The Automatic Paralleling Switch (APS) allows a single generator to peak shave or export-to-utility only when the utility is available. The generator can synchronize to the power source in a soft transition mode, supplementing utility power to perform peak shaving or power exporting.
The Encorp APS may be started in a variety of ways depending on the needs of the facility and the specific application. The ability to start and parallel a generator to the utility for the purpose of peak shaving is most effective when initiated during periods of high utility demand.
As demand for power within a facility increases, the price charged by the utility also increases. Typically, the ‘peak’ demand at a facility lasts for only short periods of time yet the utility charges annual rates based on this peak which is often 10 to 20 times the non-peak rate. Using a KW Demand Level start option, the APS would monitor the utility and automatically start the generator and perform a closed-transition (softload) transfer whenever necessary to avoid excessive utility charges.
There may be certain times of the day or week when utility charges are prohibitive. In these case, the APS may be programmed to parallel the generator to the utility to avoid high rates or simply to exercise the generator.
There are many reasons why a remote start option might be advantageous. Perhaps a utility gives its customers incentives to participate in an Interruptible rate or power exporting program. In this case, the utility uses the Remote Start capabilities of the APS to power the facility from its own generator and then curtail utility delivered power to the facility. The utility increases its own supply, and thecustomer experiences a ‘blip-less’ transfer to its own generator while receiving a favorable utility rate.
If it ever becomes necessary to start and parallel (or transfer) facility loads to the generator manually, the APS provides an easy to use Local Operator interface. Touch-screen controls make the process of starting and stopping the generator easy. System tests may be accomplished in Load and No Load options.
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