NT855 Series (60Hz)
Power
Generation
Diesel Powered
Generating Sets
281 kW - 350 kW 60 Hz
NT855 Series Engines
Model 322 DFCC shown with
optional base and circuit breaker
Standard Genset Features
ST
FI
RM
BSI
ERED
NATIONAL
ACCREDITATION
OF CERTIFICATION
BODIES
Quality Assurance
Registered Firm Certificate Number FM509 in accordance with:
BS EN ISO 9001
Quality Assurance Schedule 3420/1
Sourc
e
One
ernator
Alt
Engine
ntrols
Co
en
e r a ti n g S e
One
Name
t
G
Prime
kW (kVA)
281 (351)
322 (402)
Optional PCC PowerCommand
Control System
●
Microprocessor control
●
Integrates governor and voltage
regulation systems
●
Superior alternator and genset
protection system
●
Accurate battery monitoring system
●
Totally reliable and proven system
I
Model
Prime
281 DFCB
322 DFCC
Alternator
Brushless Group made machine
●
Close voltage regulation
●
Rotor and exciter impregnated with
oil and acid resisting resin
●
12 lead reconnectable
●
Exceptional short circuit capability
●
Low waveform distortion with non
linear loads
Ratings
All kW Power ratings based on a 40°C
ambient temperature reference.
Chassis
Built-in anti-vibration system
Bonded rubber units fitted as standard
eliminates need for rubber mats or
spring mountings
Integrated Control System
●
Totally integrated design
●
Full AC instrumentation
●
Safety shutdowns
●
Local or Remote starting
●
Emergency stop button (optional)
●
CE and non CE options
●
REG
Single Source Responsibility
●
Design, manufacture and test of all
components and accessories are
made by Cummins Power
Generation and Cummins companies
International Integrity
●
Assurance and strength of a
worldwide, world class corporation
Global Backing
●
24 hour spares and service support –
in 72 countries
Single Source Warranty
●
Complete genset covered by
Cummins Power Generation
comprehensive warranty
Packaged Self-Contained Units
●
Units with built in antivibration
systems with provision for base fuel
tank and other accessories
Cummins Engine
●
Heavy duty 4 cycle water cooled
engine
●
Electronic governor control
Cooling System
●
50°C cooling package
Ready Filled
Every set comes filled with lube oil and
anti-freeze
Cummins Power Generation, Cummins Engines and
Newage Alternators are all part of the same group
60 Hz Ratings
Model
Standby
312 DFCB
350 DFCC
Standby
kW (kVA)
312 (390)
350 (437)
Engine
Model
NT855G2
NT855G3
A Single Source for all Power System Solutions
Specifications May Change Without Notice
11/01 CPG NT855/C/60
Specifications
Generator Set Performance
Voltage Regulation
Maintains voltage output to within ±1.0%.
At any power factor between 0.8 lagging and
unity.
At any variations from No load to Full load.
At any variations from Cold to Hot.
At speed droop variations up to 4.5%.
Frequency Regulation
Isochronous under varying loads from no
load to 100% full load when electronic
governor is fitted.
Random Frequency Variation
Will not exceed ±0.25% of its mean value for
constant loads – no load to full load.
Generator Set Options
Waveform
Total harmonic distortion open circuit voltage
waveform in the order of 1.5%. Three-phase
balanced load in the order of 5.0%.
Telephone Influence Factor (TIF)
TIF better than 50.
THF to BS4999 Part 40 better than 2%.
Alternator Temperature Rise
Class H insulation. Temperature rise up to
125°C permitted.
Radio Interference
In compliance with BS800 and VDE levels G
and N.
Engine
! Heavy duty air cleaner
! Coolant heater and thermostat
! Fuel water separator
! Lead acid batteries, cable and fitted tray
! NiCad batteries
! Sump drain pump
! Oil and water drain taps
! CE Compliance (guarding)
! Exhaust temperature monitoring (PCC
only)
! Tool kit
! Compliance to TA Luft
Fuel System
24 volt fail safe actuator. Dual spin-on paper
element fuel filters with Cummins PT fuel
injection system with integral electronic
governor. Dual flexible fuel lines and
connectors.
Filters
Air cleaner with dry element and restriction
indicator. Spin-on full flow lube oil filters and
corrosion resistor filter.
Cooling
50°C radiator as standard. Oil cooler.
Alternator
! Anti-Condensation heater
! Thermistors
! PMG Exciter and MX321 AVR
! 105°C rise alternator
Engine
Cummins NTA855G2 and G3 in-line direct
injection 6-cylinder diesel engines.
Type
Water cooled, four cycle, turbo charged after
cooled.
Construction
Four valves per cylinder, forged steel
crankshaft and connecting rods, cast iron
block, replaceable wet liners.
Starting
24 volt negative earth. Battery charging
alternator 45 amp on N Range. Cranking
current 640 amps at 0°C.
Alternator
Type
Brushless, single bearing, revolving field,
pole, drip proof, screen protected.
Class H insulation.
Enclosed to IP22 (NEMA 1) standard.
IC 01 cooling system.
Fully interconnected damper winding.
AC exciter and rotating rectifier unit.
Epoxy coated stator winding.
Rotor and exciter impregnated with tropical
grade insulating oil and acid resisting
polyester resin. Dynamically balanced rotor
to BS5625 grade 2.5.
Sealed for life bearings.
Layer wound mechanically wedged rotor.
Compliance Standards
To BS4999/5000 pt 99,
VDE 0530, UTE5100,
NEMA MG1-22, CEMA,
IEC 34, CSA A22.2,
AS1359, BS 5514,
ISO 3046 and ISO 8528
Exciter
Triple dipped in moisture, oil and acid
resisting polyester varnish and coated with
anti-tracking varnish.
Sealed solid state automatic voltage
regulator – self-exciting, self-regulating.
Output windings with 2/3 pitch for improved
harmonics and paralleling ability.
Close coupled engine/alternator for perfect
alignment.
Cooling
! Remote radiator cooling (built to order)
! Oil temperature indication
Exhaust System
! Industrial type silencer
! Residential type silencer
! Length of flexible exhaust and bellows
Fuel System
! Sub-base tanks
! Hand fuel transfer pump
! Automatic fuel transfer pump
! Free-standing 450, 900 and 1350 litre
fuel tanks with stand
! Fuel tank level switch
! High fuel level warning
! Low fuel level warning
! Low fuel level shutdown
Generator Set
! Weather protective enclosures
! Silenced enclosures
Control Panel
! Refer to Control Panel literature for
details of options
! 3 or 4 pole circuit breaker
! Battery charger 5 amp or 10 amp
! CE Compliance
! Cable entrance box
! Switch disconnector 3P or 4P
Chassis
Fabricated and welded steel chassis.
Built-in anti-vibration mountings.
Optional sub-base fuel tank with eight hour
capacity, dual flexible fuel lines, dial type
fuel gauge and drain bung.
Finish
Etch undercoated and finished in high gloss
durable green.
General
Complete set of operating and instruction
manuals.
Specifications May Change Without Notice
11/01 CPG NT855/C/60
Technical Data
Generating Sets – 60 Hz
Set output
Prime at 40°C ambient
Model (Prime)
Standby at 40°C ambient
Model (Standby)
Engine Make
Model
Cylinders
Engine build
Governor/Class
Aspiration and cooling
Bore and stroke
Compression ratio
Cubic capacity
Starting/Min °C
Battery capacity
Nett Engine output – Prime
Nett at flywheel – Standby
Speed
Alternator voltage regulation
Alternator insulation class
Single load step to NFPAII0
Fuel consumption (Prime) 100% load
Fuel consumption (Standby) 100% load
Lubrication oil capacity
Base fuel tank capacity – open set
Coolant capacity – radiator and engine
Exhaust temp – full load prime
Exhaust gas flow – full load prime
Exhaust gas back pressure max
Air intake – engine
Air flow – radiator (50°C)
Pusher fan head (duct allowance) 50°C
Total heat radiated to ambient
Engine derating – altitude
Engine derating – temperature
220-480 V 60 Hz
281 kWe 351 kVA
281 DFCB
312 kWe 390 kVA
312 DFCB
Cummins
NTA855G2
Six
In-line
Electronic/A1
Turbo Aftercooled
140 mm x 152 mm
14.0:1
14 Litres
Unaided/–7°C
127 Ah
299 kWm
333 kWm
1800 rpm
±1.0%
H
100%
79 l/hr
89 l/hr
38.6 Litres
800 Litres
79.8 Litres
466°C
4136 m3/hr
76 mm Hg
1613 m3/hr
9.7 m3/s
13 mm Wg
72 kW
4% per 300 m
above 1525 m
2% per 11°C
above 40°C
220-480 V 60 Hz
322 kWe 402 kVA
322 DFCC
350 kWe 437 kVA
350 DFCC
Cummins
NTA855G3
Six
In-line
Electronic/A1
Turbo Aftercooled
140 mm x 152 mm
14.0:1
14 Litres
Unaided/–7°C
127 Ah
344 kWm
385 kWm
1800 rpm
±1.0%
H
100%
87 l/hr
96 l/hr
38.6 Litres
800 Litres
84.8 Litres
521°C
4734 m3/hr
76 mm Hg
1717 m3/hr
9.2 m3/s
13 mm Wg
76 kW
4% per 300 m
above 1525 m
2% per 11°C
above 40°C
In accordance with ISO 8528, BS5514.
Prime: Continuous running at variable load for unlimited periods with 10% overload available for 1 hour in any 12 hour period.
Standby: Continuous running at variable load for duration of an emergency.
Specifications May Change Without Notice
11/01 CPG NT855/C/60
Dimensions and Weights – 60 Hz
A O/A
C O/A
Optional
entrance box
or circuit
breaker either
side.
D
Model
DFCB
DFCC
A1
Battery protrudes
190mm
B O/A
Engine
NTA855G2
NTA855G3
A
3286
3304
A1
3338
3338
B1
SUB-BASE FUEL TANK OPTION
Dimensions and Weights (mm/kg)
B
B1
C
990
1048
1117
990
1048
1117
D
300
300
Set Weight
kg Dry
3178
3293
Set Weight Tank Weight Tank Weight
kg Wet
kg (dry)
kg (wet)
3275
445
1085
3390
445
1085
Set weights are without sub-base tank.
Dimensions and weights are for guidance only. Do not use for installation design. Ask for certified drawings on your specific application.
Specifications may change without notice.
Power
Generation
See your distributor for more information.
Cummins Power Generation Limited
Manston Park, Columbus Avenue
Manston, Ramsgate
Kent CT12 5BF, UK
Telephone: +44 (0)1843 255000
Fax: +44 (0)1843 255902
Email: cpg.uk@cummins.com
www.cumminspower.com
www.cummins.com
Cummins is a registered trademark of Cummins Inc.
Specifications May Change Without Notice
11/01 CPG NT855/C/60
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