| 摘要 |
<p>A non-rotating portable voltage sag generator includes for each phase (INPUT A, INPUT B, INPUT C) a pair of cascaded standard industrial auto-transformers (T1, T2) each having, for example, six taps (277, 249, 222, 194, 180, and 166) and when they are cascaded, the final output voltage of each phase is a product of the per unit value of each individual auto-transformer. Closed transition switching is provided to switch the auto-transformer into and out of the circuit effectively only during the time a voltage sag is desired. All of the switches and auto-transformers are conveniently carried in a single portable enclosure. There are no moving parts or diesel engines; thus, the non-rotating sag generator is useable in any part of an industrial plant.</p> |
