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Eaton's Automatic Source Transfer (AST) solutions, also known as Automatic Transfer System (ATS) solutions, protect critical loads that cannot tolerate a sustained loss of voltage event. Through rapid communication and flexible, user-selectable restoration options, the solution helps utilities dramatically minimize service disruptions and quickly re-energizes critical customers. The AST solution is available for three-phase and triple-single devices.
This Automatic Source Transfer (AST) solution is designed to protect critical loads that cannot tolerate a sustained loss of voltage event. Through rapid communication and flexible, user-selectable restoration options, the solution helps utilities dramatically minimize service disruptions and quickly re-energizes critical customers.
The Automatic Source Transfer (AST) solution has an integrated application diagram to allow for a real-time view of the system. The status of the devices as well as AST-related signals are displayed in an easy-to-read dialog. Some controls are also available to make quick changes to modes or disable the AST.
As the world pushes for decarbonization, decentralization and digitalization of power, it brings new complexities to the utility industry. Adapting to the evolving power landscape means upgrading and modernizing your solutions so you can advance the energy transition towards a more sustainable, electrified world. With more than 100 years of electrical engineering experience, innovative digital solutions and expertise across generation, transmission and distribution, Eaton can help you get there.
| Flexible, user-selectable restoration options | Helps utilities quickly return systems back to the normal states after the return of the primary voltage source Local restoration enables each control to be manually operated Automatic restoration / Manual initiation enables restoration to the preferred source to be manually initiated from either control Automatic restoration / Automatic initiation enables retoration to occur once the preferred feeder voltage returns |
| Minimized voltage-sensing requirements |
Only source-side voltage sensing is required for each recloser Eliminates redundant measurements and unnecessary data |
| Fast transfer times |
Allows source transfer to occur before backup power is required, including generators |
| Optional Ground Trip Blocking | When configured for parallel restoration (make-before-break), the AST can block and unblock ground tripping in the devices during the closed transition back to the normal state |
| Voltage simulator | Simulator to allow for easy testing of the system without having to disconnect voltage from the devices in the field |
| Optional voltage seeking | When the system is in manual restoration mode. If voltage has returned on the preferred source and is subsequently lost on the alternate source, the AST can transfer back to the preferred source where the voltage is good without needing to wait for manual operation |
The Automatic Source Transfer (AST) solution has multiple options for how to react when voltage has been restored to the preferred source. The system can be manually returned to normal by operating each device separately, manually returned to normal by operating one device triggering the other device to also change state, or automatically returned to normal after voltage has returned for a configurable period of time.
The Automatic Source Transfer (AST) solution has a voltage-seeking option when the system is in manual restoration mode. If voltage has returned on the preferred source and is subsequently lost on the alternate, the AST can transfer back to the preferred source where the voltage is good without needing to wait for manual operation.
The Automatic Source Transfer (AST) solution has built-in HMI messages for the user standing in front of the controls to indicate various states.
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