The power module is equipped with the following components: engine, generator, control systems, radiator and exhaust systems.
Engine
G3516B Generator Set Engines are electronically controlled natural gas engines. The engines are equipped with both jacket water aftercooling and separate circuit aftercooling.
Engine efficiency and engine performance depend on adherence to proper operation and maintenance recommendations. Use the recommended fuels, lubrication oils, and coolant. Pay special attention to the air cleaner, to the fuel system, to the lubrication system, and to the cooling system maintenance. Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" for more information on maintenance items.
Generator
The SR4B brushless generator can be used with the following loads: mixed loads of motors and lights, SCR-controlled equipment, computer centers, installations of communications and petroleum drilling applications.
SR4B generators are utilized in three-phase full-wave excitation and regulation. The frame size determines whether the generators are four pole or six pole design with six lead configuration or twelve lead configuration. The generators are capable of producing electrical power in either 50 Hz or 60 Hz applications.
Power Module Enclosure
Basic Container
The enclosure for the power module is a shipping container that is mounted to an undercarriage chassis. The container meets the following standards and regulations:
- ISO/TC 104 Requirements for cargo containers
- ANSI/ MH5.1 Basic requirements for cargo containers
- ANSI/MH5.1.1 Requirements for closed van containers
- UIC Code 592-1 International union of railway
Access Door for the Load Cable
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Crushing hazard! Read and understand the instructions and warnings in the Operation and Maintenance manual. Failure to follow the instructions or heed the warnings could cause serious injury or death. |
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The access door for the load cables may provide a crush hazard if the door is not secured in a proper fashion. To properly secure the door, open the door and push up on the center of the linkage.
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| Illustration 1 | g00922582 |
Securing the access door for the load cables | |
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| Illustration 2 | g00773429 |
Access door for the load cable | |
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| Illustration 3 | g00773448 |
Bus bar with connected load leads | |
The access door for the load cable is located outside of the power module. This is for access to the bus bars in order to connect the load leads.
Fire Extinguishers
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| Illustration 4 | g00773468 |
Fire extinguisher | |
Fire extinguishers are standard equipment.
Louvers
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| Illustration 5 | g00773474 |
Louver | |
Louvers are installed in the power module in order to receive fresh air. The louvers are sized in order to meet the inlet air supply that is required for the power module. The louvers allow fresh air to enter the power module that is needed for the engine air inlet and for radiator cooling during full load.
There are louvers that can be opened and closed manually. There are also louvers that can be opened or closed automatically. The louvers that are operated manually require the operator to open the louvers before the operation of the power module and the louvers that are operated manually require the operator to close the louvers after the operation of the power module. Automatic louvers are opened and closed by 24 volt electric actuators. The electric actuators will open the louvers when the engine is started. The electric actuators will close the louvers when the engine is stopped.
Wiring for the Power Module Enclosure
Batteries
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| Illustration 6 | g00773491 |
Batteries | |
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| Illustration 7 | g00773498 |
Battery disconnect switch | |
The batteries for the power module are mounted in racks on the floor along one side of the generator set against the wall. The batteries provide power for the engine and for 24 volt interior lighting. The batteries are connected to a battery charger and to the alternator for charging. A battery disconnect switch is mounted to the generator. The battery disconnect switch is used to prevent the engine from being started while the power module is not being used. The battery disconnect switch is used to prevent any battery drain while the power module is not being used.
Auxiliary AC Power Distribution
Circuit breakers are available for 120/240 volt auxiliary power distribution.
Interior Lighting
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| Illustration 8 | g00773502 |
Interior lighting | |
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| Illustration 9 | g00773508 |
Switches for interior lights | |
There are 24 volt interior lights that are mounted in the engine area and in the operator control area inside the power module. The lights are wired to a timer switch that can be set from 0 to 60 minutes. The timer switch is mounted to the wall beside the entrance. These lights are powered from the batteries.
Incandescent lighting and fluorescent lighting that is 120 volt is available as an option.
Outlets
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| Illustration 10 | g00773515 |
Electrical outlet receptacle | |
Electrical outlet receptacles that are mounted to the wall are available as an option.
Switchgear
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| Illustration 11 | g00913989 |
Low voltage switchgear | |
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| Illustration 12 | g00913987 |
Medium voltage switchgear | |
A floor-standing switchgear and controls are provided with the power module. This is for the proper controls and protection of the generator set. The following components are included within the switchgear.
Electronic Modular Control Panel (EMCP II)
The EMCP II monitoring system components for the engine and for the generator are contained in the switchgear.
Paralleling
The controls for either manual or automatic paralleling are contained within the switchgear. For further information, refer to Operation and Maintenance Manual, SEBU7607, "Power Module Switchgear".
Circuit Breaker
The circuit breaker is electrically operated. The circuit breaker is equipped with a trip unit that is solid-state for overload and fault protection. The circuit breaker includes a DC shunt trip coil that is activated by any monitored fault from the generator set. The circuit breaker is sized for the full load capacity of the generator set.
Load Sharing Module
The switchgear is equipped with a load share module for governing of the engine during parallel operation. The load share module contains the following controls for operation: speed adjust potentiometer, idle/rated switch and isochronous/droop switch.
Transformers
Three transformers are included in the switchgear in order to reduce the voltage for auxiliary power for the power module. Two transformers are connected to the generator leads connection of the circuit breaker. One transformer is connected to the load connection of the circuit breaker. The transformers are protected from an overload with fuses.
Bus Bars
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| Illustration 13 | g00773433 |
Bus bar assembly | |
The bus bars are three-phase, fully rated, neutral bus bars. The bus bars have the National Electrical Manufacturers Association (NEMA) hole pattern. The bus bars are for the connection of the load cables. The bus bars are also for the connection of the cables of the generator. The bus bars are sized for full load capacity of the generator set. The ground bus is for a ground connection from the switchgear to the generator. The ground bus is the ground connection from the switchgear to the container. The ground bus is also a connection for the power module to earth ground. The bus bars are accessible from outside of the power module at the access door for the load cables.