29
4.3.2 Putting out of service ........................................................................................................................ 29
5 TROUBLE SHOOTING ................................................................................................................................................... 30
5.1 Alternator/ electrical faults ................................................................................................................................. 30
5.1.1 General ............................................................................................................................................ 30
5.1.2 Trouble shooting table alternator ..................................................................................................... 31
5.2 Engine faults ..................................................................................................................................................... 32
5.2.1 General ............................................................................................................................................ 32
5.2.2 Trouble shooting table engine .......................................................................................................... 33
5.2.3 Warnings .......................................................................................................................................... 35
5.2.4 Service address ............................................................................................................................... 35
5.3 Special procedures alternator ........................................................................................................................... 36
5.3.1 Automatic voltage regulator ............................................................................................................. 36
5.3.2 Residual voltage check / excitation procedure (flashing) ................................................................. 36
5.3.2 Testing rotary rectifier diodes ........................................................................................................... 37
5.3.3 Winding resistant values .................................................................................................................. 37
5.3.4 Meggering ........................................................................................................................................ 37
5.4 Special procedures engine ................................................................................................................................ 38
5.4.1 Setting the RPM ............................................................................................................................... 38
5.4.2 Adjusting valve clearance and retightening the cylinder head bolts. ................................................ 38
5.4.3 Disassembling instructions ............................................................................................................... 39
6 SPARE PARTS LIST ...................................................................................................................................................... 40
MAINTENANCE LOG ................................................................................................................................................................ 41

INTRODUCTION
4 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
1 INTRODUCTION
1.1 GENERAL
The W-SQ-Pro 15/10.8 Three Phase Mobile Diesel
Generating set is manufactured and marketed by Whisper
Power.
It is important to read this manual before installing and
operating the generating set. Both safety and durability rely
very much on the correct identification, installation and a
good understanding of ratings, features, design,
maintenance and operation procedures.
The information, specifications, illustrations and statements
contained within this publication are given with our best
intentions and are believed to be correct at the time of going
to press.
All of the specifications, provisions and instructions
contained in this manual apply solely to standard versions
of the W-SQ-Pro 15/10.8 generating set.
This manual is valid for the following models:
Part number
Description
41207320
W-SQ 15/10.8 PRO 230- 400 V / 50 Hz
3phase, 1500rpm dry exhaust
41208320
W-SQ 18/15.5 PRO 230 – 400 V / 50
Hz, 3 phase, 1500 rpm dry exhaust
See 1.5 for identification of the generator set. For other
models see other manuals available on our website:
www.whisperpower.com.
Our policy is one of continued development and we re-serve
the right to amend any technical information without prior
notice.
Whilst every effort is made to ensure the accuracy of the
particulars contained within this publication neither the
manufacturer, distributor, or dealer in any circumstances
shall be held liable for any inaccuracy or the consequences
thereof.
WARNING
A warning symbol draws attention to special
warnings, instructions or procedures which, if
not strictly observed, may result in damage or
destruction of equipment, severe personal
injury or loss of life.
DANGER
This danger symbol refers to electric danger
and draws attention to special warnings,
instructions or procedures which, if not strictly
observed, may result in electrical shock which
will result in severe personal injury or loss of
life.
DANGER
Realise that people are not used to have 230 /
400 Volt available on a vehicle. Put warning
signs on wall sockets and on junction boxes.
Instruct non-regular users of the vehicle. Warn
maintenance personal of garages that do
service on the vehicle.
1.2 SERVICE AND MAINTENANCE
Regular service and maintenance should be carried out
according to the directions in this manual. For service and
maintenance one can appeal to the manufacturer or the
dealers.
1.3 GUARANTEE
Whisper Power guarantees that this generating set has
been built according to good workmanship, according to the
specifications in this manual and according to European
Community safety regulations.
During production and prior to delivery, all of our generating
sets are tested and inspected.
The well functioning of this generating set is subject to
guarantee. The period and conditions of this guarantee are
laid down in the general conditions of delivery as registered
with the Chamber of Commerce and Industries for the North
of the Netherlands number 01120025 and are available on
request. The guarantee period is two years, limited to 1000
running hours. Some aspects of our guarantee scheme are
given here in more detail:
Guarantee does not cover failures that are caused by
misuse, neglect or a faulty installation.
Example 1. Faulty installation:
Overheating of the engine or alternator is the most common
cause of problems with mobile generating sets. These
problems are caused by poor circulation of the cooling liquid
due to wrong routing of the pipes to the radiator: bents will
capture air bubbles causing “air-lockes” blocking the
circulation of the liquid. Other examples of installation
problems are hot air circulation into the radiator and the
radiator fan sucking exhaust gasses into the radiators.

EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 5
The generator and other parts should be protected against
the influences of the weather and splashing water (with dirt
and salt) below the vehicle. Refer to the installation manual
for instructions but remember these are for guidance only
as many factors influence the installation of a generator.
The ultimate responsibility will always be with the owner to
ensure a safe and compliant installation. If in doubt ask!
Example 2: Misuse:
Long term running with no load or too little load can cause
the exhaust to get choked with soot or carbon. Cleaning the
exhaust is not covered by guarantee.
Example 3: Neglect
Whisper generators have an option for an auto start/stop
mode or interval mode.
Whisper Power cannot be held responsible for damage
caused by the unattended running generator.
Guarantee means that faulty parts are repaired or replaced
free of charge. If necessary the whole generator unit will be
exchanged. Labour necessary to complete repairs on board
a vessel executed by an authorized service engineer is
covered, but is limited to a reasonable number of hours and
reasonable rates in relation to the actual repair work that
has to be done.
Travel expenses and travel hours are not covered. Also not
covered is the labour required to take a generator out of a
vehicle or for reinstallation. There is no cover for labour
needed to get access to the generator, for example to
remove equipment or parts of the vehicle body etc.
Goods to be delivered under guarantee will be invoiced.
Only after the faulty goods are returned will the invoice be
credited. Payment in advance may be required or
guaranteed by credit card. If after the faulty goods are
returned, it is indicated that the failure was not covered by
guarantee a credit will not be issued. For example if a
Printed Circuit Board is returned with clear damage caused
by seawater, guarantee will be refused.
Freight costs to deliver spares by normal mail or carriers is
covered under guarantee. Special services like express
mail, overnight delivery etc. are not covered. Taxes and
duties are not covered. For shipments to remote areas any
additional costs incurred over normal carriage will be
invoiced to the customer.
The cost for returning faulty goods is not covered under
guarantee.
If any problem arises which could be subject of guarantee,
procedures should be followed as described in the
guarantee conditions, unauthorised repairs could lead to
further damage and violate the guarantee conditions.
Should work take place, which is not in
accordance with the guidelines, instructions
and specifications contained in this user’s
manual and the supplementary installation
manual, then damage may occur and the
generating set may not fulfil its specifications.
In all these cases the guarantee may become
invalid. Use original spareparts only!
1.4 LIABILITY
Whisper Power does not accept responsibility for damage,
injuries or casualties which are the result of operation of the
generating set in specific conditions which brings dangers
which could not be foreseen, or could be avoided by
additional measures. Whisper Power does not accept
liability for damage due to use of the generator, possible
errors in the manuals and the results thereof.
Automatic start/stop
Whisper Power cannot be held responsible for damage
caused by the unattended running generator using the
auto-start/stop mode or interval mode.
1.5 IDENTIFICATION
1.5.1 General
Before using this generating set it is very important to
identify the set correctly. To communicate for service or
ordering parts it is also essential to correctly identify the
generating set. Also for the daily operation of the genera-
ting set it is necessary that the operator knows the correct
specifications.
1.5.2 Identification plate
All required identification data are on the identification plate.

INTRODUCTION
6 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
Fig. 1: Identification plate.
1 The identity of the generating set is given by the
SERIAL NUMBER.
When this number is available the manufacturer can
trace the specifications of the generating set. On the
identification plate are also some basic features of the
set:
2 POWER
The identification plate gives the nominal maximum
continues load in kVA (= kW) calculated with power
factor one. When calculating a load one should always
take into account the power factor or cos phi of this
load. The power should never exceed the nominal
power as shown on the identification plate. Power is
rated at an ambient temperature of 25ºC. For higher
temperatures the generating set has to be derated. To
drive the radiator fan (230 V or 230/400 V fan) output
could be taken from power generated by the genset. In
that case net power will be less than specified on the
identification plate
3 VOLTAGE shows the nominal voltage.
This voltage should be within the specified tolerance at
the nominal frequency and a balanced load. The W-
SQ-Pro 15/10.8 Three Phase can be connected as 3-
phase 230/400 Volt (STAR) or as 3-phase 230 Volt
(DELTA). The alternator is not designed and rated for
single phase applications. For single phase
applications Whisper Power offers another model that
has dedicated windings. The nameplate indicates the
connection as made in the factory; BE AWARE THAT
THE CONNECTIONS COULD BE RECONNECTED
BY FORMER USERS.
4 FREQUENCY is shown in Hz and is determined by the
speed of the engine (RPM). 50 Hz correlates with 1500
rpm. Whisper Power offers generators for 1800 rpm 60
Hz applications as well. When necessary a W-SQ-Pro
15/10.8 Three Phase model can be reconnected and
set for 60 Hz applications. A 60 Hz special manual is
available upon request.
5 CURRENT shows the maximum current that is
acceptable at the specified frequency, voltage and
power factor. The indicated current is the current
between two phases that can be taken off three times.
6 WEIGHT shows the net dry weight (approximately) in
kg. This is without fuel, oil, cooling liquid, packing and
external installation equipment
7 CE-marking: the “CE” symbol shows that the
generating set is build according to European
Community safety regulations. This includes the
regulations regarding the safety of pleasure craft,
safety of machinery, electric safety and electric
magnetic compatibility (EMC) and other relevant
directives.
Safety also relies on the installation, application and
circumstances. See also the remarks in this manual under
SAFETY. Before changing a factory setting you are advised
to consult the manufacturer. When the generating set you
have to identify is not new you have to take into account the
possibility that former users may have changed the settings.
Check the settings (voltage, frequency, rpm) when there is
any doubt.
380

2 INFORMATION
2.1 SAFETY
2.1.1 General
When correctly installed and used in normal circumstances
this generating set fulfils EC safety regulations. This
generating set could be part of an installation or could be
used in a way that additional regulations of the EC or other
authorities have to be taken into account.
DANGER
Warning signs draw attention to special
warnings, instructions or procedures which, if
not strictly observed, may result in electrical
shock which will result in severe personal injury
or loss of life.
Circumstances could make it also necessary to
take additional measures. Be aware of wet
conditions and hazardous environments
caused by explosive gases etc
2.1.2 Electrical safety
The voltage of 230 / 400 Volt generated by this
generating set is dangerous and if instructions
and procedures are not strictly observed may
result in electrical shock which will result in
severe personal injury or loss of life.
Realise that people are not used to have 230 /
400 Volt available on a vehicle. Put warning
signs on wall sockets and on junction boxes.
Instruct non-regular users of the vehicle. Warn
maintenance personal of garages that do
service on the vehicle.
• Check all wiring at least once a year. Defects, such
as loose connections, burned cables etc. must be
repaired immediately.
• Do not work on the electrical system if it is still
connected to a current source. Only allow changes
in your electrical system to be carried out by
qualified electricians.
• Connection and protection must be done in
accordance with local standards.
• Using the auto-start/stop (interval) mode the
generator can start unexpectedly. When
working on the electrical system, the 3 Amp
fuse must be removed from the control panel
and the battery plus cable must be removed
from the battery.
Warning signs indicate parts which could be
live.
2.1.3 Earth insulation failures
According to local regulations and depending on the
application it could be necessary to take measures for
protection against earth insulation failures.
In the standard delivery “neutral” and “ground” are not
connected. To make a connection between “neutral” and
“ground” could be necessary as part of a specific insulation
failure protection system.
In all situations the transfer switches between
shore, inverter and generator should switch
both neutral (N) and all phase lines (L1, L2 and
L3). Of course this is the case when using a
Mastervolt Mass Systemswitch.
2.1.4 Installation
Whisper generating sets are not self contained and have to
be properly installed in enclosed areas. Installation includes
measures to be taken to outlet exhaust fumes which contain
carbon monoxide and are extremely dangerous. Carbon
monoxide (CO) is an invisible odourless gas. Inhalation
produces headache, nausea or death. Installation includes
measures for proper ventilation, safe electric connections,
safe installation of the starting battery, proper fitting of the
cooling system and fuel pipes etc. Refer to the installation
manual.
Do not use the generator set when the vehicle
is inside a building or in other enclosed area’s.
Be aware using the generator in wind still
conditions, when the exhaust fumes could
accumulate under, around or even in the
vehicle.

INTRODUCTION
8 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
2.1.5 Operation
External moving parts like fans and V-belts are covered by
the soundshield and therefore the W-SQ-Pro 15/10.8 is very
safe when the soundshield is closed.
Nevertheless take note of the signs on the
generating set which show symbols in a
triangle indicating danger.
When service has to be carried out while the
engine is running, be aware of moving parts
like V-belts.
• The generating set should be operated by
authorised personnel only.
• Be aware of hot parts and especially parts of the
exhaust system and the cooling system.
• If the generating set is unsafe, fit danger notices
and disconnect the battery positive (+) lead so that
it cannot be started until the condition is corrected.
• Do not attempt to operate the generating set with
a known unsafe condition. Disconnect the battery
positive (+) lead prior to attempting any repairs or
cleaning inside the enclosure.
• Always consult the manual before carrying out
maintenance.
• Do not change the settings without consulting the
manufacturer. Keep a record of setting changes in
this manual.
2.1.6 Fire and explosion
Fuels can be flammable. Proper handling limits
the risk of fire and explosion.
• Avoid refilling the fuel tank while the engine is
running. When oil or fuel is leaking do not use the
generating set.
• Do not run the engine close to explosives or
gasses.
• Hydrogen gas generated by charging batteries is
explosive. Ensure for proper ventilation. Do not
smoke or allow sparks, flames, or other sources of
ignition around batteries.
• Keep a fire extinguisher on hand.
Fig. 2: Fire extinguisher port.
• In case of fire do not open the soundshield. To
avoid serious injury or death from fire, shut down
engines, generator sets and blowers. Break
through the label which is indicated by BREAK
THROUGH HERE and then immediately
discharge entire contents of gaseous portable fire
extinguisher through the fire extinguisher port. On
the generating set this fire extinguisher port is
indicated by the label as shown in figure 2.
• Poor electrical connections or using wiring which
is not suited for the rated currents can cause
overheating and possibly fire.
2.1.7 Chemicals
• Fuels, oils, coolants, and battery electrolyte can be
hazardous to personnel if not treated properly. Do
not swallow or have skin contact with these liquids.
Do not wear clothing that has been contaminated
by fuel or lubricating oil.
• Gaskets may be manufactured from asbestos.
Particles of this material should not be inhaled as
this may result in fatal diseases.
• On no account allow any unprotected skin to come
into contact with the injector spray as the fuel may
enter the blood stream with fatal results.
• Engines may be fitted with seals or O-rings
manufactured from "viton" or similar material.
When exposed to abnormal high temperatures in
excess of 400°C an extremely corrosive acid is

INFORMATION
EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 9
produced which cannot be removed from the skin.
If signs of decomposition are evident, or if in doubt,
always wear disposable heavy duty gloves.
2.2 TRANSPORT, LIFTING AND STORAGE
When lifting the generating set avoid any risk
of personal injuries, do not stand under the
generating set.
• Use soft slings to avoid damage
• On the engine are two hoist eyes which can be
used to take the generator out of the capsule. They
can also be used to lift the complete generating set
including the capsule.
• After transporting the generating set check for
damage before installation.
• Long term storage can have detrimental effects on
engine and alternator. The engine should be put
through an engine preservation procedure. (Refer
to the maintenance chapter)
• The alternator windings tend to condense. To
minimise condensation, store the generating set in
a dry and warm storage area.
• After removing the generating set from long term
storage perform an insulation check. (Refer to the
alternator maintenance paragraph for procedures)
• While the battery is stored it should be recharged
every 12 weeks.
2.3 THE W-SQ-PRO 15/10.8
2.3.1 Features
This generating set includes a diesel engine which is
connected by close coupling to an alternator in a sound
attenuated capsule. The set is mounted on a steel base
frame and mounted securely on anti vibration mounting
pads to the capsule base. All cables and hoses are guided
through the capsule’s sides. The set is not self contained
and is only operable after proper installation using
additional accessories and installation materials.
Installation accessories are listed in the installation manual
and are available through the supplier of the generating set.
The full automatic Digital Control is based on
microprocessor technology. Several automatic start/stop
functions can be programmed and monitored (refer to
Digital Diesel Control users manual).
2.3.2 Remote control
The full automatic remote control panel including 15 mtr
cable comes as standard with the Whisper generating set.
2.3.3 Documentation
Included in the delivery are:
• This users manual
• An installation manual
• A users manual for DCC (number: 40200261).
• A quick reference guide for DDC (number
40200275)
In this manual there is a list of important parts for
maintenance and spare parts as well as a chapter on
maintenance and problem solving.

INTRODUCTION
10 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
2.4 COMPONENTS
2.4.1 Main components to identify
Fig. 3 Front left view main components W-SQ-Pro 15/10.8 _ 18/15,5 three phase, mobile
Fig. 4: Front right view main components W-SQ-Pro 15/10.8 _ 18/15,5 three phase, mobile
01
Remote control cable
02
AC power output
03
Battery cable
04
08
09
Battery cable
Fuel injector
Accelerator
10
Fuel out
11
Fuel in
12
Oil filter
13
Heat sensor

INFORMATION
EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 11
Fig. 5: Top View main components W-SQ-Pro 15/10.8 _ 18/15,5 three phase, mobile
Fig. 6: Rear view main components W-SQ-Pro 15/10.8 _ 18/15,5 three phase, mobile
16
Raw water pump
17
Rubber engine mounting
18
Filler neck
19
Filler cap engine oil
20
Thermostat cover
21
Coolant water pump
22
V-belt
23
Dynamo
24
Starter motor
25
Manifold

2.4.2 Generator control panel
Fig: 7 Control panel.
Fig. 8: Digital Diesel Control unit
2.4.3 Remote control panel
01
Generator load indicator
02
Failure LED
03
Start button
04
Stop button
05
Display
06
Select button
07
Set button
Fig. 9: Digital Diesel remote control panel
2.5 TECHNICAL INFORMATION
2.5.1 AC alternator
The tri phase synchronous alternator is directly coupled,
one bearing, brushless, rotating field design, 6 or 12 wire
(depending on the alternator model), four pole, (1500 RPM)
and regulated by an Automatic Voltage Regulator (AVR).
The exciter stator has a residual magnetism, which
guarantees self-exciting of the generator on start-up (that
thereby generates a residual voltage of about 10% nominal
voltage).
Fig. 10: Automatic Voltage Regulator (AVR)
The AVR, powered by an auxiliary circuit on the main stator,
acts on the exciter stator indirectly controlling the field
generated by the main rotor by means of the sequence
exciter rotor - diode bridge - main rotor.
The voltage regulator controls and keeps constant the
average voltage of one phase. The voltage setting on the
AVR can be adjusted with the help of a trimmer “V” (See
par.5.3.1)
A frequency control progressively deactivates the machine
when the drive motor speed drops below a pre-set,
adjustable threshold preventing over-excitement at low
operating speeds and abating the load engage effects on
the engine.
The AVR works only within limits of the set frequency 50
Hz. When operating below the lower limit of 46 Hz ± 1 Hz
the AVR will stop regulating to avoid overloading the exciter
coil. When applying the generator set at 60 Hz the AVR is
re-adjustable as well. To operate at 60 Hz the engine RPM
and Digital Diesel Control settings must also be changed.
For the USA market a dedicated manual is available for 60
Hz applications. Please refer to the Whisper Power service
centre for specific instructions to convert the generating set
to 60 Hz. It is not possible to take off the full power from the
W-SQ-Pro 15/10.8 Three Phase by reconnecting the
alternator to single phase (or dual voltage 60 Hz). Whisper
Power offers dedicated single phase and dual voltage 60
Hz generators.
Start / Stop
Remove fuse
Internal fuel pump
Fuse 3A
before mai ntenance
Digital Diesel Control
Fuse 3A
Auxi l i a ry
Fuse 10A
Ext e r na l F ue l P ump
Fuse 3A
Ob s e r v e i n s t r u c t i o n s i n t h e m a n u a l
Repl ace fuses wi th same type and rat ing
Whisper Digital Diesel Operation Unit
04
03
02
01
05
07
06

INFORMATION
EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 13
Fig. 11: AVR Setting-components and terminals
The power comes from 6 or 12 wires (depending on the
alternator model) that can be connected in Star or Delta
arrangements to take off different voltages. For tri phase
230/400V, the alternator should be connected in a Star
arrangement. For three phase 230V, the wires should be
connected in a Delta arrangement.
Further technical data on the connections of the alternator
can be found in drawings and diagrams in this manual. See
section 2.5.17 (6 wires) or section 2.5.18 (12 wires).
2.5.2 Engine
The W-SQ12 generating set is based on the Mitsubishi
S4S2 4 cylinder 4 stroke diesel engine. The engine is
indirectly injected. The engine is water cooled and the
cooling liquid is cooled by a radiator. The engine has been
specially adapted for the Whisper Power application and is
very different from the standard engine supplied for
industrial applications!
2.5.3 Digital Diesel Control system
The standard electrical engine control system is 12 Volt
negative earth, non earth return (ungrounded) is available
as option. Check your identification data to determine which
system is applied. The system is designed according to the
"energise to run" system. The Digital Diesel Control is a very
advanced microprocessor based full automatic system.
Besides automatic start the system offers many monitoring
options. Refer to the separate Digital Diesel Control users
manual.
The microprocessor unit is located in the black box on top
of the alternator (see figures 3 and 8).
2.5.4 Battery charger
On the engine is an alternator generating 50 Amp 12V. This
current is rectified to charge the battery. The voltage is
regulated at ±14.4V.
2.5.5 Alarms and shut down
In the event of malfunctioning this will be indicated by the
failure light, details will be shown on the display and the
engine will be shut down. There are three functions
guarded: oil pressure, coolant temperature and alternator
temperature.
Too high alternator temperature indicates the alternator
coolant to be blocked or the pump impeller to be damaged.
All alarm switches are closed when no malfunction occurs.
A contact is cut in the event of an alarm. This means that
the generating set will not work when the alarm switches
are broken or there is a loose wire. The system therefore is
intrinsically safe. The panel will display details about the
alarm.
2.5.6 Monitoring
Refer to the operating of the Digital Diesel Control.
2.5.7 Control
The generating set can be operated by push buttons on the
panel on the alternator or by the remote control. By pushing
the START button the control system is activated and will
start the engine automatically. Pushing the STOP button will
stop the engine and the electrical system will be
deactivated.
2.5.8 Remote control
All wiring connections from the remote control to the board
are made by plug in connectors.
An intermediate communication cable is in the standard
supply. If necessary an optional longer 8 wire
communication cable can be connected if the standard
length does not suit the required distance. Numerous
remote control units can be put in parallel by using the
connectors on the back of the units. (Refer to installation
instructions)
2.5.9 Hour counter
The remote control offers several timer functions that helps
to schedule maintenance.
2.5.10 Load indicator
On the remote control the load will be indicated on the
display and by the LED-bar. The load is measured by a
current transformer on the alternator.
2.5.11 Fuel specification
The engine must only be used with diesel fuel oil which
conforms to the standards for use in modern diesel engines.
Fuel free from water and contaminants is of the utmost
importance.
2.5.12 Oil information
1 Specification:
The oil must be suitable for oil changes as specified in
the maintenance chapter. The Kubota engine must be
run on heavy duty lubricating oil meeting the
requirements of API class CD, CF or CF_4.

INTRODUCTION
14 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
It is very important to use the correct oil
specification. Very often local oil suppliers
recommend a higher class, because they
assume that a higher class is allowed. This is
not the case. One should not follow these
recommendations.
Using the wrong specification will cause high
oil consumption.
2 Oil viscosity:
We recommend a multigrade oil 15W40.
3 Oil capacity:
Excluding the oil filter the content of the crankcase is 5.2 l.
Including the oil filter it is 5.7 l. Note that the engine may
contain some residual oil due to testing at the factory.
While filling, check the lubricating oil level by means of the
engine oil dipstick. Do not overfill with oil as this may have
a detrimental effect on engine performance.
4 Oil pressure
• Minimum at idle 98 kPa (1 kgf/cm2 - 14psi) (1 bar).
• Normal at ±350kPa (3.5 kgf/cm² - 50 psi) (3.5 bar).
2.5.13 Cooling liquid
The engine is cooled by cooling liquid. The capacity of this
system depends on the size of the radiator piping and other
parts in the cooling system.
Always use coolant which is compatible with
aluminum components of the cooling system.
Do not mix coolants with different kinds of
chemical compound, as this may cause
congelation of the coolant. In case of doubt
refresh the content of the entire cooling
system.
We recommend not using water but cooling liquid that is
marketed for the use in combustion engines. Cooling liquid
protects the engine against frost to minus 25° C. Also it
protects the engine block against corrosion. Initially one can
fill the engine via the filling cap on the exhaust manifold. Fill
up till the level is just below the filling cap. Additional filling
of engine cooling system has to be done via the expansion
tank. When the engine is on temperature the liquid will
expand and the redundant liquid will be pressed into the
expansion tank. This tank has to be filled up till the mark.
On the tank is an overflow connection. This connection can
be used to connect an open hose to drain the overflow of
the cooling liquid to outside the vehicle.
When cooling liquid is not available clean fresh water could
be used with an additive of anti freeze. When using water
with anti freeze the right mixture has to be calculated
according to the information of the supplier of the anti
freeze.
The cooling liquid in the engine is pressurised. A high
pressure hose connects the manifold to the expansion tank.

2.5.14 Technical data
GENERAL
Model
W-SQ-Pro 15/10.8, Three Phase, mobile applications
RPM
1500
Alternator
3 phase synchronous (air cooled)
Engine
Kubota diesel, model V1505
Number of cylinders
4
Displacement
1758 cm3
Bore X stroke
78x78.4 mm
Combustion air consumption
1.8 m³/min.
Continuous power engine
12 kW
Cooling system
By means of a radiator.
Fuel lift pump engine
electric pump (12 V DC), additional pump available upon request
Starting battery (optional)
85 Ah 12V
Fuel consumption
2-5.5 litre/hour, load dependent
Control
Digital Diesel Control including automatic start/stop
ELECTRICAL SPECIFICATIONS
Output voltage
230/400V 50 Hz alternating current (AC) three phase,
re-connectable to three phase 230V
Output rating
12 kVA = 12kW at power factor cos phi = 1
Voltage tolerance
± 2% (balanced load)
Frequency tolerance
± 1% (electronic governor)
Alternator
Air cooled, brushless, four pole, 6 or 12 wire, synchronous
Voltage regulation:
AVR
MECHANICAL SPECIFICATIONS
Supply includes
Sound shield with steel base, mounted on rubber anti vibration mounts. (Generator
set without sound shield is optional)
Dimensions L x W x H
1145 x 625 x 690 Mm
Colour
Metallic silver / grey
Weight
410 kg including sound shield
Max. installation angle
20 degrees
Standard supplies
Digital remote panel (+15 m cable), fuel filter, fuel lift pump, user and installation
manuals
Available as option:
Installation kits, non earth return (ungrounded), spare part kits

INTRODUCTION
16 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
2.5.15 Wiring codes and colours
number
colour
cable code no
cross section
battery > starter motor
red
25 mm2
starter motor > DDC
1
red
6 mm2
starter motor > LCP
13
red
2,5 mm2
battery > ground
black
25 mm2
ground > LCP ground (GND)
2
black
4 mm2
DDC > glow plug
3
brown
4 mm2
DDC > starter solenoid
4
yellow
2,5 mm2
LCP > fuel lift pump +
5
grey
1,5 mm2
LCP > fuel lift pump –
15
black
1,5 mm2
DDC > LCD
5
grey
1,5 mm2
DDC > oil pressure switch
6
purple
1 mm2
LCP > oil pressure switch
6
purple/black
1 mm2
DDC > water temperature switch
7
blue
1 mm2
LCP > water temperature switch
7
blue/black
1 mm2
DDC > generator temperature switch
8
blue/green
1 mm2
LCP > generator temperature switch
8
blue/pink
1 mm2
DDC > fuel solenoid (hold)
9
green
1,5 mm2
DDC > fuel solenoid (pull)
20
pink
1,5 mm2
DDC > fuel solenoid (com.)
17
black
1,5 mm2
B+ terminal alternator > starter motor
21
red
6 mm2
DDC >R terminal alternator
18
white
1,5 mm2
DDC > L terminal alternator
19
orange
1,5 mm2
DDC > current measuring transformer AC1
66
black
1 mm2
DDC > current measuring transformer AC1
66
red
1 mm2
DDC > current measuring transformer AC2
77
black
1 mm2
DDC > current measuring transformer AC2
77
red
1 mm2
DDC > current measuring transformer AC3
88
black
1 mm2
DDC > current measuring transformer AC3
88
red
1 mm2
DDC > LCP
12
black
1,5 mm2
DDC > LCP
14
red
1,5 mm2
DDC > LCP
16
red/green
1,5 mm2
DDC > generator AC output
33
brown
1 mm2
DDC > generator AC output
33
blue
1 mm2
DDC > generator AC output
44
brown
1 mm2
DDC > generator AC output
44
blue
1 mm2
DDC > generator AC output
55
brown
1 mm2
DDC > generator AC output
55
blue
1 mm2
DDC=Digital Diesel Control Unit
LCP=Local Control Panel

INFORMATION
EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 17
2.5.16 Lay out control wiring
Fig. 12: Electrical Diagram control wiring W-SQ12 – three phase, mobile applications
See figure 15 for connection
of the radiator fan

INTRODUCTION
18 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5

INFORMATION
EN / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5 – Three phase for mobile applications / February 2020 19
2.5.17 Electrical diagrams AC connections (alternator models with 6 wires)
Only valid for alternator models with 6 wires.
Fig 13a: Electrical Diagram 230 / 400 V AC / 50 Hz three phase (Star configuration)

INTRODUCTION
20 February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5
Only valid for alternator models with 6 wires.
Fig 13b: Electrical Diagram 230 / 400 V AC / 50 Hz three phase (Delta configuration)