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A power module consists of a diesel engine, induction coupling and generator bolted on a solid base frame. The diesel engine sits idle until the mains fails. The induction coupling contains an inner rotor that stores sufficient energy to bridge the diesel start time. The generator provides electrical power to the load in diesel mode. In normal mode, the generator acts as dynamic filter and provides power factor correction.
The digital controller and operation switches and controls are located in a cabinet that is typically placed in an electrical control room. The main circuit breakers that connect the power module to the load and the mains are placed in electrical switchboards. Each power module is connected to a reactor (choke coil) that uncouples the utility power from the load.
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