Petbow Cummins NT855 Series Diesel Generator

Petbow Cummins Generators 312 to 390 kVA

Petbow Generating Sets Powered By Cummins Diesel Engines

Circuit Breaker Cubicle
3-pole moulded case circuit breaker with optional shunt trip and auxiliary contacts.

Finish
High gloss green finish.

General
Set of operating and instruction manuals.

Options
Refer distributor for range details.

Panel Standard Specification

Run-stop-remote switch.
Automatic remote starting, 2 wire.
Coolant temperature gauge.
Oil pressure gauge.
DC voltmeter.
Running time meter.
Fault reset switch.
Lamp test switch.
AC voltmeter / ammeter with selector switch.
Dual scale frequency meter / tachometer.
Emergency stop.
Engine monitoring and shutdown for:
- low oil pressure
- high coolant temperature
- over crank
- over speed
- low coolant level
Common external alarms

Optional MONZA Acoustic Enclosure

70 dBA @ 7 metres (average).
4 point lift and skid ends standard.
Central lifting frame optional.
Lockable doors.
Vertical air discharge.
Compact footprint design.

Optional CONTRACTOR Acoustic Enclosure

85 dBA @ 1 metre (average).
4 point lift and skid ends standard.
Central lifting frame optional.
Extended fuel tank option (with skid ends).
Vertical air discharge.
Locable doors.

12 Lite Detector Control Panel

Controls generator set start and shutdown.
Automatic remote start.
DC panel lighting.
Panel mounted on vibration isolators.
Analog gauges display performance trends.

Engine

Cummins NT/A855, 6 cylinder, diesel engines. 50°C radiator. 24 Volt starting, battery charge alternator. Spin-on replaceable element fuel and oil filters. Electronic governor. Dry element air filter.

Alternator

Brushless, single bearing, revolving field. 4-pole screen protected drip proof. Class H insulation. Rotor and exciter impregnated with tropical grad insulating polyester resin. Epoxy coated stator winding. Sealed solid state automatic voltage regulator. Permanent magnet exciter.

Chassis

Fabricated and welded chassis. Builtin anti-vibration mountings. In-skid fuel tank. Flexible fuel lines.

Technical Data	Generating Sets
Set model	BM-250A	CB-280A
Prime rating*	250kWe 312kVA	280kWe 350kVA
Standby rating"	275kWe 343kVA	312kWe 390kVA
Set output	380/415V 50 Hz	380/415V 50 Hz
Engine make	Cummins	Cummins
Model	NT855G6	NTA855G4
Cylinders	Six	Six
Engine configuration	In-line	In-line
Governor / class	Electronic	Electronic
Aspiration	Turbocharged	Turbocharged Aftercooled
Bore and stroke	140mm x 152mm	140mm x 152mm
Compression ratio	14:1	14:1
Cubic capacity	14 Litres	14 Litres
Cranking current @ 0°c	640A	640A
Engine Output-Prime	272 kWm	309 kWm
Nett at flywheel- standby	302 kWm	342 kWm
Max. load acceptance - single steps	172 kWe	175 kWe
Alternator size (Prime)	HC434E	HC434F
Alternator voltage regulation	±1.0%	±1.0%
Alternator insulation class	H	H
Fuel consumption (Prime) 100% load	69 L/hr	76 L/hr
Fuel consumption (Standby) 100% load	76 L/hr	84 L/hr
Lubrication oil consumption	0.5% of fuel consumption	0.5% of fuel consumption
Lubrication oil capacity	38.6 Litres	38.6 Litres
In-skid fuel tank capacity-open set	600 Litres	600 Litres
Fuel tank capacity - MONZA Canopy	1300 Litres	1300 Litres
Fuel tank capacity - CONTRACTOR Canopy	850 Litres	850 Litres
Ext. fuel tank capacity - CONTRACTOR Canopy	1300 Litres	1300 Litres
Coolant capacity-radiator and engine	69.3 Litres	69.8 Litres
Exhaust temp-full load	574°C	524°C
Exhaust gas flow-full load prime	1.071 m3/s, 3855.6M3/hr	1.128M3/s, 4060.8M3/hr
Exhaust gas back pressure max	10.2 kPa, 76mm Hg	10.2 kPa, 76mm Hg
Air flow-radiator (50°C ambient)	8.6M3/s, 30960M3/hr	8.6 m3/s, 30960m3/hr
Air flow - engine intake	0.3608m3/s, 1299M3/hr	0.408m3/s, 1468.8M3/hr
Heat radiated to ambient	57 kW	65 kW
Derating factors - temp.	2% per 11 °C above 40°C	2% per 11 °C above 40°C
Derating factors - altitude	4% per 300m above 1525m	4% per 300 m above 1525m