overload relay


Also found in: Acronyms.

overload relay

[′ō·vər‚lōd ‚rē‚lā]
(electricity)
A relay that opens a circuit when the load in the circuit exceeds a preset value, in order to provide overload protection; usually responds to excessive current, but may respond to excessive values of power, temperature, or other quantities. Also known as overload release.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

overload relay

A relay in the circuit of a motor which causes the motor to be disconnected from its source of power if the current to the motor exceeds a predetermined value.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Overload Relays for 9 to 25 A contactors protect motor windings from burning due to overloads, locked rotor current, or open-phases.
* Fuji TK26E overload relays are $25.00, have a 1-year warranty
The research team confirmed that the developed MIT electromagnetic switch is satisfied with the operating conditions of the overload relay given in a Korean technology standard, Article 5.6, KSC 4504 compatible with the international standard 60947-4-1.
The E300 overload relay easily integrates into the Rockwell Software Studio 5000 control environment from Rockwell Automation via an add-on profile.
Once a motor trips, the overload relays must be allowed to cool down before the conveyor can be restarted.
Also available are 30 and 22 mm pilot devices, 16 and 13 mm indicator lights, contactors, overload relays, motor protection circuit breakers, disconnect switches, cam switches, terminal blocks, and general purpose relays.
Advanced motor protection features of Motor Logic[R] Plus II overload relays provide the capability to customize protection levels and make the Model 6 iMCC appropriate for any motor control center application.
The DUO Series of motor contactors, overload relays, and manual motor starters can provide a complete motor control solution up to 300 hp.
CGT Series thermal overload relays integrally mount to CGC Series contactors, and they provide thermal over-load protection with Class 10 trip characteristics.