Specification :

SCOPE OF SUPPLY
This equipment offers the latest TB engine variant with air-cooled first stage turbine, up-rated 5400BHP power units, exhibiting very low operational hours elapsed on the power train. The equipment is currently undergoing refurbishment with the gas turbine nearing completion.

Currently being overhauled and witness test available.
The Nomad 5 is a complete, single-trailer power package, capable of generating up to 3.8MW ISO. It can be moved easily and quickly by a standard road tractor unit, transferred from one location to another as changing circumstances dictate and made operational less than 48 hours after arrival on site.

* Proven Reliability
* Dual Fuel Capability
* Black Station Start Capability
* Generator 3.8Mw, 4875kVA ,50Hz, 11kv
* Robust Design Operational in Extreme Climatic Conditions
* Acoustic Treatment

On Board Control Room - The air-conditioned control room houses the turbine generator control and protection systems, auxiliary and control batteries, system battery charger, motor control centre and a selectable 415VAC distribution board. Distribution board inputs provide the facility for external customer supply, on board diesel generator supply for “Power Station Black Start Capability� and auto transfer to auxiliary transformer supply derived from on trailer alternator once the turbine driver is running.

Diesel Compartment - A 500 litre diesel fuel tank is integral to the trailer chassis Housing Perkins Turbocharged Diesel engine driving hydraulic package for turbine starting and auxiliary power generation to provide power to the on trailer 415VAC distribution board.

Turbine Compartment - Housing a TB5400 Model Gas Turbine prime mover, turbine fuel and fluid systems, control devices, instrumentation, turbine lubrication oil tank, and Allen speed reduction gearbox.

Alternator Compartment - Housing GEC-Unipac Alternator rated at 4785kVA, Auxiliary transformer 11KV to 415VAC for trailer internal power distribution.

Cooler and Switchgear Compartment - Whipp & Bourne 11Kv Generator circuit breaker, HV terminal chamber for connection to customer load, turbine lubrication system air blast oil cooler and fire fighting equipment.

Turbine Engine Core

Model TB5400 twin shaft, heavy duty industrial gas turbine, complete with:

* Air inlet casing phased vertically upwards
* Air inlet flexible joint
* Gas generator assembly
* Combustor assembly incorporating 4 combustion chambers
* Power turbine assembly
* Exhaust outlet casing phased vertically upwards
* Exhaust outlet flexible joint

Picture: TB5400 Dual Fuel Gas Turbine Driver Allen Reduction Gearbox 1500rpm

Underbase

* Turbine Trailer underbase of fabricated carbon steel construction, designed for three-point mounting on installation support jacks
* Turbine mounting, allowing thermal expansion towards the non-drive end
* Retractable lifting tubes to facilitate heavy lift handling
* Lubricating oil and auxiliary diesel fuel tanks to underbase

Instrumentation

* Air inlet temperature thermocouples
* Exhaust outlet and power turbine exit temperature thermocouples
* Gas generator speed probe
* Power turbine speed probe
* Mechanical over-speed protection trip
* Bearing mounted vibration proximity probes for gas generator and power turbine with casing mounted seismic sensor to gearbox and driven unit

Lubricating Oil System

* Integral lubricating oil system, including all pipework, serving the gas turbine, gearbox and driven unit
* Lubricating oil tank integral to trailer underbase
* Lube oil pressure and temperature transmitters
* Main pump, gearbox-driven
* Auxiliary pump, AC electric motor driven (pre start and post shutdown lubrication)
* Emergency pump, DC electric motor driven (emergency cooling)
* Lubricating oil supply piping in stainless steel downstream of filters
* Duplex filters with manual changeover valve; differential pressure gauge and differential pressure transmitter
* Lubricating oil pressure gauge and transmitter Oil tank temperature transmitter
* Oil tank level gauge
* Oil tank low oil level transmitter

Lubricating Oil Cooler

* Air blast simplex vertical matrix lubricating oil cooler, suitable for high ambient temperature range.

Lubricating Oil Breather

* Breather system internal to Acoustic Enclosure (Including a carbon steel Sand Trap )
* Lube oil breather piping external vent
* Stainless steel flame trap for mounting in the external breather piping

Starting System - Diesel engine driven hydraulic start system

Ignition System

* High tension igniters (4)
* Fully piped ignition system utilising propane gas fuel supply

Gas Fuel System

* Gas fuel piping in stainless steel
* Gas fuel pressure gauges for fuel valve and burners
* Gas fuel pressure relief valve
* Gas fuel pressure transmitter
* Gas fuel shutoff valve, emergency, rapid acting
* Gas fuel shutoff valve, manually operated
* Gas Fuel Valve

Off Package Gas Fuel System

* Gas fuel block and vent valve assembly (installation by others)

Liquid Fuel System

* Liquid fuel piping in stainless steel
* On trailer Duplex fuel filter permitting on line duty filter replacement
* AC motor driven liquid fuel boost pump, gearbox driven main fuel pump
* Governor-actuated fuel valve
* Solenoid-operated fuel shut-off valve
* Manual emergency shut-off valve
* Burner pressure gauge
* Gas ignition system
* Combustion chamber auto-drain valves

Combustion Air Inlet System

* Standard 2 stage Combustion Air Inlet Filter with particle extraction louver integral to trailer housing
* Optional multistage off trailer Combustion Air Inlet Filter semi permanent installation (optional)
* Combustion Air Inlet Silencer for an overall 85dBA rating (optional)

Combustion Exhaust System

* Exhaust silencer for an overall 85 dB(A) rating (optional for semi permanent installation)
* Combustion Exhaust Ducting Stack to elevation of approx. 6m above ground level (optional for semi permanent installation)

Gearbox and Coupling

* Direct coupled Epycyclic type gearbox of Allen Gear manufacture giving an output shaft speed of 1500 rpm
* Low maintenance Turbo-flex dry diaphragm output coupling between gearbox and AC generator

Control System

The control system incorporates the following functions:

* Turbine Sequencing and Protection
* Fault Monitoring
* Annunciation
* Gas Turbine Speed Control
* Temperature Monitoring
* Turbine Vibration Monitoring
* Turbine Gearbox Vibration Monitoring
* Driven Unit Vibration Monitoring
* Driven Unit Bearing Temperature Monitoring
* Interlocking Control for standard Fire Protection and Gas Detection Monitor
* English language on front panels
* Control Power Supply
* 24V DC and 220/240V AC supply for controls from battery system

AC Generator

* Brushless AC generator, voltage 11kv and frequency to50Hz, to sound attenuation of 85dba
* Generator cooling type CACA
* Generator bearing temperature detectors
* Class F insulation / F total temperatures
* AC generator lube oil system provided by the gas turbine
* Underbase of fabricated steel construction
* Generator alignment jacking screws
* The generator is suitable for non-hazardous area

Generator Control Panel

* Automatic voltage regulator
* Generator metering equipment
* Generator electrical protection relays
* Automatic and manual synchronising facility with check synch
* Neutral Earth Resistor

Electrical Equipment

* On-package AC and DC interface cabling
* Integral earth protection bonding
* Emergency 'Stop' push-buttons externally mounted on turbine underbase
* Local stop push-buttons on turbine AC motors

Batteries

* Nickel-Cadmium batteries are mounted within a carbon steel battery storage cabinet located externally adjacent to control room

Battery Charger

* A simple Erskine battery charger / static inverter is supplied, incorporating a DC-controller to control the turbine DC supply

Acoustic Enclosure

Fitted over the turbine, gearbox and alternator and bolted to turbine underbase, for average sound attenuation to 85dB(A) SPL at 1m distance measured at 1.2m above ground level incorporating:

* Internal lighting
* Painted carbon steel construction
* Access Doors provide for personnel maintenance access
* Removable panels for maintenance access
* Acoustic enclosure ventilation inlet damper
* Acoustic enclosure ventilation outlet damper
* Acoustic enclosure ventilation air flow detector
* Acoustic Enclosure Ventilation System

Ventilation Fan

* AC electric motor driven ventilation outlet fan to Zone 1 classification, duct mounted (Ex d type). Suitable for ambient temperatures of up to 650C.

Ventilation Filter

* High efficiency cleanable pad type combustion air filter.

Fire Protection and Gas Detection System

* 2 - ultra-violet flame detectors
* 1 - heat detector
* 3 - gas detectors
* Twin shot CO2 fire protection system
* Audible and visible alarms
* Enclosed rack-mounted CO2 bottles

Turbine Compressor Cleaning System

* Cold turbine compressor wash system
* Mobile wash trolley, incorporating cleaning fluid/rinse tank fitted with integral pressure relief valve, air pressure control solenoid valve, air/ wash fluid flexible hose with quick release connections, and electrical cable
* Drain system incorporating automatic drain valve
* Pressure transmitter to monitor intermediate stage blow-off valves closing air pressure