IEEE Standards - draft standard template

2013-02-28 · An accessory on the transfer switch, known as a fast in-phase monitor or synch-check element (Device 25), measures the phase-angle difference between the two power sources. An on-site generator set would be controlled by an automatic synchronizer, which recognizes that the two sources go in and out of phase. At the proper window or acceptable phase-angle difference between the … ................
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