Archivos para mayo, 2009

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Fabricantes de Plantas Eléctricas

Ventas de plantas  FG WILSON en http://www.stmeu.com

Motores Serie 400 Perkins de Grupos Electrógenos FG Wilson.

Perkins 400 Series

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General Information

• LCP2 panel as standard.

• Optional;

• LCP0, LCP1

• Access 4000.

• All panel communication options available.

• Available in G – Series canopy.

• Bunded base tank option (integral to canopy)

• Accepts 100% load within G2 standards

• Within EPA and EC emission limits for 2004

• Bare engine noise reduced by

• Compact Timing device fuel injection pump.

• New combustion chamber design.

• 40% Antifreeze as standard (50% optional)

400 Series Design Features -1-

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400 Series Design Features -2-

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Engine build list numbering system

Standard engine build list code; Code I – Engine build code Code II – Engine build list The build list increases numerically as changes are made. Code III – Country of Manufacture Code IV – Engine build list Individual serial number commencing with 000001 increasingnumerically. Code V – Year of manufacture 

Coolant System Antifreeze
The coolant must consist of equal quantities of anti freeze and soft water. The corrosion inhibitor in the antifreeze will be diluted if a concentration of less than 50% is used.
Concentrations of more than 50% of antifreeze may have an adverse effect on the cooling properties of the coolant.

If an antifreeze mixture, other than Perkins Powerpart is used to prevent frost damage, it must have an ethanediol base (ethylene glycol) with a corrosion inhibitor. The specification must be at least as good as BS 6580, ASTMD 3306-89, or AS 2108-1977.

Caution:

Do not use salt water or any other coolant that can cause corrosion in the closed cooling circuit.


Thermostat
Thermostat opens 80ºC – 84ºC, and is fully open at 95ºC

Fuel Specification

To get the correct power and performance from the engine, use good quality fuel. The recommended fuel specification for Perkins engines is shown below:-

Cetan number:45

Mínimum Viscosity:2.0 / 4.5 centistokes at 40 °C (104 °F)

Density:  0,835 / 0,855 kg/litre

Sulphur: 0.2% of mass, maximum

Distillation:85% at 350 °C (662 °F)

Cetane number; Indicates ignition performance. Fuel with a low cetane number can cause cold start problems and affect combustion.

Viscosity; Is the resistance to flow and if this is outside limits, engine performance can be affected.

Density;  Low density will reduce engine power, higher density will increase engine power and exhaust smoke.

Sulphur;  High sulphur content (not normally found in Europe, N. America or Australasia) can cause engine wear. Where only high sulphur fuels are available, it will be necessary to use a highly alkaline lubricating oil in the engine or reduce the lubricating oil change interval.

Distillation;  This is an indication of the mixture of different hydrocarbons in the fuel. A high ratio of light weight hydrocarbons can affect the combustion characteristics.

Renewing the Engine Breather Assembly

The breather assembly (A1, A3 and A4) should be renewed every 2000 hours by a person who has had the correct training.

Caution: Ensure that the components of the breather assembly are fitted in their correct position (A). If they are incorrectly fitted, the engine may be damaged.

1. Release the four setscrews (A2) and remove the breather cover (A1), the spring (A4) and the diaphragm assembly (A3).

Caution: It is important that the area around the vent hole (A6) is clean.

2. Clean the breather cavity (A5) in the rocker cover.

3. Fit a new breather assembly into the cavity in the rocker cover, ensuring that the breather cover, diaphragm and spring are assembled correctly.

4. Tighten the four setscrews.

High Pressure Pipes Optimised

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Fuel Pump Return

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To eliminate air from the fuel system

1. Loosen the vent screw on the fuel filter (1).

2. Operate the hand primer until fuel, free of air, flows from the vent screw. Tighten the vent screw (1).

3. Loosen the vent screw on the fuel injection pump (2). Operate the hand primer until fuel, free of air, flows. Tighten the vent screw (2).

4. Attempt to Start the engine using the starter motor for a maximum of 15 seconds (if keystart panel fitted), wait for 30 seconds before trying again.

Caution: When using the starter motor, do not exceed continuous rotation of more than 15 seconds periods. If the engine does not run, on initial rotation, wait for 30 seconds and try again.

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Fuel Injection Pump

To Remove and fit

If the fuel injection pump is renewed, shims of the same thickness as originally fitted should be used.

If a new fuel injection pump is fitted, it should be replaced with a fuel pump with the same part number as originally fitted.

When the fuel injection pump is replaced it is essential that the fuel adjustment screw is not altered from the original setting. The maximum no load speed should be checked after assembly.

Note; There are no service parts available for the 400 series injection pump.

To Check the timing of the Fuel Injection Pump

1. Set the piston for number one cylinder to TDC on the compression stroke. Turn the crankshaft counterclockwise a quarter of a revolution.

2. Remove the Fuel Control Solenoid, high pressure fuel pipes and low pressure fuel from the fuel injection pump.

3. Ensure that the throttle lever is held in the maximum fuel position.

4. Remove the delivery valve holder for number 1 cylinder and remove the delivery valve (store the delivery valve in clean fuel until reassembly).

Note. The Fuel Pump may have to be moved to an upright position to remove and fit the delivery valves.

5. Connect the fuel pump spill pipe (1) to the delivery valve holder for

number 1 cylinder.

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To Check the timing of the Fuel Injection Pump

6. Connect a suitable clean fuel reservoir (1), which has a tap and contains approximately 0.2 litres (1/4 pint) of clean fuel, to the fuel injection pump inlet.

7. Put a waste fuel container below the pipe neck and open the tap, if set correctly the fuel should flow.

Note; The fuel reservoir should be approximately 152mm (6in) above the fuel injection pump.

8. Turn the crankshaft slowly until the fuel flow reduces to a drop which falls every 7 – 10 seconds. This is then the timing point.

9. Use the value shown by the timing mark (2) with the injection timing table below.

To Check the timing of the Fuel Injection Pump

10. If the engine timing is incorrect adjust the thickness of the fuel injection pump shim.

Note; Changing the fuel injection pump shim by 0.1mm will change the timing by approximately one degree. Thicker shims will retard the timing and thinner shims will advance the timing.

11. Fit the delivery valve (1) and tighten the delivery valve holder.

12. The engine must be tested on an available load to check the maximum no load speed and engine settings after assembly.

Compact Timing Device

Allows Fuel Injection pump to alter it’s timing depending on throttle position.
By reducing initial injection volume it improves timing co
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Benefits;
Reduction in noise/diesel knock.
Reduction in Nox emissions.
Reduction in smoke at low speed.

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Compact Timing Device Operation

How does the CTD work?

The very small sub port drilling in the plunger barrel will only allow a finite volume of fuel to pass through it, therefore when the plunger rises at a slower rate because the engine is rotating slowly, the volume of fuel allowed to pass through the sub port causes the fuel delivery to the injectors to be delayed until the lower edge of the CTD Cut covers the sub port.

However as the rotational speed of the engine increases, the rise rate of the plunger also increases but the fuel attempting to exit the sub port is in excess of the capacity of the port, thus some of the fuel is forced to exit via the injector thus advancing the injection timing from its original static setting.

This brings about the improvements in emissions, smoke, power and noise.

Angleich Governing System

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Angleich Operation;
The angleich unit works by trimming down the fuel delivery as the governor weights and spring come into equilibrium. A change in this state caused by the slowing of the engine as load increases allows the unit to quickly increase the fuel giving a rapid increase in torque.
This torque back-up gives increased power as engine load is increased at any governed speed.
Angliech is an obscure German word for adjuster however this does not mean that the unit can be adjusted to the customers requirements or by the customer.
The units are set up in Japan, by ISM, for compressive resistance and for movement. They are then checked by PSEL on a £10,000 checking machine.
Each unit is set for a particular engine type which means that a unit set up for a 404C.22 will not suit a 403C.15 and vice versa.
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Pre-combustion chamber

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Tamper Evident Caps

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Maximum fuel screw and maximum speed screw
The maximum fuel setscrew (1) and the maximum speed setscrew (2) should not be adjusted by the operator.
Tamper evident caps (3), are fitted to the max. speed screw and used to reduce the incidence of unnecessary adjustment.
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Lucas Fuel Filter

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Oil Specification

- Oil type API-CH4 or ACEA E5 will be the standard service oil recommendation.

- Use of too high a spec of oil too early in an engines life can cause the cylinder bores to become glazed.

- Ensure the lubricating oil is filled slowly and check the correct levels with the dipstick after warm up.

- Change the oil and filter in accordance with the service instruction.

- Deep sump for greater oil capacity.

- Drain tap fitted as standard.

Oil Viscosity

Always ensure that the correct viscosity grade of lubricating oil is used for the ambient temperature range in which the engine will run, as shown in the above chart. clip_image027

 

Increased Oil Flow

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Oil Dipstick Redesign

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New Piston & Oil Control Ring

Designed to work in conjunction with the improved cylinder bore honing to reduce oil consumption.

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This ring when used on other product range has been known as Conformable. This because of its ability to alter its shape slightly to conform to the varying dimensions of the bore.

Closed Circuit Breather (CCB)

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Closed Circuit Breather

Valve Tip Clearance

To Check and Adjust

Note;

The valve adjustment sequence is viewed from the front of the engine.

Rotate the crankshaft clockwise when viewed from the front.

Caution; Only adjust the valve clearances when the engine is cold.

 

 

Estas son en resumen las características técnicas más importantes que definen una planta eléctrica al momento de adquirirla.

GRUPO ELECTRÓGENOCATALOGO GENSETS

1 GENERAL

 

Ítem Descripción Unidad Requerido
1 Fabricante    
2 País    
3 Referencia    
4 Normas   ISO 9001
5 Tipo de servicio   Stand-By
6 Masa total del grupo kg  
7 Eficiencia conjunto motor – generador %  
8 Tiempo máximo para tomar carga s ≤ 10
9 Dimensiones del grupo    
a) Largo mm  
b) Ancho mm  
c) Alto mm  
       
2 GENERADOR
Ítem Descripción Unidad Requerido
1 Fabricante    
2 País    
3 Referencia    
4 Normas    
5 Grado de protección, según IEC 60947-1    
6 Eficiencia  %  
7 Tensión asignada (Ur) (3 fases, 4 hilos) V  
8 Frecuencia asignada (Fr.) Hz  
9 Potencia asignada Kw  
10 Factor de potencia    
11 Reactancia transitoria X’d en el eje directo %  
12 Reactancia sub transitoria X”d en el eje directo %  
13 Reactancia sincrónica Xs %  
14 Corriente de corto circuito térmica asignada (Ith) kA  
15 Factor armónico telefónico (THF) %  
16 Distorsión armónica total de tensión (THD)    
a) En vacío %  
b) Con carga trifásica balanceada libre de armónicos %  
17 Número de polos    
18 Velocidad sincrónica rpm  
19 Clase de aislamiento de los devanados    
20 Regulador de tensión automático     
a) Fabricante    
b) País    
c) Referencia    
d) Rango de ajuste %  
e) Tiempo de respuesta s < 0,5
21 Tipo de sistema de excitación   Sin escobillas
22 Sistema de enfriamiento    
23 Peso para transporte kg  
24 Dimensiones para transporte (Largo x ancho x altura) mm  
       
3 MOTOR
Ítem Descripción Unidad Requerido
1 Fabricante    
2 País    
3 Referencia    
4 Normas   IEC 3046    ISO 9001
5 Eficiencia  %  
6 Potencia asignada en las condiciones del sitio Kw  
7 Datos del cilindro    
a) Número de cilindros    
b) Cilindrada cm3  
c) Carrera mm  
d) Diámetro mm  
8 Consumo de combustible a plena carga l/h  
9 Consumo específico de combustible  l/kW  
10 Desviación máxima de velocidad    
a) Con carga constante (desde vacío a plena carga) % 0,25
b) Con una carga transitoria equivalente al 20% de la capacidad del grupo electrógeno % 3%
11 Combustible Diesel   ASTM-D975 No.2
a) Densidad  kg/dm3  
b) Valor calorífico k J/kg  
c) Temperatura del combustible °C  
12 Torque máximo N/m  
13 Velocidad nominal rpm  
14 Sistema de enfriamiento   Agua
15 Bomba de trasiego de combustible de tanque principal a motor  
16 Número de tiempos del motor   4
17 Peso para transporte kg  
18 Dimensiones para transporte (Largo x ancho x altura) mm  
       

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Documentación de las actividades del mantenimiento