Genset Installation
Recommendations
Our energy working for you.TM
About this manual
Installation Recommendations
Beneficial purpose
Basic reference information
Whatever the use of the on-site power is intended to be,
reliability of service from the on-site equipment,
performance, and cost effectiveness are primary
concerns of the users.
In order to have instant availability of basic information
which is needed during installation, operation and
maintenance of the generating set, the information is
compiled in a list form and should be available to the
operator / user near the installation, preferably visible all
the time.
Any event or project needs a right start, which leads to
the winning position. Generating set/s installation and
commissioning recommendations means exactly the
same “The Right Start“. This is bound to lead to achieve
expected reliability, durability, economy, serviceability,
equipment uptime, better aesthetics, safety and better
working conditions.
Following information should be available :
1. Project Details
2. Reference Literature
A. Project Details:
The purpose of this manual is to provide guidance to
system and facility designer for the right start. However,
this manual details typical installations and it is not
possible or practical to cover specific details to many
variables in an application. In such cases, the user is
requested to contact Cummins or GOEMs (Generating set
Original Equipment Manufacturers) at address given on
the back cover.
● User -
Name, Address, Contact Person,
Phone / Mobile Nos., Email
● Consultant - Name, Address, Contact Person,
Phone / Mobile Nos., Email
● Supplier Name, Address, Contact Person,
Phone / Mobile Nos., Email
● Service Provider - Name, Address, Contact Person,
Phone / Mobile Nos., Email
● Equipment major details:
● Engine number and make
● AC Generator number and make
● Equipment number and make
● Major specifications
● Major loads – kVA/ kW ratings, starting
type and normal loading sequence
● Language for instructions
Always keep in mind that the installations should comply
with State / Central Government and other applicable
statutory requirements.
About this manual
This manual provides installation and commissioning
general guidelines/recommendations for Cummins Diesel
Generating Set housed in an Acoustic Enclosure. In this
manual different types of installations (roof-top,
basement, room housed etc.) have been considered while
preparing the guidelines / recommendations. However,
any new, uncommon or critical installation needs to be
consulted with Cummins network.
B. Reference Literature / Information:
● Site drawing
● Installation and commissioning recommendations
plus Installation drawing
● Operation and Maintenance manual
● Logbook
● Relevant approvals and certificates from the
concerned authorities like CPCB, SEB, Municipal
Corporation, Fuel Authority etc.
The information is supported by different photographs,
diagrams and reference information tables. The iformation
has been compiled together for adequate information but
still keeping in mind to make this manual crisp, handy and
user’s friendly.
We are sure, this manual will be useful to the installer and
in-turn to equipment user to achieve desired performance
of the generating set/s.
1
Preliminary design
Installation Recommendations
Preliminary design
Loading and Unloading
Foundation
A. Provision for lifting is
provided on the acoustic
enclosure. Unload
damage free by lifting
with proper lifting tackle
/ nylon sling / steel
rope of suitable capacity.
B. Spreader bar / spacer
plate of suitable size may be required to avoid
damages.
C. Ensure lifting or hoisting equipment has appropriate
tires for the terrain to avoid becoming stuck or tipping
over.
D. Use a suitable lift truck with arms longer than the
acoustic width if ground is uneven or the hauling
distance too far.
A. Do not install acoustic enclosure on loose sand or
clay.
B. Base / foundation should be designed considering
safe bearing capacity of soil.
C. The length and breadth of base / foundation should
be at least 150-300 mm (6-12”) more than acoustic
enclosure length and breadth respectively.
D. Ensure that the concrete is completely set and
hardened before positioning the enclosure.
E. It is recommended to have base / foundation height
about 100-150 mm above ground level, it helps to
maintain cleanliness.
F. Check the base / foundation level diagonally as well as
across the length for even flatness and same should be
should be within ± 0.5 degrees of any horizontal plane.
G. The installation design must provide a proper base /
foundation to support the acoustic weight and to
prevent damaging or annoying levels of vibration
energy from migrating into the building structure. In
addition, the installation should assure that the
supporting infrastructure for the generator set does not
allow vibration from the enclosure to migrate into the
stationary portion of the equipment.
H. Whenever seismic events are a consideration, a
qualified structural engineer should be consulted.
E. Ensure that lateral movement of the enclosure is
minimum during transportation.
F. Use lift points on the
acoustic enclosure
which provide support to
the equipment when it is
moved. This makes it
easier to set them up
on a trailer base or on the
ground.
G.Use a hoist and an
adjustable lifting beam in
order to lift. All
supporting members
(chains and cables)
should be parallel to each
other and as perpendicular as possible to the top of
the object being lifted.
H. Ship / transport dry genset including batteries i.e.
without the lube oil and jacket water coolant.
I. Center of gravity calculation is important, especially
when the gensets are hoisted by overhead cranes.
2
Preliminary design
Installation Recommendations
Preliminary design
Site location
F. Enclosure should be located away from polluted
atmosphere like acidic fumes, cement dust, stone dust
cotton fibres, furnace chemicals etc. wherever
possible. In case location is dusty or polluted, contact
OEM/ Cummins. Heavy duty air cleaner is must for
such installations. Heat exchanger cooled system is
recommended for such installations as radiator gets
clogged in dusty atmosphere.
G.For humid / coastal atmospheric applications, anti
condensation heaters are mandatory for alternator.
H. Consider issues of security from flooding, fire, icing,
and vandalism.
I. Proper access is important for
- Initial product delivery and installation.
- Service i.e. for general maintenance and inspections.
- Working space for major work such as overhauls or
component removal/replacement.
J. Rooftop installations require further planning and
structural design consideration. Vibration and fuel
storage / delivery may be problematic with rooftop
installations.
K. For aesthetic reasons, consider exhaust placement in
relation to the building. Over a period of time, exhaust
gas carbon deposits will tend to accumulate on any
nearby wall or structure.
A. Determine whether the location of the acoustic
enclosure will be inside a building or outside in a
shelter or housing. The overall cost and ease of
installation of the power system depend upon the
layout and physical location of all elements of the
system –– generator set, fuel tanks, ventilation ducts
and louvers, accessories, etc.
B. Road and access to site needs to be checked before
transport. Road closure or transport escort also needs
to be considered before physical movement.
C. Crane reach or crane height needs to be checked or
alternatively rolling needs or fork lift arrangements are
to be made.
D. Fuel supply tank design and installation in many areas
is controlled by regulations that are generally written for
two separate purposes: environmental protection and
fire protection. Regulations, their enforcement and
exemptions vary by location, it is necessary to research
and understand local requirements.
E. Acoustic enclosure should be located considering wind
direction ensuring that there is no obstruction to natural
wind flow and the prevailing wind do not enter into the
radiator / exhaust outlet. If this is not possible, install a
wind barrier. Distance of the wind barrier from the
enclosure should be atleast 2.5 - 3 times radiator side
opening height.
Wind barrier
3
Preliminary design
Installation Recommendations
Preliminary design
Enclosure placement / Enclosure room
I. Access and clearance
i. Enough opening / shutters should be provided
so that entry and placement of the enclosure is
easily possible.
ii. Generator sets will require access for service to
both sides of the engine as well as the control/
alternator end of the machine. Local electrical
codes may require specific working space for
electrical equipment. Allow for working space equal
to the width of the genset on both sides and rear.
Also ensure sufficient overhead clearances are
provided.
J. Please refer table for typical acoustic enclosure sizes.
K. Future expansion plans should be considered while
deciding total area.
L. The generator room / area around enclosure should
not be used for storage purposes.
M. Avoid installing the enclosure beside heat generating
equipment, or directly below water or steam pipes or
in the vicinity of corrosive substances or vapours,
metal particles and dust.
A. Ensure sufficient lighting / illumination at the
installation space.
B. Provide suitable , safe access / staging to elevated
items.
C. Provide auxiliary AC supply together with the
associated AC distribution panel and may be with
motor control unit (MCC) where applicable.
D. Standard tool kit should be available easily and
quickly. It should be protected from corrosion and
stored in a dry place.
E. If spares are supplied alongwith the equipment, they
should be protected from corrosion and stored in a
dry place.
F. In case of multiple enclosures provide minimum 2
meters or sufficient clearance to open adjacent doors
simultaneously of two enclosures.
G. While making the layout, provision should be made
for :
I.
Cables
II. Fuel lines
III. Breather vent
IV. Coolant / lube oil drain
V. Oil storage
VI. Spares storage
H. Normally, all entry / exit provisions of above are
considered in enclosure design. Try to avoid additions.
If it is required to have additional entry / exit
provisions, ensure for proper sealing of noise,
temperature and entry/exit of foreign particles.
Typical acoustic enclosure dimensions*
Genset Model
C 15 D5 P
C 20 D5 P
C 25 D5 P
C 30 D5 P
C 35 D5 P
C 40 D5 P
C 50 D5 P
C 62.5 D5 P
C 75 D5 P
C 82.5 D5 P
C 100 D5 P
C 125 D5 P
C 140 D5 P
C 160 D5 P
C 180 D5 P
C 200 D5 P
C 250 D5 P
C 320 D5 P
C 380 D5 P
C 500 D5 P
C 600 D5 P
C 625 D5 P
C 750 D5 P
C 800 D5 P
Prime Rating
(kVA)
Engine Model
15
20
25
30
35
40
50
62.5
75
82.5
100
125
140
160
180
200
250
320
380
500
600
625
750
800
X 1.7 G1
X 2.5 G1
X 2.5 G2
S 3.8 G2
S 3.8 G3
S 3.8 G4
S 3.8 G6
S 3.8 G7
6BT 5.9 G1
6BT 5.9 G1
6BTA 5.9 G1-I
6BTA 5.9 G2-I
6BTAA 5.9 G1-I
6CTA 8.3 G1-I
6CTA 8.3 G2-I
6CTAA 8.3 G1-I
6CTAA 8.3 G4
NTA 855G2-I
NTA 14 G3
KTA 19 G9
VTA28 G3-I
VTA28 G5-I
KTA 38 G2-I
KTA 38 G3-I
* Dimensions of the enclosure are excluding the silencer.
Length (mm)
Enclosure Dimensions
Width (mm)
Height (mm)
2200
2200
2200
2800
2800
2800
2800
2950
3850
3850
4000
4000
4000
4500
4500
4500
4850
5500
5500
6500
7000
7000
7500
7500
900
900
900
1150
1150
1150
1150
1150
1150
1150
1150
1150
1150
1500
1500
1500
1700
2000
2000
2000
2500
2500
2500
2500
4
1375
1375
1375
1450
1450
1575
1575
1575
1700
1700
1700
1700
1700
1850
1850
1850
2050
2450
2450
2300
2925
2925
2925
2925
Preliminary design
Installation Recommendations
Preliminary design
Normal precautions and safeties
P. Physically separate the generator feeders from the
normal wiring feeders to prevent possible
simultaneous destruction as a result of a localized
catastrophe such as a fire, flooding, or shear force.
Bypass–isolation transfer switch equipment so that
transfer switches can be maintained or repaired
without disruption of critical load equipment.
Q. Large stiff cables may not provide sufficient ability
to bend even though they are considered flexible.
This is also true of some conduit types. Failure to
allow sufficient flexibility will result in damage to
enclosures, leads, cables, insulation, or connection
points.
R. Seismic Areas: In seismic risk areas, special electrical
installation practices are required, including seismic
mounting of equipment – contact concerned
consultant/s.
A. Safety involves three aspects: human safety, safe
operation of the generator set itself (and its
accessories) and reliable operation of the system.
Reliable operation of the system is related to safety
because equipment affecting life and health is often
dependent on the generator set e.g. hospital life–
support systems, building ventilators, elevators, fire
pumps, security etc.
B. Ensure that equipment is correctly and safely installed,
fully complies with all central, state and local codes
and any person operating this equipment has been
properly trained.
C. The fire protection system must comply with the
requirements of the authority.
D. Hot exhaust gasses must never be directed toward
anything that may catch fire or explode.
E. Never operate the generator unless all guards, covers,
shields and other safety items are properly installed.
F. Never operate the engine when the air cleaner is
removed. An engine backfire can cause serious burns.
G. Never “jump start” a generator to start the engine.
If the battery charge is insufficient to start the engine,
charge or replace the battery and try to restart. Jump
starting a battery can cause the battery to explode.
H. Unauthorized modification of a generator set may
make the unit unsafe for operation or may impair the
operation of the unit. Never start a generator set that
has been modified or tampered with. Be sure that all
covers and guards are properly installed and that the
unit is safe before starting the engine.
I. Keep generator away from flammable or hazardous
materials (trash, rags, lubricants, explosives, paints
etc.) and grass or leaf build up.
J. Operator should use safety glasses with side shields
and hearing protection.
K. Disconnect all connections to the control system on
engine / genset before doing any welding work.
L. Do not tamper control system in case of any problem.
There are no user serviceable parts inside the various
controls supplied along with Cummins engine / genset.
Call the nearest Cummins office / dealer for help.
M. Disconnect the battery’s ground terminal before
working in the vicinity of the battery or battery wires
during installation and maintenance.
N. Be sure all wiring / cabling complies with the all
regional and local codes / regulations / standards.
O. Be sure the system is properly grounded before
applying power.
5
Preliminary design
Installation Recommendations
Preliminary design
Ventilation
G. Field Check for Proper Ventilation
1. Run the engine on full load / typical load for about 1
hour so that temperature in the enclosure gets
stabilized.
2. Measure the ambient air temperature (ambient
temperature should be measured outside the
enclosure in shade).
3. Measure the temperature inside the enclosure.
Enclosure temperature should be measured near air
cleaner inlet of engine.
4. Calculate temperature difference between enclosure
temperature and ambient i.e. delta T.
Sometimes to ensure proper ventilation, it may be
necessary to measure actual airflow by
anemometer.
A. Cross ventilation and free flow of cool, clean and
fresh air should flow from alternator end to engine.
B. Additional ventilation arrangement may be required for
radiator cooled engines installed in acoustic enclosure
because acoustic enclosure traps radiated heat,
decreasing cooling capabilities. Hence these sets may
need bigger ventilation fans. Radiator cooled engines
may create slight negative pressure inside the genset
room / enclosure. Maximum static restriction should
not increase 6-mm of water column.
C. For basement installations, supply of fresh air and
forced ventilation through air ducts is required to
remove heat.
D. Refer to table for values of air required and fan flows
for various gensets rated at 1500 rpm.
Values mentioned in table are with lagged exhaust
piping in the room and silencer fitted outside the
room.
E. Maximum allowed temperature rise above ambient in
genset enclosure is :
Max. ambient allowable temp. rise upto 40oC is 10 oC
and above 40 oC is 5 oC
F. Adequate capacity natural ventilators can be used
for acoustic enclosure room.
Engine Model
QSK60 - G4
QSK60 - G3
KTA50 - G8 - I
KTA50 - G3
KTA38 - G5
KT38 - G2 - I (2300)
VTA28 - G5
VTA28 - G3
KTA19 - G4
KTA19 - G3
KTA1150 - G
NTA14 - G3
NTA855 - G2 BC
NT855 - G6 BC
NT855 - G5 BC
NT855 - G4 BC
6CTAA8.3 - G1 - I
6CTA8.3 - G2 - I
6CTA8.3 - G1 - I
6CT8.3 - G2 - I
6BTA5.9 - G2 - I
6BT5.9 - G2 - I
S3.8 - G7
S3.8 - G6
S3.8 - G5
S3.8 - G4
S3.8 - G3
S3.8 - G2
X2.5 - G2
X2.5 - G1
X1.7 - G1
Natural Ventilators
6
Rating
Total Air
(0.8 pf) (Ventilation + Breathing)
requirement for Genset
Max. amb.
Max. amb.
above
below
400C
400C
(rise 5 0C)
(rise 10 0C)
kVA
lt./sec
2000
1875
1500
1250
1000
750
625
600
500
450
380
380
320
285
250
225
200
180
160
140
125
82.5
62.5
50
45
40
35
30
25
20
15
41915
38525
34955
31475
26980
21795
17770
17405
14410
13110
12070
11110
9385
8975
8285
7305
6245
6035
5565
4955
4920
3420
2450
2090
2090
1715
1420
1240
1060
930
670
lt./sec
22090
20310
18275
16420
14050
11395
9270
9060
7480
6800
6255
5750
4855
4650
4300
3795
3225
3115
2880
2555
2525
1760
1260
1075
1075
890
730
640
542
475
345
Radiator
Fan flow
in
Genset
room
lt./sec
32285
32285
28400
27375
23855
22655
22655
18880
20280
13000
10385
10385
10070
10070
10070
10070
7385
5540
5540
5540
4000
2880
1880
1880
1880
1880
1880
1880
1250
1250
1050
Mechanical design
Installation Recommendations
Mechanical design
Air System
Engine Model
A. Vacuum indicator is supplied with all engines to
indicate choked filter. Max air intake restriction with
clean and choked filter is as follows :
X Series
mm/wc (in/wc)
Clean filter
250 (10)
Choked filter 400 (15.7)
S Series S Series All Engines All Engines
Gas
(Naturally (Turbo with medium with heavy engine
Aspirated) charged)
duty A/c
duty A/c
mm/wc (in/wc) mm/wc (in/wc)
250 (10)
380 (15)
250 (10)
500 (20)
mm/wc (in/wc)
kVA
QSK60 - G4
QSK60 - G3
KTA50 - G8 - I
KTA50 - G3
KTA38 - G5
KT38 - G2 - I (2300)
VTA28 - G5
VTA28 - G3
KTA19 - G4
KTA19 - G3
KTA1150 - G
NTA14 - G3
NTA855 - G2 BC
NT855 - G6 BC
NT855 - G5 BC
NT855 - G4 BC
6CTAA8.3 - G1 - I
6CTA8.3 - G2 - I
6CTA8.3 - G1 - I
6CT8.3 - G2 - I
6BTA5.9 - G2 - I
6BT5.9 - G2 - I
S3.8 - G7
S3.8 - G6
S3.8 - G5
S3.8 - G4
S3.8 - G3
S3.8 - G2
X2.5 - G2
X2.5 - G1
X1.7 - G1
mm/wc (in/wc) mm/wc (in/wc)
250 (10)
635 (25)
380 (15)
635 (25)
200 (8)
380 (15)
B. Heavy duty air cleaners should
be used for dusty environment.
Contact OEM / Cummins if
enclosure is to be kept in dusty
environment. Please note that
gensets are supplied with
medium duty air cleaners as
standard scope.
C. If fibrous conditions exist, care should be taken to
prevent the fibers getting entered into the enclosure /
air cleaner and no such fibre element shall enter/ block
the air flow of alternator.
Exhaust System
A. Exhaust system should create minimum total back
pressure.
B. Limits for exhaust back pressure
Model
mm (In.) of Hg
KTA50G8/QSK60/S Series/Gas Engines
KTA50G3/KT2300G/VTA28/K19/ NT/N14/B/C/X
Rating
(0.8 pf)
51 (2)
76 (3)
2000
1875
1500
1250
1000
750
625
600
500
450
380
380
320
285
250
225
200
180
160
140
125
82.5
62.5
50
45
40
35
30
25
20
15
Exhaust pipe
size max. 4
Bends
Max. Lenght
10 mtrs.
Min. ID
No. x mm
2 x 325
2 x 325
2 x 250
2 x 250
2 x 250
2 x 200
2 x 125
2 x 125
1 x 200
1 x 200
1 x 125
1 x 125
1 x 125
1 x 125
1 x 125
1 x 125
1 x 100
1 x 100
1 x 100
1 x 100
1 x 100
1 x 100
1 x 75
1 x 75
1 x 75
1 x 75
1 x 75
1 x 75
1 x 50
1 x 50
1 x 50
Exhaust
Gas flow
(No. of banks
x
flow per bank)
No. x lt. /sec
2 x 2805
2 x 2700
2 x 2220
2 x 1910
2 x 1460
2 x 1245
2 x 945
2 x 930
1 x 1600
1 x1460
1 x 1095
1 x 1055
1 x 990
1 x 1160
1 x 960
1 x 860
1 x 610
1 x 550
1 x 540
1 x 470
1 x 225
1 x 225
1 x 190
1 x 150
1 x 150
1 x 150
1 x 115
1 x 115
1 x 75
1 x 75
1 x 50
F. The exhaust outlet should be in the direction of
prevailing winds.
G.There should be rain trap to avoid rain water entry.
If rain cap is used the distance between exhaust pipe
and rain cap should be higher than diameter of pipe. It
is also recommended that horizontal run of exhaust
piping should slope downwards away from engine to
the condensate trap. Silencer should be installed with
drain plug at bottom.
New installations should have back pressure lower by
12 mm (0.5”) of Hg than limit mentioned above.
C. Exhaust piping outside the enclosure should be lagged
along with aluminum sheet cladding. Typical thickness
of lagging is 50 mm.
D. If exhaust pipe length is more than 7 m, then additional
flexible bellow / provision for expansion should be
provided.
E. It is recommended to use ‘Schedule B’ MS/
prefabricated stainless steel pipes and long bend
elbows. Please refer Table for pipe sizes. If number of
bends are more than 4 or pipe length is more than 10
meters than contact OEM / Cummins for piping
arrangement.
Location : Optimum Silencer (when fitted outside
enclosure) Location of the silencer in exhaust system has
very definite influence on both silencing and back
pressure imposed on the system. The preferred silencer
locations are given in the Table where ‘L’ is length of the
total exhaust system measured from exhaust manifold in
meters.
(See table in next column)
Please note that locating the silencer as per optimum silencer location is
not mandatory. For high rise buildings suitable arrangements may have
to be provided in consultation with acoustic engineer.
7
(See table in next page)
Mechanical design
Installation Recommendations
Mechanical design
Optimum Location of Silencer
In-line Engine
Best
2L / 5
Second best
2L / 5
Worst Location of Silencer
In-line Engine
Worst
L or 3L
5
5
Fuel system
‘V’ Engine
A. Ensure that fill point is accessible and clean all the
time. Provide proper lid and lock. Ensure that all piping
is leak free.
B. Service storage tank should be located such that
piping will have minimum and controlled restriction.
This is more important and difficult in case of roof-top
installation.
C. Fuel transfer pump, preferably automatic is
recommended than manual.
D. Avoid fuel spillage. Do not overfill the fuel tank.
Fuel expands when warm and may overflow.
E. Ensure proper fuel disposal arrangement.
F. Ensure that fuel dilution and theft does not occur.
Care should be taken in the purchase of fuel and filling
of tanks to prevent ingress of dirt and moisture into the
diesel fuel system.
G.Install fuel treatment plant depending upon available
quality of the fuel (mixed with water or sediments like
rust, scale, weld slag, dirt and other debris.
H. Ensure that cavitation does not take place in the
system.
4L - 5
5
2L - 4.5
5
‘V’ Engine
3L -10
5
Where ‘L’ = Length
I. Common exhaust system for multiple sets is not
recommended due to soot, condensation, excessive
suction pressure, entry of exhaust gases in non
working engine, increased back pressure and lack of
fail safe system availability. However exhaust of two
banks of V-engines can be connected, after silencer.
Ensure that area of common pipe is greater than sum
of the areas of individual pipes. Exhaust of engines can
be directly connected to chimney at different levels as
shown.
Common exhaust piping (not
recommended)
Exhaust Rain Cap
J. Installation of explosion relief valve is recommended,
particularly for bigger sets.
K. The exhaust system outlet direction should also be
carefully considered. Hot exhaust gasses must never
be directed towards undesirable locations like
caféteria, play ground, school or public place etc. or
towards combustible surface. Exhaust from a diesel
engine is hot and will contain soot and other
contaminants that can adhere to surrounding surfaces.
It is highly recommended that the exhaust system be
carried up as high as practical on the downwind side of
buildings in order to discharge straight up to maximize
dispersal.
Poor routing of fuel hoses
Cooling system
A. Ensure initial fill + top up water used in cooling system
has recommended properties as mentioned in
operation and maintenance manual.
B. Water softening / demineralizing plants should be used,
if water quality is not acceptable.
8
Mechanical design
Installation Recommendations
Mechanical design
Starting system
Cranking torque and starting time is affected by the
following:
A. Auxiliary loads vary depending upon the type of
application. The auxiliary torque curve will affect the
time to accelerate cranking speed.
B. Fuel with low energy content will need more time to
crank because of slower burning and erratic firing.
C. Colder ambient temperature increase starting torque
requirement. Glow plugs and/or ether starting aids are
recommended when temperatures fall below certain
levels, refer O & M. Install jacket water heaters to
maintain the jacket water at a temperature high enough
to allow for easy starting of the engine.
D. Increased lube oil viscosity because of cold conditions,
increase starting torque demand and in turn increasing
starting time. Lube heaters may used if required.
E. Parasitic loads affect stating torque needs.
F. Batteries supplied with genset are generally dry and
uncharged. First charging of uncharged batteries is
very important and should be done from authorized
battery charging center. It takes about 72-80 hours to
completely charge a new battery.
Model
KV and above
V28 / K19
N14 / 855 / N8 / C
B 5.9
S 3.8
X Series
Battery
Capacity
AH
Cable
Size
mm 2
Electrical
System
Volts
360
180
180
150
120
88
70
70
50
50
50
35
24
24
24
12
12
12
9
Electrical design
Installation Recommendations
Electrical design
B. While terminating cables avoid any tension on the
bolts / busbars.
C. While terminating R.Y.B. phase notations should be
maintained in the alternator and control panel for easy
maintenance.
D. Crimped cables should be connected to alternator
and control panel through cable glands.
Genset / Engine Controls
The generator set is controlled locally by a dedicated
Generator Control Panel. This incorporates the control
systems, metering, alarm indications and customer
connections.
Two types of control system are currently available;
Engine Governing, Control System and Power Command
Control.
A. Make sure that the polarity of the battery connections
are correct before applying power to the all Electronic
Controls.
B. Do not test wire leads to see if they are ‘live’ by
flashing them on either engine body or the Control
mounting stand.
C. Disconnect all connections to the control system on
engine / genset before doing any welding work on set.
D. There are no user serviceable parts inside the various
controls supplied along with Cummins engine / genset.
Call the nearest Cummins office / dealer for help.
E. Turn off or remove AC power from the battery charger
and then remove –ve battery cable from the engine /
genset battery. This will avoid possible damage and
someone else starting engine / Genset accidentally.
F. Make sure the battery area is well ventilated before
servicing the battery. Arcing can cause explosion due
to hydrogen gas given off by batteries.
G.Always refer to the wiring diagram and product manual
supplied with the engine / genset for details.
Earthed cable glands for
crimped cables
Proper cable terminations
E. For AMF application, use 8/10 core 2.5 sq. mm
armoured copper cable for control cabling.
F. Typical cable sizes for 415 V application are provided in
the table which are indicative, please refer to cable
manufacturers for details. For HT installations, kindly
contact GOEM’s for details on sizing.
kVA Rating
Typical Cable Sizes for DG Sets
Amp Rating
Cable size Sq. mm x Runs
2000
1800
1500
1250
1000
750
650
625
600
500
450
380
320
285
250
225
200
180
160
140
125
100
82.5
75
62.5
50
30
25
20
15
25 (Single Phase)
20 (Single Phase)
15 (Single Phase)
Electrical protection
If the overload and short circuit protection is provided by
a circuit breaker, care must be taken with the protection
settings. Circuit breakers are designed for operation with
the utility supply, which can provide much higher and
longer fault levels than a generator. The circuit breaker
overcurrent and short circuit settings should therefore be
set according to the overcurrent/short circuit curves of
the circuit breaker and not the overcurrent/short circuit
dials on the circuit breaker. The generator overload and
short circuit settings on the protection should be set so
that they are below the thermal damage curve for the
generator.
Cabling
A. Overheating due to loose thumbing / undersize
cables causes most of electrical failures, hence
power cabling between alternator and control panel
and control panel and change over switch to mains
should be done with correct size of cables and
thimbles.
2782
2504
2087
1739
1397
1043
904
870
835
696
626
529
445
396
348
313
278
250
223
195
174
139
115
104
87
70
42
40
40
32
125
80
63
500 x 10
400 x 10
400 x 8
400 x 7
300 x 6
400 x 4
300 x 4
300 x 4
240 x 4
300 x 3
240 x 3
400 x 2
300 x 2
225 x 2
400 x 1
400 x 1
300 x 1
240 x 1
185 x 1
150 x 1
120 x 1
95 x 1
70 x 1
50 x 1
35 x 1
25 x 1
16 x 1
10 x 4
10 x 4
6x4
50 x 2
35 x 2
25 x 2
--300 x 9
300 x 8
225 x 7
240 x 5
225 x 5
185 x 5
185 x 5
185 x 4
150 x 4
185 x 3
150 x 3
120 x 3
185 x 2
185 x 2
------------------
--240 x 10
240 x 9
-185 x 6
150 x 6
120 x 6
120 x 6
120 x 5
95 x 5
120 x 4
95 x 4
70 x 4
95 x 3
95 x 3
------------------
Notes:
1. Use 3 1/2 core armoured power cables woth aluminium conductor (AYFY).
2. Current rating of cables are taken based on operating temperature of 70 0C.
3. For multiple runs of cables, deration factor of 0.75 is considered i.e. 25% deration applied.
4. AYFY: Aluminium conductor, PVC insulation, Steel strip armour, PVC outer sheath.
5. Cable sizes mentioned are in square mm.
6. For sets above 1000 kVA, use of proper busbars in bus ducts is recommended.
7. Earthing as per IEC rules to be provided.
10
Electrical design
Installation Recommendations
Electrical design
H. The terminal box is most conveniently glanded on
either right or left hand side. Both panels are
removable for drilling/punching to suit glands/or
glanding boxes. If single core cables are taken through
the terminal box side panel, an insulated or nonmagnetic gland plate should be fitted.
I. Incoming cables should be supported from either
below or above the box level and at a sufficient
distance from the centre line of the generating set.
This would avoid a tight radius at the point of entry into
the terminal box panel, and allow move ment of the
generator set on its anti-vibration mountings without
excessive stress on the cable. Before making
final connections, test the insulation resistance of the
windings. The AVR should be disconnected during
this test. When making
connections to the
terminals the
incoming cable
termination should be
placed on top of the
winding lead
termination/s and
clamped with the nut
provided.
Earthing
A.The generating set should be connected to earth in
accordance with local regulations.
B. All metal-work of the generating set should be bonded
so that there is a continuous low impedance path from
all parts of it, including the engine and bed-plate, back
to the earth point.
C. The size of the cable used for the main earth
connection should be of adequate size.
D. If residual current protection is required for personnel
protection it should not be fitted to the generator circuit
breaker. This can cause spurious tripping, but should
be fitted to the sub circuits requiring the protection.
E. If residual current protection is fitted to the generator
circuit breaker, care should be taken for the earth cable
connection, as the connection point will determine
whether the generator windings and the load are
protected, or only the load is protected.
F. When fitting residual current protection care should
be taken to ensure that there is only ONE earth path to
the main earth point.
G. Earthing all metal-work WITHOUT connecting it to the
generator star point will not give earth protection for
the generator load.
H. If the generators are operating in parallel the star
points can be connected in parallel provided this does
not cause parallel paths for the earth protection, or
cause excessive circulating currents
I. The generating set and all associated equipment,
control and switch gear panels must be earthed before
the set is put into operation.
J. 4 numbers earth pits are required as per Indian
Electricity rules or local electricity board.
● 2 earthing pits for genset / control panel body
● 2 earthing pits for neutral
K. GI strips of suitable size may be used for earthing.
Earthing should be checked at earth strip and the
resistance should be less than 1 ohm. For gensets
with AVM’s between engine / alternator and base rail,
the earthing MUST be done at the engine / alternator
and NOT at base rail.
L. The neutral of the generator is not bonded to the
generator frame as supplied from the factory. An earth
terminal is provided inside the terminal box adjacent to
the main terminals. If the set is required to operate
with the neutral earthed, a substantial earth conductor
(normally equivalent to one half of the section of the
line conductors) must be connected between the
neutral and the earth terminal inside the terminal
box.Additional earth terminals are provided on the
generator feet.
Cable access from either side or
above
J. Care to be taken, that weights of cables should not
fall on alternator / base rail. It is recommended to
support output cables on separate structure on ground.
K. External wirings, when provided for remote
voltage / excitation monitoring / droop CT etc. shall be
screened sheathed type. Maximum length of such
wiring should not exceed 5 meters.
L. Power cables should be type installed in a duct or a
cable tray.
Overhead Cables
11
Electrical design
Installation Recommendations
Earthing strip data
DG Set Rating
Recommended Earth Strips / Wir
30 kVA
40 kVA
50 kVA
62.5 kVA
75 kVA
82.5 kVA
100 kVA
125 kVA
140 kVA
160 kVA
180 kVA
200 kVA
250 kVA
320 kVA
380 kVA
437.5 kVA
500 kVA
625 kVA
750 kVA
1000 kVA
1250 kVA
1500 kVA
2000 kVA
8 SWG Copper
8 SWG Copper
8 SWG Copper
8 SWG Copper
8 SWG Copper
25 x 3mm CU / 25 x 6 mm GI
25 x 3mm CU / 25 x 6 mm GI
25 x 3mm CU / 25 x 6 mm GI
25 x 3mm CU / 25 x 6 mm GI
25 x 3mm CU / 25 x 6 mm GI
25 x 3mm CU / 25 x 6 mm GI
25 x 3mm CU / 25 x 6 mm GI
32 x 3mm CU 1 Run / 25 x 6 mm GI 2 Runs
32 x 3mm CU 1 Run / 25 x 6 mm GI 2 Runs
32 x 3mm CU 1 Run / 25 x 6 mm GI 2 Runs
25 x 6mm CU 2 Runs / 25 x 6 mm GI 2 Runs
25 x 6mm CU 2 Runs / 25 x 6 mm GI 2 Runs
50 x 6mm CU 1 Run / 50 x 6 mm GI 2 Runs
50 x 6mm CU 1 Run / 50 x 6 mm GI 2 Runs
50 x 6mm CU 1 Run / 50 x 6 mm GI 2 Runs
50 x 6mm CU 1 Run / 50 x 6 mm GI 2 Runs
50 x 6mm CU 2 Runs / 50 x 6 mm GI 3 Runs
50 x 6mm CU 2 Runs / 50 x 6 mm GI 3 Runs
e
12
Log sheet
Installation Recommendations
Installation Checklist
Installation Recommendations
Generator set – Installation checklist (Enclosed or Containerized Generating Sets)
This checklist should be used to validate the completion
of a generator set installation, prior to commissioning.
A checklist should be completed for each generator of a
multiple installation.
Day tank fill point clean & clear …….................……………
Electrical bonding completed ….............................………..
Storage facility secured ………........................……………..
------------------------------------------------------------------Exhaust System – Yes or No
Installation prevents exhaust recirculation …......….....……
Installation allows for pipework expansion ……............…..
Welded joints & flanges secured with gaskets ……......…..
Piping correctly supported …………………………......…....
Stack prevents rain ingress …………………..………......….
Condensate drain provided ……………..…………….......…
Exit directed away from building …….………………......….
System lagged & cladded properly ……………….......…….
Flammable material properly protected …………........……
------------------------------------------------------------------Ventilation – Yes or No
Installation prevents hot air recirculation …….............…….
Installation accounts for prevailing wind ......……….......….
Air exit directed away from building ….......……….......……
Forced ventilation if in place wired ……………...................
Moving Louvers if any connected to system …....…......….
Inlet, outlet & enclosure bird protected ……….............……
------------------------------------------------------------------Electrical System – Yes or No
Control system
Field wiring to set mounted control complete ...…......……
Customer wiring to control complete ……………............…
Interconnection to remote control complete ….............…..
Remote emergency stop controls wired ……….............…..
Generator / Switchgear / Changeover / transfer
Means of disconnection / isolation provided ........….......…
Switchgear installation & pre-testing complete ……...........
Cables installed correctly, marked & flexible ……...............
Power connections complete ……………........…….......…..
Enclosure penetration properly sealed …..........…….......…
Enclosure
All electrical boxes clean& covers replaced …..….......……
Auxiliary electrical supply complete ……...........….......……
Grounding system complete & tested ……….......…......….
Utility supply available as required …….............……......…
------------------------------------------------------------------Any other comment / observation if any
……………………………………………………………………
………………………................................………..............….
…………………………………………………….......…………
------------------------------------------------------------------Checklist completed by
……………………………………………………………….......
......…………………….................................…………………
Date ……………………………………………………........….
Company……........................................................……........
------------------------------------------------------------------Note : Completion of this checklist does not relieve
The Installer of contractual obligation.
-------------------------------------------------------------------
Project Details
Project name
………………………………………………….......……...........
………………………………………………….......……………
Customer (End User)
………………………………………………….......……….......
………………………………………………….......……………
Address of Site
……………………………………………………………………
…..........................................................................................
……………………………………….......................................
Tel.No. …..…………………………………….......……………
Mobile …………………………………...................................
Email. ………..…………………………………......…………...
------------------------------------------------------------------Generator Set Details
Generator Set Model. ..………………………......…………...
Generator Set Serial No. ………..........................................
Set No..................................................................................
Controller Type ………………...............................................
Engine Sr. No. ……………………………………….......….....
A C Generator Sr. No. .....…………………………................
Controller Sr. No. ………………………................................
------------------------------------------------------------------Site Information – Yes or No
Site clean & clear from obstruction & secure......................
Site services complete & commissioned.............................
(lighting, auxiliary supply, water etc)
Installation - open air or closed room..................................
Installation on level & firm ground........................................
No loose material near generating set …………..................
Pipes & cables secured .......................................................
Air intake & exit paths clear & clean ...................................
Electrical bonding complete ………………………...............
Comments / Any other irregularity …………................……
..…………………………………………………..………………
……......................................................................................
------------------------------------------------------------------Cooling System – Yes or No
Radiator air outlet clean, free from obstruction ……......….
Coolant overflow well routed for spillage ……….............…
Possibility of hot air recirculation …………….....…......……
------------------------------------------------------------------Fuel System – Yes or No
Bulk storage tank installation complete ..............................
Transfer pump installed & connected ….......….……......….
Piping correct material, cleaned & leak-free …..............….
Spillage containment complete …...................................…
Vent installed, piped to safe area and open …....................
14
Our authorised GOEMs
Powerica Limited
74 - A Mittal Court, Nariman Point,
Mumbai - 400 021
Tel.: (022) 6656 2525
Fax: (022) 2204 3782
Email: dgsets@vsnl.com
Website: www.powericaltd.com
Sudhir Gensets Limited
Plot No. 1, Sector 34,
Gurgaon - 122 001
Phone: (0124) 416 8000 (30 lines)
Fax: (0124) 416 8010
Email: info@sudhirgensets.com
Website: www.sudhirgensets.com
Jaksons Limited
A-43, Phase-II (Extn.), Opp. NEPZ,
Noida - 201305 (U.P)
Tel: (0120) 430 2600/ 256 8923-27
Fax: (0120) 430 2646/ 256 8930
Email: contact@jakson.com
Website: www.jakson.com
Cummins India Limited
Power Generation Business Unit
35A/1/2, Erandawana,
Pune 411 038. India
Tel.: (91) 020-6602 7525
Fax: (91) 020-6602 8090
Cummins Sales & Service (I) Ltd.
35A/1/2, Erandawana,
Pune 411 038. India
Tel.: (91) 020-2543 1234/ 2543 0066
Fax: (91) 020-2543 9490
www.cumminsindia.com
Cummins Power Generation Offices:
Location:
Tel:
Bangalore: (080) 2361 3831/ 2361 1958
Chennai:
098400 88717/ 098402 07633
Delhi:
Telefax: (011) 4161 8357/ 61
Hyderabad: (040) 2766 3017
Indore:
(0731) 645 1042
Jaipur:
(0141) 236 4944
Kolkota:
(033) 2287 8065/ 2247 2481
Lucknow:
(0522) 278 6718/ 278 7514
Mohali:
(0172) 224 0373
Mumbai:
(022) 2756 6351/ 52/ 53/ 54
Vadodara: (0265) 232 4207/ 654 0390
Our energy working for you.TM
24 x 7 Customer Assistance Cell
Tel.: (91) 020-2543 6680
Fax: (91) 020-2544 5916
Call Toll Free: 1-800-2332000
Email: powermaster-india@cummins.com
Cummins has always been a pioneer in product improvement. Thus specifications may change without notice.
PGBU/CIL/003/Genset Inst. Manual/90Deg./February 2008/5000
Fax:
(080) 2361 4552
(044) 2491 1120
(040) 2767 8892
(0141) 236 3746
(033) 2290 3839
(0522) 278 7880
(0172) 224 0371/ 72
(022) 27566355
(0265) 234 0623