negative-phase-sequence relay

negative-phase-sequence relay

[′neg·əd·iv ¦fāz ¦sē·kwəns ′rē‚lā]
(electricity)
Relay which functions in conformance with the negative-phase-sequence component of the current, voltage, or power of the circuit.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.