| 摘要 |
An automatic transfer switch having an automatic transfer control provides electric power to a load. The automatic transfer switch includes a power switching device provided with electric power from a first power source having a first status and a second power source having a second status. The automatic transfer control is able to be operated by a mode control to set the automatic transfer control to a monitor mode in which the automatic transfer switch refrains from operating the power switching device, monitors and provides an indication of the first status and of the second status, and provides an indication of how the automatic transfer control would operate the power switching device were the automatic transfer control not set to the monitor mode.
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