automatic relay

automatic relay

[¦ȯd·ə¦mad·ik ′rē‚lā]
(communications)
Means of selective switching which causes automatic equipment to record and retransmit communications.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Highlighted features: New Display and Signal Lamps Blue11 EasySet Prewinders Air Consumption Monitoring and Management System (AirMaster) Automatic Relay Valve Drive (ARVD II Plus) Pick Repair Automation (PRA II Plus)
The most likely explanation is a small localized problem that rippled across the network as grid managers lost control of power flows and automatic relays shut down transmission lines and power plants to prevent further damage to equipment.

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