phase-sequence relay
phase-sequence relay
[′fāz ¦sē·kwəns ′rē‚lā] (electricity)
Relay which functions according to the order in which the phase voltages successively reach their maximum positive values. Also known as phase-rotation relay.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.