Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1997-09-29
1999-07-06
Elms, Richard T.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307 83, 323220, 327261, H01H 3500
Patent
active
059201320
ABSTRACT:
A non-rotating portable voltage sag generator includes for each phase a pair of cascaded standard industrial auto-transformers each having, for example, six taps 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.
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Collins, Jr., Morgan, "A Three-Phase Sag Generator For Testing Industrial Equipment", IEEE Transactions on Power Delivery, pp. 526-532, Jan. 1996.
Bhatt Siddharth C.
Rockfield, Jr. Martin L.
Singh Tejindar P.
Electric Power Research Institute
Elms Richard T.
Wright Jerry G.
Zura Peter
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